Patent Publication Number: US-2023151977-A1

Title: Portable air conditioner

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application No. PCT/CN2021/088352, filed on Apr. 20, 2021, which claims priorities to and benefits of Chinese Application No. 202010734600.6, filed on Jul. 27, 2020 and entitled “PORTABLE AIR CONDITIONER”, and Chinese Application No. 202021514119.8, filed on Jul. 27, 2020 and entitled “PORTABLE AIR CONDITIONER”, and Chinese Application No. 202011202533.X, filed on Jul. 27, 2020 and entitled “PORTABLE AIR CONDITIONER”, the entire contents of each of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the technical field of air conditioning equipment, and in particular, to a portable air conditioner. 
     BACKGROUND 
     In the related art, an air duct is generally installed to a rear end on a cabinet of a portable air conditioner. When the portable air conditioner is running, the installed air duct may obstruct an air inlet of the rear end on the cabinet, and thus has an influence on an air intake volume entering an air outlet housing. Especially, when the portable air conditioner is installed against a wall, an air resistance of the air inlet becomes significantly large, and the air intake volume will be affected, so that the heat exchange capability and the actual heat exchange effect of the portable air conditioner are decreased. 
     SUMMARY 
     The present disclosure aims at solving at least one of the technical problems in the prior art. Therefore, the present disclosure provides a portable air conditioner, which adopts a second air inlet connected to a heat exchanger on a cabinet to supplement air supply, thereby improving a heat exchange capacity and a heat exchange effect of the portable air conditioner. 
     On one hand, a portable air conditioner according to certain exemplary embodiments of the present disclosure includes a cabinet and an air outlet housing provided in the cabinet. A rear end of the cabinet is provided with a back plate. The back plate is provided with a first air inlet. The rear end of the cabinet protrudes relative to the back plate to form a rear housing. The rear housing is provided with a vent hole, and an air duct communicated with the vent hole is formed inside the rear housing. The air outlet housing is provided with an air intake hole. A heat exchanger is provided at the air intake hole. The air intake hole is in an opposite position to and communicated with the first air inlet. The vent hole is communicated with the air intake hole through the air duct. 
     The portable air conditioner according to certain exemplary embodiments of the present disclosure offers at least the following beneficial effects. 
     By adding the vent hole in the rear housing of the cabinet, and forming the air duct communicated with the vent hole in the rear housing, the air entering the vent hole is guided to the air intake hole of the air outlet housing through the air duct. Thus, air is supplemented into the first air inlet on the back plate of the cabinet. As a result, a heat exchange volume of the heat exchanger is increased, a heat exchange effect of the portable air conditioner is improved, and an air output volume of the air outlet housing is increased. 
     According to some embodiments of the present disclosure, the vent hole is provided on at least one wall surface of the rear housing in a left-right direction. 
     According to some embodiments of the present disclosure, a plurality of vent holes are provided, and the plurality of vent holes are distributed on at least one of a rear wall surface and an upper wall surface of the rear housing. 
     According to some embodiments of the present disclosure, a dimension of the vent hole in a width direction is d, and d meets the conditions that: d≥20 mm, or 0&lt;d≤8 mm. 
     According to some embodiments of the present disclosure, the portable air conditioner further includes an air duct. The air duct is mounted at an upper end of the rear housing, and the vent holes are arranged at an interval along a periphery of the air duct. 
     According to some embodiments of the present disclosure, the portable air conditioner further includes a middle plate. The middle plate is arranged in the cabinet, and the air duct is formed between the middle plate and the rear housing. 
     According to some embodiments of the present disclosure, the portable air conditioner further includes an air deflector located in the rear housing. The air deflector is respectively connected to the middle plate and the air duct in either end, an outer wall of the air deflector is in a streamlined shape, and the air duct is formed among the air deflector, the middle plate and the rear housing. 
     According to some embodiments of the present disclosure, the first air inlet is detachably connected to a first filter assembly, and the first filter assembly is used for filtering air entering the first air inlet. 
     According to some embodiments of the present disclosure, a second air inlet located in the air duct is formed in the cabinet, the second air inlet is located below the first air inlet, and the second air inlet is connected to a second filter assembly, and the second filter assembly is used for filtering air entering the vent hole. 
     According to some embodiments of the present disclosure, the second filter assembly and the first filter assembly are in a fixed connection. 
     According to some embodiments of the present disclosure, a positioning frame is arranged in the cabinet, the positioning frame is located at the second air inlet, and the positioning frame is provided with a positioning groove matched with the second filter assembly. 
