Heat pump water heater and machine head assembly thereof

Abstract

The utility model discloses a heat-pump water heater and a machine head assembly thereof. The machine head assembly comprises a shell with a first air opening formed in the top wall and a second air opening formed in the peripheral wall; the heat exchanger is located in the shell and arranged at the second air opening, and a first air passing area is formed between the heat exchanger and the second air opening; the air guide ring is located in the shell, the upper end of the air guide ring covers the first air opening, the lower end of the air guide ring is located on the side, opposite to the first air passing area, of the heat exchanger, and the upper portion of the first air passing area is in sealing fit with the peripheral face of the air guide ring; and the fan assembly is arranged in the air guide ring. The space of one side, opposite to the first air passing area, of the machine head assembly and the heat exchanger in the shell can be set to be larger, the air guide ring does not occupy the space in a large range, the compressor and the electric control box can be arranged in the space, position interference between the compressor and the air guide ring and position interference between the air guide ring and the electric control box are avoided, and the service life of the air guide ring is prolonged. Therefore, the compressor and the electric control box cannot shield the air inlet side of the heat exchanger, the heat exchange efficiency of the heat exchanger is higher, and the performance of the machine head assembly is better.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of heat pump equipment technology, specifically to a heat pump water heater and its head assembly. Background Technology

[0002] A type of heat pump water heater, such as Figures 1 to 4 As shown, its head assembly includes a housing 10, a direct-flow heat exchanger 20, a fan assembly 30, a compressor 40, and an electrical control box. The heat exchanger 20 is erected on the bottom wall of the housing 10 and divides the interior of the housing 10 into an air inlet chamber 11 and an air outlet chamber 12. The compressor 40 and the electrical control box are located on the bottom wall of the air inlet chamber 11. The fan assembly 30 includes a motor, a centrifugal impeller, and a volute. The volute is located on the bottom wall of the air outlet chamber 12, and the centrifugal impeller is located inside the volute and connected to the motor. The air outlet 14 of the head assembly is located on the top wall of the housing 10, and the air inlet 13 of the head assembly is located on the top wall of the housing 10 (e.g., ...). Figure 1 and Figure 2 (as shown) or the peripheral wall of the housing 10 (such as Figure 3 and Figure 4 As shown, the inlet of the volute is opposite to the heat exchanger 20, and the outlet of the volute is connected to the air outlet 14. The motor drives the centrifugal impeller to rotate, and an air stream is formed inside the casing 10, flowing from the air inlet 13 through the air inlet chamber 11, the heat exchanger 20 and the volute to the air outlet 14.

[0003] Because the volute is located on the bottom wall of the air outlet cavity 12 and almost completely occupies the bottom wall of the air outlet cavity 12, the compressor 40 and the electrical control box cannot be located on the bottom wall of the air outlet cavity 12 and can only be located on the bottom wall of the air inlet cavity 11. As a result, the compressor 40 and the electrical control box significantly obstruct the air inlet side of the heat exchanger 20, which will reduce the heat exchange efficiency of the heat exchanger 20 and cause a decline in the performance of the heat pump water heater. Utility Model Content

[0004] This application provides a heat pump water heater head assembly, including: a housing with a first air vent on its top wall and a second air vent on its peripheral wall; a heat exchanger located inside the housing and disposed at the second air vent, with a first air passage zone formed between the heat exchanger and the second air vent; an air guide ring located inside the housing, with its upper end covering the first air vent and its lower end located on the side of the heat exchanger opposite to the first air passage zone, the upper part of the first air passage zone sealingly engaging with the outer peripheral surface of the air guide ring; and a fan assembly disposed inside the air guide ring, configured to form an airflow from the second air vent sequentially through the first air passage zone, the heat exchanger, and the air guide ring to the first air vent.

[0005] In some exemplary embodiments, the heat exchanger has a bent structure, with the protruding side of the heat exchanger facing the second air outlet, and the lower end of the air guide ring located on the recessed side of the heat exchanger.

[0006] In some exemplary embodiments, the outer peripheral surface of the air guide ring is sealed to the peripheral wall of the housing, the upper end of the heat exchanger is sealed to the outer peripheral surface of the air guide ring, the lower end of the heat exchanger is sealed to the bottom wall of the housing, the two ends of the heat exchanger located circumferentially to the housing are sealed to the peripheral wall of the housing, and the protruding side of the heat exchanger, the housing and the air guide ring together form the first air passage zone.

[0007] In some exemplary embodiments, the fan assembly includes a motor and a centrifugal impeller, the centrifugal impeller being located below the motor and mounted on the motor's rotating shaft.

