CN217357175U - Wall-mounted air conditioner indoor unit - Google Patents

Abstract

The utility model provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit includes a cover and a front panel. The top of the cover is provided with an air inlet grille. The front panel is detachably fixed on the front side of the cover. The front side of the air grille is provided with a plurality of first clamping grooves along its transverse direction, and a plurality of first clamping parts are formed on the surface of the front panel facing the casing. The first card grooves are matched in one-to-one correspondence to fasten the air inlet grille. The wall-mounted air conditioner indoor unit of the utility model can not only reduce the flash gap between the cover shell and the front panel, but also prevent the air intake grille from sagging toward the middle part of the center by the cooperation of the first clamping part and the first clamping groove, so as to ensure the air intake. The appearance of the style grille is normal, the practicability is strong, and it is easy to promote.

Description

Wall-mounted air conditioner indoor unit

technical field

The utility model relates to the field of air conditioning, in particular to a wall-mounted air conditioner indoor unit.

Background technique

In the traditional air conditioner indoor unit, the top of the cover is provided with an air inlet grille, and the front panel is fixed on the front side of the cover to decorate and protect the indoor unit. However, there is no assembly structure between the air inlet grille of the cover and the front panel. After the whole machine is assembled, if the dimensional accuracy of the front panel in the length direction is not well controlled, the middle of the panel will warp easily, and the top of the cover and the panel will be warped. In addition, after the air conditioner is used for a long time, the air inlet grille at the top is prone to aging deformation and stress relaxation, and the grille will sag from the middle.

Utility model content

One objective of the present utility model is to overcome at least one defect in the prior art and provide a wall-mounted air conditioner indoor unit.

A further purpose of the utility model is to not only reduce the flash gap between the cover and the front panel, but also prevent the air intake grille from sagging toward the central part, so as to ensure the normal appearance of the air intake grille.

Another further objective of the present invention is to provide strength support for the air inlet grille to ensure that the air inlet grille will not be deformed.

Another further object of the present invention is to fix the cover and the front panel.

In particular, the utility model provides a wall-mounted air conditioner indoor unit, comprising: a cover, the top of the cover is provided with an air intake grille; a front panel is detachably fixed on the front side of the cover; wherein the air intake grille The front side of the front panel is provided with a plurality of first card slots along its transverse direction, and the surface of the front panel facing the casing is formed with a plurality of first clamping parts. The grooves are matched in a one-to-one correspondence to fasten the intake grille.

Optionally, each of the first card slots is opened downward, and when the first engaging portion is matched with the first card slot, the first engaging portion extends into the first card slot from bottom to top to lift up. Inlet grille.

Optionally, the air inlet grille includes a hollow portion for forming an inlet of the heat exchange airflow; the number of the first locking grooves is two, and the two first locking grooves are arranged on the front side of the hollow portion.

Optionally, the ratio between the distance between the two first card slots and the lateral length of the hollow portion is between 1/4 and 3/4.

Optionally, the air intake grille has two fixing parts connected to the two lateral ends of the hollow part; the casing further comprises: a front frame, the front frame comprises two fixing parts extending downward respectively from the front sides of the two fixing parts. The connecting part and the lateral main body connected to the ends of the two connecting parts in the lateral direction; between the ends of the side wall panels, and the front end of the bottom wall panel is connected to the bottom portion of the transverse body.

Optionally, each connecting part is respectively provided with a second clamping slot, the surface of the front panel facing the housing is formed with two second clamping parts, and the second clamping parts are matched with the second clamping grooves in a one-to-one correspondence, to fasten the front panel to the cover.

Optionally, each second clamping slot has a positioning hole, and each second clamping portion has a positioning pin. When the second clamping portion is matched with the second clamping slot, the positioning pin extends into the positioning hole.

Optionally, the cover case further includes a support rib for connecting the hollow part and the transverse main body, and a limit hole is formed on the support rib, and a limit column matched with the limit hole is formed on the surface of the front panel facing the cover case.

