Air conditioner indoor unit and heating and ventilation system

Abstract

The present application relates to the technical field of heating and ventilation systems, and discloses an air conditioner indoor unit and a heating and ventilation system. The air conditioner indoor unit comprises a housing, a primary drain pan, a heat exchanger, and a secondary drain pan; the primary drain pan is located at the bottom of the housing; the heat exchanger is located in the housing and arranged above the primary drain pan; the heat exchanger comprises two side plates arranged opposite to each other and a heat exchange main body connected between the two side plates; and the secondary drain pan is arranged on the side of the heat exchanger facing the bottom of the housing and is located between the primary drain pan and the heat exchanger; the secondary drain pan comprises a drain trough body, the drain trough body is configured to receive condensate water dripping down from the heat exchange main body, and a heat insulation layer is arranged between the drain trough body and the heat exchange main body.

Description

Air conditioning indoor unit and HVAC system

[0001] This application claims the priority of the Chinese patent application with application number 2024205987625 and application name “Air Conditioning Indoor Unit and HVAC System” filed with the State Intellectual Property Office on March 25, 2024; and the priority of the Chinese patent application with application number 2024205873408 and application name “Air Conditioning Indoor Unit and HVAC System”, all contents of which are incorporated by reference into this application. Technical Field

[0002] 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

[0003] HVAC systems encompass a wide range of equipment, including air conditioners, VRFs, heat pumps, and water heaters. These systems consist of both indoor and outdoor units. Indoor units, particularly ceiling units, produce condensation in their evaporators when in cooling mode. This condensation can damage electrical components if it drips onto them, and can also affect the user experience if it drips onto the outside of the unit.

[0004] In the related art, the air-conditioning indoor unit is provided with a water collecting pan to receive condensed water. The water collecting pan includes a main water collecting pan located at the bottom of the heat exchanger and an auxiliary water collecting pan located at the lower side of the heat exchanger. Usually, the auxiliary water collecting pan is directly covered on the heat exchanger and is in large contact with the heat exchanger to receive the condensed water generated by the heat exchanger. In this way, when the heat exchanger is the cold source, the contact heat transfer between the auxiliary water collecting pan and the heat exchanger will cause condensation to be generated on the outside of the auxiliary water collecting pan. The condensed water cannot be collected in the main water collecting 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. Summary of the Invention

[0005] 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 outside of the auxiliary water receiving pan in the air-conditioning indoor unit dripping to the bottom of the casing.

[0006] 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 configured to receive condensed water falling from the heat exchange main body, and an insulation layer is provided between the water receiving trough body and the heat exchange main body.

[0007] In some embodiments, there is a gap between the water receiving trough and the heat exchange body, wherein the gap forms the heat insulation layer.

[0008] In some embodiments, a heat insulating material layer is further included, and the heat insulating material layer is filled in the gap.

[0009] In some embodiments, the thermal insulation material layer is made of sponge.

[0010] 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 the side of the heat exchange body facing the bottom of the casing, so that the gap is formed between the water receiving trough body and the heat exchange body.

[0011] 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 configured to collect condensed water in the water receiving trough body to the main water receiving tray.

[0012] 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 one of the side panels corresponding to it.

[0013] 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 clip, and the other is formed with a clip hole, and the clip is engaged with the clip hole.

[0014] In some embodiments, the second connecting portion is plugged into the side panel.

[0015] In some embodiments, the bottom of the tank body abuts against the main water receiving tray.

[0016] In some embodiments, the housing includes side panels located on opposite sides of the heat exchanger along the length direction thereof, and the side panels cover edge portions of the auxiliary water receiving tray.

[0017] In some embodiments, an air duct is formed in the casing, the heat exchanger and the main water receiving tray are both located in the air duct, a first limiting structure is provided on the casing, and a second limiting structure is provided on the main water receiving tray, the first limiting structure is clamped and engaged with the upper end of the heat exchanger, the second limiting structure is abutted and engaged with the bottom end of the heat exchanger, and the first limiting structure and the second limiting structure cooperate to fix the heat exchanger in the air duct.

[0018] In some embodiments, the first limiting structure is provided on opposite sides of the heat exchanger along its length direction.

[0019] In some embodiments, the heat exchange body and / or the side plate are engaged with the first limiting structure, and the heat exchange body and / or the side plate are in abutment engagement with the second limiting structure.

[0020] In some embodiments, the first limiting structure has a receiving groove, and the heat exchange body and / or the side plate are clamped in the receiving groove.

[0021] In some embodiments, the first limiting structure has a limiting hole, and a positioning piece is provided on the side plate, and the positioning piece is inserted into the limiting hole.

[0022] In some embodiments, the second limiting structure includes a first protrusion, the first protrusion extends along the length direction of the heat exchange body, and the first protrusion abuts against the bottom end of the heat exchange body.

