Heat pump water heater

Abstract

A heat pump water heater (100) comprises a water tank assembly (1), a heat pump device (2) and a sealing piece (50). The water tank assembly (1) comprises a first shell (11), a water tank body (12), a condenser and a mounting plate (13). The heat pump device (2) comprises a compressor (22), an evaporator (23), a throttling assembly (24) and a base (28), the compressor (22), the condenser, the throttling assembly (24) and the evaporator (23) are sequentially connected to form a refrigerant circulation loop, and when a refrigerant flows in the refrigerant circulation loop, the condenser exchanges heat with the water tank body (12) so as to heat water in the water tank body (12). And the mounting plate (13) comprises a mounting plate body (132) and a second drainage part (137). The base (28) comprises a base body (280) and a first drainage part (281). Wherein the first drainage part (281) and the second drainage part (137) are opposite and communicated in the axial direction of the heat pump water heater (100). And the sealing piece (50) is arranged between the first drainage part (281) and the second drainage part (137) so as to seal a gap between the first drainage part (281) and the second drainage part (137).

Description

heat pump water heater

[0001] This application claims priority to Chinese patent application No. 202320973066.3 filed on April 26, 2023, priority to Chinese patent application No. 202223072717.6 filed on November 18, 2022, priority to Chinese patent application No. 202222650045.6 filed on September 30, 2022, and priority to Chinese patent application No. 202222650002.8 filed on September 30, 2022, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of household appliances, and in particular to a heat pump water heater. Background Art

[0003] The heat pump water heater can introduce cold water into the water tank from the water inlet, and heat the cold water into hot water through the heat pump device, and then let the hot water flow out through the water outlet for users to use.

[0004] Summary of the Invention

[0005] A heat pump water heater is provided, comprising a water tank assembly and a heat pump device. The water tank assembly comprises a first shell, a water tank body, and a condenser. The first shell has a drain outlet. The water tank body is disposed within the first shell and is configured to store water. The condenser is disposed within the first shell. The heat pump device is disposed on top of the water tank assembly and comprises a second shell, an evaporator, a compressor, and a throttling assembly. The compressor and evaporator are disposed within the second shell. The throttling assembly is disposed between the evaporator and the condenser. The compressor, condenser, throttling assembly, and evaporator are sequentially connected to form a refrigerant circulation loop. When refrigerant flows in the refrigerant circulation loop, the condenser exchanges heat with the water tank body to heat the water within the water tank body. The water tank assembly further comprises a mounting plate disposed at one end of the first shell near the heat pump device and configured to support the heat pump device. The heat pump device also includes a base, which is arranged at an end of the mounting plate away from the water tank body, and the compressor, the evaporator, and the throttling assembly are respectively arranged on the base. The mounting plate includes a mounting plate body and a second drain portion, the second drain portion is connected to the mounting plate body, and the second drain portion is connected to the drain port to drain condensed water. The base includes a base body and a first drain portion, one end of the first drain portion is connected to the base body, and the other end of the first drain portion is opposite to and connected to the second drain portion in the axial direction of the heat pump water heater. The heat pump water heater also includes a seal, which is arranged between the first drain portion and the second drain portion to seal the gap between the first drain portion and the second drain portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG1 is a structural diagram of a heat pump water heater according to some embodiments;

[0007] FIG2 is a cross-sectional view of a heat pump water heater according to some embodiments;

[0008] FIG3 is a partial cross-sectional view of a heat pump water heater according to some embodiments;

[0009] FIG4 is a partial structural diagram of a heat pump device and a water tank assembly according to some embodiments;

[0010] FIG5 is a structural diagram of the heat pump water heater in FIG4 from another angle;

[0011] FIG6 is a structural diagram of a first sub-housing of a heat pump water heater according to some embodiments;

[0012] FIG7 is a partial enlarged view of the circle A1 in FIG6;

[0013] FIG8 is a partial enlarged view of the area circled at B in FIG6 ;

[0014] FIG9 is a structural diagram of a second sub-housing of a heat pump water heater according to some embodiments;

[0015] FIG10 is a partial enlarged view of circle C1 in FIG9 ;

[0016] FIG11 is a partial enlarged view of circle D in FIG9 ;

[0017] FIG12 is a structural diagram of a mounting plate of a heat pump water heater according to some embodiments;

[0018] 13 is another structural diagram of a first sub-housing of a heat pump water heater according to some embodiments;

[0019] FIG14 is a partial enlarged view of circle A2 in FIG13;

[0020] FIG15 is another structural diagram of a second sub-housing of a heat pump water heater according to some embodiments;

[0021] FIG16 is a partial enlarged view of circle C2 in FIG15;

[0022] 17 is a cross-sectional view of a housing and a top cover of a heat pump water heater according to some embodiments;

[0023] FIG18 is a partial enlarged view of circle E in FIG17 ;

[0024] FIG19 is a partial enlarged view of circle F in FIG17 ;

[0025] FIG20 is an exploded view of a heat pump water heater according to some embodiments;

[0026] FIG21 is a structural diagram of a fan assembly and an evaporator according to some embodiments;

[0027] FIG22 is a top view of a heat pump water heater according to some embodiments;

[0028] FIG23 is a partial structural diagram of a heat pump device according to some embodiments;

[0029] 24 is another side view of a blower assembly and evaporator according to some embodiments;

[0030] FIG25 is a structural diagram of a filter assembly according to some embodiments;

[0031] FIG26 is a structural diagram of a filter assembly and a second housing according to some embodiments;

[0032] FIG27 is a structural diagram of a heat pump water heater according to some embodiments;

[0033] FIG28 is another structural diagram of a heat pump device according to some embodiments;

[0034] FIG29 is another structural diagram of a heat pump device according to some embodiments;

[0035] FIG30 is a structural diagram of a water tank assembly according to some embodiments;

[0036] FIG31 is a cross-sectional view of the heat pump device shown in FIG29;

[0037] FIG32 is a partial enlarged view of circle G in FIG31;

[0038] FIG33 is a partial enlarged view of circle H in FIG32;

[0039] FIG34 is a top view of a seal according to some embodiments;

[0040] FIG35 is a cross-sectional view of a seal according to some embodiments;

[0041] FIG36 is a structural diagram of a seal according to some embodiments;

[0042] FIG37 is a structural diagram of a base according to some embodiments;

[0043] FIG38 is a top view of a base according to some embodiments;

[0044] FIG39 is a cross-sectional view taken along line II in FIG38;

[0045] FIG40 is a structural diagram of a mounting plate according to some embodiments;

[0046] FIG41 is a top view of a mounting plate according to some embodiments;

[0047] FIG42 is a cross-sectional view of FIG41 taken along line JJ;

[0048] FIG43 is a top view of a base and water tank assembly according to some embodiments;

[0049] FIG44 is a cross-sectional view of FIG43 along line KK. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0051] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0052] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0053] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0054] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0055] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0056] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0057] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0058] Heat pump water heaters are a new type of water heater, following the emergence of electric, gas, and solar water heaters. They absorb heat from the air to heat the water in the tank. This avoids the problems of electric water heaters with electrical leakage and dry-burning, as well as the potential for gas poisoning during use. They also overcome the weather-related shortcomings of solar water heaters. They offer advantages such as high energy efficiency, safety, environmental protection, 24 / 7 operation, and ease of use.

[0059] As shown in Figures 1 and 2, the heat pump water heater 100 includes a water tank assembly 1 and a heat pump device 2. The water tank assembly 1 includes a first shell 11, a water tank body 12 and a condenser. The water tank body 12 is disposed in the first shell 11 and is configured to store water. The water tank body 12 has a water inlet 121 and a water outlet 122. For example, the water inlet 121 and the water outlet 122 can be disposed at both ends of the axial direction of the water tank body 12. The water inlet 121 is configured to connect to an external pipe so that cold water can flow into the water tank body 12 through the water inlet 121. After the cold water is heated, it can flow out of the water tank body 12 through the water outlet 122 for use by the user.

