Integrated water tank, waterway module and heat pump waterway system

Abstract

The utility model discloses an integrated water tank, a waterway module and a heat pump waterway system, the integrated water tank is applied to the heat pump waterway system, the integrated water tank comprises a water tank body and an air bag assembly, a hollow water storage cavity is formed in the water tank body, and the water tank body is further provided with a water inlet and a water outlet which are respectively communicated with the water storage cavity. The air bag assembly is arranged in the water storage cavity and fixedly connected with the water tank body, the air bag assembly is provided with an air channel communicating with the outside of the water tank body, and the air bag assembly is configured to allow air inflation or deflation through the air channel. According to the integrated water tank, the water tank body and the air bag assembly are integrally designed, so that the structure of a heat pump waterway system is simplified, the integrated water tank meets the water storage requirement, the air bag assembly also plays a role in stabilizing pressure in the water storage cavity, the installation space of the system is effectively saved, the equipment is more flexible in all aspects, and the service life of the equipment is prolonged. And the device is suitable for more different occasions.

Description

Technical Field

[0001] This utility model relates to the technical field of heat pump equipment, and in particular to an integrated water tank, water circuit module and heat pump water circuit system. Background Technology

[0002] Heat pumps, as a highly efficient and energy-saving heat energy conversion device, can transfer heat energy from a low-grade heat source to a high-grade heat source, and are widely used in various occasions that require heat energy conversion.

[0003] In situations with high hot water demand, such as school dormitories, factory dormitories, and hotels, existing technologies typically employ a large-capacity water tank in the heat pump water circuit system to ensure an ample supply of hot water. Furthermore, due to factors such as water temperature changes and flow fluctuations, system pressure will fluctuate. Improper handling may lead to safety hazards such as system emptying, overflow, or overpressure. Therefore, heat pump water circuit systems usually also include an expansion tank.

[0004] However, traditional expansion tanks have a relatively complex structure, typically composed of an outer shell, inner liner, inflation valve core, mounting flange, and other materials. This complex structure not only increases the difficulty of manufacturing but also severely restricts the installation location of the expansion tank within the system. Specifically, since the expansion tank and the water tank are independent yet interconnected in the heat pump water circuit system, they need to be connected via piping. This not only increases the system's complexity but also forces the expansion tank to be installed outside the water tank, preventing high integration with the tank. This not only occupies more space but also increases the system's manufacturing and assembly costs, reducing the overall cost-effectiveness of the system. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide an integrated water tank, water circuit module and heat pump water circuit system, which can solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, an integrated water tank is provided for use in a heat pump water circuit system, the integrated water tank comprising:

[0008] The water tank body has a hollow water storage cavity inside, and the water tank body also has an inlet and an outlet that are respectively connected to the water storage cavity.

[0009] An airbag assembly is disposed within the water storage cavity and fixedly connected to the water tank body. The airbag assembly is provided with an air passage communicating with the outside of the water tank body. The airbag assembly is configured to allow inflation or deflation through the air passage.

[0010] As an optional implementation, the airbag assembly is disposed at the bottom of the water storage cavity.

[0011] As an optional implementation, the water tank body is provided with an assembly port that communicates with the water storage cavity;

[0012] The airbag assembly includes:

[0013] A first fixed flange is installed on the water tank body and surrounds the assembly port;

[0014] The second fixed flange is detachably installed on the side of the first fixed flange away from the water tank body via a connecting component;

[0015] An airbag body is disposed in the water storage cavity and is at least partially sandwiched between the first fixed flange and the second fixed flange, and an air nozzle is provided on the second fixed flange, and an air passage is formed on the air nozzle to communicate with the interior of the airbag body.

[0016] As an optional implementation, the air nozzle is located at the lower part of the water tank body.

[0017] As an optional implementation, an elastic seal is also provided between the water tank body and the first fixed flange, and the elastic seal acts on the first fixed flange through the water tank body.

[0018] As an optional implementation, the lower side of the water tank body is also provided with a drain port that connects to the water storage chamber.

[0019] Secondly, a waterway module is provided, including:

[0020] Integrated water tanks as described in the first aspect;

[0021] The installation box has a hollow cavity inside, the integrated water tank is placed in the cavity, and the installation box is provided with multiple heat exchangers extending along the height direction on the cavity wall of the cavity.