     On the other hand, a portable air conditioner according to certain exemplary embodiments of the present disclosure includes a cabinet and an air outlet housing mounted in the cabinet. The cabinet includes an upper housing and a lower housing. The upper housing is provided with a first air inlet. The lower housing is arranged in a backwardly protruding way relative to the upper housing, and the lower housing is provided with a second air inlet. A heat exchanger is mounted on the air outlet housing at an air intake side. The first air inlet is communicated with the heat exchanger and forms a first air intake channel. The second air inlet is communicated with the heat exchanger and forms a second air intake channel. 
     The portable air conditioner according to certain exemplary embodiments of the present disclosure offers at least the following beneficial effects. 
     By adding the second air inlet in the lower housing of the cabinet, and forming the second air intake channel communicated with the second air inlet in the cabinet, the air entering the second air inlet is guided into the heat exchanger to supplement air to the first air inlet of the cabinet. Thus, a heat exchange air volume of the heat exchanger is increased, a heat exchange effect of the portable air conditioner is improved, and an air output volume of the air outlet housing is increased. 
     According to some embodiments of the present disclosure, the second air inlet is located on the top wall, the top wall is provided with a mounting part for fixing an air duct, and the second air inlet is arranged along a periphery of the mounting part. 
     According to some embodiments of the present disclosure, the second air inlet includes a plurality of through holes in a uniform arrangement. 
     According to some embodiments of the present disclosure, the second air inlet is located on the top wall, and arranged along a periphery of the mounting part. 
     According to some embodiments of the present disclosure, a diameter of a largest inscribed circle inside the second air inlet is d, and d meets the conditions that: 0&lt;d≤8 mm. 
     According to some embodiments of the present disclosure, the portable air conditioner further includes a middle plate. The middle plate is arranged in the cabinet, the second air intake channel is formed between the middle plate and the lower housing, and the second air inlet is located above the middle plate. 
     According to some embodiments of the present disclosure, the portable air conditioner further includes an air deflector located in the lower housing. An upper part of the lower housing is provided with a mounting part used for fixing an air duct, the air deflector is respectively connected to the middle plate and the mounting part in either end, and the second air intake channel is formed among the air deflector, the middle plate and the lower housing. 
     According to some embodiments of the present disclosure, the first air inlet is detachably connected to a first filter assembly, and the first filter assembly is used for filtering air entering the first air inlet. 
     According to some embodiments of the present disclosure, the lower housing is provided with a second filter assembly inside, and the second filter assembly is located at the second air intake channel for filtering air entering the second air inlet. 
     According to some embodiments of the present disclosure, the second filter assembly and the first filter assembly are formed in an integrated piece. 
     Additional features and advantages of the present disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present disclosure. 
     Additional features and advantages of the present disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The above and/or additional aspects and advantages of the present disclosure will be more apparent from the following description of certain exemplary embodiments in conjunction with the accompanying drawings, where: 
         FIG.  1    is a schematic diagram of a portable air conditioner according to one embodiment of the present disclosure; 
         FIG.  2    is a partial enlarged view of  FIG.  1   ; 
         FIG.  3    is a top view of  FIG.  1   ; 
         FIG.  4    is a sectional view from a section A-A in  FIG.  3   ; 
         FIG.  5    is a schematic diagram of a portable air conditioner according to one embodiment of the present disclosure, with a cabinet and an air duct disassembled; 
         FIG.  6    is a partial enlarged view of  FIG.  5   ; 
         FIG.  7    is a schematic diagram of a first filter assembly and a second filter assembly in  FIG.  5   ; 
         FIG.  8    is a schematic structural diagram of a cabinet and a middle plate of a portable air conditioner according to one embodiment of the present disclosure; 
         FIG.  9    is a schematic structural diagram of a cabinet and a middle plate of a portable air conditioner according to another embodiment of the present disclosure; 
         FIG.  10    is a schematic diagram of a portable air conditioner according to another embodiment of the present disclosure; 
         FIG.  11    is a partial enlarged view of  FIG.  10   ; 
         FIG.  12    is a schematic structural diagram of a cabinet and a middle plate of a portable air conditioner according to one embodiment of the present disclosure; 
         FIG.  13    is a top view of  FIG.  10   ; 
         FIG.  14    is a sectional view from a section A-A in  FIG.  13   ; 
         FIG.  15    is a schematic diagram of a portable air conditioner according to one embodiment of the present disclosure, with a cabinet and an air duct disassembled; and 
         FIG.  16    is a schematic diagram of a first filter assembly and a second filter assembly in  FIG.  15   . 
     