[0060] In some embodiments, the condenser is disposed in the first housing 11 , and the condenser can be a heat-conducting member with a hollow tubular structure. For example, the condenser is a copper tube and is wound around the outside of the water tank body 12 .

[0061] As shown in Figures 1 to 4, the heat pump device 2 is located on top of the water tank assembly 1. The heat pump device 2 includes a second housing 21, a compressor 22 and an evaporator 23 housed within the second housing 21. The evaporator 23 is configured to absorb heat from the air. The compressor 22 has an air inlet and an air outlet. The air outlet of the compressor 22 is connected to one end of the condenser, and the air inlet of the compressor 22 is connected to one end of the evaporator 23.

[0062] In some embodiments, the heat pump device 2 further includes a throttle assembly 24. The throttle assembly 24 is connected between the other end of the evaporator 23 and the other end of the condenser. The compressor 22, condenser, throttle assembly 24, and evaporator 23 are sequentially connected to form a refrigerant circulation loop. Refrigerant can flow in this refrigerant circulation loop, thereby enabling heat exchange between the condenser and the water tank body 12, thereby heating the water in the water tank body 12.

[0063] In some embodiments, the heat pump device 2 further includes a fan assembly 25. The fan assembly 25 is disposed on one side of the evaporator 23 and is configured to draw external air into the interior of the second housing 21, and to direct air within the interior of the second housing 21 into the evaporator 23 for heat exchange with the evaporator 23. After absorbing heat, the refrigerant within the evaporator 23 returns to the compressor 22 for further compression. This cycle repeats, continuously transferring heat energy from the air to the water, thereby raising the water temperature within the water tank body 12.

[0064] In some embodiments, the heat pump device 2 further includes an electrical control box 26. The electrical control box 26 is coupled to the compressor 22, the evaporator 23, and the fan assembly 25 to control the normal operation of the heat pump water heater 100. The electrical control box 26 and the compressor 22 are located on the same side of the evaporator 23, opposite the fan assembly 25. The electrical control box 26 is configured to control the normal operation of the heat pump water heater 100. As shown in FIG4 , the fan assembly 25 and the compressor 22 are respectively located on either side of the thickness direction of the evaporator 23 (the left-right direction as shown in FIG2 ).

[0065] When heat pump water heater 100 is in operation, fan assembly 25 operates. Under the action of fan assembly 25, a large amount of air flows over the outer surface of evaporator 23. The heat in the air is absorbed by evaporator 23, and the air temperature is reduced, turning into cold air. The cold air is then discharged from fan assembly 25.

[0066] During this process, the refrigerant in the evaporator 23 absorbs heat, vaporizes, and is then drawn into the compressor 22. The compressor 22 compresses the returning low-pressure refrigerant gas into a high-temperature, high-pressure gas, which is then fed into the condenser wrapped around the outer wall of the water tank body 12. The heat generated by the high-temperature, high-pressure gas is transferred to the interior of the water tank body 12 by heat conduction through the condenser, heating the water therein.

[0067] The refrigerant in the condenser is cooled by the continued pressure and becomes a liquid. This liquid is then throttled and cooled by a throttling assembly 24 (e.g., an expansion valve) before flowing back into the evaporator 23. Because the pressure in the evaporator 23 drops suddenly, the liquid refrigerant rapidly evaporates into a gaseous state there, absorbing a large amount of heat. This cycle repeats, continuously transferring heat energy from the air into the water, raising the temperature of the water in the water tank 12.

[0068] Typically, during the operation of the evaporator 23, condensed water may form on the surface of the evaporator 23 and on the surface of the volute 251 near the evaporator 23. This condensed water can flow from the heat pump device 2 into the water tank assembly 1 below and then out through the drain port on the first housing 11. During this process, if the seal between the heat pump device 2 and the water tank assembly 1 is poor, condensed water can easily leak from the mating point of the heat pump device 2 and the water tank assembly 1, affecting the normal operation of the heat pump water heater 100.

[0069] To address the above-mentioned issues, some embodiments of the present disclosure provide a heat pump water heater 100, which further includes a seal disposed between the heat pump device 2 and the water tank assembly 1 to seal the gap between the heat pump device 2 and the water tank assembly 1. This prevents condensed water from leaking from the mating point between the heat pump device 2 and the water tank assembly 1, thereby improving the sealing effect of the heat pump water heater 100.

[0070] In some embodiments, as shown in Figures 2 and 30 , the water tank assembly 1 further includes a mounting plate 13. Mounting plate 13 is disposed at one axial end of the first housing 11. For example, mounting plate 13 is disposed at the top of the first housing 11 to facilitate installation of the heat pump device 2. A first accommodating chamber 10 is defined between mounting plate 13 and the first housing 11, and the water tank body 12 is located within the first accommodating chamber 10.

[0071] In some embodiments, as shown in Figures 2 to 5, the lower end of the second housing 21 is detachably connected to the mounting plate 13. The second housing 21 and the mounting plate 13 form a second accommodating chamber 20 (i.e., an accommodating chamber), and the compressor 22, evaporator 23, throttling assembly 24, fan assembly 25, and electrical control box 26 are all located in the second accommodating chamber 20.

[0072] As shown in FIG1 , the heat pump water heater 100 further includes a display device 27 (eg, a display panel), which is disposed on the second housing 21 . The display device 27 is configured to display the water temperature in the water tank body 12 .

[0073] In some embodiments, one of the second housing 21 and the mounting plate 13 is provided with a receiving portion 131, and the other of the second housing 21 and the mounting plate 13 is provided with a snap-fit ​​portion 215. The snap-fit ​​portion 215 snaps into the receiving portion 131 to connect the second housing 21 and the mounting plate 13. For example, the second housing 21 includes the snap-fit ​​portion 215, which may be a boss. The mounting plate 13 includes the receiving portion 131, which may be a groove.

[0074] Thus, when mounting the display device 27 on the second housing 21, the second housing 21 can be pre-mounted on the mounting plate 13 by engaging the engaging portion 215 with the accommodating portion 131, and then the display device 27 can be wired. This prevents the second housing 21 from falling off the mounting plate 13 during wiring. Furthermore, this assembly method is simple and easy to operate, thereby improving assembly efficiency.

[0075] As shown in Figure 12, the accommodating portion 131 is provided on the outer periphery of the mounting plate 13. The accommodating portion 131 is formed by a portion of the mounting plate 13 being recessed toward the central axis of the mounting plate 13. As shown in Figures 6 and 9, the engaging portion 215 is provided on the inner wall of the second housing 21, located on the side of the second housing 21 adjacent to the mounting plate 13. During assembly, the engaging portion 215 engages the accommodating portion 131, allowing the second housing 21 to be pre-installed on the mounting plate 13.

[0076] In some embodiments, one end of the engaging portion 215 extends toward the central axis of the second housing 21, and the other end of the engaging portion 215 is connected to the second housing 21. The width of the one end of the engaging portion 215 is smaller than the width of the other end so as to cooperate with the corresponding accommodating portion 131.

[0077] In some embodiments, as shown in Figures 2 and 12, the mounting plate 13 includes a mounting plate body 132 and a mating portion 133 that are connected to each other. The mounting plate body 132 is connected to the first housing 11, and the mating portion 133 is provided on the circumference of the mounting plate body 132 and extends toward the top of the second housing 21. The mating portion 133 is formed with an accommodating portion 131.

[0078] As shown in Figures 3, 12 and 20, the shape of the mounting plate body 132 is adapted to the shape of the top of the first shell 11 to separate the heat pump device 2 from the water tank body 12, thereby preventing water in the water tank body 12 from entering the second shell 21 and causing a short circuit in the circuit of the heat pump device 2.

[0079] The mating portion 133 is located at the edge of the mounting plate body 132 and extends toward a side away from the water tank assembly 1. For example, the mating portion 133 extends along the circumference of the mounting plate body 132 and is perpendicular to the mounting plate body 132. Furthermore, the mating portion 133 is spaced apart from the outer circumference of the mounting plate body 132 so that after the second housing 21 and the mounting plate 13 are assembled, the mating portion 133 can be located within the second housing 21, with the lower end surface of the second housing 21 abutting against the outer circumference of the mounting plate body 132.

