Housing assembly of heat pump water heater and heat pump water heater

Abstract

The utility model relates to the technical field of heat pump water heating equipment, and discloses a housing assembly of a heat pump water heater and the heat pump water heater, the housing assembly comprises a first sub-housing and a second sub-housing which are formed by folding, the first sub-housing and the second sub-housing form a heat exchange space for accommodating a heat exchanger, the top of the first sub-housing is provided with an air inlet, and the top of the second sub-housing is provided with an air outlet. An air outlet is formed in the top of the second sub-shell, and an interlayer cavity communicated with the air inlet is formed in the side wall of the first sub-shell; a plurality of through holes are formed in the inner side wall of the first sub-shell, and the interlayer cavity communicates with the heat exchange space through the through holes. Air firstly enters the interlayer cavity and then flows to the heat exchanger through the through holes, so that the air quantity flowing through the heat exchanger is more uniform, and the heat exchange efficiency of the heat exchanger is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump water heating equipment technology, and in particular to a housing assembly for a heat pump water heater and a heat pump water heater. Background Technology

[0002] In heat pump water heaters, both the air inlet and outlet are located at the top for easy duct connection during installation. However, the heat exchanger, which is located inside the connector, is typically situated in the middle of the drip tray. Placing the air inlet at the top of the heat pump water heater can lead to a situation where the airflow from the inlet is greater at the top of the heat exchanger than at the bottom, resulting in insufficient heat exchange at the bottom of the heat exchanger. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a heat pump water heater casing assembly and a heat pump water heater, which effectively solves the problem of insufficient heat exchange in the lower part of the heat exchanger inside the casing assembly.

[0004] The above-mentioned technical problems are solved by the following technical solutions:

[0005] A housing assembly for a heat pump water heater, the housing assembly comprising:

[0006] The first sub-shell and the second sub-shell are joined together to form a heat exchange space for accommodating a heat exchanger. The top of the first sub-shell is provided with an air inlet, and the top of the second sub-shell is provided with an air outlet. The side wall of the first sub-shell is provided with a double-layer cavity communicating with the air inlet. The inner side wall of the first sub-shell is provided with a plurality of through holes, and the double-layer cavity is connected to the heat exchange space through the plurality of through holes.

[0007] Compared with the prior art, the casing assembly of the heat pump water heater described in this utility model has the following advantages: A heat exchange space for accommodating the heat exchanger is formed by the first and second sub-shells. An air inlet is provided at the top of the first sub-shell, and a double-layer cavity communicating with the air inlet is provided on the side wall of the first sub-shell to allow gas to enter. This allows gas to first enter the double-layer cavity from the air inlet. Furthermore, several through holes are provided on the inner side wall of the first sub-shell, allowing air in the double-layer cavity to flow through these holes to the heat exchanger inside the casing assembly. Since the heat exchange surface of the heat exchanger faces the double-layer cavity on the side wall of the first sub-shell, external air can flow directly to the heat exchange surface of the heat exchanger through the through holes, making the airflow through the heat exchanger more uniform and thus improving the heat exchange efficiency. In addition, with the above structure of this utility model, the selection of the air inlet and outlet positions has little impact on the air duct, making the arrangement of the air inlet and outlet positions more flexible and reasonable, thereby improving the applicability of the heat pump water heater.

[0008] In one embodiment, the central angle corresponding to the interlayer cavity is A, 170°≤A≤180°, and the height difference between the interlayer cavity and the first sub-shell is H, H≤3cm.

[0009] In one embodiment, the first sub-shell includes an inner shell and an outer shell covering the inner shell. The inner shell and the second sub-shell are joined together to form the heat exchange space. There is a gap between the outer side wall of the inner shell and the inner side wall of the outer shell to form the sandwich cavity. A plurality of the through holes are provided on the inner shell.

[0010] In one embodiment, a plurality of the through holes are arranged in a grid pattern covering the sidewalls of the inner housing.

[0011] In one embodiment, along the height direction of the inner housing, the diameter of the plurality of through holes gradually increases from top to bottom.

[0012] In one embodiment, there is a gap between the outer top wall of the inner shell and the inner top wall of the outer shell to form an air intake channel, which communicates with the interlayer cavity.

[0013] In one embodiment, the top of the inner housing is provided with an air inlet guide structure, which is positioned directly opposite the air inlet.

