Condenser assembly and heat pump water heater

Abstract

The utility model relates to the field of water heaters, and provides a condenser assembly and a heat pump water heater, the condenser assembly comprises a first collecting pipe, a second collecting pipe and a plurality of groups of micro-channels, and the second collecting pipe and the first collecting pipe are opposite and arranged at intervals; the multiple groups of micro-channels are communicated between the first collecting pipe and the second collecting pipe, and the micro-channels are communicated with the first collecting pipe and the second collecting pipe; at least one of the first collecting pipe and the second collecting pipe is provided with an arc-shaped face attached to the outer wall face of the inner container. The side, attached to the outer wall face of the inner container, of at least one of the first collecting pipe and the second collecting pipe is arranged to be the arc-shaped face, and the contact area between the first collecting pipe or the second collecting pipe and the inner container can be effectively increased through attachment between the arc-shaped face and the inner container; therefore, the heat conduction efficiency between the first collecting pipe or the second collecting pipe and the inner container is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a condenser assembly and a heat pump water heater. Background Art

[0002] Heat pump water heaters make full use of the heat energy in the air and have obvious advantages in energy saving and environmental protection. They have become a new generation of hot water production equipment after boilers, electric water heaters, gas water heaters and solar water heaters. Traditional heat pump water heaters are composed of compressors, evaporators, throttle valves, condensers, water tanks, connecting pipes and control systems. Most of the condensers use round copper tubes. One is to spirally coil the copper tubes on the outside of the water tank, and the other is to build the spiral winding tubes into the water tank. The water in the water tank continuously absorbs the condensation heat released by the refrigerant in the copper tubes, and finally reaches the set temperature.

[0003] However, the contact area between the existing condenser and the inner tank is limited, resulting in poor heat exchange effect. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the related art. To this end, the utility model proposes a condenser assembly to improve the heat conduction efficiency between the first header or the second header and the inner tank, thereby increasing the contact area between the condenser assembly and the inner tank to improve the heat exchange efficiency between the two, thereby increasing the heating amount of the inner tank and improving the heating efficiency.

[0005] The utility model also provides a heat pump water heater.

[0006] According to the utility model, the condenser assembly comprises:

[0007] The first header,

[0008] a second current collecting pipe, the second current collecting pipe is opposite to the first current collecting pipe and is spaced apart from the first current collecting pipe;

[0009] A plurality of groups of microchannels, wherein the plurality of groups of microchannels are connected between the first header and the second header, and the microchannels are connected between the first header and the second header;

[0010] Wherein, at least one of the first collecting pipe and the second collecting pipe has an arc-shaped surface which is mutually attached to the outer wall surface of the inner container.

[0011] According to an embodiment of the utility model, the first collecting pipe and the second collecting pipe are extended along the length direction of the inner tank, the arc surface is extended along the length direction of the first collecting pipe or the second collecting pipe, and the arc surface is bent toward the axial direction of the inner tank.

[0012] According to an embodiment of the present invention, the curvature of the arc-shaped surface is the same as the curvature of the outer wall surface of the inner container.

[0013] According to an embodiment of the present invention, the cross-sectional shape of the first collecting pipe or the second collecting pipe is triangular, elliptical, rectangular, semicircular or circular.

[0014] According to an embodiment of the present invention, the width of the first header or the second header along the outer circumferential direction of the inner tank is less than or equal to 15 mm and greater than or equal to 10 mm.

[0015] According to an embodiment of the present invention, a plurality of communication ports are provided on the sides of the first current collecting pipe and the second current collecting pipe which are away from each other, and the microchannel is connected with the first current collecting pipe and the second current collecting pipe through the communication ports.

[0016] According to an embodiment of the present invention, a plurality of the communication openings are arranged at intervals along the outer periphery of the arc-shaped surface.

[0017] According to an embodiment of the utility model, the condenser further includes a refrigerant inlet pipe and a refrigerant outlet pipe, the multiple groups of microchannels are an even number of groups, and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the second header.

[0018] According to an embodiment of the present invention, the number of groups of the microchannels is greater than or equal to four, and the groups of microchannels decrease step by step along the flow direction of the refrigerant.