    
    
     Reference numerals shown in the figures are described as follows: 
     
       
         
           
               
               
               
               
               
               
             
               
                   
               
             
            
               
                 100 
                 cabinet; 
                 110 
                 back plate; 
                 110′ 
                 upper housing; 
               
               
                 111 
                 first air inlet; 
                 120 
                 vent hole; 
                 120′ 
                 lower housing; 
               
               
                 121 
                 second air inlet; 
                 122 
                 mounting part; 
                 130 
                 air duct; 
               
               
                 130′ 
                 top wall; 
                 140 
                 rear housing; 
                 140′ 
                 surrounding wall; 
               
               
                 150 
                 first filter assembly; 
                 151 
                 buckle; 
                 152 
                 mounting frame; 
               
               
                 153 
                 grid; 
                 160 
                 second air inlet; 
               
               
                 160′, 170 
                 second filter assembly; 
               
               
                 200 
                 air outlet housing; 
                 210 
                 air intake hole; 
                 220 
                 air outlet hole; 
               
               
                 300 
                 heat exchanger; 
               
            
           
           
               
               
               
               
               
            
               
                 400 
                 air supply mechanism; 
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 500 
                 air duct; 
                   
                   
                   
                   
               
               
                 600 
                 middle plate; 
                 610 
                 positioning frame; 
                 611 
                 guide part; 
               
            
           
           
               
               
               
               
               
            
               
                 612 
                 positioning groove; and 
                   
                   
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 700 
                 air deflector. 
               
               
                   
               
            
           
         
       
     
