Air conditioner indoor unit and heating and ventilation system

Abstract

The utility model discloses an air conditioner indoor unit and a heating and ventilation system, and relates to the technical field of heating and ventilation systems.The air conditioner indoor unit comprises a machine shell, a main water pan, a heat exchanger and an auxiliary water pan; the main water pan is located at the bottom of the machine shell. The heat exchanger is located in the machine shell and arranged above the main water pan, and the heat exchanger comprises two oppositely-arranged side plates and a heat exchange body connected between the two side plates. The main water pan is arranged on the side, facing the bottom of the machine shell, of the heat exchanger, the auxiliary water pan is arranged on the side, facing the bottom of the machine shell, of the heat exchanger and located between the main water pan and the heat exchanger, the auxiliary water pan comprises a water receiving groove body, the water receiving groove body is used for receiving condensate water falling from the heat exchange body, and a heat insulation layer is arranged between the water receiving groove body and the heat exchange body. According to the technical scheme, the heat insulation layer is arranged between the water receiving tank body and the heat exchange main body, so that contact between the auxiliary water receiving disc and the heat exchange main body can be reduced, and condensation generated on the outer side of the auxiliary water receiving disc is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of HVAC systems, and in particular to an air-conditioning indoor unit and a HVAC system. Background Art

[0002] The HVAC system covers many types of equipment, such as air conditioners, multi-split units, heat pumps, water heaters, etc., and the HVAC system includes indoor units and outdoor units. In the indoor unit, especially the ceiling unit, the evaporator will produce condensed water in the cooling mode, which will damage the electrical components if it drips onto them, and the condensed water dripping outside the ceiling unit will also affect the user experience.

[0003] In the related art, the air-conditioning indoor unit is provided with a water receiving pan to receive condensed water. The water receiving pan includes a main water receiving pan located at the bottom of the heat exchanger and an auxiliary water receiving pan located at the lower side of the heat exchanger. Usually, the auxiliary water receiving pan is directly covered on the heat exchanger and in large-scale contact with the heat exchanger to receive the condensed water generated by the heat exchanger. In this way, when the heat exchanger is used as a cold source, the contact heat transfer between the auxiliary water receiving pan and the heat exchanger will cause condensation on the outside of the auxiliary water receiving pan. The condensed water cannot gather in the main water receiving pan, but will directly drip into the interior of the air-conditioning indoor unit, thereby affecting the normal operation of various internal functional components such as electronic control components. Utility Model Content

[0004] The embodiments of the present application provide an air-conditioning indoor unit and a heating and ventilation system, which can reduce the phenomenon of condensation on the outer side of a secondary water receiving pan in the air-conditioning indoor unit dripping to the bottom of the casing.

[0005] In the first aspect, an embodiment of the present application provides an air-conditioning indoor unit, which includes a casing, a main water receiving pan, a heat exchanger and a secondary water receiving pan; the main water receiving pan is located at the bottom of the casing; the heat exchanger is located in the casing and is arranged above the main water receiving pan, wherein the heat exchanger includes two oppositely arranged side plates and a heat exchange main body connected between the two side plates; the secondary water receiving pan is arranged on the side of the heat exchanger facing the bottom of the casing, and is located between the main water receiving pan and the heat exchanger, wherein the secondary water receiving pan includes a water receiving trough body, the water receiving trough body is used to receive condensed water falling from the heat exchange main body, and an insulating layer is arranged between the water receiving trough body and the heat exchange main body.

[0006] In some embodiments, there is a gap between the water receiving trough body and the heat exchange body, wherein the gap forms the heat insulation layer.

[0007] In some of the embodiments, a heat insulating material layer is further included, and the heat insulating material layer is filled in the gap.

[0008] In some embodiments, the thermal insulation material layer is made of sponge.

[0009] In some embodiments, the auxiliary water receiving tray further includes a support portion connected to the water receiving trough body, the support portion abuts against a side of the heat exchange body facing the bottom of the casing to form the gap between the water receiving trough body and the heat exchange body.