[0080] As a result, the structure of the mounting plate 13 is simple and easy to process, and the sealing performance of the connection between the second shell 21 and the mounting plate 13 can be improved, preventing external liquid from entering the interior of the second shell 21 from the connection, thereby playing a waterproof role for the compressor 22 and the like.

[0081] As shown in Figures 6 to 9, the second housing 21 includes a first sub-housing 211 and a second sub-housing 212 that are detachably connected. The engaging portion 215 includes a first sub-engaging portion 2111 and a second sub-engaging portion 2121. The first sub-housing 211 is provided with a plurality of first sub-engaging portions 2111, which are arranged at intervals along the circumference of the first sub-housing 211. The second sub-housing 212 is provided with a plurality of second sub-engaging portions 2121, which are arranged at intervals along the circumference of the second sub-housing 212.

[0082] The plurality of accommodating portions 131 include a plurality of first sub-accommodating portions 1311 and a plurality of second sub-accommodating portions 1312. During installation, the first sub-engaging portions 2111 are respectively located within the first sub-accommodating portions 1311 to pre-install the first sub-housing 211 on the mounting plate 13. The second sub-engaging portions 2121 are respectively located within the second sub-accommodating portions 1312 to pre-install the second sub-housing 212 on the mounting plate 13.

[0083] In some embodiments, the display device 27 is disposed in one of the first sub-housing 211 and the second sub-housing 212. As shown in Figures 6 and 17, the display device 27 is disposed in the first sub-housing 211. In this case, when installing the display device 27 on the first sub-housing 211, the first sub-housing 211 can be pre-installed on the mounting plate 13 by engaging the first sub-engaging portion 2111 with the first sub-accommodating portion 1311. Wiring of the display device 27 can then be performed, thereby preventing the first sub-housing 211 from falling off the mounting plate 13 during wiring. Finally, the second sub-housing 212 is connected to the first sub-housing 211, providing sufficient space for wiring operations.

[0084] In some embodiments, at least two of the plurality of first sub-engaging portions 2111 located at both ends of the circumference of the first sub-housing 211 have first guide surfaces. At least two of the plurality of second sub-engaging portions 2121 located at both ends of the circumference of the second sub-housing 212 have second guide surfaces.

[0085] For example, the at least two first sub-engaging portions 2111 include two first sub-engaging portions 2111, and the first guide surfaces of the two first sub-engaging portions 2111 are arranged opposite to each other. The at least two second sub-engaging portions 2121 include two second sub-engaging portions 2121, and the second guide surfaces of the two second sub-engaging portions 2121 are arranged opposite to each other.

[0086] It is understood that at least two of the plurality of first sub-accommodating portions 1311 have a third guide surface that contacts the first guide surface, and at least two of the plurality of second sub-accommodating portions 1312 have a fourth guide surface that contacts the second guide surface.

[0087] During installation, the first guide surface cooperates with the third guide surface to quickly install the first sub-housing 211 on the mounting plate 13. The second guide surface cooperates with the fourth guide surface to quickly install the second sub-housing 212 on the mounting plate 13. This helps improve the assembly efficiency between the housing and the mounting plate 13.

[0088] In some embodiments, along the radial direction of the mounting plate 13, the plurality of second sub-engaging portions 2121 on the second sub-housing 212 are respectively located at both ends of the circumferential direction of the second sub-housing 212. This arrangement ensures that there is sufficient space in the middle of the second sub-housing 212, making it easier to install the larger fan assembly 25 on the side of the second accommodating cavity 20 adjacent to the second sub-housing 212, thereby fully utilizing the space within the second housing 21, making the arrangement of the heat pump device 2 compact, and reducing the overall volume of the heat pump device 2.

[0089] In some embodiments, the second housing 21 further includes at least one third sealing rib 216. The third sealing rib 216 is disposed on the inner sidewall of the second housing 21 and is located on the side of the second housing 21 adjacent to the mounting plate 13. For example, the third sealing rib 216 is located between two adjacent engaging portions 215 of the plurality of engaging portions 215. During assembly, the third sealing rib 216 abuts against the outer circumferential surface of the mating portion 133.

[0090] Thus, the sealing between the mounting plate 13 and the second shell 21 can be further improved, preventing external impurities or liquids from entering the second shell 21 , thereby ensuring the cleanliness of the interior of the second shell 21 .

[0091] In some embodiments, as shown in FIG18 , at least one first limiting portion 136 is provided on the outer circumference of the mating portion 133. Specifically, the first limiting portion 136 is provided on a side of the mating portion 133 adjacent to the second housing 21. The third sealing rib 216 abuts against the first limiting portion 136, and the first limiting portion 136 can be supported on the corresponding third sealing rib 216.

[0092] In some embodiments, the at least one third sealing rib 216 includes a plurality of third sealing ribs 216, and the plurality of third sealing ribs 216 are arranged at intervals along the circumference of the inner sidewall of the second shell 21. The at least one first limiting portion 136 includes a plurality of first limiting portions 136, and the plurality of first limiting portions 136 are arranged at intervals along the circumference of the mounting plate 13.

[0093] In this way, the cooperation between the first limiting portion 136 and the third sealing rib 216 can prevent the second housing 21 and the mounting plate 13 from moving relative to each other in the vertical direction, and prevent the mounting plate 13 from being disengaged from the second housing 21. In addition, it can further play a waterproof role.

[0094] In some embodiments, a latch 2113 is provided on one of the first sub-housing 211 and the second sub-housing 212, and a second stopper 134 is provided on the mounting plate 13. The latch 2113 abuts against the second stopper 134. As shown in Figures 6 and 8, two latches 2113 are provided on one end of the inner wall of the first sub-housing 211, adjacent to the mounting plate 13. The two latches 2113 are located at opposite ends of the circumference of the first sub-housing 211, and are located on the side of the first sub-engaging portion 2111 away from the third sealing rib 216.

[0095] As shown in Figure 12, two second stoppers 134 are provided on one side of the mating portion 133, adjacent to the center of the mounting plate body 132. These second stoppers 134 may face each other radially relative to the mounting plate body 132. During installation, the first and second sub-engaging portions 2111, 2121 respectively engage within their corresponding receiving portions 131, with the latches 2113 abutting against the sidewalls of the second stoppers 134. This prevents the second housing 21 from rotating about the central axis of the mounting plate 13, thereby securely fixing the second housing 21 to the mounting plate 13.

[0096] As shown in Figures 6 to 8, first sub-housing 211 further includes a first mounting post 2115. As shown in Figures 9 to 11, second sub-housing 212 further includes a second mounting post 2125, which is disposed corresponding to first mounting post 2115. The ends of the fastener are connected to first mounting post 2115 and second mounting post 2125, respectively.

[0097] During installation, after the first sub-housing 211 and the second sub-housing 212 are connected, the ends of the fastener extend into the first mounting post 2115 and the second mounting post 2125, respectively. This improves the connection reliability between the first sub-housing 211 and the second sub-housing 212 and prevents the first sub-housing 211 and the second sub-housing 212 from becoming disengaged.

[0098] In some embodiments, the first sub-shell 211 is provided with at least one first connecting portion 213, and the second sub-shell 212 is provided with at least one second connecting portion 214, and the second connecting portion 214 cooperates with the first connecting portion 213 to improve the waterproof performance of the connection between the first sub-shell 211 and the second sub-shell 212.

[0099] For example, one of the first connection portion 213 and the second connection portion 214 has a protrusion, and the other of the first connection portion 213 and the second connection portion 214 has a groove.

[0100] The following describes the structures of the second connection portion 214 and the first connection portion 213 by taking the example that the first connection portion 213 has a groove and the second connection portion 214 has a protrusion.

