Condenser assembly, heat pump water heater, and water tank structure

Abstract

The present application relates to the field of water heater, and provides a condenser assembly, heat pump water heaters and a water tank structure. The condenser assembly includes a first header, a second header and multiple groups of microchannels. The second header is provided opposite to and spaced apart from the first header, the multiple groups of microchannels communicate between the first header and the second header, and a number of channels in the multiple groups of microchannels is gradually decreased along a flow direction of a refrigerant in the condenser. The number of channels in the microchannels is provided to be gradually decreased to coordinate with the characteristic changes of the refrigerant in the condenser during the heat exchange process. The number of channels in the microchannels is fully and reasonably allocated, which reduces the influence of the characteristic changes of the refrigerant on the total flow path of the microchannels, and the effectiveness of the total flow area of the microchannel is improved, and the heat exchange efficiency of the condenser is increased. It also helps to reduce energy consumption and implement energy conservation and emission reduction.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority to Chinese application No. 202311745184X filed on December 18, 2023, entitled "Condenser Assembly and Heat Pump Water Heater", to Chinese application No. 2023234595700 filed on December 18, 2023, entitled "Condenser Assembly and Heat Pump Water Heater" and to Chinese application No. 2023234595448 filed on December 18, 2023, entitled "Water Tank Structure and Heat Pump Water Heater", which are hereby incorporated by reference in their entireties.FIELD

[0002] The present application relates to the field of water heater, and in particular to a condenser assembly, heat pump water heaters and a water tank structure.BACKGROUND

[0003] A heat pump water heater has apparent advantages in energy saving and environmental protection since it makes full use of heat energy in the air, and has become a new generation of hot water production equipment subsequent to a boiler, an electric water heater, a gas water heater and a solar water heater. A traditional heat pump water heater consists of a compressor, an evaporator, a throttle valve, a condenser, a water tank, and connection pipes and a control system. The condensers are mostly made of circular copper tubes. One type of condenser is to wind the copper tube in a spiral shape outside the water tank, and another type of condenser is to place a spiral winding tube inside the water tank. Water in the water tank continuously absorbs heat of condensation released by the refrigerant in the copper tube, and finally reaches a set temperature.

[0004] A traditional condenser has low heat exchange efficiency due to unreasonable arrangement of pipelines.BRIEF SUMMARY

[0005] The present application is intended to solve at least one of problems above. The present application provides a condenser assembly, which implements a scientific design and effective microchannel distribution, reduces an impact of flow change on a microchannel, effectively decreases uneven distribution of the microchannel along a flow path, which affects the effectiveness of a total flow area of the microchannel, and improves heat exchange efficiency of a condenser. The present application further provides a water tank structure, which improves a fit between a condenser and an inner tank, increases a contact area between the condenser and the inner tank, and then improves the heat exchange efficiency. It may also facilitate the disassembly and assembly between the condenser and the inner tank, and improve the disassembly and assembly efficiency.

[0006] The present application further provides a heat pump water heater.

[0007] A condenser assembly according to the present application comprises: a first header; a second header, where the second header is provided opposite to and spaced apart from the first header; and multiple groups of microchannels, where the first header and the second header are communicated through the multiple groups of microchannels, and a number of channels in the multiple groups of microchannels is gradually decreased along a flow direction of a refrigerant in the condenser.

[0008] In an embodiment, a number of groups of the microchannels is greater than or equal to four, and the in the multiple groups of microchannels is decreased step-by-step along the flow direction of the refrigerant.

[0009] In an embodiment, an inter-group spacing between two adjacent groups of microchannels is equal to or greater than a spacing between two adjacent microchannels in any group of the microchannels in the two adjacent groups of microchannels.

[0010] In an embodiment, the condenser further comprises a refrigerant inflow tube and a refrigerant outflow tube.

[0011] In an embodiment, a number of groups of the multiple groups of microchannels is an even number.

[0012] In an embodiment, both the refrigerant inflow tube and the refrigerant outflow tube are connected to the second header.

[0013] In an embodiment, the condenser assembly further comprises an insert joint, and the insert joint comprises an insert interface and a snap interface.

[0014] In an embodiment, the insert interface and the snap interface communicate with each other.

[0015] In an embodiment, the insert interface is inserted into and communicates with the refrigerant inflow tube or the refrigerant outflow tube.

[0016] In an embodiment, the insert joint is snapped to an outer wall of the second header through the snap interface.

[0017] In an embodiment, the snap interface is provided corresponding to a refrigerant inlet or a refrigerant outlet at the second header.

[0018] In an embodiment, the snap interface is provided in a C-shape.

[0019] In an embodiment, the snap interface is half-wrapped at the outer wall of the second header.

[0020] In an embodiment, a notch of the snap interface is arranged in a contracted shape.

[0021] In an embodiment, the refrigerant inflow tube comprises a rise section, a first surround section and a descend section connected in sequence.

[0022] In an embodiment, a rise height of the rise section is greater than an arrangement height of the microchannels.

[0023] In an embodiment, the first surround section is arranged in a surrounding manner.

[0024] In an embodiment, the descend section communicates with the refrigerant inlet at the second header through the insert joint.

[0025] In an embodiment, the refrigerant outflow tube comprises an ascend section, a second surround section and a fall section connected in sequence.

[0026] In an embodiment, the ascend section communicates with the refrigerant outlet at the second header.

[0027] In an embodiment, the second surround section is arranged in a surrounding manner.

[0028] In an embodiment, a rise height of the fall section is greater than the arrangement height of the refrigerant outlet.

[0029] In an embodiment, the multiple groups of the microchannels are sleeved around a middle and lower part of a vertical inner tank.

[0030] In an embodiment, the multiple groups of the microchannels are provided opposite to a cold water layer in the inner tank.

[0031] The present application further provides a heat pump water heater, which comprises the condenser assembly as described above, the condenser assembly comprises the first header, the second header and the multiple groups of microchannels, the second header is provided opposite to and spaced apart from the first header, and the multiple groups of the microchannels communicate the first header and the second header.

[0032] In an embodiment, a number of channels in the multiple groups of microchannels is gradually decreased along a flow direction of a refrigerant in the condenser.

[0033] One or more solutions in the embodiments of the present application mentioned above have at least one of the following effects.

