Air conditioning system and control method thereof

Abstract

The present invention discloses an air conditioning system and a control method thereof, which relate to the field of energy-saving technology and are for satisfying the cooling or heating needs of users in real time. The air conditioning system comprises: a refrigeration cycle, a cold water circulation pipeline, a hot water circulation pipeline, an intermediate water circulation pipeline, a valve assembly, a heat balance device, an evaporation chamber and a condensation chamber. The evaporation chamber is used for heat exchange with the evaporator, and the condensation chamber is used for heat exchange with the condenser. The evaporation chamber is connected in series with the cold water circulation pipeline and the intermediate water circulation pipeline, and the condensation chamber is connected in series with the hot water circulation pipeline and the intermediate water circulation pipeline. The valve assembly is used to switch the evaporation chamber between being connected to the cold water circulation pipeline and being connected to the intermediate water circulation pipeline; the valve assembly is also used to switch the condensation chamber between being connected to the hot water circulation pipeline and being connected to the intermediate water circulation pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of energy saving, and in particular to an air conditioning system and a control method thereof. Background Art

[0002] Air conditioners, also known as air conditioners, are devices that process the temperature, humidity, purity, and airflow speed of air to meet people's production and living needs. In the process of cooling the indoor environment, air conditioners will release a large amount of condensation heat to the outdoor environment, causing the temperature of the outdoor environment to rise, causing serious thermal pollution, and also causing energy waste.

[0003] In order to reduce the emission of air conditioning condensation heat, an air conditioning system capable of recycling condensation heat has appeared in the prior art. The air conditioning system can use the condensation heat of the air conditioning as a heat source to heat circulating hot water, and use the circulating hot water to heat domestic water to meet the user's heat demand. However, due to the difference in the time period between the user's heat demand and the air conditioning system's cooling demand, the air conditioning system cannot meet the user's heat demand and cooling demand in real time. Summary of the invention

[0004] The object of the present invention is to provide an air conditioning system that can meet the heating and cooling needs of users in real time.

[0005] In order to achieve the above-mentioned object, the present invention provides an air conditioning system. The air conditioning system comprises: a refrigeration cycle circuit, with an evaporator, a condenser and a compressor connected in series;

[0006] The cold water circulation pipeline is connected in series with a cold water circulation pump and cold users;

[0007] Hot water circulation pipeline, with hot water circulation pump and heat users connected in series;

[0008] The intermediate water circulation pipeline is serially connected with an intermediate water circulation pump and an energy storage tank;

[0009] A heat balance device, used to adjust the temperature of the energy storage water in the energy storage tank;

[0010] An evaporation chamber and a condensation chamber, wherein the evaporation chamber is used to exchange heat with the evaporator, and the condensation chamber is used to exchange heat with the condenser. The evaporation chamber is connected in series with both the cold water circulation pipeline and the intermediate water circulation pipeline, and the condensation chamber is connected in series with both the hot water circulation pipeline and the intermediate water circulation pipeline;

[0011] A valve assembly is used to switch the evaporation chamber between being connected to the cold water circulation pipeline and being connected to the intermediate water circulation pipeline; the valve assembly is also used to switch the condensation chamber between being connected to the hot water circulation pipeline and being connected to the intermediate water circulation pipeline.

[0012] Compared with the prior art, the air conditioning system provided by the embodiment of the present invention includes an intermediate water circulation pipeline, and the intermediate water circulation pipeline is connected in series with an energy storage tank. The heat balance device is used to adjust the temperature of the energy storage water in the energy storage tank. The evaporation chamber is used to exchange heat with the evaporator, and the condensation chamber is used to exchange heat with the condenser. The evaporation chamber can be connected to the cold water circulation pipeline or the intermediate water circulation pipeline under the action of the valve assembly, and the condensation chamber can be connected to the hot water circulation management or the intermediate water circulation pipeline under the action of the valve assembly. Therefore, when the user has both cold demand and hot demand, the valve assembly can be controlled to connect the evaporator with the cold water circulation pipeline and the condenser with the hot water circulation pipeline. At this time, the air conditioning system is in a cold and hot working condition, and the heat generated by the cold water circulating in the cold water circulation pipeline is used to heat the hot water circulating in the hot water circulation pipeline to meet the user's hot water demand. At the same time, the circulating hot water in the hot water circulation pipeline is used to absorb the heat of the cold water circulating in the cold water circulation pipeline, reduce the temperature of the circulating cold water, and meet the user's cold demand.

[0013] When the user only has a heating demand but no cooling demand, the switching device can be controlled to connect the evaporator to the intermediate water circulation pipeline and the condenser to the hot water circulation pipeline. At this time, the air conditioning system is in a heating state, using the heat of the energy storage water in the intermediate water circulation pipeline to heat the circulating hot water in the hot water circulation pipeline, thereby meeting the user's heating demand.

[0014] When the user only needs cooling but not heating, the switching device can be controlled to connect the evaporator to the cold water circulation pipeline and the condenser to the intermediate water circulation pipeline. At this time, the air conditioning system is in cooling condition, using the energy storage water in the intermediate water circulation pipeline to absorb the heat of the circulating cold water, reduce the temperature of the circulating cold water, and meet the user's cooling demand.

[0015] It can be seen that in the air conditioning system provided by the present invention, the valve assembly can switch the evaporator between being connected to the cold water circulation pipeline and being connected to the intermediate water circulation pipeline according to the needs of the user, and switch the condenser between being connected to the hot water circulation pipeline and being connected to the intermediate water circulation pipeline. Therefore, the air conditioning system provided by the present invention can control the heat exchange objects of the evaporator and the condenser according to the needs of the user. At this time, the air conditioning system can be in a cold and hot working condition, a cold working condition or a hot working condition according to the needs of the user, thereby meeting the user's heat demand or cold demand in real time.

[0016] The present invention also provides a control method for the air conditioning system. The control method for the air conditioning system comprises:

[0017] Receiving the water supply temperature of the cold user and the water supply temperature of the hot user in real time;

[0018] comparing the water supply temperature of the cold user with a first preset cold water supply temperature;

[0019] comparing the water supply temperature of the heat user with a first preset hot water supply temperature;

[0020] When the water supply temperature of the hot user is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user is greater than or equal to the first preset cold water supply temperature, the refrigeration cycle is in a refrigeration condition;

[0021] When the water supply temperature of the cold user is lower than the first preset cold water supply temperature, and the water supply temperature of the hot user is lower than or equal to the first preset hot water supply temperature, the refrigeration cycle is placed in a heating state;

[0022] When the water supply temperature of the cold user is greater than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot user is less than or equal to the first preset hot water supply temperature, the refrigeration cycle is placed in a cold and hot working state;

[0023] When the water supply temperature of the hot user is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user is less than the first preset cold water supply temperature, shutting down the air conditioning system;

[0024] Wherein, placing the refrigeration cycle in a refrigeration condition comprises:

[0025] Control the cold water circulation pump and the intermediate water circulation pump to be in working state, and the hot water circulation pump to be in shutdown state; at the same time, control the valve assembly to connect the evaporation chamber with the cold water circulation pipeline, and connect the condensation chamber with the intermediate water circulation pipeline;

[0026] The step of placing the refrigeration cycle in a heating state is specifically as follows:

[0027] Control the hot water circulation pump and the intermediate water circulation pump to be in working state, and the cold water circulation pump to be in shutdown state; at the same time, control the valve assembly to connect the evaporation chamber with the intermediate water circulation pipeline, and connect the condensation chamber with the hot water circulation pipeline;

[0028] The step of placing the refrigeration cycle in a cold or hot working state is specifically as follows:

[0029] Control the cold water circulation pump and the hot water circulation pump to be in working state, and the intermediate water circulation pump to be in shutdown state; at the same time, control the valve assembly to connect the evaporation chamber with the cold water circulation pipeline, and connect the condensation chamber with the hot water circulation pipeline;

[0030] The shutting down of the air conditioning system comprises:

[0031] The cold water circulation pump, the hot water circulation pump and the intermediate water circulation pump are all in a shutdown state.