[0101] As shown in Figures 13 to 16, the first connecting portion 213 is provided at the edge of the first sub-housing 211 and extends axially along the first sub-housing 211. The second connecting portion 214 is provided at the edge of the second sub-housing 212 and extends axially along the second sub-housing 212. During installation, the second connecting portion 214 fits within the first connecting portion 213 so that the end surface of the first sub-housing 211 and the end surface of the second sub-housing 212 are aligned, reducing the gap at the connection between the first sub-housing 211 and the second sub-housing 212, thereby improving the sealing performance of the connection between the first sub-housing 211 and the second sub-housing 212.

[0102] In this way, external liquid (such as water) is prevented from entering the second housing 21 through the above-mentioned connection, and waterproof protection is achieved for the compressor 22, fan assembly 25 and evaporator 23 in the second housing 21, thereby enhancing the waterproof effect of the heat pump water heater 100. In addition, a smooth connection between the first sub-housing 211 and the second sub-housing 212 can be ensured, so that the appearance of the first sub-housing 211 and the second sub-housing 212 is well assembled.

[0103] As shown in Figure 14, the first connecting portion 213 includes a first section 2131 and a second section 2132. The first section 2131 extends axially along the first housing 11. One end of the second section 2132 is connected to the first section 2131, and the other end of the second section 2132 extends toward the center of the first housing 11.

[0104] As shown in Figure 16, the second connecting portion 214 includes a fourth section 2141 and a fifth section 2142. The fourth section 2141 extends axially along the first housing 11 and fits within the first section 2131. One end of the fifth section 2142 is connected to the fourth section 2141, and the other end of the fifth section 2142 extends toward the center of the first housing 11 and fits within the second section 2132.

[0105] In some embodiments, the second segment 2132 extends horizontally away from the first segment 2131, and the first connecting portion 213 forms a first bend. The fifth segment 2142 extends horizontally away from the fourth segment 2141, and the second connecting portion 214 forms a second bend.

[0106] Therefore, when the second connection part 214 is embedded in the first connection part 213, the first connection part 213 and the second connection part 214 can further achieve sealing of the first sub-shell 211 and the second sub-shell 212, making it difficult for external liquid to penetrate into the second shell 21, thereby enhancing the waterproof effect of the heat pump water heater 100.

[0107] 17 and 19 , in some embodiments, the second housing 21 further comprises a top cover 3, which is disposed on a side (e.g., the upper side) of the first sub-housing 211 and the second sub-housing 212 away from the water tank assembly 1. The top cover 3 comprises a top cover extension 31 and a top cover body 32 connected to each other. The top cover body 32 is opposite to the top of the second housing 21. The top cover extension 31 extends downwardly and obliquely away from the top cover body 32, and the end surface of the free end of the top cover extension 31 (i.e., the bottom wall of the top cover 3) abuts against the outer side wall of the second section 2132.

[0108] Thus, the top cover 3 covers the upper part of the fitting point of the first connecting part 213 and the second connecting part 214, which can protect the first sub-shell 211 and the second sub-shell 212, so that the upper part of the fitting point of the first connecting part 213 and the second connecting part 214 has double waterproof performance, which is beneficial to enhancing the waterproof effect of the heat pump water heater 100.

[0109] In some embodiments, as shown in Figures 14 and 16, the first connecting portion 213 further includes a third segment 2133. One end of the third segment 2133 is connected to the other end of the second segment 2132, and the other end of the third segment 2133 extends obliquely away from the second segment 2132. The second connecting portion 214 further includes a sixth segment 2143. One end of the sixth segment 2143 is connected to the other end of the fifth segment 2142, and the other end of the sixth segment 2143 extends obliquely away from the end of the second connecting portion 214. The sixth segment 2143 fits within the third segment 2133.

[0110] In some embodiments, the third section 2133 extends upward at an angle away from the second section 2132. The length of the third section 2133 can be less than the distance from the top cover body 32 to the second section 2132. Similarly, the sixth section 2143 extends upward at an angle away from the fifth section 2142. In this case, the ends of the first and second connecting portions 213 and 214 adjacent to the top cover 3 have multiple bends. This further enhances the sealing between the first and second sub-housings 211 and 212, and enhances the waterproof performance of the second housing 21.

[0111] It will be appreciated that the mounting plate 13 is positioned between the first housing 11 and the second housing 21. In some embodiments, the sidewalls of the mounting plate 13 extend into the second housing 21. As shown in Figures 17 and 18, the mating portion 133 of the mounting plate 13 extends upward to form the sidewalls, and the diameter of the sidewalls is smaller than that of the second housing 21. During installation, the second housing 21 is positioned outside the sidewalls of the mounting plate 13, providing dual waterproofing between the lower portions of the first connecting portion 213 and the second connecting portion 214, thereby enhancing the waterproofing of the heat pump water heater 100.

[0112] In some embodiments, referring to FIG. 18 , along the axial direction of the first shell 11, the free end of the side wall of the mounting plate 13 (i.e., the top of the mating portion 133) is higher than the free end of the first segment 2131 (i.e., the bottom of the first segment 2131). For example, at the connection between the first sub-shell 211 and the second sub-shell 212, the end surface of the free end of the side wall of the mounting plate 13 is located above the free end of the first segment 2131. At this time, the free end of the side wall of the mounting plate 13 partially overlaps with the free end of the first segment 2131 in the axial direction of the second shell 21. Even if external liquid penetrates into the second shell 21 from the lower part of the mating point between the first connecting portion 213 and the second connecting portion 214, the side wall of the mounting plate 13 can prevent the external liquid from further penetrating into the second shell 21, thereby further enhancing the waterproof effect of the heat pump water heater 100.

[0113] In some embodiments, there are two first connection parts 213 and two second connection parts 214. The two first connection parts 213 are respectively located at two ends of the circumference of the first sub-housing 211, and the two second connection parts 214 are respectively located at two ends of the circumference of the second sub-housing 212. The two first connection parts 213 cooperate with the two second connection parts 214 to further ensure the waterproof effect of the connection between the first sub-housing 211 and the second sub-housing 212.

[0114] In some embodiments, as shown in FIG. 2 and FIG. 20 , the top cover 3 has a first air inlet 301 and a first air outlet 302 , and both the first air inlet 301 and the first air outlet 302 are in communication with the second accommodating cavity 20 .

[0115] In some embodiments, as shown in Figures 2 to 4, the first air inlet 301 and the first air outlet 302 are respectively located on both sides of the evaporator 23, and the first air outlet 302 and the fan assembly 25 are located on the same side of the evaporator 23 and are connected to the fan assembly 25. The air entering the interior of the second shell 21 from the first air inlet 301 is suitable for flowing through the evaporator 23 and exchanging heat with the evaporator 23, and then discharged from the first air outlet 302 through the fan assembly 25.

[0116] In some embodiments, the first air inlet 301 and the first air outlet 302 are arranged non-centrally symmetrically with respect to the top cover 3. That is, the first air inlet 301 and the first air outlet 302 are not radially opposed to each other in the top cover 3. This prevents interference with the first air inlet 301 by components such as the electronic control box 26, increasing air intake space and efficiency. Furthermore, air entering the interior of the second housing 21 through the first air inlet 301 must pass through a predetermined angle as it passes through the evaporator 23 before exiting through the first air outlet 302. This extends the air flow path from the first air inlet 301 to the first air outlet 302, ensuring sufficient heat exchange between the air and the compressor 22, the electronic control box 26, the evaporator 23, and the like.

[0117] As shown in Figure 22, the angle γ between the lines connecting the center of the first air inlet 301 and the center of the first air outlet 302, respectively, and the center of the top cover 3 satisfies the following condition: 80° ≤ γ < 180°. That is, the center of the first air inlet 301 and the center of the top cover 3 form a first line segment, and the center of the first air outlet 302 and the center of the top cover 3 form a second line segment. The angle formed by the orthographic projections of the first and second line segments on the top cover 3 along the axial direction of the second housing 21 is γ.

