Patent Publication Number: US-2022235947-A1

Title: Air Conditioner Indoor Unit and Air Conditioner

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a continuation of International Patent Application No. PCT/CN2020/138384, filed on Dec. 22, 2020, which claims to the benefit of the Chinese Patent Application No. 202011443398.8 filed with the China National Intellectual Property Administration on Dec. 11, 2020 and entitled “Air Conditioner Indoor Unit and Air Conditioner,” the entire contents of which are incorporated herein by reference. 
    
    
     FIELD 
     The present disclosure relates to the technical field of air conditioning equipment, and in particular to an air conditioner indoor unit and an air conditioner. 
     BACKGROUND 
     With the development of air conditioning technology, users&#39; demand for air conditioners is not limited to simple temperature and humidity regulation. How to improve the comfort of users&#39; living environment has become the development trend of air conditioning technology. Air conditioners typically use a reduced fan rotational velocity to achieve a “breezeless” air out. However, because the fan is always running during the “breezeless” air out, the operational noise of the fan still affects the user experience. 
     SUMMARY 
     The present disclosure is intended to solve at least one of the technical problems existing in the prior art or related art. 
     To this end, the first aspect of the present disclosure provides an air conditioner indoor unit. 
     The second aspect of the present disclosure provides an air conditioner. 
     In view of the above, the first aspect of the present disclosure provides an air conditioner indoor unit, comprising: a shell comprising an air inlet and an air outlet, the air outlet being located at the bottom of the shell along a first direction; and at least one heat exchanger group, the at least one heat exchanger group being provided in the shell, and air flowing through the air inlet to the at least one heat exchanger group for heat exchange and then flowing out from the air outlet, wherein any one of the at least one heat exchanger groups comprises: a first heat exchanger; a second heat exchanger, wherein a first connecting line between an upper end portion and a lower end portion of the second heat exchanger is arranged to be inclined with respect to the first direction, and the lower end portion of the second heat exchanger is provided adjacent to an upper end portion of the first heat exchanger; a third heat exchanger spaced from the first heat exchanger along a second direction; and a fourth heat exchanger, wherein a second connecting line between an upper end portion and a lower end portion of the fourth heat exchanger is arranged to be inclined with respect to the first direction, and the lower end portion of the fourth heat exchanger is connected to the upper end portion of the third heat exchanger, wherein the upper end portion of the fourth heat exchanger is connected to the upper end portion of the second heat exchanger, the first direction is perpendicular to the second direction, the first direction is a direction of gravity, projection is performed along the first direction, and an intersection point of an extension line of the first connecting line and an extension line of the second connecting line is located between the first heat exchanger and the third heat exchanger. 
     The present disclosure provides an air conditioner indoor unit comprising a shell and at least one heat exchanger group. The shell comprises an air inlet and an air outlet, and any one heat exchanger group comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, and a fourth heat exchanger. The first heat exchanger, the second heat exchanger, the third heat exchanger, and the fourth heat exchanger are all located inside the shell, and the air outlet is located at the bottom of the shell. The first heat exchanger and the third heat exchanger are provided on two sides in the shell along the second direction, and the lower end portion of the second heat exchanger is adjacent to the upper end portion of the first heat exchanger and located above the first heat exchanger. The lower end portion of the fourth heat exchanger is adjacent to the upper end portion of the third heat exchanger and located above the third heat exchanger. The first connecting line between the upper end portion and the lower end portion of the second heat exchanger and the second connecting line between the upper end portion and the lower end portion of the fourth heat exchanger are both arranged to be inclined with respect to the first direction, i.e., the direction of gravity. 
     When the air conditioner indoor unit is in operation, the indoor air flows into the indoor from the air outlet after heat exchange via the air inlet, the first heat exchanger, and the second heat exchanger on one side of the shell, and the indoor air flows into the indoor from the air outlet after heat exchange via the air inlet, the third heat exchanger, and the fourth heat exchanger on the other side of the shell. That is to say, when the natural convection refrigeration mode is running, the indoor air can be subjected to heat exchange by natural convection, and the whole heat exchange process does not require the fan to work such that the noise generated by the operation of the fan is avoided under the condition of ensuring a good heat exchange capability, thereby improving the user comfort. 
     Further, by arranging the second heat exchanger and the fourth heat exchanger to be inclined in the shell, the inner space of the shell can be effectively used, the space occupied by the second heat exchanger and the fourth heat exchanger in the vertical direction is reduced, then the heat exchange area of the heat exchanger is increased, and then the air volume of the inlet air after the heat exchange can be increased to meet the demand for refrigerating capacity during the air inlet of the natural convection such that the user&#39;s comfort and satisfaction are greatly improved. It can realize the situation that when an air conditioner is used in a bedroom scenario the user would not be affected by blowing and noises as the user has a good body temperature while sleeping, namely, the air conditioner indoor unit has the effects of breezeless air-out and no noise, and is suitable for popularization and application. 
     In addition, the air conditioner indoor unit in the above-mentioned embodiments provided by the present disclosure may further have the following additional technical features. 
     In the above embodiments, further, a cross-sectional shape constituted by the second heat exchanger and the fourth heat exchanger is an inverted V-shape in a cross-section perpendicular to a third direction, wherein the third direction is perpendicular to both the first direction and the second direction. 
     In any of the above embodiments, the following is further included: a jet nozzle located between the upper end portion of the fourth heat exchanger and the upper end portion of the second heat exchanger, the jet nozzle enclosing with any one of the heat exchanger groups to form a heat exchange chamber, and the heat exchange chamber being in communication with the air outlet. 
     In any of the above embodiments, the following is further included: a jet air channel being in communication with the jet nozzle, a cross-sectional area of the jet air channel gradually decreasing along a flow direction of the jet air channel. 
     In any of the above embodiments, at least one heat exchanger group comprises multiple heat exchanger groups, wherein the multiple heat exchanger groups are successively spaced apart along the second direction of the shell, and any one of the heat exchanger groups is correspondingly provided with the jet nozzle. 
     In any of the above embodiments, further, the shell comprises: an air inlet cover body, the air inlet being opened on the air inlet cover body; a base, the air inlet cover body being provided on the base, and the air outlet being opened on the base; and a partition plate, being provided between the air inlet cover body and the base, the partition plate being connected to the air inlet cover body and the base, wherein the at least one heat exchanger group is connected to the partition plate. 
     In any of the above embodiments, further, any one of the heat exchanger groups is an axisymmetric structure having an axis of symmetry extending along the first direction. 
     In any of the above embodiments, further, the second heat exchanger comprises multiple second fins, and the inclination angle of the second fin with respect to the first direction ranges from 0° to 45°, the fourth heat exchanger includes multiple fourth fins and an inclination angle of the fourth fin with respect to the first direction ranges from 0° to 45°. 
     In any of the above embodiments, further, along the second direction, the ratio of a width of the air outlet to the width of the shell ranges from 0.2 to 0.9; and/or a ratio of a width of the air outlet along the second direction to a distance from an end face of the jet nozzle to a plane where the air outlet is located ranges from 0.1 to 0.7. 
     In any of the above embodiments, further, projection is performed along the first direction of the shell to a plane perpendicular to the first direction, in an obtained projection plane, a width of at least one heat exchanger group is equal to a difference value between the width of the shell and a width of the jet nozzle. 
     In any of the above embodiments, further, the air inlet is higher than the lower end portion of at least one heat exchanger group at one side of the air outlet along the first direction of the shell. 