[0032] Compared with the prior art, the beneficial effects of the control method of the air-conditioning condensing heat recovery system provided by the present invention are the same as the beneficial effects of the above-mentioned air-conditioning condensing heat recovery system, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 A schematic diagram of the structure of an air conditioning system provided by an embodiment of the present invention;

[0035] Figure 2 One of the flow charts of the control method of the air conditioning system provided by the embodiment of the present invention;

[0036] Figure 3 A second flowchart of the control method of the air conditioning system provided by an embodiment of the present invention;

[0037] Figure 4 Flow chart 3 of the control method of the air conditioning system provided by the embodiment of the present invention;

[0038] Figure 5 A fourth flowchart of a method for controlling an air conditioning system provided by an embodiment of the present invention;

[0039] Figure 6 Flow chart 5 of the control method of the air conditioning system provided by the embodiment of the present invention;

[0040] Figure 7 This is a sixth flowchart of the method for controlling an air-conditioning system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , an embodiment of the present invention provides an air conditioning system. Figure 1 The schematic diagram of the structure of the air conditioning system is shown in FIG. Figure 1 The air conditioning system includes a refrigeration cycle 100, a cold water circulation pipeline 200, a hot water circulation pipeline 300, an intermediate water circulation pipeline 400, an evaporation chamber, a condensation chamber, a valve assembly 500 and a heat balance device 600.

[0043] The refrigeration cycle 100 is connected in series with an evaporator 110, a condenser 120 and a compressor 130. It should be noted that there is a refrigerant in the refrigeration cycle 100. The type of the refrigerant can be selected according to actual conditions. For example, the refrigerant can be Freon.

[0044] The cold water circulation pipeline 200 is connected in series with a cold water circulation pump 210 and a cold user 220. It should be understood that the cold water circulation pump 210 is used to transport the circulating cold water in the cold water circulation pipeline 200. When the circulating cold water flows through the cold user 220, the circulating cold water can exchange heat with the cold user, so that the temperature of the cold user is reduced, thereby meeting the user's cooling demand.

[0045] The hot water circulation pipeline 300 is connected in series with a hot water circulation pump 310, which is used to transport circulating hot water in the hot water circulation pipeline 300. When the circulating hot water flows through the heat user 340, the circulating hot water can exchange heat with the heat user 340, so that the temperature of the heat user 340 increases, thereby meeting the heat demand of the user.

[0046] The intermediate water circulation pipeline 400 is connected in series with an intermediate water circulation pump 410 and an energy storage tank 420 . Energy storage water is stored in the energy storage tank 420 . The intermediate water circulation pump 410 is used to transport the energy storage water in the intermediate water circulation pipeline 400 .

[0047] The evaporation chamber and the condensation chamber, the evaporation chamber is used for heat exchange with the evaporator, and the condensation chamber is used for heat exchange with the condenser. The evaporation chamber is connected in series with the cold water circulation pipeline and the intermediate water circulation pipeline, and the condensation chamber is connected in series with the hot water circulation pipeline and the intermediate water circulation pipeline.

[0048] The valve assembly 500 is used to switch the evaporation chamber between communicating with the cold water circulation pipeline 200 and communicating with the intermediate water circulation pipeline 400. The valve assembly 500 is also used to switch the condensation chamber between communicating with the hot water circulation pipeline 300 and communicating with the intermediate water circulation pipeline 400.

[0049] It should be understood that the cold water circulation pipeline 200 and the intermediate water circulation pipeline 400 cannot be connected to the evaporation chamber at the same time, and the valve assembly 500 is used to connect the evaporation chamber to the cold water circulation pipeline 200 or to connect the evaporation chamber to the intermediate water circulation pipeline 400. When the cold water circulation pipeline 200 is connected to the evaporation chamber, the cold water circulation pipeline 200 can exchange heat with the evaporator 110. When the intermediate water circulation pipeline 400 is connected to the evaporation chamber, the intermediate water circulation pipeline 400 can exchange heat with the evaporator 110.

[0050] The intermediate water circulation pipeline 400 and the hot water circulation pipeline 300 cannot be connected to the condensing chamber at the same time. The valve assembly 500 is used to connect the condensing chamber to the hot water circulation pipeline 300, or to connect the condensing chamber to the intermediate water circulation pipeline 400. When the intermediate water circulation pipeline 400 is connected to the condensing chamber, the intermediate water circulation pipeline 400 can exchange heat with the condenser 120. When the intermediate water circulation pipeline 400 is connected to the condensing chamber, the intermediate water circulation pipeline 400 can be connected to the condenser 120.

[0051] When the above-mentioned air-conditioning system is working, if the user has both heating and cooling demands, the valve assembly 500 is used to connect the evaporation chamber with the cold water circulation pipeline 200 and the condensation chamber with the hot water circulation pipeline, so that the evaporator 110 can exchange heat with the cold water circulation pipeline 200 and the condenser 120 can exchange heat with the hot water circulation pipeline 300, thereby making the refrigeration cycle circuit in a cold or hot working condition.

[0052] In this case, under the action of the cold water circulation pump 210, the circulating cold water exchanges heat with the liquid refrigerant in the evaporator 110, and the liquid refrigerant absorbs the heat of the circulating cold water to reduce the temperature of the circulating cold water, thereby meeting the cooling needs of the user. After the liquid refrigerant absorbs the heat of the circulating cold water, it evaporates into a gaseous refrigerant and flows into the condenser. It should be noted that, under normal circumstances, the above-mentioned evaporator 110 operates with a temperature difference of 5°C. For example, after the circulating cold water with a temperature of 12°C exchanges heat with the evaporator, the temperature of the circulating cold water drops to 7°C.

[0053] Under the action of the hot water circulation pump 310, the circulating hot water exchanges heat with the gaseous refrigerant in the condenser 120, and the heat of the gaseous refrigerant is used to heat the circulating hot water, thereby meeting the user's thermal needs. At the same time, the temperature of the gaseous refrigerant is reduced and converted into liquid refrigerant to flow into the evaporator. It should be noted that, under normal circumstances, the above-mentioned condenser 120 also operates with a temperature difference of 5°C. For example: after the circulating hot water with a temperature of 50°C exchanges heat with the condenser 120, the temperature rises to 55°C.

[0054] It can be seen that when the air-conditioning system is in a cold or hot working condition, the intermediate water circulation pipeline 400 does not participate in the circulation. The heat generated by the circulating cold water in the cold water circulation pipeline 200 can just heat the circulating hot water in the hot water circulation pipeline 300. The circulating hot water can just absorb the temperature of the circulating cold water, thereby satisfying the user's cooling and heating needs at the same time.

[0055] If the user only has a heat demand, the evaporation chamber is connected to the intermediate water circulation pipeline 400, and the condensation chamber is connected to the hot water circulation pipeline 300, so that the evaporator 110 can exchange heat with the intermediate water circulation pipeline 400, and the condenser 120 can exchange heat with the hot water circulation pipeline 300, thereby putting the refrigeration cycle circuit in a heating condition.

