Heat pump water heater

Abstract

A heat pump water heater, comprising a water tank assembly and a heat pump device. The water tank assembly comprises a first housing, a water tank body, and a condenser. The water tank body and the condenser are disposed in the first housing, and the condenser is configured to release heat to heat water in a water tank. The heat pump device comprises a compressor, an evaporator, a fan assembly, an electric control box, a throttling assembly, and a base. The throttling assembly is disposed between the evaporator and the condenser, and the compressor, the condenser, the throttling assembly, and the evaporator are connected in sequence to form a refrigerant circulation loop. The base is disposed at the top of the water tank assembly, and the base comprises a base body and a plurality of hoisting structures. The compressor, the heat exchanger, the fan assembly, and the electric control box are all disposed on the base body. The plurality of hoisting structures are arranged at intervals in the circumferential direction of the base body.

Description

heat pump water heater

[0001] This application claims priority to Chinese patent application No. 202223072734.X filed on November 18, 2022, 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, priority to Chinese patent application No. 202222650002.8 filed on September 30, 2022, and priority to Chinese patent application No. 202222649824.4 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 includes a water tank assembly and a heat pump device. The water tank assembly includes a first shell, a water tank body, and a condenser. The water tank body is disposed within the first shell and has a water inlet and a water outlet. The condenser is disposed within the first shell and is configured to release heat to heat the water within the water tank body. The heat pump device is located on top of the water tank assembly and includes a compressor, an evaporator, a fan assembly, a throttling assembly, and an electrical control box. The compressor has an air inlet and an exhaust port, the exhaust port being connected to the condenser. The evaporator is connected to the air inlet and is configured to absorb heat from the air. The fan assembly is located on one side of the evaporator and is configured to direct external air into the evaporator. The throttling assembly is disposed between the evaporator and the condenser. The compressor, the condenser, the throttling assembly, and the evaporator are sequentially connected to form a refrigerant circulation circuit. An electrical control box, the electrical control box and the compressor are located on the other side of the evaporator opposite to the one side, and the electrical control box is coupled to the compressor, the fan assembly and the throttling assembly; wherein, the heat pump device also includes a base, the base is arranged on the top of the water tank assembly, the compressor, the evaporator, the fan assembly, the electrical control box and the throttling assembly are respectively arranged on the side of the base away from the water tank body; the base includes a base body and a plurality of lifting structures, the plurality of lifting structures are arranged at intervals along the circumference of the base body, so that the base can be installed on the top of the water tank assembly through the lifting structure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0007] FIG2 is an exploded view of a partial structure of a heat pump water heater according to some embodiments;

[0008] FIG3 is a structural diagram of a heat pump device and a water tank assembly according to some embodiments;

[0009] FIG4 is a partial enlarged view of the circle P in FIG3 ;

[0010] 5A is a partial cross-sectional view of a heat pump device and a water tank assembly according to some embodiments;

[0011] FIG5B is a partial enlarged view of the circle Q in FIG5A ;

[0012] FIG6 is a top view of a heat pump device and a water tank assembly according to some embodiments;

[0013] FIG7A is a partial structural diagram of a heat pump device according to some embodiments;

[0014] FIG7B is a structural diagram of a base according to some embodiments;

[0015] FIG8 is a cross-sectional view of a heat pump water heater according to some embodiments;

[0016] FIG9 is a partial cross-sectional view of a heat pump water heater according to some embodiments;

[0017] FIG10 is a structural diagram of the heat pump water heater in FIG3 from another angle;

[0018] FIG11 is a structural diagram of a first sub-housing of a heat pump water heater according to some embodiments;

[0019] FIG12 is a partial enlarged view of the circle A1 in FIG11;

[0020] FIG13 is a partial enlarged view of the area circled B in FIG11 ;

[0021] FIG14 is a structural diagram of a second sub-housing of a heat pump water heater according to some embodiments;

[0022] FIG15 is a partial enlarged view of circle C1 in FIG14;

[0023] FIG16 is a partial enlarged view of circle D in FIG14;

[0024] FIG17 is a structural diagram of a mounting plate of a heat pump water heater according to some embodiments;

[0025] FIG18 is another structural diagram of a first sub-housing of a heat pump water heater according to some embodiments;

[0026] FIG19 is a partial enlarged view of the circle A2 in FIG18;

[0027] FIG20 is another structural diagram of a second sub-housing of a heat pump water heater according to some embodiments;

[0028] FIG21 is a partial enlarged view of circle C2 in FIG20;

[0029] FIG22 is a cross-sectional view of a housing and a top cover of a heat pump water heater according to some embodiments;

[0030] FIG23 is a partial enlarged view of circle E in FIG22;

[0031] FIG24 is a partial enlarged view of circle F in FIG22 ;

[0032] FIG25 is an exploded view of a heat pump water heater according to some embodiments;

[0033] FIG26 is a structural diagram of a fan assembly and an evaporator according to some embodiments;

[0034] FIG27 is a partial enlarged view of circle G in FIG26;

[0035] FIG28 is a front view of a fan assembly and an evaporator according to some embodiments;

[0036] FIG29 is a side view of a blower assembly and evaporator according to some embodiments;

[0037] FIG30 is a top view of the fan assembly and evaporator in FIG29;

[0038] FIG31 is another front view of a blower assembly and an evaporator according to some embodiments;

[0039] FIG32 is a top view of a heat pump water heater according to some embodiments;

[0040] FIG33 is a partial structural diagram of a heat pump device according to some embodiments;

[0041] FIG34 is another side view of a blower assembly and evaporator according to some embodiments;

[0042] FIG35 is a structural diagram of a filter assembly according to some embodiments;

[0043] FIG36 is a structural diagram of a filter assembly and a second shell according to some embodiments. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] “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.

[0049] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0050] 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.

[0051] 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).

[0052] 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.

[0053] 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.

[0054] As shown in Figure 1, the heat pump water heater 100 includes a water tank assembly 1 and a heat pump device 2. As shown in Figures 1 and 8, 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.

[0055] 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 .

[0056] As shown in Figures 1 to 3, 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.

[0057] 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.

[0058] 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 direct external air into the evaporator 23. After the refrigerant in the evaporator 23 absorbs heat, it returns to the compressor 22 and is compressed again. This cycle repeats, continuously transferring heat energy from the air to the water, thereby raising the water temperature within the water tank body 12.

[0059] 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. 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 FIG3 , the fan assembly 25 and the compressor 22 are located on either side of the evaporator 23 in the thickness direction (the left-right direction as shown in FIG8 ).