[0019] The utility model also proposes a heat pump water heater, which includes a condenser assembly as described above, wherein the condenser assembly includes a first header, a second header and a plurality of groups of microchannels, wherein the second header is opposite to the first header and is arranged at intervals; the plurality of groups of microchannels are connected between the first header and the second header, and the microchannels connect the first header and the second header; wherein at least one of the first header and the second header has an arc-shaped surface that is mutually in contact with the outer wall surface of the inner tank.

[0020] The above one or more technical solutions in the embodiments of the utility model have at least one of the following technical effects:

[0021] In the present application, at least one of the first collecting tube and the second collecting tube, which is in contact with the outer wall of the inner tank, is configured as an arc-shaped surface. The contact area between the first collecting tube or the second collecting tube and the inner tank can be effectively increased by the contact between the arc-shaped surface and the inner tank, thereby improving the heat conduction efficiency between the first collecting tube or the second collecting tube and the inner tank, thereby increasing the contact area between the condenser assembly and the inner tank to improve the heat exchange efficiency between the two, thereby increasing the heating amount of the inner tank and improving the heating efficiency.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a heat pump water heater provided by the utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of a heat pump water heater without the outer shell;

[0026] Figure 3 yes Figure 2 Schematic diagram of the coordination between the middle liner and the condenser assembly;

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0028] Reference numerals:

[0029] 10. Heat pump water heater;

[0030] 100. Condenser assembly;

[0031] 110, first header; 111, first arc-shaped surface; 120, second header; 121, second arc-shaped surface; 130, microchannel; 140, refrigerant inlet pipe; 150, refrigerant outlet pipe;

[0032] 200, liner;

[0033] 300, housing;

[0034] 400. Machine head assembly. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0036] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Heat pump water heaters make full use of the heat energy in the air and have obvious advantages in energy saving and environmental protection. They have become a new generation of hot water production equipment after boilers, electric water heaters, gas water heaters and solar water heaters. Traditional heat pump water heaters are composed of compressors, evaporators, throttle valves, condensers, water tanks, connecting pipes and control systems. Most of the condensers use round copper tubes. One is to spirally coil the copper tubes on the outside of the water tank, and the other is to build the spiral winding tubes into the water tank. The water in the water tank continuously absorbs the condensation heat released by the refrigerant in the copper tubes, and finally reaches the set temperature.

[0041] However, the contact area between the existing condenser and the inner tank is limited, resulting in poor heat exchange effect.

[0042] The utility model provides a condenser component and a heat pump water heater.

[0043] In the utility model embodiment, refer to Figures 1 to 3 The condenser assembly 100 includes a first header 110, a second header 120 and a plurality of microchannels 130, wherein the second header 120 is opposite to the first header 110 and is spaced apart; the plurality of microchannels 130 are connected between the first header 110 and the second header 120, and the microchannels 130 are connected between the first header 110 and the second header 120; wherein at least one of the first header 110 and the second header 120 has an arcuate surface that is mutually adhered to the outer wall surface of the inner tank 200.

[0044] The first manifold 110 and the second manifold 120 provide connection and support for the microchannel 130. The first manifold 110 and the second manifold 120 are arranged relative to each other, which can better guide the flow of the refrigerant, and facilitate the increase of the flow path of the refrigerant in the microchannel 130, and increase the contact area. It can be understood that the arrangement of the first manifold 110 and the second manifold 120 is the key to realizing the stacking and winding of multiple groups of microchannels 130. Through the arrangement of the first manifold 110 and the second manifold 120, the refrigerant can be sequentially circulated in multiple groups of microchannels 130, so that the flow path of the refrigerant can be extended by adding multiple groups of microchannels 130 as needed, thereby increasing the contact area between the condenser and the inner tank 200. At the same time, the second manifold 120 is arranged relative to the first manifold 110 and at intervals, so that other mechanisms of the heat pump water heater 10 can be avoided. The arcuate surface corresponding to the first header 110 is called the first arcuate surface 111 , and the arcuate surface corresponding to the second header 120 is called the second arcuate surface 121 .

[0045] The plurality of microchannels 130 are connected between the first header 110 and the second header 120, increasing the heat exchange area between the refrigerant and the external environment. In other embodiments, the heat exchange efficiency can be further optimized by changing the shape, size and material of the microchannels 130.