[0118] It is understood that the smaller the angle γ, the closer the first air inlet 301 and the first air outlet 302 are. If the angle γ is less than 80°, the first air inlet 301 and the first air outlet 302 may easily interfere with each other, affecting the air intake and air outlet performance of the heat pump water heater 100. This may also reduce the angle between the lines connecting the first air inlet 301 and the first air outlet 302 to the second air inlet 2511, increasing the resistance to air flow within the second housing 21. Furthermore, it is inconvenient to install components such as the electrical control box 26 and the compressor 22 within the second housing 21.

[0119] Air entering the second housing 21 through the first air inlet 301 passes through the evaporator 23, then through the second air inlet 2511 and the second air outlet 2512, ultimately flowing out of the first air outlet 302. Therefore, with the center position of the second air inlet 2511 fixed, a larger angle γ shortens the air's path within the second housing 21, reducing the heat dissipation effect on the compressor 22 and the electrical control box 26 within the second housing 21. Furthermore, the air's residence time within the second housing 21 decreases, reducing the evaporation efficiency of the evaporator 23.

[0120] If the angle γ is equal to 180°, the first air inlet 301 and the first air outlet 302 are symmetrically arranged about the center of the second housing 21. In this case, the first air inlet 301 may be partially located above the electrical control box 26, resulting in a small air intake space. The air entering the second housing 21 through the first air inlet 301 is disturbed by the electrical control box 26 and cannot smoothly reach the location of the evaporator 23, resulting in air loss.

[0121] For example, the angle γ between the lines connecting the center of the first air inlet 301 and the center of the first air outlet 302 and the center of the top cover 3 is 105°.

[0122] Thus, by limiting the angle γ between the first air inlet 301 and the first air outlet 302, on the one hand, the air intake effect of the first air inlet 301 can be guaranteed, thereby ensuring the air volume required for the operation of the evaporator 23 and improving the heat exchange efficiency of the evaporator 23. On the other hand, the air outlet effect of the first air outlet 302 can be guaranteed, which is conducive to increasing the flow rate of air inside the second housing 21, allowing the air to quickly carry away the heat generated by the operation of the electrical control box 26 and the compressor 22, thereby effectively reducing the energy consumption of the heat pump water heater 100.

[0123] In some embodiments, as shown in Figures 20 and 22, the first air inlet 301 and the compressor 22 are arranged opposite each other along the axial direction of the second housing 21, and the first air inlet 301 and the compressor 22 are spaced apart. In other words, the first air inlet 301 and the compressor 22 are opposite each other along the axial direction of the second housing 21. Air entering the second housing 21 from the first air inlet 301 first passes through the compressor 22 before flowing to the evaporator 23 and the electrical control box 26. This prevents the electrical control box 26 from blocking the first air inlet 301, increases the air flow into the second housing 21, and reduces the temperature of the compressor 22.

[0124] As shown in Figures 20, 21, and 29, the fan assembly 25 includes a volute 251, a volute extension 252, and a wind wheel 255. The volute 251 is located on a side of the evaporator 23 away from the compressor 22. The volute 251 has a second air inlet 2511 and a second air outlet 2512. The second air inlet 2511 faces the evaporator 23. The second air outlet 2512 is opposite to and connected to the first air outlet 302 along the axial direction of the second housing 21. Air entering the interior of the second housing 21 from the first air inlet 301 is adapted to flow through the second air inlet 2511 and into the fan assembly 25, and then be discharged from the second air outlet 2512 and the first air outlet 302.

[0125] In some embodiments, as shown in Figures 21 and 22, one end of the volute extension 252 is connected to the second air outlet 2512, and the other end of the volute extension 252 is opposite to the first air outlet 302. From the second air outlet 2512 toward the first air outlet 302 (i.e., the up and down direction), the volute extension 252 is tilted toward the direction close to the evaporator 23.

[0126] In some embodiments, the wind wheel 255 is arranged in the volute 251. The air entering the interior of the second shell 21 from the first air inlet 301 flows through the evaporator 23 and exchanges heat with the evaporator 23, then enters the volute 251 through the second air inlet 2511, and is discharged from the first air outlet 302 through the second air outlet 2512.

[0127] In some embodiments, the volute extension 252 is tilted toward the side where the evaporator 23 is located. This allows the volute extension 252 to create a clearance space on the other side away from the evaporator 23, facilitating the installation of the second housing 21. Furthermore, some of the space around the evaporator 23 can be utilized to make the internal structure of the heat pump device 2 more compact and facilitate the connection between the second air outlet 2512 and the first air outlet 302, thereby increasing the air volume at the first air outlet 302.

[0128] In some embodiments, as shown in Figures 22 to 24 , the second air inlet 2511 is located on a side of the evaporator 23 near the electrical control box 26 in the width direction of the evaporator 23. Thus, the second air inlet 2511 and the electrical control box 26 are located on opposite sides of the evaporator 23. Air entering the second housing 21 from the first air inlet 301 first passes through the compressor 22, then through the electrical control box 26 and the evaporator 23, and ultimately flows into the second air inlet 2511.

[0129] This ensures that, under the action of the fan assembly 25, the air inside the second housing 21 flows from the side of the evaporator 23 near the electrical control box 26 (such as the S2 side in Figure 23) to the second air inlet 2511, preventing air from flowing from the side of the evaporator 23 near the compressor 22 (such as the S1 side in Figure 23) to the second air inlet 2511. This increases the area of ​​the evaporator 23 through which air flows, increasing the wind-receiving area of ​​the evaporator 23. It also ensures that the air is in full contact with the electrical control box 26, achieving heat dissipation from the electrical control box 26 and thus ensuring the operating efficiency of the electrical control box 26.

[0130] 24 , the center of the second air inlet 2511 is located on a side of the first center plane adjacent to the mounting plate 13. The first center plane is the center plane in the height direction of the evaporator 23, and the first center plane extends along the central axis of the evaporator 23.

[0131] It should be noted that the height direction of the evaporator 23 is the up-down direction shown in FIG. 24 , and the width direction of the evaporator 23 is the left-right direction shown in FIG. 24 .

[0132] Therefore, setting the center of the second air inlet 2511 below the first center plane of the evaporator 23 and close to the electrical control box 26 can extend the flow path of air from the first air inlet 301 to the first air outlet 302, fully increase the wind receiving area of ​​the evaporator 23, and thereby increase the heat exchange efficiency of the evaporator 23.

[0133] As shown in Figure 23, the distance between the electrical control box 26 and the evaporator 23 gradually increases toward the compressor 22, forming an angle θ between the electrical control box 26 and the evaporator 23, where θ satisfies the following: 15 ≤ θ ≤ 30°. The first air inlet 301 faces the compressor 22. After air enters the second housing 21 through the first air inlet 301, it flows toward the evaporator 23 and the space between the evaporator 23 and the electrical control box 26, facilitating heat dissipation from the electrical control box 26.

[0134] It is understood that the smaller the angle θ, the smaller the airflow between the electrical control box 26 and the evaporator 23, which may reduce the heat dissipation capacity of the electrical control box 26 and weaken the heat exchange capacity of the evaporator 23. The larger the angle θ between the electrical control box 26 and the evaporator 23, the more air flowing to the evaporator 23 will be blocked by the electrical control box 26, and turbulence will be more likely to occur on the surface of the electrical control box 26, causing air loss, reducing the airflow into the evaporator 23, and further affecting the heat exchange efficiency of the evaporator 23.

[0135] For example, the distance between the electrical control box 26 and the evaporator 23 gradually increases toward the compressor 22, and the angle θ between the electrical control box 26 and the evaporator 23 is 25°. Therefore, limiting the angle θ between the electrical control box 26 and the evaporator 23 can increase the airflow into the evaporator 23 on the side closest to the electrical control box 26, thereby improving the heat exchange capacity and efficiency of the evaporator 23. Furthermore, a large amount of air can pass through the surface of the electrical control box 26, thereby improving the cooling effect on the electrical control board within the electrical control box 26 and facilitating heat dissipation from the electrical control box 26.