[0014] In one embodiment, the air inlet guide structure is a guide cone disposed on the top of the inner shell, or the air inlet guide structure is an arc-shaped protrusion disposed on the top of the inner shell.

[0015] In one embodiment, the air intake guide structure is formed by an upward protrusion from the top of the inner housing.

[0016] On the other hand, this utility model also provides a heat pump water heater, comprising:

[0017] Intermediate tray and heat exchanger mounted on the intermediate tray;

[0018] The enclosure assembly described above covers the heat exchanger.

[0019] Beneficial effects: Since heat pump water heaters include a casing assembly, they have the same effects as the casing assembly, which will not be elaborated here. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of a heat pump water heater according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 The diagram shows a cross-sectional structure of a heat pump water heater.

[0023] Figure 3 for Figure 1 Another three-dimensional structural diagram of the heat pump water heater is shown;

[0024] Figure 4 This is a schematic diagram of the structure of the first housing in a heat pump water heater according to an embodiment of the present utility model;

[0025] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the first shell shown;

[0026] Figure 6 This is a schematic diagram of the structure of the second housing in a heat pump water heater according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Casing assembly; 110. First sub-casing; 111. Outer shell; 112. Inner shell; 113. Through hole; 114. Guide cone; 115. Air inlet; 116. Fixed flange; 117. Interlayer cavity; 118. Air inlet flange; 120. Second sub-casing; 121. Air outlet; 122. Air outlet flange; 130. Intermediate tray; 131. Heat exchanger; 132. Compressor; 133. Connecting pipeline; 134. Four-way valve; 135. Expansion valve; 140. Fan assembly; 20. Water tank. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] According to embodiments of the present invention, such as Figures 1 to 6 As shown, a heat pump water heater housing assembly 10 is provided, including: a first sub-shell 110 and a second sub-shell 120 formed by joining together, the first sub-shell 110 and the second sub-shell 120 forming a heat exchange space for accommodating a heat exchanger 131, the top of the first sub-shell 110 is provided with an air inlet 115, the top of the second sub-shell 120 is provided with an air outlet 121, the side wall of the first sub-shell 110 is provided with a double-layer cavity 117 communicating with the air inlet 115; the inner side wall of the first sub-shell 110 is provided with a plurality of through holes 113, and the double-layer cavity 117 is communicating with the heat exchange space through the plurality of through holes 113.

[0032] In this embodiment, a refrigeration assembly is mounted on the intermediate tray 130, and an outer shell covers the refrigeration assembly and the intermediate tray 130. Specifically, the outer shell is composed of a first sub-outer shell 110 and a second sub-outer shell 120 joined together, forming a heat exchange space for accommodating the heat exchanger 131. An air inlet 115 is provided at the top of the first sub-outer shell 110, and a double-glazed cavity 117 communicating with the air inlet 115 to allow gas entry is provided on the side wall of the first sub-outer shell 110. When external gas enters the outer shell through the air inlet 115, it first enters the double-glazed cavity 117 on the side wall of the first sub-outer shell 110. Since the heat exchange surface of the heat exchanger 131 faces the double-glazed cavity 117 on the side wall of the first sub-outer shell 110, external air can flow directly to the heat exchange surface of the heat exchanger 131 through several through holes 113, making the airflow through the heat exchanger 131 more uniform, thereby improving the heat exchange efficiency of the heat exchanger 131.

[0033] The refrigeration assembly includes a heat exchanger 131, which is located at the junction of the first sub-shell 110 and the second sub-shell 120, and faces the first sub-shell 110. Since the entire air-facing surface of the heat exchanger 131 faces the interlayer cavity 117 on the first sub-shell 110, external air flows through the interlayer cavity 117 and then through several through holes 113 in a horizontal direction towards the heat exchanger 131. This makes the airflow through the heat exchanger 131 more uniform, thereby improving the heat exchange efficiency of the heat exchanger 131. An air outlet 121 is provided at the top of the second sub-shell 120, allowing the gas passing through the heat exchanger 131 to be discharged from the air outlet 121, thus preventing the temperature inside the casing assembly 10 from becoming too high. Furthermore, by adopting the above-mentioned structure of this utility model, while improving the heat exchange efficiency of the heat exchanger 131, the air inlet 115 does not need to avoid tall components such as the electrical control box and compressor 132, making the position arrangement of the air inlet 115 more flexible and reasonable, thereby improving the overall aesthetics of the heat pump water heater.

