Patent Publication Number: US-11655998-B2

Title: Panel assembly for air conditioner and window air conditioner

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a National Stage Entry under 35 U.S.C. § 371 of International Application No. PCT/CN2019/080149, filed on Mar. 28, 2019, which is based on and claims priority to Chinese Patent Application Serial No. 201920188030.8, No. 201910108803.1, and No. 201920188048.8, all filed on Feb. 3, 2019, the entire contents of all of which are incorporated herein by reference. 
     FIELD 
     The disclosure relates to a field of air conditioning technology, in particular to a panel assembly of an air conditioner and a window air conditioner. 
     BACKGROUND 
     In related art, an unreasonable arrangement of an air outlet of an air conditioner results in direct air blowing towards users, which makes people feel uncomfortable, and a flow path of air in the air conditioner is relatively long, causing large air flow loss. In addition, because the air conditioner generally has a large air inlet, a face frame of the air conditioner is prone to deform, affecting the usage and appearance. 
     SUMMARY 
     The present disclosure seeks to solve at least one of the technical problems existing in the related art. Therefore, one objective of the present disclosure is to propose a panel assembly for an air conditioner, and the panel assembly can increase an air blowing distance and an air output area and can prevent deformation of a face frame. 
     The present disclosure also proposes a window air conditioner having the panel assembly mentioned above. 
     According to embodiments of a first aspect of the present disclosure, the panel assembly includes: a face frame formed with an air inlet and an air outlet, the air outlet being located above the air inlet, a plane where the air outlet is located being configured as an air outlet surface, and the air outlet surface extending obliquely backward in a direction from bottom to top; an air inlet panel provided at the air inlet and having a mesh shape, a plurality of air intake holes being distributed in the air inlet panel; and a reinforcing support having a hollow structure, provided at the air inlet, and located at an inner side of the air inlet panel, the reinforcing support being connected with the face frame. 
     With the panel assembly according to the embodiments of the present disclosure, with the air outlet being arranged above the air inlet and configuring the air outlet surface of the air outlet to extend obliquely backward in the direction from bottom to top, the length of the air channel can be reduced when the panel assembly is applied to the air conditioner, thereby shortening the length of the flow path in the air channel and reducing the air flow loss; the air blowing distance can be increased; and moreover, the air outlet can blow air obliquely upward to prevent the cold air from being directly blown towards persons. Meanwhile, the air output area can be enlarged, and the working performance of the air conditioner can be improved. In addition, with the air inlet panel being provided at the air inlet, external dust and other impurities are prevented from entering the air conditioner. Additionally, the reinforcing support can improve the structure strength of the face frame to prevent the face frame from deforming. 
     According to some embodiments of the present disclosure, an included angle between the air outlet surface and a vertical direction is α, and the α satisfies: 50°≤α≤66°. 
     According to some embodiments of the present disclosure, the reinforcing support includes a plurality of first support rods spaced apart along a left-right direction, and each extending along an up-down direction; and at least one second support rod extending along the left-right direction, the plurality of first support rods being connected with the second support rod. 
     According to some embodiments of the present disclosure, the air inlet panel is detachably provided at the air inlet. 
     According to some optional embodiments of the present disclosure, an upper end of the air inlet panel is formed with a plurality of first snaps spaced apart along the left-right direction, and the face frame is formed with a plurality of second snaps snapped with the plurality of first snaps in one-to-one correspondence, the second snap being supported on the first snap, and a snapping portion of second snap being located on a front side of and abutting against a snapping portion of the first snap; a lower end of the air inlet panel is formed with a plurality of third snaps spaced apart along the left-right direction, and the face frame is formed with a plurality of fourth snaps snapped with the third snaps in one-to-one correspondence, the third snap being supported on the fourth snap, and a snapping portion of the fourth snap being located on a front side of and abutting against a snapping portion of the third snap. 
     Optionally, the snapping portion of at least one third snap has a first guide surface, and the snapping portion of at least one fourth snap has a second guide surface cooperating with the first guide surface, both of the first guide surface and the second guide surface being configured as curved surfaces. 
     Optionally, a top of the air inlet panel is formed with a first flange part extending backwards, and the first flange part is suitable to abut a top wall of the air inlet; a bottom of the air inlet panel is formed with a second flange part extending backwards, and the second flange part abuts against a front wall of the face frame. 
     Optionally, the air inlet panel is formed with a plurality of positioning columns, and the plurality of positioning columns are distributed at a left end and a right end of the air inlet panel; the face frame is formed with a plurality of positioning holes fitted with the plurality of positioning columns in one-to-one correspondence. 
     Further, an outer peripheral wall of at least one of the positioning columns is formed with a first limiting protrusion, and an inner peripheral wall of at least one of the positioning holes is formed with a second limiting protrusion cooperating with the first limiting protrusion, wherein the second limiting protrusion is located on a front side of the first limiting protrusion and abuts against the first limiting protrusion. 
     According to embodiments of a second aspect of the present disclosure, a window air conditioner includes: an indoor part and an outdoor part connected with the indoor part. The indoor part includes: an indoor housing including the panel assembly according to the embodiments of the first aspect of the present disclosure; a volute provided in the indoor housing and defining an air channel in communication with both of the air inlet and the air outlet, the air channel extending to the air outlet; a fan wheel provided in the air channel; and an indoor heat exchanger provided in the indoor housing and arranged opposite to the air inlet. 
     For the window air conditioner according to the embodiments of the present disclosure, with the above panel assembly, the air blowing distance and the air output area of the air conditioner can be increased, and the deformation of the air inlet panel at the inlet can be prevented. 
     According to some embodiments of the present disclosure, the window air conditioner includes an air guide plate configured to open and close the air outlet, provided in the air channel, and rotatably connected with the volute. 
     According to some embodiments of the present disclosure, the window air conditioner includes an air guide assembly provided in the air channel and downstream of the fan wheel, the air guide assembly including a plurality of louvers spaced apart along a left-right direction, and each louver being rotatably connected with the volute. 
     Further, the air guide assembly includes a connecting rod extending along the left-right direction and being movable along the left-right direction, each of the louvers being rotatably connected with the connecting rod; and a shifting block provided in the air channel and being swingable leftwards and rightwards, the shifting block being connected with the connecting rod or any one of the louvers. 