[0056] In this case, under the action of the intermediate water circulation pump 410, the energy storage water exchanges heat with the liquid refrigerant in the evaporator 110, and the liquid refrigerant absorbs the heat of the energy storage water, so that the liquid refrigerant evaporates into a gaseous refrigerant and flows into the condenser. It should be noted that, under normal circumstances, the evaporator 110 operates with a temperature difference of 3°C. For example, after the energy storage water with a temperature of 10°C exchanges heat with the evaporator, the temperature of the energy storage water drops to 7°C.

[0057] Under the action of the hot water circulation pump 310, the circulating hot water exchanges heat with the gaseous refrigerant in the condenser 120, and the heat of the gaseous refrigerant is used to heat the circulating hot water, thereby meeting the user's heat demand. At the same time, the temperature of the gaseous refrigerant is reduced and converted into liquid refrigerant to flow into the evaporator. At this time, the condenser 120 also operates with a temperature difference of 5°C.

[0058] It can be seen that when the air-conditioning system is in heating mode, the cold water circulation pipeline 200 does not participate in the circulation, and the heat of the energy storage water in the intermediate water circulation pipeline 400 is used to heat the circulating hot water in the hot water circulation pipeline 300 to meet the user's thermal needs.

[0059] If the user only has a cooling demand, the evaporation chamber is connected to the cold water circulation pipeline 200, and the condensation chamber is connected to the intermediate water circulation pipeline 400, so that the evaporator 110 exchanges heat with the cold water circulation pipeline 200, and the condenser 120 exchanges heat with the intermediate water circulation pipeline 400, thereby putting the refrigeration cycle circuit in a cooling condition.

[0060] In this case, under the action of the cold water circulation pump 210, the circulating cold water exchanges heat with the liquid refrigerant in the evaporator 110, and the liquid refrigerant absorbs the heat of the circulating cold water, so that the temperature of the circulating cold water is reduced and then exchanges heat with the cold user 220, thereby meeting the user's cooling demand. After absorbing the heat of the circulating cold water, the liquid refrigerant evaporates into a gaseous refrigerant and flows into the condenser. At this time, the evaporator 110 operates with a temperature difference of 5°C.

[0061] Under the action of the intermediate water circulation pump 410, the energy storage water exchanges heat with the gaseous refrigerant in the condenser 120, and the energy storage water takes away the heat of the gaseous refrigerant, so that the gaseous refrigerant evaporates into liquid refrigerant and flows into the evaporator. At this time, the condenser also operates at a temperature difference of 5°C.

[0062] It can be seen that when the air-conditioning system is in cooling condition, the hot water circulation pipeline 300 does not participate in the circulation, and the energy storage water in the intermediate water circulation pipeline 400 is used to take away the heat of the circulating cold water in the cold water circulation pipeline 200, thereby reducing the temperature of the circulating cold water and meeting the user's cooling needs.

[0063] It can be seen from the structure of the above-mentioned air-conditioning system and the working process of the air-conditioning system that in the air-conditioning system provided by the embodiment of the present invention, the valve assembly 500 can switch the evaporation chamber between being connected to the cold water circulation pipeline 200 and being connected to the intermediate water circulation pipeline 400 according to the needs of the user, and switch the condensation chamber between being connected to the hot water circulation pipeline 300 and being connected to the intermediate water circulation pipeline 400. Therefore, the air-conditioning system provided by the present invention can control the heat exchange objects of the evaporator 110 and the condenser 120 according to the needs of the user, so that the refrigeration circulation circuit in the air-conditioning system provided by the present invention can be in a cold and hot condition, a cold condition or a hot condition according to the needs of the user, thereby meeting the user's cold demand or hot demand in real time.

[0064] Of course, it should be noted that the heat balance device 600 is used to adjust the temperature of the energy storage water in the energy storage tank 420. Since the intermediate water circulation pipeline 400 needs to be connected to the evaporation chamber and the condensation chamber respectively according to the actual needs of the user. When the intermediate water circulation pipeline 400 is connected to the evaporation chamber, the intermediate water circulation pipeline 400 exchanges heat with the evaporator 110. At this time, the heat generated by the energy storage water is mainly used to heat the circulating hot water, so the intermediate water circulation pipeline 400 needs to have a higher water inlet temperature. When the intermediate water circulation pipeline 400 exchanges heat with the condensation chamber, the intermediate water circulation pipeline 400 exchanges heat with the condenser. At this time, the energy storage water is mainly used to absorb the heat of the circulating cold water and reduce the temperature of the circulating cold water. Therefore, the intermediate water circulation pipeline 400 needs to have a lower water inlet temperature. Therefore, in order to ensure that the intermediate water circulation pipeline 400 has a good heat exchange efficiency with the evaporator 110 and the condenser 120, the temperature of the energy storage water in the energy storage tank 420 needs to be controlled within a suitable temperature range. For example: the temperature in the energy storage tank 420 is controlled within the range of 7°C to 30°C. It should be understood that the type of the above-mentioned heat balance device 600 can be selected according to actual conditions, as long as the heat balance device 600 can adjust the temperature of the energy storage water in the energy storage tank 420 so that the temperature of the energy storage water in the energy storage tank 420 is maintained within the set temperature range. For example: the above-mentioned heat balance device 600 is a combination of a boiler and an air-cooled chiller. When the temperature of the energy storage water in the energy storage tank 420 needs to be increased, the energy storage water is heated by a boiler. When the temperature of the energy storage water in the energy storage tank needs to be lowered, the temperature of the energy storage water is lowered by an air-cooled chiller.

[0065] As a possible implementation, the evaporator 110 is a shell and tube evaporator, the evaporation chamber is surrounded by the shell of the evaporator 110, and the refrigeration cycle 100 is connected in series with the pipeline of the evaporator 110. At this time, the intermediate water circulation pipeline 400 and the cold water circulation pipeline 200 are both connected in series with the shell of the evaporator 110.

[0066] Meanwhile, the condenser 120 is a shell and tube condenser, the condensing chamber is surrounded by the shell of the condenser 120, and the refrigeration cycle 100 is connected in series with the pipeline of the condenser 120. At this time, the intermediate water circulation pipeline 400 and the hot water circulation pipeline are both connected in series with the shell of the condenser 120.

[0067] Specifically, the valve assembly 500 includes a first three-way valve 510 , a second three-way valve 520 , a third three-way valve 530 and a fourth three-way valve 540 .

[0068] The cold water circulation pipeline 200 includes a cold water supply pipe 230 and a cold water return pipe 240. The cold water supply pipe 230, the cold water user 220 and the cold water return pipe 240 are connected in series. At this time, under the action of the cold water circulation pump 210, the circulating cold water can circulate between the cold water supply pipe 230, the cold water user 220 and the cold water return pipe 240 in sequence.

[0069] The hot water circulation pipeline 300 includes a hot water supply pipe 320 and a hot water return pipe 330. The hot water supply pipe 320, the hot water user 340 and the hot water return pipe 330 are connected in series in sequence. At this time, under the action of the hot water circulation pump 310, the circulating hot water can circulate between the hot water supply pipe 320, the hot water user 340 and the hot water return pipe 330 which are connected in series in sequence.

[0070] The intermediate water circulation pipeline 400 includes an intermediate water supply pipe 430 and an intermediate water return pipe 440. The intermediate water return pipe 440, the energy storage tank 420 and the intermediate water supply pipe 430 are connected in series in sequence, so that the energy storage water can circulate between the intermediate water return pipe 440, the energy storage tank 420 and the intermediate water supply pipe 430.