[0023] In some embodiments, the distance from the first limiting structure to the first protrusion is the same as the width of the heat exchanger.

[0024] In some embodiments, the heat exchanger is arranged obliquely above the main water receiving tray;

[0025] The second limiting structure also includes a second protrusion, which is arranged on opposite sides of the first protrusion along the length direction of the heat exchanger, and the second protrusion abuts against the side of the heat exchange body and / or the side plate facing the main water receiving tray.

[0026] In some embodiments, the housing, the first limiting structure, the first protrusion and the second protrusion together form an installation cavity, the heat exchanger is arranged in the installation cavity, and the peripheral sides of the heat exchanger are in contact with the inner wall of the installation cavity.

[0027] In some embodiments, a third limiting structure is further provided on the casing, and the third limiting structure is located on opposite sides of the heat exchanger along its length direction, and the third limiting structure contacts the opposite sides of the heat exchanger along its length direction.

[0028] In a second aspect, an embodiment of the present application provides a HVAC system, which includes the air-conditioning indoor unit as described above.

[0029] The air-conditioning indoor unit according to the embodiment of the present application is provided with an auxiliary water receiving pan, which 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 an 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 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

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0031] FIG1 is a schematic structural diagram of an embodiment of an air conditioner indoor unit of the present application;

[0032] FIG2 is an exploded view of the air conditioner indoor unit shown in FIG1 ;

[0033] FIG3 is a side view of the air conditioner indoor unit shown in FIG1 ;

[0034] FIG4 is another side view of the air conditioner indoor unit shown in FIG1 ;

[0035] FIG5 is a cross-sectional view of the air conditioner indoor unit shown in FIG1 ;

[0036] FIG6 is a schematic structural diagram of the auxiliary water receiving tray of the air conditioner indoor unit shown in FIG1 ;

[0037] FIG7 is an enlarged view of point A in FIG6 ;

[0038] FIG8 is a schematic structural diagram of an air-conditioning indoor unit according to another embodiment of the present application;

[0039] FIG9 is a schematic diagram of an exploded structure of an air conditioner indoor unit according to another embodiment of the present application;

[0040] FIG10 is a schematic structural diagram of a portion of a housing and a heat exchanger in another embodiment of the present application;

[0041] FIG11 is a schematic cross-sectional view of an indoor unit of an air conditioner according to another embodiment of the present application;

[0042] FIG12 is a schematic structural diagram of a main water receiving tray in another embodiment of the present application;

[0043] FIG13 is an enlarged structural diagram of point B in FIG12;

[0044] FIG14 is a schematic structural diagram of an air-conditioning indoor unit from a first perspective in another embodiment of the present application;

[0045] FIG15 is an enlarged structural diagram of point C in FIG14;

[0046] FIG16 is a schematic structural diagram of an air conditioner indoor unit from a second perspective in another embodiment of the present application;

[0047] FIG17 is a schematic structural diagram of a housing, a heat exchanger, and a secondary water receiving tray in another embodiment of the present application;

[0048] FIG18 is an enlarged structural diagram of point D in FIG17 .

[0049] Explanation of the accompanying figures: 1. Indoor unit of air conditioner; 10. Casing; 10a. Air duct; 11. Outer shell; 12. Chassis; 121. Buckle; 13. Return air outlet; 14. First limiting structure; 141. Accommodation slot; 15. Side panel; 16. Third limiting structure; 20. Main water receiving tray; 21. Second limiting structure; 211. First protrusion; 212. Second protrusion; 213. First surface; 214. Second surface; 30. Heat exchanger; 31. Side panel; 32. Heat exchanger body; 40. Auxiliary water receiving tray; 41. Water receiving trough body; 411. Connecting trough body; 412. Air passage; 42. Supporting part; 43. Water inlet trough body; 431. Trough body; 432. First connecting part; 433. Second connecting part; 4321. Clamping hole; 50. Thermal insulation layer; 61. Stopper; 62. Wind wheel; L1. Length direction; L2. Width direction.

[0050] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0052] When the following description refers to the accompanying 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 merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0053] In the description of this application, it should be understood that the terms "first", "second", etc. are configured only for descriptive purposes and are not to be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "plurality" 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 previous and subsequent associated objects are in an "or" relationship.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0055] HVAC systems encompass a wide range of equipment, including air conditioners, VRFs, heat pumps, and water heaters. These systems consist of both indoor and outdoor units. Indoor units, particularly ceiling units, produce condensation in their evaporators when in cooling mode. This condensation can damage electrical components if it drips onto them, and can also affect the user experience if it drips onto the outside of the unit.

