Water storage tank for air source heat pump and control method of water storage tank

Abstract

The invention relates to the technical field of air source heat pumps, in particular to a water storage tank for an air source heat pump and a control method of the water storage tank. By arranging the first water storage cavity, the second water storage cavity and the third water storage cavity which are sequentially arranged from inside to outside, hot water introduced from the outside is stored in the first water storage cavity on the innermost layer, and then is sequentially supplemented into the water storage cavity on the outer layer from the water storage cavity on the inner layer through liquid level changes of the water storage cavities; due to the fact that the contact area between the third water storage cavity located on the outer side and the inner wall of the tank body is large, under the effect of the external room temperature difference, the water temperature in the third water storage cavity is decreased faster than the water temperature in the inner layer water storage cavity, and therefore the water temperatures in the first water storage cavity, the second water storage cavity and the third water storage cavity can form gradient water temperatures which are decreased in sequence. In this way, direct heat exchange between the first water storage cavity on the inner layer and the outside room temperature is avoided, the energy loss of the air energy heat pump can be reduced through combination of the scheme, and the requirements of users for instant use at different water temperatures are met.

Description

Technical Field

[0001] The present invention relates to the technical field of air source heat pumps, and in particular to a water storage tank for an air source heat pump and a control method thereof. Background Art

[0002] The air source heat pump water storage tank plays a vital role in the system. Its main purpose is to extend the life of the equipment, reduce energy consumption, and improve system stability and efficiency. By increasing the water capacity of the system, the water storage tank can effectively store cold and hot energy and reduce the frequent startup of the host, thereby achieving the purpose of energy saving and electricity saving.

[0003] The structure of the air source heat pump water storage tank in the prior art is usually an integral accommodating cavity structure. For example, a Chinese patent with authorization announcement number CN116002244B discloses a water storage tank for an air source heat pump, in which there is only one water storage cavity. When the tank body is depressurized, although the hot steam in the tank can be stored in the pressure tank, the gas in the pressure tank can be sucked back when the water is released to reduce the heat energy consumption, but the hot steam is limited by the thermal insulation performance of the pressure tank during storage in the pressure tank. The heat energy consumption is large during the storage process, resulting in a large heat energy loss when it is sucked back into the tank body. Since most of the existing air source water storage tanks control the water temperature in the tank through a temperature sensor, the water in the tank flows through the water inlet and outlet pipes through the condenser module of the air source heat pump for heat exchange and circulation heating. When the gas is sucked back into the tank body, its temperature may drop below the water temperature, which is not conducive to the insulation of hot water.

[0004] Moreover, the structure of the single water storage chamber leads to a large temperature difference between the water in the water tank and the external ambient temperature. The thermal energy of the stored water can easily be exchanged with the external heat through the heat transfer of the water storage tank body, causing the water temperature to drop rapidly. When using water, the hot water and cold water pipes in the single water storage chamber are mixed and temperature adjusted to achieve the purpose of users using warm water.

[0005] It can be seen that the air source heat pump water storage tank structure with a single water storage chamber in the prior art needs to frequently circulate the water in the water storage tank through the condenser module of the air source heat pump for heat exchange to maintain the temperature in the tank during actual use, thereby increasing energy loss. Therefore, it is urgent to improve the structure of the water storage tank for the air source heat pump and its control method to reduce the energy loss of the air source heat pump. Summary of the invention

[0006] The technical problem to be solved by the present invention is to improve the structure of a water storage tank for an air source heat pump and a control method thereof, so as to reduce the energy loss of the air source heat pump.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A water storage tank for an air source heat pump comprises a water storage tank body, the water storage tank body is in the shape of a cylinder, the water storage tank is divided into a first water storage chamber, a second water storage chamber and a third water storage chamber arranged in sequence from the inside to the outside by two annular partitions, the first water storage chamber is in the shape of a cylinder, the second water storage chamber is in the shape of a circular cylinder, and the third water storage chamber is in the shape of a circular cylinder;

[0009] The axes of the first water storage chamber, the second water storage chamber and the third water storage chamber coincide with each other;

