Heat exchange liquid storage device and air conditioning system

Abstract

The utility model provides a heat exchange liquid storage device and an air conditioning system. The heat exchange liquid storage device comprises a body which is internally provided with a storage cavity used for storing heat exchange liquid, and one end of the body is provided with a liquid inlet and outlet communicated with the storage cavity; the separation assembly can move in the storage cavity in the direction close to or away from the liquid inlet and outlet so as to change the size of the storage cavity; and the heat exchange pipes are arranged on the periphery of the body and exchange heat with the heat exchange liquid in the body so as to change the pressure in the storage cavity. The temperature and the pressure of the heat exchange liquid in the heat exchange liquid storage device can be changed, the heat exchange liquid can be recycled and released more easily, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning systems, and particularly relates to a heat exchange liquid storage device and an air conditioning system. Background Technique

[0002] When technicians develop air conditioning units, they will measure a refrigerant mass that can achieve the best energy efficiency when the unit is cooling or heating in the laboratory according to the main application scenarios of the air conditioning unit.

[0003] Taking a heat pump water heater as an example, a heat pump water heater is an efficient heating device that uses heat pump technology to extract heat from the environment and transfer it to water. Its working principle is similar to that of an air conditioner or a refrigerator. Through the reverse Carnot cycle, it absorbs heat from a low-temperature heat source (such as air, water or geothermal energy) and transfers it to the water tank for heating.

[0004] The mass of the refrigerant (i.e., the refrigerant charge in the system) directly affects the heat exchange effect and energy efficiency of the heat pump water heater. Under different working conditions (such as the cooling condition or the heating condition), there are different optimal refrigerant masses.

[0005] In the heating mode, the heat pump needs to transfer the heat in the refrigerant to the water to the maximum extent. Therefore, in the laboratory, technicians will measure a refrigerant mass that is most suitable for heating to achieve the highest energy efficiency.

[0006] In the cooling mode, the heat pump needs to absorb as much heat as possible from the environment. Therefore, the optimal refrigerant mass is different from that in the heating mode to ensure the best energy efficiency during the cooling process.

[0007] Since the refrigerant mass directly affects the heat exchange effect, if the refrigerant amount in the system is not suitable for the current working mode, the energy efficiency of the unit will decrease, which may lead to poor heating effect or unsatisfactory cooling effect.

[0008] Therefore, when technicians develop a new series of heat pump water heater products, they will measure a refrigerant mass that can achieve the best energy efficiency when the unit is heating in the laboratory, but this refrigerant mass is obviously not optimal for the unit's cooling. Moreover, when the unit leaks, maintenance personnel generally directly release the refrigerant and then perform maintenance, which is uneconomical and not environmentally friendly.

[0009] Then, how to control the amount of refrigerant running in the air conditioning system will directly relate to the heat exchange effect of the unit and affect the energy efficiency of the unit. Therefore, a storage device needs to be provided so that the air conditioning system can take or store as needed under different working conditions.

[0010] Existing storage devices rely on external forces to suck the refrigerant in the air-conditioning system into the storage device, or to push the refrigerant in the storage device into the air-conditioning system by external forces, without considering the state of the refrigerant, which is not environmentally friendly and economical. Summary of the Invention

[0011] The present invention proposes a heat exchange liquid storage device and an air-conditioning system to solve the technical problem that the refrigerant storage device only relies on external forces to push or suck the refrigerant.

[0012] The heat exchange liquid storage device proposed by the present invention includes:

[0013] A main body, which is provided with a storage cavity for storing heat exchange liquid, and one end thereof is provided with an inlet / outlet connected to the storage cavity;

[0014] A partition component, which can move in the storage cavity in a direction close to or away from the inlet / outlet to change the size of the storage cavity;

[0015] A heat exchange tube, which is arranged around the main body and exchanges heat with the heat exchange liquid in the main body to change the pressure in the storage cavity.

[0016] Further, the partition component includes: a slider with an outer diameter matching the inner diameter of the storage cavity, and a power component arranged on the main body for driving the slider to move.

[0017] Further, the power component is an electric push rod.

[0018] Further, the heat exchange tube is arranged in the side wall of the main body and is spiral around the axis of the storage cavity.

[0019] Further, the heat exchange tube is a copper tube.

