Nozzle assembly and heat pump water heater
By incorporating hook-fitting parts and hook-hanging parts into the heat pump water heater's head assembly, the problem of difficult disassembly of the head assembly is solved, enabling an efficient maintenance process and improving maintenance efficiency and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG VANWARD ELECTRIC
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-07
AI Technical Summary
The unit assembly of existing heat pump water heaters is difficult to disassemble during maintenance, resulting in low maintenance efficiency, especially due to its large size and height, which makes it inconvenient to transport.
A hook-and-hook assembly is provided on the front housing of the machine head assembly, and a hook-and-hook assembly is provided on the water receiving tray. The front housing and the rear housing are detachably connected and can be hooked onto the water receiving tray for maintenance, eliminating the need for handling and improving the convenience of disassembly and assembly.
The hook structure design reduces the difficulty of disassembly and assembly, improves maintenance efficiency, and makes the heat pump unit easy to operate during maintenance without affecting the maintenance process.
Smart Images
Figure CN224470435U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hot water equipment technology, and in particular to a head assembly and a heat pump water heater. Background Technology
[0002] In existing heat pump water heaters, the main unit assembly is typically mounted on top of the water tank assembly. This assembly includes a drip tray, a heat pump unit, and an integrated outer casing. The heat pump unit is mounted on the drip tray, and the outer casing covers the heat pump unit and is fixedly connected to the drip tray. When performing maintenance on this main unit assembly, the integrated outer casing is difficult to disassemble. Furthermore, due to the large size of heat pump water heaters and the considerable height of the main unit assembly, maintenance requires moving the outer casing to the ground or other available space, resulting in low maintenance efficiency. Utility Model Content
[0003] One of the technical problems solved by this utility model is to provide a machine head assembly that can improve maintenance efficiency;
[0004] The second technical problem solved by this utility model is to provide a heat pump water heater that can improve maintenance efficiency.
[0005] The first technical problem mentioned above is solved by the following technical solution:
[0006] The head assembly includes a water receiving tray, a heat pump unit, and an outer cover. The water receiving tray is provided with a hook part. The heat pump unit is disposed on the water receiving tray. The outer cover covers the heat pump unit. The outer cover includes a rear shell, a top cover, and a detachable front shell. The rear shell is fixed to the water receiving tray. The front shell and the rear shell are detachably connected. The front shell and the rear shell together form a barrel-shaped structure with openings at both the top and bottom. The top cover seals the upper opening of the barrel-shaped structure. The upper end of the front shell is provided with a hook engagement part that cooperates with the hook part.
[0007] Compared with the prior art, the head assembly of this utility model has the following advantages: The water tank assembly of a heat pump water heater is usually quite tall. The aforementioned head assembly has a hook-and-loop part on the front shell and a hook-and-loop part on the water tray. When the heat pump unit needs maintenance, the front shell and rear shell are separated, and the front shell is hooked onto the water tray. This eliminates the time spent placing the front shell on the ground or elsewhere and retrieving it from the ground or elsewhere, resulting in high maintenance efficiency. Furthermore, since only the front shell needs to be removed from the rear shell, compared to a single integrated cover, the front shell is smaller in size, easier to assemble and disassemble, and less difficult to install and disassemble. It is worth emphasizing that because the hook-and-loop part is located at the upper end of the front shell, when the front shell is hooked onto the water tray, the heat pump unit is exposed, which does not affect the maintenance personnel's ability to perform maintenance on the heat pump unit.
[0008] In one embodiment, the hook portion is configured as a limiting post, the hook engagement portion is configured as a hanging plate, the hanging plate is disposed on the side of the front shell facing the rear shell, and the hanging plate is provided with a hanging hole for the limiting post to pass through.
[0009] In one embodiment, the front shell is symmetrically provided with hanging plates at both ends opposite each other along the length direction, and the water receiving tray is provided with limiting posts that correspond one-to-one with the two hanging plates.
[0010] In one embodiment, the minimum distance between the hanging hole and the edge of the hanging plate away from the inner side of the front shell is between 5-15mm. The distance between the axes of the two limiting posts is d, the diameter of the water receiving tray is φ, and d / φ is between 0.8-0.9.
[0011] In one embodiment, the mounting plate is integrally injection molded with the front shell. The mounting plate includes a rear end face, a connecting surface, and an arc-shaped fitting surface connected end to end. The arc-shaped fitting surface is fitted to the inner side of the front shell. The connecting surface is disposed opposite to the connecting surface of another mounting plate. The connecting surface gradually approaches the other mounting plate from one end connected to the rear end face of the mounting plate to the other end.