[0034] In one embodiment, the central angle corresponding to the interlayer cavity 117 is A, 170°≤A≤180°, and the height difference between the interlayer cavity 117 and the first sub-shell 110 is H, H≤3cm.

[0035] In this embodiment, the central angle corresponding to the interlayer cavity 117 represents the coverage area of ​​the interlayer cavity 117 in the circumferential direction. By setting the range of the central angle A between 170° and 180°, the interlayer cavity on the side wall of the first sub-shell 110 can have a larger coverage area, thereby accommodating more air and facilitating air entry into the heat exchange space. Specifically, the central angle A can be 171°, 172°, 173°, 174°, 175°, 176°, 177°, 178°, 179°, 180°, etc., and can be set according to actual needs.

[0036] Furthermore, the height of the interlayer cavity 117 is its axial extension length, specifically the length of the inner shell 112 along the axial direction. The height of the first sub-shell 110 is its axial length, i.e., the height of the outer shell 111. By setting the height difference H between the interlayer cavity 117 and the first sub-shell 110 to ≤ 3cm, the height of the interlayer cavity 117 can be close to the height of the first sub-shell 110, allowing air to flow along the entire axial length of the interlayer cavity 117. Then, the air within the interlayer cavity 117 enters the heat exchange space through the guide structure, ensuring the uniformity of heat dissipation from the heat exchanger 131.

[0037] In one embodiment, the first sub-shell 110 includes an inner shell 112 and an outer shell 111 covering the inner shell 112. The inner shell 112 and the second sub-shell 120 are spliced ​​together to form a heat exchange space. There is a gap between the outer side wall of the inner shell 112 and the inner side wall of the outer shell 111 to form a sandwich cavity 117. A plurality of through holes 113 are provided on the inner shell 112.

[0038] In this embodiment, the first sub-shell 110 is configured as a composite shell formed by an inner shell 112 and an outer shell 111 covering the inner shell 112; the inner shell 112 and the second sub-shell 120 are joined together to form a heat exchange space. A gap exists between the outer side wall of the inner shell 112 and the inner side wall of the outer shell 111, forming a double-layered cavity 117 for gas entry. The double-layered cavity 117 extends circumferentially along the outer shell 111, allowing sufficient gas to enter the double-layered cavity 117. A plurality of through holes 113 are provided on the inner shell 112, guiding the gas entering the double-layered cavity 117 to flow more evenly into the heat exchange space.

[0039] like Figures 2 to 5 As shown, in one embodiment, a plurality of through holes 113 are arranged in a grid pattern covering the sidewalls of the inner housing 112.

[0040] In this embodiment, by providing multiple through holes 113 on the side wall of the inner shell 112, it can be ensured that the gas can be evenly distributed or flowed through the through holes 113, allowing the gas to flow smoothly through the inner shell 112 to the heat exchanger 131. By arranging the through holes 113 in a grid pattern across the side wall of the inner shell 112, gas can flow into the casing assembly 10 from each through hole 113, avoiding situations where the gas flow rate into the casing assembly 10 is too large or too small, thereby ensuring the heat exchange efficiency of the heat exchanger 131.

[0041] In one embodiment, along the height direction of the inner housing 112, the diameter of a plurality of through holes 113 gradually increases from top to bottom.

[0042] In this embodiment, when gas enters the interlayer cavity 117 through the air inlet 115, a certain flow velocity and pressure distribution will be formed inside the interlayer cavity 117. Generally, the airflow velocity and pressure are relatively high near the air inlet 115, and the airflow velocity and pressure will gradually decrease as the distance increases. Along the height direction of the inner shell 112, the diameter of the through hole 113 is set to gradually increase from top to bottom to adapt to the changes in pressure and flow velocity of the gas inside the interlayer cavity 117. Near the air inlet 115, the gas pressure is high and the flow velocity is fast. The smaller diameter can impede and divert the gas to a certain extent, preventing the gas from passing through the through hole 113 directly and quickly, resulting in excessive local airflow. As the distance from the air inlet 115 increases, the gas pressure and flow velocity gradually decrease. At this time, increasing the diameter allows the gas to pass through more smoothly, ensuring that the airflow of each through hole 113 is relatively uniform, thereby making the gas flow distribution in the entire interlayer cavity 117 more balanced. To provide a stable and uniform airflow to the heat exchanger 131, and to avoid problems such as poor heat exchange caused by uneven gas flow in the heat exchanger 131.