[0056] In the related art, the air-conditioning indoor unit is provided with a water collecting pan in direct contact with the heat exchanger to receive the condensed water generated by the heat exchanger. In this way, when the heat exchanger is the cold source, the contact heat transfer between the water collecting pan and the heat exchanger will cause condensation to be generated on the outside of the water collecting pan. The condensed water cannot be collected in the water collecting 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.

[0057] To solve the above problems, please refer to Figures 1 to 3. The first aspect of this application proposes an air-conditioning indoor unit 1. In an embodiment of this 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.

[0058] The housing 10 includes a connected outer shell 11 and a chassis 12. The housing 10 can be made of a high-strength material such as stainless steel or aluminum alloy to better protect the functional components located within the housing 10. A main water tray 20 is connected to the outer shell 11 and located below the outer shell 11. The chassis 12 is connected between the outer shell 11 and the main water tray 20, and the main water tray 20 is located at the bottom of the housing 10. The outer shell 11 and the chassis 12 can be detachably connected, such as by screwing or snapping, to facilitate maintenance of the internal components. Of course, they can also be an integrally molded structure to enhance the overall strength of the housing 10, which is not limited in this application. Furthermore, the housing 10 of the present application can also include a panel (not shown) connected to the bottom of the outer shell 11 and located below the main water tray 20. If the air conditioner indoor unit is a ceiling-mounted unit, the panel is installed indoors in a ceiling-mounted environment, and the panel covers the installation opening. The panel and the housing 10 cooperate to define an air outlet duct, and the panel is provided with an air return port 13 (see FIG. 1 ) and an air supply port connected to the air outlet duct.

[0059] The heat exchanger 30 is located within the housing 10 and within the air duct. The heat exchanger 30 can be a single-fold plate heat exchanger or a multi-fold plate heat exchanger. In the case of a single-fold plate heat exchanger, the heat exchanger 30 is tilted above the main water tray 20. In this embodiment, the heat exchanger 30 is tilted above the return air inlet 13, with the horizontal projection of the heat exchanger 30 at least partially located within the return air inlet 13. Specifically, referring to FIG3 , the heat exchanger 30 can be positioned at an angle θ with the horizontal direction. The range of the angle θ can be selected to be 0° < θ ≤ 45°. Here, the smaller the angle θ between the heat exchanger 30 and the horizontal direction, the smaller the overall thickness of the air conditioner indoor unit 1 can be. However, the projected area of ​​the heat exchanger 30 on the return air inlet 13 will also increase, meaning that condensed water on the heat exchanger 30 will be more likely to drip out of the return air inlet 13. Therefore, the range of θ can be selected to be 15° ≤ θ ≤ 45°.

[0060] It is understandable that when the heat exchanger 30 is arranged in an arc shape or other form, 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. This application does not impose any restrictions on this.

[0061] 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 various functional components inside the air-conditioning indoor unit 1, such as electronic control components, caused by condensation water.

[0062] It should be noted that, in order to better receive condensed water that drips downstream from the heat exchanger 30 due to gravity, a secondary water receiving pan 40 is provided on the side of the heat exchanger 30 facing the bottom of the housing 10, and is located between the primary water receiving pan 20 and the heat exchanger 30. The heat exchanger 30 includes a heat exchange main body 32 configured to exchange heat with air flowing into the air inlet duct, and the secondary water receiving pan 40 includes a water receiving trough 41 configured to receive condensed water that drips from the heat exchange main 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 pan 20 and the auxiliary water receiving pan 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 pan 20. Since the heat exchanger 30 is set at an angle, the other part of the condensed water will fall directly under the factor of gravity. This part of the condensed water flows into the water receiving trough body 41 of the auxiliary water receiving pan 40. The condensed water in the auxiliary water receiving pan 40 can be discharged into the main water receiving pan 20, or it can be directly discharged to the outside of the air-conditioning indoor unit 1 through a pipe. This application does not impose any restrictions on this.

[0063] Furthermore, a heat-insulating component (not shown) is attached to the surface of the main water receiving pan 20 on the side facing away from the heat exchanger 30. The heat-insulating component can be made of a material with good water absorption and heat insulation properties, such as sponge or flannel. In this way, the covering of the heat-insulating component prevents the condensed water accumulated inside the main water receiving pan 20 from undergoing 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 combination 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 in the air-conditioning indoor unit 1. Furthermore, the present application also provides a heat-insulating layer 50 between the water receiving tank body 41 and the heat exchange main body 32. The heat-insulating layer 50 can effectively isolate the heat transfer between the heat exchange main body 32 and the water receiving tank body 41.

[0064] Referring again to Figure 2 , the heat exchanger 30 includes two opposing side plates 31, with a heat exchange body 32 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 longitudinally extended through the heat exchange fins. 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 an insulating layer 50 between the water receiving tank 41 and the heat exchange body 32. This can be understood as providing an insulating layer 50 between the outer surface of the heat exchange fins and the water receiving tank 41.