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Typically, when installing a heat pump water heater, the heat pump device 2 is assembled first, and then the heat pump device 2 and the water tank assembly 1 are assembled. However, due to the heavy weight of the compressor 22 and the evaporator 23, manual installation is difficult, resulting in low production efficiency and high production costs. In addition, there are safety hazards during the installation of the heat pump device 2 and the water tank assembly 1.

[0064] To address the aforementioned issues, the present disclosure provides a heat pump water heater 100, as shown in Figures 1 to 4. The heat pump device 2 of the heat pump water heater 100 further includes a base 28, which is disposed atop the water tank assembly 1. The compressor 22, evaporator 23, throttling assembly 24, fan assembly 25, and electrical control box 26 are respectively disposed on a side of the base 28 that is distal from the water tank assembly 1 (e.g., the upper side). The base 28 includes a base body 280 and a plurality of suspension structures 29, which are spaced apart along the circumference of the base body 280.

[0065] According to some embodiments of the heat pump water heater 100 of the present disclosure, by providing a hoisting structure 29 on the base body 280, after the heat pump device 2 is assembled, the heat pump device 2 can be hoisted at multiple hoisting structures 29 using external equipment (such as a crane, etc.), thereby assembling the heat pump device 2 with the water tank assembly 1. The provision of multiple hoisting structures 29 can make installation convenient and labor-saving, thereby improving the production efficiency of the heat pump water heater 100 and reducing the production cost of the heat pump water heater 100.

[0066] In some embodiments, as shown in Figures 3 and 4, the base body 280 includes a bottom wall 281 and side walls 282, with the side walls 282 connected to the outer periphery of the bottom wall 281. The hanging structure 29 includes at least one connecting wall 291, which is connected to the bottom wall 281, and the two ends of the connecting wall 291 are spaced apart from each other and respectively connected to the side walls 282. For example, the bottom end of the connecting wall 291 is connected to the bottom wall 281, and the connecting wall 291 can be provided on a side of the side wall 282 of the base body 280 adjacent to the center of the base body 280.

[0067] Thus, both ends of the connecting wall 291 are connected to the side wall 282, and the connecting wall 291 and the side wall 282 are arranged along the radial direction of the heat pump water heater 100, so that the hanging structure 29 can define a space for accommodating a hanging rope or a hook, etc. For example, one end of the hanging rope is connected to the hanging structure 29, and the other end of the hanging rope is connected to an external device (such as a crane).

[0068] Therefore, the connecting wall 291 is connected to the bottom wall 281 at one end along the up and down direction of the heat pump water heater 100, and is connected to the side wall 282 at both ends in the direction perpendicular to the radius of the bottom wall 281, which can increase the structural strength of the side wall 282 corresponding to the lifting structure 29, avoid the heat pump device 2 from falling off during the lifting process, and thus increase the reliability during lifting.

[0069] 4 , the connecting wall 291 includes a first sub-connecting wall 2911, a second sub-connecting wall 2912, and a third sub-connecting wall 2913. The first sub-connecting wall 2911 and the third sub-connecting wall 2913 are spaced apart from each other, one end of the first sub-connecting wall 2911 and one end of the third sub-connecting wall 2913 are respectively connected to the side wall 282, and the second sub-connecting wall 2912 is connected between the other end of the first sub-connecting wall 2911 and the other end of the third sub-connecting wall 2913.

[0070] Therefore, the setting of the first sub-connecting wall 2911, the second sub-connecting wall 2912 and the third sub-connecting wall 2913 can disperse the transmission direction of the stress inside the connecting wall 291, reduce the possibility of the base body 280 corresponding to the lifting structure 29 being deformed by the force, and further increase the structural strength of the lifting structure 29.

[0071] In some embodiments, as shown in Figures 4 and 6 , the distance between the first sub-connecting wall 2911 and the third sub-connecting wall 2913 decreases as the side wall 282 moves toward the center of the bottom wall 281. That is, the first sub-connecting wall 2911 and the third sub-connecting wall 2913 move closer to each other as they move toward the center of the bottom wall 281. For example, along the vertical direction of the heat pump water heater 100, the cross-sections of the first sub-connecting wall 2911, the second sub-connecting wall 2912, the third sub-connecting wall 2913, and the portion of the side wall 282 connected to the aforementioned connecting wall 291 are trapezoidal in shape.

[0072] In this way, the space occupied by the hoisting structure 29 on the base body 280 can be reduced. Furthermore, a larger space can be formed between the ends of the first sub-connecting wall 2911 and the third sub-connecting wall 2913 away from the second sub-connecting wall 2912 and the side wall 282, thereby preventing the first sub-connecting wall 2911 and the third sub-connecting wall 2913 from interfering with the hoisting process and facilitating the use of the hoisting structure 29.

[0073] In some embodiments, as shown in Figures 4 to 5B, the hanging structure 29 further includes a connection hole 2821. The connection hole 2821 is provided on the inner bottom surface of the bottom wall 281, and the connection hole 2821 is disposed opposite the connection wall 291. For example, the connection hole 2821 is provided at the junction of the bottom wall 281 and the side wall 282 of the base body 280. One end of a hanging rope can pass through the corresponding connection hole 2821 to connect to the hanging structure 29, and the other end of the hanging rope is connected to an external device. The external device uses the hanging rope to lift the heat pump device 2 and place it on top of the water tank assembly 1.

[0074] It is understood that the provision of the connection hole 2821 reduces the structural strength of the side walls 282 and bottom wall 281 corresponding to the lifting structure 29. The provision of the connection wall 291 can increase the structural strength around the connection hole 2821, thereby preventing deformation or breakage at the connection hole 2821. In addition, the connection hole 2821 also facilitates the installation of the lifting rope.

[0075] In some embodiments, as shown in FIG5B , the width of connection hole 2821 increases from top to bottom. That is, the side of connection hole 2821 adjacent to bottom wall 281 is larger. Connection hole 2821 has an inclined inner wall. When a sling is used to connect the lifting structure 29 to an external device, the sling can pass through connection hole 2821 and move along the inner wall of connection hole 2821 to the top of connection hole 2821, where it fits tightly against connection hole 2821.

[0076] Thus, the width of the connection hole 2821 increases from top to bottom, making it easier to fit the lifting rope into the connection hole 2821 to improve the lifting efficiency.