[0012] In one embodiment, the angle α between the connecting surface of the mounting plate and the line connecting the left and right ends of the front shell is between 80° and 89°.
[0013] In one embodiment, the limiting post includes a main body and a limiting part. The lower end of the main body is fixedly connected to the water receiving tray, and the limiting part is provided at the upper end of the main body. In the same projection plane parallel to the water receiving tray, the projected area of the limiting part is larger than that of the main body.
[0014] In one embodiment, the front end width of the hanging hole is greater than the rear end width of the hanging hole, and the hanging hole only allows the limiting post to detach from the front end of the hanging hole.
[0015] In one embodiment, the limiting post is 5-10 mm above the edge of the water receiving tray.
[0016] In one embodiment, the mounting plate is provided with reinforcing ribs.
[0017] In one embodiment, the top cover is sandwiched between the front shell and the rear shell, and a guide groove is provided on the lower surface of the top cover, with the reinforcing ribs interlocking with the guide groove.
[0018] In one embodiment, the guide groove has a guide opening at one end facing the front shell, and the guide opening gradually narrows away from the front shell.
[0019] In one embodiment, the head assembly further includes an operation panel and an electronic control box, the electronic control box being built into the outer cover, and the operation panel being disposed on the front shell and connected to the electronic control box via a signal line.
[0020] The second technical problem mentioned above is solved by the following technical solution:
[0021] A heat pump water heater, comprising a water tank assembly and a head assembly as described above, the head assembly being disposed at the top of the water tank assembly.
[0022] Compared with the prior art, the heat pump water heater described in this utility model has the following advantages: The water tank assembly of a heat pump water heater is typically quite tall. The heat pump water heater has a hook-and-loop connection on the front shell of the unit assembly and a hook-and-loop connection on the water tray. When maintenance is required, the front shell and rear shell are separated, and the front shell is hooked onto the water tray. This eliminates the time spent placing the front shell on the ground or elsewhere and retrieving it from the ground or elsewhere, resulting in high maintenance efficiency. Furthermore, since only the front shell needs to be removed from the rear shell, its smaller size and easier disassembly and assembly compared to a single integrated casing are significant advantages. It is worth emphasizing that because the hook-and-loop connection is located at the upper end of the front shell, the heat pump unit is exposed when the front shell is hooked onto the water tray, which does not hinder maintenance personnel from performing maintenance on the heat pump unit. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of the heat pump water heater under normal operation provided in the embodiment of this utility model;
[0024] Figure 2 This is a schematic diagram of the structure of a heat pump water heater when the front shell hook is hung on the water receiving pan according to one embodiment of the present utility model;
[0025] Figure 3 for Figure 2 Enlarged schematic diagram of the structure where the hanging plate hook is attached to the limiting post at point A;
[0026] Figure 4 for Figure 3 A schematic diagram of the limiting post structure;
[0027] Figure 5 This is a schematic diagram of the structure of the hook being attached to the limiting post according to another embodiment of the present invention;
[0028] Figure 6 for Figure 5 A schematic diagram of the limiting post structure;
[0029] Figure 7 This is a top view of the heat pump water heater when the front shell hook is attached to the water receiving tray according to the embodiment of this utility model;
[0030] Figure 8 for Figure 7 Enlarged view of point B in the middle;
[0031] Figure 9 This is a three-dimensional structural diagram of the front shell provided in the embodiment of this utility model;
[0032] Figure 10 This is a top view of the front shell provided in an embodiment of the present utility model;
[0033] Figure 11 for Figure 10 Enlarged view of point C in the middle;
[0034] Figure 12 This is an exploded structural diagram of the top cover and front shell provided in an embodiment of the present utility model;
[0035] Figure 13 for Figure 12 Enlarged view of point D in the middle;
[0036] Figure 14 This is a bottom view of the top cover provided in an embodiment of the present utility model;
[0037] Figure 15 for Figure 14 Enlarged view of point E in the middle;
[0038] Figure 16 This is a schematic diagram of the reinforcing rib being inserted into the guide groove in an embodiment of this utility model.