[0010] A first temperature sensor and a first liquid level sensor are provided in the first water storage chamber;

[0011] A second temperature sensor and a second liquid level sensor are provided in the second water storage chamber;

[0012] A third temperature sensor and a third liquid level sensor are provided in the third water storage chamber;

[0013] The lower part of the first water storage chamber is connected to a hot water inlet pipe, and the hot water inlet pipe is connected to a first solenoid valve;

[0014] The first water storage chamber and the lower part of the second water storage chamber are connected through a first connecting pipe, and the first connecting pipe is connected to a second solenoid valve;

[0015] The lower parts of the second water storage chamber and the third water storage chamber are connected through a second connecting pipe, and the second connecting pipe is connected to a third solenoid valve;

[0016] The lower part of the first water storage chamber is connected to a first water outlet pipe; the lower part of the second water storage chamber is connected to a second water outlet pipe, and the lower part of the third water storage chamber is connected to a third water outlet pipe, and the first water outlet pipe, the second water outlet pipe and the third water outlet pipe are connected to the main water outlet pipe through a four-way valve;

[0017] It also includes a steam condensation water tank and a steam guide pipe, wherein the middle section of the steam guide pipe is arranged in the third water storage chamber, the upper end of the steam guide pipe passes through the second water storage chamber and is connected to the upper part of the first water storage chamber, and the lower end of the steam guide pipe passes through the outer wall of the water storage tank body and is connected to the steam condensation water tank;

[0018] It also includes a cold water pipe, the cold water pipe is connected to the water outlet main pipe, and the cold water pipe is connected to a fourth solenoid valve;

[0019] It also includes a water outlet temperature setting module, wherein the water outlet temperature setting module is used for the user to input the water outlet temperature of the main water outlet pipe according to the needs;

[0020] It also includes a PLC, which is electrically connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the four-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor, the first liquid level sensor, the second liquid level sensor, the third liquid level sensor and the water outlet temperature setting module.

[0021] Furthermore, in the above-mentioned water storage tank structure for the air source heat pump, a first opening is provided at the upper portion of the portion of the steam guide pipe located in the second water storage chamber.

[0022] Furthermore, in the above-mentioned water storage tank structure for the air source heat pump, a second opening is provided at the upper portion of the portion of the steam guide pipe located in the third water storage chamber.

[0023] Furthermore, in the above-mentioned water storage tank structure for the air source heat pump, the fourth solenoid valve is a three-way valve, the steam condensate water tank is connected to one end of the three-way valve through a fourth connecting pipe, and a fourth liquid level sensor is provided in the steam condensate water tank; the fourth liquid level sensor is electrically connected to the PLC.

[0024] Furthermore, in the above-mentioned water storage tank structure for the air source heat pump, the middle section of the steam guide pipe is coiled and arranged in the third water storage chamber.

[0025] Furthermore, in the above-mentioned water storage tank structure for the air source heat pump, the main water outlet pipe is also provided with a fourth temperature sensor, and the fourth temperature sensor is electrically connected to the PLC.

[0026] The present invention also protects a control method for the water storage tank for the air source heat pump, comprising the following steps:

[0027] Set the outlet water temperature through the outlet water temperature setting module;

[0028] If the set outlet water temperature is lower than the temperature value of the third temperature sensor, the four-way valve is controlled to adjust the third outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the third temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature;

[0029] If the set outlet water temperature is higher than the temperature value of the third temperature sensor and lower than the temperature value of the second temperature sensor, the four-way valve is controlled to adjust the second outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the second temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature;

[0030] If the set outlet water temperature is higher than the temperature value of the second temperature sensor and lower than the temperature value of the first temperature sensor, the four-way valve is controlled to adjust the first outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the first temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature;

[0031] When the third liquid level sensor detects that the liquid level in the third water storage chamber is lower than a preset threshold, the third solenoid valve is controlled to open and close after a preset time, so that the water in the second water storage chamber enters the third water storage chamber through the second connecting pipe;

[0032] When the second liquid level sensor detects that the liquid level in the second water storage chamber is lower than a preset threshold, the second solenoid valve is controlled to open and close after a preset time, so that the water in the first water storage chamber enters the second water storage chamber through the second connecting pipe;

[0033] When the first liquid level sensor detects that the liquid level in the first water storage chamber is lower than a preset threshold, the first solenoid valve is controlled to open and close after a preset time, so that the hot water heated by the air source heat pump enters the first water storage chamber through the hot water inlet pipe.