     DETAILED DESCRIPTION 
     Certain exemplary embodiments of the disclosure will be described in detail hereinafter. Examples of the embodiments are shown in the accompanying drawings. The same or similar reference numerals throughout the drawings represent the same or similar elements or elements having the same or similar functions. The exemplary embodiments described below with reference to the accompanying drawings are exemplary and are only intended to explain the present disclosure, but should not be understood as limitation on the present disclosure. 
     In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms relating orientation description such as “upper”, “lower”, “right” and the like is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing and simplifying the present disclosure, and does not indicate or imply that the indicated device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms should not be construed as limiting the present disclosure. 
     In the description of the present disclosure, the term of “first” and “second” are used for the purpose of distinguishing the technical features only, and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated thereby, or implicitly indicating the order of technical features indicated thereby. 
     In the description of the present disclosure, unless otherwise explicitly defined, words such as “setting/set”, “installing/installed” and “connecting/connected” should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present disclosure in combination with the specific contents of the technical solutions. 
     Referring to  FIG.  1    and  FIG.  4   , a portable air conditioner according to one embodiment of the present disclosure includes a cabinet  100  and an air outlet housing  200 . The air outlet housing  200  is mounted in the cabinet  100 , and the air outlet housing  200  is provided with an air intake hole  210  and an air outlet hole  220 . A heat exchanger  300  is mounted at the air intake hole  210 , and the air outlet housing  200  is mounted with an air supply mechanism  400  at the air outlet hole  220 . Referring to  FIG.  8   , a rear end of the cabinet  100  is provided with a back plate  110 , and the back plate  110  is provided with a first air inlet  111 . The first air inlet  111  is in an opposite position to and communicated with the air intake hole  210 . The first air inlet  111  is communicated with an external environment. The first air inlet  111  is a main air inlet of the portable air conditioner, and is used for air in the external environment to enter the heat exchanger  300  for heat exchange. When the portable air conditioner is running for refrigeration, a wind wheel in the air outlet housing  200  rotates, driving the air to enter the cabinet  100  from the first air inlet  111 , and exchanging heat through the heat exchanger  300 . The air after heat exchange is blown out from the air supply mechanism  400  under the guidance of the wind wheel to adjust a temperature of the external environment. 
     Referring to  FIG.  1    and  FIG.  2   , a portable air conditioner according to one embodiment of the present disclosure has a cabinet  100  provided with a rear housing  140 , the rear housing  140  is formed by a rear end of the cabinet  100  protruding relative to a back plate  110 , and the rear housing  140  and the first air inlet  111  are separated from each other in an up-down direction. The rear housing  140  is provided with a vent hole  120 , the vent hole  120  may be provided in one or more elongated structures, and the elongated structures may be extended in a horizontal direction or in a vertical direction, which is not specifically limited here. In addition, a plurality of vent holes  120  may be provided, and the plurality of vent holes  120  are combined to form a grid structure, and are not specifically limited here. Referring to  FIG.  3    and  FIG.  4   , an air duct  130  communicated with the vent hole  120  is formed in the cabinet  100 , and the air duct  130  is connected to the vent hole  120  and the air intake hole  210  respectively in either end, so that an air volume supplemented by the vent hole  120  is guided into the air outlet housing  200 , thereby enhancing a heat exchange efficiency of the heat exchanger  300 , improving a heat exchange effect of the portable air conditioner, increasing an air output volume of the air supply mechanism  400 , and improving user experience. Moreover, when the portable air conditioner is mounted against a wall, because the first air inlet  111  is blocked by a wall surface or an air duct  500  located behind the back plate  110 , an effective air intake area is smaller and an air inlet volume is decreased. In this case, the vent hole  120  can play a role in supplementing an air volume, and improving a capacity and actual cooling and heating effects of the portable air conditioner. 
     In some embodiments of the present disclosure, the air duct  130  is defined between internal structures of the cabinet  100 , and the air duct  130  may be arranged in such a way that each vent hole  120  is independently provided with one air duct  130 , or the plurality of vent holes  120  share one air duct  130 . 
     Referring to  FIG.  4    and  FIG.  5   , in some embodiments of the present disclosure, the portable air conditioner further includes a middle plate  600 . The middle plate  600  is arranged in the cabinet  100 , and a cavity for containing the air outlet housing  200  is formed between the middle plate  600  and the cabinet  100 . The air outlet housing  200  is mounted on the middle plate  600 , and a sealed cavity is formed between the middle plate  600  and the rear housing  140 . The cavity defines an air duct  130  communicated with the vent hole  120  and the air intake hole  210 , so that the air duct  130  has a satisfactory sealing performance; and an air intake flow of the air intake hole  120  can be prevented from diffusion in the cabinet  100 , preventing a loss of air volume of the intake air. In addition, the vent hole  120  introduces the supplemented air intake flow into the air outlet housing  200  through the sealed air duct  130 , thereby improving the heat exchange efficiency of the portable air conditioner. 