[0034] In the present application, the second header is provided opposite to and spaced apart from the first header, and the number of channels in the multiple groups of microchannels is gradually decreased along the flow direction of the refrigerant in the condenser. Since the refrigerant is in a gaseous state when it first enters the pipeline, the refrigerant will begin to liquefy as the temperature in the pipeline decreases, and the state of the fluid will change from gaseous to gas-liquid two-phase. Therefore, a flow area required for the fluid refrigerant at the outlet of the pipeline is less than a flow area required for the gas refrigerant at the inlet, and a flow rate at the inlet is different from a flow rate at the outlet due to the existence of temperature and pressure difference. On this basis, the number of channels in the microchannels is provided to be gradually decreased along the flow direction of the refrigerant in the condenser to coordinate with the characteristic changes of the refrigerant in the condenser during the heat exchange process. The number of channels in the microchannels is fully and reasonably allocated and the flow rate of the refrigerant in the condenser is more uniform, which reduces the influence of the characteristic changes of the refrigerant on the total flow path of the microchannels, ensures that the entire microchannel of the condenser may sufficiently exchange heat, the superheat may be more easily controlled within a reasonable range, the effectiveness of the total flow area of the microchannel is improved, and the heat exchange efficiency of the condenser is increased. It also helps to reduce energy consumption and implement energy conservation and emission reduction. Simultaneously, the flow direction of the refrigerant is also distributed from hot to cold since the water temperature in the inner tank is stratified. The number of channels of the microchannels is provided to be gradually decreased, which may increase an outlet temperature of the condenser, reduce the supercooling, reduce overall upper and lower water temperature stratification of the inner tank, and increase the output of hot water.

[0035] The present application further provides a water tank structure.

[0036] The present application further provides a heat pump water heater.

[0037] The water tank structure according to the present application comprises: an inner tank; a first header; a second header, where the second header is provided opposite to and spaced apart from the first header at an outer wall of the inner tank and the second header is fixedly connected to the inner tank; multiple groups of microchannels, where the multiple groups of microchannels communicate between the first header and the second header; and an elastic member, where the elastic member are connected between the first header and the second header.

[0038] In an embodiment, the water tank structure further comprises a connector, the outer wall of the inner tank is provided with a position post, and the second header is fixedly connected to the position post through the connector.

[0039] In an embodiment, the connector comprises a snap interface and a position hole, the snap interface is snapped to the second header, and the connector is fixedly connected to the position post through the position hole.

[0040] In an embodiment, a number of the elastic members is at least two.

[0041] In an embodiment, at least two elastic members are arranged at an interval along a length direction of the first header and the second header.

[0042] In an embodiment, a number of the position posts is at least two.

[0043] In an embodiment, at least two position posts are arranged at an interval along a height direction of the inner tank.

[0044] In an embodiment, a refrigerant inlet or a refrigerant outlet is provided at an interval at the second header, and the multiple elastic members are correspondingly provided at a bottom of the refrigerant inlet and a bottom of the refrigerant outlet.

[0045] In an embodiment, the water tank structure further comprises a buckle, and at least one end of the elastic member is connected to the first header or the second header through the buckle.

[0046] In an embodiment, at least one end of the elastic member is provided with a snap hook, the buckle comprises a bayonet and a connection arm, and the bayonet is snapped to the first header.

[0047] In an embodiment, the connection arm extends between the first header and the second header.

[0048] In an embodiment, a snap hole is provided at the connection arm, and the snap hole is matched with the snap hook to form a snap connection.

[0049] In an embodiment, the water tank structure further comprises multiple wall-mounted components, and the multiple wall-mounted components are provided at an outer wall surface of the inner tank between the first header and the second header.

[0050] In an embodiment, the multiple wall-mounted components are arranged at an interval along a height direction of the inner tank.

[0051] In an embodiment, the water tank structure comprises a housing, and the housing is covered at an outer circumferential side of the inner tank.

[0052] In an embodiment, the first header, the second header and the microchannels are provided between the inner tank and the housing.

[0053] The present application further provides a heat pump water heater, which comprises the water tank structure as described above.

[0054] One or more solutions in the embodiments of the present application mentioned above have at least one of the following effects.

[0055] In the present application, the second header is fixed to the inner tank, and then the first header is connected to the second header through the elastic members. The condenser may better adapt to the shape and size of the inner tank, the matching problem caused by process accuracy and mount errors is reduced, and the elastic preload provided by the elastic members may effectively improve the fit between the microchannels and the outer wall of the inner tank. The heat exchange area may be increased by improving the fit and contact area between the condenser and the inner tank, and the heat exchange efficiency is improved. The heat pump water heater may generate more heat under the same energy consumption, or reduce energy consumption under the same heat generation, which improves energy utilization efficiency. Simultaneously, the connection between the condenser and the inner tank may be more convenient and quicker since the elastic members are connected between the first header and the second header. The production cost and maintenance cost may be reduced, and both the production efficiency and maintenance efficiency may further be improved. In the present application, the fit and contact area between the condenser and the inner tank are increased by providing the elastic members, which improves the heat exchange efficiency, simultaneously facilitates the disassembly and assembly between the condenser and the inner tank, and the disassembly and assembly efficiency is improved.

[0056] The additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the present application.BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to illustrate the solutions in the embodiments of the present application or in the related art more clearly, the drawings used in the description of the embodiments or the related art are briefly described below. The drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without any creative work for those skilled in the art. FIG. 1 is a schematic structural diagram of a heat pump water heater according to an embodiment of the present application; FIG. 2 is a schematic structural diagram of the heat pump water heater in FIG. 1 with a housing removed; FIG. 3 is an exploded view of the heat pump water heater in FIG. 1 with a head assembly removed; FIG. 4 is a schematic structural diagram of a condenser assembly in FIG. 3; FIG. 5 is a schematic structural diagram of an embodiment of a heat pump water heater according to an embodiment of the present application; FIG. 6 is a schematic structural diagram of a water tank structure and a head assembly according to an embodiment of the present application; and FIG. 7 is an enlarged view of A in FIG. 6. Reference numerals:

[0058] 10: heat pump water heater; 100: condenser assembly; 110: first header; 120: second header; 130: microchannel; 140: refrigerant inflow tube; 141: rise section; 142: first surround section; 143: descend section; 150: refrigerant outflow tube; 151: ascend section; 152: second surround section; 153: fall section; 160: insert joint; 161: insert interface; 162: snap interface; 200: inner tank; 300: housing; 400: wall-mounted assembly; 500: heat assembly; 600: end cover; 700: head assembly; 1011: heat pump water heater; 1001: water tank structure; 1101, condenser assembly; 111: first header; 112: second header; 112a: refrigerant inlet; 112b: refrigerant outlet; 113: microchannel; 114: elastic member; 114a: snap hook; 115: buckle; 115a: bayonet; 115b: connection arm; 115c: snap hole; 1201: connector; 121: snap interface; 122: position hole; 1301: inner tank; 131: position post; 1401: wall-mounted component; 2001: head assembly; 3001: housing. DETAILED DESCRIPTION

[0059] Embodiments of the present application are further described in detail below with reference to the drawings and embodiments. The following embodiments are intended to illustrate the application, but are not intended to limit the scope of the application.