     According to some embodiments of the present disclosure, the window air conditioner includes an air guide assembly provided in the air channel and located downstream of the fan wheel; and a protecting mesh provide din the air channel and located downstream of the air guide assembly, at least a part of the protecting mesh being recessed inwardly. 
     Optionally, the protecting mesh includes a first mesh section parallel to an air outlet surface, the air outlet surface being a plane where an end surface of the air outlet end is located; a second mesh section located upstream of the first mesh section, and having a first end connected with the first mesh section and a second end extending inwards, the second mesh section and the first mesh section being at an angle to each other; and a third mesh section located upstream of the second mesh section, the third mesh section and the first mesh section being located on both sides of the second mesh section, the second end of the second mesh section being connected with the third mesh section, and the third mesh section and the second mesh section being at angle to each other. 
     Further, the third mesh section extends obliquely inward in a direction from the second mesh section to the third mesh section. 
     Optionally, the air guide assembly includes: a plurality of louvers spaced apart along a left-right direction, each of the louvers being rotatably connected with the volute; a connecting rod extending along the left-right direction and being movable along the left-right direction, each of the louvers being rotatably connected with the connecting rod; and a shifting block provided in the air channel and being swingable leftwards and rightwards, the shifting block being connected with the connecting rod or any one of the louvers, the protecting mesh being formed with an operation opening corresponding to the shifting block. 
     According to some embodiments of the present disclosure, the volute includes a first volute and a second volute cooperating with each other, the first volute and the second volute define the air channel therebetween, and both of the first volute and the second volute are independently molded parts. 
     According to some embodiments of the present disclosure, the volute includes a first volute and a second volute cooperating with each other, the second volute is located at a rear side of the first volute, and the first volute and the second volute define the air channel therebetween. The air channel assembly includes a fan wheel provided in the air channel and located upstream of the air guide assembly. The second volute includes a first volute section and a second volute section connected in an up-down direction, the first volute section is opposite to the first volute and the fan wheel, and the second volute section is constituted by a part of the second volute below the fan wheel and extends straightly. 
     According to some embodiments of the present disclosure, the indoor heat exchanger includes a first heat exchange section and a second heat exchange section connected with each other, and the first heat exchange section and the second heat exchange section have an included angle therebetween. The window air conditioner further includes a filter screen located on a side of the indoor heat exchanger adjacent to the air inlet, the filter screen includes a first filter section and a second filter section connected with each other, the first filter section is opposite to and spaced apart from the first heat exchange section, and the second filter section is opposite to and spaced apart from the second heat exchange section. 
     Further, a distance between the first filter section and the first heat exchange section is d 1 , a distance between the second filter section and the second heat exchange section is d 2 , and the d 1  and the d 2  satisfy: 0.9≤d 1 /d 2 ≤1.2. 
     According to some embodiments of the present disclosure, the window air conditioner is supported in a window opening of a wall, and a movable window is provided in the window opening. The window air conditioner includes: a chassis, the indoor part and the outdoor part being both arranged on the chassis, a receiving groove being defined among the indoor part, the outdoor part and the chassis, and at least a part of the window being able to extend into the receiving groove. 
     According to some embodiments of the present disclosure, the window air conditioner includes a sealing assembly, and the sealing assembly contacts the window and an inner wall of the window opening separately. The sealing assembly includes a first connecting member of a variable length, including a fixing member and a slide block, at least a part of the fixing member being arranged in the receiving groove, and the slide block slidably cooperating with the fixing member; and a plurality of second connecting members, any one of the second connecting members being detachably connected with the slide block, and any two of the second connecting members being detachably connected with each other so as to adjust a length of the sealing assembly. 
     According to some embodiments of the present disclosure, the window air conditioner includes an intermediate partition plate fixed on the chassis and located in the receiving groove, the sealing assembly further including a rotating bracket fixed to the intermediate partition plate, the fixing member being rotatably provided at the rotating bracket to allow the sealing assembly to rotate to be stored in the receiving groove. 
     Further, the sealing assembly further includes an angular positioning assembly, the angular positioning assembly includes a positioning protrusion and a plurality of positioning recesses, the positioning protrusion is provided at the fixing member, and the plurality of positioning recesses are provided in the rotating bracket and arranged into a circular ring shape; when the rotating bracket is rotated, the positioning protrusion can be switchably fitted with the plurality of positioning recesses, and when the positioning protrusion is fitted with one of the positioning recesses, the fixing member is positioned. 
     According to some embodiments of the present disclosure, the sealing assembly further includes a slide positioning assembly, and the slide positioning assembly is provided at the fixing member and cooperates with the slide block to position the slide block in a current position. 
     Optionally, the fixing member is provided with a sliding cavity therein, and at least a part of the slide block extends into the sliding cavity. 
     Further, the slide positioning assembly is configured as a rotating member, the rotating member is rotatably provided through the fixing member and is threadedly fitted with the fixing member, the rotating member rotates to adjust a length of a portion of the rotating member that extends into the sliding cavity, and the rotating member can abut against the slide block to position the slide block. 
     Additional aspects and advantages of embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference to the drawings, in which: 
         FIG.  1    is a perspective view of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  2    is an enlarged view of part B in  FIG.  1   . 
         FIG.  3    is a front view of a partial structure of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  4    is a sectional view along line A-A in  FIG.  3   . 
         FIG.  5    is a perspective view of a partial structure of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  6    is a top view of the structure of the window air conditioner in  FIG.  5   . 
         FIG.  7    is an exploded view of a sealing assembly of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  8    is a perspective view of a rotating bracket of the sealing assembly in  FIG.  7   . 
         FIG.  9    is a perspective view of a first connecting member of the sealing assembly in  FIG.  7   . 
         FIG.  10    is a schematic diagram illustrating that a fixing member and a slide block of the first connecting member in  FIG.  9    cooperate with each other. 
         FIG.  11    is a rear view of a panel assembly according to the present disclosure. 
         FIG.  12    is a sectional view along line C-C in  FIG.  11   . 
         FIG.  13    is an enlarged view of part Din  FIG.  12   . 
         FIG.  14    is a sectional view along line E-E in  FIG.  11   . 
         FIG.  15    is an enlarged view of part F in  FIG.  14   . 
         FIG.  16    is a sectional view along line G-G in  FIG.  11   . 
         FIG.  17    is an enlarged view of part H in  FIG.  16   . 
         FIG.  18    is a sectional view along line I-I in  FIG.  11   . 