[0022] A water pump is located at the bottom of the accommodating cavity and connected to the water inlet via a pipeline.

[0023] As an optional implementation, the mounting box has an opening extending along the height direction on one side, and the mounting box is provided with a door that can be detachably covered by the opening.

[0024] As an optional implementation, the top of the water tank body is also provided with a water supply pipe that communicates with the water storage chamber, and the water supply pipe extends to the outside of the mounting box;

[0025] The water supply pipe is also equipped with a pressure relief valve and an air vent valve.

[0026] Thirdly, a heat pump water circuit system is provided, including:

[0027] The waterway module as described in the second aspect.

[0028] The beneficial effects of this utility model are as follows: The integrated water tank adopts an integrated design of the water tank body and the air bladder assembly, which simplifies the structure of the heat pump water circuit system. The integrated water tank not only meets the water storage requirements, but the air bladder assembly also plays a role in stabilizing the pressure in the water storage chamber, effectively saving the installation space of the system and making the equipment more flexible in all aspects and suitable for more different occasions.

[0029] Because integrated water tanks combine the tank body with the airbag assembly, they reduce the number of materials and complex processes required by traditional expansion tanks. This not only simplifies the manufacturing process and reduces the difficulty of manufacturing, but also reduces the number of connecting parts and assembly steps during assembly, thereby reducing manufacturing and assembly costs and improving production efficiency. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the overall structure of the waterway module described in an embodiment of the present utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of the waterway module described in an embodiment of the present invention;

[0033] Figure 3 This is a cross-sectional view of the waterway module described in an embodiment of this utility model;

[0034] Figure 4 for Figure 3 Enlarged view of part A;

[0035] Figure 5 This is one of the exploded views of the integrated water tank described in the embodiments of this utility model;

[0036] Figure 6 This is the second exploded view of the integrated water tank described in this embodiment of the present invention.

[0037] In the diagram: 10. Water tank body; 11. Water storage chamber; 12. Water inlet; 13. Water outlet; 14. Assembly port; 15. Sewage outlet; 20. Airbag assembly; 21. First fixed flange; 22. Second fixed flange; 23. Airbag body; 24. Air nozzle; 30. Elastic seal; 40. Mounting box; 41. Opening; 42. Box door; 50. Water pump. Detailed Implementation

[0038] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model are further described in detail below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] Heat pumps, as highly efficient and energy-saving heat energy conversion devices, can transfer heat energy from a low-grade heat source to a high-grade heat source, and are widely used in various occasions requiring heat energy conversion. Depending on the type of heat source, heat pumps can be divided into several types, among which air source heat pumps, water source heat pumps, and ground source heat pumps are some of the more common ones. Air source heat pump water heaters use electricity as a power source, absorbing heat from the low-temperature side to heat domestic water. The hot water is then delivered to the user's end through a distribution system to meet their hot water supply needs. Simultaneously, fan coil units can be used for heating, further expanding their application range.

[0042] As the background technology shows, in places with high hot water demand such as school dormitories, factory dormitories, and hotels, the existing technology usually adopts a solution of equipping the heat pump water circuit system (such as the air source heat pump water heater mentioned above) with a large-capacity water tank to ensure an adequate supply of hot water. However, during the operation of the heat pump water circuit system, due to factors such as changes in water temperature and fluctuations in water flow, the system pressure will fluctuate accordingly. If not handled properly, it may lead to safety hazards such as system emptying, overflow, or overpressure.

[0043] To effectively address this issue, heat pump water circuit systems typically include an expansion tank. As a crucial component for system pressure regulation, the expansion tank absorbs volume changes in the fluid due to temperature variations, maintaining stable system pressure. However, traditional expansion tanks have relatively complex structures, generally consisting of an outer shell, inner liner, inflation valve core, mounting flange, and other materials. This not only increases manufacturing difficulty but also severely restricts the installation location of the expansion tank within the system.