[0008] In some exemplary embodiments, the air guide ring includes an expansion section whose inner diameter gradually increases from bottom to top, with the air inlet side of the fan assembly facing downwards and the air outlet side facing the inner circumferential surface of the expansion section.

[0009] In some exemplary embodiments, the air guide ring further includes: an air outlet section located above and connected to the expansion section; and an air inlet section located below and connected to the expansion section.

[0010] In some exemplary embodiments, the air outlet section is in the shape of a cylindrical ring, and the air inlet section is provided with an air guide structure. The air guide structure is located below the fan assembly and is configured to guide the air stream from the lower end of the air guide ring into the air guide ring.

[0011] In some exemplary embodiments, the head assembly further includes a support member disposed within the housing and supported between the bottom wall of the housing and the air guide ring.

[0012] In some exemplary embodiments, the compressor head assembly further includes: a horizontal compressor located on the side of the heat exchanger away from the second air outlet and disposed on the bottom wall of the housing below the air guide ring; and an electrical control box located inside the housing and on the side of the horizontal compressor away from the heat exchanger.

[0013] This application also provides a heat pump water heater, including the head assembly of the heat pump water heater described in any of the above embodiments.

[0014] The technical solution provided in this application embodiment allows for a larger space on the side of the heat exchanger inside the casing facing away from the first air passage zone, and the air guide ring does not occupy a large area of ​​this space. This allows the compressor and electrical control box to be placed within this space without interfering with the position of the air guide ring. As a result, the compressor and electrical control box do not obstruct the air inlet side of the heat exchanger. Therefore, this solution results in higher heat exchange efficiency for the heat exchanger and better performance for the head assembly. Moreover, the structure of the head assembly in this solution is also simpler.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0017] Figure 1 An exploded view of the nose assembly provided for some embodiments of the related technology;

[0018] Figure 2 for Figure 1 A cross-sectional view of the nose assembly shown.

[0019] Figure 3 An exploded view of the nose assembly provided for other embodiments of the related technology;

[0020] Figure 4 for Figure 3 A cross-sectional view of the nose assembly shown.

[0021] Figure 5 This is an exploded structural diagram of a head unit assembly provided in some embodiments of this application; the electrical control box is not shown.

[0022] Figure 6 for Figure 5 The diagram shows a partial exploded view of the head assembly; the annular peripheral wall and the electrical control box are not shown.

[0023] Figure 7 for Figure 5 The diagram shows a cross-sectional view of the head assembly, with the electrical control box located inside the housing.

[0024] Figure 8 for Figure 6 The diagram shows a cross-sectional view of the nose assembly.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 10 Housing, 11 Air inlet cavity, 12 Air outlet cavity, 13 Air inlet, 14 Air outlet, 20 Heat exchanger, 30 Fan assembly, 40 Compressor;

[0027] 100 Shell, 110 Water tray, 120 Annular circumferential wall, 121 Second air outlet, 130 Cover, 131 First air outlet, 140 First air passage zone, 150 Second air passage zone, 200 Heat exchanger, 300 Air guide ring, 310 Expansion section, 320 Air outlet section, 330 Air inlet section, 331 Air guide structure, 340 Arc-shaped boss, 400 Fan assembly, 410 Motor, 420 Motor bracket, 430 Centrifugal impeller, 500 Horizontal compressor, 600 Support component, 700 Electrical control box. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0029] The heat pump water heater head assembly provided in this application embodiment, such as... Figures 5 to 8 As shown, it includes: a shell 100, with a first air vent 131 on the top wall and a second air vent 121 on the peripheral wall of the shell 100; a heat exchanger 200, located inside the shell 100 and positioned at the second air vent 121, with a first air passage zone 140 formed between the heat exchanger 200 and the second air vent 121, and a second air passage zone 150 formed on the side of the heat exchanger 200 inside the shell 100 facing away from the first air passage zone 140; and an air guide ring 300. The air guide ring 300 is located inside the housing 100, with its upper end covering the first air outlet 131 and its lower end located on the side of the heat exchanger 200 facing away from the first air passage zone 140; and the fan assembly 400, which is located inside the air guide ring 300 and is configured to form an airflow from the second air outlet 121 through the first air passage zone 140, the heat exchanger 200, the second air passage zone 150 and the air guide ring 300 to the first air outlet 131.