[0043] In one embodiment, the interlayer cavity 117 is provided with a uniform thickness.

[0044] In this embodiment, the uniform thickness of the interlayer cavity 117 provides a uniform flow space for the gas, ensuring a relatively uniform distribution of gas velocity and pressure at various locations. This avoids excessively fast or slow air velocity in certain areas due to variations in the thickness of the interlayer cavity 117, thereby ensuring that the gas flows uniformly through the guide structure to the heat exchanger, thus improving heat exchange efficiency.

[0045] In one embodiment, there is a gap between the outer top wall of the inner shell 112 and the inner top wall of the outer shell 111, forming an air intake channel, which is connected to the interlayer cavity 117.

[0046] In this embodiment, an air intake channel is formed by creating a gap between the outer top wall of the inner shell 112 and the inner top wall of the outer shell 111, thereby providing a specific airflow channel for the gas. After entering through the air inlet 115 on the outer shell 111, the gas can continue to flow along the air intake channel. Furthermore, the air intake channel is connected to the interlayer cavity 117, allowing the gas to flow into the interlayer cavity 117 under the guidance of the air intake channel, thereby providing the required gas for heat exchange in the heat exchanger 131 within the casing assembly 10.

[0047] In one embodiment, the top of the inner housing 112 is provided with an air inlet guide structure, which is positioned directly opposite the air inlet 115.

[0048] In this embodiment, the air inlet guide structure is located at the top of the inner shell 112 and directly opposite the air inlet 115. When gas enters the interlayer cavity 117 through the air inlet 115, it first flows through the air inlet guide structure, which diverts and diffuses the gas, allowing it to be more evenly distributed within the interlayer cavity 117. This ensures that the gas passes through the through hole 113 more evenly, thereby improving the uniform flow effect of the entire inner shell 112 and providing a more stable ventilation environment for the cover assembly 10. Simultaneously, it reduces noise caused by excessive gas resistance, which is beneficial for noise reduction in the heat pump water heater.

[0049] In one embodiment, the air intake guide structure is a guide cone 114 disposed on the top of the inner housing 112, or the air intake guide structure is an arc-shaped protrusion disposed on the top of the inner housing 112.

[0050] In this embodiment, when the air inlet guiding structure is a guide cone 114 located at the top of the inner shell 112, when gas enters from the air inlet 115, the gas flows along the air intake channel and contacts the guide cone 114, causing the air to flow along the conical surface of the guide cone 114. Since the diameter of the guide cone 114 gradually increases from top to bottom, the gas is guided to flow from the smaller diameter end to the larger diameter end, allowing the gas to flow more smoothly from the air inlet 115 into the interlayer cavity 117. Furthermore, the shape of the guide cone 114 reduces the resistance to gas flow, and the gradually increasing diameter conical surface allows the gas to smoothly transition into the interlayer cavity 117, thereby reducing the generation of eddies and turbulence. This effectively reduces noise caused by excessive gas resistance, which is beneficial for noise reduction in heat pump water heaters.

[0051] Similarly, when the air intake guide structure is an arc-shaped protrusion located on the top of the inner shell 112, after the gas enters from the air inlet 115, the gas flows along the air intake channel and contacts the arc-shaped protrusion, allowing the air to flow along the arc surface of the protrusion. This enables the gas to flow more smoothly from the air inlet 115 into the interlayer cavity 117. Moreover, the arc-shaped protrusion can reduce the resistance to gas flow, allowing the gas to smoothly transition into the interlayer cavity 117, thereby reducing the generation of eddies and turbulence. This can effectively reduce the noise caused by excessive gas resistance, which is beneficial for the noise reduction of the heat pump water heater.

[0052] In other possible implementations, the air inlet guide structure can be a guide vane, etc., not limited to a guide cone 114 or an arc-shaped protrusion, as long as it can achieve the function of guiding the gas. The specific choice can be made according to the actual use requirements.

[0053] In one embodiment, the air intake guide structure is formed by an upward protrusion from the top of the inner housing 112.

[0054] In this embodiment, the air inlet guide structure extends upward from the top wall surface of the inner shell 112 and forms a protrusion, which faces the air inlet on the outer shell 111. When gas enters from the air inlet at the top of the outer shell 111, it encounters the upwardly protruding air inlet guide structure. The gas changes its flow direction along the curvature or shape of the air inlet guide structure surface, thereby being guided into the interior of the interlayer cavity 117, so that the gas is evenly distributed inside the interlayer cavity 117. By reasonably designing the shape and position of the protrusion, it is possible to avoid the airflow concentrating in certain local areas within the interlayer cavity 117, reducing airflow turbulence and eddy current generation; it can effectively reduce the noise caused by excessive gas resistance, which is beneficial to the noise reduction of the heat pump water heater.