[0044] Specifically, since the expansion tank and the water tank are independent yet interconnected in the heat pump water circuit system, they need to be connected by pipes. This connection method not only increases the complexity of the system, but also means that the expansion tank can only be installed outside the water tank, making it impossible to achieve a high degree of integration with the water tank. This results in occupying more space, increasing the processing and assembly costs of the system, and reducing the overall cost-effectiveness of the system.

[0045] In view of this, this embodiment provides an integrated water tank, which is specifically applied to a heat pump water circuit system. It adopts an integrated design approach, setting the airbag assembly in the water tank body. Compared with the traditional heat pump water circuit system, the water tank body integrates the two into one unit. This design not only simplifies the structure, but also eliminates complex pipe connection and installation procedures, thereby solving a series of technical problems such as high complexity of equipment connection and large amount of installation space occupied by the system.

[0046] Please refer to the instruction manual attached. Figures 3-6 The integrated water tank includes a tank body 10, which is a container with a hollow structure. Its shape and size are determined according to actual application requirements, and it is usually designed as a cylinder or rectangle to facilitate manufacturing, installation and use. A hollow water storage cavity 11 is formed inside the tank body 10 to store the water required by the system. Its volume can be designed according to the scale of the heat pump water circuit system and the water consumption requirements. In addition, the water tank body 10 is provided with an inlet 12 and an outlet 13 that are respectively connected to the water storage chamber 11. The inlet 12 is used to introduce external water sources (such as tap water, well water, etc.) into the water storage chamber 11. It is usually equipped with a valve and a filter to control the water flow and filter impurities. The outlet 13 is used to output the water in the water storage chamber 11 to other parts of the heat pump system, such as the circulating pump and heat exchanger. Generally speaking, the outlet 13 is also equipped with a valve to control the water flow. By controlling the inlet 12 and the outlet 13, the water volume in the water tank body 10 can be adjusted and replenished to ensure the continuous and stable operation of the system.

[0047] In practical applications, the water tank body 10 can be installed in the heat pump water circuit system through a specific fixing structure and connected with other related equipment to ensure its stability and safety during operation. In addition, depending on actual needs, the water tank body 10 may also be equipped with additional equipment such as pressure gauges, level gauges, and temperature sensors to monitor parameters such as water pressure, level and temperature in the water storage chamber 11 to ensure the normal operation of the system.

[0048] Building upon the aforementioned structure, the integrated water tank also includes an airbag assembly 20. The airbag assembly 20 works in close conjunction with the water tank body 10 to jointly achieve the system's pressure stabilization, water storage, and pressure regulation functions. Specifically, the airbag assembly 20 generally includes an airbag body 23, which, as the core component of the airbag assembly 20, is typically made of high-quality rubber material, possessing good elasticity and durability. The airbag assembly 20 is disposed within the water storage chamber 11 and fixedly connected to the water tank body 10. The airbag assembly 20 is provided with an air passage connecting to the outside of the water tank body 10, and is configured to allow inflation or deflation through the air passage. Through its inflation and deflation processes, the airbag assembly 20 can effectively regulate the pressure within the water storage chamber 11, thereby maintaining the overall pressure stability of the heat pump water circuit system, helping to protect system components from damage, and improving the system's operating efficiency and lifespan. When the system pressure increases, the airbag assembly 20 deflates through the air passage, reducing its volume within the water tank body 10, thereby lowering the system pressure. Conversely, when the system pressure decreases, the airbag assembly 20 is inflated through the air passage, increasing its volume and raising the system pressure. This pressure regulation function helps protect other components of the heat pump water circuit system from damage caused by excessively high or low pressures, improving the system's stability and safety.

[0049] In addition, the airbag assembly 20 also has a certain buffering effect, which can absorb pressure fluctuations and shocks generated during system operation, helping to reduce the wear and failure rate of system components and improve the reliability and stability of the system.

[0050] This integrated water tank adopts an integrated design of the water tank body 10 and the airbag assembly 20. The airbag assembly 20 is set in the water tank body 10, which simplifies the structure of the heat pump water circuit system. This integrated water tank not only meets the water storage requirements, but the airbag assembly 20 also plays a role in stabilizing the pressure in the water storage chamber 11, effectively saving the installation space of the system. This compact design reduces the space occupied by the equipment and provides greater flexibility and convenience for the installation of the heat pump system. Especially in environments with limited space, it makes the system more flexible in all aspects and suitable for more different occasions.