[0136] As shown in Figures 20 and 21, the volute 251 includes a third shell 2513 and a fourth shell 2514 that are interconnected along the central axis of the wind wheel 255. The evaporator 23 includes a pipeline for evaporation and a side plate for mounting the pipeline. The third shell 2513 is connected to the side plate of the evaporator 23, and the third shell 2513 and the side plate are integrally formed. The fourth shell 2514 is connected to the side of the third shell 2513 away from the evaporator 23. As a result, the third shell 2513 and the side plate of the evaporator 23 are integrally formed, which can reduce the number of components of the heat pump device 2, which is conducive to improving the installation efficiency of the volute 251, and improves the sealing between the volute 251 and the evaporator 23, which is conducive to increasing the air intake of the second air inlet 2511.

[0137] As shown in Figures 25 and 26 , the heat pump water heater 100 further includes a filter assembly 4. The filter assembly 4 is disposed within the second housing 21 and faces the first air inlet 301. The filter assembly 4 satisfies one of the following conditions: the filter assembly 4 is detachably connected to the second housing 21, or the filter assembly 4 includes a filter 41 and a bracket 42, wherein the filter 41 is detachably mounted on the bracket 42, and the bracket 42 is connected to the second housing 21.

[0138] If the filter assembly 4 is detachably connected to the second housing 21, a mounting groove can be formed on the sidewall of the second housing 21 to facilitate installation and removal of the filter assembly 4, improving installation efficiency. The entire filter assembly 4 can be assembled into the second housing 21 along the mounting groove. When the filter assembly 4 needs to be replaced, the entire filter assembly 4 is removed along the mounting groove. This allows the filter assembly 4 and the second housing 21 to be manufactured separately, reducing processing complexity.

[0139] When the filter assembly 4 includes a filter 41 and a bracket 42, the filter 41 is detachably mounted on the bracket 42. The bracket 42 can be integrally formed with the second housing 21 to enhance the structural strength of the bracket 42. When the filter 41 needs to be replaced, the filter 41 is removed from the bracket 42 to facilitate replacement of the filter 41, thereby reducing subsequent use and maintenance costs.

[0140] In some embodiments, as shown in FIG20 , the heat pump device 2 further includes a base 28, which is disposed on a side of the mounting plate 13 away from the water tank assembly 1. The compressor 22, evaporator 23, throttle assembly 24, fan assembly 25, and electrical control box 26 are each disposed on a side (e.g., the upper side) of the base 28 away from the water tank assembly 1. The base 28 is connected to the water tank assembly 1 to complete the assembly of the heat pump device 2 and the water tank assembly 1.

[0141] As shown in Figures 31, 32 and 39, the base 28 includes a base body 280 and a first drain portion 281. One end of the first drain portion 281 is connected to the base body 280. Condensed water generated by the heat pump device 2 can be drained from the first drain portion 281.

[0142] In some embodiments, as shown in Figures 32, 41, and 42, the mounting plate 13 further includes a second drain portion 137, which is connected to the mounting plate body 132. The other end of the first drain portion 281 is relatively connected to the second drain portion 137 in the axial direction of the heat pump water heater 100 (the vertical direction as shown in Figure 31). In this way, during the operation of the evaporator 23, condensed water generated on the surfaces of the evaporator 23, the fan assembly 25, and other components can be collected by the base body 280 and discharged from the second drain portion 137.

[0143] As shown in Figures 27, 43, and 44, the water tank assembly 1 further includes a drain pipe 111 and a drain port 112. The drain port 112 is provided on one side of the first housing 11. The first drain portion 281, the second drain portion 137, the drain pipe 111, and the drain port 112 are sequentially connected to form a drainage channel. Condensed water generated by the heat pump water heater 100 can be discharged from the drain port 112 through the drainage channel.

[0144] In some embodiments, the heat pump water heater 100 further includes a seal 50 disposed between the first drain portion 281 and the second drain portion 137 to seal the gap between the first drain portion 281 and the second drain portion 137. This prevents condensed water from leaking from the gap between the first drain portion 281 and the second drain portion 137, thereby improving the sealing effect of the heat pump water heater 100. Furthermore, the seal 50 has a simple structure and is easy to assemble, thereby improving the production and assembly efficiency of the heat pump water heater 100.

[0145] In some embodiments, as shown in Figures 31 and 32 , the cross-sectional area of ​​the first drain portion 281 decreases in the direction of water flow (i.e., the direction of condensed water flow). That is, the cross-sectional area of ​​the first drain portion 281 decreases in the vertical direction as shown in Figure 31 . The top end of the first drain portion 281 is connected to the base body 280 to receive condensed water. The bottom end of the first drain portion 281 is connected to the second drain portion 137 to drain the condensed water.

[0146] This arrangement allows the top opening of the first drain portion 281 to have a larger area than the bottom opening, facilitating sufficient collection of condensed water within the first drain portion 281. Furthermore, because the cross-sectional area of ​​the first drain portion 281 along the water flow direction tends to decrease, the condensed water on the downstream side of the first drain portion 281 can be subjected to a greater vertical force component while maintaining the condensed water flow rate. This increases the condensed water flow rate, allowing it to flow smoothly through the bottom of the first drain portion 281, the seal 50, and the second drain portion 137, and be discharged from the heat pump device 2.

[0147] In some embodiments, as shown in Figures 32 and 44, the second drain portion 137 further includes a first connection portion 1371 and a second connection portion 1372. One end of the second connection portion 1372 is connected to the first drain portion 281, and the other end of the second connection portion 1372 is connected to the drain port 112 via the drain pipe 111. The second connection portion 1372 extends axially along the heat pump water heater 100 and has a drain hole 1373. In this way, condensed water flowing out of the first drain portion 281 can flow into the drain pipe 111 through the drain hole 1373 and be discharged from the drain port 112.

[0148] In some embodiments, the first connection portion 1371 is disposed on a side of the second connection portion 1372 near the first drainage portion 281 and extends circumferentially around the second connection portion 1372. One end of the first connection portion 1371 extends toward the base body 280 and is connected to the mounting plate body 132, while the other end of the first connection portion 1371 communicates with the second connection portion 1372. The cross-sectional area of ​​the first connection portion 1371 decreases from one end to the other end (i.e., the direction of water flow) to mate with the first drainage portion 281.

[0149] 32 , the seal 50 includes a seal body 51 disposed between the first drainage portion 281 and the first connecting portion 1371. The seal body 51 has a decreasing cross-sectional area in the direction of water flow to seal the gap between the first drainage portion 281 and the first connecting portion 1371.

[0150] In some embodiments, as shown in Figures 32 to 36, the seal 50 further includes a first ring portion 52 and a second ring portion 53. The first ring portion 52 is connected to one end (such as the top end) of the seal body 51 close to the base body 280, and extends in a direction away from the central axis of the seal body 51. The outer periphery of the one end of the first drain portion 281 is supported on the outer periphery of the one end of the first connection portion 1371 through the first ring portion 52. That is, the top outer periphery of the first drain portion 281 is supported on the top outer periphery of the first connection portion 1371 through the first ring portion 52. The first ring portion 52 is configured to seal the gap between the top outer periphery of the first drain portion 281 and the top outer periphery of the first connection portion 1371.

[0151] The second ring portion 53 is connected to one end (e.g., the bottom end) of the seal body 51 near the second connection portion 1372 and extends in a direction close to the central axis of the seal body 51. The other end of the first drain portion 281 is supported by the second ring portion 53 on the inner periphery of the other end of the first connection portion 1371. In other words, the bottom end of the first drain portion 281 is supported by the second ring portion 53 on the inner periphery of the bottom end of the first connection portion 1371. The second ring portion 53 is configured to seal the gap between the bottom end of the first drain portion 281 and the inner periphery of the bottom end of the first connection portion 1371.

[0152] 32 , the side away from the central axis of the second connection portion 1372 is the outer side, and the end closer to the central axis of the second connection portion 1372 is the inner side. The inner periphery of the bottom end of the first connection portion 1371 is the outer periphery of the top end of the second connection portion 1372.