[0060] In the description of the embodiments of the present application, it is to be noted that the orientation or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or component stated must have a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting the embodiments of the present application. Moreover, the terms "first", "second", "third", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0061] In the description of the present application, it should be noted that unless explicitly specified and defined otherwise, the terms "connected to" and "connected" shall be understood broadly, for example, it may be either fixedly connected or detachably connected, or can be integrated; it may be either mechanically connected, or electrically connected; it may be either directly connected, or indirectly connected through an intermediate medium. The specific meanings of the terms above in the present application can be understood by a person skilled in the art in accordance with specific conditions.

[0062] In the embodiments of this application, unless otherwise clearly stated and defined, the first feature being located "on" or "under" the second feature means that the first feature is in direct contact with the second feature or the first feature is in contact with the second feature by an intervening media. In addition, the first feature is "on", "above" and "over" the second feature can refer to that the first feature is directly above or obliquely above the second feature, or simply refer to that the level height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "beneath" the second feature can refer to that the first feature is directly below or obliquely below the second feature, or simply refer to that the level height of the first feature is lower than that of the second feature.

[0063] In the description of this specification, description with reference to the terms "one embodiment", "some embodiments", "an example", "specific example", "some examples" and the like, refers to that specific features, structures, materials or characteristics described in combination with an embodiment or an example are comprised in at least one embodiment or example according to the embodiments of the present application. In this specification, schematic representations of the above terms are not necessarily directed to a same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

[0064] A heat pump water heater has apparent advantages in energy saving and environmental protection since it makes full use of heat energy in the air, and has become a new generation of hot water production equipment subsequent to a boiler, an electric water heater, a gas water heater and a solar water heater. A traditional heat pump water heater consists of a compressor, an evaporator, a throttle valve, a condenser, a water tank, connection pipes and a control system. The condensers are mostly made of circular copper tubes. One type of condenser is to wind the copper tube in a spiral shape outside the water tank, and another type of condenser is to place a spiral winding tube inside the water tank. Water in the water tank continuously absorbs heat of condensation released by the refrigerant in the copper tube, and finally reaches a set temperature.

[0065] A traditional condenser has low heat exchange efficiency due to unreasonable arrangement of pipelines.

[0066] The present application provides a condenser assembly and a heat pump water heater.

[0067] In an embodiment of the present application, referring to FIG. 1 to FIG. 3, the condenser assembly 100 comprises a first header 110, a second header 120 and multiple groups of microchannels 130. The second header 120 is provided opposite to and spaced apart from the first header 110, the multiple groups of microchannels 130 communicate between the first header 110 and the second header 120, and a number of channels in the multiple groups of microchannels 130 is gradually decreased along a flow direction of a refrigerant in the condenser.

[0068] In the present application, the second header 120 is provided opposite to and spaced apart from the first header 110, and the number of channels in the microchannels 130 is gradually decreased along the flow direction of the refrigerant in the condenser. In an embodiment, since the refrigerant is in a gaseous state when it first enters the pipeline, the refrigerant will begin to liquefy as the temperature in the pipeline decreases, and the state of the fluid will change from gaseous to gas-liquid two-phase. Therefore, a flow area required for the fluid refrigerant at the outlet of the pipeline is less than a flow area required for the gas refrigerant at the inlet, and a flow rate at the inlet is different from a flow rate at the outlet due to the existence of temperature and pressure difference. On this basis, the number of channels in the microchannels 130 is provided to be gradually decreased along the flow direction of the refrigerant in the condenser to coordinate with the characteristic changes of the refrigerant in the condenser during the heat exchange process. The number of channels in the microchannels 130 is fully and reasonably allocated and the flow rate of the refrigerant in the condenser is more uniform, which ensures that the entire microchannel 130 of the condenser may sufficiently exchange heat so that the superheat may be more easily controlled within a reasonable range, reduces the influence of the characteristic changes of the refrigerant on the total flow path of the microchannels 130, improves the effectiveness of the total flow area of the microchannel 130, and increases the heat exchange efficiency of the condenser. It also helps to reduce energy consumption and implement energy conservation and emission reduction. Simultaneously, the flow direction of the refrigerant is also distributed from hot to cold since the water temperature in the inner tank 200 is stratified. The number of channels in the microchannels 130 is provided to be gradually decreased, which may increase an outlet temperature of the condenser, reduce the supercooling, reduce overall upper and lower water temperature stratification of the inner tank 200, and increase the output of hot water.

[0069] The first header 110 and the second header 120 provide connection and support for the microchannels 130. The first header 110 is provided opposite to the second header 120, which may better guide the flow of the refrigerant, conveniently prolong the flow path of the refrigerant in the microchannels 130, and increase the contact area. In an embodiment, the arrangement of the first header and the second header is a key to stack and wind the multiple groups of microchannels. Through the arrangement of the first header and the second header, the refrigerant may sequentially flow in the multiple groups of microchannels, the flow path of the refrigerant may be prolonged by additionally providing the multiple groups of microchannels as needed, which increases the contact area between the condenser and the inner tank. Simultaneously, the second header 120 is provided opposite to and spaced apart from the first header 110, which may avoid other mechanisms of the heat pump water heater 10.

[0070] The multiple groups of microchannels 130 communicate between the first header 110 and the second header 120, which increases the heat exchange area between the refrigerant and the external environment. In other embodiments, the heat exchange efficiency may be further optimized by changing the shape, size and material of the microchannels 130.

[0071] According to the embodiment of the present application, the number of channels of the multiple groups of microchannels 130 may be gradually decreased in an arithmetic sequence, a geometric progression or a step-by-step manner, etc., along the flow direction of the refrigerant in the condenser, no special limitation is made here, and the total flow path area between each group of microchannels 130 may be gradually decreased. In another embodiments, in order to increase the diversity of the microchannels 130 to better adapt to different working conditions and refrigerant types, the microchannels 130 may be provided to microchannels 130 of different shapes, sizes or materials. For example, microchannels 130 of different diameters, lengths and arrangements may be provided to increase the heat exchange efficiency and adaptability.