[0051] Because the integrated water tank combines the tank body 10 with the airbag assembly 20, it reduces the number of materials and complex processes required by traditional expansion tanks. This not only simplifies the manufacturing process and reduces manufacturing difficulty, but also reduces the number of connecting parts and assembly steps during assembly, achieving efficient connections between components. This reduces manufacturing and assembly costs and improves production efficiency. Furthermore, due to the reduced number of components and simplified structure, maintenance personnel can more easily inspect and maintain the system, reducing maintenance difficulty and costs.

[0052] Please continue to refer to the instruction manual appendix. Figures 3-6 In one embodiment, the airbag assembly 20 is disposed at the bottom of the water storage chamber 11. Because the airbag assembly 20 is located at a low position within the water storage chamber 11, it can more evenly bear the pressure from the surrounding water during the use of the integrated water tank, avoiding excessive local stress on the airbag and reducing deformation, breakage, or aging of the airbag caused by uneven pressure, thereby extending the service life of the airbag assembly 20.

[0053] In addition, the airbag assembly 20, which is located at the bottom of the water storage chamber 11, can also be centrally located in the middle area of ​​the water tank body 10. The water around it acts evenly on the airbag assembly 20, enabling the airbag assembly 20 to respond to changes in system pressure more quickly, reducing the transmission delay in the pressure regulation process, and improving the system's response speed and regulation efficiency.

[0054] In order to facilitate the assembly of the airbag assembly 20 on the water tank body 10, the water tank body 10 is provided with an assembly port 14 that connects to the water storage cavity 11. The assembly port 14 not only facilitates the installation of the airbag assembly 20, but also provides operating space for subsequent airbag maintenance, replacement or repair.

[0055] As a specific structural form of the airbag assembly 20, such as Figures 3-6 As shown, the airbag assembly 20 includes a first fixing flange 21 and a second fixing flange 22. The first fixing flange 21 is installed on the water tank body 10 and surrounds the assembly port 14, serving as a fixed connection between the airbag assembly 20 and the water tank body 10, providing stable support and sealing. The second fixing flange 22 is detachably installed on the side of the first fixing flange 21 facing away from the water tank body 10 via a connecting component. This detachable connection makes maintenance, replacement, or repair of the airbag assembly 20 more convenient.

[0056] It is understood that the connecting component, as the connection medium between the second fixed flange 22 and the first fixed flange 21, can be assembled in actual assembly scenarios by means of, but not limited to, bolt and nut combination, quick locking device (usually including a locking ring and a locking groove that cooperates with it), clamp connection, etc. The specific assembly method adopted depends on the specific application scenario and requirements, and this embodiment does not impose strict limitations or requirements here.

[0057] As can be seen from the above, the airbag assembly 20 also includes an airbag body 23, which is disposed in the water storage cavity 11 and is at least partially sandwiched between the first fixed flange 21 and the second fixed flange 22, so that the airbag body 23 can maintain a stable shape and position during the inflation and deflation process.

[0058] When it is necessary to replace the airbag body 23, the operator can remove the second fixing flange 22 to detach the airbag body 23 from the first fixing flange 21 and the second fixing flange 22 without disassembling the first fixing flange 21. This ensures that the assembly strength between the airbag body 23 and the water tank body 10 will not change when the airbag body 23 is reassembled into the water tank body 10, thus ensuring the stability of the fit between the airbag assembly 20 and the water tank body 10.

[0059] Following the above embodiment, an air nozzle 24 is provided on the second fixed flange 22, and an air passage is formed on the air nozzle 24 to communicate with the interior of the airbag body 23, so as to realize the inflation or deflation function of the airbag body 23.

[0060] like Figures 3-6 As shown, in one embodiment, the air nozzle 24 is located at the lower part of the water tank body 10. In the above solution, placing the air nozzle 24 at the lower part of the water tank body 10, making it closer to the bottom of the water storage chamber 11, allows gas to be more easily discharged or entered from the bottom of the water tank body 10 when it is necessary to inflate or deflate the airbag assembly 20, which helps to improve the inflation and deflation efficiency and allows the airbag assembly 20 to reach the required pressure state more quickly.