[0071] The first end of the first three-way valve 510 is communicated with the water inlet of the shell of the evaporator 110, the second end of the first three-way valve 510 is communicated with the cold water return pipe 240, and the third end of the first three-way valve 510 is communicated with the intermediate water return pipe 440. The first end of the second three-way valve 520 is communicated with the water outlet of the shell of the evaporator 110, the second end of the second three-way valve 520 is communicated with the cold water supply pipe 230, and the third end of the second three-way valve 520 is communicated with the intermediate water supply pipe 430. The first end of the third three-way valve 530 is connected to the water inlet of the shell of the condenser 120, the second end of the third three-way valve 530 is connected to the intermediate water return pipe 440, and the third end of the third three-way valve 530 is connected to the hot water return pipe 330; the first end of the fourth three-way valve 540 is connected to the water outlet of the shell of the condenser 120, the second end of the fourth three-way valve 540 is connected to the intermediate water supply pipe 430, and the third end of the fourth three-way valve 540 is connected to the hot water supply pipe 320. At this time, the first end of the first three-way valve 510 is connected to the second end, and the first end of the second three-way valve 520 is connected to the second end, so that the cold water circulation pipeline is connected to the evaporator 110. At this time, the first end of the first three-way valve 510 is connected to the third end, and the first end of the second three-way valve 520 is connected to the third end, so that the energy storage water circulation pipeline is connected to the evaporator 110. By connecting the first end of the third three-way valve 530 to the second end and connecting the first end of the fourth three-way valve 540 to the second end, the condenser 120 can be connected to the intermediate water circulation pipeline 400. By connecting the first end of the third three-way valve 530 to the third end and connecting the first end of the fourth three-way valve 540 to the third end, the condenser 120 can be connected to the hot water circulation pipeline 300.

[0072] As a possible implementation, the energy storage tank 420 includes an energy storage tank body 421 and a water distribution device 422 disposed in the energy storage tank body 421. The water distribution device 422 is connected in series with the intermediate water circulation pipeline 400. At this time, when the energy storage water in the intermediate water circulation pipeline 400 flows into the energy storage tank 420, the water can be evenly distributed to prevent the energy storage water in the energy storage tank 420 from surging.

[0073] Exemplarily, the water distribution device 422 includes a first water distributor 4221 and a second water distributor 4222 arranged in parallel, the first water distributor 4221 is higher than the second water distributor 4222, the water inlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a first valve 423, and the water outlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a second valve 424; the water inlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a third valve 425, and the water outlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a fourth valve 426.

[0074] The temperature of the energy storage water at different heights in the energy storage water tank 420 is not the same, and the higher the water level, the higher the temperature of the energy storage water. When the intermediate water circulation pipeline 400 exchanges heat with the evaporator 110, the heat of the energy storage water in the intermediate water circulation pipeline 400 is mainly used to make the refrigerant in the evaporator 110 absorb heat and evaporate. Therefore, the temperature of the water entering the intermediate water circulation pipeline 400 is higher, and the water outlet temperature of the intermediate water circulation pipeline 400 is lower. At this time, the first valve 423 and the fourth valve 426 are closed, and the second valve 424 and the third valve 425 are opened, so that the energy storage water with higher temperature in the upper part of the energy storage tank 420 can flow into the intermediate water circulation pipeline 400 through the first water distributor 4221 and the second valve 424, and the energy storage water flowing out of the intermediate water circulation pipeline 400 can flow into the lower part of the energy storage tank 420 through the third valve 425 and the second water distributor 4222, so that the energy storage water in the intermediate water circulation pipeline 400 has enough heat to fully evaporate the refrigerant in the evaporator 110, and can also ensure the temperature distribution of the energy storage water in the energy storage tank 420.

[0075] When the intermediate water circulation pipeline 400 exchanges heat with the condenser 120, the energy storage water in the intermediate water circulation pipeline 400 is mainly used to take away the heat of the refrigerant and condense the refrigerant. Therefore, the temperature of the inlet water of the intermediate water circulation pipeline 400 is relatively high, and the outlet water temperature of the intermediate water circulation pipeline 400 is relatively high. At this time, the first valve 423 and the fourth valve 426 are opened, and the second valve 424 and the third valve 425 are closed, so that the energy storage water with a lower temperature in the lower part of the energy storage tank 420 can flow into the intermediate water circulation pipeline 400 through the second water distributor 4222 and the fourth valve 426, and the energy storage water flowing out of the intermediate water circulation pipeline 400 can flow into the lower part of the energy storage tank 420 through the first valve 423 and the first water distributor 4221, so that the energy storage water in the intermediate water circulation pipeline 400 can fully condense the refrigerant in the condenser 120, and can also ensure the temperature distribution of the energy storage water in the energy storage tank 420.

[0076] As an embodiment, the above-mentioned heat balance device 600 includes a heat balance circulation pipeline, which is connected in series with a heat exchanger 620 and a heat balance circulation pump group 610. The heat balance circulation pipeline is connected in series with the first water distributor through the first valve 423 and the second valve 424, and the heat balance circulation pipeline is connected in series through the third valve 425 and the fourth valve 426.

[0077] It should be noted that the type of the heat exchanger 620 can be selected according to actual conditions. For example, the heat exchanger 620 can be a ground pipe heat exchanger 620 or a groundwater source heat exchanger 620.

[0078] When the energy storage water in the energy storage tank 420 needs to be heated, the first valve 423 and the fourth valve 426 are opened, and the second valve 424 and the third valve 425 are closed. At this time, the energy storage water with a lower temperature in the lower part of the energy storage tank 420 flows into the heat exchanger 620 through the second water distributor 4222 and the fourth valve 426, and exchanges heat with the heat exchange medium of the heat exchanger 620, so that the temperature of the energy storage water is increased, and then flows into the upper part of the energy storage tank 420 through the first valve 423 and the first water distributor 4221, thereby improving the heating efficiency of the energy storage water in the energy storage tank 420.

[0079] When the energy storage water in the energy storage tank 420 needs to be cooled, the second valve 424 and the third valve 425 are opened, and the first valve 423 and the fourth valve 426 are closed. At this time, the energy storage water with a higher temperature at the upper part of the energy storage tank 420 flows into the heat exchanger 620 through the first water distributor 4221 and the second valve 424, exchanges heat with the heat exchange medium of the heat exchanger 620, and after the temperature of the energy storage water is reduced, it flows into the energy storage tank 420 through the third valve 425 and the second water distributor 4222, thereby increasing the cooling rate of the energy storage water in the energy storage tank 420.

[0080] Specifically, a plurality of temperature detection devices 427 are provided in the energy storage tank body 421 along the height direction, and the heat balance circulation pump 611 group 610 includes a plurality of heat balance circulation pumps 611 arranged in parallel, and the number of the plurality of temperature detection devices 427 is the same as the number of the plurality of heat balance circulation pumps 611. At this time, the plurality of temperature detection devices 427 can respectively detect the temperature of the energy storage water at different heights in the energy storage tank 420. When the temperature detection device 427 detects that the temperature in the energy storage tank 420 does not meet the set temperature, the corresponding heat balance circulation pump 611 can be controlled to open, so that the temperature regulation efficiency of the energy storage water in the energy storage tank 420 can be controlled according to the actual situation.