[0072] Referring to FIG. 2 to FIG. 4, in an embodiment, a number of groups of the microchannels 130 is greater than or equal to four, and the number of channels in the multiple groups of microchannels 130 is decreased step-by-step along the flow direction of the refrigerant. In an embodiment, the multiple groups of microchannels 130 may comprise four groups, five groups, six groups, seven groups or eight groups, etc., and it is not specifically limited here. The present embodiment is described with the number of groups of microchannels 130 being four groups, and other embodiments may be implemented with reference to this embodiment. The four groups of microchannels 130 decrease step by step along the flow direction of the refrigerant, and thus 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 larger number of channels are required and the refrigerant may be in large-area contact with the inner tank 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 changed 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 decreased, the influence of flow changes on the microchannels 130 may be better controlled under the same total number of channels in the microchannels 130, and the distribution of the refrigerant in the microchannels 130 is optimized. In addition, the flow area of the refrigerant flowing through different microchannels 130 is gradually decreased since the number of channels in the microchannels 130 is decreased step by step, which helps to better utilize the flow area and improve the heat exchange efficiency. Simultaneously, this arrangement may also avoid the problem of the effectiveness of the total flow area due to uneven distribution along the flow path.

[0073] In an embodiment, the total number of microchannels 130 may be 24, 26 or 33 channels, etc., and the four groups of microchannels 130 having 24 channels may be arranged in a descending order of 10, 7, 5 and 2. The four groups of microchannels 130 having 26 channels may be arranged in a descending order of 11, 8, 5 and 2 or 9, 8, 5 and 2. The five groups of microchannels 130 having 33 channels may be arranged in a descending order of 11, 8, 6, 5 and 3 or the four groups of microchannels 130 having 33 channels may be arranged in a descending order of 12, 9, 6 and 3, which may be set as needed, and is not specifically limited here.

[0074] Referring to FIG. 2 to FIG. 4, in an embodiment, an inter-group spacing between two adjacent groups of microchannels 130 is equal to or greater than a spacing between two adjacent microchannels 130 in any group of the microchannels 130 in the two adjacent groups of microchannels 130. As such, the flow of the refrigerant may be better controlled, and excessive refrigerant aggregation in certain parts may be avoided, which improves the heating uniformity of the inner tank 200 by the condenser assembly 100. In an embodiment, when the refrigerant flows through the first group of microchannels 130, the refrigerant may obtain a larger heat dissipation area due to the large number of channels, which helps to reduce the temperature of the refrigerant. As the refrigerant continues to flow and enters the second group of microchannels 130, the influence of flow changes on the microchannels 130 may be better controlled and the distribution of the refrigerant in the microchannels 130 is optimized due to the large intergroup spacing. Mutual radiation heat exchange between the microchannels 130 may be avoided since the intergroup spacing between two adjacent groups of microchannels 130 is greater than or equal to a spacing between two adjacent microchannels 130, and the impact is relatively small since the states of the refrigerants in the same group are relatively close. In this embodiment, the problem of the effectiveness of the total flow area due to uneven distribution along the flow path is avoided by providing an inter-group spacing between two adjacent groups of microchannels to be equal to or greater than a spacing between two adjacent microchannels in any group of the microchannels in the two adjacent groups of microchannels. The heat exchange efficiency between the condenser assembly 100 and the inner tank 200 is improved.

[0075] Referring to FIG. 4, in an embodiment, the condenser further comprises a refrigerant inflow tube 140 and a refrigerant outflow tube 150, and when a number of groups of the multiple groups of microchannels 130 is an even number, both the refrigerant inflow tube 140 and the refrigerant outflow tube 150 are connected to the first header 110 or the second header 120. In an embodiment of the present application, the flow direction of the microchannels 130 in the same group is consistent, and the multiple groups of microchannels 130 are stacked along a flow direction of the refrigerant. Therefore, when the number of groups of the multiple groups of microchannels 130 is an even number, both the refrigerant inflow tube 140 and the refrigerant outflow tube 150 are connected to the first header 110 or the second header 120. As such, the flow and heat exchange process of the refrigerant may be effectively optimized, and the efficiency and performance of the condenser may be improved by matching the refrigerant inflow tube 140 and the refrigerant outflow tube 150 with the layout of the microchannels 130.

[0076] Referring to FIG. 4, in an embodiment, the condenser assembly 100 further comprises an insert joint 160, which comprises an insert interface 161 and a snap interface 162. The insert interface 161 and the snap interface 162 communicate with each other, and the insert interface 161 is inserted into and communicates with the refrigerant inflow tube 140 or the refrigerant outflow tube 150. The insert joint 160 is snapped to an outer wall of the first header 110 or the second header 120 through the snap interface 162, and the snap interface 162 is provided corresponding to the refrigerant inlet and refrigerant outlet at the first header 110 or the second header 120. In this embodiment, the assembly of the condenser is easier through the design of the insert joint. Matching of the insert interface 161 and the snap interface 162 may quickly connect the refrigerant inflow tube 140 or the refrigerant outflow tube 150 to the first header 110 or the second header 120 without using other tools or complicated mounting steps. The insert joint 160 is snapped to the outer wall of the first header 110 or the second header 120 through the snap interface 162, which may increase the stability of the condenser. The design of the snap interface 162 may snap the insert joint 160 firmly to the outer wall of the first header 110 or the second header 120, which prevents the condenser from loosening or falling off during operation. Simultaneously, it is convenient to assemble and align the interface at the initial stage of fixation. A position of the snap interface 162 corresponds to the refrigerant inlet and the refrigerant outlet, which may make the refrigerant flow in and flow out of the microchannel 130 smoother, which reduces flow resistance, and thus improve heat exchange efficiency.

[0077] Referring to FIG. 2 and FIG. 4, in an embodiment, the snap interface 162 is provided in a C-shape, the snap interface 162 is half-wrapped at the outer wall of the first header 110 or the second header 120, and a notch of the snap interface 162 is arranged in a contracted shape. In an embodiment, the design of the C-shaped snap interface 162 may better adapt to the shape of the first header 110 or the second header 120, and the half-wrapped arrangement may increase the contact area between the snap interface 162 and the header, which improves the stability of the connection. The design of the contracted-shaped notch may snap the insert joint 160 more firmly to the headers, which reduces the difficulty and mount cost. In addition, the design of the C-shaped snap interface 162 may increase the adaptability of the insert joint 160 to headers of different diameters, and the insert joint 160 has better compatibility and may adapt to different condenser assemblies 100. The influence of vibration and impact on the connection part may be reduced, and the vibration resistance of the condenser is improved since the design of the snap interface 162 fits the outer wall of the first header 110 or the second header 120. The half-wrapped design of the snap interface 162 may make it easier to remove the insert joint 160 from the header, which is convenient for maintenance and replacement.