[0030] In this head assembly, the second air passage zone 150 can be set larger (e.g., the heat exchanger 200 can be set as a U-shaped, C-shaped, or V-shaped heat exchanger, with the protruding side of the heat exchanger 200 facing the second air outlet 121). Moreover, (compared to the volute) the air guide ring 300 will not occupy a large area of ​​the space in the second air passage zone 150, which can satisfy the requirement to place the compressor and the electrical control box within the second air passage zone 150, while avoiding positional interference between the compressor, the electrical control box, and the air guide ring 300. In this way, the compressor and the electrical control box will not block the air inlet side of the heat exchanger 200. Therefore, the heat exchange efficiency of the heat exchanger 200 is higher in this solution, and the performance of the head assembly is better. In addition, the structure of the head assembly in this solution is also simpler.

[0031] In some examples, such as Figures 5 to 8 As shown, the heat exchanger 200 has a bent structure, with its convex side facing the second air outlet 121 and the lower end of the air guide ring 300 located on the concave side of the heat exchanger 200. This results in a larger heat exchange area and better heat exchange effect for the heat exchanger 200. Furthermore, the second air passage zone 150 occupies a larger proportion of the space within the casing 100, which is more conducive to arranging the compressor and electrical control box in the second air passage zone 150. The heat exchanger 200 can be configured as a U-shaped, C-shaped, or V-shaped heat exchanger.

[0032] In some examples, such as Figure 5 , Figure 7 and Figure 8 As shown, the outer circumferential surface of the air guide ring 300 is sealed to the peripheral wall of the shell 100, the upper end of the heat exchanger 200 is sealed to the outer circumferential surface of the air guide ring 300, the lower end of the heat exchanger 200 is sealed to the bottom wall of the shell 100, and the two ends of the heat exchanger 200 located circumferentially to the shell 100 are sealed to the peripheral wall of the shell 100. This achieves a first air passage zone 140 formed by the convex side of the heat exchanger 200, the shell 100, and the air guide ring 300. The upper end of the first air passage zone 140 is sealed by the air guide ring 300 and the peripheral wall of the shell 100. The second air passage zone 150 formed by the concave side of the heat exchanger 200, the shell 100, and the air guide ring 300. In this design, all the airflow within the first air passage zone 140 flows through the fin gaps of the heat exchanger 200 to the second air passage zone 150, resulting in higher heat exchange efficiency and better heat exchange effect for the heat exchanger 200. Alternatively, an arc-shaped boss 340 may be provided on the upper part of the outer peripheral surface of the air guide ring 300. The arc-shaped boss 340 is located above the second air outlet 121. The platform of the arc-shaped boss 340 is sealed to the upper part of the peripheral wall of the shell 100, and the upper end of the heat exchanger 200 is sealed to the lower end face of the arc-shaped boss 340.

[0033] The upper end of the heat exchanger 200 is sealed to the outer circumferential surface of the air guide ring 300: this can be achieved by sealing the upper end of the heat exchanger 200 with a sealing sponge; or the gap between the upper end of the heat exchanger 200 and the outer circumferential surface of the air guide ring 300 can be set to no more than 3mm, and the two are sealed by fitting with a small gap. All of the above can achieve the purpose of this application, and their purpose has not departed from the design concept of this utility model. They will not be elaborated here, and all should fall within the protection scope of this application.

[0034] In some examples, such as Figures 5 to 8 As shown, the fan assembly 400 includes a motor 410, a motor bracket 420, and a centrifugal impeller 430. The motor 410 is fixed inside the air guide ring 300 by the motor bracket 420. The centrifugal impeller 430 is located inside the air guide ring 300 and is mounted on the rotating shaft of the motor 410 below the motor 410. The air inlet side of the centrifugal impeller 430 faces downward, and the air outlet side of the centrifugal impeller 430 faces the peripheral wall of the air guide ring 300.

[0035] In some embodiments, such as Figure 7 As shown, the air guide ring 300 includes an expansion section 310, the inner diameter of which gradually increases from bottom to top. The air inlet side of the centrifugal impeller 430 faces downward, and the air outlet side of the centrifugal impeller 430 faces the inner circumferential surface of the expansion section 310. The centrifugal impeller 430 blows an air stream toward the inner circumferential surface of the expansion section 310. The inner circumferential surface of the expansion section 310 guides the air stream to change direction, so that the air stream changes from being blown horizontally to being blown obliquely upward along the inner circumferential surface of the expansion section 310 and flows toward the first air outlet 131. The air stream is then blown from the first air outlet 131 toward the outside of the housing 100.