     In any of the above embodiments, further, the first heat exchanger comprises multiple first heat exchange tubes and multiple first fins, wherein the multiple first heat exchange tubes are all arranged in a single row, and multiple first fins are sleeved on the first heat exchange tubes, the second heat exchanger comprises multiple second heat exchange tubes and multiple second fins, wherein the multiple second heat exchange tubes are all arranged in a single row, and the multiple second fins are sleeved on the second heat exchange tubes, the third heat exchanger comprises multiple third heat exchange tubes and multiple third fins, wherein the multiple third heat exchange tubes are all arranged in a single row, and the multiple third fins are sleeved on the third heat exchange tubes, the fourth heat exchanger comprises multiple fourth heat exchange tubes and multiple fourth fins, wherein the multiple fourth heat exchange tubes are arranged in a single row, and the multiple fourth fins are sleeved on the fourth heat exchange tubes. 
     In any of the above embodiments, further, the air inlet comprises a jet air inlet and the main air inlet, wherein the jet air inlet is in communication with the jet nozzle, and the main air inlet is in communication with the heat exchange chamber via the at least one heat exchanger group, the jet air inlet is opened on a side wall of the shell, the main air inlet is opened on two side walls of the shell which are opposite along the second direction, and the main air inlet is opened on a side wall of the shell along a third direction, and/or a top wall of the shell. 
     According to a second aspect of the present disclosure, there is provided an air conditioner comprising: the air conditioner indoor unit according to any one of the above embodiments of the first aspect. 
     The air conditioner provided by the present disclosure comprises the air conditioner indoor unit of any embodiment of the above first aspect. Accordingly, it has all the advantageous effects of the air conditioner indoor unit of the first aspect described above which will not be described in detail herein. 
     The additional aspects and advantages of the present disclosure will become apparent in the description below, or learned by practice of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. Wherein, 
         FIG. 1  is a schematic view illustrating a structure of an air conditioner indoor unit provided according to first embodiments of the present disclosure; 
         FIG. 2  shows a schematic view of the structure of the embodiments of  FIG. 1  from a first viewing angle; 
         FIG. 3  shows a schematic view of the structure of the embodiments of  FIG. 1  from a second viewing angle; 
         FIG. 4  shows a schematic view of the structure of the embodiments of  FIG. 1  from a third viewing angle; 
         FIG. 5  shows a schematic view of the structure of a jet structure according to first embodiments of the present disclosure; 
         FIG. 6  shows a schematic view of the structure of a jet structure according to second embodiments of the present disclosure; 
         FIG. 7  shows a schematic view of the structure of a jet structure according to third embodiments of the present disclosure; 
         FIG. 8  shows an explosive view of an air conditioner indoor unit provided according to second embodiments of the present disclosure; 
         FIG. 9  shows an explosive view of the embodiments shown in  FIG. 8  from a first viewing angle; 
         FIG. 10  shows an explosive view of the embodiments shown in  FIG. 8  from a second viewing angle; 
         FIG. 11  shows a schematic view of the structure of the embodiments of  FIG. 8  from a third viewing angle; 
         FIG. 12  shows a schematic view of the structure of an air conditioner indoor unit of the embodiments shown in  FIG. 8 ; 
         FIG. 13  shows a schematic view of the structure of the embodiments shown in  FIG. 12  from a first viewing angle; 
         FIG. 14  shows a schematic view of the structure of the embodiments shown in  FIG. 12  from a second viewing angle; 
         FIG. 15  shows a schematic view of the structure of the embodiments shown in  FIG. 12  from a third viewing angle; 
         FIG. 16  shows an explosive view of an air conditioner indoor unit provided according to a third embodiments of the present disclosure; 
         FIG. 17  shows an explosive view of the embodiments shown in  FIG. 16  from a first viewing angle; 
         FIG. 18  shows an explosive view of the embodiments shown in  FIG. 16  from a second viewing angle; 
         FIG. 19  shows a schematic view of the structure of the embodiments of  FIG. 16  from a third viewing angle; 
         FIG. 20  is a schematic view illustrating the structure of an air conditioner indoor unit provided according to other embodiments of the present disclosure; 
         FIG. 21  shows an effect drawing of the heat exchange capability calculation for the case of jet heat exchange and natural convection heat exchange as provided by some embodiments of the present disclosure; 
         FIG. 22  shows a schematic effect drawing of a jet angle provided by some embodiments of the present disclosure; 
         FIG. 23  shows an effect drawing of two-sided wall surface backflow caused by a jet angle that does not meet design requirements as provided by some embodiments of the present disclosure; 
         FIG. 24  shows an effect drawing of the temperature distribution inside a shell under natural convection heat exchange conditions provided by some embodiments of the present disclosure; 
         FIG. 25  shows an effect drawing of the velocity distribution inside a shell under natural convection heat exchange conditions provided by some embodiments of the present disclosure; 
         FIG. 26  shows an effect drawing of the temperature distribution inside a shell under no jet heat exchange condition provided by some embodiments of the related art; 
         FIG. 27  shows an effect drawing of the velocity distribution inside a shell under no jet heat exchange condition provided by some embodiments of the related art. 
     
    
    
     Wherein the corresponding relationships between the reference numerals and component names in  FIGS. 1-25  are: 
       1  air conditioner indoor unit,  10  shell,  102  base,  104  air inlet cover body,  12  air inlet,  120  jet air inlet,  122  main air inlet,  14  air outlet,  16  heat exchange chamber,  20  first heat exchanger,  22  second heat exchanger,  24  third heat exchanger,  26  fourth heat exchanger,  30  jet structure,  32  air channel,  322  air supplying air channel,  324  jet air channel,  34  jet nozzle,  40  fan,  50  partition plate,  52  first heat exchange chamber,  54  second heat exchange chamber,  60  first water receiving tray,  62  second water receiving tray. 
     Wherein the corresponding relationship between the reference numeral and component name in  FIGS. 26 and 27  is: 
       200 ′, heat exchanger. 
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     In order to make the above objects, features, and advantages of the present disclosure more clearly understood, a more particular description of the present disclosure will be rendered below by reference to specific implementation modes and the appended drawings. It should be noted that the embodiments and features of the embodiments of the present disclosure can be combined with each other without conflict. 
     In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure may be implemented otherwise than as described herein, and accordingly, the scope of the present disclosure is not limited by the specific embodiments disclosed below. 
     An air conditioner indoor unit  1  and an air conditioner according to some embodiments of the present disclosure are described below with reference to  FIGS. 1 to 25 . 
     EMBODIMENTS 1 
     As shown in  FIG. 1  to  FIG. 20 , according to a first aspect of the present disclosure, there is provided an air conditioner indoor unit  1 , comprising a shell  10  and at least one heat exchanger group arranged in the shell  10 . The shell  10  comprises an air inlet  12  and an air outlet  14 , wherein along a first direction, the air outlet  14  is located at the bottom of the shell  10 , and the air flows through the air inlet  12  to at least one heat exchanger group for heat exchange and then flows out from the air outlet  14 . 
     Any one of the at least one heat exchanger groups comprises: a first heat exchanger  20 ; a second heat exchanger  22 , wherein a first connecting line between an upper end portion and a lower end portion of the second heat exchanger  22  is provided obliquely with respect to the first direction, and the lower end portion of the second heat exchanger  22  is provided adjacent to the upper end portion of the first heat exchanger  20 ; a third heat exchanger  24  which is spaced apart from the first heat exchanger  20  in a second direction; and a fourth heat exchanger  26 , wherein a second connecting line between the upper end portion and the lower end portion of the fourth heat exchanger  26  is provided obliquely with respect to the first direction, and the lower end portion of the fourth heat exchanger  26  is provided adjacent to the upper end portion of the third heat exchanger  24 , wherein the upper end portion of the fourth heat exchanger  26  is connected to the upper end portion of the second heat exchanger  22 , the first direction is perpendicular to the second direction, the first direction is a gravity direction, the projection is performed along the first direction, and the intersection point of the extension line of the first connecting line and the extension line of the second connecting line is located between the first heat exchanger  20  and the third heat exchanger  24 . 