[0078] Referring to FIG. 3 and FIG. 4, in an embodiment, the refrigerant inflow tube 140 comprises a rise section 141, a first surround section 142 and a descend section 143 connected in sequence. A rise height of the rise section 141 is greater than the arrangement height of the microchannels 130, the first surround section 142 is arranged in a surrounding manner in a counterclockwise direction, and the descend section 143 communicates with the refrigerant inlet at the first header 110 or the second header 120 through the insert joint 160. In an embodiment, the present application divides the refrigerant flow into different stages by arranging the refrigerant inflow tube 140 in sections, which may better control the flow direction, speed and distribution of the refrigerant in each stage. The design of each stage may be optimized based on actual needs to provide better heat exchange efficiency and stability. This helps to improve the heat exchange efficiency. With this sectioned design, the manufacturing process may be simplified and mounting may be more convenient. In addition, the refrigerant in the refrigerant inflow tube 140 is in gaseous state. In order to prevent the liquefied refrigerant from flowing back to the compressor and forming air blockage, the rise section 141, the first surround section 142 and the descend section 143 are arranged in sequence to increase the stability of the condenser during operation and reduce vibration and deviation. Simultaneously, the first surround section 142 may be conveniently connected to the position of the compressor located in the head assembly 700 by surrounding the first surround section 142 in the counterclockwise direction. The descend section 143 is connected to the first header 110 or the second header 120 through the insert joint 160, and the layout of the refrigerant inflow tube 140 is more flexible and may be adjusted and optimized according to actual needs.

[0079] Referring to FIG. 3 and FIG. 4, in an embodiment, the refrigerant outflow tube 150 comprises an ascend section 151, a second surround section 152 and a fall section 153 connected in sequence. The ascend section 151 communicates with the refrigerant outlet at the first header 110 or the second header 120, the second surround section 152 is arranged in a clockwise direction, and the rise height of the fall section 153 is greater than the arrangement height of the refrigerant outlet. In an embodiment, the ascend section 151 communicates with the refrigerant outlet at the second header 120. Its main function is to lead out the refrigerant in the condenser assembly 100 and ensure that the refrigerant may flow smoothly and unimpeded into the components of the next heat pump system. Through the ascend design, the flow rate of the refrigerant at the refrigerant outlet is slowed down, the heat exchange time of the refrigerant in the microchannels 130 is prolonged, and the heat exchange efficiency is improved. The second surround section 152 is arranged in a surrounding manner in a clockwise direction, the main purpose of which is to avoid other structures of the heat pump water heater 10. Simultaneously, it is also convenient to connect with the evaporator arranged in the head assembly 700, and it may also be similar to the ascend section to prolong the heat exchange time between the second surround section 152 and the inner tank 200. Through the surrounding arrangement, the refrigerant may release heat in a longer path, which helps to improve the energy efficiency of the entire heat pump system. Simultaneously, such a surrounding design also helps to reduce the flow rate of the refrigerant and ensure that the refrigerant flows into the subsequent pipes or components more stably. The rise height of the fall section 153 is greater than the arrangement height of the refrigerant outlet. It ensures that the refrigerant may enter the fall section 153 more stably after passing through the ascend section 151 and the second surround section 152, which avoids refrigerant turbulence or reflux caused by excessive flow rate or sudden change of direction. A main function of the fall section 153 is to guide the refrigerant from a high position to a low position, and provides a suitable refrigerant input for the subsequent throttle device or evaporator.

[0080] Referring to Fig. 2, in an embodiment, the multiple groups of microchannels 130 are sleeved at the middle and lower part of the vertical inner tank 200, and are provided opposite to the cold water layer in the inner tank 200. In this embodiment, by providing the microchannels 130 at the middle and lower part of the inner tank 200 and opposite to the cold water layer, it is possible to ensure that the refrigerant most fully exchange heat with the water in the inner tank 200 when flowing in the microchannels 130. Because heat always flows from a high temperature area to a low temperature area, placing the microchannel 130 below the cold water layer may maximize the temperature difference between the refrigerant and the cold water, which improves the heat exchange efficiency. The cold water in the inner tank 200 is usually located at the bottom, while the hot water is located at the top. By providing the microchannel 130 at the middle and lower part and opposite to the cold water layer, the cold water at the bottom may be heated more effectively, and its upward circulation may be promoted, which ensures that the water in the entire inner tank 200 may be heated evenly and effectively. The refrigerant may heat the cold water to the set temperature in a shorter time due to the relative position relationship between the microchannels 130 and the cold water layer, which reduces a cycle number of refrigerant and the operating time of the compressor, and saves energy. This embodiment ensures that the water in the entire inner tank 200 may be evenly heated by corresponding the microchannels 130 to the cold water layer, which avoids possible local overheating or overcooling, and improves the quality and comfort of hot water. Simultaneously, the microchannels 130 are directly integrated at the middle and lower part of the inner tank 200, which may not only reduce the number of external pipes and connectors, but also make the entire heat pump water heater 10 more compact and beautiful.

[0081] The present application further provides a heat pump water heater 10. The heat pump water heater 10 comprises an inner tank 200 and the above-mentioned condenser assembly 100, where the specific structure of the condenser assembly 100 refers to the above-mentioned embodiments. 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 comprises all 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.

[0082] In the embodiment of the present application, the heat pump water heater 10 comprises a head assembly 700, an inner tank 200, a housing 300, an end cover 600, a heat assembly 500, a wall-mounted assembly 400, a heat pump system, etc. The housing 300 has a cavity and an opening inside, and the end cover 600 covers the opening. Both the inner tank 200 and the heat pump system are located in the housing 300. The inner tank 200 is used for receiving water and is made of a heat-conducting material. The heat pump system is used for heating the water in the inner tank 200, and the housing 300 protects the inner tank 200 and the heat pump system. The inner tank 200 may be integrated, or an end cover 600 may be provided at one end, or it may comprise a tank body and end covers 600 provided at both ends of the tank body. The heat assembly 500 is used for assisting in heating and increasing the temperature of the hot water. In some cases, it is necessary to start a separately provided heat assembly 500 to assist in heating when the ambient heat absorbed by the heat pump water heater 10 is not enough to raise the water temperature to the required temperature. This ensures that hot water with sufficient heat may be provided in any situation to meet the needs of users. In addition, the separately provided heat assembly 500 may also improve the stability and control accuracy of the temperature of hot water. The temperature of hot water may be adjusted more accurately to avoid overheating or insufficient temperature by accurately controlling the output power and time of the heat assembly 500. The heat pump system may comprise a condenser assembly 100 and a heat pump host mainly composed of a compressor, a throttle device and an evaporator. In an embodiment, the compressor has an exhaust port and an air return port, the air outlet of the evaporator communicates with the air return port of the compressor. The exhaust port of the compressor communicates with the refrigerant inlet of the condenser assembly 100 through a refrigerant inflow tube 140, the refrigerant outlet of the condenser assembly 100 communicates with the air inlet of the evaporator through a refrigerant outflow tube 150, and the throttle device is provided between the condenser and the evaporator. When the heat pump water heater 10 is operating, the refrigerant in the evaporator absorbs the heat of the surrounding air and is then heated and vaporized and the heated and vaporized refrigerant enters the compressor and becomes a high-temperature and high-pressure gas under the action of the compressor. Then, the high-temperature and high-pressure gas is transported to the pipeline of the condenser assembly 100 through the refrigerant inflow tube 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, and the temperature of the water in the inner tank 200 is increased. Then, the refrigerant flowing out of the condenser assembly 100 is transported to the throttle device through the refrigerant outflow tube 150. The refrigerant is de-pressurized and throttled by the throttle device and then flows back to the evaporator to start the next cycle. This cycle may be reciprocated to eventually produce hot water.