[0065] In one embodiment, there is a gap between the water receiving trough body 41 and the heat exchange main body 32, wherein the gap is formed as a heat insulation layer 50. That is, the gap can achieve air insulation between the water receiving trough body 41 and the heat exchange main body 32. The direct contact between the water receiving trough body 41 and the heat exchange main body 32 will cause the surface of the water receiving trough body 41 facing away from the heat exchange main body 32 to be cooled and produce condensation. This condensation water cannot be collected in the water receiving trough body 41, but will directly drip along the outer surface of the water receiving trough 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 trough body 41 and the heat exchange main 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.

[0066] In order to further reduce the possibility of condensation on the side of the water receiving trough body 41 facing away from the heat exchange body 32 when it is cold, in one embodiment, a heat insulation material layer (not shown) is included. The heat insulation material layer fills the above-mentioned gap. Optionally, the heat insulation material layer is made of sponge. This can effectively isolate the contact between the water receiving trough body 41 and the heat exchange body 32, while also preventing collisions caused by machine vibration and the gap between the two during operation, thereby reducing maintenance issues for 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.

[0067] 5 to 7 , the water receiving trough body 41 of the present application includes a plurality of water receiving shells, each of which forms a groove structure, the groove structure opening facing the heat exchange main body 32, and the plurality of water receiving shells are spaced apart in the width direction of the heat exchanger 30, and each water receiving shell extends in the length direction of the heat exchanger 30, so that an air flow channel 412 is formed between two adjacent water receiving shells, thereby minimizing the obstruction of the air flow flowing in from the return air port 13. Furthermore, 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 trough body 411, which is connected to the water receiving trough body 41, wherein the connecting trough body 411 can be connected to the middle position of the water receiving trough body 41, wherein the connecting trough body 411 can guide the condensed water in the water receiving trough body 41 to the main water receiving tray 20, and the water receiving trough body 41 can also connect the plurality of water receiving shells in the water receiving trough body 41 into one, thereby improving the structural strength.

[0068] 5 and 6 , the auxiliary water receiving pan 40 further includes a support portion 42 connected to the connecting trough 411. The support portion 42 abuts against the side of the heat exchange body 32 that faces the bottom of the casing 10, thereby forming a gap between the water receiving trough 41 and the heat exchange body 32. The support portion 42 provides support for the auxiliary water receiving pan 40 in the width direction of the heat exchanger 30 and guides condensed water generated on the heat exchanger 30.

[0069] The auxiliary water receiving tray 40 also includes a water inlet trough body 43, which is connected to the end of the water receiving trough body 41. The water inlet trough body 43 is configured to collect the condensed water in the water receiving trough body 41 to the main water receiving tray 20. The water inlet 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 inlet trough body 43 and the water receiving trough body 41, thereby reducing water leakage and improving drainage efficiency.

[0070] Specifically, the water diversion trough body 43 includes a trough body 431 and a first connecting portion 432 and a second connecting portion 433 connected to the trough body 431. The trough body 431 is connected to the water receiving trough body 41. The first connecting portion 432 is detachably connected to the housing 10, and the second connecting portion 433 is detachably connected to the corresponding side panel 31.

[0071] Referring to Figure 4 , as an example, one of the first connection portion 432 and the chassis 12 is provided with a latch 121, and the other is formed with a latch hole 4321. The latch 121 engages with the latch hole 4321. Because the auxiliary water tray 40 is disposed below the chassis 12, when the first connection portion 432 is formed as a latch hole 4321 and engages with the latch 121 on the chassis 12, the auxiliary water tray 40 can be detachably mounted on the chassis 12. It is understood that the detachable nature of the first connection portion 432 and the housing 10 can also be achieved, for example, by deformation of the materials of both.

[0072] It can be understood that the second connection part 433 can be arranged only 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, so that 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, thereby fixing the auxiliary water receiving tray 40 to the inside of the casing 10, realizing 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.

[0073] In addition, the bottom of the trough 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 trough body 431 of the auxiliary water receiving tray 40 can now abut against the main water receiving tray 20 to support the lower part of the auxiliary water receiving tray 40, thereby realizing three-dimensional support and limitation of the auxiliary water receiving tray 40, better ensuring the installation stability of the auxiliary water receiving tray 40, and the condensed water formed at the bottom of the trough body 431 can also flow into the main water receiving tray 20 by abutting against the main water receiving tray 20, thereby more effectively preventing the condensed water from dripping to the outside of the two water receiving trays.

