Machine head assembly and heat pump water heater

Abstract

The embodiment of the utility model provides a machine head assembly and a heat pump water heater, the machine head assembly comprises a machine shell, the machine shell is provided with a containing cavity, an air inlet and an air outlet, and the air inlet and the air outlet communicate with the containing cavity; the air pipe switching structure is arranged on at least one of the air inlet and the air outlet; the air pipe adapting structure comprises an adapting base with a first air passing opening and an adapting head with a second air passing opening, the adapting base is connected with the machine shell, the adapting head is detachably arranged on the side, away from the machine shell, of the adapting base, and the second air passing opening is communicated with the first air passing opening. The production cost of the machine head assembly is low, and the universality of the adapter is high.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a head assembly and a heat pump water heater. Background Art

[0002] In the related technology, there is a heat pump water heater provided with a water tank assembly and a head assembly. The head assembly and the water tank assembly are assembled into an integrated structure. The head assembly is provided with a shell with an air inlet and an air outlet. The fan and the heat exchanger are arranged in the shell. Under the action of the fan, the external airflow enters the shell through the air inlet, exchanges heat with the heat exchanger, and then flows out from the air outlet.

[0003] When a heat pump water heater is placed in a narrow and poorly ventilated space such as an equipment room or basement, it is generally necessary to use an external air duct to meet the air inlet and outlet requirements of the heat pump water heater. However, in the related art, the production cost of the adapter used to connect the external air duct to the head assembly is high and the versatility is low. Utility Model Content

[0004] In view of this, the embodiments of the present application hope to provide a head assembly with lower production cost and higher versatility of the adapter.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a head assembly for a heat pump water heater, comprising:

[0006] A casing, the casing having a receiving cavity and an air inlet and an air outlet communicated with the receiving cavity;

[0007] An air duct adapter structure, the air duct adapter structure is arranged at at least one of the air inlet and the air outlet; the air duct adapter structure includes an adapter base having a first air outlet and an adapter having a second air outlet, the adapter base is connected to the housing, the adapter is detachably arranged on a side of the adapter base away from the housing, and the second air outlet is connected to the first air outlet;

[0008] An air duct having an air passage is connected to a side of the adapter facing away from the adapter base so that the air passage is connected to the second air outlet.

[0009] In one embodiment, the adapter base includes a base body and a mounting plate disposed on one side of the base body, the first air outlet passes through the base body and the mounting plate, and the adapter is detachably connected to the mounting plate.

[0010] In one embodiment, the cross-section of the seat body is rectangular.

[0011] In one embodiment, a side of the adapter close to the adapter base has a first flange folded in a direction away from the second air outlet, and the first flange is detachably connected to the mounting plate.

[0012] In one embodiment, a side of the adapter base close to the housing has a contact surface that contacts the outer surface of the housing, and a shape of the contact surface matches a shape of the outer surface of the housing.

[0013] In one embodiment, the housing includes a side panel and a cover plate arranged on one side of the side panel, and the side panel and the cover plate enclose the accommodating cavity;

[0014] At least one of the air inlet and the air outlet is arranged on the side panel, and the outer surface of the side panel and the contact surface of the adapter base connected to the side panel are both arc surfaces; or,

[0015] At least one of the air inlet and the air outlet is arranged on the cover plate, and the outer surface of the cover plate and the contact surface of the adapter base connected to the cover plate are both planes.

[0016] In one embodiment, a side of the adapter base close to the housing has a second flange folded in a direction away from the first air outlet, and the second flange is detachably connected to the housing.

[0017] In one embodiment, the air duct adapter structure is disposed at the air inlet, and the head assembly further includes a filter element, which is disposed at the air inlet and located in the first air outlet.

[0018] In one embodiment, the adapter base has an inspection port that is connected to the first air outlet and for the filter element to pass through, and the air duct adapter structure includes an inspection plate that covers the inspection port, and the inspection plate is detachably connected to at least one of the adapter base and the casing.

[0019] In one embodiment, one of the adapter base and the inspection plate has a limiting portion, and the other has a limiting hole, and the limiting portion and the limiting hole are plug-fitted.

[0020] In one embodiment, the adapter includes a pipe connection portion and a adapter portion located on one side of the pipe connection portion, the second air outlet passes through the pipe connection portion and the adapter portion, the adapter portion gradually expands from a side close to the pipe connection portion to a side away from the pipe connection portion, and a side of the adapter portion away from the pipe connection portion is detachably connected to the adapter base, and the air duct is connected to a side of the pipe connection portion away from the adapter portion.