[0077] In some embodiments, as shown in Figures 7A and 7B, the lifting structure 29 includes a connecting plate 292. The connecting plate 292 includes a first sub-connecting plate 2921, a second sub-connecting plate 2922, a third sub-connecting plate 2923, and a fourth sub-connecting plate 2924, which are sequentially connected. The first sub-connecting plate 2921 to the fourth sub-connecting plate 2924 are located on a side of the side wall 282 near the center of the base body 280 and are connected to the bottom wall 281 of the base body 280. The first sub-connecting plate 2921 is connected to the side wall 282 and is disposed opposite the third sub-connecting plate 2923. The second sub-connecting plate 2922 is disposed opposite the fourth sub-connecting plate 2924.

[0078] The first sub-connecting plate 2921 has a first through hole 2821A, and the third sub-connecting plate 2923 has a second through hole 2821B. The first through hole 2821A and the second through hole 2821B are connected to form a connecting hole 2821. The lifting structure 29 protrudes from the edge of the side wall 282 of the base 28 to facilitate the installation of a lifting rope through the connecting hole 2821.

[0079] The hoisting structure 29 further includes a first reinforcing rib 293 and a second reinforcing rib 294. The first reinforcing rib 293 has its ends connected to the first sub-connecting plate 2921 and the third sub-connecting plate 2923, respectively. The second reinforcing rib 294 has its ends connected to the second sub-connecting plate 2922 and the fourth sub-connecting plate 2924, respectively, to further strengthen the hoisting structure 29.

[0080] In some embodiments, as shown in Figures 2 and 8, the water tank assembly 1 includes a mounting plate 13. For example, the mounting plate 13 is provided on the top of the first shell 11 to facilitate the installation of the heat pump device 2. A first accommodating chamber 10 is defined between the mounting plate 13 and the first shell 11, and the water tank body 12 is located in the first accommodating chamber 10. The base 28 is provided on a side of the mounting plate 13 away from the water tank assembly 1. The base 28 is connected to the mounting plate 13 to complete the assembly of the heat pump device 2 and the water tank assembly 1. In this way, the installation efficiency can be improved, and the supporting effect of the water tank assembly 1 on the heat pump device 2 can be improved.

[0081] In some embodiments, one of the mounting plate 13 and the base 28 is provided with at least one positioning groove 2822, and the other of the mounting plate 13 and the base 28 is provided with at least one positioning member 135, which is engaged in the positioning groove 2822 to connect the base 28 and the mounting plate 13.

[0082] As shown in FIG2 , a positioning groove 2822 is provided on the base 28, and a positioning member 135 is provided on the mounting plate 13. After the base 28 and the mounting plate 13 are assembled, the positioning member 135 engages with the positioning groove 2822. The positioning member 135 is configured to limit the rotation of the base 28 in the circumferential direction of the heat pump water heater 100.

[0083] Therefore, through the cooperation between the positioning member 135 and the positioning groove 2822, the assembly of the mounting plate 13 and the base 28 is facilitated, and the base 28 is limited, which is beneficial to increase the stability of the base 28 after installation.

[0084] In some embodiments, the orthographic projection of the base body 280 on a horizontal plane lies within the orthographic projection of the mounting plate 13 on a horizontal plane. As shown in Figures 5B and 6, at least a portion of the sidewall 282 of the base body 280 lies radially inward of the sidewall of the mounting plate 13 and is spaced apart from the sidewall of the mounting plate 13. In other words, the portion of the base body 280 where the lifting structure 29 is located is spaced apart from the sidewall 282 corresponding to the lifting structure 29. This prevents the sidewall of the mounting plate 13 from interfering with the removal of the lifting rope after the base 28 is assembled with the mounting plate 13.

[0085] As shown in Figures 3 to 5B, a positioning groove 2822 is provided on the base body 280, and the positioning groove 2822 extends through at least a portion of the sidewall 282 of the base body 280 to form an opening. A positioning member 135 is provided on the mounting plate 13. After the positioning member 135 engages with the positioning groove 2822, at least a portion of the positioning member 135 extends radially from the opening in a direction away from the center of the base body 280 and is located on a side of the sidewall 282 of the base body 280 adjacent to the sidewall of the mounting plate 13. Along the axial direction of the heat pump water heater 100, the cross-sectional area of ​​the positioning member 135 is greater than the cross-sectional area of ​​the opening. This increases the convenience and accuracy of installation of the base body 280 and the mounting plate 13.

[0086] In some embodiments, as shown in Figures 4 and 5B , the cross-sectional area of ​​the positioning member 135 increases from top to bottom along the axial direction of the heat pump water heater 100, and the shape of the positioning groove 2822 matches the shape of the positioning member 135. The positioning member 135 has at least one fifth guide surface 1351, which is inclined from top to bottom toward the suspension structure 29. For example, the orthographic projection of the positioning member 135 on the corresponding sidewall 282 of the base body 280 can be trapezoidal in shape, and the shape of the positioning groove 2822 is the same as that of the positioning member 135.

[0087] When the positioning groove 2822 engages with the positioning member 135, the fifth guide surface 1351 contacts and abuts against the inner wall of the positioning groove 2822, thereby cooperating with the positioning member 135 to improve the stability of the connection between the base 28 and the mounting plate 13. Furthermore, since the top cross-sectional area of ​​the positioning member 135 is small, the positioning member 135 is easily engaged with the positioning groove 2822, thereby improving the assembly efficiency of the base 28 and the mounting plate 13.

[0088] In some embodiments, the positioning groove 2822 and the positioning member 135 are disposed adjacent to the hanging structure 29. For example, on the sidewall 282 of the base body 280, the positioning groove 2822 is spaced apart from the corresponding connection hole 2821. This allows the positioning groove 2822 and the hanging structure 29 to be located on the same side of the base 28, making it easier for installers to observe the proper alignment of the positioning groove 2822 and the positioning member 135 during the hanging process. This improves the assembly efficiency of the base 28 and the mounting plate 13, thereby improving the overall assembly efficiency of the heat pump water heater 100.

[0089] As shown in Figures 8 to 10, 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., the accommodating chamber), in which the compressor 22, evaporator 23, throttling assembly 24, fan assembly 25, and electrical control box 26 are all located.

[0090] One of the second housing 21 and the mounting plate 13 is provided with an accommodating portion 131, and the other of the second housing 21 and the mounting plate 13 is provided with an engaging portion 215. The engaging portion 215 engages within the accommodating portion 131 to connect the second housing 21 and the mounting plate 13. For example, the second housing 21 includes the engaging portion 215, which may be a boss. The mounting plate 13 includes the accommodating portion 131, which may be a groove.