         FIG.  19    is an enlarged view of part J in  FIG.  18   . 
         FIG.  20    is a sectional view along line K-K in  FIG.  11   . 
         FIG.  21    is an enlarged view of part L in  FIG.  20   . 
         FIG.  22    is a sectional view along line M-M in  FIG.  11   . 
         FIG.  23    is an enlarged view of part N in  FIG.  22   . 
         FIG.  24    is a perspective view of a partial structure of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  25    is a front view of a partial structure of a window air conditioner according to an embodiment of the present disclosure. 
         FIG.  26    is a sectional view along line P-P in  FIG.  25   . 
         FIG.  27    is a schematic diagram illustrating that an indoor heat exchanger and a filter screen of a window air conditioner cooperate with each other according to an embodiment of the present disclosure. 
     
    
    
     DRAWING REFERENCE 
     
         
         
           
             window air conditioner  100 ; 
             indoor part  1 ; 
             indoor housing  11 ; face frame  111 ; air inlet  111   a ; air outlet  111   b ; rear case  112 ; reinforcing support  113 ; first support rod  1131 ; second support rod  1132 ; air inlet panel  114 ; air intake hole  114   a;    
             first snap  10 ; snapping portion  101 ; second snap  20 ; snapping portion  201 ; third snap  30 ; snapping portion  301 ; first guide surface  302 ; fourth snap  40 ; snapping portion  401 ; second guide surface  402 ; positioning column  50 ; first limiting protrusion  501 ; positioning hole  60 ; second limiting protrusion  601 ; first flange part  70 ; second flange part  80 ; 
             volute  12 ; first volute  121 ; second volute  122 ; first volute section  1221 ; second volute section  1222 ; air channel  12   a ; air outlet end  11   a;    
             air guide plate  13 ; 
             fan wheel  14 ; 
             indoor heat exchanger  15 ; first heat exchange section  151 ; second heat exchange section  152 ; 
             sealing assembly  16 ; first connecting member  161 ; fixing member  1611 ; sliding cavity  1611   a ; positioning protrusion  1611   b ; slide block  1612 ; second connecting member  162 ; insertion part  1621 ; insertion chamber  162   a ; rotating bracket  163 ; positioning recess  163   a ; slide positioning assembly  164 ; sealing end cover  165 ; 
             louver  171 ; connecting rod  172 ; shifting block  173 ; 
             protecting mesh  18 ; first mesh section  181 ; operation opening  1811 ; second mesh section  182 ; third mesh section  183 ; 
             filter screen  19 ; first filter section  191 ; second filter section  192 ; 
             outdoor part  2 ; 
             chassis  3 , intermediate partition plate  4 , receiving groove s. 
           
         
       
    
     DETAILED DESCRIPTION 
     Embodiments of the present disclosure will be described in detail below, and examples of the embodiments will be shown in the drawings, wherein the same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions. The embodiments described below with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. 
     A panel assembly for an air conditioner according to embodiments of the present disclosure will be described below with reference to  FIGS.  1 - 4   . 
     As shown in  FIGS.  1  and  4   , the panel assembly according to embodiments of a first aspect of the present disclosure includes a face frame  111 , an air inlet panel  114 , and a reinforcing support  113 . 
     The face frame  111  is formed with an air inlet  111   a  and an air outlet  111   b , and the air outlet  111   b  is located above the air inlet  111   a . A plane where the air outlet  111   b  is located is an air outlet surface, and the air outlet surface extends obliquely backward in a direction from bottom to top. Thus, with the air outlet  111   b  being arranged above the air inlet  111   a  and the air outlet surface of the air outlet  111   b  being configured to extend obliquely backward in the direction from bottom to top, a length of an air channel  12   a  can be shortened when the panel assembly is applied to the air conditioner. Thus, a length of a flow path in the air channel  12   a  can be shortened, air flow loss can be reduced, and an air blowing distance can be increased. Moreover, the air outlet  111   b  blows air obliquely upward to prevent cold air from being directly blown towards users. At the same time, an air output area can be enlarged, and working performance of the air conditioner can be improved. 
     The air inlet panel  114  is provided at the air inlet  111   a . The air inlet panel  114  is mesh-shaped. A plurality of air intake holes  114   a  are uniformly distributed in the air inlet panel  114 , and the air intake hole  114   a  can have a circular cross section. The air inlet panel  114  can prevent external dust and other impurities from entering the air conditioner. The air inlet panel  114  can be connected with the face frame  111 , and the air inlet panel  114  can also be connected with the reinforcing support  113 . The reinforcing support has a hollow structure through which airflow can pass. The reinforcing support  113  is provided at the air inlet  111   a  and at an inner side of the air inlet panel  114  (the inner side of the air inlet panel  114  refers to a side of the air inlet panel  114  close to a center of the air conditioner, such as a rear side of the air inlet panel  114 ), and a supporting member is connected with the face frame  111 . Thus, the reinforcing support  113  can improve the structure strength of the face frame to prevent the face frame  111  from deforming. 
     Optionally, the reinforcing support  113  and the face frame  111  can be formed integrally. Thus, the assembly process of the face frame  111  and the reinforcing support  113  can be simplified, and the overall structure strength of the face frame  111  can be improved. 
     Optionally, the air inlet panel  114  can be detachably provided at the air inlet  111   a . For example, the air inlet panel  114  can be screwed to the face frame  111  or the reinforcing support  113 , and the air inlet panel  114  can also be connected with the face frame  111  or the reinforcing support  113  by a snap. Thus, it is convenient to disassemble, assemble and maintain the air inlet panel  114 , as well as other components in the air conditioner. For example, with the air inlet panel  114  being removed, other components in the air conditioner can be disassembled, assembled or maintained through the air inlet  111   a.    
     In the panel assembly for the air conditioner according to the embodiments of the present disclosure, the air outlet  111   b  is arranged above the air inlet  111   a  and the air outlet surface of the air outlet  111   b  is configured to extend obliquely backward in the direction from bottom to top, hence the length of the air channel  12   a  can be reduced when the panel assembly is applied to the air conditioner, thereby shortening the length of the flow path in the air channel  12   a  and reducing the air flow loss, the air blowing distance can be increased, and moreover, the air outlet  111   b  can blow air obliquely upward to prevent the cold air from being directly blown towards persons. Meanwhile, the air output area can be enlarged, and the working performance of the air conditioner can be improved. In addition, with the air inlet panel  114  at the air inlet  111   a , external dust and other impurities can be prevented from entering the air conditioner. Additionally, with the reinforcing support  113 , the structure strength of the face frame  111  can be improved and the deformation of the face frame  111  can be prevented. 