[0021] In one embodiment, the cross-section of the pipe connection portion is circular, the cross-section of one end of the adapter portion close to the pipe connection portion is circular, and the cross-section of one end of the adapter portion away from the pipe connection portion is rectangular.

[0022] Yet another embodiment of the present application provides a heat pump water heater, comprising a water tank assembly and the head assembly described above, wherein the head assembly and the water tank assembly are assembled into an integral structure.

[0023] The embodiment of the present application provides a head assembly and a heat pump water heater. The head assembly is provided with a duct adapter structure having an adapter base and an adapter, so that the adapter can be connected to the casing through the adapter base. Since the adapter base only needs to meet the requirements of being able to be connected to the adapter and the casing respectively, the structure of the adapter base is relatively simple and easy to process and manufacture. The adapter does not need to be produced by separate mold opening and can be directly installed on the adapter base for use. Therefore, the head assembly of the embodiment of the present application can not only reduce production costs, but also make the adapter have better versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded diagram of a heat pump water heater provided in an embodiment of the present application;

[0025] Figure 2 for Figure 1 The structural schematic diagram of the nose assembly shown;

[0026] Figure 3 for Figure 1 A structural schematic diagram of the nose assembly from another perspective is shown;

[0027] Figure 4 for Figure 1 A partial enlarged view of the middle A;

[0028] Figure 5 for Figure 1 A structural schematic diagram of the air duct transfer structure located at the air inlet;

[0029] Figure 6 for Figure 1 A structural schematic diagram of the air duct transfer structure located at the air outlet;

[0030] Figure 7 for Figure 1 Schematic diagram of the structure of the maintenance panel shown.

[0031] Description of reference numerals:

[0032] 10. Head assembly; 11. Casing; 11a. Air inlet; 11b. Air outlet; 111. Side panel; 112. Cover plate; 12. Air duct adapter structure; 121. Adapter base; 121a. First air outlet; 121b. Contact surface; 121c. Inspection port; 1211. Base; 1212. Mounting plate; 1213. Second flange; 1214. Limiting portion; 122. Adapter; 122a. Second air outlet; 1221. First flange; 1222. Pipe connection portion; 1223. Adapter; 123. Inspection plate; 123a. Limiting hole; 13. Filter element; 20. Water tank assembly. DETAILED DESCRIPTION

[0033] In the description of the embodiments of the present application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] The present application embodiment provides a heat pump water heater. Figure 1 The heat pump water heater includes a water tank assembly 20 and a head assembly 10, and the head assembly 10 and the water tank assembly 20 are assembled into an integral structure.

[0035] The water tank assembly 20 is used to store domestic water. The head assembly 10 heats the domestic water in the water tank assembly 20 into hot water by exchanging heat with the water tank assembly 20 .

[0036] The head assembly 10 and the water tank assembly 20 are assembled into an integral structure, which means that the head assembly 10 and the water tank assembly 20 are an integral structure combined together. This type of heat pump water heater can also be called an integrated heat pump water heater.

[0037] For example, see Figure 1 , the head assembly 10 can be set on the top of the water tank assembly 20.

[0038] Please refer to 1 to Figure 4 The head assembly 10 of the embodiment of the present application includes a housing 11 and an air duct adapter structure 12.

[0039] The housing 11 has a receiving cavity and an air inlet 11 a and an air outlet 11 b communicating with the receiving cavity.

[0040] The specific structural form of the housing 11 is not limited. For example, please refer to Figure 1 and Figure 4 The housing 11 may include a side panel 111 and a cover plate 112 disposed on one side of the side panel 111, and the side panel 111 and the cover plate 112 enclose the accommodation cavity. The outer surface of the side panel 111 is generally an arc surface, and the outer surface of the cover plate 112 is generally a plane.

[0041] Figure 1 and Figure 4The air inlet 11a of the head assembly 10 shown is arranged on the cover plate 112, and the air outlet 11b is arranged on the side panel 111. In other embodiments, the air outlet 11b may be arranged on the cover plate 112, and the air inlet 11a may be arranged on the side panel 111. It is also possible that both the air inlet 11a and the air outlet 11b are arranged on the cover plate 112, or both the air inlet 11a and the air outlet 11b are arranged on the side panel 111.