Optionally, a plurality of third engaging grooves are provided on the lateral body, and a plurality of third engaging portions which are matched with the third engaging grooves in a one-to-one correspondence are formed on the surface of the front panel facing the casing.

Optionally, a heat exchange airflow outlet that opens forward and downward is formed at the connection between the bottom wall plate and the transverse main body.

In the wall-mounted air conditioner indoor unit of the present invention, the top of the cover is provided with an air intake grille, the front side of the air intake grille is provided with a plurality of first clamping grooves along its transverse direction, and the surface of the front panel facing the cover is formed with multiple When the front panel is fixed to the front of the housing, the first latching part on the front panel extends into the first card slot on the front side of the air grille, so that not only the front panel can be connected to the air inlet. The grilles are stretched toward each other to narrow the flash gap between the two, so that the connection between the front panel and the cover is more firm and beautiful, and the first clamping part can also be used to stretch the grille in the direction of the front panel to prevent entry. The air grille sags to the middle of the center to ensure the normal appearance of the air intake grille.

Further, in the wall-mounted air conditioner indoor unit of the present invention, since each first card slot is opened downward, after the front panel is fixed with the cover, the first engaging portion will be locked into the first card slot from bottom to top. In this way, the air intake grille can be lifted up by the first clipping portion, which further provides strength support for the air intake grille and ensures that the air intake grille is not deformed.

Further, in the wall-mounted air conditioner indoor unit of the present invention, the two connecting parts of the cover are respectively provided with second clamping grooves, and the surface of the front panel facing the cover is formed with two second clamping parts. The transverse main body is provided with a plurality of third clamping grooves, and the surface of the front panel facing the casing is formed with a plurality of third clamping portions matched with the third clamping grooves in a one-to-one correspondence. During assembly, the two second snap portions are matched with the two second snap slots in a one-to-one correspondence, and the multiple third snap portions are matched with the multiple third snap portions in a one-to-one correspondence. The panel is mounted on the housing.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic diagram of a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

2 is an exploded view of an air duct frame, an evaporator and a cross-flow fan in a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

3 is an exploded view of a front panel, a cover and an air duct frame in a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

4 is a schematic diagram of a housing from a viewing angle in a wall-mounted air conditioner indoor unit according to an embodiment of the present invention, showing the front structure of the housing;

FIG. 5 is an enlarged view of part A of the cover shown in FIG. 4, wherein a first card slot is shown;

6 is a schematic diagram of a housing from another viewing angle in a wall-mounted air conditioner indoor unit according to an embodiment of the present invention, showing the internal structure of the housing;

FIG. 7 is an enlarged view of part B of the cover shown in FIG. 6 , wherein a second card slot is shown;

8 is a schematic diagram of a front panel in a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

FIG. 9 is an enlarged view of the C part of the front panel shown in FIG. 8 , wherein a first clamping part is shown;

Fig. 10 is an enlarged view of the D portion of the front panel shown in Fig. 8, wherein a second clamping portion is shown;

FIG. 11 is an enlarged view of the E part of the front panel shown in FIG. 8 , wherein the limiting column is shown;

Fig. 12 is an enlarged view of the F portion of the front panel shown in Fig. 8, wherein the buckle is shown;

FIG. 13 is an enlarged view of the G part of the front panel shown in FIG. 8 , wherein a third clamping part is shown.

Detailed ways

In the description of this embodiment, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientation or placement relationship indicated by "left", "right", "vertical", "horizontal", "top", "bottom", "depth", etc. is based on the orientation of the wall-mounted air conditioner indoor unit 1 in the normal use state. Reference can be made to, and with reference to, the orientation or positional relationship shown in the drawings, eg, "front" indicating orientation refers to the side facing the user. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

Referring to FIGS. 1 to 3, FIG. 1 is a schematic diagram of a wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention, and FIG. 2 is a wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention. FIG. 3 is an exploded view of the front panel 50 , the cover 10 and the air duct frame 20 in the wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention.

The utility model provides a wall-mounted air conditioner indoor unit 1 , and the wall-mounted air conditioner indoor unit 1 may generally include a casing 10 , an air duct frame 20 , an evaporator 30 and a cross-flow fan 40 .