[0074] In one embodiment, to more effectively and quickly drain the condensed water collected in the main water receiving pan 20 out of the air conditioner indoor unit 1, the air conditioner indoor unit 1 further includes a water pump, which is connected to the main water receiving pan 20. The water pump can then drain the condensed water collected in the main water receiving pan 20 out of the air conditioner indoor unit 1, thereby improving the drainage efficiency of the main water receiving pan 20. It is understood that the main water receiving pan 20 can also use gravity drainage to drain the condensed water collected in the main water receiving pan 20 out of the air conditioner indoor unit 1. Of course, both of the above drainage methods can also be used simultaneously to drain the condensed water in the main water receiving pan 20 more efficiently and quickly out of the air conditioner indoor unit 1, thereby further improving the drainage efficiency of the main water receiving pan 20. This is not limited in this application.

[0075] Referring to Figures 8 to 11 , in some embodiments, the housing 10 may further include a panel connected to the outer shell 11. The outer shell 11 has a cavity therein. The panel and the outer shell 11 cooperate to define an air duct 10a (as shown in Figure 14 ). In other words, a portion of the cavity also forms the air duct 10a, and the panel is provided with a return air inlet and an air supply inlet connected to the air duct 10a. The heat exchanger 30 and the main water tray 20 are both located within the air duct 10a, with the main water tray 20 located below the heat exchanger 30, and the panel is located below the main water tray 20.

[0076] Among them, a first limiting structure 14 is provided on the casing 10, and a second limiting structure 21 is provided on the main water receiving tray 20. The first limiting structure 14 is clamped and engaged with the upper end of the heat exchanger 30, and the second limiting structure 21 is abutted and engaged with the bottom end of the heat exchanger 30. The first limiting structure 14 and the second limiting structure 21 cooperate to fix the heat exchanger 30 in the air duct 10a, thereby reducing the movement of the heat exchanger 30 in the air duct 10a.

[0077] It should be noted that when installing the heat exchanger 30, the upper end of the heat exchanger 30 is first snapped or plugged into the first limiting structure 14 of the casing 10, and then the main water receiving tray 20 is installed, and the second limiting structure 21 on the main water receiving tray 20 is abutted against the bottom end of the heat exchanger 30, thereby completing the fixed installation of the heat exchanger 30. The embodiment of the present application sets a first limiting structure 14 on the casing 10 and a second limiting structure 21 on the main water receiving tray 20, so that the heat exchanger 30 can be fixed in the air duct 10a of the casing 10 under the limiting action of the first limiting structure 14 and the second limiting structure 21, thereby simplifying the installation method and installation steps of the heat exchanger 30 in the air-conditioning indoor unit 1. At the same time, an air duct 10a is formed in the casing 10, and air flow will flow in the air duct 10a. The heat exchanger 30 will also be affected by the air flow in the air duct 10a. This embodiment can improve the stability of the heat exchanger 30 and reduce the shaking of the heat exchanger 30 under the negative pressure of the air flow.

[0078] In addition, in the related art, the side panels of the heat exchanger 30 are usually provided with fixing ears that extend out of the heat exchanger 30 body so that the heat exchanger 30 can be fixed with screws. However, the presence of the fixing ears makes it impossible to produce the heat exchanger 30 using a one-piece cutting process, resulting in low production efficiency of the heat exchanger 30. In the embodiment of the present application, the heat exchanger 30 is fixed and installed by limiting the housing 10 and the main water tray 20. This embodiment changes the installation method of the heat exchanger 30 to reduce the production materials and assembly operations of the heat exchanger 30, thereby improving the manufacturability of the heat exchanger 30. At the same time, eliminating the setting of the fixing ears on the heat exchanger 30 can also avoid the problem of the fixing ears being damaged and deformed during the turnover and transportation of the heat exchanger 30.

[0079] In some embodiments of the present application, first limiting structures 14 are provided on opposite sides of the heat exchanger 30 along the length direction L1 thereof.

[0080] Specifically, the first limiting structure 14 engages with the upper end of the heat exchanger 30 and can be disposed on opposite sides of the heat exchanger 30 along the longitudinal direction L1 of the heat exchanger 30. That is, the first limiting structure 14 engages with opposite ends of the upper portion of the heat exchanger 30 to secure the upper end of the heat exchanger 30. Compared to extending the first limiting structure 14 along the longitudinal direction L1 of the heat exchanger 30, this embodiment only provides the first limiting structure 14 on opposite sides of the heat exchanger 30. This can reduce the amount of material used in the production of the first limiting structure 14 and reduce the amount of airflow blocked by the first limiting structure 14 in the air duct 10a, allowing the heat exchanger 30 to exchange more airflow in the air duct 10a. As shown in FIG8 , the housing 10 is generally rectangular in shape, and the heat exchanger 30 is disposed within the housing 10 in an elongated strip shape, i.e., the longitudinal direction L1 of the heat exchanger 30 is the same as the longitudinal direction L1 of the housing 10.