[0034] Furthermore, in the control method of the water storage tank for the above-mentioned air source heat pump, when the fourth liquid level sensor detects that the liquid level in the steam condensation water tank is higher than a preset threshold value, the three-way valve is controlled to adjust the fourth connecting pipe to be connected to the water outlet section of the cold water pipe, and the cold water in the steam condensation water tank is passed into the main water outlet pipe to adjust the water temperature.

[0035] Furthermore, the control method of the water storage tank for the air source heat pump further includes: adjusting the opening of the fourth solenoid valve according to the temperature value sensed by the fourth temperature sensor until the temperature sensed by the fourth temperature sensor reaches a preset temperature range.

[0036] The beneficial effect of the present invention is that: by setting the first water storage chamber, the second water storage chamber and the third water storage chamber structure which are arranged in sequence from the inside to the outside, the hot water introduced from the outside is stored in the first water storage chamber of the innermost layer, and then through the change of the liquid level of each water storage chamber, it is replenished from the inner water storage chamber to the outer water storage chamber in sequence. Since the third water storage chamber located on the outside has a large contact area with the inner wall of the tank body, under the effect of the temperature difference of the external room temperature, the water temperature in the third water storage chamber drops faster than the water temperature in the inner water storage chamber, so the water temperatures in the first water storage chamber, the second water storage chamber and the third water storage chamber will form a descending trend. Gradient water temperature, thus avoiding direct heat exchange between the inner first water storage chamber and the external room temperature, the temperature difference between the first water storage chamber and the second water storage chamber is small, so the water in the first water storage chamber can be kept warm for a long time. When users use water, they do not use high-temperature hot water completely, but choose to output hot water of different temperatures according to different purposes. In the prior art, hot water is usually drawn from a water tank with a single water storage chamber, and mixed with tap water close to room temperature to adjust the water temperature. Since the water temperature inside the water tank with a single water storage chamber is uniform, when the water temperature in the water tank drops to a lower temperature, high-temperature hot water cannot be used. If needed To take high-temperature water, the water in the entire water tank needs to be circulated and heated, which increases energy consumption and the waiting time of the heating process. Since the present invention has a three-layer water storage chamber structure from the inside to the outside, the water temperature gradient decreases from the inside to the outside, so that the first water tank is continuously kept warm to meet the demand for taking high-temperature water. When low-temperature water is needed, water can be mixed with water from the second water storage chamber or the third water storage chamber according to the water temperature. The water in the third water storage chamber is supplemented by the water in the second water storage chamber, and the water in the second water storage chamber is supplemented by the water in the first water storage chamber. When the water in the first water storage chamber is insufficient, , directly introduce the hot water generated by the air source heat pump into the first water storage chamber for storage. On the other hand, the steam pressure generated by the high-temperature water in the water storage tank body is guided to the steam condensation water tank through the steam guide pipe for pressure relief. During the steam diversion process, heat exchange can be carried out with the water in the third water storage chamber through the steam guide pipe, and the residual heat of the steam is fully utilized to heat the water in the third water storage chamber. The condensed water formed by the steam cooling is stored in the steam condensation water tank for standby use and used as cold water to neutralize the water temperature. The combination of the above schemes can save energy loss of air energy heat pumps and meet the user's ready-to-use needs for different water temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a water storage tank for an air source heat pump according to a specific embodiment of the present invention;

[0038] Figure 2 for Figure 1 A-direction cross-sectional view;

[0039] Description of labels:

[0040] 1. Water storage tank body; 11. First water storage chamber; 111. First temperature sensor; 112. First liquid level sensor; 113. First water outlet pipe; 12. Second water storage chamber; 121. Second temperature sensor; 122. Second liquid level sensor; 123. Second water outlet pipe; 13. Third water storage chamber; 131. Third temperature sensor; 132. Third liquid level sensor; 133. Third water outlet pipe;