The cover 10 protects the entire wall-mounted air conditioner indoor unit 1, and the top of the cover 10 is provided with an air intake grille 110, and a heat exchange airflow inlet 12 is formed on the air intake grille 110. Hot air outlet 14 .

The air duct frame 20 is arranged inside the casing 10, and a heat exchange air duct 222 extending in the lateral direction is formed on the air duct frame 20. The air outlet side of the hot air outlet 14 .

The evaporator 30 is installed on the air duct frame 20 and covers the top of the heat exchange air duct 222 to exchange heat with the air sucked into the housing 10 from the heat exchange airflow inlet 12, and the air after heat exchange passes through the air duct frame. The air outlet side of 20 and the heat exchange airflow outlet 14 of the casing 10 are discharged into the room to realize cooling or heating.

The cross-flow fan 40 is installed in the heat exchange air duct 222 in the lateral direction, and is used to promote the indoor air flow from the heat exchange air flow inlet 12 to enter the casing 10 to exchange heat with the evaporator 30 , and finally discharge from the heat exchange air flow outlet 14 .

In some embodiments, the wall-mounted air conditioner indoor unit 1 may further include a front panel 50 , and the front panel 50 is detachably fixed to the front side of the housing 10 to decorate and protect the wall-mounted air conditioner indoor unit 1 .

Referring to FIGS. 4 , 5 , 8 and 9 , FIG. 4 is a schematic diagram of the housing 10 from a viewing angle in the wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention, which shows the front of the housing 10 5 is an enlarged view of part A of the housing 10 shown in FIG. 4, which shows a first card slot 116, and FIG. 8 is a front panel 50 in the wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention. FIG. 9 is an enlarged view of the C part of the front panel 50 shown in FIG. 8 , which shows a first clamping part 51 .

Further, the front side of the air inlet grille 110 is provided with a plurality of first snap grooves 116 along its transverse direction, and a plurality of first snap portions 51 are formed on the surface of the front panel 50 facing the housing 10 . The first snap portions 51 It is configured such that when the front panel 50 is fixed to the housing 10 , it is matched with the first locking grooves 116 in a one-to-one correspondence, so as to fasten the air inlet grille 110 .

In this embodiment, the front panel 50 is connected to the housing 10 by a detachable connection, for example, a snap connection, a screw connection, a tenon connection and the like. When the front panel 50 is fixed to the front of the housing 10 , the first engaging portion 51 on the front panel 50 extends into the first engaging slot 116 on the front side of the air grill 110 to connect the front panel 50 to the air intake grill 110 is fastened.

As described in the background art section, once there is a certain error between the lateral length of the front panel 50 and the lateral length of the casing 10 (for example, when the lateral length of the front panel 50 is greater than the lateral length of the casing 10 ), the distance between the two after assembly Create flash.

In this embodiment, the first clamping portion 51 is matched with the first clamping slot 116 , so that the front panel 50 and the air inlet grille 110 can be stretched toward each other, and the flash gap can be narrowed, so that the front panel 50 and the housing 10 can be connected. The connection is stronger and more beautiful.

In addition, since the heat exchange airflow inlet 12 needs to be opened on the air intake grille 110, the strength of the air intake grille 110 is relatively weak, and the air intake grille 110 may experience aging deformation and stress relaxation after long-term operation , the middle will sag.

In the present embodiment, since the first card slot 116 is installed on the front side of the air inlet grille 110 , after the first engaging portion 51 is engaged with the first engaging groove 116 , the first engaging portion 51 can be pulled forward. Extending the air intake grille 110 prevents the air intake grille 110 from sagging toward the center of the center, and ensures the normal appearance of the air intake grille 110. The technical effect has been verified in trial products.

In some embodiments, each of the first card slots 116 is opened downward, and when the first engaging portions 51 are engaged with the first engaging grooves 116 , the first engaging portions 51 extend into the first engaging grooves from bottom to top. 116 to lift the inlet grille 110 upward.