[0036] In some embodiments, such as Figure 7 As shown, the air guide ring 300 further includes: an air outlet section 320, located above the expansion section 310, with its lower end connected to the upper end of the expansion section 310, and its upper end covering the first air inlet 131; and an air inlet section 330, located below the expansion section 310, with its upper end connected to the lower end of the expansion section 310. The motor 410 drives the centrifugal impeller 430 to rotate, forming an airflow within the air guide ring 300 that flows sequentially from the lower end of the air inlet section 330 through the expansion section 310 and the air outlet section 320 towards the first air inlet 131. The airflow then blows from the first air inlet 131 towards the outside of the housing 100.

[0037] In some embodiments, such as Figure 7As shown, the air outlet section 320 is cylindrical and ring-shaped, and the air inlet section 330 is provided with an air guide structure 331. The air guide structure 331 is located below the fan assembly 400 and is configured to guide the airflow from the lower end of the air guide ring 300 into the air guide ring 300. Alternatively, the air guide structure 331 can be configured as a full-circle arc-shaped edge extending upward from the lower end of the air inlet section 330 on the inner side of the air inlet section 330. This full-circle arc-shaped edge can better guide the airflow from the lower end of the air guide ring 300 into the air guide ring 300.

[0038] In some embodiments, such as Figure 5 and Figure 6 As shown, the head assembly also includes a support member 600, which is disposed within the housing 100 and supported between the bottom wall of the housing 100 and the air guide ring 300. Alternatively, the support member 600 may have a first screw hole at its upper end, and the air guide ring 300 may have a second screw hole. A first screw connects the first and second screw holes, thereby detachably fixing the upper end of the support member 600 to the air guide ring 300. Or, the support member 600 may have a buckle at its upper end, and the air guide ring 300 may have a locking hole. The buckle engages with the locking hole, thereby detachably fixing the upper end of the support member 600 to the air guide ring 300. All of the above methods can achieve the purpose of this application, and their intent does not depart from the design concept of this utility model. They will not be elaborated further here, and should all fall within the protection scope of this application.

[0039] In some embodiments, such as Figure 5 and Figure 6 As shown, the support member 600 includes multiple members, which are circumferentially spaced apart from each other in the housing 100. The multiple support members 600 may be two, three, or four, etc.; all of these can achieve the purpose of this application, and their intent does not depart from the design concept of this utility model, and will not be elaborated further here, but should all fall within the protection scope of this application.

[0040] In one embodiment, such as Figure 5 and Figure 6 As shown, the two support members 600 correspond one-to-one with the two ends of the heat exchanger 200 located circumferentially on the shell 100. Sealing sponges are provided between the corresponding support members 600 and the ends of the heat exchanger 200 for sealing. The support members 600 are sealed to the circumferential wall of the shell 100. The protruding side of the heat exchanger 200, the two support members 600 corresponding to the two ends of the heat exchanger 200, the shell 100, and the air guide ring 300 together form the first air passage zone 140. The recessed side of the heat exchanger 200, the two support members 600 corresponding to the two ends of the heat exchanger 200, the shell 100, and the air guide ring 300 together form the second air passage zone 150.

[0041] In some examples, such as Figures 5 to 8As shown, the head assembly also includes a horizontal compressor 500. The horizontal compressor 500 is located on the bottom wall of the housing 100, which is on the side of the heat exchanger 200 facing away from the second air outlet 121 and below the air guide ring 300. The horizontal compressor 500 has a small height, which satisfies the requirement that it is located below the air guide ring 300 in the second air passage zone 150 and will not interfere with the position of the air guide ring 300.

[0042] In some embodiments, such as Figure 7 As shown, the compressor head assembly also includes an electrical control box 700, which is located inside the housing 100 and erected on the side of the horizontal compressor 500 facing away from the heat exchanger 200. At the same time, the electrical control box 700 is also located on the side of the lower end of the air guide ring 300 facing away from the heat exchanger 200. In this scheme, there is no positional interference between the electrical control box 700, the horizontal compressor 500 and the air guide ring 300.

[0043] In some examples, such as Figure 5 and Figure 7 As shown, the housing 100 includes a water receiving tray 110, an annular peripheral wall 120, and a cover 130. The annular peripheral wall 120 is disposed on the water receiving tray 110, and the cover 130 is fitted over the upper part of the annular peripheral wall 120. The water receiving tray 110 includes the bottom wall of the housing 100, the cover 130 includes the top wall of the housing 100, a first air vent 131 is located on the cover 130, the annular peripheral wall 120 includes the peripheral wall of the housing 100, and a second air vent 121 is located on the annular peripheral wall 120.

[0044] When the motor 410 malfunctions, first remove the cover 130 (or both the cover 130 and the annular circumferential wall 120 can be removed), then remove the motor 410, motor bracket 420 and centrifugal impeller 430 located in the air guide ring 300 together from the upper opening of the air guide ring 300, so that the motor 410 can be repaired or replaced.