[0042] The air duct adapter structure 12 is disposed at at least one of the air inlet 11a and the air outlet 11b. The air duct adapter structure 12 includes an adapter base 121 having a first air outlet 121a and an adapter 122 having a second air outlet 122a. The adapter base 121 is connected to the housing 11, and the adapter 122 is detachably disposed on a side of the adapter base 121 away from the housing 11, and the second air outlet 122a is connected to the first air outlet 121a. Specifically, a fan of the head assembly 10 and a host heat exchanger are disposed in the accommodating chamber. Under the action of the fan, the external air flow flows into the accommodating chamber from the air inlet 11a and performs heat exchange with the host heat exchanger. The air flow after heat exchange flows out from the air outlet 11b.

[0043] The air duct adapter structure 12 is used to achieve the adapter between the head assembly 10 and the air duct. It should be noted that the head assembly 10 is not limited to being used in conjunction with the air duct. Generally speaking, when the heat pump water heater is placed in a narrow and poorly ventilated space such as an equipment room and a basement, it is generally necessary to use it in conjunction with the air duct. However, when the heat pump water heater is placed in a well-ventilated space, the head assembly 10 may not be used in conjunction with the air duct.

[0044] Figures 1 to 4 The head assembly 10 shown is provided with air duct adapter structures 12 at the air inlet 11a and the air outlet 11b, respectively. The two air duct adapter structures 12 are respectively connected to the corresponding air ducts, so that one air duct is connected with the air inlet 11a through the corresponding air duct adapter structure 12, and the other air duct is connected with the air outlet 11b through the corresponding air duct adapter structure 12. The external airflow flows into the accommodating cavity through the air duct connected to the air inlet 11a, and the airflow flowing out of the air outlet 11b is discharged to the outside through the air duct connected to the air outlet 11b.

[0045] It should be noted that the head assembly 10 is not limited to providing an air duct adapter structure 12 at the air inlet 11a and the air outlet 11b respectively. According to specific setting requirements, the air duct adapter structure 12 may be provided only at the air inlet 11a, while the air duct adapter structure 12 is not provided at the air outlet 11b, which is equivalent to the air inlet 11a needing to be connected to the air duct, while the air outlet 11b does not need to be connected to the air duct. Alternatively, the air duct adapter structure 12 may be provided only at the air outlet 11b, while the air duct adapter structure 12 is not provided at the air inlet 11a, which is equivalent to the air outlet 11b needing to be connected to the air duct, while the air inlet 11a does not need to be connected to the air duct.

[0046] Please continue reading Figures 1 to 4 The adapter base 121 is used to connect the adapter 122 and the housing 11. The manufacturing method of the adapter base 121 is not limited. For example, the adapter base 121 can be a sheet metal part.

[0047] The adapter base 121 and the housing 11 may be detachably connected. For example, the adapter base 121 and the housing 11 may be fastened and connected by fasteners such as screws and bolts, or may be clamped. The adapter base 121 and the housing 11 may also be non-detachably connected. For example, the adapter base 121 and the housing 11 may be welded or integrally formed.

[0048] The purpose of the detachable connection between the adapter 122 and the adapter base 121 is to facilitate the disassembly and assembly of the adapter 122, so that the adapter 122 can be adapted to different adapter bases 121 to improve the versatility of the adapter 122. The detachable connection between the adapter base 121 and the adapter 122 is not limited. For example, the adapter base 121 and the adapter 122 can be fastened and connected by fasteners, or can be clamped.

[0049] In addition, in a scenario where the air duct is not needed, the adapter base 121 may be connected to the housing 11 without installing the adapter 122 .

[0050] The adapter 122 is used to connect to the air duct.

[0051] The structure of the adapter 122 is not limited. For example, see Figure 2 , Figure 3 , Figure 5 and Figure 6 The adapter 122 may include a pipe connection portion 1222 and an adapter portion 1223 located on one side of the pipe connection portion 1222, the second air outlet 122a passes through the pipe connection portion 1222 and the adapter portion 1223, the adapter portion 1223 gradually expands from a side close to the pipe connection portion 1222 to a side away from the pipe connection portion 1222, and the side of the adapter portion 1223 away from the pipe connection portion 1222 is detachably connected to the adapter base 121.

[0052] The pipe connection portion 1222 is used to connect the air duct. The adapter portion 1223 is used to connect the adapter base 121 and the pipe connection portion 1222 .