[0041] 2. Hot water inlet pipe; 21. First solenoid valve;

[0042] 3. First connecting pipe; 31. Second solenoid valve;

[0043] 4. Second connecting pipe; 41. Third solenoid valve;

[0044] 5. Steam condensate water tank; 51. Steam flow guide pipe; 52. First opening; 53. Second opening; 54. Fourth liquid level sensor;

[0045] 6. Cold water pipe; 61. Fourth solenoid valve;

[0046] 7. Main water outlet pipe; 71. Four-way valve; 72. Fourth temperature sensor. DETAILED DESCRIPTION

[0047] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0048] Please refer to Figure 1 to Figure 2 The specific embodiment of the present invention relates to a water storage tank for an air source heat pump, comprising a water storage tank body 1, the water storage tank body 1 is in the shape of a cylinder, the water storage tank is divided into a first water storage chamber 11, a second water storage chamber 12 and a third water storage chamber 13 arranged sequentially from the inside to the outside by two annular partitions, the first water storage chamber 11 is in the shape of a cylinder, the second water storage chamber 12 is in the shape of a circular cylinder, and the third water storage chamber 13 is in the shape of a circular cylinder;

[0049] The axes of the first water storage chamber 11, the second water storage chamber 12 and the third water storage chamber 13 coincide with each other;

[0050] A first temperature sensor 111 and a first liquid level sensor 112 are provided in the first water storage chamber 11;

[0051] A second temperature sensor 121 and a second liquid level sensor 122 are provided in the second water storage chamber 12;

[0052] The third water storage chamber 13 is provided with a third temperature sensor 131 and a third liquid level sensor 132;

[0053] The lower part of the first water storage chamber 11 is connected to a hot water inlet pipe 2, and the hot water inlet pipe 2 is connected to a first solenoid valve 21;

[0054] The first water storage chamber 11 and the lower part of the second water storage chamber 12 are connected through a first connecting pipe 3, and the first connecting pipe 3 is connected to a second solenoid valve 31;

[0055] The lower parts of the second water storage chamber 12 and the third water storage chamber 13 are connected through a second connecting pipe 4, and the second connecting pipe 4 is connected to a third solenoid valve 41;

[0056] The lower part of the first water storage chamber 11 is connected to a first water outlet pipe 113; the lower part of the second water storage chamber 12 is connected to a second water outlet pipe 123; the lower part of the third water storage chamber 13 is connected to a third water outlet pipe 133; the first water outlet pipe 113, the second water outlet pipe 123 and the third water outlet pipe 133 are connected to the main water outlet pipe 7 through a four-way valve 71;

[0057] It also includes a steam condensation water tank 5 and a steam guide pipe 51, the middle section of the steam guide pipe 51 is arranged in the third water storage chamber 13, the upper end of the steam guide pipe 51 passes through the second water storage chamber 12 and is connected to the upper part of the first water storage chamber 11, and the lower end of the steam guide pipe 51 passes through the outer wall of the water storage tank body 1 and is connected to the steam condensation water tank 5;

[0058] It also includes a cold water pipe 6, the cold water pipe 6 is connected to the water outlet main pipe, and the cold water pipe 6 is connected to a fourth solenoid valve 61;

[0059] It also includes a water outlet temperature setting module, which is used for the user to input the water outlet temperature of the main water outlet pipe 7 according to needs;

[0060] It also includes a PLC, which is electrically connected to the first solenoid valve 21, the second solenoid valve 31, the third solenoid valve 41, the fourth solenoid valve 61, the four-way valve 71, the first temperature sensor 111, the second temperature sensor 121, the third temperature sensor 131, the first liquid level sensor 112, the second liquid level sensor 122, the third liquid level sensor 132 and the water outlet temperature setting module.

[0061] As a preferred embodiment, the upper portion of the steam guide pipe 51 located in the second water storage chamber 12 is provided with a first opening 52 for depressurizing the second water storage chamber 12 .