[0010] In some embodiments, the auxiliary water receiving tray further includes a water diversion trough body, which is connected to the end of the water receiving trough body, and the water diversion trough body is used to collect condensed water in the water receiving trough body to the main water receiving tray.

[0011] In some embodiments, the water inlet trough body includes a trough body and a first connecting part and a second connecting part connected to the trough body, and the trough body is connected to the water receiving trough body; wherein the first connecting part is detachably connected to the casing, and the second connecting part is detachably connected to a corresponding side panel.

[0012] In some embodiments, the casing includes an outer shell and a chassis that are connected to each other, the main water receiving tray is located below the outer shell, and the chassis is connected between the outer shell and the main water receiving tray; one of the first connecting portion and the chassis is provided with a buckle, and the other is formed with a clamping hole, and the buckle is engaged with the clamping hole.

[0013] In some embodiments, the second connection portion is plugged into the side plate.

[0014] In some embodiments, the bottom of the tank body abuts against the main water receiving tray.

[0015] In a second aspect, an embodiment of the present application provides a HVAC system, which includes the air-conditioning indoor unit as described above.

[0016] The air-conditioning indoor unit based on the embodiment of the present application is provided with an auxiliary water receiving pan, and the auxiliary water receiving pan is located below the bottom of the heat exchange body of the heat exchanger facing the casing. During the cooling process of the air-conditioning indoor unit, part of the condensed water generated by the heat exchanger may fall directly under the action of gravity, and the water receiving trough body in the auxiliary water receiving pan can receive this part of the condensed water that falls directly. The present application further provides a heat insulation layer between the water receiving trough body of the auxiliary water receiving pan and the heat exchange body of the heat exchanger. By providing the heat insulation layer, direct contact between the water receiving trough body and the heat exchange body is avoided, which can reduce the amount of cold of the heat exchange body received by the water receiving trough body, thereby reducing the possibility of condensation on the outer surface of the water receiving trough body to form condensed water. In this way, the probability of condensed water falling directly onto the bottom casing of the air-conditioning indoor unit is also reduced, thereby effectively preventing condensed water from dripping into the indoor installation environment of the air-conditioning indoor unit, improving the use comfort of the air-conditioning indoor unit, and preventing condensed water from accumulating at the bottom of the casing of the air-conditioning indoor unit, reducing the possibility of corrosion of the casing, and also being beneficial to the operation safety of electronic components in the air-conditioning indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a structural schematic diagram of an embodiment of an air-conditioning indoor unit of the present application;

[0019] Figure 2 for Figure 1 An exploded view of an indoor unit of an air conditioner is shown in FIG.

[0020] Figure 3 for Figure 1 A side view of an indoor unit of an air conditioner shown in FIG.

[0021] Figure 4 for Figure 1 Another side view of the air conditioner indoor unit shown in;

[0022] Figure 5 for Figure 1 A cross-sectional view of an indoor unit of an air conditioner shown in FIG.

[0023] Figure 6 for Figure 1 A schematic diagram of the structure of the auxiliary water receiving tray of the indoor unit of the air conditioner is shown in FIG.

[0024] Figure 7 for Figure 6 The enlarged view of point A in the middle;

[0025] Description of Figure Numbers:

[0026] 1. Air conditioner indoor unit; 10. Casing; 11. Outer shell; 12. Chassis; 121. Buckle; 13. Return air outlet; 20. Main water tray; 30. Heat exchanger; 31. Side plate; 32. Heat exchange main body; 40. Secondary water tray; 41. Water receiving trough body; 411. Connecting trough body; 412. Air passage; 42. Support part; 43. Water inlet trough body; 431. Trough main body; 432. First connecting part; 433. Second connecting part; 4321. Clamp hole; 50. Thermal insulation layer.

[0027] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0029] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0030] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] The HVAC system covers many types of equipment, such as air conditioners, multi-split units, heat pumps, water heaters, etc., and the HVAC system includes indoor units and outdoor units. In the indoor unit, especially the ceiling unit, the evaporator will produce condensed water in the cooling mode, which will damage the electrical components if it drips onto them, and the condensed water dripping outside the ceiling unit will also affect the user experience.