     According to some embodiments of the present disclosure, referring to  FIG.  4   , an included angle between the air outlet surface and the vertical direction is denoted as α and α satisfies: 50°≤α≤66°. Thus, with the included angle between the air outlet surface and the vertical direction being set within the above range, the air outlet surface can have a relatively large air output area, and while the flow path in the air conditioner is shortened, not only direct air blowing towards people can be avoided, but also the air outlet  111   b  can blow air obliquely forward at a suitable angle. 
     According to some embodiments of the present disclosure, referring to  FIG.  3   , the reinforcing support  113  includes a plurality of first support rods  1131  spaced apart in a left-right direction and at least one second support rod  1132 . Each of the first support rods  1131  extends along an up-down direction, and the second support rod  1132  extends along the left-right direction. The plurality of first support rods  1131  are each connected with the second support rod  1132 . As a result, the reinforcing support  113  has a simple structure and high structure strength. 
     According to some optional embodiments of the present disclosure, referring to  FIGS.  11 - 17   , the air inlet panel  114  is detachably provided at the air inlet  111   a . A plurality of first snaps  10  (for example, two) are provided at an upper end of the air inlet panel  114  and spaced apart along the left-right direction. The face frame  111  is provided with a plurality of second snaps  20  (for example, two) snapped with the first snaps  10  in one-to-one correspondence. The second snap  20  is supported on the first snap  10 . A snapping portion  201  of the second snap  20  is located on a front side of a snapping portion  101  of the first snap  10  and abuts against the snapping portion  101 . A plurality of third snaps  30  (for example, four) are provided at a lower end of the air inlet panel  114  and spaced apart along the left-right direction. The face frame  111  is provided with a plurality of fourth snaps  40  (for example, two) snapped with the third snaps  30  in one-to-one correspondence. The third snap  30  is supported on the fourth snap  40 . A snapping portion  401  of the fourth snap  40  is located on a front side of a snapping portion  301  of the third snap  30  and abuts against the snapping portion  301 . 
     Thus, since the second snap  20  is supported on the first snap  10  and the third snap  30  is supported on the fourth snap  40 , position limiting of the air inlet panel  114  in the up-down direction can be realized; since the snapping portion  201  of the second snap  20  is located on the front side of and abuts against the snapping portion  101  of the first snap  10 , and the snapping portion  401  of the fourth snap  40  is located on the front side of and abuts against the snapping portion  301  of the third snap  30 , position limiting of the air inlet panel  114  in a front-rear direction can be realized. A left end a right end of the air inlet panel  114  abut against a left side wall and a right side wall of the air inlet  111   a  respectively, such that position limiting of the air inlet panel  114  in the left-right direction can be realized. Thus, the air inlet panel  114  can be mounted and positioned at the air inlet  111   a , and the air inlet panel  111   a  can be mounted and disassembled conveniently. 
     Optionally, referring to  FIG.  15    and in conjunction with  FIG.  14   , the snapping portion  301  of at least one third snap  30  has a first guide surface  302 , and the snapping portion  401  of at least one fourth snap  40  has a second guide surface  402  cooperating with the first guide surface  302 . Both of the first guide surface  302  and the second guide surface  402  are curved surfaces. For example, in the examples of  FIGS.  11  and  14 - 17   , four third snaps  30  and four fourth snap  40  are provided, the rightmost third snap  30  and the leftmost third snap  30  each have the first guide surface  302 , and the corresponding two fourth snaps  40  each have the second guide surface  402 . Thus, through the cooperation of the first guide surface  302  and the second guide surface  402 , the disassembly and assembly of the air inlet panel  114  is easier and smoother. For example, during the disassembly of the air inlet panel  114 , the first snap  10  can be separated from the second snap  20  and then the upper end of the air inlet panel  114  can be rotated forward. In the process of rotating the air inlet panel  114 , due to the cooperation between the first guide surface  302  and the second guide surface  402 , the rotation of the air inlet panel  114  is easier and smoother. When the air inlet panel  114  is rotated forward by a certain angle, the third snap  30  is separated from the fourth snap  40  so that the air inlet panel  114  can be easily and conveniently removed. 
     Optionally, referring to  FIGS.  14 - 19   , a top of the air inlet panel  114  is formed with a first flange part  70  extending backward, and the first flange part  70  is suitable to abut against a top wall of the air inlet  111   a . Therefore, the position limitation on the air inlet panel  114  along the up-down direction can be further enhanced, and a contact area between the air inlet panel  114  and the face frame  111  can be increased as well, thereby improving the installation reliability of the air inlet panel  114 . A bottom of the air inlet panel  114  is formed with a second flange part  80  extending backward, and the second flange part  80  abuts against a front wall of the face frame  111 . Therefore, the position limitation on the air inlet panel  114  along the front-rear direction can be further enhanced, so that the installation of the air inlet panel  114  is more reliable. 
     Optionally, referring to  FIGS.  20 - 23   , the air inlet panel  114  is formed with a plurality of positioning columns  50  (for example, four), and the plurality of positioning columns  50  are distributed at left and right ends of the air inlet panel  114 . The face frame  111  is formed with a plurality of positioning holes  60  (for example, four) fitted with the plurality of positioning columns  501  in one-to-one correspondence. Therefore, due to the fitting between the positioning columns  50  and the positioning holes  60 , in combination with the aforementioned snap fitting, the installation reliability of the air inlet panel  114  can be further improved. 
     Furthermore, referring to  FIG.  21   , an outer peripheral wall of at least one of the positioning columns is formed with a first limiting protrusion  501 , and an inner peripheral wall of at least one of the positioning holes  60  is formed with a second limiting protrusion  601  cooperating with the first limiting protrusion  501 . The second limiting protrusion  601  is located on a front side of the first limiting protrusion  501  and abuts against the first limiting protrusion  501 . Thus, the cooperation reliability of the positioning column  50  and the positioning hole  60  can be further improved, thereby further enhancing the installation reliability of the air inlet panel  114 . 
