Water tank assembly and heat pump water heater

Abstract

The utility model relates to the field of water heaters, and provides a water tank assembly and a heat pump water heater, the water tank assembly comprises an inner container, an outer shell and a lower end cover, the outer shell is in a barrel shape with at least the lower end open, the outer shell covers the outer side of the inner container, and a foaming cavity is formed between the outer shell and the inner container; the lower end cover is arranged at an opening in the lower end of the shell, no less than two foaming holes are formed in the lower end cover, the foaming holes correspond to the foaming cavity, and the foaming holes are located above the foaming cavity. According to the heat-pump water heater, the at least two foaming holes are formed in the lower end plate, multi-position foaming is achieved, the injection efficiency of foaming liquid and the foaming uniformity are improved, the inner container is evenly wrapped by the foaming layer, and the overall heat preservation effect of the heat-pump water heater is improved. And the foaming hole is opposite to the foaming cavity and is positioned above the foaming cavity, so that the foaming liquid injected into the foaming hole more smoothly enters the foaming cavity, and the foaming reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a water tank 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, in the production process of existing electric water heaters, the insulation foam layer is mostly formed by vertical injection. When the heat pump water heater is placed vertically for foaming, the injection distribution of the foaming material is uneven, which makes the insulation foam layer of the heat pump water heater foam unevenly, resulting in poor overall insulation effect of the heat pump water heater. 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 water tank assembly, in which no less than two foaming holes are arranged on the lower end plate to achieve multi-position foaming, improve the injection efficiency of the foaming liquid and improve the uniformity of the foaming, so that the foaming layer uniformly wraps the inner tank, thereby improving the overall thermal insulation effect of the heat pump water heater. In addition, since the foaming hole is opposite to the foaming cavity and is located above the foaming cavity, the foaming liquid injected into the foaming hole enters the foaming cavity more smoothly, thereby improving the reliability of the foaming and the assembly efficiency.

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

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

[0007] Liner;

[0008] An outer shell, the outer shell is in a cylindrical shape with at least a lower end open, the outer shell is disposed on the outer side of the inner shell, and a foaming cavity is formed between the outer shell and the inner shell;

[0009] The lower end cover is arranged at the lower end opening of the shell, and the lower end cover is provided with no less than two foaming holes, the foaming holes are arranged corresponding to the foaming cavity, and the foaming holes are located above the foaming cavity.

[0010] According to an embodiment of the utility model, no less than two foaming holes are symmetrically distributed along the circumference of the lower end cover.

[0011] According to an embodiment of the utility model, the lower end cover is provided with an extension cylinder portion corresponding to the foaming hole, and the extension cylinder portion extends from the lower end cover toward the foaming cavity.

[0012] According to an embodiment of the present invention, the foaming material enters the foaming cavity through the foaming holes and foams to form a foaming layer, and the thickness of the foaming layer is greater than or equal to 20 mm and less than or equal to 45 mm.

[0013] According to one embodiment of the utility model, the water tank assembly also includes a top bubble blocking piece, which is arranged at one end of the inner tank away from the lower end cover, and the middle part of the top bubble blocking piece is recessed toward the side away from the inner tank to form a heat preservation cavity.

[0014] According to an embodiment of the utility model, a plurality of protrusions are provided on the side of the top bubble blocking member facing the inner tank, the plurality of protrusions are in contact with the inner tank, a foaming inlet is formed between two adjacent protrusions, and the foaming inlet connects the foaming cavity and the insulation cavity.

[0015] According to one embodiment of the utility model, the outer shell is cylindrical with openings at both ends, and the water tank assembly also includes an upper end cover, which is arranged on the side of the top bubble blocking member away from the inner tank, and the upper end cover blocks the upper end opening of the outer shell.

[0016] According to one embodiment of the utility model, the water tank assembly also includes a bottom bubble blocking member, a connecting port is provided in the middle of the lower end cover, the bottom bubble blocking member is arranged around a side of the connecting port close to the inner tank, and the bottom bubble blocking member is arranged in contact with the bottom of the inner tank.

[0017] According to an embodiment of the present invention, the foaming holes are circular holes, square holes, elliptical holes or waist-shaped holes.