[0055] In one embodiment, the bottom of the inner housing 112 is provided with a flange that folds toward the outer housing 111. The flange is connected to the inner wall of the outer housing 111, and there is a gap between the flange and the bottom wall of the outer housing 111 so that the bottom of the outer housing 111 forms a fixed flange 116.

[0056] In this embodiment, by providing a flange at the bottom of the inner shell 112 and folding the flange towards the outer shell 111, the flange can be connected to the inner wall of the outer shell 111, thereby tightly combining the inner shell 112 and the outer shell 111 to form a sandwich cavity 117 for gas entry. A fixing flange 116 is formed at the bottom of the flange, which provides a point of force for connecting the first sub-shell 110 to the intermediate tray 130 or water tank 20. Specifically, it can be connected to the corresponding mounting structure on the intermediate tray 130 or water tank 20 through bolts, clips, or other connectors, so as to securely install the first sub-shell 110 in the designated position. Moreover, when the fixing flange 116 is engaged with the intermediate tray 130 or water tank 20, the fixing flange 116 can also play a certain sealing role to prevent external contaminants from entering the water tank 20 or the interior of the cover assembly 10.

[0057] In one embodiment, the refrigeration assembly further includes a compressor 132, a four-way valve 134, and an expansion valve 135 connected to the heat exchanger 131 via a connecting pipe 133. The compressor 132, the four-way valve 134, the expansion valve 135, and the connecting pipe 133 are all installed on the side of the heat exchanger 131 near the inner shell 112.

[0058] In this embodiment, the compressor 132, four-way valve 134, expansion valve 135, and heat exchanger 131 form a closed-loop system via connecting pipe 133. The compressor 132 compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. The four-way valve 134 changes the flow direction of the refrigerant. The expansion valve 135 throttles and reduces the pressure of the high-temperature, high-pressure refrigerant liquid, transforming it into a low-temperature, low-pressure liquid. The heat exchanger 131 exchanges heat with the external environment. The connecting pipe 133 transports the refrigerant, allowing it to circulate among the components and complete the cooling or heating process.

[0059] By installing the compressor 132, four-way valve 134, expansion valve 135, and connecting pipe 133 on the side of the heat exchanger 131 near the inner shell 112, the internal space of the casing assembly 10 can be fully utilized, making the refrigeration component layout more compact. Furthermore, when gas enters the casing assembly 10 through the flow guide structure, it passes through components such as the compressor 132 before being blown onto the heat exchanger 131. This allows the heat exchanger 131 to help dissipate heat from the compressor 132 and other components, preventing overheating from affecting their performance or lifespan, and ensuring the heat exchange efficiency of the heat exchanger 131.

[0060] In one embodiment, a fan assembly 140 is also included, which is mounted on the side of the heat exchanger 131 away from the cooling assembly, and the air outlet 121 of the fan assembly 140 is connected to the air outlet 121 of the second sub-casing 120.

[0061] In this embodiment, the fan assembly 140 includes a fan and a volute. Both the fan and the volute are installed on the side of the heat exchanger 131 away from the refrigeration component. Under the action of the fan, gas flows into the heat exchanger 131 from one side, achieving heat exchange and enhancing the heat exchange effect of the heat exchanger 131. Then, the air outlet 121 of the fan assembly 140 is connected to the air outlet 121 of the second sub-outer shell 120, that is, the volute is connected to the air outlet 121. This allows the fan to draw the gas passing through the heat exchanger 131 into the volute, and under the guidance of the volute, the gas is discharged to the outside from the air outlet 121, preventing turbulent airflow inside the casing assembly 10 and thus improving the operational stability of the heat pump water heater. By placing the fan assembly 140 and the refrigeration component on opposite sides of the heat exchanger 131, the relative positions of the components are more rational, fully utilizing the internal space of the casing assembly 10 and avoiding interference between components.

[0062] like Figure 6 As shown, in one embodiment, the top of the outer casing 111 is provided with an air inlet flange 118 communicating with the air inlet 115, and the top of the second sub-outer casing 120 is provided with an air outlet flange 122 communicating with the air outlet 121.