[0046] In the present application, at least one of the first collecting tube 110 and the second collecting tube 120 is configured to have a side that is in contact with the outer wall of the inner tank 200 as an arc-shaped surface. The contact area between the first collecting tube 110 or the second collecting tube 120 and the inner tank 200 can be effectively increased by contacting the inner tank 200, thereby improving the heat conduction efficiency between the first collecting tube 110 or the second collecting tube 120 and the inner tank 200, thereby increasing the contact area between the condenser assembly 100 and the inner tank 200 to improve the heat exchange efficiency between the two, thereby increasing the heating amount of the inner tank 200 and improving the heating efficiency.

[0047] Reference Figures 2 to 4 According to an embodiment of the utility model, the first manifold 110 and the second manifold 120 are extended along the length direction of the inner tank 200, and the arc surface is extended along the length direction of the first manifold 110 or the second manifold 120, and the arc surface is bent toward the axial direction of the inner tank 200. It can be understood that the first manifold 110 and the second manifold 120 are extended along the length direction of the inner tank 200 so that the condenser assembly 100 can better adapt to the demand of fluid flow in the length direction of the inner tank 200. The hierarchical distribution of cold water and hot water in the inner tank 200 is met. The arc surface is extended along the length direction of the first manifold 110 or the second manifold 120 to increase the contact area of ​​the entire first manifold 110 and the second manifold 120, while reducing the restriction of the arc surface on the refrigerant flow in the manifold. The arc surface is recessed toward the side away from the inner liner 200 , so that the first header 110 and the second header 120 can increase the contact area with the inner liner 200 through the arc surface, thereby improving the heat exchange efficiency.

[0048] Reference Figure 4 According to an embodiment of the utility model, the curvature of the curved surface is the same as the curvature of the outer wall surface of the liner 200. It is understandable that the liner 200 is usually arranged in a cylindrical shape, and its outer wall surface has a certain curvature. The curvature of the curved surface in this embodiment is the same as the curvature of the outer wall surface of the liner 200, so that the shape of the curved surface matches the outer wall surface of the liner 200, and a consistent radius of curvature is maintained. Due to the consistent curvature, a closer fit can be achieved between the curved surface and the outer wall surface of the liner 200, reducing possible gaps and heat conduction resistance. Curvature matching can ensure that the contact area between the curved surface and the outer wall surface of the liner 200 is maximized. In this way, heat can be more effectively transferred from the fluid to the curved surface, and the heat exchange efficiency can be further improved. At the same time, due to the consistent curvature, the heat transfer path is more uniform and continuous, which helps to improve the heat transfer efficiency.

[0049] In one embodiment of the utility model, the cross-sectional shape of the first manifold 110 or the second manifold 120 is triangular, elliptical, rectangular, semicircular or circular. It is understandable that when the cross-sectional shape of the first manifold 110 or the second manifold 120 is triangular, rectangular or semicircular, a larger contact surface area with the inner liner 200 can be provided to promote more efficient heat exchange. When the cross-sectional shape of the first manifold 110 or the second manifold 120 is elliptical or circular, the resistance of the refrigerant during flow can be reduced, making it easier for the refrigerant to pass through the manifold, thereby improving the fluidity and heat exchange efficiency of the refrigerant. Of course, in other embodiments, the first manifold 110 and the second manifold 120 can also be other shapes, which are not specifically limited here and can be set as needed.

[0050] According to one embodiment of the utility model, the width of the first header 110 or the second header 120 along the outer circumferential direction of the inner tank 200 is less than or equal to 15mm, and greater than or equal to 10mm. It is understandable that, when the area of ​​the outer wall of the inner tank 200 is constant, reducing the diameter of the first header 110 and the second header 120 or the maximum width along the outer circumferential direction of the inner tank 200 can relatively increase the setting length of the microchannel 130, thereby increasing the heat exchange area between the microchannel 130 and the inner tank 200, and then improving the heat exchange efficiency of the condenser assembly 100. However, a header with too small a diameter will affect the flow rate of the refrigerant. Optionally, the diameter of the first header 110 and the second header 120 can be 10mm, 11mm, 12mm, 13mm, 14mm or 15mm, etc., which can be selected according to specific installation requirements and flow requirements, and is not specifically limited here.