[0018] The utility model also proposes a heat pump water heater, which includes a water tank assembly as described above, wherein the water tank assembly includes an inner tank, an outer shell and a lower end cover, wherein the outer shell is cylindrical with at least a lower end opening, the outer shell cover is arranged on the outer side of the inner tank, and a foaming cavity is formed between the outer shell and the inner tank; the lower end cover is arranged at the lower end opening of the outer shell, and the lower end cover is provided with no less than two foaming holes, the foaming holes are arranged corresponding to the foaming cavity, and the foaming holes are located above the foaming cavity.

[0019] The above one or more technical solutions in the embodiments of the utility model have at least one of the following technical effects:

[0020] The present application sets at least two foaming holes on the lower end cover. At the same time, the foaming holes correspond to the foaming cavity and are located above the foaming cavity. Due to the installation process requirements of the heat pump water heater, the water tank assembly in the present application needs to be inverted during the assembly process so that the lower end cover is placed above the water tank assembly. Therefore, the foaming holes set on the lower end cover are located above the foaming cavity, and the foaming liquid is injected from top to bottom, so that the foaming liquid foams from bottom to top. At least two foaming holes are set on the lower end plate to achieve multi-position foaming, improve the injection efficiency of the foaming liquid, and improve the uniformity of foaming, so that the foaming layer evenly wraps the inner tank, thereby improving the overall thermal insulation effect of the heat pump water heater. And because the foaming hole is opposite to the foaming cavity and is located above the foaming cavity, the foaming liquid injected into the foaming hole enters the foaming cavity more smoothly, thereby improving the reliability of foaming and the assembly efficiency.

[0021] 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

[0022] 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.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a heat pump water heater provided by the utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the structure of a heat pump water heater without the outer shell;

[0025] Figure 3 yes Figure 2 A schematic diagram of the structure of a heat pump water heater without the head assembly;

[0026] Figure 4 yes Figure 1 Cross-sectional view of the grey water tank structure.

[0027] Reference numerals:

[0028] 10. Heat pump water heater;

[0029] 100. Water tank assembly;

[0030] 110, liner;

[0031] 120, housing; 121, foaming cavity; 122, upper end opening; 123, lower end opening;

[0032] 130, lower end cover; 131, foaming hole; 132, extension tube; 133, connection port;

[0033] 140, top foam blocking member; 141, heat preservation chamber; 142, protrusion; 143, foaming inlet;

[0034] 150, upper end cover;

[0035] 160, bottom bubble blocking parts;

[0036] 200. Machine head assembly. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] However, in the production process of existing electric water heaters, the insulation foam layer is mostly formed by vertical injection. When the heat pump water heater is placed vertically for foaming, the injection distribution of the foaming material is uneven, which makes the insulation foam layer of the heat pump water heater foam unevenly, resulting in poor overall insulation effect of the heat pump water heater.

[0044] The utility model provides a water tank component and a heat pump water heater.

[0045] In the utility model embodiment, refer to Figures 1 to 4The water tank assembly 100 includes an inner tank 110, an outer shell 120 and a lower end cover 130. The outer shell 120 is cylindrical with at least a lower end opening 123. The outer shell 120 is covered on the outer side of the inner tank 110, and a foaming cavity 121 is formed between the outer shell 120 and the inner tank 110; the lower end cover 130 is arranged at the lower end opening 123 of the outer shell 120, and at least two foaming holes 131 are provided on the lower end cover 130. The foaming holes 131 are arranged corresponding to the foaming cavity 121, and the foaming holes 131 are located above the foaming cavity 121.

[0046] In the embodiment of the utility model, the inner tank 110 is the core part of the water tank, and the inner tank 110 is responsible for storing liquid. As required, the inner tank 110 can be designed into different shapes and sizes to meet the requirements of different capacities. The main function of the outer shell 120 is to protect the inner tank 110 and provide support and structure for the outside of the water tank.

[0047] The outer shell 120 is in a cylindrical shape with at least a lower opening 123, so that the inner liner 110 or other components such as bubble blocking components can be installed in the outer shell 120. Of course, the outer shell 120 can also be a cylindrical structure with both ends open. When both ends are open, the outer shell 120 includes a lower opening 123 and an upper opening 122, which further facilitates the assembly of the water tank assembly 100. The foaming cavity 121 is located between the inner liner 110 and the outer shell 120. The function of the foaming cavity 121 is to form a foaming layer by injecting a foaming liquid during the assembly process of the water tank assembly 100, so as to improve the heat preservation ability of the inner liner 110, prevent the heat in the inner liner 110 from dissipating, and improve the overall heat preservation effect.