     The present disclosure provides an air conditioner indoor unit  1  comprising a shell  10  and at least one heat exchanger group. Wherein, as shown in  FIGS. 1 to 3 , the shell  10  includes an air inlet  12  and an air outlet  14 . Any heat exchanger group includes a first heat exchanger  20 , a second heat exchanger  22 , a third heat exchanger  24 , and a fourth heat exchanger  26 . The first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  are all located inside the shell  10 , and the air outlet  14  is located at the bottom of the shell  10 . The first heat exchanger  20  and the third heat exchanger  24  are provided at both sides in the shell  10  in the second direction, and the second heat exchanger  22  is connected to and positioned above the first heat exchanger  20 . The fourth heat exchanger  26  is connected to and positioned above the third heat exchanger  24 . Both the second heat exchanger  22  and the fourth heat exchanger  26  are provided obliquely with respect to the first direction, i.e., the direction of gravity. 
     Specifically, as shown in  FIGS. 2 to 4 , the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  are provided in the shell  10 . In the first direction, the second heat exchanger  22  and the fourth heat exchanger  26  are respectively located above the first heat exchanger  20  and the third heat exchanger  24 . As shown in  FIG. 4 , the side walls of the two opposite sides of the shell  10  extend in the first direction, and the second heat exchanger  22  and the fourth heat exchanger  26  are both provided obliquely with respect to the first direction, namely, the second heat exchanger  22  and the fourth heat exchanger  26  are provided obliquely with respect to the side wall of the shell. 
     Further, as shown in  FIG. 4 , two surfaces of the second heat exchanger  22  opposite in the first direction are angled with respect to the side wall of the shell. In a similar way, two surfaces of the fourth heat exchanger  26  opposite in the first direction are angled with respect to the side wall of the shell. By arranging both the second heat exchanger  22  and the fourth heat exchanger  26  to be oblique with respect to the first direction, the inner space of the shell  10  can be effectively used such that the space occupied by the second heat exchanger  22  and the fourth heat exchanger  26  in the vertical direction is reduced. Then the first heat exchanger  20  and the third heat exchanger  24  can be further provided, thereby increasing the heat exchange area of the heat exchangers, and then the air volume of the intake air after the heat exchange can be increased to meet the demand for refrigerating capacity during natural convection air intake. 
     Further, in the first direction, the upper end portion of the first heat exchanger  20  overlaps with the lower end portion of the second heat exchanger  22 , thereby ensuring that the air flow entering through the air inlet can be discharged after heat exchange so as to improve the heat exchange effect; the upper end portion of the third heat exchanger  24  overlaps with the lower end portion of the fourth heat exchanger  26  to ensure that the air flow entering through the air inlet on the other side can also be discharged after heat exchange to improve the heat exchange effect. 
     Further, the upper end portion of the second heat exchanger  22  and the upper end portion of the fourth heat exchanger  26  are connected via a shell such that the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  enclose to form a heat exchange chamber  16 . The air flow entering through the air inlet  12  passes through the heat exchanger group and then enters the heat exchange chamber  16 , thereby ensuring that the air entering the heat exchange chamber  16  is the air flow after heat exchange, so as to improve the heat exchange effect of the whole machine. 
     The arrangement of the above-mentioned heat exchanger is applicable to different types of heat exchangers and is not limited to a certain type of heat exchanger. 
     The specific working process is as follows: the indoor return airflow enters the shell  10  from the air inlet  12 , and passes through the heat exchange chamber  16  formed by enclosing the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26 ; due to the increased density, the cold air after cooling will flow out from the air outlet  14  and be sent into the room under the action of gravity; the hot air in the indoor will re-enter the air inlet  12  in the form of the return air, thereby forming an airflow circulation and performing heat exchange on the indoor space. Under the working mode of natural convection, with regard to the indoor unit, the fan  40  does not need to work, so as to achieve the effect of silent heat exchange and breezeless heat exchange, greatly improving the user&#39;s comfort. 
     Further, as shown in  FIG. 4 , any one heat exchanger group comprises a second heat exchanger  22  and a fourth heat exchanger  26  located in an upper portion of the shell  10 , and a first heat exchanger  20  and a third heat exchanger  24  located in a lower portion of the shell  10 . The first heat exchanger  20  and the third heat exchanger  24  are respectively located below the second heat exchanger  22  and the fourth heat exchanger  26 , and the connecting ends of the first heat exchanger  20  and the second heat exchanger  22  overlap each other via a fin, and the connecting ends of the third heat exchanger  24  and the fourth heat exchanger  26  overlap each other via a fin, and then the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  enclose to form the heat exchange chamber  16 . The first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  are all capable of performing heat exchange on the airflow entering through the air inlet  12  of the shell  10 , so as to increase the heat exchange area of the whole machine, and at the same time, capable of performing heat exchange on the indoor return air entering from the air inlet  12  in a maximum manner, and further capable of providing a great heat exchange capability for the natural convection mode in the case where the shell  10  is compact in volume, thereby greatly improving the user&#39;s comfort and satisfaction, and making it capable of satisfying the condition that the air conditioner used in a bedroom scenario offers a good body temperature when the user sleeps, without subjecting the user to the influence of blowing air and noises, that is, the air conditioner indoor unit  1  has the effects of breezeless air out and no noise, making it suitable for popularization and application. 
     Further, as shown in  FIG. 1 , it is defined that a direction along the height of the shell  10 , i.e., a direction indicated by an arrow A in the drawing, is a first direction (gravity direction), a direction along the width of the shell  10 , i.e., a direction indicated by an arrow B in the drawing, is a second direction, and a direction along the length of the shell  10 , i.e., a direction indicated by an arrow C in the drawing, is the third direction. Wherein the third direction is perpendicular to both the first direction and the second direction. 
     EMBODIMENTS 2 
     In some embodiments of the present disclosure, as shown in  FIG. 4 ,  FIG. 10 ,  FIG. 15 ,  FIG. 18 , and  FIG. 20  to  FIG. 25 , the cross-sectional shape formed a second heat exchanger  22  and a fourth heat exchanger  26  in a cross-section perpendicular to the third direction is an inverted V-shape. 
     In these embodiments, the second heat exchanger  22  and the fourth heat exchanger  26  constitute an inverted V-shape, it being understood that the above V-shape refers to a V-like shape. The V-shaped opening faces the air outlet  14  side, and a first heat exchanger  20  and a third heat exchanger  24  overlap with one side of the second heat exchanger  22  and one side of the fourth heat exchanger  26  facing the air outlet  14 , respectively. 
     Specifically, as shown in  FIG. 4 , a distance between one end of the second heat exchanger  22  near the top of the shell  10  and one end of the fourth heat exchanger  26  near the top of the shell  10  is defined as a first distance, and a distance between one end of the second heat exchanger  22  near the air outlet  14  and one end of the fourth heat exchanger  26  near the air outlet  14  is defined as a second distance. By virtue of the first distance being smaller than the second distance, i.e., by virtue of the second heat exchanger  22  and the fourth heat exchanger  26  constituting an inverted V-shaped heat exchange structure, two end sides of the open side of the V-shape are immediately provided with the first heat exchanger  20  and the third heat exchanger  24 , respectively, and the first heat exchanger  20  and the third heat exchanger  24 , in the first direction indicated by the arrow A in the figure, are located below the second heat exchanger  22  and the fourth heat exchanger  26 , respectively. 