[0083] The present application provides a water tank structure and a heat pump water heater.

[0084] In the embodiment of the present application, referring to FIG. 5 to FIG. 7, the water tank structure 1001 comprises an inner tank 1301, a first header 111, a second header 112, multiple groups of microchannels 113 and elastic members 114. The second header 112 is provided opposite to and spaced apart from the first header 111 at the outer wall of the inner tank 1301, and the second header 112 is fixedly connected to the inner tank 1301. The multiple groups of microchannels 113 communicate between the first header 111 and the second header 112 and the elastic members are connected between the first header 111 and the second header 112.

[0085] The first header 111 and the second header 112 may collect and guide the flow of the refrigerant. The first header 111 has similar structure and function to the second header 112. One of the first header 111 and the second header 112 is movably arranged relative to the other side of the inner tank 1301, that is, when the first header 111 or the second header 112 is installed, one of the first header 111 and the second header 112 is first installed and fixed with the inner tank 1301, and the other of the first header 111 and the second header 112 is then fixed relative to one of the first header 111 and the second header 112 through the elastic members 114, the condenser may better adapt to the shape and size of the inner tank 1301, which improves the fit between the condenser and the inner tank 1301. In an embodiment, if the shape of the inner tank 1301 changes, the movably arranged side may be moved relative to the other side to maintain good contact with the inner tank 1301. The microchannels 113 are used for increasing the contact area between the condenser and the inner tank 1301, which increases the heat exchange area and improves the heat exchange efficiency. The function of the elastic members 114 is to provide a certain elastic preload and the microchannels 113 may fit closely to the outer wall of the inner tank 1301, which further increases the contact area between the microchannels 113 and the inner tank 1301, and further improves the heat exchange efficiency. Simultaneously, the elastic members 114 may also conveniently disassemble and assemble the condenser assembly 1101 and the inner tank 1301, which reduces both the production cost and maintenance cost.

[0086] In the present application, one of the first header 111 and the second header 112 is movably arranged relative to the other side of the inner tank 1301, and then the first header 111 and the second header 112 are connected through the elastic members 114, the condenser may better adapt to the shape and size of the inner tank 1301, the matching problem caused by process accuracy and mount errors is reduced, and the elastic preload provided by the elastic members 114 may effectively improve the fit between the microchannels 113 and the outer wall of the inner tank 1301. The heat exchange area may be increased by improving the fit and contact area between the condenser and the inner tank 1301, and the heat exchange efficiency is improved. The heat pump water heater 1011 may generate more heat under the same energy consumption, or reduce energy consumption under the same heat generation, which improves energy utilization efficiency. Simultaneously, the connection between the condenser and the inner tank 1301 may be more convenient and quicker since the elastic members 114 are connected between the first header 111 and the second header 112. The production cost and maintenance cost may be reduced, and both the production efficiency and maintenance efficiency may further be improved. In the present application, the fit and contact area between the condenser and the inner tank 1301 are improved by providing the elastic members 114, which improves the heat exchange efficiency, simultaneously facilitates the disassembly and assembly between the condenser and the inner tank 1301, and the disassembly and assembly efficiency is improved.

[0087] Referring to FIG. 6 and FIG. 7, in an embodiment, the condenser assembly 1101 further comprises a buckle 115, and at least one end of the elastic member 114 is connected to the first header 111 or the second header 112 through the buckle 115. In an embodiment, the design of the buckle 115 may vary depending on the specific application scenario and requirements. For example, the buckle 115 may be designed to be detachable or fixed as needed, or it may be designed to be manually operated or automatically operated as needed. In this embodiment, the buckle 115 is a connector 1201 for connecting the elastic member 114 to the first header 111 or the second header 112. An end of the elastic member 114 may penetrate through the buckle 115 and be fixedly connected to the buckle 115, while another end of the elastic member 114 is fixedly connected to the first header 111 or the second header 112. As such, the elastic members 114 may be easily installed and removed, and the stable connection between the elastic member 114 and the first header 111 and the second header 112 may be ensured. In addition, the buckle 115 may also play a certain positioning and supporting role, which makes the condenser more stable and reliable during installation and use.

[0088] Referring to FIG. 7, in an embodiment, at least one end of each elastic member 114 is provided with a snap hook 114a, and the buckle 115 comprises a bayonet 115a and a connection arm 115b. The bayonet 115a is snapped to the first header 111 or the second header 112, the connection arm 115b extends between the first header 111 and the second header 112, and the connection arm 115b is provided with a snap hole 115c, and the snap hole 115c is matched with the snap hook 114a to form connection of a buckle 115. In an embodiment, the elastic member 114 may be provided with a snap hook 114a at one end, or at both ends. When the snap hook 114a is provided at one end, the other end may be directly or indirectly fixedly connected to the first header 111 or the second header 112. The snap hook 114a is used for being in fit connection with the buckle 115 to connect the elastic member 114 and the buckle 115 conveniently, while further ensuring the stability and reliability of the connection. The connection arm 115b is used to support and position the elastic member 114. The correct position and direction of the elastic member 114 in the condenser may be ensured. A snap hole 115c is further provided at the connection arm 115b, and the snap hole 115c may be matched with the snap hook 114a of the elastic member 114 to form connection of a buckle 115 to ensure a stable connection between the elastic member 114 and the buckle 115, and the elastic member 114 may also be easily installed and removed.