     For example, in the examples of  FIG.  11    and  FIGS.  20 - 23   , the air inlet panel  114  is formed with four positioning columns  50 , two of the four positioning columns  50  are located at the left end of the air inlet panel  114  and spaced apart along the up-down direction, and the other two positioning columns  50  are located at the right end of the air inlet panel  114  and spaced apart along the up-down direction. The face frame  111  is formed with four positioning holes  60  in corresponding positions. An upper positioning column  50  of the positioning columns  50  at the left end has an outer peripheral wall formed with the above-mentioned first limiting protrusion  501 , and an upper positioning column  50  of the positioning columns  50  at the right end has an outer peripheral wall formed with the above-mentioned first limiting protrusion  501 . Correspondingly, the respective inner peripheral walls of the two corresponding positioning holes  60  are each formed with the above-mentioned second limiting protrusion  601 . Thus, the disassembly and assembly of the air inlet panel  114  can be convenient, and the air inlet panel  114  can be installed firmly. 
     As shown in  FIGS.  1 - 6   , a window air conditioner  100  according to embodiments of a second aspect of the present disclosure includes an indoor part  1  and an outdoor part  2 . The outdoor part is connected with the indoor part  1 . The indoor part  1  includes: an indoor housing  11 , a volute  12 , an indoor heat exchanger  15 , and a fan wheel  14 . The indoor housing  11  includes the panel assembly according to the embodiments of the first aspect of the present disclosure, and a rear case  112 . The rear case  112  is located at a rear side of the face frame  111  and is connected with the face frame  111 . The volute  12  is provided in the indoor housing  11 . The volute  12  can include a first volute  121  and a second volute  122  arranged along the front-rear direction. The volute  12  defines an air channel  12   a  in communication with both of the air inlet  111   a  and the air outlet  111   b . The air channel  12   a  extends to the air outlet  111   b , and the fan wheel  14  is provided in the air channel  12   a . The indoor heat exchanger  15  is provided in the indoor housing  11 , and the indoor heat exchanger  15  and the air inlet  111   a  are arranged opposite to each other. 
     When the window air conditioner  100  works, the fan wheel  14  operates to drive airflow to enter the air channel  12   a  from the air inlet  111   a  and flow along the air duct  12   a . After exchanging heat with the indoor heat exchanger  15  in the air channel  12   a , the airflow flows out to the indoor through the air outlet  111   b , thereby adjusting the indoor temperature. 
     For the window air conditioner  100  according to the embodiments of the present disclosure, with the above panel assembly, the air blowing distance and the air output area of the air conditioner can be increased, and the deformation of the air inlet panel  114  at the inlet  111   a  can be prevented. 
     According to some embodiments of the present disclosure, referring to  FIGS.  1 , and  3 - 4   , the window air conditioner  100  includes an air guide plate  13  configured to open and close the air outlet  111   b . The air guide plate  13  is provided in the air channel  12   a  and is rotatably connected with the volute  12 . Thus, the opening and closing of the air outlet  111   b  can be easily achieved by arranging the air guide plate  13  at the air outlet  111   b , and by controlling a rotation angle of the air guide plate  13 , the air blowing direction can also be adjusted, and for example, the air output in the up-down direction can be adjusted. 
     According to some embodiments of this disclosure, referring to  FIGS.  4  and  24 - 26   , the window air conditioner  100  includes: an air guide assembly, and the air guide assembly is arranged in the air channel  12   a  and downstream of the fan wheel  14 . The air guide assembly includes a plurality of louvers  171  spaced apart along the left-right direction, and each louver  171  is rotatably connected with the volute  12 . Thus, with the aforementioned air guide assembly being provided in the air channel  12   a , an air guiding function in the left-right direction can be achieved. For example, the window air conditioner  100  can blow air towards a left front side or towards a right front side, or towards a front side. Moreover, because the air guide assembly is arranged in the air channel  12   a  defined by the volute  12  and is connected with the volute  12 , the internal structure of the air channel can be simplified. The airflow flows along the air channel  12   a  defined by the volute  12 , and is blown out to the indoor through the air outlet  1116  after being guided by the air guide assembly in the air channel  12   a . During the process of the airflow flowing along the air channel  12   a  to the air outlet  111   b , the airflow always flows in the volute  12 . The loss caused by the air flowing along different components can be avoided, thus reducing the air flow loss. 
     In addition, with the air guide assembly, the air guide plane  13  and the like in the volute  12 , the installation of the air guide structures of the whole machine is modularized, and the assembly of the whole machine is also facilitated. For example, after the air guide structures such as the air guide assembly and the air guide plane  13  are installed into the volute  12 , the air channel  12   a  can be integrally installed into a housing of the whole machine. 
     For example, in one embodiment of the present disclosure, referring to  FIGS.  24  and  25   , the air guide assembly includes a plurality of louvers  171  spaced apart in the left-right direction and a connecting rod  172 . Each louver  171  is rotatably connected with volute  12 , and the connecting rod  172  extends along the left-right direction and is movable along the left-right direction. Each louver  171  is rotatably connected with the connecting rod  172 . When the connecting rod  172  moves, the plurality of louvers  171  are driven to swing in the left-right direction, so as to achieve the air guiding effect along the left-right direction. At the same time, the window air conditioner  100  also includes the air guide plate  13 , and can adjust the air output in the up-down direction by controlling the rotation angle of the air guide plate  13 . Thus, with the air guide plate  13  and the air guide assembly including the plurality of louvers  171 , the air guidance of the window air conditioner  100  in the left-right direction and the up-down direction can be achieved, and an air guiding range of the window air conditioner  100  can be expanded. 
     Further, referring to  FIGS.  24  and  25   , the air guide assembly can also include a shifting block  173 . The shifting block  173  is provided in the air channel  12   a  and is swingable in the left-right direction, and the shifting block  173  is connected with the connecting rod  172  or any one of the louvers  171 . For example, the shifting block  173  can be connected with the connecting rod  172 . When the shifting block  173  is shifted leftwards or rightwards, the connecting rod  172  can be pushed to move leftwards or rightwards, such that the plurality of louvers  171  are driven to turn leftwards or rightwards, and then the air blowing direction can be adjusted. The shifting block  173  can also be connected with any one of the plurality of louvers  171 . When the shifting block  173  is shifted leftwards or rightwards, the corresponding louver  171  can be driven to turn, and the connecting rod  172  can be driven to move leftwards or rightwards, in order to drive other louvers  171  to turn leftwards or rightwards, thereby adjusting the air blowing direction. Thus, with the shifting block  173 , the plurality of louvers  171  can turn easily without energy consumption, which reduces the energy consumption of the whole machine, eliminates a component for driving the louvers  171  to turn, and simplifies the structure of the whole machine. 