[0020] The air-conditioning system proposed by the present invention uses the heat exchange liquid storage device described in the above technical solution to supplement or store excess refrigerant.

[0021] Further, the air-conditioning system includes a liquid level sensor, a temperature sensor and a pressure sensor for respectively detecting the liquid level, temperature and pressure of the heat exchange liquid storage device.

[0022] Further, the air-conditioning system is a heat pump hot water air-conditioning system.

[0023] Further, the inlet / outlet of the heat exchange liquid storage device is connected to the liquid outlet pipeline of the water-side heat exchanger of the heat pump hot water air-conditioning system through a first branch pipeline, one end of the heat exchange tube of the heat exchange liquid storage device is connected to the inlet pipeline of the outdoor heat exchanger of the heat pump hot water air-conditioning system through a second branch pipeline, and the other end of the heat exchange tube is connected to the inlet pipeline of the electronic expansion valve through a third branch pipeline.

[0024] Furthermore, a solenoid valve is provided on the first branch pipeline, and / or the second branch pipeline, and / or the third branch pipeline.

[0025] When the heat exchange liquid of the present utility model is recovered or released, by changing the temperature of the heat exchange liquid in the heat exchange liquid storage device, the heat exchange liquid can be recovered or released more smoothly, reducing the energy consumption of the external applied force. At the same time, the present utility model also solves the influence of different refrigerant amounts for refrigeration and heating on the performance of the unit, and also solves the problems of uneconomical and non-environmental protection caused by discharging the refrigerant during unit maintenance.

[0026] Those skilled in the art can, based on the present utility model and in cooperation with corresponding controls, timely adjust the refrigerant amount in the system when the unit switches modes, so that the unit is in the best state whether it is refrigerating or heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present utility model will be described in detail below in conjunction with the embodiments and the drawings, where:

[0028] Figure 1 is a schematic cross-sectional view of a heat exchange liquid storage device according to an embodiment of the present utility model.

[0029] Figure 2 is a schematic partial structure view of an air conditioning system according to an embodiment of the present utility model.

[0030] Figure 3 is Figure 2 a schematic refrigerant flow diagram of the air conditioning system for recovering refrigerant through the heat exchange liquid storage device during heating.

[0031] Figure 4 is Figure 2 a schematic refrigerant flow diagram of the air conditioning system for releasing refrigerant through the heat exchange liquid storage device during refrigeration.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 1, compressor; 2, four-way valve; 3, outdoor heat exchanger; 4, electronic expansion valve; 5, water-side heat exchanger; 6, gas-liquid separator; 7, second solenoid valve; 8, heat exchange liquid storage device; 9, third solenoid valve; 10, solenoid valve; 11, first solenoid valve.

[0034] 800, second branch pipeline; 802, electric push rod; 803, third branch pipeline; 804, heat exchange tube; 805, liquid level sensor; 806, temperature sensor; 807, pressure sensor; 808, first branch pipeline; 809, slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0036] Thus, a feature pointed out in this specification will be used to illustrate one of the features of one embodiment of the present utility model, rather than implying that each embodiment of the present utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features may be combined together to show possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0037] In existing air-conditioning units, in order to optimize the refrigerant amount when switching between the cooling mode and the heating mode, some specific technical means are usually adopted. For example, a heat exchange liquid storage device is used. These technical means are mainly used to ensure that the air conditioner can maintain high energy efficiency performance in different working modes.

[0038] The heat exchange liquid storage device is also called a liquid receiver (or liquid storage tank), which is used to store excess refrigerant so as to adjust the total amount of refrigerant in different modes of the system. When the system switches from the cooling mode to the heating mode, the liquid receiver can release or store refrigerant to ensure that the refrigerant amount in the system is in an optimal state.

[0039] The heat exchange liquid storage device proposed by the present utility model includes: a body, a partition component and a heat exchange tube.

[0040] The body refers to the main part of the heat exchange liquid storage device. A storage cavity for storing heat exchange liquid is provided inside the body, and an inlet and outlet for liquid communication with the storage cavity is provided at one end of the body. In one embodiment, the inlet and outlet can refer to the same inlet and outlet for refrigerant to enter and leave. In other embodiments, for the convenience of pipeline connection, the inlet and outlet can also refer to the inlet and outlet for refrigerant to enter and leave respectively. However, whether one or two inlet and outlets are provided, they are all provided at one end of the body, so that the partition component has a larger space to move.