[0091] As shown in Figure 17, 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 11 and 14, the engaging portion 215 is provided on the inner wall of the second housing 21, located at the end 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.

[0092] 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.

[0093] As shown in Figure 1, the heat pump water heater 100 also includes a display device 27 (e.g., a display panel), which is disposed on the second housing 21. The display device 27 is configured to display the water temperature within the water tank body 12. When installing the display device 27 on the second housing 21, the second housing 21 can be pre-installed 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, further improving assembly efficiency.

[0094] In some embodiments, as shown in Figures 8, 10, and 17, 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. The mating portion 133 is provided on the circumference of the mounting plate body 132 and extends away from the first housing 11. The mating portion 133 has an accommodating portion 131 formed therein.

[0095] As shown in Figures 10 and 17, 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.

[0096] The mating portion 133 is located at the edge of the mounting plate body 132, facing away from the water tank assembly 1. Furthermore, 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.

[0097] 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.

[0098] As shown in Figures 11 to 14, 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.

[0099] 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.

[0100] In some embodiments, as shown in FIG11 , the display device 27 is disposed in the first sub-housing 211. 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. The second sub-housing 212 can then be connected to the first sub-housing 211, providing sufficient space for wiring operations.

[0101] 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.

[0102] 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.

[0103] 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, and 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.

[0104] 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.

[0105] In some embodiments, as shown in Figures 11 and 14 , the second housing 21 further includes at least one sealing member 216. The sealing member 216 is disposed on the inner sidewall of the second housing 21 and is located on a side of the second housing 21 adjacent to the mounting plate 13. For example, the sealing member 216 is located between two adjacent engaging portions 215 of the plurality of engaging portions 215. During installation, the sealing member 216 abuts against the outer circumferential surface of the mating portion 133.

[0106] 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 .

[0107] In some embodiments, as shown in FIG23 , at least one first limiting portion 136 is provided on the outer circumference of the mating portion 133. That is, the first limiting portion 136 is provided on a side of the mating portion 133 adjacent to the second housing 21. The sealing member 216 abuts against the first limiting portion 136, and the first limiting portion 136 can be supported on the corresponding sealing member 216.

[0108] In some embodiments, the at least one seal 216 includes a plurality of seals 216, and a plurality of first sub-seals 2161 are arranged at intervals along the circumference of the inner sidewall of the second housing 21. The at least one first stopper 136 includes a plurality of first stoppers 136, and the plurality of first stoppers 136 are arranged at intervals along the circumference of the mounting plate 13.

[0109] In this way, the cooperation between the first limiting portion 136 and the sealing member 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, a waterproof effect can be further achieved.

[0110] 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 11 and 13, 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 seal 216.

[0111] As shown in Figure 17, two second stoppers 134 are provided on one side of the mating portion 133, adjacent to the center of the mounting plate body 132. The two second stoppers 134 may face each other radially relative to the mounting plate body 132. During installation, the first sub-engaging portion 2111 and the second sub-engaging portion 2121 respectively engage within the corresponding accommodating portion 131, and the latch 2113 abuts 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.

[0112] As shown in Figures 11 to 13, first sub-housing 211 further includes a first mounting post 2115. As shown in Figures 14 to 16, 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.

[0113] 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.

[0114] In some embodiments, the first sub-shell 211 is provided with at least one first connection portion 213, and the second sub-shell 212 is provided with at least one second connection portion 214, and the second connection portion 214 cooperates with the first connection portion 213 to improve the waterproof performance of the connection between the first sub-shell 211 and the second sub-shell 212.

[0115] 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.

[0116] The structures of the second connection portion 214 and the first connection portion 213 are described below by taking an example in which the first connection portion 213 has a groove and the second connection portion 214 has a protrusion.

[0117] As shown in Figures 18 to 20, 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.

[0118] 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.

[0119] As shown in Figure 19, 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.

[0120] As shown in Figure 21, 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.

[0121] 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.

[0122] 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.

[0123] 22 and 24 , 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.

[0124] 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.

[0125] In some embodiments, as shown in Figures 19 and 21, 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.

[0126] 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.

[0127] 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 FIG17 , 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.

[0128] Furthermore, referring to Figures 22 and 23, 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.

[0129] In some embodiments, there are two first connection parts 213 and two second connection parts 214. Referring to Figures 18 to 20, 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 ensure a waterproof effect at the connection between the first sub-housing 211 and the second sub-housing 212.

[0130] As shown in Figures 25 and 26, the fan assembly 25 includes a volute 251, a volute extension 252, and a wind wheel 255. The volute 251 is located on the 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. As shown in Figures 28 and 31, the second air inlet 2511 is located facing 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. The air entering the interior of the second housing 21 from the first air inlet 301 is suitable for flowing through the second air inlet 2511 and entering the fan assembly 25, and then being discharged from the second air outlet 2512 and the first air outlet 302.

[0131] In some embodiments, as shown in Figures 25 and 26, 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.

[0132] 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.

[0133] 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 side away from the evaporator 23, facilitating the installation of the second housing 21. Furthermore, 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.

[0134] Thus, providing the inclined volute extension 252 at the second air outlet 2512 of the volute 251 fully utilizes the space at the top of the evaporator 23, thereby increasing the area of ​​the second air outlet 2512 and facilitating alignment of the second air outlet 2512 with the first air outlet 302. This increases the air volume at the second air outlet 2512, allowing air to be discharged promptly and improving the utilization of the internal space of the second housing 21. Furthermore, this prevents interference between the second air outlet 2512 and the second housing 21 when the second housing 21 is assembled with the mounting plate 13, thereby preventing the assembly efficiency of the second housing 21 from being affected.

[0135] As shown in Figure 26, the volute extension 252 includes an opening section 253 and a connecting section 254. The connecting section 254 is connected to the opening section 253 and is closer to the volute 251 than the opening section 253. One end of the opening section 253 is opposite the first air outlet 302. For example, the cross-section of the opening section 253 is circular. One end of the connecting section 254 is connected to the other end of the opening section 253, and the other end of the connecting section 254 is connected to the second air outlet 2512. For example, the cross-section of the other end of the connecting section 254 is generally rectangular.

[0136] In some embodiments, air flowing out of the second air outlet 2512 passes through the connecting section 254 and the opening section 253 in sequence before flowing out of the first air outlet 302. The cross-sectional shape of the opening section 253 matches the shape of the first air outlet 302, thereby facilitating an increase in the air outlet area of ​​the volute extension 252. The cross-sectional shape (e.g., rectangular) of the end of the connecting section 254 away from the opening section 253 matches the shape of the second air outlet 2512. This increases the air outlet area of ​​the second air outlet 2512, thereby increasing the air output of the volute 251 and improving the heat exchange efficiency of the evaporator 23.