[0051] According to one embodiment of the utility model, a plurality of communication ports are provided on the side of the first manifold 110 and the second manifold 120 which are away from each other, and the microchannel 130 is connected with the first manifold 110 and the second manifold 120 through the communication ports. It can be understood that by providing a plurality of communication ports on the side of the first manifold 110 and the second manifold 120 which are away from each other, and connecting the microchannel 130 with the first manifold 110 and the second manifold 120 through these communication ports, the inlet and outlet of the refrigerant is realized, and the heat generation of the flow path is optimized. It is convenient to arrange multiple groups of microchannels 130 side by side.

[0052] Reference Figure 4 Furthermore, the plurality of communication ports are arranged at intervals along the outer periphery of the arc surface. In this way, by arranging the communication ports at intervals along the outer periphery of the arc surface, the end portions of the microchannels 130 near the first header 110 and the second header 120 can be closer to the outer wall surface of the inner liner 200, thereby improving the heat exchange efficiency with the inner liner 200.

[0053] Reference Figure 2According to an embodiment of the utility model, the condenser further includes a refrigerant inlet pipe 140 and a refrigerant outlet pipe 150, the multiple groups of microchannels 130 are an even number group, and the refrigerant inlet pipe 140 and the refrigerant outlet pipe 150 are both connected to the second header 120. It can be understood that in the present application, the flow direction of the microchannels 130 of the same group is consistent, and the multiple groups of microchannels 130 are stacked along the refrigerant flow direction. Therefore, when the multiple groups of microchannels 130 are an even number, the refrigerant inlet pipe 140 and the refrigerant outlet pipe 150 are connected to the first header 110 or the second header 120 together. In this way, by matching the layout of the refrigerant inlet pipe 140 and the refrigerant outlet pipe 150 with the microchannel 130, the flow of the refrigerant and the heat exchange process can be effectively optimized, and the efficiency and performance of the condenser can be improved.

[0054] In one embodiment of the utility model, the number of groups of microchannels 130 is greater than or equal to four groups, and the multiple groups of microchannels 130 decrease step by step along the circulation direction of the refrigerant. It is understandable that the multiple groups of microchannels 130 may include four groups, five groups, six groups, seven groups or eight groups, etc., without special limitation. This embodiment is described with the number of groups of microchannels 130 as four groups, and other embodiments can be implemented with reference to this embodiment. The four groups of microchannels 130 decrease step by step along the circulation direction of the refrigerant, so that the uniformity of the refrigerant is better, the trend is smoother, and it is conducive to the exchange of heat. When the refrigerant flows through the first group of microchannels 130, since the refrigerant is in a gaseous state and has a higher temperature, a large number of channels are required so that the refrigerant can be in large-area contact with the inner liner 200 for heat exchange. Then, as the refrigerant continues to flow through the second, third and fourth groups of microchannels 130, the gaseous refrigerant is transformed into liquid refrigerant after continuous heat exchange. At this time, the volume of the refrigerant decreases and the pressure decreases. Correspondingly, the number of channels in each group of microchannels 130 is gradually reduced, so that the impact of flow changes on the microchannels 130 can be better controlled under the same total number of microchannels 130, and the distribution of the refrigerant in the microchannels 130 is optimized. In addition, due to the step-by-step decreasing setting of the microchannels 130, the flow area of ​​the refrigerant gradually decreases when it flows through different microchannels 130, which helps to better utilize the flow area and improve the heat exchange efficiency. At the same time, this setting can also avoid the problem of the effectiveness of the total flow area due to uneven distribution along the flow path.