     Specifically, after the airflow entering the shell  10  via the air inlet  12  acts on the obliquely arranged second heat exchanger  22  and fourth heat exchanger  26 , it can sink smoothly and quickly in the shell  10 . During the sinking process, it merges with the airflow entering the shell  10  via the first heat exchanger  20  and the third heat exchanger  24  and sinks together, and then flows into the room via the air outlet  14  located at the bottom of the shell  10 , that is to say, the obliquely arranged second heat exchanger  22  and fourth heat exchanger  26  enhance the effect of air sinking of the natural convection. In cooperation with the first heat exchanger  20  and the third heat exchanger  24 , the air conditioner indoor unit  1  improves the heat exchange capability and the airflow flowing to the air outlet  14  after heat exchange is made more uniform, contributing to the fact that the indoor temperature can quickly reach the user&#39;s comfort and can be maintained in a comfortable range for a long time to ensure a good heat exchange effect, such as a good refrigeration effect. 
     Specifically, when no ejection effect exists, the heat exchanger  200 ′ of the air conditioner indoor unit  1  of the related art is not obliquely arranged, i.e., the heat exchanger  200 ′ is placed along the height direction of the shell  10 . The flow of the cold air sinking, due to the slight airflow change outside, is liable to cause asymmetry and instability of the internal flow field, and the refrigerating capacity is weak.  FIGS. 26 and 27  illustrate effect drawings of temperature and velocity distribution inside a shell without jet heat exchange provided by embodiments of the related art. 
     However, in the present disclosure, the second heat exchanger  22  and the fourth heat exchanger  26  are provided obliquely with respect to the height direction of the shell  10 , the second heat exchanger  22  and the fourth heat exchanger  26  constitute an inverted V-shape, the first heat exchanger  20  and the third heat exchanger  24  are respectively provided immediately at two sides of the V-shaped opening, and the first heat exchanger  20  and the third heat exchanger  24  are located at one side of the air outlet  14  such that the heat exchanger group can generate strong natural convection refrigerating capacity.  FIGS. 24 and 25  show the effect drawings of temperature and velocity distribution inside the shell  10  in the case of no jet heat exchange provided by embodiments of the present disclosure. It can be seen from the comparison of  FIG. 24 ,  FIG. 25  and  FIG. 26 ,  FIG. 27  that in the case of no jet, the internal flow field of the air conditioner indoor unit  1  of the present disclosure is very symmetrical and uniform and is not changed by a slight airflow change in the outside, and the refrigerating capacity is improved by at least 7% compared with the prior art. 
     EMBODIMENTS 3 
     In any of the above embodiments, as shown in  FIGS. 1, 2, and 4 ,  FIGS. 8 to 10 , and  FIGS. 15 to 20 , the air conditioner indoor unit  1  further includes: a jet nozzle  34 , wherein the jet nozzle  34  is located between the upper end portion of the fourth heat exchanger  26  and the upper end portion of the second heat exchanger  22 , and the jet nozzle  34  encloses with any one heat exchanger group to form a heat exchange chamber  16 , and the heat exchange chamber  16  is in communication with the air outlet  14 . 
     In these embodiments, the air conditioner indoor unit  1  further includes a jet nozzle  34 , the jet nozzle  34  being located between the second heat exchanger  22  and the fourth heat exchanger  26  and abutting the upper end portions of the second heat exchanger  22  and the fourth heat exchanger  26  such that the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , the fourth heat exchanger  26 , and the jet nozzle  34  enclose to form the heat exchange chamber  16  communicated with the air outlet  14 . 
     Specifically, as shown in  FIGS. 21 to 23 , when the air conditioner indoor unit  1  is running, the jet nozzle  34  can inject the jet into the heat exchange chamber  16 , mix with the airflow, which enters the heat exchange chamber  16  through the air inlet  12 , the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26 , and then flow to the indoor through the air outlet  14  to realize heat exchange such that the airflow flowing into the indoor through the air outlet  14  includes two portions of airflow of both the natural convection and the jet flow. At the same time, when the jet is ejected, negative pressure can be formed in the heat exchange chamber  16 , thereby increasing the airflow volume of the natural convection, i.e., realizing the effect of joint heat exchange of the natural convection and the jet flow, and greatly improving the heat exchange capability of the indoor unit. 
     Further, as shown in  FIGS. 5, 6 to 10, and 15 to 20 , the air conditioner indoor unit  1  further includes a jet air channel  324 , wherein the jet air channel  324  is communicated with the jet nozzle  34 , and the cross-sectional area of the jet air channel  324  gradually decreases along the flow direction of the airflow in the air channel. 
     In these embodiments, as shown in  FIGS. 5 to 7 , the cross-sectional area of the jet air channel  324  gradually decreases from the air inlet end to the tail end of the jet air channel  324 , so that a relatively stable wind pressure can be maintained during the transportation of the air, and the component velocity of the air out along the length direction of the jet air channel  324  is eliminated, thereby making the air velocity ejected by each jet nozzle  34  relatively uniform. 
     Here, the shape of the jet nozzle  34  may be a circular hole, a bar-shaped hole, or a polygonal hole, and the number of the jet nozzles  34  is multiple. Alternatively, the jet nozzle  34  is an elongated opening structure that extends along a direction consistent with the jet air channel  324 . By providing a nozzle, the injection velocity of the entered airflow can be further adjusted, and then it is injected into the heat exchange chamber  16  through the jet nozzle  34 , so as to realize the function of guiding the airflow inlet by natural convection and accelerate the heat exchange efficiency. 
     Specifically, as shown in  FIGS. 7 and 8 , a fan  40  and an air supplying air channel  322  are further included, wherein an air supply port of the fan  40  is in communication with the air supplying air channel  322 , and the air supplying air channel  322  is in communication with the jet air channel  324 , so as to realize active air supply through the jet nozzle  34 . Therefore, the air sent out from air outlet  14  is composed of two parts, one part being jet air and the other part being drained air. Therefore, the effect of providing greater air volume and refrigerating capacity with a small amount of active air supply is achieved, and the energy efficiency of the air conditioner can be greatly improved when the active air supply volume maintains the air volume level of the traditional air conditioners, which is beneficial to reducing the cost of use. 
     In some specific embodiments,  FIG. 21  shows an effect drawing of the heat exchange capability calculation for the case of j et heat exchange and natural convection heat exchange as provided by some embodiments of the present disclosure; it can be seen from  FIG. 21  that the refrigerating capacity delivered to the indoor after performing jet flow through the jet air inlet  120  is 250 W, while the refrigerating capacity delivered to the indoor after the natural convection of the airflow which is drained through the main air inlet  122  is 522 W, namely, the refrigerating capacity of the drained achieved by the main air inlet  122  is about 2 times of the refrigerating capacity of the jet flow achieved by the jet air inlet  120 . 
     Further, along the airflow entering direction, the cross-sectional area of the air inlet end of the jet air channel  324  is taken as a first area, and the cross-sectional area of the tail end of the jet air channel  324  is taken as a second area, wherein the value of the second area is 10% to 80% of the first area; by adjusting the tapering amplitude of the jet air channel  324 , a reasonable structure can be set in combination with the whole machine structure of the air conditioner indoor unit  1 , and the heat exchange area of the heat exchanger, and the size of the heat exchange chamber, so as to achieve a good air-out velocity and air-out volume, and improve the output capability and comfort of the whole machine. 
     Further, the port area of the air inlet end of the overall jet nozzle  34  is a third area, the flow area of the outlet end of all the jet nozzles  34  is a fourth area, and the value of the fourth area is 50% to 95% of the third area; by setting the flow area of the jet nozzle  34  as a tapered structure from the air inlet end to the air outlet end, the flow rate of the airflow ejected out through the jet nozzle  34  can be further increased, thereby achieving the flow guiding function on the airflow of natural convection and improving the heat exchange efficiency. 