[0062] As a preferred embodiment, a second opening 53 is provided at an upper portion of the steam guide pipe 51 located in the third water storage chamber 13 for depressurizing the third water storage chamber 13 .

[0063] As a preferred embodiment, the fourth solenoid valve 61 is a three-way valve, the steam condensate water tank 5 is connected to one end of the three-way valve through a fourth connecting pipe, and a fourth liquid level sensor 54 is provided in the steam condensate water tank 5; the fourth liquid level sensor 54 is electrically connected to the PLC.

[0064] As a preferred embodiment, the middle section of the steam guide pipe 51 is coiled and disposed in the third water storage chamber 13 .

[0065] As a preferred embodiment, in the above-mentioned water storage tank structure for air source heat pump, the main water outlet pipe 7 is further provided with a fourth temperature sensor 72, and the fourth temperature sensor 72 is electrically connected to the PLC.

[0066] The specific implementation of the present invention also relates to a control method for the water storage tank for the air source heat pump, comprising the following steps:

[0067] Set the outlet water temperature through the outlet water temperature setting module;

[0068] If the set outlet water temperature is lower than the temperature value of the third temperature sensor 131, the four-way valve 71 is controlled to adjust the third outlet water pipe 133 to be connected with the main outlet water pipe 7, and at the same time, the fourth solenoid valve 61 is controlled to adjust the opening of the cold water pipe 6 according to the difference between the temperature value of the third temperature sensor 131 and the set outlet water temperature, so that the cold water flowing out of the cold water pipe 6 is mixed with the outlet water of the main outlet water pipe 7, so that the outlet water of the main outlet water pipe 7 is close to the set outlet water temperature;

[0069] If the set outlet water temperature is higher than the temperature value of the third temperature sensor 131 and lower than the temperature value of the second temperature sensor 121, the four-way valve 71 is controlled to be adjusted to connect the second outlet water pipe 123 with the main outlet water pipe 7, and at the same time, the fourth solenoid valve 61 is controlled to adjust the opening of the cold water pipe 6 according to the difference between the temperature value of the second temperature sensor 121 and the set outlet water temperature, so that the cold water flowing out of the cold water pipe 6 is mixed with the outlet water of the main outlet water pipe 7, so that the outlet water of the main outlet water pipe 7 is close to the set outlet water temperature;

[0070] If the set outlet water temperature is higher than the temperature value of the second temperature sensor 121 and lower than the temperature value of the first temperature sensor 111, the four-way valve 71 is controlled to be adjusted to connect the first outlet water pipe 113 with the main outlet water pipe 7, and at the same time, the fourth solenoid valve 61 is controlled to adjust the opening of the cold water pipe 6 according to the difference between the temperature value of the first temperature sensor 111 and the set outlet water temperature, so that the cold water flowing out of the cold water pipe 6 is mixed with the outlet water of the main outlet water pipe 7, so that the outlet water of the main outlet water pipe 7 is close to the set outlet water temperature;

[0071] When the third liquid level sensor 132 detects that the liquid level in the third water storage chamber 13 is lower than a preset threshold, the third solenoid valve 41 is controlled to open and close after a preset time, so that the water in the second water storage chamber 12 enters the third water storage chamber 13 through the second connecting pipe 4;

[0072] When the second liquid level sensor 122 detects that the liquid level in the second water storage chamber 12 is lower than a preset threshold, the second solenoid valve 31 is controlled to open and close after a preset time, so that the water in the first water storage chamber 11 enters the second water storage chamber 12 through the second connecting pipe 4;

[0073] When the first liquid level sensor 112 detects that the liquid level in the first water storage chamber 11 is lower than a preset threshold, the first solenoid valve 21 is controlled to open and close after a preset time, so that the hot water heated by the air source heat pump enters the first water storage chamber 11 through the hot water inlet pipe 2.