[0081] Please refer to Figure 11. In some embodiments of the present application, the heat exchanger 30 includes a heat exchange body 32 and a side plate 31 that are connected to each other. The heat exchange body 32 and / or the side plate 31 are clamped and matched with the first limiting structure 14, and the heat exchange body 32 and / or the side plate 31 are abutted and matched with the second limiting structure 21.

[0082] It can be understood that the first limiting structure 14 can clamp the heat exchange body 32 of the fixed heat exchanger 30, or can clamp the side plate 31 of the fixed heat exchanger 30, or can clamp the heat exchange body 32 and the side plate 31 of the fixed heat exchanger 30 at the same time; similarly, the second limiting structure 21 can be fixed in abutment with the heat exchange body 32 of the heat exchanger 30, or can be fixed in abutment with the side plate 31 of the heat exchanger 30, or can be fixed in abutment with the heat exchange body 32 and the side plate 31 of the heat exchanger 30 at the same time, and can be selected and set according to actual conditions.

[0083] The side panels 31 can be made of plastic or metal to ensure that the side panels 31 have a certain strength. Optionally, the side panels 31 are made by injection molding, or are made by stretching and stamping metal plates.

[0084] Further, referring to FIG. 9 to FIG. 13 , in some embodiments of the present application, the first limiting structure 14 has a receiving groove 141 , and the heat exchange body 32 and / or the side plate 31 are clamped in the receiving groove 141 .

[0085] For example, the upper end of the heat exchange body 32 is engaged with the receiving groove 141. The walls of the receiving groove 141 contact the top and side walls of the upper end of the heat exchange body 32, and limit the heat exchange body 32 along the width direction L2 of the heat exchange body 32 to prevent the heat exchanger 30 from moving in the width direction L2 of the heat exchange body 32. Similarly, the upper end of the side plate 31 is engaged with the receiving groove 141. The walls of the receiving groove 141 contact the top and side walls of the upper end of the side plate 31, and limit the side plate 31 along the width direction L2 of the heat exchange body 32 to prevent the heat exchanger 30 from moving in the width direction L2 of the heat exchange body 32. Among them, if the heat exchanger 30 is set vertically, the width direction L2 of the heat exchange body 32 refers to the height of the heat exchanger 30; if the heat exchanger 30 is set inclined, the width direction L2 of the heat exchange body 32 refers to the extension direction of the inclined line from the upper end of the heat exchanger 30 to the lower end of the heat exchanger 30.

[0086] Alternatively, in some embodiments of the present application, the first limiting structure 14 has a limiting hole, and a positioning member is provided on the side plate 31, and the positioning member is inserted into the limiting hole to limit the entire heat exchanger 30. The first limiting structure 14 can abut the top of the side plate 31 in the width direction L2 of the heat exchange body 32, and the positioning member is inserted into the limiting hole. It can also limit the movement of the heat exchanger 30 in the length direction L1 of the heat exchange body 32, thereby further limiting the heat exchanger 30. Among them, this embodiment does not specifically limit the preparation material and shape of the positioning column. For example, the positioning column can be made of a metal or plastic material with relatively high strength, and the shape of the positioning column can be a square column or a cylinder.

[0087] Please continue to refer to Figures 9 and 10. In some embodiments of the present application, a third limiting structure 15 is further provided on the casing 10. In the length direction L1 of the heat exchanger 30, the third limiting structure 15 is provided on the opposite sides of the heat exchanger 30. When the heat exchanger 30 is installed on the casing 10, the third limiting structure 15 is in contact with the opposite sides of the heat exchanger 30 along the length direction L1 of the heat exchanger 30, thereby providing a limiting effect on the heat exchanger 30 in the length direction L1 of the heat exchanger 30, preventing the heat exchanger 30 from being displaced in the length direction L1 of the heat exchanger 30.

[0088] Among them, the side plate 31 of the heat exchanger 30 can be located on the side of the heat exchange body 32 close to the main water receiving tray 20, that is, the side of the heat exchange body 32 close to the casing 10 can be in contact and limited with the third limiting structure 15; or, the third limiting structure 15 can also be in contact and limited with the side plate 31, which is not specifically limited here.

[0089] Referring to Figures 11 to 13 , in some embodiments of the present application, the second retaining structure 21 includes a first protrusion 211. The first protrusion 211 extends along the length direction L1 of the heat exchange body 32 (as shown in Figure 2 ). The first protrusion 211 abuts the bottom end of the heat exchange body 32 to provide support for the bottom of the heat exchanger 30 and limit the heat exchanger 30 from sliding under the action of gravity. It is easy to understand that the distance from the first retaining structure 14 to the first protrusion 211 is the same as the width of the heat exchanger 30, thereby improving the reliability of the heat exchanger 30 installed between the first retaining structure 14 and the first protrusion 20.