[0053] The adapter portion 1223 can gradually expand from a side close to the pipe connection portion 1222 to a side away from the pipe connection portion 1222. That is, the outer dimensions of the side of the adapter portion 1223 away from the pipe connection portion 1222 are larger than the outer dimensions of the side close to the pipe connection portion 1222, which can reduce the wind resistance loss in the adapter portion 1223 and improve the air volume transmission effect.

[0054] Please continue reading Figure 2 , Figure 3 , Figure 5 and Figure 6 The cross-section of the pipe connection portion 1222 may be circular, the cross-section of the adapter portion 1223 at one end close to the pipe connection portion 1222 may be circular, and the cross-section of the adapter portion 1223 at one end away from the pipe connection portion 1222 may be rectangular.

[0055] Since the cross section of the air duct is generally circular, the cross section of the pipe connection portion 1222 is circular so that it can be well connected to the air duct.

[0056] The cross section of the adapter portion 1223 at one end close to the pipe connection portion 1222 may be circular, and the cross section of the end away from the pipe connection portion 1222 may be rectangular, that is, the adapter portion 1223 is a square-circular reducer.

[0057] The first air outlet 121a of the adapter base 121 is connected to the second air outlet 122a of the adapter 122 to allow air flow to pass through. That is, for the adapter base 121 disposed at the air inlet 11a, the air flow flowing out of the corresponding air duct can flow into the air inlet 11a through the second air outlet 122a and the first air outlet 121a in sequence, and for the adapter base 121 disposed at the air outlet 11b, the air flow flows out of the air outlet 11b and flows into the corresponding air duct through the first air outlet 121a and the second air outlet 122a in sequence.

[0058] In the related art, there are certain differences in the locations of the air inlets and air outlets on different head assemblies. At the same time, the outer surface of the portion where the air inlet and / or air outlet is arranged on the housing of the head assembly may be a flat surface or a curved surface (refer to the present application Figure 1 The head assembly 10), coupled with the complex structure of the air duct adapter, therefore, the air duct adapter arranged on the curved surface and the air duct adapter arranged on the plane need to be produced separately, the air duct adapter has poor versatility and high production cost.

[0059] The head assembly 10 of the embodiment of the present application is provided with a duct adapter structure 12 having an adapter base 121 and an adapter 122, so that the adapter 122 can be connected to the housing 11 through the adapter base 121. Since the adapter base 121 only needs to meet the requirement of being able to be connected to the adapter 122 and the housing 11 respectively, the structure of the adapter base 121 is relatively simple and easy to process and manufacture. The adapter 122 does not need to be produced by a separate mold, and can be directly installed on the adapter base 121 for use. Therefore, the head assembly 10 of the embodiment of the present application can not only reduce the production cost, but also make the adapter 122 have better versatility.

[0060] In one embodiment, please refer to Figure 5 and Figure 6 The adapter base 121 may include a base body 1211 and a mounting plate 1212 disposed on one side of the base body 1211 , the first air outlet 121a passes through the base body 1211 and the mounting plate 1212 , and the adapter 122 is detachably connected to the mounting plate 1212 .

[0061] The mounting plate 1212 is used to connect the adapter 122. The mounting plate 1212 and the adapter 122 may be connected in any manner. For example, the mounting plate 1212 and the adapter 122 may be connected in a fastening connection, a clamping connection, or the like.

[0062] A mounting plate 1212 is provided on one side of the seat body 1211 , which can not only facilitate the installation of the adapter 122 , but also improve the connection stability between the mounting plate 1212 and the adapter 122 .

[0063] See also Figure 2 , Figure 3 , Figure 5 and Figure 6 A first flange 1221 folded in a direction away from the second air outlet 122 a may be provided on one side of the adapter 122 close to the adapter base 121 , and the first flange 1221 is detachably connected to the mounting plate 1212 .

[0064] The first flange 1221 is used to connect the adapter 122 and the mounting plate 1212. The first flange 1221 can be formed by folding, welding, or riveting.

[0065] The first flange 1221 is folded in a direction away from the second air outlet 122a, which can improve the connection strength between the first flange 1221 and the mounting plate 1212 and facilitate the installation and removal of the adapter 122 and the mounting plate 1212. Figure 5 and Figure 6When the cross-section of one end of the adapter portion 1223 away from the pipe connection portion 1222 is in a rectangular shape, the first flange 1221 can surround the circumference of the second air outlet 122a, and the outer dimensions of the first flange 1221 can also be rectangular, thereby not only improving the structural strength of the adapter 122, but also further improving the connection stability between the first flange 1221 and the mounting plate 1212.