[0081] For example, the energy storage water tank 420 is provided with a first temperature sensor, a second temperature sensor and a third temperature sensor from bottom to top. The heat balance circulation pump 611 group 610 includes a first heat balance circulation pump 611, a second heat balance circulation pump 611 and a third circulation pump. The first temperature sensor controls the first heat balance circulation pump 611, the second temperature sensor controls the second heat balance circulation pump 611, and the third temperature sensor controls the third heat balance circulation pump 611. The set temperature of the energy storage water in the energy storage water tank 420 is 7~30℃.

[0082] At this time, if the temperature detected by the first temperature sensor is 1°C, the temperature detected by the second temperature sensor is 5°C, and the temperature detected by the third sensor is 9°C, it means that the temperature in the energy storage tank 420 needs to be heated, and the heating amplitude is small. At this time, the heating demand of the energy storage water in the energy storage tank 420 can be met by controlling the first heat balance circulation pump to turn on.

[0083] If the temperature detected by the first temperature sensor is -5°C, the temperature detected by the second temperature sensor is -3°C, and the temperature detected by the third temperature sensor is 2°C, it means that although the temperature in the energy storage tank 420 needs to be heated, the heating amplitude is small. At this time, it is only necessary to control the first heat balance circulation pump 611 and the second heat balance circulation pump 611 to turn on to meet the heating demand of the energy storage water in the energy storage tank 420.

[0084] If the temperature detected by the first temperature sensor is -5°C, the temperature detected by the second temperature sensor is -3°C, and the temperature detected by the third temperature sensor is 2°C, it means that the temperature in the energy storage tank 420 is low and a large heating range is required. At this time, the first heat balance circulation pump 611, the second heat balance circulation pump 611, and the third heat balance circulation pump 611 are all controlled to be turned on, so that the energy storage tank 420 and the heat exchanger 620 have a high heat exchange efficiency, thereby improving the heating efficiency of the energy storage tank 420.

[0085] As an embodiment, the air conditioning system includes at least two refrigeration circulation loops 100, at least two evaporation chambers, at least two condensation chambers and at least two valve assemblies, and the at least two evaporation chambers and the at least two condensation chambers correspond to the at least two refrigeration circulation loops 100 one by one. At this time, each evaporation chamber can exchange heat with the evaporator 110 in the corresponding refrigeration circulation loop 100, and each condensation chamber can exchange heat with the condenser 120 in the corresponding refrigeration circulation loop. At least two valve assemblies correspond to the at least two evaporation chambers one by one, and at least two valve assemblies also correspond to the at least two condensation chambers one by one, so that each valve assembly can switch the corresponding evaporation chamber between heat exchange with the cold water circulation pipeline and heat exchange with the intermediate water circulation pipeline, and each valve assembly can also switch the corresponding condensation chamber between heat exchange with the hot water circulation pipeline and heat exchange with the intermediate water circulation pipeline.

[0086] At this time, at least two refrigeration cycle loops 100 can be in different working conditions according to actual conditions, thereby meeting the cooling and heating demands of users in different situations.

[0087] For example, when the user has both cooling and heating demands, and the cooling demand is relatively small, the evaporation chamber in one refrigeration cycle 100 can be controlled to be connected to the cold water circulation pipeline 200, and the evaporation chambers in the remaining refrigeration cycle 100 can be connected to the intermediate water circulation pipeline 400, and the condensation chambers in each refrigeration cycle 100 can be connected to the hot water circulation pipeline 300, so as to meet the user's cooling and heating demands at the same time.

[0088] When the user has cooling and heating demands, and the cooling demand is higher, all evaporation chambers in the refrigeration cycle 100 can be controlled to be connected to the cold water circulation pipeline 200, and all condensation chambers can be connected to the hot water circulation pipeline 300, thereby meeting the user's higher cooling and heating demands.

[0089] Similarly, when the user has both heat demand and cooling demand, and the heat demand is relatively small, the condensing chamber in one refrigeration cycle 100 can be controlled to be connected to the hot water circulation pipeline 300, and the condensing chamber in another refrigeration cycle 100 can be connected to the intermediate water circulation pipeline 400, and the evaporation chambers in all the refrigeration cycle 100 can be controlled to be connected to the cold water circulation circuit, so as to meet the user's cooling demand.

[0090] When the user has heat and cooling demands, and the heat demand is higher, the condensing chambers in all refrigeration cycle loops 100 can be controlled to be connected to the hot water circulation pipeline 300, and the evaporating chambers can be connected to the cold water circulation loop, thereby meeting the user's higher heat and cooling demands.

[0091] The embodiment of the present invention also provides a control method for an air conditioning system. Figure 2 A flow chart showing a control method of the air conditioning system is shown. Figure 2 , the control method of the above air conditioning system includes:

[0092] S100: receiving the water supply temperature of the cold user 220 and the water supply temperature of the hot user 340 in real time. It should be noted that the water supply temperature of the cold user 220 refers to the temperature of the circulating cold water flowing into the cold user 220. The water supply temperature of the hot user 340 refers to the temperature of the circulating hot water flowing into the hot user 340.

[0093] S200: Compare the water supply temperature of the cold user 220 with the first preset cold water supply temperature. Compare the water supply temperature of the hot user 340 with the first preset hot water supply temperature. It should be noted that the first preset cold water supply temperature can be selected according to actual conditions, for example, the first preset cold water supply temperature is 7°C. The first preset hot water supply temperature can also be set according to actual conditions, for example: the first preset hot water supply temperature is 55°C.

[0094] S310: If the water supply temperature of the hot user 340 is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user 220 is greater than or equal to the first preset cold water supply temperature, the refrigeration cycle 100 is in a refrigeration state. At this time, the user has no heat demand. The refrigeration cycle 100 is in a refrigeration state including: controlling the valve assembly 500 to connect the evaporation chamber with the cold water circulation pipeline 200, and connecting the condensation chamber with the intermediate water circulation pipeline 400. At this time, the air conditioning system only meets the user's refrigeration demand and does not heat the circulating hot water.

[0095] S320: If the water supply temperature of the cold user 220 is less than the first preset cold water supply temperature, and the water supply temperature of the hot user 340 is less than or equal to the first preset hot water supply temperature, the refrigeration cycle 100 is placed in a heating state. At this time, the user only has a heating demand, not a cooling demand. Placing the refrigeration cycle 100 in a heating state includes: controlling the valve assembly 500 to connect the evaporation chamber with the intermediate water circulation pipeline 400, and connecting the condensation chamber with the hot water circulation pipeline 300. At this time, the air conditioning system will not cool the room, but only heat the circulating hot water to meet the user's heat demand.

[0096] S330: If the water supply temperature of the cold user 220 is greater than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot user 340 is less than or equal to the first preset hot water supply temperature, the refrigeration cycle 100 is placed in a cold and hot working state. At this time, the user has both hot and cold demands. Placing the refrigeration cycle 100 in a cold and hot working state includes: controlling the valve assembly 500 to connect the evaporation chamber with the cold water circulation pipeline 200, and connecting the condensation chamber with the hot water circulation pipeline 300. At this time, the air conditioning system can cool the room while heating the circulating hot water, thereby satisfying the user's cold and hot demands at the same time.

[0097] S340: If the water supply temperature of the hot user is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user is less than the first preset cold water supply temperature, the air conditioning system is in a shutdown state. At this time, the user has no cooling demand or heating demand, and the cold water circulation pump, the intermediate water circulation pump and the hot water circulation pump are all controlled to be in a shutdown state, so that the refrigeration cycle is in a cold and hot working condition.