[0090] Please refer to Figures 11, 14 and 15. In some embodiments of the present application, the heat exchanger 30 is tilted above the main water receiving tray 20, that is, the line connecting the upper end and the lower end of the heat exchanger 30 is set at an angle to the vertical.

[0091] Specifically, the heat exchanger 30 is arranged in the air duct 10a of the casing 10, the upper end of the heat exchanger 30 is limited by the first limiting structure 14 on the casing 10, the main water receiving tray 20 is located below the heat exchanger 30, and the lower end of the heat exchanger 30 is limited by the second limiting structure 21 on the main water receiving tray 20. Since the heat exchanger 30 is arranged at an angle, the heat exchanger 30 has a movement trend toward the main water receiving tray 20. In the embodiment of the present application, the second limiting structure 21 further includes a second protrusion 212, and the second limiting structure 21 further includes a second protrusion 213. The second protrusions 212 abut against the side of the heat exchange body 32 and / or the side plate 31 facing the main water receiving tray 20, that is, the second protrusions 212 abut against the inclined side of the heat exchanger 30, so that the second protrusions 212 provide support for the heat exchanger 30, thereby making the arrangement of the heat exchanger 30 more stable, and the second protrusions 212 are arranged on opposite sides of the first protrusion 211 along the length direction L1 of the heat exchange body 32, so that the opposite sides of the heat exchanger 30 can be supported.

[0092] In some embodiments of the present application, the housing 10, the first limiting structure 14, the first protrusion 211 and the second protrusion 212 jointly form an installation cavity (not shown in the figure), and the heat exchanger 30 is arranged in the installation cavity, wherein the inner side wall of the installation cavity is formed by the side wall of the housing 10, the first limiting structure 14, the first protrusion 211 and the second protrusion 212, and the inner side wall of the installation cavity is in contact with the peripheral side of the heat exchanger 30, that is, the shape of the installation cavity is adapted to the shape of the heat exchanger, thereby improving the installation reliability of the heat exchanger 30 in the installation cavity.

[0093] As shown in Figures 13 and 15, the first protrusion 211 has a first surface 213 configured to abut against the bottom end of the heat exchange body 32, and the second protrusion 212 has a second surface 214 configured to abut against the side of the side plate 31 facing the main water receiving tray 20. The first surface 213 and the second surface 214 define a placement space to provide a limit for the heat exchanger 30.

[0094] To further enhance the stability of the heat exchanger 30 , in some embodiments, referring to FIG. 14 to FIG. 18 , a stopper 61 is provided between the housing 10 and the heat exchanger 30 , and the stopper 61 abuts against a side of the heat exchanger 30 facing away from the main water receiving tray 20 . It can be understood that the stop portion 61 is located on the side of the heat exchanger 30 away from the main water receiving tray 20, and the second protrusion 212 is located on the side of the heat exchanger 30 close to the main water receiving tray 20, and the stop portion 61 and the second protrusion 212 are both in contact with the side of the heat exchanger 30, that is, the stop portion 61 and the second protrusion 212 are relatively arranged on both sides of the heat exchanger 30, and at the same time, the first protrusion 211 is arranged at the bottom end of the heat exchanger 30, so that the stop portion 61, the first protrusion 211 and the second protrusion 212 are jointly enclosed to form a clamping space, and the bottom end of the heat exchanger 30 is located in the clamping space. Even if there is airflow in the air duct 10a that generates negative pressure on the heat exchanger 30, the position of the heat exchanger 30 can be more stable, thereby reducing the shaking of the heat exchanger 30.

[0095] As shown in FIG16 , a wind wheel 62 is further provided in the casing 10. The wind wheel 62 is located on one side of the heat exchanger 30. When there is only one wind wheel 62, a motor is provided on one side of the wind wheel 62, and a stopper 61 is provided on the other side. When there are multiple wind wheels 62, two adjacent wind wheels 62 are connected by a coupling, and the stopper 61 is provided on the coupling.

[0096] In some embodiments of the present application, the casing 10 includes side panels 15 (as shown in FIG8 ) located on opposite sides of the heat exchanger 30 along its length direction L1, and the side panels 15 cover the edge portion of the auxiliary water receiving tray 40. That is, part of the side panels 15 can press the edge portion of the auxiliary water receiving tray 40 close to the side panels 15 to limit the auxiliary water receiving tray 40 and reduce the possibility of the auxiliary water receiving tray 40 becoming loose.

[0097] Among them, when assembling the air-conditioning indoor unit 1, the upper end of the heat exchanger 30 can be first clamped into the first limiting structure 14 of the casing 10, and then the bottom end of the auxiliary water receiving tray 40 can be installed on the casing 10, and the second connecting part 433 on the auxiliary water receiving tray 40 can be plugged into the through hole on the side panel 31. At this time, the edge part of the auxiliary water receiving tray 40 close to the side panel 15 is pressed by the side panel 15, and then the second limiting part on the main water receiving tray 20 is aligned with the bottom end of the heat exchanger 30, and the main water receiving tray 20 is connected and fixed to the side panel 15, thereby completing the assembly of the air-conditioning indoor unit 1.