As mentioned above, the strength of the air inlet grille 110 is relatively weak, and in this embodiment, since the first locking groove 116 is opened downward, when the front panel 50 is fixed to the housing 10 , the first locking portion 51 will be snapped into the first card slot 116 from bottom to top, so that the air inlet grille 110 can be lifted upward by the first engaging portion 51, which further provides strength support for the air inlet grille 110 and ensures the air intake grille 110 Will not deform.

Referring to FIG. 4 , in some embodiments, the air inlet grill 110 may further include a hollow portion 112 for forming the heat exchange airflow inlet 12 . Specifically, the hollow portion 112 may be located at the lateral center of the air inlet grill 110 , and may be formed by a plurality of cross-arranged support beams to form the heat exchange airflow inlet 12 .

The number of the first card slots 116 may also be two, and the two first card slots 116 are disposed on the front side of the hollow portion 112 . Since the hollow portion 112 is provided with the heat exchange airflow inlet 12 , it is more reasonable to dispose the first locking groove 116 on the front side of the hollow portion 112 , which can specifically improve the overall strength of the air inlet grille 110 .

Further, the ratio between the distance between the two first card slots 116 and the lateral length of the hollow portion 112 is between 1/4 and 3/4, such as 1/4, 1/2, 3/4 and the like. The above-mentioned limitation makes the two first clamping grooves 116 more reasonable, so that when the first clamping portion 51 is evenly stretched and lifted into the air grille 110 .

Referring to FIG. 4 and FIG. 6 , FIG. 6 is a schematic diagram of the casing 10 from another viewing angle in the wall-mounted air conditioner indoor unit 1 according to an embodiment of the present invention, which shows the internal structure of the casing 10 . In some embodiments, the air intake grill 110 has two fixing portions 114 connected to two lateral ends of the hollow portion 112 . The casing 10 may further include a front frame 120, a bottom wall panel 140 and two side wall panels 130, the front frame 120 includes two connecting parts 122 extending downward from the front sides of the two fixing parts 114, respectively; The lateral main body 124 connected to the ends of the two connecting portions 122 laterally, the two side wall panels 130 extend downward from the side portions of the two fixing portions 114 respectively, and the bottom wall panel 140 is horizontally connected to the ends of the two side wall panels 130 therebetween, and the front end of the bottom wall panel 140 is connected to the bottom portion of the lateral body 124 .

That is, the air intake grill 110 , the bottom wall panel 140 , the two front frames 120 and the two side wall panels 130 may together form the enclosure 10 to accommodate other components.

Further, a heat exchange airflow outlet 14 opened forward and downward is formed at the connection between the bottom wall plate 140 and the lateral body 124 .

Referring to FIGS. 6 , 7 , 8 and 10 , FIG. 7 is an enlarged view of the B part of the housing 10 shown in FIG. 6 , which shows a second slot 126 , and FIG. 10 is the front panel 50 shown in FIG. 8 . The enlarged view of part D of , which shows a second clamping part 52 .

In some embodiments, the connecting portion 122 of each front frame 120 is respectively provided with a second engaging slot 126 , and the surface of the front panel 50 facing the housing 10 is formed with two second engaging portions 52 . The portions 52 are matched with the second slots 126 in a one-to-one correspondence, so as to fix the front panel 50 to the housing 10 .

Referring to FIGS. 4 , 6 and 7 , specifically, the connecting portion 122 is provided with a second card slot 126 in the interior of the connecting portion 122 away from the front panel 50 . The portion 122 forms a card interface 127 (as shown in FIG. 4 ) at the position between the two snap plates 126 a . When the front panel 50 is fixed to the housing 10 , the second snap portion 52 extends from the card interface 127 of the connection portion 122 . into it and engage with the second card slot 126 .

Referring to FIGS. 7 and 10 , further, each second engaging slot 126 has a positioning hole 126b, and each second engaging portion 52 has a positioning pin 52a. When the second engaging portion 52 is matched with the second engaging slot 126 , the positioning pin 52a extends into the positioning hole 126b.