[0041] The partition component can move in the storage cavity in a direction close to or away from the inlet and outlet to change the size of the storage cavity, thereby changing the refrigerant in the storage cavity.

[0042] The heat exchange tubes are arranged around the body. The heat exchange tubes are not connected to the storage cavity inside the body. The heat exchange tubes can generate heat or cold, and then exchange heat with the heat exchange liquid inside the body to change the pressure in the storage cavity. By exchanging heat between the heat exchange tubes and the heat exchange liquid inside the body, the state of the heat exchange liquid is changed. For example, when additional heat exchange liquid needs to be added to the air-conditioning system, the heat exchange liquid can be heated through the heat exchange tubes, so that the temperature of the heat exchange liquid rises and the pressure increases, which is more conducive to the heat exchange liquid gushing out from the storage cavity. When the heat exchange liquid in the air-conditioning system needs to be recovered, the heat exchange liquid in the storage cavity is cooled through the heat exchange tubes, so that the temperature of the heat exchange liquid decreases and the pressure decreases, which is more conducive to the suction of the heat exchange liquid.

[0043] The utility model cooperates with the heat exchange tubes through the partition component to release and recover the heat exchange liquid, which is more energy-saving. Under normal circumstances, the heat exchange liquid referred to in the utility model is a refrigerant. In special application scenarios, the heat exchange liquid can also be other liquids used for heat exchange.

[0044] In one embodiment, the partition component includes a slider and a power component.

[0045] The outer diameter of the slider matches the inner diameter of the storage cavity. For example, when the storage cavity is a cylindrical storage cavity, the slider is a circle with an outer diameter matching its inner diameter. When the storage cavity is a polygonal prism-shaped storage cavity, the slider is a polygon with an outer diameter matching its inner diameter. The utility model does not limit the specific shapes of the storage cavity and the slider.

[0046] The power component is arranged on the body to drive the slider to move, so that the space between the slider and the end of the body where the liquid inlet and outlet are located can change.

[0047] Adopting the slider and the power component makes the structure of the heat exchange liquid storage device of the utility model simpler and easier to implement.

[0048] In some other embodiments, the slider can specifically be a sealing plug. The periphery of the sealing plug is in a sealed state with the inner wall of the storage cavity to prevent the heat exchange liquid from flowing into the space at the end of the body far from the liquid inlet and outlet during the movement of the sealing plug.

[0049] In one embodiment, the electric push rod can be used as the power component. In addition to the electric push rod, other linear motion mechanisms can also be used to push the slider. Compared with other linear motion structures, the structure of the electric push rod is simpler and easier to maintain.

[0050] In one embodiment, the heat exchange tubes of the utility model are arranged inside the side wall of the body and are spiral around the axis of the storage cavity.

[0051] The heat exchange tubes are arranged inside the side wall of the main body, so that the heat exchange tubes can better contact the heat exchange liquid in the storage cavity. Moreover, the spiral heat exchange tubes are more conducive to increasing the heat exchange area and changing the temperature and pressure of the heat exchange liquid in the storage cavity.

[0052] In one embodiment, the heat exchange tubes are copper tubes. Specifically, the heat exchange tubes are hollow copper tubes. In this way, the heat exchange tubes can receive the refrigerant at the corresponding temperature in the air-conditioning system through the connection of the corresponding pipelines, thus avoiding the need to additionally set corresponding heaters or temperature reducers to change the temperature of the heat exchange tubes.

[0053] In other embodiments, the heat exchange tubes can also be solid pipelines cooled by heaters or other cooling devices. However, this requires adding additional devices such as heaters, which will make the structure of the air-conditioning system more complex and not conducive to maintenance.

[0054] Figure 1 Fig. shows a schematic cross-sectional structure diagram of the heat exchange liquid storage device of the present invention. The heat exchange liquid storage device includes a main body 801, an electric push rod 802 arranged on the main body 801 and extending into the storage cavity, a slider 809 installed at the end of the electric push rod 802, a heat exchange tube 804 wound around the main body 801, a first branch pipeline 808 connecting the inlet and outlet ports, a second branch pipeline 800 connecting one end of the heat exchange tube 804, a third branch pipeline 803 connecting the other end of the heat exchange tube 804, a liquid level sensor 805 for detecting the liquid level of the heat exchange liquid, a temperature sensor 806 for detecting the temperature of the heat exchange liquid, and a pressure sensor 807 for detecting the pressure of the heat exchange liquid.