     According to some embodiments of the present disclosure, referring to  FIGS.  24 - 26   , the window air conditioner  100  includes the air guide assembly and a protecting mesh  18 . The air guide assembly is provided in the air channel  12  and located downstream of the fan wheel  14 . When the fan wheel  14  operates, the fan wheel  14  drives airflow to flow along the air channel  12   a  towards an air outlet end  11   a  of the air channel  12   a . The protecting mesh  18  is provided in the air channel  12   a  and located downstream of the air guide assembly. At least a part of the protecting mesh  18  is recessed inwardly (the inward direction refers to a direction facing the air channel  12   a ). It is possible that only a part of the protecting mesh  18  is recessed inwardly, and it is also possible that the whole protecting mesh  18  is recessed inwardly. As a result, with the protecting mesh  18 , it is possible to prevent hands from extending into the air channel  12   a , thereby avoiding danger and improving safety. 
     Moreover, with the protecting mesh  18  being provided downstream of the air guide assembly, the protecting mesh  18  can disperse the airflow at the air outlet end  11   a  to some extent, and the air blowing at the air outlet end  11   a  is more uniform and gentle. In addition, with at least a part of the protecting mesh  18  being recessed inward, a space for accommodating other air guiding structures can be reserved at the air outlet end  11   a . For example, when the air guide plate  13  is provided at the air outlet end  11   a , with at least a part of the protecting mesh  18  being recessed inward, a space for accommodating the air guide plate  13  and for its movement can be reserved, so as to prevent interference with the protecting mesh  18  when the air guide plate  13  turns. Meanwhile, the structure of the air channel assembly is compact. 
     In other embodiments, the protecting mesh  18  can also be arranged upstream of the air guide assembly, so that the air guide assembly is closer to the air outlet  111   b  and the air guiding effect is better. 
     Optionally, the protecting mesh  18  can be a metal mesh, and for example, the protecting mesh  18  can be an iron wire mesh. 
     Optionally, referring to  FIGS.  24  and  26   , the protecting mesh  18  includes: a first mesh section  181 , a second mesh section  182 , and a third mesh section  183 . The first mesh section  181  is parallel to the air outlet surface, and the air outlet surface is a plane where an end surface of the air outlet end  11   a  is located. The first mesh section  181  is connected with an inner wall of the volute  12 . The second mesh section  182  is located upstream of the first mesh section  181 . A first end of the second mesh section  182  is connected with the first mesh section  181 , and a second end of the second mesh section  182  extends inward (the inward direction refers to the direction facing the air channel  12   a ). The second mesh section  182  and the first mesh section  181  are at an angle to each other. The third mesh section  183  is located upstream of the second mesh section  182 , and the third mesh section  183  and the first mesh section  181  are located on both sides of the second mesh section  182 . The second end of the second mesh section  182  is connected with the third mesh section  183 . The third mesh section  183  and the second mesh section  182  are at an angle to each other. The third mesh section  183  is connected with the inner wall of the volute  12 . Thus, with the third mesh section  183  being recessed inward, a clearance space is defined among the second mesh section  182 , the third mesh section  183 , and the inner walls of volute  12 , and the clearance space can be used for rotation of the air guide plate  13 . In addition, the protecting mesh  18  has a generally z-shaped cross section, such that the protecting mesh  18  has high structure strength. 
     Further, referring to  FIGS.  24  and  26   , the third mesh section  183  extends obliquely inward in a direction from the second mesh section  182  to the third mesh section  183  (the inward direction refers to the direction facing the air channel  12   a ). Therefore, a larger clearance space is reserved to ensure that the air blowing structure (such as the air guide plate  13 ) installed at the air outlet end  11   a  has a sufficient movement space. 
     According to some embodiments of the present disclosure, referring to  FIGS.  24 - 26   , the air guide assembly includes: a plurality of louvers spaced apart along the left-right direction, a connecting rod, and a shifting block  173 . Each louver is rotatably connected with the volute  12 . The connecting rod extends along the left-right direction and is movable along the left-right direction. Each louver is rotatably connected with the connecting rod. The plurality of louvers can be driven to swing in the left-right direction when the connecting rod moves, so as to achieve the air guiding effect in the left-right direction. The shifting block  173  is provided in the air channel  12   a  and is swingable in the left-right direction. The shifting block  173  is connected with the connecting rod  172 , or the shifting block  173  is connected with any one of the louvers  171 . For example, the shifting block  173  can be connected with the connecting rod  172 . When the shifting block  173  is shifted leftwards or rightwards, the connecting rod  172  can be pushed to move leftwards or rightwards, such that the plurality of louvers  171  are driven to turn leftwards or rightwards, and then the air blowing direction can be adjusted. The shifting block  173  can also be connected with any one of the plurality of louvers  171 . When the shifting block  173  is shifted leftwards or rightwards, the corresponding louver  171  can be driven to turn, and the connecting rod  172  can be driven to move leftwards or rightwards, in order to drive other louvers  171  to turn leftwards or rightwards, thereby adjusting the air blowing direction. Thus, with the shifting block  173 , the plurality of louvers  171  can turn easily without energy consumption, which reduces the energy consumption of the whole machine, eliminates a components for driving the louvers  171  to turn, and simplifies the structure of the whole machine. Meanwhile, the protecting mesh  18  is provided with an operation opening  1811  corresponding to the shifting block  173 . For example, the operation opening  1811  can be formed in the above-mentioned first mesh section  181 . Thus, with the shifting block  173  being operated in the operation opening  1811 , it is convenient to operate the shifting block  173 . 
     According to some embodiments of the present disclosure, referring to  FIGS.  4  and  24 - 26   , the volute  12  includes a first volute  121  and a second volute  122  cooperating with each other. The first volute  121  and the second volute  122  define the air channel  12   a  therebetween, and both the first volute  121  and the second volute  122  are independently molded parts. Thus, with the volute  12  being configured as the first volute  121  and the second volute  122  which are molded independently, the installation of the air channel assembly is facilitated. For example, the installation of the air guide assembly, the air guide plate  13  and the fan wheel  14  can be more convenient. 