Specifically, the positioning hole 126b can be opened on one of the clamping plates 126a. During the process of the second clamping portion 52 extending into the second clamping slot 126, the positioning pin 52a on the second clamping portion 52 can make the two Each of the clamping plates 126a is elastically deformed until the positioning pin 52a enters the positioning hole 126b, the second clamping portion 52 returns to its original shape, and the second clamping portion 52 is engaged with the second clamping slot 126, so that the positioning pin 52a and the second clamping portion 52 are engaged with each other. With the cooperation of the positioning holes 126b, the connection between the second engaging portion 52 and the second engaging slot 126 is more stable, the second engaging portion 52 is not easy to fall off, and the reliability is improved.

Referring to FIGS. 4 , 5 and 11 , FIG. 11 is an enlarged view of the E portion of the front panel 50 shown in FIG. 8 , wherein the limiting posts 54 are shown. In some embodiments, the cover 10 further includes a support rib 150 for connecting the hollow portion 112 and the lateral body 124 , and a limiting hole 152 is formed on the support rib 150 , and a surface of the front panel 50 facing the cover 10 is formed and limited The hole 152 is matched with the limit post 54 .

The support rib 150 can extend forward from the center of the rear end of the hollow portion 112 , and then extend downward to be connected with the lateral body 124 .

The side of the support rib 150 facing the front panel 50 is provided with a limit hole 152 , and the inner side of the front panel 50 is provided with a limit post 54 . position for easy assembly.

Referring to FIG. 12, FIG. 12 is an enlarged view of the F portion of the front panel 50 shown in FIG. 8, wherein the buckle 55 is shown. In addition, the front panel 50 can also be provided with a buckle 55 for limiting the position of the support rib 150 , and the buckle 55 can further limit the position of the support rib 150 to improve installation efficiency and stability.

Referring to FIGS. 4 and 13 , FIG. 13 is an enlarged view of the G part of the front panel 50 shown in FIG. 8 , wherein a third clamping part 53 is shown. In some embodiments, the lateral main body 124 is provided with a plurality of third locking grooves 128 , and the surface of the front panel 50 facing the housing 10 is formed with a plurality of third locking portions 53 corresponding to the third locking grooves 128 in one-to-one correspondence. During assembly, the third engaging slot 128 is matched with the third engaging portion 53 to further fix the front panel 50 and the cover 10 .

In the wall-mounted air conditioner indoor unit 1 of the present invention, the top of the casing 10 is provided with an air intake grille 110 , and a plurality of first card slots 116 are arranged on the front side of the air intake grille 110 along its transverse direction, and the front panel 50 faces the cover. A plurality of first engaging portions 51 are formed on the surface of the casing 10 . When the front panel 50 is fixed to the front of the housing 10 , the first engaging portions 51 on the front panel 50 protrude into the first engaging portions on the front side of the air grill 110 . In the slot 116, not only can the front panel 50 and the air inlet grille 110 be stretched toward each other, and the flash gap between the two can be narrowed, so that the connection between the front panel 50 and the cover 10 is more firm and beautiful, and the first A snap portion 51 stretches the air intake grill 110 in the direction of the front panel 50 to prevent the air intake grill 110 from sagging toward the center, and to ensure the normal appearance of the air intake grill 110 .

Further, in the wall-mounted air conditioner indoor unit 1 of the present invention, since each of the first card slots 116 is opened downward, after the front panel 50 is fixed to the housing 10, the first engaging portion 51 will move upward from the bottom to the top. The air inlet grille 110 can be lifted up by the first clamping portion 51, which further provides a strong support for the air inlet grille 110 and ensures that the air inlet grille 110 is not deformed.