     Further, along the first direction of the shell  10 , projection is performed on a plane perpendicular to the first direction; in the obtained projection plane, the width of the heat exchanger group is equal to the difference value between the width of the shell  10  and the width of the jet nozzle  34 . 
     In these embodiments, as shown in  FIG. 1 ,  FIG. 4 , and  FIG. 15 , the sum of the width of the heat exchanger group and the width Wo of the jet nozzle  34  is equal to the width W of the shell  10  in a projection plane obtained by performing projection on a plane perpendicular to the direction of gravity. That is, the heat exchanger group and the jet nozzle  34  are closely arranged inside the shell  10  in the width direction of the shell  10 , and the inner space of the shell  10  is sufficiently utilized, which is advantageous in providing a large heat exchange capability in the case where the shell  10  is compact in volume. At the same time, the arrangement in this way is beneficial to reduce the gap between the heat exchanger group and the shell  10 , so that the airflow flowing into the inside of the shell  10  via the air inlet  12 , as much as possible, exchanges heat via the heat exchanger group and then flows out via the air outlet  14 , which is beneficial to improve the heat exchange effect of the air conditioner indoor unit, reduce energy loss, and improve the energy efficiency of the air conditioner. 
     It should be noted that, in practice and in the production process, the dimensions of the details may take into account the influence of such factors as the gap and the thickness of the shell, and that the sum of the width of the heat exchanger group and the width Wo of the jet nozzle  34  is equal to the width W of the shell  10  with a certain deviation. 
     EMBODIMENTS 4 
     In any of the above embodiments, as shown in  FIGS. 8, 9, and 10 , the shell  10  includes: an air inlet cover body  104 , wherein the air inlet  12  is opened in the air inlet cover body  104 ; a base  102 , the air inlet cover body  104  being provided on the base  102 , and the air outlet  14  being provided on the base  102 ; and a partition plate  50 , wherein the partition plate  50  is arranged between the air inlet cover body  104  and the base  102 , and the partition plate  50  is connected to the air inlet cover body  104  and the base  102 , wherein at least one heat exchanger group is connected to the partition plate  50 . 
     In these embodiments, the shell  10  of the air conditioner indoor unit  1  includes an air inlet cover body  104 , a base  102 , and a partition plate  50 . The air inlet cover body  104  is provided on the base  102 , and the air inlet  12  is opened in the air inlet cover body  104 . The air to be performed heat exchange can enter the inner side of the shell  10  via the air inlet cover body  104  to participate in heat exchange, and at the same time, the air inlet cover body  104  can also protect a heat exchanger group provided on the inner side of the shell  10 . The airflow after heat exchange by the heat exchanger group will flow to the indoor through the air outlet  14  provided in the base  102 . By providing the partition plate  50  between the air inlet cover body  104  and the base  102 , and connecting the partition plate  50  with the air inlet cover body  104  and the base  102 , the air inlet  12  can be divided into multiple independent air inlet districts, so that the airflow participating in natural convection heat exchange and the airflow air-in participating in jet heat exchange do not interfere with each other, which is beneficial to ensure a good heat exchange capability of the natural convection heat exchange and the jet heat exchange, improving the overall heat exchange capability of the air conditioner indoor unit  1 . 
     Further, as shown in  FIG. 1 ,  FIG. 4 ,  FIG. 8 ,  FIG. 10 ,  FIG. 15 ,  FIG. 16 , and  FIG. 18 , any one heat exchanger group is an axisymmetric structure whose axis of symmetry extends in the first direction. 
     In these embodiments, the first heat exchanger  20  is arranged symmetrically to the third heat exchanger  24  and the second heat exchanger  22  is arranged symmetrically to the fourth heat exchanger  26 , the axis of symmetry extending in the first direction. On the one hand, in the case where the airflow is only subjected to natural convection heat exchange through the air inlet  12  and no airflow is subjected to jet heat exchange through the jet nozzle  34 , the jet nozzle  34  has little interference on the effect of natural convection and will not cause the disturbance of airflow to flow in natural convection which leads to performance attenuation, which is beneficial to ensure a good heat exchange effect. 
     On the other hand, in the case where the airflow is subjected to jet heat exchange through a jet structure, the airflow ejected through the jet nozzle  34  can simultaneously guide the indoor airflow to flow into the inside of the shell  10  through the air inlets  12  located at two sides of the shell  10  to achieve the convective heat exchange. Compared with the related art that when the air conditioner indoor unit  1  performs jet heat exchange, the indoor airflow can only be guided from one side to enter the inside of the shell  10  for convective heat exchange, the convective airflow volume is greatly improved, thereby improving the ejection efficiency and improving the heat exchange capability of the air conditioner indoor unit  1  such that the air conditioner indoor unit  1  can meet the requirements of user comfort quickly and for a long time. 
     Further, as shown in  FIG. 4 , an included angle between the surface of the second heat exchanger  22  facing the air inlet  12  and the height direction of the shell  10  is defined as a first included angle α 1 , and the included angle between the surface of the fourth heat exchanger  26  facing the air inlet  12  and the height direction of the shell  10  is defined as a second included angle α 2 ; by reasonably setting the value ranges of the first included angle α 1  and the second included angle α 2 , on the one hand, the inclined angles of the second heat exchanger  22  and the fourth heat exchanger  26  can be reasonably set according to the cubage inside the shell  10  so as to achieve the maximization of the heat exchange area, and it is advantageous for the airflow to have a good sinking effect after flowing through the inclined second heat exchanger  22  and the fourth heat exchanger  26 ; at the same time, the second heat exchanger  22  and the fourth heat exchanger  26  are arranged to be inclined, and the inclined angles are reasonably set such that the condensed water on the second heat exchanger  22  and the fourth heat exchanger  26  flows to the bottom end along the inclined second heat exchanger  22  and the fourth heat exchanger  26 , and the condensed water of the second heat exchanger  22  and the fourth heat exchanger  26  is prevented from dropping into the indoor from the air outlet  14  and causing environmental pollution, thereby in the case of improving the heat exchange capability of the air conditioner indoor unit  1 , improving the reliability and cleanliness of the use of the product. 
     The value of the first included angle α 1  is 0° to 45°, and the value of the second included angle α 2  is 0° to 45°. 
     Specifically, the value of the first included angle α 1  can be 45°, 40°, 35° or other angles meeting the requirements; the value of the second included angle α 2  can be 45°, 40°, 35° or other angles meeting the requirements. Further, the angle values of the first included angle α 1  and the second included angle α 2  can be the same or different, so as to meet the requirements of different structures of the second heat exchanger  22 , the fourth heat exchanger  26 , and the side wall of the shell  10 , thereby expanding the range of the use of the product. 
     Further, the included angle between the surface of the first heat exchanger  20  facing the air inlet  12  and the height direction of the shell  10  is defined as a third included angle, and the included angle between the surface of the third heat exchanger  24  facing the air inlet  12  and the height direction of the shell  10  is defined as a fourth included angle; the value ranges of the third included angle and the fourth included angle are reasonably set according to the space inside the shell  10 , so as to realize the reasonable setting of the installation positions of the first heat exchanger  20  and the third heat exchanger  24 , thereby improving the utilization rate of the inner space of the shell  10  so as to provide a large heat exchange capability and improve the energy efficiency of the air conditioner in the case where the shell  10  is compact in volume. 
     Specifically, considering the problems of design and installation errors, or other problems, namely, considering a certain fault-tolerant space, by reasonably setting the third included angle and the fourth included angle, the value ranges of the third included angle and the fourth included angle are 0° to 10° such that the central planes of the first heat exchanger  20  and the third heat exchanger  24  are approximately parallel to the height of the shell  10 . 