[0074] As a preferred embodiment, in the control method of the water storage tank for the above-mentioned air source heat pump, when the fourth liquid level sensor 54 detects that the liquid level in the steam condensation water tank 5 is higher than the preset threshold value, the three-way valve is controlled to adjust the fourth connecting pipe to the water outlet section of the cold water pipe 6, and the cold water in the steam condensation water tank 5 is passed into the main water outlet pipe 7 for adjusting the water temperature.

[0075] As a preferred embodiment, the control method of the water storage tank for the above-mentioned air source heat pump further includes: adjusting the opening of the fourth solenoid valve 61 according to the temperature value sensed by the fourth temperature sensor 72 until the temperature sensed by the fourth temperature sensor 72 reaches a preset temperature range.

[0076] In the above implementation mode, it should be noted that, assuming that the water temperature introduced into the first water storage chamber 11 after being heated by the air source heat pump is 85°C, the water temperature in the second water storage chamber 12 will drop to about 70°C, and the water temperature in the third water storage chamber 13 will drop to about 50°C. The above temperatures are not fixed, and are related to the sizes of the first water storage chamber 11, the second water storage chamber 12, and the third water storage chamber 13, the insulation material and thickness of the water storage tank body 1, the water level in each water storage chamber, the external room temperature and the water storage time. When the user needs to use 80°C water, the four-way valve 71 is first controlled to be adjusted to the first water outlet pipe 113 and the main water outlet pipe 7 are connected, and the opening of the fourth solenoid valve 61 is adjusted to adjust the final water outlet temperature to between 79-81°C; when the user needs to use 40°C water, the four-way valve 71 is first controlled to be adjusted to the third water outlet pipe 133 and the main water outlet pipe 7 are connected, and the opening of the fourth solenoid valve 61 is adjusted to adjust the final water outlet temperature to between 39-41°C.

[0077] In the above embodiments, the low liquid level threshold sensed by the first liquid level sensor 112, the second liquid level sensor 122, the third liquid level sensor 132, and the fourth liquid level sensor 54 is approximately between one-fifth and one-quarter of the height of the container. For example, when the liquid level in the third water storage chamber 13 drops to one-third of the liquid level, the third solenoid valve 41 is triggered to open. At this time, the second water storage chamber 12 and the third water storage chamber 13 form a U-shaped tube, and the water in the second water storage chamber 12 with a high liquid level is replenished into the third water storage chamber 13 through the liquid level difference until the water levels in the third water storage chamber 13 and the second water storage chamber 12 are flush.

[0078] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water storage tank for an air source heat pump, characterized in that: It includes a water storage tank body, the water storage tank body is in the shape of a cylinder, the water storage tank is divided into a first water storage chamber, a second water storage chamber and a third water storage chamber arranged in sequence from the inside to the outside by two annular partitions, the first water storage chamber is in the shape of a cylinder, the second water storage chamber is in the shape of a circular cylinder, and the third water storage chamber is in the shape of a circular cylinder; The axes of the first water storage chamber, the second water storage chamber and the third water storage chamber coincide with each other; A first temperature sensor and a first liquid level sensor are provided in the first water storage chamber; A second temperature sensor and a second liquid level sensor are provided in the second water storage chamber; A third temperature sensor and a third liquid level sensor are provided in the third water storage chamber; The lower part of the first water storage chamber is connected to a hot water inlet pipe, and the hot water inlet pipe is connected to a first solenoid valve; The first water storage chamber and the lower part of the second water storage chamber are connected through a first connecting pipe, and the first connecting pipe is connected to a second solenoid valve; The lower parts of the second water storage chamber and the third water storage chamber are connected through a second connecting pipe, and the second connecting pipe is connected to a third solenoid valve; The lower part of the first water storage chamber is connected to a first water outlet pipe; the lower part of the second water storage chamber is connected to a second water outlet pipe, and the lower part of the third water storage chamber is connected to a third water outlet pipe, and the first water outlet pipe, the second water outlet pipe and the third water outlet pipe are connected to the main water outlet pipe through a four-way valve; It also includes a steam condensation water tank and a steam guide pipe, wherein the middle section of the steam guide pipe is arranged in the third water storage chamber, the upper end of the steam guide pipe passes through the second water storage chamber and is connected to the upper part of the first water storage chamber, and the lower end of the steam guide pipe passes through the outer wall of the water storage tank body and is connected to the steam condensation water tank; It also includes a cold water pipe, the cold water pipe is connected to the water outlet main pipe, and the cold water pipe is connected to a fourth solenoid valve; It also includes a water outlet temperature setting module, wherein the water outlet temperature setting module is used for the user to input the water outlet temperature of the main water outlet pipe according to the needs; It also includes a PLC, which is electrically connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the four-way valve, the first temperature sensor, the second temperature sensor, the third temperature sensor, the first liquid level sensor, the second liquid level sensor, the third liquid level sensor and the water outlet temperature setting module.