[0066] Please continue reading Figure 5 and Figure 6 The cross section of the seat body 1211 may be rectangular. The seat body 1211 with a rectangular cross section can be easily processed and manufactured, especially for the transfer base 121 using sheet metal parts, the seat body 1211 and the mounting plate 1212 can be formed by bending, which has high production efficiency and low production cost.

[0067] In one embodiment, please refer to Figure 1 and Figure 6 The side of the adapter base 121 close to the housing 11 may have a contact surface 121 b that contacts the outer surface of the housing 11 , and the shape of the contact surface 121 b matches the shape of the outer surface of the housing 11 .

[0068] The shape of the contact surface 121b matches the shape of the outer surface of the housing 11, which means that the contact surface 121b fits the outer surface of the housing 11 to avoid forming a gap between the adapter base 121 and the housing 11 as much as possible, thereby causing airflow to flow out from the gap.

[0069] For example, please refer to Figure 1 and Figure 6 The housing 11 may include a side panel 111 and a cover plate 112 disposed on one side of the side panel 111. The side panel 111 and the cover plate 112 enclose a receiving cavity. At least one of the air inlet 11a and the air outlet 11b is disposed on the side panel 111. The outer surface of the side panel 111 and the contact surface 121b of the adapter base 121 connected to the side panel 111 are both arc surfaces.

[0070] That is to say, the arc surface of the contact surface 121 b fits with the arc surface of the outer surface of the side panel 111 .

[0071] See also Figure 2 , Figure 3 and Figure 5 The housing 11 includes a side panel 111 and a cover panel 112 disposed on one side of the side panel 111. The side panel 111 and the cover panel 112 enclose a receiving cavity. At least one of the air inlet 11a and the air outlet 11b is disposed on the cover panel 112. The outer surface of the cover panel 112 and the contact surface 121b of the adapter base 121 connected to the cover panel 112 are both flat surfaces.

[0072] That is to say, the plane of the contact surface 121 b is in contact with the plane of the outer surface of the cover plate 112 .

[0073] In one embodiment, please refer to Figure 2 , Figure 5 and Figure 6 A second flange 1213 folded in a direction away from the first air outlet 121 a may be provided on one side of the adapter base 121 close to the housing 11 , and the second flange 1213 is detachably connected to the housing 11 .

[0074] The second flange 1213 can be formed by folding, welding, riveting, etc.

[0075] The second flange 1213 is used to connect the adapter base 121 and the housing 11. The second flange 1213 and the housing 11 may be connected in any manner, and may be connected by fastening members, or by clamping, riveting, etc. In other embodiments, the second flange 1213 may be fixedly connected to the housing 11.

[0076] The second flange 1213 is folded in a direction away from the first air outlet 121 a , so as to facilitate the connection between the adapter base 121 and the housing 11 .

[0077] In one embodiment, please refer to Figure 1 , Figures 3 to 5 The head assembly 10 further includes a filter 13, which is disposed at the air inlet 11a. For the head assembly 10 having an air duct adapter structure 12 disposed at the air inlet 11a, the filter 13 may be disposed in the first air outlet 121a.

[0078] The filter element 13 is used to filter debris and dust in the external airflow to prevent the debris and dust in the airflow from entering the accommodating cavity through the air inlet 11a.

[0079] The filter element 13 may be a filter screen, which may be made of polyester fiber or glass fiber to filter tiny particles in the air, such as dust, pollen, bacteria, etc.

[0080] The filter element 13 may be disposed at the air inlet 11a in any manner. For example, see Figure 4 A clamping portion may be provided on one side of the housing 11 close to the air duct transfer structure 12, and the filter element 13 is clamped at the air inlet 11a to prevent the filter element 13 from being displaced and affecting the filtering effect.

[0081] See also Figures 1 to 3 , Figure 5The adapter base 121 can be provided with an inspection port 121c which is connected to the first air outlet 121a and for the filter element 13 to pass through. The air duct adapter structure 12 includes an inspection plate 123 which blocks the inspection port 121c. The inspection plate 123 is detachably connected to at least one of the adapter base 121 and the casing 11. That is, the inspection plate 123 can be detachably connected to the casing 11, or to the adapter base 121, or to both the casing 11 and the adapter base 121.

[0082] The inspection port 121c is used for inspecting the filter element 13. Since the filter element 13 needs to be cleaned or replaced regularly to ensure its filtering effect, the inspection port 121c is provided to facilitate the disassembly and assembly of the filter element 13.