[0048] The lower end cover 130 is arranged at the lower end opening 123 of the housing 120, and its function is to close the lower end of the water tank to prevent liquid leakage. The lower end cover 130 is provided with no less than two foaming holes 131, and the function of these foaming holes 131 is to allow the foaming liquid to enter the foaming cavity 121 when the foaming liquid is foamed. The foaming holes 131 are arranged corresponding to the foaming cavity 121, and their function is to conveniently and quickly send the foaming liquid to the corresponding bottom of the foaming cavity 121, thereby improving the injection efficiency, injection effectiveness and uniformity of the foaming liquid. At the same time, the foaming holes 131 are located above the foaming cavity 121 to ensure that the foaming liquid enters the foaming cavity 121, then flows into the bottom of the foaming cavity 121, and then foams upward, thereby improving the uniformity of foaming.

[0049] The present application sets at least two foaming holes 131 on the lower end cover 130. At the same time, the foaming holes 131 are set corresponding to the foaming cavity 121, and the foaming holes 131 are located above the foaming cavity 121. Due to the installation process requirements of the heat pump water heater 10, the water tank assembly 100 in the present application needs to be inverted during the assembly process so that the lower end cover 130 is placed above the water tank assembly 100. Therefore, the foaming holes 131 set on the lower end cover 130 are located above the foaming cavity 121, and the foaming liquid is injected from top to bottom, so that the foaming liquid foams from bottom to top. At least two foaming holes 131 are set on the lower end plate to achieve multi-position foaming, improve the injection efficiency of the foaming liquid, and improve the uniformity of the foaming, so that the foaming layer evenly wraps the inner tank 110, and improves the overall thermal insulation effect of the heat pump water heater 10. Furthermore, since the foaming holes 131 are opposite to the foaming cavity 121 and are located above the foaming cavity 121 , the foaming liquid injected into the foaming holes 131 can enter the foaming cavity 121 more smoothly, thereby improving the foaming reliability and assembly efficiency.

[0050] Reference Figures 2 to 4 According to an embodiment of the utility model, no less than two foaming holes 131 are symmetrically distributed along the circumference of the lower end cover 130. It can be understood that the foaming holes 131 are symmetrically distributed along the circumference of the lower end cover 130, so that the foaming liquid can be more evenly injected into the foaming cavity 121, thereby ensuring the thermal insulation effect of the liner 110. To ensure that each hole can be evenly equipped with enough foaming liquid, to avoid the uneven distribution of the foaming liquid in the foaming cavity 121 due to the asymmetric setting of the foaming holes 131, resulting in the foaming layer formed by foaming having an unknown thickness. This embodiment improves the uniformity of the foaming liquid injection and the reliability of the foaming of the foaming layer by symmetrically arranging the foaming holes 131.

[0051] Reference Figure 4 According to an embodiment of the utility model, the lower end cover 130 is provided with an extension cylinder 132 corresponding to the foaming hole 131, and the extension cylinder 132 extends from the lower end cover 130 toward the foaming cavity 121. It can be understood that in this embodiment, the extension cylinder 132 mainly plays a guiding role, that is, when the foaming liquid is injected, the extension cylinder 132 can be used as a guide for the foaming liquid to enter the foaming cavity 121, ensuring that the foaming liquid can enter the foaming cavity 121 along the set path, which can reduce the resistance and fluctuation of the liquid during the injection process, thereby improving the stability and uniformity of the foaming liquid entering the foaming cavity 121. This helps to ensure that the foaming liquid can fully fill the entire foaming cavity 121 and improve the foaming effect and quality.

[0052] According to an embodiment of the utility model, the foaming material enters the foaming cavity 121 through the foaming hole 131 and foams to form a foaming layer, and the thickness of the foaming layer is greater than or equal to 20 mm and less than or equal to 45 mm. It can be understood that the thickness of the foaming layer is positively correlated with the heat preservation effect of the box assembly on the inner tank 110, but if the foaming layer is too thick, it will affect the overall volume of the heat pump water heater 10. Therefore, the present application limits the thickness of the foaming layer to greater than or equal to 20 mm and less than or equal to 45 mm, so that while ensuring the heat preservation effect, it can also prevent the volume of the water tank assembly 100 from being too large. Optionally, the thickness of the foaming layer can be 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 42mm, 43mm, 44mm or 45mm, etc., and can be selected according to specific process requirements, such as the size or material of the water tank, etc., and is not particularly limited here.