[0137] As shown in FIG27 , the connecting section 254 includes a first surface 2541, a second surface 2542, a third surface 2543, a fourth surface 2544, a fifth surface 2545, and a sixth surface 2546, which are sequentially connected along the circumference of the second air outlet 2512 of the volute 251. The first surface 2541 is connected to the evaporator 23 and the second surface 2542, respectively. The fourth surface 2544 is opposite to the side of the evaporator 23 facing the fan assembly 25. The sixth surface 2546 is connected to the fifth surface 2545 and the evaporator 23, respectively, and is opposite to the first surface 2541.

[0138] For example, one side of the first surface 2541 is connected to the evaporator 23, one side of the second surface 2542 is connected to the other side of the first surface 2541, one side of the third surface 2543 is connected to the other side of the second surface 2542, one side of the fourth surface 2544 is connected to the other side of the third surface 2543, and the fourth surface 2544 is opposite to the surface of the evaporator 23 facing the fan assembly 25. One side of the fifth surface 2545 is connected to the other side of the fourth surface 2544, one side of the sixth surface 2546 is connected to the other side of the fifth surface 2545, and the other side of the sixth surface 2546 is connected to the evaporator 23, and the sixth surface 2546 is opposite to the first surface 2541. Furthermore, at least the second to fifth surfaces 2545 extend obliquely toward the evaporator 23 along the direction from the second air outlet 2512 toward the first air outlet 302 (i.e., from bottom to top).

[0139] It should be noted that the outer circumferences of the first to sixth surfaces 2541 to 2546 are irregular curved surfaces. For example, the curvature radius of the portion of the fourth surface 2544 adjacent to the opening section 253 is greater than the curvature radius of the portion of the fourth surface 2544 adjacent to the second air outlet 2512.

[0140] The end surface of the second air outlet 2512 includes a first connecting segment, a second connecting segment, a third connecting segment, a fourth connecting segment, a fifth connecting segment, and a sixth connecting segment. The area enclosed by the endpoints of the two ends of the first connecting segment along the direction of the central axis of the opening segment 253 (i.e., the up-down direction) and the line connecting the corresponding points of the opening segment 253 constitutes a first surface 2541. The same applies to the second surface 2542 to the sixth surface 2546. Thus, the first surface 2541 to the sixth surface 2546 extend obliquely from the second air outlet 2512 toward the opening segment 253, so that the volute extension 252 forms the lower end surface of the connecting segment 254 according to the shape of the second air outlet 2512, so as to ensure that the cross-sectional area of ​​the lower end surface of the connecting segment 254 is adapted to the second air outlet 2512, thereby increasing the air output of the volute 251.

[0141] As shown in Figure 27, the two corners of the second air outlet 2512 away from the evaporator 23 have a first rounded corner 256 and a second rounded corner 257, respectively. The second surface 2542 and the third surface 2543 are connected at the first rounded corner 256, and the fifth surface 2545 is connected at the second rounded corner 257. In other words, the second connecting section and the third connecting section form the first rounded corner 256, and the fifth connecting section forms the second rounded corner 257. The first rounded corner 256 and the second rounded corner 257 are formed during the molding process of the volute 251.

[0142] In some embodiments, the cross-sectional area of ​​the volute extension 252 decreases as the second surface 2542, the third surface 2543, and the fifth surface 2545 extend toward the opening section 253, thereby directing air toward the opening section 253. Thus, the provision of the first rounded corner 256 and the second rounded corner 257 facilitates reducing resistance to air flow within the volute 251 and facilitates the provision of the second surface 2542, the third surface 2543, and the fifth surface 2545, so that the connecting section 254 is compatible with the second air outlet 2512.

[0143] In some embodiments, as shown in Figures 27 and 28, the first surface 2541 extends obliquely toward the center of the volute 251 (the side where the impeller 255 is located in Figure 28) along the direction from the second air outlet 2512 to the opening section 253. The oblique arrangement of the first surface 2541 can prevent the opening section 253 from interfering with the installation of the second housing 21 and improve the utilization of the internal space of the second housing 21.

[0144] As shown in Figure 28 , the inclination angle of the first surface 2541 is β. Specifically, the included angle between the orthographic projection of the first surface 2541 on the first cross-section and the orthographic projection of the central axis of the opening section 253 on the first cross-section is β, where β satisfies the following: β ≤ 3°. Furthermore, the angle between the orthographic projection of the first surface 2541 on the evaporator 23 and the central axis of the opening section 253 is β, where β satisfies the following: β ≤ 3°.

[0145] It should be noted that the first cross section is a cross section of the wind turbine assembly 25 perpendicular to the central axis of the wind wheel 255. The central axis of the wind wheel 255 is the dotted line NN shown in FIG26 .

[0146] It is understood that the larger the angle β is, the greater the inclination angle of the first surface 2541 is, and the greater the change in direction of the air when flowing through the first surface 2541 is. Therefore, the air may generate vortices near the first surface 2541, thereby affecting the flow rate of the air in the volute extension 252 and reducing the air output of the second air outlet 2512.

[0147] Thus, the included angle β between the first surface 2541 and the central axis of the opening section 253 is limited so that the first surface 2541 is located within the preset position range, which facilitates the volute extension 252 to be opposite to the first air outlet 302 and ensures the air outlet effect.

[0148] In some embodiments, as shown in FIG. 29 , the fourth surface 2544 extends obliquely toward the evaporator 23 along the direction from the second air outlet 2512 toward the opening section 253 . The inclination angle of the fourth surface 2544 is α, where α satisfies the following: α ≤ 5°. Specifically, the angle α between the orthographic projection of the fourth surface 2544 on the second cross-section and the orthographic projection of the central axis of the opening section 253 on the second cross-section is α, where α satisfies the following: α ≤ 5°.

[0149] It should be noted that the second cross section is a longitudinal plane passing through the central axis of the wind wheel 255, and the longitudinal plane extends along the central axis of the opening section 253. That is, the second cross section is a cross section of the fan assembly 25 passing through the dotted line MM in Figure 28.

[0150] It is understood that the larger the angle α, the greater the inclination angle of the fourth surface 2544. Influenced by the inclination angle of the fourth surface 2544, the air may also generate vortexes near the fourth surface 2544, thereby affecting the flow rate of the air in the volute extension 252 and reducing the air output of the second air outlet 2512.