[0153] Some embodiments of the present disclosure are provided with a first ring portion 52 and a second ring portion 53 according to the shape contours of the first drainage portion 281 and the first connecting portion 1371, so that the sealing member 50 can be tightly filled in the gap between the first drainage portion 281 and the first connecting portion 1371, thereby further improving the waterproof performance of the fitting point between the first drainage portion 281 and the second drainage portion 137.

[0154] As shown in Figure 33, the base 28 also includes a first sealing rib 282, which is disposed on the outer periphery of the top end of the first drain portion 281. The first sealing rib 282 mates with the first ring portion 52 along the outer periphery of the top end of the first drain portion 281. The first sealing rib 282 can circumferentially limit the displacement of the first ring portion 52, thereby improving the stability of the seal 50. For example, the first sealing rib 282 and the first ring portion 52 form an interference fit.

[0155] As shown in Figure 33, the mounting plate 13 also includes a second sealing rib 138, which is disposed on the inner circumference of the bottom end of the first connecting portion 1371. The second sealing rib 138 mates with the second ring portion 53 along the inner circumference of the bottom end of the first connecting portion 1371. The second sealing rib 138 can circumferentially limit the displacement of the second ring portion 53, thereby improving the stability of the seal 50. For example, the second sealing rib 138 and the second ring portion 53 form an interference fit.

[0156] In some embodiments, as shown in Figures 28 and 38, the base 28 further includes a first water receiving trough 283. The first water receiving trough 283 is disposed opposite the evaporator 23. For example, the first water receiving trough 283 is disposed below the evaporator 23. Furthermore, the first water receiving trough 283 is connected to the first drainage portion 281. When the evaporator 23 absorbs heat from the outside air, the water vapor in the outside air liquefies into condensed water after approaching the evaporator 23. The condensed water flows along the evaporator 23 into the first water receiving trough 283 and, under the guidance of the first water receiving trough 283, flows into the first drainage portion 281 and then flows out of the first drainage portion 281. This improves the drainage efficiency of the condensed water generated on the surface of the evaporator 23.

[0157] As shown in Figures 28, 29 and 38, the base 28 also includes a second water receiving trough 284 and a water guide trough 286. The second water receiving trough 284 is arranged opposite to the fan assembly 25. For example, the second water receiving trough 284 is arranged below the fan assembly 25. The second water receiving trough 284 is connected to the first drainage portion 281 through the water guide trough 286. Since the fan assembly 25 is adjacent to the evaporator 23, condensed water will also be generated on the surface of the fan assembly 25 during the operation of the evaporator 23. The condensed water on the surface of the fan assembly 25 flows along the volute 251 into the second water receiving trough 284, and is guided by the second water receiving trough 284 into the first drainage portion 281, and then flows out from the first drainage portion 281. This can improve the discharge efficiency of the condensed water on the surface of the fan assembly 25.

[0158] As shown in Figures 28 and 38, the base 28 further includes a drainage groove 285, one end of which is connected to the first water receiving groove 283, and the other end of which is connected to the first drainage portion 281. This allows condensed water on the surface of the evaporator 23 to flow into the first water receiving groove 283, while condensed water on the surface of the volute 251 flows into the second water receiving groove 284. The condensed water in the first and second water receiving grooves 283 and 284 then converges and is then directed into the first drainage portion 281 through the drainage groove 285, thereby improving the efficiency of condensed water discharge.

[0159] In some embodiments, the width of the orthographic projection of the drain groove 285 on the base 28 decreases in the direction from one end of the drain groove 285 toward the other end. Thus, the width of the orthographic projection of the first water receiving trough 283 on the base 28 is large, which facilitates the collection of condensed water. As the condensed water flows, the width of the orthographic projection of the drain groove 285 on the base 28 decreases, which helps increase the external force exerted on the condensed water at the other end of the drain groove 285 and improves the flow rate of the condensed water. Furthermore, the other end is connected to the inlet of the first drain portion 281, which facilitates the sufficient discharge of the condensed water.

[0160] In some embodiments, the height of the drain groove 285 in the axial direction of the heat pump water heater 100 decreases from one end to the other end. That is, the drain groove 285 is inclined toward the water tank body 12 from one end to the other end. The height of the first drain portion 281 is lower than that of the first and second water receiving grooves 283, 284. This facilitates the convergence of condensed water within the first and second water receiving grooves 283, 284 along the drain groove 285 to the first drain portion 281, thereby converging and draining condensed water from various locations on the base 28.

[0161] In some embodiments, the seal 50 is an integrally molded rubber seal. For example, the seal 50 is formed using a one-piece molding process. Compared to separate assembly methods, this arrangement allows for faster molding, greater overall stability, improved plasticity, and easier assembly of the seal 50. Furthermore, the seal 50 is made of rubber, which has excellent elasticity, wear resistance, and water resistance, thereby enhancing the seal's waterproofness and ease of installation.

[0162] In some embodiments, as shown in FIG37 , the base 28 is provided with a plurality of first guides 287. As shown in FIG40 , the mounting plate 13 is provided with a plurality of second guides 139. The plurality of first guides 287 cooperate with the plurality of second guides 139. This arrangement facilitates the assembly and positioning of the base 28 and the mounting plate 13, thereby improving the ease and accuracy of assembly of the base 28 and the mounting plate 13.

[0163] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A heat pump water heater, comprising: A water tank assembly, comprising: a first shell having a drain port; a water tank body disposed in the first housing, the water tank body being configured to store water; and a condenser disposed in the first shell; and A heat pump device is provided on top of the water tank assembly, and comprises: a second shell; a compressor, disposed in the second housing; an evaporator disposed in the second shell; and a throttling assembly disposed between the evaporator and the condenser, wherein the compressor, the condenser, the throttling assembly, and the evaporator are sequentially connected to form a refrigerant circulation loop, wherein when the refrigerant flows in the refrigerant circulation loop, the condenser exchanges heat with the water tank body to heat the water in the water tank body; The water tank assembly further includes a mounting plate, the mounting plate being disposed at one end of the first housing close to the heat pump device and configured to support the heat pump device; The heat pump device further includes a base, which is arranged on a side of the mounting plate away from the water tank body, and the compressor, the evaporator and the throttling assembly are respectively arranged on the base; wherein, The mounting plate includes a mounting plate body and a second drain portion, the second drain portion is connected to the mounting plate body, and the second drain portion is communicated with the drain port to drain condensed water; The base includes a base body and a first drain portion, one end of the first drain portion is connected to the base body, and the other end of the first drain portion is opposite to and connected to the second drain portion in the axial direction of the heat pump water heater; The heat pump water heater further includes a sealing member disposed between the first drain portion and the second drain portion to seal a gap between the first drain portion and the second drain portion.

2. The heat pump water heater according to claim 1, wherein: In the flow direction of the condensed water, the cross-sectional area of ​​the first drainage portion tends to decrease; The second drainage portion includes: a second connection portion, one end of the second connection portion being in communication with the first drainage portion, and the other end of the second connection portion being in communication with the drainage port; and a first connecting portion located on a side of the second connecting portion close to the base body; one end of the first connecting portion extends toward the base body, and the other end of the first connecting portion is connected to the second connecting portion; a cross-sectional area of ​​the first connecting portion decreases in a direction from the one end to the other end to cooperate with the first drain portion; The seal includes a seal body, which is arranged between the first drain portion and the first connecting portion; in the flow direction of the condensed water, the cross-sectional area of ​​the seal body tends to decrease to seal the gap between the first drain portion and the first connecting portion.

3. The heat pump water heater according to claim 2, wherein: The seal also includes: a first ring portion connected to one end of the seal body close to the base body and extending in a direction away from the central axis of the seal body; an outer periphery of the one end of the first drainage portion is supported by the outer periphery of the one end of the first connecting portion through the first ring portion; and A second ring portion, the second ring portion is connected to one end of the sealing body close to the second connecting portion and extends in a direction close to the central axis of the sealing body; the other end of the first drainage portion is supported on the inner periphery of the other end of the first connecting portion through the second ring portion.

4. The heat pump water heater according to claim 3, wherein: The base further includes a first sealing rib, which is disposed on the outer periphery of the one end of the first drainage portion, and the first sealing rib cooperates with the first ring portion.