     According to some embodiments of the present disclosure, referring to  FIGS.  4  and  24 - 26   , the volute  12  includes a first volute  121  and a second volute  122  cooperating with each other. The second volute  122  is located at a rear side of the first volute  121 . The first volute  121  and the second volute  122  define the air channel  12   a  therebetween. The air channel assembly includes a fan wheel  14 , and the fan wheel  14  is provided in the air channel  12   a  and located upstream of the air guide assembly. The second volute  22  includes a first volute section  1221  and a second volute section  1222  connected in the up-down direction. The first volute section  1221  is opposite to the first volute  121  and the fan wheel  14 . The second volute section  1222  is constituted by a part of the second volute  122  below the fan wheel  14 . The second volute section  1222  extends straightly. For example, the second volute section  1222  can extend vertically, and the second volute section  1222  can also have a small angle relative to the vertical direction. Thus, with the second volute section  1222  being configured to extend straightly, the air flow can be smoother, the noise generated by the air flow along the second volute section  1222  can be reduced, and the structure of the volute  12  is simple and easy to manufacture. 
     It should be noted that the terms “upstream” and “downstream” described in this disclosure is with respect to the air flow direction. 
     According to some embodiments of the present disclosure, referring to  FIGS.  4  and  24 - 27   , the indoor heat exchanger  15  includes a first heat exchange section  151  and a second heat exchange section  152  connected with each other. There is an angle between the first heat exchange section  151  and the second heat exchange section  152 . For example, the angle between the first heat exchange section  151  and the second heat exchange section  152  can be an obtuse angle. The first heat exchange section  151  extends vertically, and the second heat exchange section  152  extends obliquely backward in the direction from top to bottom. Thus, with the indoor heat exchanger  15  being configured to include the first heat exchange section  151  and the second heat exchange section  152  that are at an angle to each other, a heat exchange area of the indoor heat exchanger  15  can be expanded and a heat exchange effect can be improved. The window air conditioner  100  also includes a filter screen  19 , and the filter screen  19  is located on a side of the indoor heat exchanger  15  adjacent to the air inlet  111   a . The air entering from the air inlet  111   a  can be filtered through the filter screen  19 . The filter screen  19  includes a first filter section  191  and a second filter section  192  connected with each other. The first filter section  191  is opposite to and spaced apart from the first heat exchange section  151 , and the second filter section  192  is opposite to and spaced apart from the second heat exchange section  152 . Thus, there is a space for air flowing between the indoor heat exchanger  15  and the filter screen  19 , to enable the airflow to exchange heat with the indoor heat exchanger  15  sufficiently. 
     Optionally, referring to  FIG.  27   , an angle between the first filter section  191  and the second filter section  192  is equal to the angle between the first heat exchange section  151  and the second heat exchange section  152 . For example, the angle between the first heat exchange section  151  and the second heat exchange section  152 , and the angle between the first filter section  191  and the second filter section  192  are both obtuse angles. The first heat exchange section  151  and the first filter section  191  extend vertically, while the second heat exchange section  152  and the second filter section  192  extend obliquely backward in the direction from top to bottom. As a result, the filter screen  19  and the indoor heat exchanger  15  have the same bending angle, and therefore the structure of the whole machine becomes compact. 
     Optionally, referring to  FIG.  27   , a distance between the first filter section  191  and the first heat exchange section  151  is d 1 , a distance between the second filter section  192  and the second heat exchange section  152  is d 2 , and d 1  and d 2  satisfy: 0.9≤d 1 /d 2 ≤1.2. Thus, the distance between the filter screen  19  and the indoor heat exchanger  15  can be relatively uniform. When the airflow flows between the filter screen  19  and the indoor heat exchanger  15 , the eddy current can be reduced and the noise can be decreased. 
     According to some embodiments of the present disclosure, referring to  FIGS.  1  and  3 - 6   , the window air conditioner  100  is supported in a window opening of a wall, and a movable window is provided in the window opening. The window air conditioner  100  includes a chassis  3 , an indoor part  1  and an outdoor part  2 , and the indoor part  1  and the outdoor part  2  are both arranged on the chassis  3 . A receiving groove s is defined among the indoor part  1 , the outdoor part  2  and the chassis  3 . At least a part of the window can extend into the receiving groove s. For example, only a part of the window extends into the receiving groove s, or the whole window can be arranged in the receiving groove s. This not only facilitates the installation of the window air conditioner  100  into the window opening, thereby improving the installation reliability and stability of the window air conditioner  100 , and also facilitates the cooperation between the window air conditioner  100  and the window, making the appearance of the window air conditioner  100  more aesthetic after installation. 
     According to some embodiments of the present disclosure, referring to  FIGS.  1  and  5 - 7   , the window air conditioner  100  includes a sealing assembly  16 , and the sealing assembly  16  contacts the window and an inner wall of the window opening separately. The sealing assembly  16  includes a first connecting member  161  of a variable length, and a plurality of second connecting members  162 . The first connecting member  161  includes a fixing member  1611  and a slide block  1612 . At least a part of the fixing member  1611  is arranged in the receiving groove s. It is possible that only a part of the fixing member  1611  is arranged in the receiving groove s, or the whole fixing member  1611  is arranged in the receiving groove s. The slide block  1612  slidably cooperates with the fixing member  1612 . Any one of the second connecting members  162  can be detachably connected with the slide block  1612 , and any two of the second connecting members  162  can be detachably connected with each other. 
     Since the sealing assembly  16  includes the first connecting member  161 , and the first connecting member  161  includes the fixing member  1611  and the slide block  1612 , the sealing assembly  16  can be installed to the window air conditioner  100  by using the fixing member  1611 , thereby facilitating the arrangement of the sealing assembly  16  and avoiding the loss of the sealing assembly  16 ; furthermore, through the sliding cooperation between the slide block  1612  and the fixing member  1611 , the length of the first connecting member  161  can be adjusted, so the length of the sealing assembly  16  can adjusted, which allows the sealing assembly  16  to seal windows of various sizes, improves a sealing effect of the sealing assembly  16 , and expands the application range of the sealing assembly  16 . Hence, the application scope of the window air conditioner  100  can be broadened, and the functionality and applicability of the window air conditioner  100  can be improved. 