[0098] This application also provides a heating and ventilation system, which includes the air conditioner indoor unit 1 described above. The specific structure of the heating and ventilation system is based on the above-mentioned embodiments. Since this heating and ventilation system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here. The above-mentioned heating and ventilation system includes but is not limited to air conditioners, multi-split units, heat pumps, water heaters, and other equipment.

[0099] 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 configured as illustrative illustrations 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.

[0100] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An air conditioner indoor unit, wherein: include: chassis; a main water receiving tray, located at the bottom of the housing; a heat exchanger located in the housing and 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, and the water receiving trough body is configured to receive condensed water falling from the heat exchange main body, and an insulation layer is provided between the water receiving trough body and the heat exchange main body.

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

3. The air conditioning indoor unit according to claim 2, wherein: It also includes a heat insulation material layer, which fills the gap.

4. The air conditioning indoor unit according to claim 2 or 3, wherein: The heat insulation material layer is made of sponge.

5. The air conditioning indoor unit according to claim 2 or 3, wherein: 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 conditioning indoor unit according to any one of claims 2 to 5, wherein: The auxiliary water receiving tray further includes a water diversion trough body, which is connected to the end of the water receiving trough body. The water diversion trough body is configured to collect condensed water in the water receiving trough body to the main water receiving tray.

7. The air conditioning indoor unit according to claim 6, wherein: The water diversion trough body includes a trough body and a first connecting portion and a second connecting portion connected to the trough body, and the trough body is connected to the water receiving trough body; 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 conditioning indoor unit according to claim 7, wherein: The housing includes 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 conditioning indoor unit according to claim 7, wherein: The second connecting portion is plugged into the side plate.

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

11. The air conditioning indoor unit according to any one of claims 1 to 10, wherein: The casing includes side plates located on opposite sides of the heat exchanger along the length direction thereof, and the side plates cover edge portions of the auxiliary water receiving tray.

12. The air conditioning indoor unit according to any one of claims 1 to 11, wherein: An air duct is formed in the casing, and the heat exchanger and the main water receiving tray are both located in the air duct. A first limiting structure is provided on the casing, and a second limiting structure is provided on the main water receiving tray. The first limiting structure is engaged with the upper end of the heat exchanger, and the second limiting structure is abutted with the bottom end of the heat exchanger. The first limiting structure and the second limiting structure cooperate to fix the heat exchanger in the air duct.

13. The air conditioning indoor unit according to claim 12, wherein: The first limiting structures are provided on opposite sides of the heat exchanger along the length direction thereof.

14. The air conditioning indoor unit according to claim 12, wherein: The heat exchange main body and / or the side plate are engaged with the first limiting structure, and the heat exchange main body and / or the side plate are in abutment with the second limiting structure.

15. The air conditioning indoor unit according to claim 14, wherein: The first limiting structure has a receiving groove, and the heat exchange body and / or the side plate are clamped in the receiving groove.

16. The air conditioning indoor unit according to claim 14, wherein: The first limiting structure has a limiting hole, and the side plate is provided with a positioning piece, and the positioning piece is inserted into the limiting hole.

17. The air conditioning indoor unit according to claim 14, wherein: The second limiting structure includes a first protrusion, which extends along the length direction of the heat exchange body and abuts against the bottom end of the heat exchange body.

18. The air conditioning indoor unit according to claim 17, wherein: The distance from the first limiting structure to the first protrusion is the same as the width of the heat exchanger.

19. The air conditioning indoor unit according to claim 17, wherein: The heat exchanger is arranged obliquely above the main water receiving tray; The second limiting structure also includes a second protrusion, which is arranged on opposite sides of the first protrusion along the length direction of the heat exchanger, and the second protrusion abuts against the side of the heat exchange body and / or the side plate facing the main water receiving tray.

20. The air conditioning indoor unit according to claim 19, wherein: The housing, the first limiting structure, the first protrusion, and the second protrusion together form an installation cavity. The heat exchanger is disposed in the installation cavity, and the circumference of the heat exchanger contacts the inner wall of the installation cavity.

21. The air conditioning indoor unit according to any one of claims 1 to 20, wherein: The casing is further provided with a third limiting structure, which is located at two opposite sides of the heat exchanger along its length direction, and the third limiting structure contacts the two opposite sides of the heat exchanger along its length direction.

22. A heating and ventilation system, wherein: Comprising the air conditioner indoor unit according to any one of claims 1 to 21.

Images