[0055] Based on the above heat exchange liquid storage device, the present invention also protects the corresponding air-conditioning system. The air-conditioning system of the present invention uses the heat exchange liquid storage device of the present invention to supplement the refrigerant or store the excess refrigerant.

[0056] Since the air-conditioning system usually requires more refrigerant in the cooling mode than in the heating mode, therefore, in the heating mode, the excess refrigerant can be stored in the heat exchange liquid storage device to prevent the excessive refrigerant from affecting the heating effect. In the cooling mode, the heat exchange liquid storage device releases the refrigerant into the system, increasing the refrigerant circulation volume and improving the cooling effect.

[0057] In one embodiment, the air-conditioning system can further include a liquid level sensor, a temperature sensor and a pressure sensor.

[0058] The liquid level sensor is used to detect the liquid level of the heat exchange liquid storage device.

[0059] The temperature sensor is used to detect the temperature of the heat exchange liquid storage device.

[0060] The pressure sensor is used to detect the pressure of the heat exchange liquid storage device.

[0061] The function of setting these sensors is mainly to enable the air-conditioning system to accurately control the amount of refrigerant released or inhaled by the heat exchange liquid storage device. The air-conditioning system can calculate the current density of the refrigerant based on the temperature and pressure in the heat exchange liquid storage device. According to the current density and current volume of the refrigerant, the mass of the refrigerant in the current heat exchange liquid storage device can be calculated. The specific calculation method is a relatively conventional technology in the prior art and will not be described in detail in this utility model.

[0062] In one embodiment, the air-conditioning system specifically refers to a heat pump hot water air-conditioning system. For the convenience of description, this utility model will use the heat pump hot water air-conditioning system for further illustration. However, the air-conditioning system of this utility model is not limited to the heat pump hot water air-conditioning system, and other air-conditioning systems can also apply the heat exchange liquid storage device of this utility model.

[0063] Next, describe the connection relationship between the heat exchange liquid storage device and each part of the heat pump hot water air-conditioning system in one embodiment.

[0064] The liquid inlet and outlet of the heat exchange liquid storage device are connected to the liquid outlet pipeline of the water-side heat exchanger of the heat pump hot water air-conditioning system through the first branch pipeline. One end of the heat exchange pipe of the heat exchange liquid storage device is connected to the inlet pipeline of the outdoor heat exchanger of the heat pump hot water air-conditioning system through the second branch pipeline, and the other end of the heat exchange pipe is connected to the inlet pipeline of the electronic expansion valve through the third branch pipeline.

[0065] This connection method is just one example listed. In fact, the heat exchange liquid storage device can also be connected to the air-conditioning system through other branch pipelines for other connections to supplement or store the refrigerant in the air-conditioning system and change the temperature of the refrigerant in the heat exchange liquid storage device as needed.

[0066] In one embodiment, solenoid valves are provided on the first branch pipeline, and / or the second branch pipeline, and / or the third branch pipeline. The solenoid valves are used for convenient control, and those skilled in the art can also use other forms of valves for control.

[0067] Figure 2 Shows a partial structural diagram of the heat pump hot water air-conditioning system.

[0068] This heat pump hot water air-conditioning system is also called a heat pump water heater, and specifically includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an electronic expansion valve 4, a water-side heat exchanger 5, a gas-liquid separator 6, a heat exchange liquid storage device 8, a solenoid valve 10 provided between the four-way valve 2 and the water-side heat exchanger, and a first solenoid valve 11, a second solenoid valve 7, and a third solenoid valve 9 used to control the connection or disconnection between the heat exchange liquid storage device and the heat pump hot water air-conditioning system.

[0069] Some supplementary explanations for the specific control of the refrigerant amount are as follows.

[0070] Assume that when the unit is in the heating mode, the optimal refrigerant amount required is M1, and when in the cooling mode, the optimal refrigerant amount required is M2, where M2 > M1. The refrigerant amount of the unit at the time of leaving the factory is customized according to the optimal refrigerant amount required in the cooling mode, that is, the initial refrigerant amount of the unit is M2.