[0063] In this embodiment, an air inlet flange 118 communicating with an air inlet 115 is provided on the top of the outer casing 111, so as to connect the air inlet flange 118 to an external air inlet pipe, thereby guiding external gas into the interior of the interlayer cavity 117. The air inlet flange 118 can perform preliminary guidance and rectification of the incoming gas, so that the gas can enter the interlayer cavity 117 more evenly through the air inlet 115.

[0064] An air outlet flange 122 is provided on the top of the second sub-casing 120, communicating with the air outlet 121, so as to connect the air outlet flange 122 to the exhaust duct and guide the gas after heat exchange from the casing assembly 10. The air outlet flange 122 can regulate the direction of airflow, allowing the gas to be discharged at a specific angle and path, avoiding airflow turbulence, while also reducing exhaust noise to a certain extent, and helping to effectively dissipate heat to the external environment.

[0065] Furthermore, the flange structure helps improve the sealing performance of the heat pump water heater. When connected to external pipes, sealing gaskets can be added to ensure a good seal between the inlet flange 118 and the inlet pipe, and between the outlet flange 122 and the outlet pipe, preventing air leakage and ensuring that the airflow follows the designed path, thereby improving the energy efficiency of the heat pump water heater.

[0066] On the other hand, this utility model also provides a heat pump water heater, including: an intermediate tray 130 and a heat exchanger 131 mounted on the intermediate tray 130; a casing assembly 10 covers the heat exchanger 131. Since the heat pump water heater includes the casing assembly 10, it has the same effect as the casing assembly 10, and will not be described in detail here.

[0067] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0068] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A housing assembly for a heat pump water heater, characterized in that, The housing assembly includes: A first sub-shell (110) and a second sub-shell (120) are assembled together. The first sub-shell (110) and the second sub-shell (120) form a heat exchange space for accommodating a heat exchanger (131). The top of the first sub-shell (110) is provided with an air inlet (115), and the top of the second sub-shell (120) is provided with an air outlet (121). The side wall of the first sub-shell (110) is provided with a sandwich cavity (117) communicating with the air inlet (115). The inner side wall of the first sub-shell (110) is provided with a plurality of through holes (113), and the sandwich cavity (117) is connected to the heat exchange space through the plurality of through holes (113).

2. The housing assembly of the heat pump water heater according to claim 1, characterized in that, The central angle corresponding to the interlayer cavity (117) is A, 170°≤A≤180°, and the height difference between the interlayer cavity (117) and the first sub-shell (110) is H, H≤3cm.

3. The housing assembly of the heat pump water heater according to claim 1, characterized in that, The first sub-shell (110) includes an inner shell (112) and an outer shell (111) covering the inner shell (112). The inner shell (112) and the second sub-shell (120) are spliced ​​together to form the heat exchange space. There is a gap between the outer side wall of the inner shell (112) and the inner side wall of the outer shell (111) to form the sandwich cavity (117). A plurality of through holes (113) are provided on the inner shell (112).

4. The housing assembly of the heat pump water heater according to claim 3, characterized in that, A number of the through holes (113) are arranged in a grid pattern on the sidewall of the inner shell (112).

5. The housing assembly of the heat pump water heater according to claim 4, characterized in that, Along the height direction of the inner shell (112), the diameter of the plurality of through holes (113) gradually increases from top to bottom.

6. The housing assembly of the heat pump water heater according to claim 3, characterized in that, There is a gap between the outer top wall of the inner shell (112) and the inner top wall of the outer shell (111) to form an air intake channel, which is connected to the interlayer cavity (117).

7. The housing assembly of the heat pump water heater according to claim 3, characterized in that, The top of the inner shell (112) is provided with an air inlet guide structure, which is positioned directly opposite the air inlet (115).

8. The housing assembly of the heat pump water heater according to claim 7, characterized in that, The air inlet guide structure is a guide cone (114) disposed on the top of the inner shell (112), or The air intake guide structure is an arc-shaped protrusion located on the top of the inner shell (112).

9. The housing assembly of the heat pump water heater according to claim 8, characterized in that, The air intake guide structure is formed by the upward protrusion of the top of the inner shell (112).

10. A heat pump water heater, characterized in that, include: Intermediate tray (130) and heat exchanger (131) mounted on the intermediate tray (130); The housing assembly (10) as described in any one of claims 1-9, wherein the housing assembly (10) covers the heat exchanger (131).

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