[0061] In the above-mentioned scheme where the airbag assembly 20 is located at the bottom of the water storage chamber 11, the air nozzle 24 is located at the lower part of the water tank body 10. This layout allows the airbag assembly 20 to be more integrated, allowing the gas to enter the airbag body 23 more quickly after passing through the air nozzle 24, or to be discharged from the airbag body 23 more quickly after passing through the air nozzle 24, making the gas inflation and deflation process more efficient.

[0062] In addition, the airbag assembly 20 and the air nozzle 24 are both located at the bottom of the water tank, so that maintenance personnel do not need to climb or enter the water storage chamber 11 when performing inflation / deflation operations or repairing the airbag. They can simply operate from the bottom of the water tank, which greatly reduces the difficulty and risk of maintenance and improves work efficiency and safety.

[0063] In addition to the airbag assembly 20, which includes a first fixed flange 21, a second fixed flange 22, and an airbag body 23, an elastic sealing element 30 is also provided between the water tank body 10 and the first fixed flange 21. The elastic sealing element 30 acts on the first fixed flange 21 through the water tank body 10. The elastic sealing element 30 can fit tightly between the water tank body 10 and the first fixed flange 21, forming an effective sealing layer, which helps to prevent water leakage in the water storage chamber 11 and ensures the normal operation and safety of the system.

[0064] In addition, the elastic seal 30 has good elasticity and flexibility. When it is assembled between the first fixed flange 21 and the water tank body 10, it can adapt to the deformation, vibration and even relative displacement that occur between the water tank body 10 and the airbag assembly 20, and maintain the stability of the seal.

[0065] The elastic seal 30 can also disperse the contact stress between the water tank body 10 and the first fixed flange 21, reduce stress concentration, help extend the service life of the water tank body 10 and the first fixed flange 21, and reduce the risk of cracks or damage caused by stress concentration.

[0066] In one embodiment, a drain port 15 communicating with the water storage chamber 11 is provided on the lower side of the water tank body 10, so that dirt, sediment or residue in the water storage chamber 11 can be discharged more easily, thereby improving the maintenance efficiency of the equipment.

[0067] like Figures 1-3 As shown, this embodiment also provides a water circuit module, which adopts the integrated water tank and mounting box 40 provided in any of the above embodiments. The mounting box 40 has a hollow accommodating cavity inside, and the integrated water tank is disposed in the accommodating cavity. Furthermore, the mounting box 40 has multiple heat exchangers extending along the height direction arranged on the cavity wall of the accommodating cavity. These heat exchangers can effectively utilize thermal energy for heat exchange, thereby increasing the temperature of the water stored in the water storage cavity 11. In other words, the mounting box 40 not only provides a stable installation environment for the integrated water tank, but also realizes the recovery and utilization of thermal energy through its internal heat exchangers, which helps to reduce the energy consumption of the system and improve the overall energy efficiency level.

[0068] In practical applications, heat exchangers can be, but are not limited to, plate heat exchangers, shell-and-tube heat exchangers, spiral plate heat exchangers, etc. This implementation does not impose strict limitations or requirements on them.

[0069] In addition, the water circuit module also includes a water pump 50, which is located at the bottom of the accommodating cavity and connected to the water inlet 12 through a pipeline. It is responsible for introducing external water sources into the water circuit module to provide a stable water flow for the system.

[0070] This water circuit module integrates multiple components, including an integrated water tank, mounting box 40, and water pump 50, into a compact and efficient whole. This reduces the number and length of external piping, lowering system complexity and maintenance costs. Furthermore, through the heat exchanger inside the mounting box 40 for heat recovery and utilization, and the precise control of the water pump 50, this water circuit module boasts high energy efficiency, contributing to reduced system energy consumption and operating costs.

[0071] Based on the above implementation method, an opening 41 extending along the height direction is provided on one side of the installation box 40, which can provide enough space to accommodate and install integrated water tanks with a large height, making the internal layout of the installation box 40 more flexible. Operators can also easily operate the components inside the installation box 40 through the opening 41 to install, debug, repair or replace them.