[0098] It can be seen that the control method of the air-conditioning system provided in the embodiment of the present invention can put the air-conditioning system in different operating conditions according to the actual needs of the user, thereby meeting the user's cooling demand or heating demand in real time.

[0099] Specifically, when the valve assembly 500 includes a first three-way valve 510, a second three-way valve 520, a third three-way valve 530 and a fourth three-way valve 540; the cold water circulation pipeline 200 includes a cold water supply pipe 230 and a cold water return pipe 240 that are interconnected, and the cold water supply pipe 230, the cold user 220 and the cold water return pipe 240 are connected in series in sequence; the hot water circulation pipeline 300 includes a hot water supply pipe 320 and a hot water return pipe 330; the intermediate water circulation pipeline 400 includes an intermediate water supply pipe 430 and an intermediate water return pipe 440, and the intermediate water return pipe 440, the energy storage tank 420 and the intermediate water supply pipe 430 are connected in series in sequence; the first end of the first three-way valve 510 is connected to the water inlet of the shell of the evaporator 110, the second end of the first three-way valve 510 is connected to the cold water return pipe 240, and the third end of the first three-way valve 510 is connected to the intermediate water return pipe 4 40 is connected; the first end of the second three-way valve 520 is connected to the water outlet of the shell of the evaporator 110, the second end of the second three-way valve 520 is connected to the cold water supply pipe 230, and the third end of the second three-way valve 520 is connected to the intermediate water supply pipe 430; the first end of the third three-way valve 530 is connected to the water inlet of the shell of the condenser 120, the second end of the third three-way valve 530 is connected to the intermediate water return pipe 440, and the third end of the third three-way valve 530 is connected to the hot water return pipe 330; the first end of the fourth three-way valve 540 is connected to the water outlet of the shell of the condenser 120, the second end of the fourth three-way valve 540 is connected to the intermediate water supply pipe 430, and the third end of the fourth three-way valve 540 is connected to the hot water supply pipe 320, the control valve assembly makes the evaporation chamber connected to the cold water circulation pipeline, and the condensation chamber is connected to the intermediate water circulation pipeline. Specifically includes:

[0100] By connecting the first end of the first three-way valve 510 to the second end of the first three-way valve 510 and connecting the first end of the second three-way valve 520 to the second end of the second three-way valve 520, the cold water circulation pipeline 200 of the evaporation chamber can be connected, so that the evaporator 110 and the cold water circulation pipeline 200 can exchange heat to meet the cooling demand of the user. By connecting the first end of the third three-way valve 530 to the second end of the third three-way valve 530 and connecting the first end of the fourth three-way valve 540 to the second end of the fourth three-way valve 540, the intermediate water circulation pipeline 400 can be connected to the condensation chamber, so that the intermediate water circulation pipeline 400 can exchange heat with the condenser 120.

[0101] The above-mentioned control valve assembly makes the evaporation chamber communicate with the intermediate water circulation pipeline, and the control second valve assembly makes the condensation chamber communicate with the hot water circulation pipeline specifically as follows:

[0102] By connecting the first end of the first three-way valve 510 to the third end of the first three-way valve 510, and connecting the first end of the second three-way valve 520 to the third end of the second three-way valve 520, the evaporation chamber can be connected to the intermediate water circulation pipeline 400, so that the intermediate water circulation pipeline 400 can exchange heat with the evaporator 110. By connecting the first end of the third three-way valve 530 to the third end of the third three-way valve 530, and connecting the first end of the fourth three-way valve 540 to the third end of the fourth three-way valve 540, the evaporation chamber can be connected to the hot water circulation pipeline 300, so that the condenser 120 and the hot water circulation pipeline 300 can exchange heat to meet the user's heat demand.

[0103] The control valve assembly connects the evaporation chamber to the cold water circulation pipeline and the condensation chamber to the hot water circulation pipeline as follows:

[0104] By connecting the first end of the first three-way valve 510 to the second end of the first three-way valve 510 and connecting the first end of the second three-way valve 520 to the second end of the second three-way valve 520, the evaporator 110 can be connected to the cold water circulation pipeline 200, so that the cold water circulation pipeline 200 can exchange heat with the evaporator 110 to meet the user's cooling demand. By connecting the first end of the third three-way valve 530 to the third end of the third three-way valve 530 and connecting the first end of the fourth three-way valve 540 to the third end of the fourth three-way valve 540, the condenser 120 can be connected to the hot water circulation pipeline 300, so that the condenser 120 can exchange heat with the hot water circulation pipeline 300 to meet the user's heating demand.

[0105] As a possible implementation, when the air conditioning system includes at least two refrigeration cycle loops 100, at least two evaporation chambers, at least two condensation chambers, and at least two valve assemblies 500, the at least two evaporation chambers and the at least two condensation chambers correspond one-to-one to the at least two refrigeration cycle loops 100; the at least two valve assemblies 500 correspond one-to-one to the at least two evaporation chambers, and the at least two valve assemblies also correspond one-to-one to the at least two condensation chambers, see Figure 2 and Figure 3 , after S330: the water supply temperature of the cold user 220 is less than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot user 340 is less than the first preset hot water supply temperature, the control method of the air conditioning system further includes:

[0106] S400A: Compare the water supply temperature of the cold user 220 with the second preset cold water supply temperature, so as to determine the size of the cold demand of the user. The second preset cold water supply temperature is greater than the first preset cold water supply temperature. For example, when the first preset cold water supply temperature is 7°C, the second preset cold water supply temperature may be 9°C.

[0107] S500A: When the water supply temperature of the cold user 220 is lower than the second preset cold water supply temperature, one refrigeration cycle 100 is controlled to be in a cold and hot working state, and the other refrigeration cycle 100 is controlled to be in a heating working state. When the water supply temperature of the cold user 220 is lower than the second preset cold water supply temperature, it indicates that the user's cooling demand is small. For example, when the water supply temperature of the cold user 220 is 8°C, it indicates that the user's cooling demand is small.

[0108] At this time, the user's cooling demand can be met by controlling the evaporator 110 in one refrigeration cycle 100 to exchange heat with the cold water circulation pipeline 200. The user's heating demand can be met by controlling the evaporators 110 in the remaining refrigeration cycles 100 to exchange heat with the intermediate water circulation pipeline 400, and by controlling the condensers 120 in all circulation pipelines to exchange heat with the hot water circulation pipeline 300.

[0109] It can be seen that when the user has both cooling and heating demands, and the cooling demand is small, the cooling demand of the user can be met by controlling the evaporator 110 in one cooling circulation pipeline for heat exchange. At the same time, the heat of the energy storage water in the intermediate water circulation pipeline 400 and the heat of the circulating cold water in the evaporator 110 can be used to heat the circulating hot water in the hot water circulation pipeline 300, thereby ensuring the user's heating demand.

[0110] It should be noted that if the water supply temperature of the cold user 220 is greater than the second preset cold water supply temperature, it means that the user's cooling demand is large. At this time, the evaporators 110 in all the refrigeration cycle loops 100 are controlled to exchange heat with the cold water circulation pipeline 200 to meet the user's large cooling demand.

[0111] For example, see Figure 3 and Figure 4 After S500A: placing one refrigeration cycle in a cooling and heating condition; placing the remaining refrigeration cycle in a heating condition, the control method of the air conditioning system further includes:

[0112] S600A: First comparison step: comparing the current water supply temperature of the cold water user 220 with the first preset cold water supply temperature.