5. The heat pump water heater according to claim 3 or 4, wherein: The mounting plate further includes a second sealing rib, which is disposed on the inner periphery of the other end of the first connecting portion, and the second sealing rib cooperates with the second ring portion.

6. The heat pump water heater according to any one of claims 1 to 5, wherein: The base further includes a first water receiving trough, which is arranged opposite to the evaporator and is communicated with the first drainage portion.

7. The heat pump water heater according to claim 6, further comprising a fan assembly, wherein the fan assembly is disposed on one side of the evaporator and is configured to allow external air to enter the evaporator to exchange heat with the evaporator; The base further includes a second water receiving trough, which is arranged opposite to the fan assembly and is communicated with the first drainage portion.

8. The heat pump water heater according to claim 6 or 7, wherein: The base also includes a drainage groove, one end of which is connected to the first water receiving groove, and the other end of which is connected to the first drainage part; wherein, in the direction from the one end to the other end, the width of the positive projection of the drainage groove on the base body tends to decrease.

9. The heat pump water heater according to any one of claims 1 to 8, wherein: The sealing member is a one-piece member; The base further includes a first guide portion, and the mounting plate further includes a second guide portion. The first guide portion cooperates with the second guide portion to connect the base and the mounting plate.

10. The heat pump water heater according to any one of claims 1 to 9, further comprising: an electric control box, wherein the electric control box and the compressor are located on the one side of the evaporator, and the electric control box is coupled to the compressor; as well as a fan assembly, the fan assembly being located on a side of the evaporator opposite to the one side; The second shell includes a top cover, the top cover is formed with a first air inlet and a first air outlet, the first air inlet is located on the one side of the evaporator and is arranged opposite to the compressor; the first air outlet is located on the other side of the evaporator and is connected to the fan assembly; the air flow is suitable for entering the heat pump device through the first air inlet and exchanging heat with the evaporator, and then being discharged from the first air outlet through the fan assembly; wherein, The first air inlet and the first air outlet are arranged non-centrally symmetrically with respect to the center of the top cover.

11. The heat pump water heater according to claim 10, wherein: An angle γ is formed between a first line connecting the center of the first air inlet and the center of the top cover and a second line connecting the center of the first air outlet and the center of the top cover, wherein γ satisfies: 80°≤γ<180°.

12. The heat pump water heater according to claim 10 or 11, wherein: The fan assembly includes a second air inlet and a second air outlet, the second air inlet is arranged toward the evaporator; the second air outlet and the first air outlet are opposite and connected along the axial direction of the second shell; wherein, in the width direction of the evaporator, the center of the second air inlet is located on the side of the evaporator close to the electrical control box; in the height direction of the evaporator, the center of the second air inlet is located on the side of the evaporator close to the water tank body.

13. The heat pump water heater according to any one of claims 10 to 12, wherein: In a direction toward the compressor, the distance between the electric control box and the evaporator increases, and an angle θ is formed between the electric control box and the evaporator, and the angle θ satisfies: 15°≤θ≤30°.

14. The heat pump water heater according to any one of claims 1 to 13, further comprising a filter assembly, wherein the filter assembly is disposed in the second housing and opposite to the first air inlet; The filter assembly satisfies one of the following conditions: The filter assembly is detachably connected to the second housing; or The filter assembly comprises a filter and a bracket, and the filter is detachably arranged on the bracket.

15. The heat pump water heater according to any one of claims 1 to 14, wherein: The second shell is detachably connected to the mounting plate; a receiving cavity is formed between the mounting plate and the second shell; the compressor, the fan assembly, the throttling assembly and the evaporator are respectively received in the receiving cavity; wherein, One of the second shell and the mounting plate is provided with at least one accommodating portion, and the other of the second shell and the mounting plate is provided with at least one engaging portion, which is engaged in the accommodating portion to connect the second shell and the mounting plate.

16. The heat pump water heater according to claim 15, wherein: The locking portion is arranged on the inner wall surface of the second shell; the mounting plate body is connected to the first shell; the mounting plate also includes a matching portion, which is connected to the mounting plate body; the matching portion is arranged in the circumference of the mounting plate body and extends in the direction toward the second shell; the matching portion is located in the second shell, and the accommodating portion is arranged on the matching portion.

17. The heat pump water heater according to claim 15 or 16, wherein: The second shell further comprises a first sub-shell and a second sub-shell that are detachably connected, and the top cover is provided on the first sub-shell and the second sub-shell; the at least one engaging portion comprises a plurality of engaging portions, and the plurality of engaging portions comprises at least one first sub-engaging portion and at least one second sub-engaging portion; wherein, The at least one first sub-clamping portion includes a plurality of first sub-clamping portions, and the plurality of first sub-clamping portions are arranged at intervals along the circumference of the first sub-shell; the at least one second sub-clamping portion includes a plurality of second sub-clamping portions, and the plurality of second sub-clamping portions are arranged at intervals along the circumference of the second sub-shell.

18. The heat pump water heater according to claim 17, wherein: The first sub-clamping portions located on both sides of the first sub-shell among the plurality of first sub-clamping portions have first guide surfaces; the second sub-clamping portions located on both sides of the second sub-shell among the plurality of second sub-clamping portions have second guide surfaces; The at least one accommodating portion includes a plurality of accommodating portions, and the plurality of accommodating portions include a plurality of first accommodating portions and a plurality of second accommodating portions; at least two of the plurality of first accommodating portions have a third guide surface, and the third guide surface is in contact with the first guide surface; and at least two of the plurality of second accommodating portions have a fourth guide surface, and the fourth guide surface is in contact with the second guide surface.

19. The heat pump water heater according to claim 17 or 18, wherein: The plurality of second sub-engaging portions are respectively arranged close to the ends of the second sub-shell.

20. The heat pump water heater according to any one of claims 17 to 19, wherein: The second shell further includes at least one third sealing rib, which is located on a side of the second shell adjacent to the mounting plate and abuts against the mating portion; wherein the third sealing rib is provided between two adjacent snap-fitting portions among the plurality of snap-fitting portions.

21. The heat pump water heater according to claim 20, wherein: At least one first limiting portion is provided on the outer periphery of the matching portion, and the third sealing rib abuts against the first limiting portion.

22. The heat pump water heater according to any one of claims 17 to 21, wherein: One of the first sub-housing and the second sub-housing is provided with a buckle, the mounting plate includes a second limiting portion, and the buckle abuts against the second limiting portion.

23. The heat pump water heater according to any one of claims 17 to 22, wherein: The first sub-housing is provided with at least one second connecting portion, and the second sub-housing is provided with at least one second connecting portion. The first connecting portion cooperates with the second connecting portion to seal the connection between the first sub-housing and the second sub-housing.

24. The heat pump water heater according to claim 23, wherein: The first connecting portion includes: a first section extending along the axial direction of the first shell; a second section, one end of the second section being connected to the first section, and the other end of the second section extending in a direction toward the center of the first shell; The second connecting portion includes: a fourth section, the fourth section extending along the axial direction of the first shell and fitted into the first section; A fifth section, one end of which is connected to the fourth section, and the other end of which extends in a direction toward the center of the first shell; and the fifth section is fitted in the second section.

25. The heat pump water heater according to claim 24, wherein: The second shell further includes a top cover, which is arranged on the top of the first sub-shell and the second sub-shell, and the bottom wall of the top cover abuts against the outer side wall of the second section.

26. The heat pump water heater according to claim 24 or 25, wherein: The first connecting portion further includes a third section, one end of the third section is connected to the other end of the second section, and the other end of the third section extends obliquely in a direction away from the second section; The second connecting portion further includes a sixth segment, one end of which is connected to the other end of the fifth segment, and the other end of the sixth segment extends obliquely in a direction away from the fifth segment; the sixth segment is fitted within the third segment.

27. The heat pump water heater according to any one of claims 24 to 26, wherein: The matching portion is located in the second shell; along the axial direction of the first shell, the top end of the matching portion is higher than the bottom end of the first section.

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