[0151] Therefore, limiting the angle α between the fourth surface 2544 and the central axis of the opening section 253 can improve the air outlet effect of the volute extension 252 and effectively reduce the resistance of the volute extension 252 to the air flow, ensuring that the air in the second air outlet 2512 can be discharged from the volute extension 252 in a timely manner.

[0152] 27 and 30 , the evaporator 23 further includes a relief portion 231, with the volute extension 252 partially located within the relief portion 231. The relief portion 231 is configured to avoid the volute extension 252. The ratio of the first orthographic projection area of ​​the relief portion 231 on a horizontal plane to the second orthographic projection area is A. The second orthographic projection area is the orthographic projection area of ​​the end of the volute extension 252 (i.e., the opening section 253) away from the second air outlet 2512 on the horizontal plane. A satisfies the following: 1 / 6 ≤ A ≤ 1 / 2.

[0153] It is understood that the smaller the ratio A of the orthographic projection area of ​​the escape portion 231 to the opening section 253, the smaller the space in the escape portion 231. In this case, the volute extension 252 cannot effectively utilize the internal space of the evaporator 23, resulting in a large overall volume of the evaporator 23 and volute 251, which is detrimental to the miniaturization of the heat pump device 2. Furthermore, insufficient space in the escape portion 231 affects the cross-sectional area of ​​the opening section 253, thereby affecting the airflow effect.

[0154] The larger the ratio A of the orthographic projection area of ​​the avoidance portion 231 to the opening section 253, the smaller the area of ​​the intersection of the orthographic projection of the opening section 253 and the second air outlet 2512 on the horizontal plane. Therefore, the air discharge of the second air outlet 2512 may be interfered with, thereby reducing the air discharge efficiency of the second air outlet 2512.

[0155] Thus, by limiting the ratio of the orthographic projection area of ​​the avoidance portion 231 to that of the opening section 253 on a horizontal plane, it is convenient to arrange the first air outlet 302 relative to the opening section 253, thereby preventing the first air outlet 302 from interfering with the installation of the opening section 253. Furthermore, the compactness of the volute extension 252, volute 251, and evaporator 23 can be improved, thereby increasing the space inside the volute 251. Furthermore, the air outlet efficiency of the volute extension 252 can be ensured, allowing air to quickly flow from the second air outlet 2512 to the first air outlet 302, and then be discharged from the first air outlet 302.

[0156] As shown in FIG31 , the connection between the end of the volute extension 252 (i.e., the bottom end) away from the opening section 253 and the evaporator 23 is transitioned through a third rounded corner 258. When air flows out of the second air outlet 2512, it can pass through the third rounded corner 258 at the connection between the volute extension 252 and the evaporator 23 and flow toward the volute extension 252. This increases the air guidance at the connection and prevents significant changes in the air flow direction at this connection, which could affect the air outlet efficiency of the volute extension 252.

[0157] As shown in Figures 26 and 29, the volute 251 includes a third shell 2513 and a fourth shell 2514 that are interconnected along the central axis of the impeller 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 connected. 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 and help improve the installation efficiency of the volute 251.

[0158] As shown in Figures 31 and 34, the second air inlet 2511 of the volute 251 is connected to the side panel of the evaporator 23. After passing through the pipes of the evaporator 23 for heat exchange, the air reaches the location of the side panel of the evaporator 23 and then enters the volute 251 through the second air inlet 2511. Thus, the third housing 2513 and the side panel of the evaporator 23 are integrally formed, which can ensure the sealing between the volute 251 and the evaporator 23 and help increase the air intake of the second air inlet 2511.

[0159] As shown in FIG29 , along the thickness direction of the evaporator 23 , that is, the central axis direction of the wind wheel 255 , the ratio of the width of the third shell 2513 to the width of the fourth shell 2514 is B, and B satisfies: 3 / 7≤B≤1.

[0160] It is understood that if the width ratio B between the third housing 2513 and the fourth housing 2514 is less than 3 / 7, the internal space of the evaporator 23 cannot be fully utilized, and the structural strength of the connection between the third housing 2513 and the evaporator 23 may be reduced. If the width ratio B between the third housing 2513 and the fourth housing 2514 is greater than 1, the third housing 2513 is likely to interfere with the internal structure of the evaporator 23, affecting the air output of the second air outlet 2512.

[0161] Therefore, by limiting the width ratio of the third shell 2513 and the fourth shell 2514, the third shell 2513 can reasonably utilize the space of the side panel, so that the volute extension 252 is opposite to the first air outlet 302, ensuring the connection strength between the third shell 2513 and the evaporator 23, and increasing the internal space of the volute 251, thereby increasing the air intake and air outlet of the volute 251.

[0162] In some embodiments, as shown in FIG. 25 , 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 .

[0163] In some embodiments, as shown in Figure 8, the first air inlet 301 and the first air outlet 302 are respectively located on both sides of the evaporator 23, 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.

[0164] 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.

[0165] As shown in Figure 32, 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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°.

[0170] 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.

[0171] In some embodiments, as shown in Figures 22 and 23, 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 electronic control box 26.

[0172] In this way, the electric control box 26 can be prevented from blocking the first air inlet 301 , thereby increasing the air intake of the second housing 21 and achieving cooling of the compressor 22 .

[0173] In some embodiments, as shown in Figures 31, 33, and 34, 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. For example, the second air inlet 2511 and the electrical control box 26 are located on opposite sides of the evaporator 23. Air entering the interior of the second housing 21 from the first air inlet 301 first passes through the compressor 22, then passes through the electrical control box 26 and the evaporator 23, and ultimately flows into the second air inlet 2511.

[0174] 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 33) 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 33) 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.

[0175] 34 , the center of the second air inlet 2511 is located on a side of the first center plane adjacent to the base body 280 . The first center plane is the center plane in the height direction of the evaporator 23 and extends along the central axis of the evaporator 23 .

[0176] It should be noted that the height direction of the evaporator 23 is the up-down direction shown in FIG. 34 , and the width direction of the evaporator 23 is the left-right direction shown in FIG. 34 .

[0177] 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.

[0178] As shown in Figure 33, 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 entering the second housing 21 through the first air inlet 301, air 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.