[0039] Label Explanation:
[0040] 1. Water tray; 11. Limiting post; 111. Limiting part; 112. Main body; 2. Outer cover; 21. Front shell; 211. Hanging plate; 2111. Hanging hole; 2112. Rear end face; 2113. Connecting surface; 2114. Arc-shaped fitting surface; 212. Reinforcing rib; 22. Rear shell; 23. Top cover; 231. First guide block; 232. Second guide block; 233. Guide groove; 3. Heat pump unit; 4. Electrical control box; 5. Operation panel; 6. Outer shell. Detailed Implementation
[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0042] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0043] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0045] refer to Figures 1-2 As shown, an embodiment of this utility model proposes a head assembly and a heat pump water heater using the head assembly. The heat pump water heater includes a head assembly and a water tank assembly. The water tank assembly includes a shell 6 and an inner tank disposed within the shell 6, the inner tank being used to store domestic water. The head assembly is disposed on the top of the shell 6 and includes a drip tray 1, an outer cover 2, and a heat pump unit 3. The heat pump unit 3 is disposed on the drip tray 1, which is used to collect condensate dripping from the heat pump unit 3. The outer casing 2 is installed outside the heat pump unit 3 and fixedly connected to the water receiving tray 1. The outer casing 2 includes a rear shell 22, a top cover 23, and a detachable front shell 21. The front shell 21 and the rear shell 22 together form a barrel-shaped structure with openings at both ends. The rear shell 22 is fixed to the water receiving tray 1. The front shell 21 and the rear shell 22 are connected by bolts or snaps. The top cover 23 is sandwiched between the front shell 21 and the rear shell 22. The top cover 23 is fixedly connected to the rear shell 22 by means of connection not limited to bolts or snaps and seals the upper opening of the barrel-shaped structure. The upper end of the front shell 21 is provided with a hook engagement part, and the water receiving tray 1 is provided with a hook engagement part. The front shell 21 can be hooked onto the water receiving tray 1 through the mutually cooperating hook engagement parts.
[0046] The water tank assembly of a heat pump water heater is typically quite tall. The aforementioned unit assembly and heat pump water heater feature hook-and-loop fasteners on the front casing 21 and the water tray 1. When maintenance of the heat pump unit 3 is required, the front casing 21 is separated from the rear casing 22, and then the front casing 21 is hooked onto the water tray 1. This eliminates the time spent placing the front casing 21 on the ground or elsewhere, and retrieving it from the ground or elsewhere, resulting in high maintenance efficiency. Furthermore, since only the front casing 21 needs to be removed from the rear casing, its smaller size and easier disassembly and assembly compared to a single, integrated outer cover are advantageous. It is worth emphasizing that because the hook-and-loop fasteners are located at the upper end of the front casing 21, when the front casing 21 is hooked onto the water tray 1, the heat pump unit 3 is exposed, which does not hinder maintenance personnel from performing maintenance on the heat pump unit 3.
[0047] In some embodiments, to achieve a stable connection between the front shell 21 and the rear shell 22, the front shell 21 and the rear shell 22 are connected by bolts. For example, the left and right ends of the front shell 21 are respectively provided with two first mounting holes spaced vertically apart, and the corresponding positions of the rear shell 22 are provided with second mounting holes. Four bolts pass through the corresponding first mounting holes and second mounting holes to achieve a stable connection between the front shell 21 and the rear shell 22.
[0048] It is worth emphasizing that heat pump water heaters are generally installed against the wall, with the rear shell 22 located on the side of the outer casing 2 facing the wall, while the front shell 21 is located on the side of the outer casing 2 facing away from the wall, i.e., towards the room. Therefore, after the front shell 21 is removed from the rear shell 22, the heat pump unit 3 faces the maintenance personnel, making maintenance more convenient.
[0049] To improve aesthetics, the shapes of the outer cover 2 and the water tray 1 are adapted to the shape of the outer shell 6 in the water tank assembly. For example, if the outer shell 6 is cylindrical, then the outer cover 2 is cylindrical, and the water tray 1 is also circular. Furthermore, both the front shell 21 and the rear shell 22 are arc-shaped. Of course, the central angles of the front shell 21 and the rear shell 22 can be the same or different; that is, the arc lengths of the front shell 21 and the rear shell 22 can be the same or different. In some embodiments, to ensure that the rear shell 22 effectively supports the top cover 23 after the front shell 21 is removed from the rear shell 22, and to prevent the rear shell 22 from interfering with maintenance personnel, both the front shell 21 and the rear shell 22 are semi-circular arc-shaped. Of course, the outer cover 2 can also be set to a square or polygonal barrel shape depending on the actual shape of the outer shell 6.