[0113] S700A: First step of adding cold and hot working conditions: If the water supply temperature of the cold user 220 is greater than the first preset cold water supply temperature, control a refrigeration cycle 100 in the heating working condition to switch to the cold and hot working condition. The water supply temperature of the cold user 220 is greater than the first preset cold water supply temperature, which means that the number of existing refrigeration cycle 100 in the cold and hot working conditions is small and cannot meet the user's cooling demand. At this time, switching the refrigeration cycle in the heating condition to the cold and hot circulation circuit can increase the number of evaporators 110 in the air-conditioning system that exchange heat with the cold water circulation pipeline 200, thereby further reducing the water supply temperature of the cold user 220, thereby further meeting the user's cooling demand.

[0114] Of course, if the current water supply temperature of the cold user 220 is less than or equal to the first preset cold water supply temperature, it means that one refrigeration cycle 100 is in a cold and hot working state to meet the user's cold demand. At this time, the current operating state of the air conditioning system can be maintained.

[0115] S800A: Repeat the above-mentioned first comparison step and the first step of adding the cooling condition until the water supply temperature of the cold user 220 is less than or equal to the first preset cold water supply temperature or all the refrigeration circulation loops 100 are in the cooling condition. When the water supply temperature of the cold user 220 is less than or equal to the first preset cold water supply temperature, the air conditioning system can meet the user's cooling demand. When all the refrigeration circulation loops 100 are in the cooling condition, if the user's cooling demand is still not met, other cooling devices are required to meet the user's cooling demand. For example, a centrifugal water cooling unit, water storage or ice storage system equipment can be used in conjunction with the air conditioning system to meet the user's cooling demand.

[0116] Specifically, when the energy storage tank 420 includes an energy storage tank body 421 and a water distribution device 422 disposed in the energy storage tank body 421; the water distribution device 422 includes a first water distributor 4221 and a second water distributor 4222 arranged in parallel, the water inlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a first valve 423, and the water outlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a second valve 424; the water inlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a third valve 425, and the water outlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a fourth valve 426, if the water supply temperature of the cold user in S700A is less than the second preset cold water supply temperature, the control method of the above air-conditioning system also includes:

[0117] The second valve 424 and the third valve 425 are opened, and the first valve 423 and the fourth valve 426 are closed.

[0118] It can be seen from the water supply temperature of the cold user 220 or being equal to the second preset cold water supply temperature that the user's cold demand is small. At this time, the intermediate water circulation pipeline 400 mainly exchanges heat with the evaporator 110, so that the refrigerant in the evaporator 110 absorbs heat and evaporates, and the heat in the intermediate water circulation pipeline 400 is transferred to the condenser 120. The condenser 120 exchanges heat with the hot water circulation pipeline 300, so as to use the energy storage water in the intermediate water circulation pipeline 400 to heat the circulating hot water in the hot water circulation pipeline 300 to meet the user's heat demand.

[0119] Since the intermediate water circulation pipeline 400 is mainly used for heat exchange with the evaporator 110, the intermediate water circulation pipeline 400 needs to have a higher water inlet temperature, and the intermediate water circulation pipeline 400 has a lower water outlet temperature. At this time, the first valve 423 and the fourth valve 426 are controlled to be closed, and the second valve 424 and the third valve 425 are opened, so that the water with higher temperature in the upper part of the energy storage tank 420 can enter the intermediate water circulation pipeline 400 through the first water distributor 4221 and the second valve 424 at one time, and the energy storage water in the intermediate water circulation pipeline 400 can flow into the lower part of the energy storage tank 420 through the third valve 425 and the second water distributor 4222, so as to ensure the temperature distribution in the energy storage tank 420.

[0120] When the air conditioning system includes at least two refrigeration circulation circuits 100 and at least two valve assemblies 500, the at least two refrigeration circulation circuits 10 correspond to the at least two valve assemblies 500 one by one, and the valve assembly 500 can control the evaporator 110 in the corresponding refrigeration circulation circuit 100 to switch between heat exchange with the cold water circulation pipeline 200 and heat exchange with the intermediate water circulation pipeline 400, and the condenser 120 to switch between heat exchange with the hot water circulation pipeline 300 and heat exchange with the intermediate water circulation pipeline 400, see Figure 2 and Figure 5 After the water supply temperature of the cold user 220 is greater than the first preset cold water supply temperature and the water supply temperature of the hot user 340 is less than the first preset hot water supply temperature, the control method of the air conditioning system further includes:

[0121] S400B: Compare the water supply temperature of the hot user 340 with the second preset hot water supply temperature, wherein the second preset hot water supply temperature is less than the first preset hot water supply temperature. The second preset hot water supply temperature can be set according to actual conditions. For example, the first preset hot water supply temperature is 55°C, and the second preset hot water supply temperature is 53°C.

[0122] S500B: When the water supply temperature of the heat user 340 is greater than the second preset hot water supply temperature, one refrigeration cycle 100 is controlled to be in a cold and hot working condition, and the refrigeration cycle 100 is in a refrigeration working condition. At this time, the evaporator 110 in one refrigeration cycle 100 exchanges heat with the cold water circulation pipeline 200, and the condenser 120 exchanges heat with the hot water circulation pipeline 300. In the remaining refrigeration cycles 100, the evaporator 110 exchanges heat with the cold water circulation pipeline 200, and the condenser 120 exchanges heat with the intermediate water circulation pipeline 400.

[0123] It can be seen that when the user has both cooling and heating demands, and the heating demand is relatively small, the user's heating demand can be met by controlling only one hot water circulation pipeline 300 to exchange heat with the condenser 120. At the same time, the energy storage water in the intermediate water circulation pipeline 400 can be used to exchange heat with the condenser 120, so that the energy storage water can take away the heat of the circulating cold water, thereby reducing the temperature of the circulating cold water, so that the circulating cold water can exchange heat with the indoor room to meet the user's cooling demand.

[0124] For example, when the first preset hot water supply temperature is 55°C, the second preset hot water supply temperature is 53°C, and the hot water supply temperature measured in real time is 54°C, it can be seen that the user's heat demand is relatively small. At this time, controlling one valve assembly 500 to put the corresponding refrigeration cycle 100 in a cold and hot working condition, and controlling the refrigeration cycle 100 corresponding to the remaining valve assemblies 500 in a cooling working condition can meet the user's cooling demand.

[0125] For example, see 5 and Figure 6 In S500B, a refrigeration cycle 100 is controlled to be in a cold and hot working condition, and after the refrigeration cycle 100 is in a cooling working condition, the control method of the air conditioning system further includes:

[0126] S600B: second comparison step: comparing the current water supply temperature of the heat user 340 with the first preset hot water supply temperature;

[0127] S700B: The second step of adding a cold or hot working condition: if the current water supply temperature of the hot user 340 is lower than the first preset hot water supply temperature, a refrigeration cycle loop 100 in a cooling working condition is controlled to switch to a cold or hot working condition.

[0128] If the current hot water supply temperature is lower than the first preset hot water supply temperature, it means that a refrigeration cycle 100 is in a cold and hot working state and cannot meet the user's heat demand. Controlling a refrigeration cycle 100 in a refrigeration working state to be in a cold and hot working state can increase the number of condensers 120 for heat exchange with the hot water circulation pipeline 300, and further increase the temperature of the circulating hot water in the hot water circulation pipeline 300 to meet the user's heat demand.

[0129] S800B: Repeat the second comparison step and the second step of adding hot and cold working conditions, until the water supply temperature of the heat user 340 is greater than or equal to the first preset hot water supply temperature, or all refrigeration cycle loops 100 are in the heating working condition, thereby meeting the user's heat demand.