     Then in a projection plane obtained by projecting to a plane perpendicular to the height direction, in the width direction of the shell  10 , the widths of the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  are made as equal as possible to the difference value between the width of the shell  10  and the width of the jet nozzle  34  to improve the heat exchange capability and energy efficiency of the air conditioner indoor unit  1 . 
     Specifically, the value of the third included angle may be 0°, 5°, 10° or other angles meeting the requirements; the value of the fourth included angle may be 0°, 5°, 10° or other angles meeting the requirements. Further, the angle values of the third included angle and the fourth included angle may be the same or different, so as to meet the requirements of different structures of the first heat exchanger  20 , the third heat exchanger  24 , and the side wall of the shell  10 , thereby expanding the scope of the use of the product. 
     Further, as shown in  FIG. 4 , it is sectioned along the first direction. In the cross-section, along the first direction, the height of the air inlet  12  located at one side of the top of the shell  10  is higher than the height corresponding to the first heat exchanger  20  and the second heat exchanger  22 , and the height of the air inlet  12  located at one side of the air outlet  14  is higher than the height corresponding to the first heat exchanger  20  and the second heat exchanger  22 . The distance shown by Ho in  FIG. 4  is the height of the first heat exchanger  20  and the second heat exchanger  22 , and as shown in  FIGS. 4 and 15 , the height of the air inlet  12  is Hin. The arrangement is such that the airflow entering the inside of the shell  10  through the air inlet  12  can enter the heat exchange chamber after passing through the heat exchanger group, so as to prevent the airflow entering the heat exchange chamber without passing through the heat exchanger group and thus avoiding causing return air and reducing the heat exchange capability, thereby ensuring a good heat exchange capability. 
     Further, the jet angle θ of the jet structure  30  meets the tan(θ/2) equal to the ratio of the turbulence coefficient to 0.29, wherein the turbulence coefficient ranges from 0.05 to 0.08. By reasonably limiting the value range of the turbulence coefficient and by limiting the jet angle and turbulence coefficient of the jet structure  30 , the size of the jet angle can be reasonably limited such that the jet angle matches with the air outlet  14 , which is beneficial to improve the jet performance and ensure a good heat exchange capability. 
     As shown in  FIGS. 4 and 15 , along the width direction of the shell  10 , the width of the jet nozzle  34  is defined as a first width Wo, the width of the air outlet  14  is defined as a second width Wout, and the width of the shell  10  is defined as a third width W; along the height direction of the shell  10 , the distance between the end face of the jet nozzle  34  and the plane where the air outlet  14  is located is defined as a third distance He. By limiting that the ratio of 0.5 times the difference value between the second width and the first width to the third distance is less than tan(θ/2), namely tan(θ/2)&gt;0.5(Wout−Wo)/He, the matching degree between the jet angle θ and the air outlet  14  can be improved to avoid that the jet angle is so small that the jet region cannot cover the air outlet  14 , and that the wall surface of the shell  10  around the air outlet  14  will generate condensed water due to the backflow of the airflow outside the shell  10  to affect the normal use; at the same time, it avoids that the jet angle is too large and that the jet coverage area covers the air outlet  14  too much, and that there will be many jets impacting on the wall surface on both sides of the air outlet  14  to cause performance attenuation, and therefore the reliability of the use of the product can be improved while ensuring that the jet has a good heat exchange performance. 
     Specifically, the jet angle θ is the angle that appears when the airflow naturally diffuses after being ejected through the jet nozzle  34 , i.e., the included angle between the streamline on the outer side of the fluid and the center line of the jet nozzle  34  after the airflow is ejected through a jet mouth. As shown in  FIG. 22 , the angle θ in  FIG. 22  is the jet angle.  FIG. 23  shows a capability effect drawing when the jet angle θ does not meet the above relationship, that is, when the jet angle θ is small, causing the backflow of two side wall surfaces, on the basis of the structure of the air conditioner indoor unit  1  provided by the present disclosure. Wherein, the lower portion two elliptical regions shown in  FIG. 23  cause a problem that the indoor airflow flows into the heat exchange chamber  16  through these regions as the range of the jet does not cover these regions, i.e., causing the backflow to affect the heat exchange capability. 
     Further, the ratio of the second width Wout to the third distance He ranges from 0.1 to 0.7, i.e., Wout/He equals 0.1 to 0.7. 
     Specifically, by limiting the ratio of the second width Wout to the third distance He to be within a reasonable range, the jet angle can better match the size of the air outlet  14  such that the jet region can agree with the size of the air outlet  14 , which is advantageous to improve the jet performance and ensure a good heat exchange capability. 
     Specifically, the ratio Wout/He of the second width Wout to the third distance He is 0.1, 0.3, 0.5, 0.7, or other numerical values that meet the requirements. 
     Further, the ratio of the second width Wout to the third width W ranges from 0.2 to 0.9, i.e., Wout/W equals 0.2 to 0.9. 
     Specifically, in the case where the airflow is subjected to natural convection heat exchange through the air inlet  12 , the smaller the width of the air outlet  14  is, the more seriously the heat exchange capability of the natural convection attenuates; therefore, by defining the width of the shell  10  as a third width W along the width direction of the shell  10 , and limiting the ratio of the second width Wout to the third width W within a reasonable range, namely, by reasonably limiting the width of the shell  10  and the width of the air outlet  14 , the airflow can be smoothly and quickly output to the indoor through the air outlet  14  after the airflow is subjected to heat exchange with the heat exchanger group through the air inlet  12  so as to ensure a good heat exchange capability. 
     Specifically, the ratio Wout/W of the second width Wout to the third width W may be 0.2, 0.5, 0.7, or 0.9, as well as other numerical values meeting the requirements. 
     Further, the air conditioner indoor unit  1  further comprises a first water receiving tray  60  and a second water receiving tray  62 , the first water receiving tray  60  and the second water receiving tray  62  being provided inside the shell  10 . The first water receiving tray  60  is located below the first heat exchanger  20  and used for collecting or accommodating the condensed water of the first heat exchanger  20  and the second heat exchanger  22 . The second water receiving tray  62  is located below the third heat exchanger  24  and used for collecting or accommodating the condensed water of the third heat exchanger  24  and the fourth heat exchanger  26  so as to avoid the condensed water of the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  flowing into the indoor to affect the user&#39;s normal use and to improve the reliability of the use of the product. 
     Further, the projection is performed in a direction perpendicular to the height direction along the height direction of the shell  10 . In the obtained projection plane, as shown in  FIGS. 4 and 15 , the projections of the end portions on the sides of the first heat exchanger  20  and the second heat exchanger  22  facing the air outlet  14  is located inside the projection of the first water receiving tray  60  such that it can be ensured that the condensed water of the first heat exchanger  20  and the second heat exchanger  22  can fall into the inside of the first water receiving tray  60  without leaking. Similarly, the projections of the end portions on the sides of the third heat exchanger  24  and the fourth heat exchanger  26  facing the air outlet  14  are located inside the projection of the second water receiving tray  62 . It can be ensured that the condensed water of the third heat exchanger  24  and the fourth heat exchanger  26  can fall into the inside of the second water receiving tray  62  without leaking, thereby improving the reliability and satisfaction of the customer use. 
     Further, both the first water receiving tray  60  and the second water receiving tray  62  are inclined with respect to the length direction of the shell  10 ; the included angle between the water receiving surface of the first water receiving tray  60  and the length direction of the shell  10  has a value range of greater than or equal to 3°; the included angle between the water receiving surface of the second water receiving tray  62  and the length direction of the shell  10  has a value range of greater than or equal to 3°. 