[0053] Reference Figures 2 to 4 According to an embodiment of the utility model, the water tank assembly 100 further includes a top bubble blocking member 140, which is disposed at one end of the inner tank 110 away from the lower end cover 130, and the middle portion of the top bubble blocking member 140 is recessed toward the side away from the inner tank 110 to form a heat preservation chamber 141. It can be understood that the provision of the bubble blocking member can effectively prevent the foaming agent from squeezing the end cover during foaming, causing the end cover to deform. At the same time, the bubble blocking member can also play a role in heat insulation and can also support the inner tank 110. However, due to the limitation of the material of the bubble blocking member itself, its heat preservation effect is relatively poor. Therefore, in this embodiment, a heat preservation chamber 141 is recessed between the top bubble blocking member and the inner tank 110, and the foaming liquid can enter the heat preservation chamber 141 through the foaming chamber 121, and a foaming layer is formed in the heat preservation chamber 141, thereby enhancing the heat preservation ability of the top bubble blocking member 140 to the inner tank 110 and improving the overall heat preservation effect.

[0054] Reference Figure 2 and Figure 3According to one embodiment of the utility model, a plurality of protrusions 142 are provided on the side of the top bubble blocking member 140 facing the inner tank 110, and the plurality of protrusions 142 abut against the inner tank 110, and a foaming inlet 143 is formed between two adjacent protrusions 142, and the foaming inlet 143 connects the foaming chamber 121 and the heat preservation chamber 141. It can be understood that by providing a plurality of protrusions 142 on the top bubble blocking member 140, the stability of the abutment between the top bubble blocking member 140 and the inner tank 110 can be enhanced, and the protrusions 142 can be closely abutted against the inner tank 110, thereby reducing the rigid contact between the surfaces, thereby effectively buffering the inner tank 110 and improving the reliability of the water tank assembly 100. By forming the foaming inlet 143 between the protrusions 142, the flow path of the foaming liquid can be optimized. The foaming liquid can enter the heat preservation chamber 141 from the foaming chamber 121 through the foaming inlet 143. The foaming liquid is more evenly distributed on the surface of the inner liner 110, thereby improving the coverage of the inner liner 110. Since the foaming liquid can enter the heat preservation cavity 141 through the foaming inlet 143, a uniform foaming layer can be easily formed in the heat preservation cavity 141, thereby improving the heat preservation effect.

[0055] Reference Figure 1 and Figure 4 According to an embodiment of the utility model, the shell 120 is a cylindrical setting with openings at both ends, and the water tank assembly 100 further includes an upper end cover 150, which is arranged on the side of the top bubble blocking member 140 away from the inner tank 110, and the upper end cover 150 blocks the upper end opening 122 of the shell 120. It can be understood that by setting the shell 120 as a cylindrical setting with openings at both ends, the assemblability of the shell 120 can be improved, and the process difficulty can be reduced. At the same time, by setting the upper end cover 150, the integrity of the shell 120 can be improved. In addition, the blocking of the upper end cover 150 can also improve the heat preservation effect of the water tank assembly 100 and reduce the heat loss. The upper end cover 150 is arranged on the side of the top bubble blocking member 140 away from the inner tank 110, which can play a certain supporting role for the top bubble blocking member 140 and provide the structural strength of the end of the shell 120.

[0056] Reference Figure 3 and Figure 4According to an embodiment of the utility model, the water tank assembly 100 further includes a bottom bubble blocking member 160, a connection port 133 is provided in the middle of the lower end cover 130, and the bottom bubble blocking member 160 is arranged around the side of the connection port 133 close to the inner tank 110, and the bottom bubble blocking member 160 is arranged in contact with the bottom of the inner tank 110. It can be understood that the connection port 133 is provided in the middle of the lower end cover 130, so as to facilitate the connection of the inlet and outlet pipes with the inner tank 110, and other components with the inner tank 110, and in order to make the foaming chamber 121 a relatively independent foaming chamber 121, and prevent the foaming liquid from leaking and contaminating other components, the bottom bubble blocking member 160 is provided at the connection port 133, so that the sealing and stability of the water tank assembly 100 and the convenience of installation and maintenance are improved through the arrangement of the bottom bubble blocking member 160 and the connection port 133, and the normal use of the water tank assembly 100 is ensured.