[0071] The refrigerant amount in the heat exchange liquid storage device 8 at the time of leaving the factory is m, and the total refrigerant amount in the heat exchange liquid storage device 8 after the unit runs is M. Under normal circumstances, the second solenoid valve 7, the third solenoid valve 9, and the first solenoid valve 11 are in the closed state, and the solenoid valve 10 is in the open state.

[0072] As Figure 3 shown, when the heat pump water heater is in the heating mode, the main circuit circulating refrigerant is discharged from the compressor 1 and then enters the four-way valve 2. The four-way valve 2 switches to the heating state, and then enters the water-side heat exchanger 5 (specifically, a plate heat exchanger can be used). After the refrigerant exchanges heat with water, it then passes through the electronic expansion valve 4 for throttling and enters the outdoor heat exchanger 3 (specifically, a fin heat exchanger can be used) for heat exchange. Then, after passing through the four-way valve 2 again, it flows into the gas-liquid separator 6 and returns to the compressor 1.

[0073] After the unit has been stably operating in the heating mode for a time T, the refrigerant amount M in the heat exchange liquid storage device 8 is calculated based on the data detected by the liquid level sensor 805, the temperature sensor 806, and the pressure sensor 807. If M < (M2 - M1 + m), it proves that the refrigerant in the cold unit system is excessive at this time. At this time, the first solenoid valve 11, the second solenoid valve 7, and the third solenoid valve 9 are opened, and at the same time, the electric push rod 802 is powered off and reset, and the slider 809 moves upward. At the same time, the refrigerant with a lower temperature flowing in from the third branch pipe 803 flows into the heat exchange pipe 804 wound around the heat exchange liquid storage device 8 and exchanges heat with the refrigerant inside the heat exchange liquid storage device 8, and then flows out through the second branch pipe 800. After the slider moves upward and heat exchange occurs, the pressure in the heat exchange liquid storage device 8 rapidly decreases. At this time, the high-pressure refrigerant enters the heat exchange liquid storage device 8 through the first branch pipe 808 until the refrigerant amount M in the heat exchange liquid storage device 8 = (M2 - M1 + m), and then the first solenoid valve 11, the second solenoid valve 7, and the third solenoid valve 9 are closed.

[0074] If M>(M2-M1+m), it proves that the refrigerant in the unit system is too little at this time, and the first solenoid valve 11 is opened at this time, and the electric push rod 802 is powered on at the same time, and the slider 809 moves downward to press the refrigerant in the heat exchange liquid storage device 8 into the unit system until the refrigerant amount M in the heat exchange liquid storage device 8 is (M2-M1+m), and the first solenoid valve 11 is closed at this time. In some embodiments, the refrigerant in the heat exchange liquid storage device can also be heated by the refrigerant of the unit in this process, so that the temperature and pressure of the refrigerant in the heat exchange liquid storage device are increased, which is more conducive to the refrigerant entering the unit system.

[0075] like Figure 4 As shown, when the unit is cooling, the main circulating refrigerant is discharged from the compressor 1 and enters the four-way valve 2, the four-way valve 2 is switched to the cooling state, and then enters the outdoor heat exchanger 3. After the refrigerant exchanges heat with the air, it is throttled by the electronic expansion valve 4 and enters the water side heat exchanger 5 for heat exchange, and then passes through the four-way valve 2 again, flows into the gas-liquid separator 6, and returns to the compressor 1.

[0076] After the unit has been running stably for T time in the cooling mode, the amount of refrigerant M in the heat exchange liquid storage device 8 is calculated by the liquid level sensor 805, the temperature sensor 806, and the pressure sensor 807. If M>m, it proves that the refrigerant in the cold unit system is too little at this time. At this time, the first solenoid valve 11, the second solenoid valve 7, and the third solenoid valve 9 are opened, and the electric push rod 802 is powered on, and the slider 809 moves downward; at the same time, the high-temperature refrigerant entering from the second branch pipeline 800 flows into the heat exchange tube 804 wound on the heat exchange liquid storage device 8, and exchanges heat with the refrigerant in the heat exchange liquid storage device 8. After the slider 809 moves downward to exchange heat, the pressure in the heat exchange liquid storage device 8 rises rapidly. At this time, the high-pressure refrigerant enters the unit system through the first branch pipeline 808 until the amount of refrigerant M in the heat exchange liquid storage device 8 = m, and the first solenoid valve 11, the second solenoid valve 7, and the third solenoid valve 9 are closed at this time.