     Specifically, the first water receiving tray  60  and the second water receiving tray  62  are inclined with respect to the length direction of the shell  10 . By reasonably setting the range of the included angle between the water receiving surface of the first water receiving tray  60  and the length direction of the shell  10  and the range of the included angle between the water receiving surface of the second water receiving tray  62  and the length direction of the shell  10 , it is advantageous for the condensed water to be smoothly discharged along one ends of the first water receiving tray  60  and the second water receiving tray  62 , so as to prevent the condensed water of the first water receiving tray  60  and the second water receiving tray  62  from falling into the room because the condensed water gathers too much to be discharged in time, thereby further improving the reliability of the use of the product. 
     Specifically, the included angle between the water receiving surface of the first water receiving tray  60  and the length direction of the shell  10  is 3°, 4°, 5°, or other angles meeting the requirements. The included angle between the water receiving surface of the second water receiving tray  62  and the length direction of the shell  10  is 3°, 4°, 5°, or other angles meeting the requirements. It is to be understood that the first water receiving tray  60  and the second water receiving tray  62  may also be inclined with respect to the width direction of the shell  10 . 
     Further, the first heat exchanger  20  comprises multiple first heat exchange tubes and multiple first fins, wherein multiple first heat exchange tubes are all arranged in a single row, and multiple first fins are sleeved on the first heat exchange tubes; the second heat exchanger  22  comprises multiple second heat exchange tubes and multiple second fins, wherein multiple second heat exchange tubes are all arranged in a single row, and multiple second fins are sleeved on the second heat exchange tubes; the third heat exchanger  24  comprises multiple third heat exchange tubes and multiple third fins, wherein multiple third heat exchange tubes are all arranged in a single row, and multiple third fins are sleeved on the third heat exchange tubes; the fourth heat exchanger  26  comprises multiple fourth heat exchange tubes and multiple fourth fins, wherein multiple fourth heat exchange tubes are arranged in a single row, and multiple fourth fins are sleeved on the fourth heat exchange tubes. 
     In these embodiments, by arranging multiple first heat exchange tubes in a single row in the first heat exchanger  20 , the heat exchange performance of the first heat exchanger  20  can be effectively improved. The greater the number of the arranged first heat exchange tubes is, the more obvious the heat exchange performance is improved. Multiple first fins are sleeved on the first heat exchange tubes such that the heat of the first heat exchange tube can be uniformly distributed on the first fin. When the airflow passes through the first heat exchanger  20 , the airflow can sufficiently and uniformly exchange heat with the first heat exchanger  20  such that the temperature distribution of the airflow after heat exchange is more uniformly distributed, which is beneficial to ensure a good heat exchange effect. 
     In the case where the heat exchanger uses a finned heat exchanger, the upper end portion of the first heat exchanger  20  and the lower end portion of the second heat exchanger  22  are overlapped via a fin; the upper end portion of the third heat exchanger  24  and the lower end portion of the fourth heat exchanger  26  are also overlapped via a fin such that the intake airflow can enter the room after heat exchange. 
     By arranging multiple second heat exchange tubes in a single row in the second heat exchanger  22 , the heat exchange performance of the second heat exchanger  22  can be effectively improved. The greater the number of the arranged second heat exchange tubes is, the more obvious the heat exchange performance is improved. Multiple second fins are sleeved on the second heat exchange tubes such that the heat of the second heat exchange tube can be uniformly distributed on the second fin. When the airflow passes through the second heat exchanger  22 , the airflow can sufficiently and uniformly exchange heat with the second heat exchanger  22  such that the temperature distribution of the airflow after heat exchange is more uniform, which is beneficial to ensure a good heat exchange effect. 
     By arranging multiple third heat exchange tubes in a single row in the third heat exchanger  24 , the heat exchange performance of the third heat exchanger  24  can be effectively improved. The greater the number of the arranged third heat exchange tubes is, the more obvious the heat exchange performance is improved. Multiple third fins are sleeved on the third heat exchange tubes such that the heat of the third heat exchange tube can be uniformly distributed on the third fin. When the airflow passes through the third heat exchanger  24 , the airflow can sufficiently and uniformly exchange heat exchange with the third heat exchanger  24  such that the temperature distribution of the airflow after heat exchange is more uniform, which is beneficial to ensure a good heat exchange effect. 
     By arranging multiple fourth heat exchange tubes in a single row in the fourth heat exchanger  26 , the heat exchange performance of the fourth heat exchanger  26  can be effectively improved. The greater the number of the arranged fourth heat exchange tubes is, the more obvious the heat exchange performance is improved. Multiple fourth fins are sleeved on the fourth heat exchange tubes such that the heat of the fourth heat exchange tube can be uniformly distributed on the fourth fin. When the airflow passes through the fourth heat exchanger  26 , the airflow can sufficiently and uniformly exchange heat with the fourth heat exchanger  26  such that the temperature distribution of the airflow after heat exchange is more uniform, which is beneficial to ensure a good heat exchange effect. 
     Further, the ratio of the fin pitch of two adjacent fins in the second heat exchanger  22  and the fourth heat exchanger  26  to the fin width of a single fin ranges from 0.1 to 0.45; the ratio of the fin pitch of two adjacent fins in the first heat exchanger  20  and the third heat exchanger  24  to the fin width of a single fin ranges from 0.1 to 0.45. 
     In these embodiments, by reasonably setting the value range of the ratio of the fin pitch of two adjacent fins in the second heat exchanger  22  and the fourth heat exchanger  26  to the fin width of a single fin, and the value range of the ratio of the fin pitch of two adjacent fins in the first heat exchanger  20  and the third heat exchanger  24  to the fin width of a single fin, it is advantageous to increase the temperature difference between the temperature of the airflow entering the shell  10  through the air inlet  12  and the temperature of the airflow in the heat exchange chamber, thereby improving the natural convection effect and ensuring a good heat exchange capability. 
     Specifically, the ratio of the fin pitch of two adjacent fins in the second heat exchanger  22  and the fourth heat exchanger  26  to the fin width of a single fin is 0.1, 0.2, 0.3, 0.45, or other numerical values meeting the requirements. The ratio of the fin pitch of two adjacent fins of the first heat exchanger  20  and the third heat exchanger  24  to the fin width of a single fin is 0.1, 0.2, 0.3, 0.45, or other numerical values meeting the requirements. It will be understood that the ratio of the fin pitch of two adjacent fins in the second heat exchanger  22  and the fourth heat exchanger  26  to the fin width of a single fin may or may not be the same as the ratio of the fin pitch of two adjacent fins in the first heat exchanger  20  and the third heat exchanger  24  to the fin width of a single fin. 
     EMBODIMENTS 5 
     In some embodiments of the present disclosure, as shown in  FIG. 20 , at least one heat exchanger group comprises multiple heat exchanger groups, multiple heat exchanger groups being successively spaced apart along the second direction of the shell  10 . Any one of the heat exchanger groups is correspondingly provided with a jet nozzle  34 . 
     In these embodiments, multiple heat exchanger groups spaced apart along the second direction are arranged in the shell  10  of the air conditioner indoor unit  1 , so as to greatly improve the heat exchange capability of the air conditioner indoor unit  1 ; any heat exchanger group is correspondingly provided with a jet nozzle  34  such that multiple heat exchange chambers  16  can be formed in the shell  10  and each heat exchange chamber  16  exchanges heat by means of a combination of jet flow and natural convection. On the one hand, the heat exchange capability of the air conditioner indoor unit  1  is enhanced, and on the other hand, the airflow flowing to the indoor through the air outlet  14  is more uniform, thereby improving user comfort. 