     Referring to  FIG.  4   ,  FIG.  5    and  FIG.  6   , in some embodiments of the present disclosure, the portable air conditioner further includes an air deflector  700  located in the rear housing  140 , and the air deflector  700  is connected to the middle plate  600  and the air duct  500  respectively in either end, so that an air intake duct for heat exchange between the portable air conditioner and an outdoor environment is isolated and sealed from the air duct  130 , thereby avoiding channeling between the two ducts and influences on an air supply effect of the air supply mechanism  400 . In addition, as shown in  FIG.  8    and  FIG.  9   , an outer wall of the air deflector  700  is formed in a streamlined shape, and the air duct  130  is formed among the air deflector  700 , the middle plate  600  and the rear housing  140 , so that the resistance of the air duct  130  is smaller, the air intake is smoother, the heat exchange efficiency of the heat exchanger  300  is enhanced, the heat exchange efficiency of the portable air conditioner is improved, and air intake noise is effectively reduced. 
     Referring to  FIG.  1    and  FIG.  2   , for the sake of overall structural aesthetics, the air duct  500  is generally mounted at an upper end of the rear housing  140  and located at a rear end of the back plate  110 , which may block the first air inlet  111  on the back plate  110  to some extent, thereby affecting the air intake of the air outlet housing  200 . Therefore, by arranging the vent holes  120  at an interval along a periphery of the air duct  500 , the air intake volume can be further increased near the first air inlet  111 , and the intake air volume of the air outlet housing  200  can be effectively increased, thereby improving the heat exchange efficiency of the portable air conditioner. Moreover, the layout of the vent holes  120  is more compact, which makes the structure of the portable air conditioner more compact. In addition, the vent holes  120  may be arranged on a wall surface of the rear housing  140  in a left-right direction. It may be understood that the vent holes  120  may be arranged on a left side wall surface, a right side wall surface or both left and right side wall surfaces of the rear housing  140 . The vent holes  120  are arranged on the side wall, so that the influence of the air duct  500  on the vent holes  120  can be reduced, and an air supply effect of the vent holes  120  can be ensured. 
     With reference to  FIG.  2   , in order to further improve the air intake effect, a plurality of vent holes  120  may be provided, and the plurality of vent holes  120  are distributed on the rear wall surface and upper wall surface or other side walls of the rear housing  140 , thereby further improving the air supply effect and the heat exchange effect of the portable air conditioner. 
     With reference to  FIG.  2   , in one embodiment of the present disclosure, a dimension of the vent hole  120  in a width direction is d, and d meets the conditions that: d≥20 mm. It should be noted that the dimension d of the vent hole  120  in the width direction refers to a minimum diameter or a length of a shorter side of the vent hole  120 . When the above dimension is met, the air intake resistance of the vent hole  120  is less and the air intake is smoother, and the vent hole  120  can facilitate a user to clean a structure inside the vent hole  120 . 
     With reference to  FIG.  2   , in another embodiment of the present disclosure, a dimension d of the vent hole  120  in a width direction satisfies that: 0&lt;d≤8 mm. When the above dimension is met, the vent hole  120  can prevent foreign matters from falling into the cabinet  100  via the vent hole  120  and damage to the operation of the portable air conditioner, and thus facilitate cleaning the side wall of the rear housing  140 . 
     Referring to  FIG.  7    and  FIG.  8   , in some embodiments of the present disclosure, the first air inlet  111  is detachably connected to a first filter assembly  150 , and the first filter assembly  150  is connected to the back plate  110  through a buckle  151 . A plurality of buckles  151  may be provided and the plurality of buckles  151  are arranged along a circumferential direction of the first filter assembly  150 . To facilitate the insertion of the first filter assembly  150 , installed from up to down, a lower end of the first filter assembly  150  is not provided with a buckle  151  generally. The first filter assembly  150  may also be mounted on the back plate  110  in other ways convenient for demounting, such as bolts. It should be noted that the first filter assembly  150  covers the first air inlet  111 , filters the air entering the first air inlet  111 , prevents the air from polluting the heat exchanger  300 , and improves quality of the air blown by the air supply mechanism  400 . Thus, the user experience can be improved. 
     Referring to  FIG.  4    and  FIG.  9   , in some embodiments of the present disclosure, a second air inlet  160  located in the air duct  130  is further formed in the cabinet  100 . The second air inlet  160  is formed between the middle plate  600  and the rear housing  140 , and the second air inlet  160  is located below the first air inlet  111 . In order to prevent the air intake flow of the vent hole  120  from polluting a surface of the heat exchanger  300 , a second filter assembly  170  is also arranged at the second air inlet  160 , and the second filter assembly  170  filters the air intake flow of the vent hole  120 , thereby preventing the heat exchanger  300  from being polluted by the supplemented intake air and improving the quality of the air blown by the air supply mechanism  400 . Thus, the user experience can be improved. 