[0089] Referring to FIG. 6, in an embodiment, the number of elastic members 114 is at least two, and at least two elastic members 114 are arranged at intervals along the height direction of the first header 111 and the second header 112. As such, the contact area and fit between the condenser and the inner tank 1301 may be increased, and the condenser may better adapt to the shape and size of the inner tank 1301 since the multiple elastic members 114 may provide more support points. At least two elastic members 114 are arranged at intervals along the height direction of the first header 111 and the second header 112, which may further increase the contact area and fit between the condenser and the inner tank 1301. By arranging the elastic members 114 at intervals in the height direction, the condenser may better fit the inner tank 1301 in the height direction, the heat exchange area is increased, and the heat exchange efficiency is improved. In addition, the stability of the condenser may be further improved. More support points may be provided since the multiple elastic members 114 are arranged at intervals along the height direction, which increases the stability of the condenser. Simultaneously, the elastic members 114 may also be easily installed and removed since the multiple elastic members 114 may be more easily connected and removed from the first header 111 and the second header 112. In addition, both the production cost and maintenance cost may be further reduced.

[0090] Referring to FIG. 6, in an embodiment, the first header 111 or the second header 112 is spaced apart at the refrigerant inlet 112a or the refrigerant outlet 112b, and multiple elastic members 114 are correspondingly provided at the bottom of the refrigerant inlet 112a and the refrigerant outlet 112b. As such, the elastic members 114 may play a greater role in the connection and fixation between the condenser and the inner tank 1301. The elastic member 114 may better adapt to the shape and size of the inner tank 1301, and increase the fit and contact area between the condenser and the inner tank 1301 since the elastic member 114 is located at the bottom of the refrigerant inlet 112a and the refrigerant outlet 112b. In addition, the connection stability of the condenser may be further improved. More support points may be provided to increase the stability of the condenser since the multiple elastic members 114 are correspondingly arranged at the bottom of the refrigerant inlet 112a and the refrigerant outlet 112b. Simultaneously, the elastic members 114 may also be easily installed and removed by this arrangement and both production costs and maintenance costs are reduced since the multiple elastic members 114 may be more easily connected and removed from the first header 111 and the second header 112.

[0091] Referring to FIG. 6 and FIG. 7, in an embodiment, the water tank structure 1001 further comprises a connector 1201, a position post 131 at an outer wall of the inner tank 1301. The first header 111 or the second header 112 is connected fixedly to the position post 131 through the connector 1201. In this embodiment, the correct connection and stability of the inner tank 1301 and the condenser may be ensured by using the connector 1201 and the position post 131. The position post 131 at the outer wall of the inner tank 1301 may be a protruding structure for being matched with the connector 1201. It is convenient to connect and disassemble the inner tank 1301 with / from the condenser. Simultaneously, the position post 131 may further ensure the stability and reliability of the inner tank 1301 during installation and usage. The first header 111 or the second header 112 may be connected fixedly to the position post 131 through the connector 1201 to ensure the correct connection and stability between the condenser and the inner tank 1301. It is also convenient to install and disassemble the condenser and the inner tank 1301, and both production costs and maintenance costs are reduced.

[0092] Referring to FIG. 6, in an embodiment, the number of the position posts 131 is at least two and at least two position posts 131 are arranged at intervals along the height direction of the inner tank 1301. The connector 1201 comprises a snap interface 121 and a position hole 122. The snap interface 121 is connected to the first header 111 or the second header 112 through a buckle 115, and the connector 1201 is connected fixedly to the position post 131 through the position hole 122. In this embodiment, the number of position posts 131 is at least two, which may be provided as required and is not specifically limited here. The multiple position posts 131 are arranged at intervals along the height direction of the inner tank 1301, and a more uniform fixed anchor point may be increased when the condenser is installed around the outside of the inner tank 1301. The microchannels 113 is better fitted to the outer wall of the inner tank 1301, the heat exchange area is increased, and the heat exchange efficiency is improved.

[0093] In an embodiment, the connector 1201 comprises a snap interface 121 and a position hole 122. The snap interface 121 is connected to the first header 111 or the second header 112 through the buckle 115, which may ensure the stable connection between the condenser and the inner tank 1301. The position hole 122 is used to connect fixedly the connector 1201 to the position post 131, and this connection manner may further increase the stability between the condenser assembly 1101 and the inner tank 1301. As such, in the present embodiment, the connector 1201 may be aligned and fixed with the inner tank 1301 in the height direction through matching the position hole 122 with the position post 131, which ensures the correct connection and stability between the condenser and the inner tank 1301. Simultaneously, it is also convenient to install and disassemble the condenser and the inner tank 1301, and both production costs and maintenance costs are reduced.

[0094] Referring to FIG. 5 to FIG. 7, in an embodiment, the water tank structure 1001 further comprises multiple wall-mounted components 1401, the multiple wall-mounted components 1401 are provided at the outer wall surface of the inner tank 1301 between the first header 111 and the second header 112. The multiple wall-mounted components 1401 are arranged at intervals along the height direction of the inner tank 1301. In this embodiment, the multiple wall-mounted components 1401 are arranged at the inner tank 1301, to facilitate the wall mounting of the heat pump water heater 1011, and the multiple wall-mounted components may improve the firmness of the wall mounting. In an embodiment, the wall-mounted components 1401 may be a protruding or recessed structure for connecting and matching with the inner tank 1301. In order to prevent the wall-mounted components 1401 from interfering with the condenser assembly 1101 wrapped at the outer wall of the inner tank 1301 during installation, the multiple wall-mounted components 1401 are provided at the outer wall surface of the inner tank 1301 between the first header 111 and the second header 112 to ensure the stable connection and reliability between the wall-mounted components 1401, the condenser and the inner tank 1301.

[0095] The present application further provides a heat pump water heater 1011. The heat pump water heater 1011 comprises a housing, a head assembly 2001 and the above-mentioned water tank structure 1001. The specific structure of the water tank structure 1001 refers to the above-mentioned embodiment. In an embodiment, since the above-mentioned water tank structure 1001 is used in the heat pump water heater 1011, the embodiment of the heat pump water heater 1011 comprises all solutions of all embodiments of the above-mentioned water tank structure 1001, and the effects achieved are also exactly the same, which will not be repeated here.