[0072] Furthermore, the mounting box 40 is also equipped with a detachable door 42 that covers the opening 41. Operators can easily close or open the door 42 as needed to protect the internal components or perform related operations. The opening 41, which is opened along the height of the mounting box 40, not only considers the detachability of the door 42, but also ensures that when the door 42 is removed, the entire water tank body 10 and the air nozzle 24 located at the bottom can be fully exposed, providing operators with sufficient space for various operations. This avoids operational difficulties caused by insufficient size or improper placement of the opening 41, and ensures that operators can clearly see and access all components that need to be operated.

[0073] As a further embodiment, a water supply pipe is also provided on the top of the water tank body 10, which is connected to the water storage cavity 11. The water supply pipe extends to the outside of the mounting box 40 and is directly connected to the water storage cavity 11 of the water tank body 10. This makes it convenient to add water to the water storage cavity 11 through the water supply pipe when water needs to be replenished.

[0074] The water supply pipe is also equipped with a pressure relief valve and an air vent valve. The pressure relief valve, as a safety device, automatically releases some pressure when the system pressure becomes too high and exceeds the withstand range of the airbag assembly 20, preventing damage to the system due to excessive pressure. The air vent valve is used to remove air from the system, preventing air accumulation and ensuring normal system operation.

[0075] This embodiment also provides a heat pump water circuit system, which adopts the water circuit module provided in any of the above embodiments, thereby improving the overall integration of the system and making it suitable for more different places.

[0076] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0077] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0079] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. An integrated water tank characterized by, The integrated water tank, used in heat pump water systems, includes: The water tank body (10) has a hollow water storage cavity (11) inside. The water tank body (10) is also provided with an inlet (12) and an outlet (13) that are respectively connected to the water storage cavity (11). An airbag assembly (20) is disposed in the water storage cavity (11) and fixedly connected to the water tank body (10). The airbag assembly (20) is provided with an air passage that communicates with the outside of the water tank body (10). The airbag assembly (20) is configured to allow inflation or deflation through the air passage.

2. The integrated water tank of claim 1, wherein, The airbag assembly (20) is located at the bottom of the water storage chamber (11).

3. The integrated water tank of claim 1, wherein, The water tank body (10) is provided with an assembly port (14) that connects to the water storage cavity (11); The airbag assembly (20) includes: A first fixed flange (21) is installed on the water tank body (10) and surrounds the assembly port (14); The second fixed flange (22) is detachably installed on the side of the first fixed flange (21) away from the water tank body (10) via a connecting component; The airbag body (23) is disposed in the water storage cavity (11) and is at least partially sandwiched between the first fixed flange (21) and the second fixed flange (22), and the second fixed flange (22) is provided with an air nozzle (24), and the air nozzle (24) has an air passage that communicates with the interior of the airbag body (23).

4. The integrated water tank of claim 3, wherein, The air nozzle (24) is located at the lower part of the water tank body (10).

5. The integrated water tank of claim 3, wherein, An elastic sealing element (30) is also provided between the water tank body (10) and the first fixed flange (21), and the elastic sealing element (30) acts on the first fixed flange (21) through the water tank body (10).

6. The integrated water tank of claim 1, wherein, The lower side of the water tank body (10) is also provided with a drain port (15) that connects to the water storage chamber (11).

7. A waterway module characterized by, include: Integrated water tank as described in any one of claims 1-6; The mounting box (40) has a hollow accommodating cavity inside, the integrated water tank is set in the accommodating cavity, and the mounting box (40) is provided with a plurality of heat exchangers extending along the height direction on the cavity wall of the accommodating cavity. A water pump (50) is located at the bottom of the accommodating cavity and connected to the water inlet (12) via a pipeline.

8. The waterway module of claim 7, wherein, The mounting box (40) has an opening (41) extending along the height direction on one side, and the mounting box (40) is provided with a box door (42) that is detachably covered by the opening (41).

9. The waterway module of claim 7, wherein, The top of the water tank body (10) is also provided with a water supply pipe that connects to the water storage chamber (11), and the water supply pipe extends to the outside of the mounting box (40); The water supply pipe is also equipped with a pressure relief valve and an air vent valve.

10. A heat pump water circuit system characterized by comprising: include: The waterway module as described in any one of claims 7-9.

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