[0045] When a component fixed to the water receiving tray 110 inside the housing 100 malfunctions, first remove the cover 130 (or both the cover 130 and the annular peripheral wall 120 can be removed), then disassemble the air guide ring 300, motor 410, motor bracket 420 and centrifugal impeller 430 together, so that the malfunctioning component fixed to the water receiving tray 110 can be repaired or replaced.

[0046] The heat pump water heater provided in this application embodiment (not shown in the figure) includes the head assembly of the heat pump water heater described in any of the above embodiments.

[0047] This heat pump water heater possesses all the advantages of the head assembly of the heat pump water heater provided in any of the above embodiments, which will not be repeated here.

[0048] In summary, for the technical solution provided by the embodiments of the present application, the space on the side of the heat exchanger in the housing facing away from the first air passage area can be set larger, and the air guide ring does not occupy this space extensively. It can meet the requirements of arranging the compressor and the electronic control box in this space and avoiding position interference with the air guide ring. In this way, the compressor and the electronic control box do not block the air inlet side of the heat exchanger. Therefore, the heat exchange efficiency of the heat exchanger in this solution is higher, and the performance of the head assembly is better. Moreover, the structure of the head assembly in this solution is also simpler.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "perimeter", "the structure of the character 'kou'" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0050] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] Although the disclosed embodiments of the present utility model are as above, the content described is only the embodiments adopted for the convenience of understanding the present utility model, and is not used to limit the present utility model. Any person skilled in the art within the scope of the present utility model can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present utility model. However, the scope of patent protection of the present utility model shall still be defined by the appended claims.

Claims

1. A heat pump water heater head assembly, characterized in that, include: The casing has a first air vent on its top wall and a second air vent on its peripheral wall; A heat exchanger is located inside the housing and disposed at the second air outlet, and a first air passage zone is formed between the heat exchanger and the second air outlet; An air guide ring, located inside the housing, has its upper end covering the first air inlet and its lower end located on the side of the heat exchanger opposite to the first air passage area. The upper part of the first air passage area is sealed to the outer circumferential surface of the air guide ring. A fan assembly is disposed within the air guide ring and configured to form an airflow that flows from the second air outlet through the first air passage zone, the heat exchanger, and the air guide ring toward the first air outlet.

2. The head assembly according to claim 1, characterized in that, The heat exchanger has a bent structure, with the convex side of the heat exchanger facing the second air outlet, and the lower end of the air guide ring located on the concave side of the heat exchanger.

3. The head assembly according to claim 1, characterized in that, The outer circumferential surface of the air guide ring is sealed to the circumferential wall of the shell, the upper end of the heat exchanger is sealed to the outer circumferential surface of the air guide ring, the lower end of the heat exchanger is sealed to the bottom wall of the shell, the two ends of the heat exchanger located in the circumferential direction of the shell are sealed to the circumferential wall of the shell, and the protruding side of the heat exchanger, the shell and the air guide ring together form the first air passage zone.

4. The head assembly according to claim 1, characterized in that, The fan assembly includes a motor and a centrifugal impeller, the centrifugal impeller being located below the motor and mounted on the motor's rotating shaft.

5. The head assembly according to any one of claims 1 to 4, characterized in that, The air guide ring includes: The expansion section has an inner diameter that gradually increases from bottom to top. The air inlet side of the fan assembly faces downward and the air outlet side faces the inner circumferential surface of the expansion section.

6. The head assembly according to claim 5, characterized in that, The air guide ring also includes: The air outlet section is located above and connected to the expansion section; and The air inlet section is located below the expansion section and is connected to the expansion section.

7. The head assembly according to claim 6, characterized in that, The air outlet section is in the shape of a cylindrical ring, and the air inlet section is provided with an air guide structure. The air guide structure is located below the fan assembly and is configured to guide the air stream from the lower end of the air guide ring into the air guide ring.

8. The head assembly according to any one of claims 1 to 4, characterized in that, Also includes: A support member is disposed inside the housing and supported between the bottom wall of the housing and the air guide ring.

9. The head assembly according to any one of claims 1 to 4, characterized in that, Also includes: A horizontal compressor is located on the side of the heat exchanger facing away from the second air outlet and on the bottom wall of the housing below the air guide ring; and The electrical control box is located inside the housing and on the side of the horizontal compressor facing away from the heat exchanger.

10. A heat pump water heater, characterized in that, Includes the head assembly of a heat pump water heater as described in any one of claims 1 to 9.

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