[0096] In an embodiment, the heat pump water heater 1011 comprises a head assembly 2001, an inner tank 1301, a housing 3001, a heat pump system, etc. The housing 3001 has a cavity inside. Both the inner tank 1301 and the heat pump system are located in the housing 3001. The inner tank 1301 is used for receiving water and is made of a heat-conducting material. The heat pump system is used for heating the water in the inner tank 1301, and the housing 3001 protects the inner tank 1301 and the heat pump system. The inner tank 1301 may be integrally formed, or an end cover may be provided at one end, or it may comprise a tank body and end covers provided at both ends of the tank body. The heat pump system may comprise a condenser assembly 1101 and a heat pump host mainly composed of a compressor, a throttle device, and an evaporator. In an embodiment, the compressor has an exhaust port and an air return port, the air outlet of the evaporator communicates with the air return port of the compressor. The exhaust port of the compressor communicates with the refrigerant inlet 112a of the condenser assembly 1101 through a refrigerant inflow tube, the refrigerant outlet 112b of the condenser assembly 1101 communicates with the air inlet of the evaporator through a refrigerant outflow tube, and the throttle device is provided between the condenser and the evaporator. When the heat pump water heater 1011 is operating, the refrigerant in the evaporator absorbs the heat of the surrounding air and is then heated and vaporized, and the heated and vaporized refrigerant enters the compressor and becomes a high-temperature and high-pressure gas under the action of the compressor. Then, the high-temperature and high-pressure gas is transported to the pipeline of the condenser assembly 1101 through the refrigerant inflow tube. 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 1101, and the temperature of the water in the inner tank 1301 is increased. The refrigerant flowing out of the condenser assembly 1101 is transported to the throttle device through the refrigerant outflow tube. The refrigerant is de-pressurized and throttled by the throttle device and then flows back to the evaporator to start the next cycle. This cycle may be reciprocated to eventually produce hot water.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the present application, but not to limit the present application. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent replacements of the solutions of the application do not depart from the scope of the solutions of the application, and should all be covered in the scope of the claims of this application.

Claims

1. A condenser assembly, comprising: a first header; a second header, wherein the second header being provided opposite to and spaced apart from the first header; and multiple groups of microchannels, wherein the first header and the second header are communicated through the multiple groups of microchannels , and a number of channels in the multiple groups of microchannels is gradually decreased along a flow direction of a refrigerant in the condenser.

2. The condenser assembly of claim 1, wherein a number of groups of the microchannels is greater than or equal to four, and the in the multiple groups of microchannels is decreased step-by-step along the flow direction of the refrigerant.

3. The condenser assembly of claim 2, wherein an inter-group spacing between two adjacent groups of microchannels is equal to or greater than a spacing between two adjacent microchannels in any group of the microchannels in the two adjacent groups of microchannels.

4. The condenser assembly of any of claims 1 to 3, wherein the condenser further comprises a refrigerant inflow tube and a refrigerant outflow tube, a number of groups of the multiple groups of microchannels is an even number, and both the refrigerant inflow tube and the refrigerant outflow tube are connected to the second header.

5. The condenser assembly of claim 4, wherein the condenser assembly further comprises an insert joint, and the insert joint comprises an insert interface and a snap interface, the insert interface and the snap interface communicate with each other, the insert interface is inserted into and communicates with the refrigerant inflow tube or the refrigerant outflow tube, the insert joint is snapped to an outer wall of the second header through the snap interface, and the snap interface is provided corresponding to a refrigerant inlet or a refrigerant outlet at the second header.

6. The condenser assembly of claim 5, wherein the snap interface is provided in a C-shape, the snap interface is half-wrapped at the outer wall of the second header, and a notch of the snap interface is arranged in a contracted shape.

7. The condenser assembly of claim 5 or 6, wherein the refrigerant inflow tube comprises a rise section, a first surround section and a descend section connected in sequence, a rise height of the rise section is greater than an arrangement height of the microchannel, the first surround section is arranged in a surrounding manner, and the descend section communicates with the refrigerant inlet at the second header through the insert joint.

8. The condenser assembly of any of claims 4 to 7, wherein the refrigerant outflow tube comprises an ascend section, a second surround section and a fall section connected in sequence, the ascend section communicates with the refrigerant outlet at the second header, the second surround section is arranged in a surrounding manner, and a rise height of the fall section is greater than an arrangement height of the refrigerant outlet.

9. The condenser assembly of any of claims 1 to 8, wherein the multiple groups of the microchannels are sleeved around a middle and lower part of a vertical inner tank, and the multiple groups of the microchannels are provided opposite to a cold water layer in the inner tank.

10. A heat pump water heater, comprising a condenser assembly of any of claims 1 to 9.

11. A water tank structure, comprising: an inner tank; a first header; a second header, the second header being provided opposite to and spaced apart from the first header at an outer wall of the inner tank and the second header being fixedly connected to the inner tank; multiple groups of microchannels, the first header and the second header being communicated through the multiple groups of microchannels; and an elastic member, the elastic member being connected between the first header and the second header.

12. The water tank structure of claim 11, further comprising a connector, the outer wall of the inner tank is provided with a position post, and the second header is fixedly connected to the position post through the connector.

13. The water tank structure of claim 12, wherein the connector comprises a snap interface and a position hole, the snap interface is snapped to the second header, and the connector is fixedly connected to the position post through the position hole.

14. The water tank structure of claim 12 or 13, wherein a number of the elastic members is at least two, the at least two elastic members are arranged at an interval along a length direction of the first header and the second header; and / or, a number of the position posts is at least two, the at least two position posts are arranged at an interval along a height direction of the inner tank.

15. The water tank structure of claim 14, wherein a refrigerant inlet or a refrigerant outlet is provided at an interval at the second header, and the multiple elastic members are correspondingly provided at a bottom of the refrigerant inlet and a bottom of the refrigerant outlet.

16. The water tank structure of claim 14 or 15, further comprising a buckle, and at least one end of the elastic member is connected to the first header or the second header through the buckle.

17. The water tank structure of claim 16, wherein at least one end of the elastic member is provided with a snap hook, the buckle comprises a bayonet and a connection arm, the bayonet is snapped to the first header, the connection arm extends between the first header and the second header, a snap hole is provided at the connection arm, and the snap hole is matched with the snap hook to form a snap connection.

18. The water tank structure of any of claims 11 to 17, further comprising multiple wall-mounted components, wherein the multiple wall-mounted components are provided at an outer wall surface of the inner tank between the first header and the second header, and the multiple wall-mounted components are arranged at an interval along a height direction of the inner tank.

19. The water tank structure of any of claims 11 to 18, further comprising a housing, wherein the housing is covered at an outer circumferential side of the inner tank, and the first header, the second header and the microchannels are provided between the inner tank and the housing.

20. A heat pump water heater, comprising a water tank structure of any of claims 11 to 19.

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