     Referring to  FIG.  5    and  FIG.  8   , in some embodiments of the present disclosure, the second filter assembly  170  is fixedly connected to the first filter assembly  150 , and a user can disassemble the second filter assembly  170  and the first filter assembly  150  at the same time, and the second filter assembly  170  can be pulled up through the first air inlet  111  like the first filter assembly  150 , so that the user can disassemble and clean the second filter assembly  170  more conveniently. It may be understood that the second filter assembly  170  and the first filter assembly  150  may be constructed as an integrated piece, and the second filter assembly  170  is formed by extending the first filter assembly  150  downwardly, which can also facilitate the user to disassemble the first filter assembly  150  and the second filter assembly  170  at the same time. 
     Referring to  FIG.  7   , in some embodiments of the present disclosure, the first filter assembly  150  includes a mounting frame  152  and a filter screen, and the mounting frame  152  is provided with a structure detachably connected to the cabinet  100 , such as a buckle  151 . The mounting frame  152  is also formed with a groove for accommodating a filter screen, and the filter screen may be fixed in the groove. The filter screen may also be fixed on the mounting frame  152  by bonding, screwing, or the like, which is not specifically limited here. It should be noted that a surface of the mounting frame  152  is provided with a grid  153 , and the air enters the filter screen through the grid  153  for filtration. The filtered air subsequently enters the heat exchanger  300  for heat exchange, which can effectively block dust and other particles in the air and prevent impurities from accumulating on the surface of the heat exchanger  300 , thereby affecting the heat exchange efficiency of the heat exchanger  300 . 
     Referring to  FIG.  5    and  FIG.  6   , in some embodiments of the present disclosure, the middle plate  600  is provided with a positioning frame  610 , the positioning frame  610  is located in the cabinet  100  and the positioning frame  610  is located at the second air inlet  160  for positioning the second filter assembly  170 . Furthermore, the positioning frame  610  is further provided with a guide part  611 , the guide part is  611  is used for guiding the air duct  130  to the second air inlet  160 , so that the supplemented air intake flow passing through the air duct  130  is filtered by the second filter assembly  170 , thereby ensuring cleanliness of the supplemented air intake flow when entering the heat exchanger  300 . In some cases of this embodiment, the positioning frame  610  is provided with a positioning groove  612  matched with the second filter assembly  170 , and the second filter assembly  170  is mounted in the positioning groove  612 , so that the mounting is more stable; moreover, the positioning groove  612  has a certain guiding function, which is convenient for the second filter assembly  170  to slide and disassemble, thereby improving the user experience. 
     Referring to  FIG.  10   ,  FIG.  13    and  FIG.  14   , a portable air conditioner according to one embodiment of the present disclosure includes a cabinet  100  and an air outlet housing  200 . The air outlet housing  200  is mounted in the cabinet  100 , and the air outlet housing  200  is provided with an air intake hole  210  and an air outlet hole  220 . A heat exchanger  300  is mounted at the air intake hole  210 , and the air outlet housing  200  is mounted with an air supply mechanism  400  at the air outlet hole  220 . A wind wheel is mounted in the air outlet housing  200 . The wind wheel drives air in an indoor environment to pass through the heat exchanger  300 . The heat exchanger  300  exchanges heat with the air to cool or heat the air. The air after heat exchange enters the air outlet housing  200  and is blown out to the indoor environment by the air supply mechanism  400 , so as to adjust a temperature of the indoor environment. 
     Referring to  FIG.  10    and  FIG.  12   , the cabinet  100  includes an upper housing  110 ′. The upper housing  110 ′ is provided with a first air inlet  111 , and the first air inlet  111  is communicated with an external environment. The first air inlet  111  is a main air inlet of the portable air conditioner, and is used for air in the external environment to enter the heat exchanger  300  for heat exchange. When the portable air conditioner is running for refrigeration, a wind wheel in the air outlet housing  200  rotates, driving the air to enter the cabinet  100  from the first air inlet  111 , and exchanging heat through the heat exchanger  300 . The air after heat exchange is blown out from the air supply mechanism  400  under the guidance of the wind wheel to adjust a temperature of the external environment. 
     Referring to  FIG.  10   ,  FIG.  11    and  FIG.  12   , a portable air conditioner according to one embodiment of the present disclosure has a cabinet  100  provided with a lower housing  120 ′. The lower housing  120 ′ and the upper housing  110 ′ may be manufactured by an integrated molding method, such as integrated injection molding. The lower housing  120 ′ is arranged by protruding backwardly relative to the upper housing  110 ′, and an upper part of the lower housing  120 ′ is provided with a mounting part  122  for fixing the air duct  500 . Because a mounting position of the air duct  500  of the portable air conditioner in this embodiment is fixed behind the first air inlet  111 , the air duct  500  will block a part of the first air inlet  111 , thereby influencing an air intake volume of the portable air conditioner. In order to increase the intake air volume of the portable air conditioner, the lower housing  120 ′ is provided with a second air inlet  121 . It may be understood that the second air inlet  121  is located below the first air inlet  111  and arranged separately. The second air inlet  121  is communicated with the external environment, and may be used as an auxiliary air inlet of the portable air conditioner. The second air inlet  121  is communicated with the heat exchanger  300 , and a second air intake channel is formed, which serves as a supplemented air intake channel of the air outlet housing  200 , and is used for supplying supplemented air from the external environment into the heat exchanger  300  for heat exchange. The second air inlet  121  and the mounting part  122  are staggered, so that the air duct formed by the connection between the mounting part  122  and the air duct  500  and the second air intake channel are isolated from each other, thereby preventing channeling to affect the heat exchange efficiency. 