[0033] In the related art, the air-conditioning indoor unit is provided with a water receiving pan in direct contact with the heat exchanger to receive the condensed water generated by the heat exchanger. When the heat exchanger is the cold source, the contact heat transfer between the water receiving pan and the heat exchanger will cause condensation to be generated on the outside of the water receiving pan. The condensed water cannot be collected in the water receiving pan and will directly drip into the interior of the air-conditioning indoor unit, thereby affecting the normal operation of various internal functional components such as electronic control components.

[0034] To solve the above problems, please refer to Figures 1 to 3 In a first aspect of the present application, an air-conditioning indoor unit 1 is proposed. In an embodiment of the present application, the air-conditioning indoor unit 1 includes a casing 10, a main water receiving tray 20, a heat exchanger 30 and an auxiliary water receiving tray 40.

[0035] The casing 10 includes a connected outer shell 11 and a chassis 12. The casing 10 can be made of a high-strength material such as stainless steel and aluminum alloy to better protect the functional components arranged inside the casing 10. The main water receiving tray 20 is connected to the outer shell 11 and is located below the outer shell 11. The chassis 12 is connected between the outer shell 11 and the main water receiving tray 20. The main water receiving tray 20 is located at the bottom of the casing 10. The outer shell 11 and the chassis 12 can be connected in a detachable form, such as screw connection, clamping connection, etc., to facilitate maintenance of the internal components. Of course, the two can also be an integrated structure to improve the overall strength of the casing 10, and the present application does not limit this. Further, the casing 10 of the present application can also include a panel (not shown), which is connected to the bottom of the outer shell 11 and is located below the main water receiving tray 20. When the indoor unit of the air conditioner is a ceiling unit, in the indoor installation environment, an installation port is provided on the ceiling, and the panel is sealed at the installation port. The panel and the housing 10 cooperate to define an air duct, and a return air port 13 connected to the air duct is provided on the panel (see Figure 1 ) and air outlet.

[0036] The heat exchanger 30 is located in the housing 10 and in the air duct, wherein the heat exchanger 30 can be a single-fold plate heat exchanger or a multi-fold plate heat exchanger 30. In the case of a single-fold plate heat exchanger, the heat exchanger 30 is tilted above the main water tray 20, and the heat exchanger 30 of the present application is tilted above the return air port 13, and the horizontal projection of the heat exchanger 30 is at least partially located in the return air port 13. Specifically, Figure 3 , the angle θ between the heat exchanger 30 and the horizontal direction can be selected as 0°<θ≤45°. Here, the smaller the angle θ between the heat exchanger 30 and the horizontal direction, the smaller the thickness of the air conditioner indoor unit 1 can be, but the projected area of ​​the heat exchanger 30 on the return air outlet 13 will also become larger and larger, that is, the condensed water on the heat exchanger 30 will also be easier to drip out from the return air outlet 13. Therefore, the range of θ can be selected as 15°≤θ≤45°.

[0037] It is understandable that when the heat exchanger 30 is arranged in an arc shape or other forms, the heat exchanger 30 can also be arranged in a non-inclined manner, that is, the heat exchanger 30 can be arranged horizontally above the main water receiving tray 20 to adapt to its different structural forms, and the present application does not impose any restrictions on this.

[0038] When the air-conditioning indoor unit 1 is in cooling mode or dehumidification mode, the heat exchanger 30 is an evaporator. At this time, condensed water will be generated on the surface of the evaporator. The main water receiving tray 20 and the auxiliary water receiving tray 40 can collect and discharge the condensed water, thereby avoiding damage to the internal functional components of the air-conditioning indoor unit 1, such as electronic control components, caused by condensed water.