2. The water storage tank for an air source heat pump according to claim 1, characterized in that: The upper portion of the steam guide pipe located in the second water storage chamber is provided with a first opening.

3. The water storage tank for an air source heat pump according to claim 1, characterized in that: The upper portion of the steam guide pipe located in the third water storage chamber is provided with a second opening.

4. The water storage tank for an air source heat pump according to claim 1, characterized in that: The fourth solenoid valve is a three-way valve, the steam condensate water tank is connected to one end of the three-way valve through a fourth connecting pipe, and a fourth liquid level sensor is provided in the steam condensate water tank; the fourth liquid level sensor is electrically connected to the PLC.

5. The water storage tank for an air source heat pump according to claim 1, characterized in that: The middle section of the steam guide pipe is coiled and arranged in the third water storage chamber.

6. The water storage tank for an air source heat pump according to claim 1, characterized in that: The main water outlet pipe is also provided with a fourth temperature sensor, and the fourth temperature sensor is electrically connected to the PLC.

7. The control method for a water storage tank for an air source heat pump according to any one of claims 1 to 6, characterized in that: The following steps are involved: Set the outlet water temperature through the outlet water temperature setting module; If the set outlet water temperature is lower than the temperature value of the third temperature sensor, the four-way valve is controlled to adjust the third outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the third temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature; If the set outlet water temperature is higher than the temperature value of the third temperature sensor and lower than the temperature value of the second temperature sensor, the four-way valve is controlled to adjust the second outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the second temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature; If the set outlet water temperature is higher than the temperature value of the second temperature sensor and lower than the temperature value of the first temperature sensor, the four-way valve is controlled to adjust the first outlet water pipe to be connected with the main outlet water pipe, and at the same time, the fourth solenoid valve is controlled to adjust the opening of the cold water pipe according to the difference between the temperature value of the first temperature sensor and the set outlet water temperature, so that the cold water flowing out of the cold water pipe is mixed with the outlet water of the main outlet water pipe, so that the outlet water of the main outlet water pipe is close to the set outlet water temperature; When the third liquid level sensor detects that the liquid level in the third water storage chamber is lower than a preset threshold, the third solenoid valve is controlled to open and close after a preset time, so that the water in the second water storage chamber enters the third water storage chamber through the second connecting pipe; When the second liquid level sensor detects that the liquid level in the second water storage chamber is lower than a preset threshold, the second solenoid valve is controlled to open and close after a preset time, so that the water in the first water storage chamber enters the second water storage chamber through the second connecting pipe; When the first liquid level sensor detects that the liquid level in the first water storage chamber is lower than a preset threshold, the first solenoid valve is controlled to open and close after a preset time, so that the hot water heated by the air source heat pump enters the first water storage chamber through the hot water inlet pipe.

8. The control method for a water storage tank for an air source heat pump according to claim 7, characterized in that: When the fourth liquid level sensor detects that the liquid level in the steam condensate water tank is higher than a preset threshold, the three-way valve is controlled to adjust the fourth connecting pipe to the water outlet section of the cold water pipe, and the cold water in the steam condensate water tank is passed into the main water outlet pipe to adjust the water temperature.

9. The control method for a water storage tank for an air source heat pump according to claim 7, characterized in that: Also includes: The opening of the fourth solenoid valve is adjusted according to the temperature value sensed by the fourth temperature sensor until the temperature sensed by the fourth temperature sensor reaches a preset temperature range.

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