[0050] More specifically, ventilation openings are provided on both the front casing 21 and the rear casing 22 to dissipate heat from the heat pump unit 3 and extend the service life of the heat pump unit 3.
[0051] In some embodiments, the hook part is configured as a limiting post 11, and the hook-and-hook mating part is configured as a hanging plate 211 with a hanging hole 2111 through which the limiting post 11 passes. The hanging plate 211 is located on the side of the front shell 21 facing the rear shell 22 and can be sleeved on the limiting post 11 to realize the hook-and-hook connection between the front shell 21 and the water receiving tray 1.
[0052] refer to Figure 7 As shown, the front shell 21 has symmetrical hanging plates 211 at its left and right ends, and the water receiving tray 1 has limiting posts 11 that correspond one-to-one with the two hanging plates 211. After the front shell 21 is removed from the rear shell 22, the hanging plates 211 at both ends of the front shell 21 are hooked onto the water receiving tray 1.
[0053] Understandably, the hanging hole 2111 is located at the rear end of the hanging plate 211 and away from the inner side of the front shell 21 (i.e., the side of the front shell 21 facing the rear shell 22), and the limiting post 11 is also located near the edge of the water receiving tray 1 to avoid interference between the hanging plate 211 and the outer shell 6 when the hanging plate 211 is hooked onto the water receiving tray 1. The rear end face of the hanging plate 211 is flush with or slightly protrudes from the two end faces of the front shell 21, so that the front shell 21 does not interfere with the water receiving tray 1 when the hanging plate 211 is hooked onto the water receiving tray 1.
[0054] In some embodiments, the minimum distance between the hanging hole 2111 and the edge of the hanging plate 211 away from the inner side of the front shell 21 is between 5 and 15 mm. For example, the minimum distance between the hanging hole 2111 and the edge of the hanging plate 211 away from the inner side of the front shell 21 is 6 mm.
[0055] Given that the outer shell 6 is cylindrical and the water tray 1 is circular, let the distance between the axes of the two limiting posts 11 be d, the diameter of the water tray 1 be φ, and d / φ be between 0.8 and 0.9, for example, d / φ = 0.8 or d / φ = 0.9. In this case, the size of the hanging plate 211 will not be too large, which helps to reduce the processing cost of the hanging plate 211, and the front shell 21 can abut against the outer shell 6. At this point, the hook-and-loop parts at both ends of the front shell 21 form the first and second support points with the hook-and-loop parts on the water tray 1, respectively. The left and right sides of the lower end of the front shell 21 abut against the outer shell 6 and form the third and fourth support points, ensuring that the front shell 21 is stably hooked onto the water tray 1.
[0056] refer to Figure 8 and Figure 11 As shown, in some embodiments, in order to reduce the possibility of the hanging plate 211 detaching from the limiting post 11, the limiting post 11 is set as T-shaped. The limiting post 11 includes a main body 112 and a limiting part 111. The lower end of the main body 112 is fixedly connected to the water receiving tray 1, and the upper end is provided with the limiting part 111. In the same projection plane parallel to the water receiving tray 1, the projected area of the limiting part 111 is larger than the projected area of the main body 112.
[0057] Furthermore, the front end width of the hanging hole 2111 is greater than the rear end width, so the limiting post 11 can only detach from the wider front end of the hanging hole 2111. Specifically, the hanging hole 2111 is designed in the shape of a teardrop, and the sidewall of the hanging hole 2111 includes a front sidewall, a rear sidewall, a first connecting sidewall, and a second connecting sidewall. Both the front and rear sidewalls are arc-shaped, and the radius of the front sidewall is greater than the radius of the rear sidewall. The two ends of the front sidewall are connected to the two ends of the rear sidewall through the first connecting sidewall and the second connecting sidewall, respectively, to form a teardrop-shaped structure. The main body 112 and the limiting part 111 of the limiting post 11 are both cylindrical, and the outer radius of the limiting part 111 is greater than the radius of the rear sidewall of the hanging hole 2111 but smaller than the radius of the front sidewall of the hanging hole 2111, so that it can detach smoothly from the front end of the hanging hole 2111.
[0058] When the hanging plate 211 is fitted onto the limiting post 11, the limiting part 111 is aligned with the wider end of the hanging hole 2111. Then, the limiting part 111 is passed through the hanging hole 2111, and the hanging plate 211 is moved horizontally to misalign the wider end of the hanging hole 2111 with the limiting part 111, thereby making it less likely for the hanging plate 211 to detach from the limiting post 11. Specifically, the limiting post 11 is 5-10mm higher than the edge of the water receiving tray 1, so as to further reduce the possibility of the hanging plate 211 detaching from the limiting post 11 while easily hanging the hanging plate 211 on it.