[0179] It is understood that the smaller the angle θ, the smaller the air flow between the electrical box 26 and the evaporator 23, which may reduce the heat dissipation capacity of the electrical box 26 and weaken the heat exchange capacity of the evaporator 23. The larger the angle θ, the more air flowing to the evaporator 23 will be blocked by the electrical box 26, and turbulence will be more likely to occur on the surface of the electrical box 26, causing air loss, reducing the air flow into the evaporator 23, and further affecting the heat exchange efficiency of the evaporator 23.

[0180] 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.

[0181] As shown in Figures 35 and 36, the heat pump water heater 100 also includes a filter assembly 4. The filter assembly 4 is disposed in the second shell 21, and the filter assembly 4 is opposite to the first air inlet 301. The filter assembly 4 can be disposed at the top opening of the second shell 21 and be detachably connected to the second shell 21. For example, a mounting groove is provided on the top side wall of the second shell 21, and the filter assembly 4 cooperates with the mounting groove to achieve assembly with the second shell 21. Alternatively, the filter assembly 4 includes a filter 41 and a mounting bracket 42, the filter 41 is detachably disposed on the mounting bracket 42, and the mounting bracket 42 and the second shell 21 are integrally formed.

[0182] In some embodiments, the filter 41 has guide ribs 411. The mounting bracket 42 includes a bracket body and mounting slots 421. The bracket body has a third through hole, which is opposite the first air inlet 301. The mounting slots 421 are provided on both sides of the bracket body. The guide ribs 411 cooperate with the mounting slots 421 to ensure a stable installation of the filter 41 on the mounting bracket 42, preventing the filter 41 from shaking relative to the mounting bracket 42.

[0183] Thus, when the filter assembly 4 is detachably connected to the second housing 21, the filter assembly 4 and the second housing 21 can be manufactured separately, thereby reducing the difficulty of the process and improving the efficiency of installation. When the mounting bracket 42 included in the filter assembly 4 is integrally formed with the second housing 21, the structural strength of the second housing 21 can be improved, the replacement of the filter 41 can be facilitated, and the cost of subsequent maintenance can be reduced.

[0184] 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, the water tank assembly comprising: a first shell; A water tank body, disposed in the first shell, the water tank body having a water inlet and a water outlet; and a condenser disposed in the first shell and configured to release heat to heat the water in the water tank body; and A heat pump device, the heat pump device is located on the top of the water tank assembly, and the heat pump device comprises: A compressor, the compressor having an air inlet and an air outlet, the air outlet being connected to the condenser; an evaporator connected to the air inlet and configured to absorb heat from the air; a fan assembly, located at one side of the evaporator and configured to introduce external air into the evaporator; A throttling assembly is provided 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; and an electric control box, wherein the electric control box and the compressor are located on the other side of the evaporator opposite to the one side, and the electric control box is coupled to the compressor, the fan assembly and the throttling assembly; wherein the heat pump device further comprises a base, wherein the base is arranged on the top of the water tank assembly, and the compressor, the evaporator, the fan assembly, the electric control box and the throttling assembly are respectively arranged on a side of the base away from the water tank body; The base comprises a base body and a plurality of hanging structures, wherein the plurality of hanging structures are arranged at intervals along the circumference of the base body, so that the base can be installed on the top of the water tank assembly through the hanging structures.

2. The heat pump water heater according to claim 1, wherein: The base body comprises: a bottom wall; and A side wall connected to the outer periphery of the bottom wall; Wherein, at least one of the plurality of lifting structures satisfies one of the following: The hoisting structure comprises: A connecting wall, the connecting wall is connected to the bottom wall, and two ends of the connecting wall are spaced apart from each other and respectively connected to the side walls; or, The hoisting structure comprises: A connecting hole is provided on the base body; and A connecting wall is arranged opposite to the connecting hole; the connecting wall is connected to the bottom wall, and two ends of the connecting wall are spaced apart from each other and respectively connected to the side walls.

3. The heat pump water heater according to claim 2, wherein: The connecting wall comprises: a first sub-connecting wall connected to the side wall; a second sub-connecting wall connected to the first sub-connecting wall; and The third sub-connecting wall is respectively connected to the side wall and the second sub-connecting wall, and the first sub-connecting wall and the third sub-connecting wall are spaced apart from each other.

4. The heat pump water heater according to claim 3, wherein: From the side wall toward the center of the bottom wall body, the distance between the first sub-connecting wall and the third sub-connecting wall tends to decrease.

5. The heat pump water heater according to any one of claims 1 to 4, wherein: The water tank assembly further comprises a mounting plate, the mounting plate being arranged on a side of the first shell close to the heat pump device; the base being arranged on a side of the mounting plate away from the first shell; the mounting plate being configured to support the heat pump device; One of the mounting plate and the base is provided with at least one positioning groove, and the other of the mounting plate and the base is provided with at least one positioning member, and the positioning member is engaged in the positioning groove to connect the mounting plate with the base.

6. The heat pump water heater according to claim 5, wherein: The orthographic projection of the base body on the horizontal plane is located within the orthographic projection of the mounting plate on the horizontal plane, and at least a portion of the side wall of the base body and the side wall of the mounting plate are spaced apart from each other; The positioning groove is provided on the base, and the positioning groove penetrates at least a portion of the side wall of the base body to form an opening; the positioning member is provided on the mounting plate, and the cross-sectional area of ​​the positioning member is from one side away from the base body to the other side. The end thereof tends to increase toward the end close to the base body; the positioning groove matches the positioning piece.

7. The heat pump water heater according to claim 5 or 6, wherein: The positioning groove and the positioning member are disposed adjacent to at least one of the plurality of lifting structures.

8. The heat pump water heater according to any one of claims 1 to 7, wherein: The heat pump device further includes a second shell, the water tank assembly further includes a mounting plate, the second shell is detachably connected to the mounting plate; a receiving cavity is formed between the mounting plate and the second shell, and 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, and the engaging portion is fitted in the accommodating portion to connect the second shell and the mounting plate.

9. The heat pump water heater according to claim 8, wherein: The engaging portion is arranged on the inner wall surface of the second shell; the mounting plate comprises: A mounting plate body connected to the first shell; and The matching portion is connected to the mounting plate body; the matching portion is arranged in the circumference of the mounting plate body and extends in a direction away from the first shell; the matching portion is located in the second shell, and the accommodating portion is arranged on the matching portion.

10. The heat pump water heater according to claim 9, wherein: The second housing includes a first sub-housing and a second sub-housing that are detachably connected; the at least one engaging portion includes a plurality of engaging portions, and the plurality of engaging portions include 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.