[0077] If M<m, it means that there is too much refrigerant in the unit system. At this time, the first solenoid valve 11 is opened, and the electric push rod 802 is powered off and reset. The slider 809 moves upward to press the refrigerant in the heat exchange liquid storage device 8 into the unit system until the refrigerant amount M in the heat exchange liquid storage device 8 is m. At this time, the first solenoid valve 11 is closed.

[0078] When the unit needs to recover the refrigerant for maintenance, the unit can start the heating mode, then close the solenoid 10, open the first solenoid valve 11, the electric push rod 802 is powered off and reset, and the slider 809 moves upward. At this time, the refrigerant returns to the heat exchange liquid storage device 8 through the first branch pipeline 808 until the unit is protected from low pressure. At this time, the first solenoid valve 11 is closed and the solenoid valve 10 is opened.

[0079] After the repair is completed and after the unit has been evacuated and powered on for time t1, if M < (M2 + M1 + m), then m is re-assigned, that is, m = M + 2m - M2 - M1, so that M = M2 + M1 - m. First, open the first solenoid valve 11, power on the electric push rod 802, and the slider 809 moves downward to press the refrigerant in the heat exchange liquid storage device 8 into the system. After time t2, close the first solenoid valve 11, and the unit is normally controlled after starting up.

[0080] Those skilled in the art can determine the specific values of time t1 and t2 here according to the specific situation of the unit.

[0081] In summary, although existing air-conditioning units can adjust the refrigerant volume in the cooling and heating modes through various technical means to improve system efficiency, the method using the heat exchange liquid storage device is simple and feasible, does not overly increase the complexity of system control, and is superior to other methods in terms of cost and long-term operating efficiency.

[0082] The present utility model realizes the dynamic adjustment of the refrigerant volume through a simple pipeline structure and corresponding valve control to adapt to different working modes.

[0083] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat exchange liquid storage device, characterized in that: include: A main body, which has a storage cavity for storing heat exchange liquid, and one end of which is provided with a liquid inlet and outlet communicated with the storage cavity; A partition assembly, which can move in the storage cavity toward or away from the liquid inlet and outlet to change the size of the storage cavity; The heat exchange tubes are arranged around the body and exchange heat with the heat exchange fluid in the body to change the pressure in the storage cavity.

2. The heat exchange fluid storage device according to claim 1, characterized in that: The partition assembly comprises: a slider whose outer diameter matches the inner diameter of the storage cavity, and a power member arranged on the body for driving the slider to move.

3. The heat exchange fluid storage device according to claim 2, characterized in that: The power piece is an electric push rod.

4. The heat exchange fluid storage device according to claim 1, characterized in that: The heat exchange tube is arranged in the side wall of the body and is spirally arranged around the axis of the storage cavity.

5. The heat exchange fluid storage device according to claim 4, characterized in that: The heat exchange tube is a copper tube.

6. An air conditioning system, characterized in that: The heat exchange liquid storage device as described in any one of claims 1 to 5 is used to replenish refrigerant or store excess refrigerant.

7. The air conditioning system according to claim 6, characterized in that: The air conditioning system includes a liquid level sensor, a temperature sensor and a pressure sensor for respectively detecting the liquid level, temperature and pressure of the heat exchange liquid storage device.

8. The air conditioning system according to claim 6, characterized in that: The air conditioning system is a heat pump hot water air conditioning system.

9. The air conditioning system according to claim 8, characterized in that: The inlet and outlet of the heat exchange liquid storage device are connected to the outlet pipeline of the water side heat exchanger of the heat pump hot water air conditioning system through a first branch pipeline, one end of the heat exchange tube of the heat exchange liquid storage device is connected to the inlet pipeline of the outdoor heat exchanger of the heat pump hot water air conditioning system through a second branch pipeline, and the other end of the heat exchange tube is connected to the inlet pipeline of the electronic expansion valve through a third branch pipeline.

10. The air conditioning system according to claim 9, characterized in that The first branch pipeline, and / or the second branch pipeline, and / or the third branch pipeline are provided with a solenoid valve.

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