[0059] refer to Figure 5 and Figure 6 As shown, the limiting post 11 can be integrally injection molded with the water receiving tray 1. Or as... Figure 3 and Figure 4 As shown, the limiting post 11 includes a limiting sleeve and a screw. The limiting sleeve is integrally injection molded with the water receiving tray 1. The screw passes through the limiting sleeve and is threadedly connected to the limiting sleeve. At this time, the nut part of the screw is the limiting part 111, and the limiting sleeve is the main body part 112.
[0060] refer to Figure 10As shown, in some embodiments, the mounting plate 211 and the front shell 21 are integrally injection molded. The mounting plate 211 includes a rear end face 2112 connected end to end, a connecting surface 2113, and an arc-shaped fitting surface 2114. The arc-shaped fitting surface 2114 is fitted to the inner side of the front shell 21, and the connecting surface 2113 is arranged opposite to the connecting surface 2113 of another mounting plate 211. Based on the premise that the mounting plates 211 are symmetrically arranged at both ends of the front shell 21, in order to reduce the difficulty of demolding, the connecting surface 2113 gradually approaches the other mounting plate 211 from one end of the rear end face 2112 connecting the mounting plate 211 to the other end. Specifically, the angle α between the connecting surface 2113 of the mounting plate 211 and the line connecting the left and right ends of the front shell 21 is between 80° and 89°. For example, the angle α between the connecting surface 2113 of the mounting plate 211 and the line connecting the left and right ends of the front shell 21 is 80°, 82°, 85°, or 89°. If the included angle α is too large, it will increase the processing cost of the mounting plate 211; if the included angle α is too small, it will increase the difficulty of demolding. For example, the included angle α between the connecting surface 2113 of the mounting plate 211 and the line connecting the left and right ends of the front shell 21 is 85°.
[0061] Specifically, considering both structural strength and cost, the thickness of the hanging plate 211 is set to 1.55mm, and multiple reinforcing ribs 212 are also spaced apart on the hanging plate 211 to increase its strength. For example, any hanging plate 211 is provided with 3 reinforcing ribs 212.
[0062] refer to Figures 12-16 As shown, to reduce the assembly difficulty of the front shell 21, based on the setting of the reinforcing ribs 212 on the mounting plate 211, a guide groove 233 is provided on the lower surface of the top cover 23. The reinforcing ribs 212 can be inserted into the guide groove 233, thereby limiting the position of the front shell 21 relative to the top cover 23, and thus limiting the front shell 21 relative to the rear shell 22. It is worth emphasizing that the reinforcing ribs 212 are perpendicular to the line connecting the left and right ends of the front shell 21. That is to say, the reinforcing ribs 212 extend along the direction of movement when the front shell 21 is assembled to the rear shell 22, so that the end faces of the front shell 21 and the rear shell 22 are aligned. During assembly, the reinforcing ribs 212 can be inserted into the guide groove 233 first to align the end faces of the front shell 21 and the rear shell 22, and then the front shell 21 and the rear shell 22 can be connected. During the connection process, there is no need for manual assistance in limiting the front shell 21, thus reducing the assembly difficulty of the front shell 21. Specifically, based on the premise that multiple reinforcing ribs 212 are set on the mounting plate 211, multiple guide grooves 233 are also set. Of course, the number of guide grooves 233 can be less than the number of reinforcing ribs 212.
[0063] Specifically, the guide groove 233 has a guide opening at one end facing the front shell 21, and the guide opening gradually narrows away from the front shell 21. Specifically, the top cover 23 has a first guide block 231 and a second guide block 232 symmetrically arranged. The first guide block 231 and the second guide block 232 are both L-shaped and integrally injection molded with the top cover 23. The guide groove 233 is formed between the first guide block 231 and the second guide block 232.
[0064] In other embodiments, the hook and hanger part may also be a hanging plate 211 with a hanging hole 2111, and the hook and hanger mating part may be a hook, which will not be described in detail here.