     EMBODIMENTS 6 
     On the basis of any one of the above-mentioned embodiments, as shown in  FIGS. 8-15 , some embodiments of the present disclosure provide an air conditioner indoor unit  1 , wherein the air conditioner indoor unit  1  further comprises a fan  40  and a partition plate  50 . The partition plate  50  divides an air inlet  12  into a jet air inlet  120  and a main air inlet  122 , and the jet air inlet  120  is in communication with a jet air channel  324 . After heat exchange by a part of a first heat exchanger  20  and a third heat exchanger  24 , the air is sent into the jet air channel  324  via the fan  40  and is injected into a heat exchange chamber  16  via a jet nozzle  34 ; the air enters the heat exchange chamber  16  through the first heat exchanger  20 , the second heat exchanger  22 , the third heat exchanger  24 , and the fourth heat exchanger  26  via the main air inlet  122 . The heat exchange capability of the air conditioner indoor unit  1  is improved by two air inlet ways such that the overall heat exchange capability and energy efficiency of the air conditioner indoor unit  1  are improved. 
     The air inlet  12  is divided into a jet air inlet  120  and the main air inlet  122  by the partition plate  50  such that the airflow flowing into the inside of the shell  10  through the jet air inlet  120  and the airflow flowing into the inside of the shell  10  through the main air inlet  122  are independent and not in communication with each other, thereby ensuring that the natural convection heat exchange entering the inside of the shell  10  through the main air inlet  122  and the jet heat exchange flowing to the inside of the shell  10  through the jet air inlet  120  do not interfere with each other, which is beneficial to ensure a good heat exchange capability of the natural convection heat exchange and the jet heat exchange, improving the overall heat exchange capability of the air conditioner indoor unit  1 . 
     Specifically, as shown in  FIG. 8 , the jet air inlet  120  is in communication with the jet nozzle, and the main air inlet  122  is in communication with the heat exchange chamber  16  via at least one heat exchanger group; the jet air inlet  120  is opened on the side wall of the shell  10 ; the main air inlet  122  is opened on two side walls of the shell  10  which are opposite along the second direction; the main air inlet  122  is opened on a side wall of the shell  10  along the third direction, and/or a top wall of the shell  10 . 
     Further, in some embodiments of the present disclosure, as shown in  FIGS. 11, 12, 13, and 14 , the number of the fan  40  is one and it is provided at one end of the shell  10 . The fan  40  is located outside and installed on the shell  10 , and the air supply port of the fan  40  is in communication with the jet air channel  324  to provide airflow for jet heat exchange carried out by the operation of a jet structure  30 . The airflow entering the main air inlet  122  is as shown by an arrow E in  FIG. 12 , the airflow entering the jet air inlet  120  is as shown by an arrow D in  FIG. 12 . 
     In some embodiments of the present disclosure, as shown in  FIG. 16 ,  FIG. 17 ,  FIG. 18 , and  FIG. 19 , the number of the fans  40  is two, respectively located at two ends of the shell  10 , and the number of the partition plates  50  is two. 
     Wherein, two fans  40  are respectively located outside the shell  10  and installed on two ends of the shell  10 . The two partition plates  50  divide the air inlet  12  into one main air inlet  122  and two jet air inlets  120 . The two jet air inlets  120  are respectively located at two sides of the main air inlet  122 . 
     As shown in  FIGS. 16 and 17 , the jet air inlets  120  on two sides are communicated with the fans  40  on two sides, respectively. By providing two fans  40 , the quantity of flow of the air for jet heat exchange is increased, and then the heat exchange capability of the jet heat exchange is improved, which is beneficial for the indoor temperature to quickly reach the user&#39;s comfort and maintain in the comfort range for a long time, thereby ensuring a good heat exchange effect. 
     Further, as shown in  FIGS. 16 and 17 , the top of the shell  10  is provided with two jet structures  30 . 
     Specifically, on the one hand, under the action of the fan  40  on one side, the airflow passes through the jet air inlet  120  and the heat exchanger group on one side to enter the air channel  32  of one of the jet structures  30 , and passes through the jet nozzle  34  on the air channel  32  to enter the heat exchange chamber  16 ; on the one hand, under the action of the fan  40  on the other side, the airflow passes through the jet air inlet  120  and the heat exchanger group on the other side to enter the air channel  32  of the other jet structure  30 , and passes through the jet nozzle  34  on the air channel  32  to enter the heat exchange chamber  16 ; by providing two fans  40 , the two air channels  32  provide the airflow for the jet nozzle  34  at the same time, thereby enabling the airflow to be sufficiently, smoothly, and quickly ejected via the jet nozzle  34 , further increasing the quantity of flow of the air flowing to the inside of the shell  10  via the main air inlet  122 , ensuring a good heat exchange capability, and improving the overall heat exchange capability of the air conditioner indoor unit  1 . 
     Specifically, on the one hand, the air channels  32  of the two jet structures  30  are in communication and, on the other hand, the air channels  32  of the two jet structures  30  are separated, which expands the range of the use of the product. 
     Further, as shown in  FIGS. 16 and 17 , the heat exchange chamber  16  is divided into a first heat exchange chamber  52  opposite to the main air inlet  122  and two second heat exchange chambers  54  opposite to the jet air inlet  120  via two partition plates  50  such that the airflow flowing into the inside of the shell  10  via the main air inlet  122  and the airflow flowing into the inside of the shell  10  via the jet air inlet  120  are independent of each other and not communicated, namely, the two are short-circuited therebetween. It can ensure that the natural convection heat exchange entering the inside of the shell  10  via the main air inlet  122  and the jet heat exchange flowing to the inside of the shell  10  via the jet air inlet  120  do not interfere with each other, which is beneficial to ensure a good heat exchange capability of the natural convection heat exchange and the jet heat exchange, thereby improving the overall heat exchange capability of the air conditioner indoor unit  1 . 
     EMBODIMENTS 7 
     According to a second aspect of the present disclosure, there is provided an air conditioner, comprising the air conditioner indoor unit  1  according to any embodiment of the above first aspect. Accordingly, it has all the advantageous effects of the air conditioner indoor unit  1  of the first aspect described above which will not be described in detail herein. 
     Further, the air conditioner further comprises a control system. The control system can acquire an operating mode instruction of the air conditioner, and according to the operating mode instruction, controls the air conditioner indoor unit  1  to perform natural convection heat exchange, jet heat exchange, or natural convection heat exchange and jet heat exchange together so as to meet different needs of users and to improve the user comfort to the maximum. 
     The air conditioner indoor unit  1  provided in the present disclosure can realize the integration of the jet heat exchange mode and the natural convection heat exchange mode, and the effects of the jet heat exchange and the natural convection heat exchange can be superimposed on each other, which is not a simple effect superposition, but also can mutually improve the effect and achieve the function of a gain effect. At the same time, by optimizing the parameters of the heat exchanger group and combining with the arrangement form of the condensed water collection, it can provide a large natural convection refrigerating capacity output with a compact volume. In the operating mode of natural convection refrigeration, there is no fan noise at all, and there is no dripping of condensed water into the room. 
     Specifically, the air conditioner indoor unit  1  provided in the present disclosure can be applied to a variety of products such as a household air conditioner, a central air conditioner multiple on-line, a commercial air curtain machine, a commercial air conditioner indoor terminal, etc. 
     In the description of the present disclosure, the term “multiple” means two or more unless explicitly defined otherwise. The orientation or positional relationship indicated by the terms “upper”, “lower”, etc. is the orientation or positional relationship described based on the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present disclosure. The terms “connected”, “install”, “fixed”, and the like are to be construed broadly, e.g., “connected” may be a fixed connection, a detachable connection, or an integral connection; and may be directly connected or indirectly connected through an intermediary. For a person of ordinary skills in the art, the specific meaning of the above terms in the present disclosure can be understood according to specific situations. 
     In the description of the present disclosure, the description of the terms “one embodiment”, “some embodiments”, “specific embodiments”, etc. means that a specific feature, structure, material, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the present disclosure, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Further, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. 
     The above descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the scope of the present disclosure.