11. The heat pump water heater according to claim 10, wherein: The first sub-engaging parts located on both sides of the first sub-shell among the plurality of first sub-engaging parts have first guide surfaces; the second sub-engaging parts located on both sides of the second sub-shell among the plurality of second sub-engaging parts 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 sub-accommodating portions and a plurality of second sub-accommodating portions; at least two of the plurality of first sub-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 sub-accommodating portions have a fourth guide surface, and the fourth guide surface is in contact with the second guide surface.

12. The heat pump water heater according to claim 10 or 11, wherein: The plurality of second sub-engaging portions are respectively arranged close to ends of the second sub-shell.

13. The heat pump water heater according to any one of claims 10 to 12, wherein: The second shell further includes at least one sealing member, which is located on a side of the second shell adjacent to the mounting plate and abuts against the matching portion; wherein the sealing member is disposed between two adjacent snap-fitting portions among the plurality of snap-fitting portions.

14. The heat pump water heater according to claim 13, wherein: At least one first limiting portion is disposed on the outer periphery of the matching portion, and the sealing component abuts against the first limiting portion.

15. The heat pump water heater according to any one of claims 10 to 14, wherein: One of the first sub-shell and the second sub-shell is provided with a buckle, the mounting plate includes a second limiting portion, and the buckle abuts against the second limiting portion.

16. The heat pump water heater according to any one of claims 10 to 15, wherein: The first sub-shell is provided with at least one first connection portion, and the second sub-shell is provided with at least one second connection portion, and the second connection portion is fitted in the first connection portion.

17. The heat pump water heater according to claim 16, wherein: The first connecting portion comprises: a first section extending in an axial direction of the first housing; and a second section, one end of which is connected to the first section, and the other end of which extends in a direction toward the center of the first shell; The second connecting portion comprises: The fourth section extends along the axial direction of the first shell, and the first section is fitted in the first section. within; and 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; the fifth section is fitted in the fourth section.

18. The heat pump water heater according to claim 17, wherein: The second shell further includes a top cover, which is disposed 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.

19. The heat pump water heater according to claim 18, 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 section, one end of which is connected to the other end of the fifth section, and the other end of the sixth section extends obliquely in a direction away from the fifth section; the sixth section is fitted in the third section.

20. The heat pump water heater according to claim 19, wherein: The matching portion is located in the second shell; and along the axial direction of the second shell, the top end of the matching portion is higher than the bottom end of the first section.

21. The heat pump water heater according to any one of claims 18 to 20, wherein: The top cover has a first air inlet and a first air outlet; The evaporator is located between the first air inlet and the first air outlet; The fan assembly comprises: A volute, the volute having: A second air inlet, disposed opposite to the evaporator; and a second air outlet connected to the second air inlet, the second air outlet being opposite to and connected to the first air outlet along the axial direction of the second shell; a volute extension, one end of which is connected to the second air outlet, and the other end of which is opposite to the first air outlet; and from the second air outlet toward the first air outlet, the volute extension is inclined toward the evaporator; and The wind wheel is arranged in the volute, and the air entering the second shell from the first air inlet is suitable for flowing through the evaporator and exchanging heat with the evaporator, then entering the volute through the second air inlet and being discharged from the first air outlet through the second air outlet.

22. The heat pump water heater according to claim 21, wherein: The volute extension comprises: an opening section, opposite to the first air outlet; and The connecting section is connected to the opening section and the second air outlet respectively.

23. The heat pump water heater according to claim 22, wherein: The connecting section includes a first surface to a sixth surface connected in sequence, wherein: The first surface is connected to the evaporator and the second surface respectively; The fourth surface is opposite to a surface of the evaporator facing the fan assembly; The sixth surface is connected to the fifth surface and the evaporator respectively, and the sixth surface is opposite to the first surface.

24. The heat pump water heater according to claim 23, wherein: The first surface extends obliquely toward the center of the volute along the direction from the second air outlet to the first air outlet, and the angle between the orthographic projection of the first surface on the first section and the orthographic projection of the central axis of the opening section on the first section is β, and β satisfies: β≤3°; wherein the first section is a plane perpendicular to the central axis of the wind wheel.

25. The heat pump water heater according to claim 23 or 24, wherein: The fourth surface extends obliquely toward the evaporator along the direction from the second air outlet to the first air outlet, and the angle between the orthographic projection of the fourth surface on the second section and the orthographic projection of the central axis of the opening section on the second section is α, and α satisfies: α≤5°; wherein the second section is a plane passing through the central axis of the wind wheel.

26. The heat pump water heater according to any one of claims 21 to 25, wherein: The evaporator includes an avoidance portion to avoid the volute extension portion, and the ratio of a first orthographic projection area to a second orthographic projection area of ​​the avoidance portion on a horizontal plane is A, wherein the second orthographic projection area is the orthographic projection area of ​​an end of the volute extension portion away from the second air outlet on the horizontal plane, and A satisfies: 1 / 6≤A≤1 / 2.

27. The heat pump water heater according to any one of claims 21 to 26, wherein: The volute comprises: A third shell connected to the side plate of the evaporator; and The fourth shell is connected to the third shell and is located at a side of the third shell away from the evaporator.

28. The heat pump water heater according to claim 27, wherein: Along the thickness direction of the evaporator, a ratio of a width of the third shell to a width of the fourth shell is B, and B satisfies: 3 / 7≤B≤1.

29. The heat pump water heater according to any one of claims 21 to 28, wherein: The first air inlet is located at the other side of the evaporator and is arranged opposite to the compressor, and the air flow is suitable for entering the heat pump device through the first air inlet; the first air outlet is located at one side of the evaporator and is connected to the fan assembly; wherein, The first air inlet and the first air outlet are arranged non-centrally symmetrically with respect to the top cover.

30. The heat pump water heater according to claim 29, 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°.

31. The heat pump water heater according to claim 29 or 30, wherein: The second air inlet and the electric control box are located on both sides of the evaporator and are arranged opposite to each other, and the center of the second air inlet is located on one side of the evaporator close to the base body.

32. The heat pump water heater according to any one of claims 29 to 31, wherein: Along the 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 θ satisfies: 15°≤θ≤30°.

33. The heat pump water heater according to any one of claims 21 to 32, further comprising a filter assembly, wherein the filter assembly is disposed in the second shell and opposite to the first air inlet; wherein: The filter assembly satisfies one of the following requirements: The filter assembly is detachably connected to the second shell; or The filter assembly includes a filter and a mounting bracket. The mounting bracket is integrally formed with the second shell, and the filter is detachably arranged on the mounting bracket.

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