Further, in the wall-mounted air conditioner indoor unit 1 of the present invention, the two connecting portions 122 of the casing 10 are respectively provided with second card slots 126 , and the surface of the front panel 50 facing the casing 10 is formed with two second card slots 126 . The connecting portion 52, the lateral main body 124 of the casing 10 is provided with a plurality of third engaging grooves 128, and the surface of the front panel 50 facing the casing 10 is formed with a plurality of third engaging portions corresponding to the third engaging grooves 128 in one-to-one correspondence. 53. During assembly, the two second engaging portions 52 are matched with the two second engaging slots 126 in one-to-one correspondence, and the plurality of third engaging portions 128 are matched with the multiple third engaging portions 53 in one-to-one correspondence. Implemented to mount the front panel 50 to the housing 10 .

By now, those skilled in the art will recognize that although various exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, Numerous other variations or modifications consistent with the principles of the present invention are directly identified or derived from the disclosure of the present invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A wall-mounted air conditioner indoor unit, comprising:

the top of the housing is provided with an air inlet grid;

a front panel detachably fixed to a front side of the housing; wherein

The front side of air-inlet grille transversely is provided with a plurality of first draw-in grooves along it, the front panel orientation the surface of housing is formed with a plurality of first joint portions, first joint portion configures into to be worked as the front panel is fixed in during the housing with first draw-in groove one-to-one cooperates, with the fastening air-inlet grille.

2. The wall-mounted air conditioning indoor unit of claim 1, wherein the air conditioning indoor unit is provided in a wall-mounted type

Every first draw-in groove opens downwards, works as first joint portion with during the cooperation of first draw-in groove, first joint portion stretches into from bottom to top in the first draw-in groove to upwards lift the air-inlet grille.

3. The wall-mounted air conditioning indoor unit of claim 1, wherein the air conditioning indoor unit is provided in a wall-mounted type

The air inlet grille comprises a hollow part for forming a heat exchange airflow inlet;

the number of the first clamping grooves is two, and the two first clamping grooves are arranged on the front side of the hollow portion.

4. The wall-mounted air conditioning indoor unit of claim 3, wherein the air conditioning indoor unit is provided in a wall-mounted type

The ratio of the distance between the two first clamping grooves to the transverse length of the hollow part is between 1/4 and 3/4.

5. The wall-mounted air conditioning indoor unit of claim 3, wherein the air conditioning indoor unit includes a fan unit

The air inlet grille is provided with two fixing parts connected to the two transverse ends of the hollow part;

the housing further comprises:

a front frame including two connection parts respectively extending downward from front sides of the two fixing parts, and a lateral body connected to ends of the two connection parts in a lateral direction;

the two side wall plates extend downwards from the side parts of the two fixing parts respectively;

a bottom wall panel connected horizontally between the ends of the two side wall panels and having a front end connected to the bottom portion of the transverse body.

6. The wall-mounted air conditioning indoor unit of claim 5, wherein the air conditioning indoor unit is provided with a guide member

Every set up a second draw-in groove on the connecting portion respectively, the front panel orientation the surface of housing is formed with two second joint portions, second joint portion with the cooperation of second draw-in groove one-to-one, in order to incite somebody to action the front panel is fixed in the housing.

7. The wall-mounted air conditioning indoor unit of claim 6, wherein the air conditioning indoor unit is provided with a heat exchanger

Each second clamping groove is provided with a positioning hole, each second clamping portion is provided with a positioning pin, and when the second clamping portions are matched with the second clamping grooves, the positioning pins stretch into the positioning holes.

8. The wall-mounted air conditioning indoor unit of claim 5, wherein the air conditioning indoor unit is provided with a guide member

The housing further comprises a support rib used for connecting the hollow part and the transverse main body, a limiting hole is formed in the support rib, and a limiting column matched with the limiting hole is formed on the surface, facing the housing, of the front panel.

9. The wall-mounted air conditioning indoor unit of claim 5, wherein the air conditioning indoor unit is provided with a guide member

The horizontal main part is provided with a plurality of third draw-in grooves, the front panel towards the surface of housing form with a plurality of third joint portion of third draw-in groove one-to-one cooperation.

10. The wall-mounted air conditioning indoor unit of claim 5, wherein the air conditioning indoor unit is provided with a guide member

And a heat exchange airflow outlet which is open towards the front lower part is formed at the joint of the bottom wall plate and the transverse main body.

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