[0057] According to an embodiment of the present invention, the foaming hole 131 is a circular hole, a square hole, an elliptical hole or a waist-shaped hole. It is understandable that the shape of the foaming hole 131 can be set to a shape suitable for the shape of the muzzle of the foaming gun, such as a circular hole, a square hole, an elliptical hole or a waist-shaped hole, and can be set as needed to improve the injection efficiency of the foaming agent and improve the uniformity of the foaming agent injection.

[0058] The utility model also provides a heat pump water heater 10, which includes an inner tank 110, an outer shell 120 and the above-mentioned wall-mounted mounting assembly, wherein the specific structure of the wall-mounted mounting assembly refers to the above-mentioned embodiment; it can be understood that since the above-mentioned wall-mounted mounting assembly 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 wall-mounted mounting assembly, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0059] Specifically, in the embodiment of the utility model, the heat pump water heater 10 includes a head assembly 200, an inner tank 110, an outer shell 120, an end cover, a heating assembly, a wall-mounted assembly and a heat pump system, etc. The outer shell 120 has a cavity and an opening inside, and the end cover is closed at the opening. The inner tank 110 and the heat pump system are both located in the outer shell 120. The inner tank 110 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 110, and the outer shell 120 plays a protective role for the inner tank 110 and the heat pump system. The inner tank 110 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 precisely 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 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 through a refrigerant inlet pipe, the refrigerant outlet of the condenser component is connected to the air inlet of the evaporator through a refrigerant outlet pipe, 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 from 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 through the refrigerant inlet pipe. The high-temperature and high-pressure gaseous refrigerant directly or indirectly exchanges heat with the water in the inner tank 110 in the condenser assembly, so that the temperature of the water in the inner tank 110 is increased. Thereafter, the refrigerant flowing out of the condenser assembly is transported to the throttling device through the refrigerant outlet pipe. 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.

[0060] 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 water tank assembly, characterized in that: include: Liner; An outer shell, the outer shell is in a cylindrical shape with at least a lower end open, the outer shell is disposed on the outer side of the inner shell, and a foaming cavity is formed between the outer shell and the inner shell; The lower end cover is arranged at the lower end opening of the shell, and the lower end cover is provided with no less than two foaming holes, the foaming holes are arranged corresponding to the foaming cavity, and the foaming holes are located above the foaming cavity.

2. The water tank assembly according to claim 1, characterized in that: At least two of the foaming holes are symmetrically distributed along the circumference of the lower end cover.

3. The water tank assembly according to claim 2, characterized in that: The lower end cover is provided with an extension cylinder portion corresponding to the foaming hole, and the extension cylinder portion extends from the lower end cover toward the foaming cavity.

4. The water tank assembly according to claim 1, characterized in that: The foaming material enters the foaming cavity through the foaming holes and foams to form a foaming layer. The thickness of the foaming layer is greater than or equal to 20 mm and less than or equal to 45 mm.

5. The water tank assembly according to any one of claims 1 to 4, characterized in that: The water tank assembly also includes a top bubble blocking piece, which is arranged at one end of the inner tank away from the lower end cover, and the middle part of the top bubble blocking piece is recessed toward a side away from the inner tank to form a heat preservation cavity.

6. The water tank assembly according to claim 5, characterized in that: A plurality of protrusions are arranged on the side of the top foam blocking member facing the inner container, the plurality of protrusions are in contact with the inner container, a foaming inlet is formed between two adjacent protrusions, and the foaming inlet communicates with the foaming cavity and the heat preservation cavity.

7. The water tank assembly according to claim 5, characterized in that: The shell is in a cylindrical shape with openings at both ends. The water tank assembly also includes an upper end cover, which is arranged on a side of the top bubble blocking member away from the inner tank, and the upper end cover blocks the upper end opening of the shell.

8. The water tank assembly according to any one of claims 1 to 4, characterized in that: The water tank assembly also includes a bottom bubble blocking member, a connecting port is provided in the middle of the lower end cover, the bottom bubble blocking member is arranged around a side of the connecting port close to the inner tank, and the bottom bubble blocking member is arranged in contact with the bottom of the inner tank.

9. The water tank assembly according to any one of claims 1 to 4, characterized in that: The foaming holes are circular holes, square holes, elliptical holes or waist-shaped holes.

10. A heat pump water heater, characterized in that: It comprises a head assembly and a water tank assembly as claimed in any one of claims 1 to 9.

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