[0083] The inspection plate 123 is used to shield the inspection opening 121c to prevent the airflow in the first air outlet 121a from flowing out from the inspection opening 121c and affecting the air volume entering the accommodating chamber.

[0084] The access panel 123 may be connected to the adapter base 121 and / or the housing 11 in any manner, for example, the access panel 123 may be connected by fastening members or by snap-fitting.

[0085] See also Figure 3 , Figure 5 and Figure 7 The adapter base 121 may also be provided with a limiting portion 1214, and the inspection plate 123 may be provided with a limiting hole 123a. The limiting portion 1214 and the limiting hole 123a may be plugged in and matched with each other to position the inspection plate 123, so that the inspection plate 123 may be detachably connected to the adapter base 121 and / or the housing 11.

[0086] In some other embodiments, the inspection plate 123 may be provided with a limiting portion 1214 , and the adapter base 121 may be provided with a limiting hole 123 a .

[0087] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0088] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A head assembly for a heat pump water heater, characterized in that: include: A casing, the casing having a receiving cavity and an air inlet and an air outlet communicated with the receiving cavity; An air duct switching structure, wherein the air duct switching structure is arranged at at least one of the air inlet and the air outlet; The air duct adapter structure includes an adapter base having a first air outlet and an adapter joint having a second air outlet, the adapter base is connected to the casing, the adapter joint is detachably arranged on a side of the adapter base away from the casing, and the second air outlet is connected to the first air outlet.

2. The head assembly according to claim 1, characterized in that: The adapter base includes a base body and a mounting plate arranged on one side of the base body, the first air outlet passes through the base body and the mounting plate, and the adapter is detachably connected to the mounting plate.

3. The head assembly according to claim 2, characterized in that: The cross section of the seat body is in the shape of a rectangle.

4. The head assembly according to claim 2 or 3, characterized in that: A side of the adapter close to the adapter base has a first flange folded in a direction away from the second air outlet, and the first flange is detachably connected to the mounting plate.

5. The head assembly according to any one of claims 1 to 3, characterized in that: The side of the adapter base close to the housing has a contact surface that contacts the outer surface of the housing, and the shape of the contact surface matches the shape of the outer surface of the housing.

6. The head assembly according to claim 5, characterized in that: The housing comprises a side panel and a cover plate arranged on one side of the side panel, wherein the side panel and the cover plate enclose the accommodating cavity; At least one of the air inlet and the air outlet is arranged on the side panel, and the outer surface of the side panel and the contact surface of the adapter base connected to the side panel are both arc surfaces; or, At least one of the air inlet and the air outlet is arranged on the cover plate, and the outer surface of the cover plate and the contact surface of the adapter base connected to the cover plate are both planes.

7. The head assembly according to any one of claims 1 to 3, characterized in that: A side of the adapter base close to the housing has a second flange folded in a direction away from the first air outlet, and the second flange is detachably connected to the housing.

8. The head assembly according to any one of claims 1 to 3, characterized in that: The air duct adapter structure is arranged at the air inlet, and the head assembly further comprises a filter element, which is arranged at the air inlet and located in the first air outlet.

9. The head assembly according to claim 8, characterized in that: The adapter base has an inspection port that is connected to the first air outlet and allows the filter to pass through. The air duct adapter structure includes an inspection plate that blocks the inspection port. The inspection plate is detachably connected to at least one of the adapter base and the casing.

10. The head assembly according to claim 9, characterized in that: One of the adapter base and the inspection plate has a limiting portion, and the other has a limiting hole, and the limiting portion and the limiting hole are plug-fitted.

11. The head assembly according to any one of claims 1 to 3, characterized in that: The adapter includes a pipe connection portion and an adapter portion located on one side of the pipe connection portion, the second air outlet passes through the pipe connection portion and the adapter portion, the adapter portion gradually expands from a side close to the pipe connection portion to a side away from the pipe connection portion, and the side of the adapter portion away from the pipe connection portion is detachably connected to the adapter base.

12. The head assembly according to claim 11, characterized in that: The cross section of the pipe connection portion is circular, the cross section of one end of the adapter portion close to the pipe connection portion is circular, and the cross section of one end of the adapter portion away from the pipe connection portion is rectangular.

13. A heat pump water heater, characterized in that: It comprises a water tank assembly and the head assembly described in any one of claims 1 to 12, wherein the head assembly and the water tank assembly are assembled into an integral structure.

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