[0039] It should be noted that, in order to better receive the condensed water dripping downstream due to gravity on the heat exchanger 30, the auxiliary water receiving tray 40 is arranged on the side of the heat exchanger 30 facing the bottom of the casing 10, and is located between the main water receiving tray 20 and the heat exchanger 30. The heat exchanger 30 includes a heat exchange body 32 for exchanging heat with the airflow flowing into the air duct, and the auxiliary water receiving tray 40 includes a water receiving tank body 41, which is used to receive the condensed water falling from the heat exchange body 32. That is, the projection of the heat exchanger 30 on the horizontal plane falls into the projection area of ​​the main water receiving tray 20 and the auxiliary water receiving tray 40 on the horizontal plane. A part of the condensed water formed on the surface of the heat exchanger 30 flows along the surface of the main structure of the heat exchanger 30 to the bottom end of the heat exchanger 30 and enters the main water receiving tray 20. Since the heat exchanger 30 is inclined, another part of the condensed water will fall directly due to gravity. This part of the condensed water flows into the water receiving trough body 41 of the auxiliary water receiving tray 40. The condensed water in the auxiliary water receiving tray 40 can be discharged into the main water receiving tray 20, or directly discharged to the outside of the air-conditioning indoor unit 1 through a pipe. The present application does not impose any restrictions on this.

[0040] In addition, a heat preservation component (not shown) is attached to the surface of the main water receiving pan 20 on one side facing away from the heat exchanger 30. The heat preservation component can be made of a material with good water absorption and heat insulation, such as sponge or flannel. In this way, the covering of the heat preservation component prevents the condensed water accumulated inside the main water receiving pan 20 from having a good heat exchange with the outside air, and condensation is generated on the outside of the main water receiving pan 20. That is, the matching form of the main water receiving pan 20 and the auxiliary water receiving pan 40 of the present application ensures that the condensed water of the heat exchanger 30 can be effectively collected, and can prevent the overflow of the condensed water from causing safety hazards such as leakage of the air conditioner indoor unit 1. Furthermore, the present application also provides a heat insulation layer 50 between the water receiving tank body 41 and the heat exchange main body 32. The heat insulation layer 50 can effectively isolate the heat transfer between the heat exchange main body 32 and the water receiving tank body 41.

[0041] Please refer again Figure 2 The heat exchanger 30 includes two side plates 31 arranged opposite to each other, and a heat exchange body 32 is connected between the two side plates 31. The heat exchange body 32 is composed of heat exchange fins and heat exchange tubes. The heat exchange tubes are arranged in the heat exchange fins in the length direction. The heat exchange fins can expand the contact area between the external air and the refrigerant in the heat exchange tubes, thereby improving the heat exchange efficiency between the external air and the refrigerant. That is, the present application provides a heat insulation layer 50 between the water receiving tank body 41 and the heat exchange body 32, which can be understood as providing a heat insulation layer 50 between the outer surface of the heat exchange fins and the water receiving tank body 41.

[0042] In one embodiment, there is a gap between the water receiving tank body 41 and the heat exchange body 32, wherein the gap is formed as a heat insulation layer 50. That is, the gap can be used to achieve air insulation between the water receiving tank body 41 and the heat exchange body 32. The direct contact between the water receiving tank body 41 and the heat exchange body 32 will cause the surface of the water receiving tank body 41 facing away from the heat exchange body 32 to generate condensation when it is cold. The condensation water cannot be collected in the water receiving tank body 41, but will directly drip along the outer surface of the water receiving tank body 41 into the air conditioner indoor unit 1, thereby affecting the normal operation of various internal functional components such as electronic control components. The gap between the water receiving tank body 41 and the heat exchange body 32 can reduce the generation of the above-mentioned condensation water, thereby further ensuring the working stability of the air conditioner indoor unit 1.

[0043] In order to further reduce the situation where the surface of the water receiving tank body 41 facing away from the heat exchange body 32 is cold and condenses, in one embodiment, it also includes a heat insulation material layer (not shown), which is filled in the above-mentioned gap. Optionally, the material of the heat insulation material layer is sponge, so that it can effectively isolate the contact between the water receiving tank body 41 and the heat exchange body 32, and prevent the collision caused by the gap between the two due to machine vibration during operation, thereby reducing the maintenance problem of the auxiliary water receiving tray 40 and the heat exchanger 30. Of course, the heat insulation material layer can also be selected from other materials, such as flannel, etc., and this application is not limited to this.