[0055] The utility model also provides a heat pump water heater 10, which includes an inner tank 200, an outer shell 300, a head assembly 400 and the above-mentioned condenser assembly 100, wherein the specific structure of the condenser assembly 100 refers to the above-mentioned embodiment; it can be understood that since the above-mentioned condenser assembly 100 is used in the heat pump water heater 10, the embodiment of the heat pump water heater 10 includes all technical solutions of all embodiments of the above-mentioned condenser assembly 100, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0056] Specifically, in the embodiment of the utility model, the heat pump water heater 10 includes a head assembly 400, an inner tank 200, an outer shell 300, an end cover, a heating assembly, a wall-mounted assembly and a heat pump system, etc. The outer shell 300 has a cavity and an opening inside, and the end cover is closed at the opening. The inner tank 200 and the heat pump system are both located in the outer shell 300. The inner tank 200 is used to hold water and is made of a heat-conducting material. The heat pump system is used to heat the water in the inner tank 200, and the outer shell 300 plays a protective role for the inner tank 200 and the heat pump system. The inner tank 200 can be an integrally formed setting, or an end cover can be provided at one end, or it can include a tank body and end covers provided at both ends of the tank body. The heating assembly is used to assist in heating and increase the temperature of hot water. In some cases, when the ambient heat absorbed by the heat pump water heater 10 is not enough to raise the water temperature to the required temperature, it is necessary to start a separately provided heating assembly to assist in heating. This ensures that hot water with sufficient heat can be provided in any case to meet the needs of users. In addition, a separately arranged heating component can also improve the stability and control accuracy of the hot water temperature. By accurately controlling the output power and time of the heating component, the hot water temperature can be adjusted more accurately to avoid overheating or insufficient temperature. The heat pump system may include a condenser component 100 and a heat pump host mainly composed of a compressor, a throttling device and an evaporator. Specifically, the compressor has an exhaust port and an air return port, the air outlet of the evaporator is connected to the air return port of the compressor, the exhaust port of the compressor is connected to the refrigerant inlet of the condenser component 100 through the refrigerant inlet pipe 140, the refrigerant outlet of the condenser component 100 is connected to the air inlet of the evaporator through the refrigerant outlet pipe 150, and the throttling device is arranged between the condenser and the evaporator. When the heat pump water heater 10 is running, the refrigerant in the evaporator absorbs the heat of the surrounding air and then heats up and vaporizes. The heated and vaporized refrigerant enters the compressor and becomes a high-temperature and high-pressure gas under the action of the compressor. It is then transported to the pipeline of the condenser assembly 100 through the refrigerant inlet pipe 140. The high-temperature and high-pressure gaseous refrigerant directly or indirectly exchanges heat with the water in the inner tank 200 in the condenser assembly 100, so that the temperature of the water in the inner tank 200 is increased. Thereafter, the refrigerant flowing out of the condenser assembly 100 is transported to the throttling device through the refrigerant outlet pipe 150. The refrigerant is reduced in pressure and throttled by the throttling device and then flows back to the evaporator, thereby starting the next cycle. This reciprocating cycle can eventually produce hot water.

[0057] Finally, it should be noted that the above implementation modes are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A condenser assembly, characterized in that: include: The first header, a second current collecting pipe, the second current collecting pipe is opposite to the first current collecting pipe and is spaced apart from the first current collecting pipe; A plurality of groups of microchannels, wherein the plurality of groups of microchannels are connected between the first header and the second header, and the microchannels are connected between the first header and the second header; Wherein, at least one of the first collecting pipe and the second collecting pipe has an arc-shaped surface which is mutually attached to the outer wall surface of the inner container.

2. The condenser assembly according to claim 1, characterized in that The first collecting pipe and the second collecting pipe are extended along the length direction of the inner tank, the arc surface is extended along the length direction of the first collecting pipe or the second collecting pipe, and the arc surface is bent toward the axial direction of the inner tank.

3. The condenser assembly according to claim 1, characterized in that The curvature of the arc surface is the same as the curvature of the outer wall of the inner container.

4. The condenser assembly according to any one of claims 1 to 3, characterized in that: The cross-section of the first header or the second header is triangular, elliptical, rectangular, semicircular or circular.

5. The condenser assembly according to any one of claims 1 to 3, characterized in that: The width of the first header or the second header along the outer circumferential direction of the inner tank is less than or equal to 15 mm and greater than or equal to 10 mm.

6. The condenser assembly according to any one of claims 1 to 3, characterized in that: A plurality of communication ports are provided on the sides of the first header and the second header which are away from each other, and the microchannels are communicated with the first header and the second header through the communication ports.

7. The condenser assembly according to claim 6, characterized in that The plurality of communication openings are arranged at intervals along the outer periphery of the arc-shaped surface.

8. The condenser assembly according to any one of claims 1 to 3, characterized in that: The condenser further includes a refrigerant inlet pipe and a refrigerant outlet pipe, the multiple groups of microchannels are an even number of groups, and the refrigerant inlet pipe and the refrigerant outlet pipe are both connected to the second header.

9. The condenser assembly according to claim 8, characterized in that The number of groups of the microchannels is greater than or equal to four, and the groups of microchannels decrease step by step along the flow direction of the refrigerant.

10. A heat pump water heater, characterized in that: The invention comprises an inner tank, an outer shell and a condenser assembly as claimed in any one of claims 1 to 9.

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