     As shown in  FIG.  13    and  FIG.  14   , the supplemented air volume from the second air inlet  121  is guided into the air outlet housing  200  through the second air intake channel, so that the heat exchange efficiency of the heat exchanger  300  is enhanced, the heat exchange effect of the portable air conditioner is improved, and the air supply volume of the air supply mechanism  400  is increased, which improves the user experience. Moreover, when the portable air conditioner is mounted against a wall, because the first air inlet  111  is blocked by a wall surface or the air duct  500 , an effective air inlet area is smaller and an air inlet volume is less. In this case, the second air inlet  121  plays a role in supplementing the air volume, which improves the capacity and the actual heat exchange effect of the portable air conditioner. 
     It may be understood that the second air intake channel is defined between the internal structures of the cabinet  100 , and the second air intake channel may be arranged in such a way that each second air inlet  121  is independently provided with one second air intake channel, or the plurality of second air inlets  121  share one second air intake channel, which is not specifically limited here. 
     Referring to  FIG.  12    and  FIG.  14   , in some embodiments of the present disclosure, the portable air conditioner further includes a middle plate  600 . The middle plate  600  is arranged in the cabinet  100 , and a cavity for containing the air outlet housing  200  is formed between the middle plate  600  and the cabinet  100 . The air outlet housing  200  is mounted on the middle plate  600 , and the second air inlet  121  is located above the middle plate  600 . A second air intake channel communicating the second air inlet  121  with the heat exchanger  300  is defined between the middle plate  600  and the lower housing  120 ′, so that the second air intake channel has good sealing performance, and the air flow of the second air inlet  121  can be prevented from blowing in the cabinet  100 , thereby reducing the air intake volume loss of the second air intake channel. In addition, the second air inlet  121  introduces the supplemented air intake flow into the air outlet housing  200  through the sealed second air intake channel, thereby improving the heat exchange efficiency of the portable air conditioner. 
     Referring to  FIG.  14    and  FIG.  15   , in some embodiments of the present disclosure, the portable air conditioner further includes an air deflector  700 . The air deflector  700  is located in the lower housing  120 ′, and the air deflector  700  is connected to the middle plate  600  and the mounting part on the lower housing  120 ′ used for mounting the air duct  500  respectively in either end, so that an air intake duct for heat exchange between the portable air conditioner and an outdoor environment is isolated and sealed from the second air intake channel, thereby avoiding channeling between the two ducts that affects an air supply effect of the air supply mechanism  400 . In addition, as shown in  FIG.  15   , an outer wall of the air deflector  700  is formed in a streamlined shape, and the second air intake channel is formed among the air deflector  700 , the middle plate  600  and the lower housing  120 ′, so that the resistance of the second air intake channel is less, the air intake is smoother, the heat exchange efficiency of the heat exchanger  300  is enhanced, the heat exchange efficiency of the portable air conditioner is improved, and air intake noises can be effectively reduced, making the portable air conditioner run more stably and silently. 
     Referring to  FIG.  10    and  FIG.  11   , the lower housing  120 ′ includes a top wall  130 ′ and a surrounding wall  140 ′, and the surrounding wall  140 ′ is arranged around a left end, a rear end and a right end of the top wall  130 ′. It may be understood that the second air inlet  121  is located in the surrounding wall  140 ′, that is, the second air inlet  121  may be arranged on a left side wall surface, a right side wall surface, or both left and right side wall surfaces or a rear side wall surface of the surrounding wall  140 ′, or all the wall surfaces of the surrounding wall  140 ′. The second air inlet  121  is arranged on the surrounding wall  140 ′, which can reduce the influence of the air duct  500  on the second air inlet  121  and ensure the supplemented air volume effect of the second air inlet  121 . 
     As shown in  FIG.  11   , the second air inlet  121  includes a plurality of through holes arranged in a uniform arrangement, and shapes of the through holes are not particularly limited, as long as an aperture size needed by the air intake is met. The plurality of through holes can increase the supplemented air volume and improve the heat exchange effect of the portable air conditioner. In one embodiment, the second air inlet  121  includes one or more elongated holes, and the elongated holes may extend in a horizontal direction or in a vertical direction, which is not specifically limited here. The plurality of elongated holes are uniformly arranged on the surrounding wall  140 ′, or arranged on the surrounding wall  140 ′ in an array, which is not specifically limited here. In addition, the second air inlet  121  includes a plurality of circular holes or polygonal holes which are uniformly arranged on the surrounding wall  140 ′. 