[0065] In some embodiments, the head unit also includes an operation panel 5 and an electrical control box 4. The electrical control box 4 is built into the outer cover 2 and fixedly connected to the water receiving tray 1. The operation panel 5 is disposed on the front shell 21 and connected to the electrical control box 4 via a signal line. When the front shell 21 is hooked onto the water receiving tray 1, since the front shell 21 does not need to be removed from the water receiving tray 1, the operation panel 5 and the electrical control box 4 are still connected via the signal line. Therefore, the electrical control box 4 and the heat pump unit 3 can be controlled and tested by operating the operation panel 5. Specifically, the operation panel 5 is an embedded panel to improve aesthetics.
[0066] 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.
[0067] 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 head assembly, characterized in that, include: Water receiving tray (1), wherein a hook is provided on the water receiving tray (1); A heat pump unit (3) is mounted on the water receiving pan (1); The outer cover (2) is installed on the outside of the heat pump unit (3). The outer cover (2) includes a rear shell (22), a top cover (23) and a detachable front shell (21). The rear shell (22) is fixed to the water receiving tray (1). The front shell (21) and the rear shell (22) together form a barrel-shaped structure with openings at both ends. The top cover (23) seals the upper opening of the barrel-shaped structure. The upper end of the front shell (21) is provided with a hook engagement part that cooperates with the hook part.
2. The head assembly according to claim 1, characterized in that, The hook part is configured as a limiting post (11), and the hook mating part is configured as a hanging plate (211). The hanging plate (211) is located on the side of the front shell (21) facing the rear shell (22), and the hanging plate (211) has a hanging hole (2111) for the limiting post (11) to pass through.
3. The head assembly according to claim 2, characterized in that, The front shell (21) is symmetrically provided with hanging plates (211) at both ends, and the water receiving tray (1) is provided with limiting posts (11) that correspond one-to-one with the two hanging plates (211).
4. The head assembly according to claim 3, characterized in that, The minimum distance between the hanging hole (2111) and the edge of the hanging plate (211) away from the inner side of the front shell (21) is between 5-15mm. Let the distance between the axes of the two limiting posts (11) be d, and the diameter of the water receiving tray (1) be φ, with d / φ between 0.8-0.
9.
5. The head assembly according to claim 3, characterized in that, The mounting plate (211) is integrally injection molded with the front shell (21). The mounting plate (211) includes a rear end face (2112) connected end to end, a connecting surface (2113) and an arc-shaped fitting surface (2114). The arc-shaped fitting surface (2114) is fitted to the inner side of the front shell (21). The connecting surface (2113) is arranged opposite to the connecting surface (2113) of another mounting plate (211). The connecting surface (2113) gradually approaches the other mounting plate (211) from one end connected to the rear end face (2112) of the mounting plate (211) to the other end.
6. The head assembly according to claim 5, characterized in that, The angle α between the connecting surface (2113) of the mounting plate (211) and the line connecting the left and right ends of the front shell (21) is between 80° and 89°.
7. The head assembly according to claim 2, characterized in that, The limiting post (11) includes a main body (112) and a limiting part (111). The lower end of the main body (112) is fixedly connected to the water receiving tray (1), and the upper end of the main body (112) is provided with the limiting part (111). In the same projection plane parallel to the water receiving tray (1), the projected area of the limiting part (111) is greater than the projected area of the main body (112).
8. The head assembly according to claim 7, characterized in that, The front end width of the hanging hole (2111) is greater than the rear end width of the hanging hole (2111), and the hanging hole (2111) only allows the limiting post (11) to detach from the front end of the hanging hole (2111).
9. The head assembly according to claim 2, characterized in that, The limiting post (11) is 5-10 mm higher than the edge of the water receiving tray (1).
10. The head assembly according to claim 2, characterized in that, The hanging plate (211) is provided with reinforcing ribs (212).
11. The head assembly according to claim 10, characterized in that, The top cover (23) is sandwiched between the front shell (21) and the rear shell (22). The lower surface of the top cover (23) is provided with a guide groove (233), and the reinforcing rib (212) is inserted into the guide groove (233).
12. The head assembly according to claim 11, characterized in that, The guide groove (233) has a guide opening at one end facing the front shell (21), and the guide opening gradually narrows away from the front shell (21).
13. The head assembly according to any one of claims 1-12, characterized in that, The machine head assembly also includes an operation panel (5) and an electrical control box (4). The electrical control box (4) is placed on the water receiving tray (1), and the operation panel (5) is set on the front shell (21) and connected to the electrical control box (4) via a signal line.
14. A heat pump water heater, characterized in that, The heat pump water heater includes a water tank assembly and a head assembly as described in any one of claims 1-13, wherein the head assembly is disposed at the top of the water tank assembly.