[0044] Please refer to Figures 5 to 7 The water receiving tank body 41 of the present application includes a plurality of water receiving shells, each of which forms a groove structure, the groove structure opening faces the heat exchange main body 32, and the plurality of water receiving shells are arranged at intervals in the width direction of the heat exchanger 30, and each water receiving shell extends in the length direction of the heat exchanger 30, and an air flow passage 412 is formed between two adjacent water receiving shells, so that the obstruction to the air flow flowing in from the return air port 13 can be reduced as much as possible. Further, in order to improve the structural strength of the entire auxiliary water receiving tray 40, the auxiliary water receiving tray 40 also includes a connecting tank body 411, which is connected to the water receiving tank body 41, wherein the connecting tank body 411 can be connected to the middle position of the water receiving tank body 41, wherein the connecting tank body 411 can guide the condensed water in the water receiving tank body 41 to the main water receiving tray 20, and the water receiving tank body 41 can also connect the plurality of water receiving shells in the water receiving tank body 41 into one, thereby improving the structural strength.

[0045] In addition, if Figure 5 and Figure 6As shown, the auxiliary water receiving tray 40 further includes a support portion 42 connected to the connecting groove body 411, and the support portion 42 abuts against the side of the heat exchange main body 32 facing the bottom of the casing 10, so that a gap is formed between the water receiving groove body 41 and the heat exchange main body 32. The support portion 42 can provide a supporting force for the auxiliary water receiving tray 40 in the width direction of the heat exchanger 30, and guide the condensed water generated on the heat exchanger 30.

[0046] The auxiliary water receiving tray 40 also includes a water trough body 43, which is connected to the end of the water receiving trough body 41. The water trough body 43 is used to collect condensed water in the water receiving trough body 41 to the main water receiving tray 20. The water trough body 43 and the water receiving trough body 41 can be an integrally formed structure to allow the condensed water to flow smoothly between the water trough body 43 and the water receiving trough body 41, thereby reducing water leakage and improving drainage efficiency.

[0047] Specifically, the water diversion tank body 43 includes a tank body 431 and a first connection portion 432 and a second connection portion 433 connected to the tank body 431, and the tank body 431 is connected to the water receiving tank body 41. The first connection portion 432 is detachably connected to the housing 10, and the second connection portion 433 is detachably connected to a side plate 31 corresponding to it.

[0048] Please refer to Figure 4 , as shown in the example, one of the first connection part 432 and the chassis 12 is provided with a buckle 121, and the other is formed with a clamping hole 4321, and the buckle 121 is engaged with the clamping hole 4321. Since the auxiliary water receiving tray 40 is arranged below the chassis 12, when the first connection part 432 is formed in the form of a clamping hole 4321 and engaged with the buckle 121 on the chassis 12, the auxiliary water receiving tray 40 can be hoisted on the chassis 12 in this detachable form. It can be understood that the detachable form of the first connection part 432 and the housing 10 can also be formed, for example, by material deformation of the two.

[0049] It can be understood that the second connection part 433 can be only arranged on one side of the auxiliary water receiving tray 40 in the length direction, so as to position the connection between the auxiliary water receiving tray 40 and the side plate 31 while saving production materials; or, the first connection part 432 and the second connection part 433 can also be arranged at both ends of the length direction of the auxiliary water receiving tray 40, thereby, after the first connection part 432 is detachably connected to the chassis 12, the second connection part 433 is plugged into the side plate 31, so as to fix the auxiliary water receiving tray 40 to the inside of the casing 10, realize the rapid installation and positioning of the auxiliary water receiving tray 40, and the detachable connection of the auxiliary water receiving tray 40 can also facilitate its cleaning, maintenance and replacement, saving maintenance costs.

[0050] In addition, the bottom of the groove body 431 abuts against the main water receiving tray 20. When the first connecting part 432 is detachably connected to the casing 10 and the second connecting part 433 is detachably connected to the side plate 31, the auxiliary water receiving tray 40 is hoisted in the casing 10, and the groove body 431 of the auxiliary water receiving tray 40 can abut against the main water receiving tray 20 at this time to support the lower part of the auxiliary water receiving tray 40, thereby realizing three-way support and limitation of the auxiliary water receiving tray 40, and better ensuring the installation stability of the auxiliary water receiving tray 40. In addition, some condensed water formed at the bottom of the groove body 431 can also flow into the main water receiving tray 20 by abutting against the main water receiving tray 20, which can also more effectively prevent the condensed water from dripping to the outside of the two water receiving trays.