     In addition, with the plurality of second connecting members  162 , any one of the second connecting members  162  can be detachably connected with slide block  1612 , and any two of the second connecting members  162  can be detachably connected to each other to adjust the length of sealing assembly  16 . The structural flexibility of the sealing assembly  16  can be improved. The length of the sealing assembly  16  can be adjusted by connecting different numbers of the second connecting members  162 , so as to extend a variation range of the sealing length of the sealing assembly  16  and allow the sealing assembly  16  to adapt to various sizes of windows, thereby further improving the sealing reliability and stability of the sealing assembly  16 , and further expanding the application range of the sealing assembly  16 . 
     For example, in an embodiment of the present disclosure, referring to  FIG.  7   , each second connecting member  162  includes an insertion part  1621 , and each second connecting member  162  and the slide block  1612  both have an insertion chamber  162   a . The insertion part  1621  of each second connecting member  162  can be fitted in the insertion chamber  162   a  of the adjacent second connecting member  162  in a pluggable manner. Thus, the adjacent second connecting members  162  can be connected with each other conveniently, in order to achieve assembled configuration of the plurality of second connecting members  162  and further facilitate the change of the sealing length of the sealing assembly  16 . 
     According to some optional embodiments of the present disclosure, referring to  FIGS.  7  and  8   , the sealing assembly  16  also includes a rotating bracket  163 , and the rotating bracket  163  is fixed on the chassis  3 . The fixing member  1611  is rotatably provided at the rotating bracket  163  so that the sealing assembly  16  can be rotated to be stored in the receiving groove s, which not only facilitates the installation and arrangement of the fixing member  1611 , but also facilitates the rotation of the fixing member  1611  relative to the rotating bracket  163 , in order to store the sealing assembly  16  and reduce a space occupied by the sealing assembly  16 . 
     For example, in an embodiment of the present disclosure, referring to  FIGS.  1  and  4 - 6   , the window air conditioner  100  also includes an intermediate partition plate  4 , and the intermediate partition plate  4  is fixed on the chassis  3  and located in the receiving groove s 21 . A front end and a rear end of the intermediate partition plate  4  are connected with the indoor part  1  and the outdoor part  2 , respectively. The rotating bracket  163  is fixed to the intermediate partition plate  4 , and the fixing member  1611  is rotatably arranged to the rotating bracket  163  so that the sealing assembly  16  can be rotated to be stored in the receiving groove s. Thus, with the intermediate partition plate  4 , the connection strength between the indoor part  1  and the outdoor part  2  can be strengthened, a lower surface of the window can abut against the intermediate partition plate  4  to facilitate the wiring and drainage of the window air conditioner  100 , thereby enhancing the working reliability of the window air conditioner  100 . Moreover, since the fixing member  1611  is rotatably arranged to the rotating bracket  163 , the sealing assembly  16  can be stored conveniently and the space occupied by the sealing assembly  16  can be reduced. 
     Further, referring to  FIGS.  7 - 9   , the sealing assembly  16  also includes an angular positioning assembly, and the angular positioning assembly includes a positioning protrusion  1611   b  and a plurality of positioning recesses  163   a . The positioning protrusion  1611   b  is provided at the fixing member  1611 , and the plurality of positioning recesses  163   a  are provided in the rotating bracket  163  and arranged into a circular ring shape. When the rotating bracket  163  is rotated, the positioning protrusion  1611   b  can be switchably fitted with the plurality of positioning recesses  163   a . When the positioning protrusion  1611   b  is fitted with one of the positioning recesses  163   a , the fixing member  1611  is positioned. Thus, the fixing member  1611  can be positioned at a specific angle by providing the angular positioning assembly, and it is convenient for users to position the rotation angle of the fixing member  1611  according to requirements, thereby improving the performance of the sealing assembly  16 . Moreover, with the angular positioning assembly being configured in the above-mentioned structure, the rotation angle of the fixing member  1611  can be positioned by the fitting between the positioning protrusion  1611   b  and the positioning recess  163   a , and the fixing member  1611  can be positioned at different angles, so as to improve the positioning reliability and stability of the fixing member  1611 . 
     According to some optional embodiments of the present disclosure, referring to  FIGS.  9  and  10   , the sealing assembly  16  also includes a slide positioning assembly  164 , and the slide positioning assembly  164  is provided at the fixing member  1611  and cooperates with the slide block  1612  to position the slide block  1612  in a current position. In this way, the slide block  1612  can be positioned by the slide positioning assembly  164 , so that the sealing assembly  16  can be maintained at a specific sealing length, thereby improving the structural stability of the sealing assembly  16 , and achieving the reliable sealing of the sealing assembly  16 . 
     Optionally, referring to  FIGS.  9  and  10   , the fixing member  1611  is provided with a sliding cavity  1611   a , and at least a part of the slide block  1612  extends into the sliding cavity  1611   a . Thus, the fixing member  1611  and the slide block  1612  can cooperate and be arranged conveniently, thereby facilitating the sliding of the slide block  1611  relative to the fixing member  1611 . 
     Further, referring to  FIGS.  9  and  10   , the slide positioning assembly  164  is a rotating member. The rotating member is rotatably provided through the fixing member  1611  and is threadedly fitted with the fixing member  1611 . The rotating member rotates to adjust a length of a portion of the rotating member that extends into the sliding cavity  1611   a . The rotating member can abut against the slide block  1612  to position the slide block  1612 . In this way, the user can control whether the slide block  1612  can slide or not by rotating the rotating member, thereby allowing the user to adjust the length of the slide block  1612  conveniently according to requirements. 
     According to some optional embodiments of the present disclosure, referring to  FIG.  7   , the sealing assembly  16  also includes a sealing end cover  165  configured to seal an open end of the insertion chamber  162   a  farthest away from the fixing member  1611 . Thus, not only the insertion chamber  162   a  farthest away from the fixing member  1611  can be sealed conveniently to improve the sealing property of the second connecting member  162 , but also the plurality of second connecting members  162  can have the same structure, facilitating the processing and manufacturing of the second connecting members  162  and improving the interchangeability of the second connecting members  162 . 
     Reference throughout this specification to “an embodiment,” “some embodiments,” “an exemplary embodiment,” “an example,” “a specific example,” or “some examples,” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the illustrative descriptions in connection with the above terms throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. 
     Although embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations can be made in the embodiments without departing from the scope of the present disclosure. The scope of the present invention is defined by the claims and the like.