     It may be understood that, in order to further increase the air intake effect, the air duct  500  is generally mounted on a top wall  130 ′, which may block the first air inlet  111  of the upper housing  110 ′ to a certain extent, thereby affecting the air intake of the air outlet housing  200 . Therefore, by arranging the second air inlet  121  on the top wall  130 ′ and along a periphery of the mounting part  122 , the air intake volume can be further increased near the first air inlet  111 , the air intake volume of the air outlet housing  200  can be effectively increased, and channeling with the air duct  500  can be avoided, which improves the heat exchange efficiency of the portable air conditioner. 
     With reference to  FIG.  11   , in one embodiment of the present disclosure, a dimension of the second air inlet  121  provided on the top wall  130 ′ needs to meet certain requirements, for example, a diameter of a largest inscribed circle inside the second air inlet  121  is d, and d meets the conditions that: 0&lt;d≤8 mm. It should be noted that, in the solution of this embodiments of the present disclosure, the diameter of the largest inscribed circle inside the second air inlet  121  is d, and here, the largest inscribed circle may be understood as the largest inscribed circle that can be formed by an outer contour track of each through hole corresponding to the second air inlet  121 . 
     For example, when the second air inlet  121  is an elongated hole, d refers to a length of the shorter side of the elongated hole; when the second air inlet  121  is a circular hole, d refers to a diameter of the circular hole. When d meets the above parameter requirements, foreign matters can be prevented from falling into the cabinet  100  from the second air inlet  121  and damage to the operation of the portable air conditioner, thereby facilitating the cleaning of the lower cabinet  120 ′ and meeting the requirements of safety regulations. 
     Referring to  FIG.  15    and  FIG.  16   , in some embodiments of the present disclosure, the first air inlet  11  is detachably connected to a first filter assembly  150 , and the first filter assembly  150  is connected to the upper housing  110 ′ through the buckle  151 . A plurality of buckles  151  may be provided, and the plurality of buckles  151  are arranged along a circumferential direction of the first filter assembly  150 . The first filter assembly  150  may also be mounted on the upper housing  110 ′ in other convenient ways, such as bolts. It should be noted that the first filter assembly  150  covers the first air inlet  111 , filters the air entering the first air inlet  111 , prevents the air from polluting the heat exchanger  300 , and improves the quality of the air blown by the air supply mechanism  400 . Thus, the user experience is improved. 
     Referring to  FIG.  14    and  FIG.  15   , in some embodiments of the present disclosure, in order to prevent a surface of the heat exchanger  300  from being polluted by an air intake flow of the second air inlet  121 , a second filter assembly  160 ′ is arranged in the lower housing  120 ′. The second filter assembly  160 ′ is located in the second air intake channel, and the second filter assembly  160 ′ filters the air intake flow of the second air inlet  121  to prevent the heat exchanger  300  from being polluted by supplemented intake air. Moreover, the quality of the air blown out by the air supply mechanism  400  can also be improved, and the user experience is improved. 
     Referring to  FIG.  15    and  FIG.  16   , in some embodiments of the present disclosure, the second filter assembly  160 ′ is fixedly connected to the first filter assembly  150 , and a user can disassemble the second filter assembly  160 ′ and the first filter assembly  150  at the same time, and the second filter assembly  160 ′ can be pulled up through the first air inlet  111  like the first filter assembly  150 , so that the second filter assembly  160 ′ is more convenient to disassemble and clean by the user. To facilitate the insertion of the first filter assembly  150  and the second filter assembly  160 ′, installed or removed together from up to down, a lower end of the first filter assembly  150  is not provided with a buckle  151  which is matched with the upper housing  110 ′ generally. It may be understood that the second filter assembly  160 ′ and the first filter assembly  150  may be constructed as an integrated piece, for example, by integrated injection molding. The second filter assembly  160 ′ is formed by extending the first filter assembly  150  downwardly, which can also facilitate the user to disassemble the first filter assembly  150  and the second filter assembly  160 ′ at the same time. 
     In one embodiment, referring to  FIG.  16   , in some embodiments of the present disclosure, the first filter assembly  150  includes a mounting frame  152  and a filter screen, and the mounting frame  152  is provided with a structure detachably connected to the cabinet  100 , such as a buckle  151 , which is convenient for disassembling and cleaning, and more convenient for the user to operate. The mounting frame  152  is also formed with a groove for accommodating a filter screen, and the filter screen may be fixed in the groove. The filter screen may also be fixed on the mounting frame  152  by bonding, screwing, or the like, which is not specifically limited here. It should be noted that a surface of the mounting frame  152  is provided with grids  153 , and grid holes are formed between the grids  153 . Before the air enters the first air intake channel in the upper housing  110 ′ through the grid holes on the mounting frame  152 , the air needs to be filtered by the filter screen, and then the filtered air enters the heat exchanger  300  for heat exchange, which can effectively block dust and other particles in the air and prevent impurities from accumulating on the surface of the heat exchanger  300 , thereby improving the heat exchange efficiency of the heat exchanger  300 . 
     The exemplary embodiments of the present disclosure have been described in detail above with reference to the drawings, but the present disclosure is not limited to the above embodiments, and various changes can be made without departing from the purpose of the present disclosure within the scope of knowledge possessed by those of ordinary skills in the art.