[0051] In one embodiment, in order to more effectively and quickly discharge the condensed water collected in the main water receiving pan 20 outside the air conditioner indoor unit 1, the air conditioner indoor unit 1 further includes a water pump, and the water pump is connected to the main water receiving pan 20, so that the condensed water collected in the main water receiving pan 20 can be discharged outside the air conditioner indoor unit 1 through the water pump, thereby improving the drainage efficiency of the main water receiving pan 20. It is understandable that the main water receiving pan 20 can also adopt a gravity drainage method to achieve the discharge of the condensed water collected in the main water receiving pan 20 outside the air conditioner indoor unit 1. Of course, the above two methods can also be used for drainage at the same time, so that the condensed water in the main water receiving pan 20 can be more efficiently and quickly discharged outside the air conditioner indoor unit 1, so that the drainage efficiency of the main water receiving pan 20 can be further improved, and this application does not limit this.

[0052] The present application also proposes a HVAC system, which includes the air conditioner indoor unit 1 as described above, and the specific structure of the HVAC system refers to the above embodiment. Since the HVAC system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the above HVAC system includes but is not limited to air conditioners, multi-split units, heat pumps, water heaters and other equipment.

[0053] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0054] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioner indoor unit, characterized in that: include: chassis; A main water tray, located at the bottom of the housing; A heat exchanger is located in the housing and is disposed above the main water receiving tray, wherein the heat exchanger comprises two oppositely disposed side plates and a heat exchange body connected between the two side plates; and The auxiliary water receiving pan is arranged on the side of the heat exchanger facing the bottom of the casing and is located between the main water receiving pan and the heat exchanger, wherein the auxiliary water receiving pan includes a water receiving trough body, the water receiving trough body is used to receive condensed water falling from the heat exchange main body, and an insulation layer is arranged between the water receiving trough body and the heat exchange main body.

2. The air conditioner indoor unit according to claim 1, characterized in that: There is a gap between the water receiving tank body and the heat exchange main body, wherein the gap forms the heat insulation layer.

3. The air conditioner indoor unit according to claim 2, characterized in that: It also includes a heat insulating material layer, which fills the gap.

4. The air conditioner indoor unit according to claim 3, characterized in that: The material of the heat insulation material layer is sponge.

5. The air conditioner indoor unit according to claim 2, characterized in that: The auxiliary water receiving tray further includes a support portion connected to the water receiving tank body, wherein the support portion abuts against a side of the heat exchange body facing the bottom of the casing, so that the gap is formed between the water receiving tank body and the heat exchange body.

6. The air conditioner indoor unit according to any one of claims 2 to 5, characterized in that: The auxiliary water receiving tray further comprises a water diversion trough body, wherein the water diversion trough body is connected to the end of the water receiving trough body, and the water diversion trough body is used to collect condensed water in the water receiving trough body to the main water receiving tray.

7. The air conditioner indoor unit according to claim 6, characterized in that: The water diversion trough body comprises a trough body and a first connection part and a second connection part connected to the trough body, and the trough body is connected to the water receiving trough body; Wherein, the first connection portion is detachably connected to the housing, and the second connection portion is detachably connected to a corresponding side panel.

8. The air conditioner indoor unit according to claim 7, characterized in that: The housing comprises an outer shell and a bottom plate connected to each other, the main water receiving tray is located below the outer shell, and the bottom plate is connected between the outer shell and the main water receiving tray; One of the first connecting portion and the chassis is provided with a buckle, and the other is formed with a clamping hole, and the buckle is engaged with the clamping hole.

9. The air conditioner indoor unit according to claim 7, characterized in that: The second connecting portion is plugged into the side plate.

10. The air conditioner indoor unit according to claim 7, characterized in that: The bottom of the tank body abuts against the main water receiving tray.

11. A HVAC system, characterized in that: It comprises the air conditioner indoor unit as described in any one of claims 1 to 10.

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