[0130] Specifically, when the energy storage tank 420 includes an energy storage tank body 421 and a water distribution device 422 disposed in the energy storage tank body 421; the water distribution device 422 includes a first water distributor 4221 and a second water distributor 4222 arranged in parallel, the water inlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a first valve 423, and the water outlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a second valve 424; the water inlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a third valve 425, and the water outlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a fourth valve 426, after S500B if the water supply temperature of the cold user is less than the second preset cold water supply temperature, the control method of the air conditioning system also includes:

[0131] The second valve 424 and the third valve 425 are controlled to be open, and the first valve 423 and the fourth valve 426 are controlled to be closed.

[0132] The water supply temperature of the heat user 340 is greater than or equal to the second preset hot water supply temperature, indicating that the user's heat demand is small. At this time, the intermediate water circulation pipeline 400 mainly exchanges heat with the condenser 120, so that the energy storage water in the intermediate water circulation pipeline 400 can take away the heat of the circulating cold water in the cold water circulation pipeline 200, thereby ensuring that the air conditioning system meets the user's cooling demand. Therefore, the temperature of the water entering the intermediate water circulation pipeline 400 is low, while the temperature of the water leaving the intermediate water circulation pipeline 400 is high.

[0133] At this time, the first valve 423 and the fourth valve 426 are controlled to be open, and the second valve 424 and the third valve 425 are closed, so that the energy storage water with a lower temperature in the lower part of the energy storage tank 420 can enter the intermediate water circulation pipeline 400 through the second water distributor 4222 and the fourth valve 426, and the energy storage water in the intermediate water circulation pipeline 400 that has undergone heat exchange with the condenser 120 enters the upper part of the energy storage tank 420 through the first valve 423 and the first water distributor 4221, thereby ensuring the heat exchange efficiency between the cold water circulation loop and the condenser 120.

[0134] As an embodiment, when the energy storage tank 420 includes an energy storage tank body 421 and a water distribution device 422 disposed in the energy storage tank body 421; the water distribution device 422 includes a first water distributor 4221 and a second water distributor 4222 arranged in parallel, the water inlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a first valve 423, and the water outlet end of the first water distributor 4221 is connected in series with the intermediate water circulation pipeline 400 through a second valve 424; the water inlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a third valve 425, and the water outlet end of the second water distributor 4222 is connected in series with the intermediate water circulation pipeline 400 through a fourth valve 426, after the water supply temperature of the hot water circulation pipeline 300 in S310 is greater than or equal to the first preset hot water supply temperature, the control method of the air conditioner also includes:

[0135] The first valve 423 and the fourth valve 426 are closed, and the second valve 424 and the third valve 425 are opened. When the water supply temperature of the hot water circulation pipeline 300 is greater than or equal to the first preset hot water supply temperature, the refrigeration circulation loop 100 is in a refrigeration condition. At this time, the energy storage water circulation loop exchanges heat with the condenser 120, so that the energy storage water in the energy storage water circulation loop takes away the heat of the circulating cold water in the cold water circulation loop, ensuring that the cold water in the cold water circulation loop can exchange heat with the room when it flows into the heat exchange pipeline, thereby meeting the user's cooling demand.

[0136] In this case, the temperature of the inlet water in the energy storage water circulation loop is relatively low, and the temperature of the outlet water is relatively high. By opening the first valve 423 and the fourth valve 426, and closing the second valve 424 and the third valve 425, the energy storage water with a relatively low temperature in the lower part of the energy storage water tank 420 can enter the energy storage water circulation loop through the second water distributor 4222 and the fourth valve 426, and the energy storage water with a relatively high temperature after heat exchange with the condenser 120 in the energy storage water circulation loop can enter the upper part of the energy storage water tank 420 through the first valve 423 and the first water distributor 4221.

[0137] After the water supply temperature of the cold user 220 in S320 is greater than the first preset cold water supply temperature, and the water supply temperature of the hot user 340 is less than the first preset hot water supply temperature, the control method of the air conditioning system further includes:

[0138] The first valve 423 and the fourth valve 426 are closed, and the second valve 424 and the third valve 425 are opened.

[0139] When the water supply temperature of the cold user 220 is less than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot water circulation pipeline 300 is less than the first preset hot water supply temperature, the refrigeration circulation loop 100 is in a heating state. At this time, the energy storage water circulation loop mainly exchanges heat with the evaporator 110 to use the heat of the energy storage water in the energy storage water circulation loop to heat the circulating hot water in the hot water circulation pipeline 300. Therefore, the inlet water temperature of the intermediate water circulation pipeline 400 is higher and the outlet water temperature is lower. By closing the first valve 423 and the fourth valve 426 and opening the second valve 424 and the third valve 425, the energy storage water with a higher temperature at the upper part of the energy storage water tank 420 can enter the intermediate water circulation pipeline 400 through the first water distributor 4221 and the second valve 424, and the energy storage water with a lower temperature in the intermediate water circulation pipeline 400 after heat exchange with the evaporator 110 can enter the upper part of the energy storage water tank 420 through the third valve 425 and the second water distributor 4222, thereby ensuring the heat exchange efficiency between the energy storage water and the circulating hot water.

[0140] As a possible implementation, after the air conditioning system is shut down, see Figure 7 , the control method of the air conditioning system also includes:

[0141] S900: Receive the temperature of the energy storage water in the energy storage water tank 420.

[0142] S910: Compare the temperature of the energy storage water in the energy storage water pool 420 with the first preset energy storage temperature and the second preset energy storage temperature, wherein the first preset energy storage temperature is greater than the second preset energy storage temperature. It should be noted that the first preset energy storage temperature and the second preset energy storage temperature can be selected according to actual conditions. For example, the first preset energy storage temperature can be 30°C. The second preset energy storage temperature can be 7°C.

[0143] S911: If the temperature of the energy storage water in the energy storage tank 420 is greater than the first preset energy storage temperature, the heat balance device 600 is controlled to cool the energy storage water in the energy storage tank 420. The temperature of the energy storage water in the energy storage tank 420 is greater than the first preset energy storage temperature, indicating that the temperature of the energy storage water in the energy storage tank 420 is relatively high. At this time, when the intermediate water circulation pipeline 400 exchanges heat with the condenser 120, the intermediate water circulation pipeline 400 cannot take away the heat of the refrigerant in the condenser 120, resulting in the refrigerant being unable to liquefy and exchange heat with the cold water circulation pipeline 200, thereby causing the cold water circulation pipeline 200 to be unable to meet the user's cooling needs. Controlling the heat balance device 600 to cool the energy storage water in the energy storage tank 420 can reduce the temperature of the energy storage water in the energy storage tank 420, ensuring that the energy storage water in the energy storage water circulation loop can take away the heat of the circulating cold water in the cold water circulation pipeline 200, thereby enabling the air conditioning system to meet the user's cooling needs.

[0144] S912: If the temperature of the energy storage water in the energy storage tank 420 is lower than the second preset energy storage temperature, the heat balance device 600 is controlled to heat the energy storage water in the energy storage tank 420. When the temperature of the energy storage water in the energy storage tank 420 is lower than the second preset energy storage temperature, it means that the temperature of the energy storage water in the energy storage tank 420 is relatively low. At this time, when the intermediate water circulation pipeline 400 exchanges heat with the evaporator 110, the temperature of the intermediate water circulation pipeline 400 is relatively low and cannot make the refrigerant in the evaporator 110 absorb heat and evaporate, resulting in the heat of the energy storage water in the intermediate water circulation pipeline 400 being unable to heat the domestic hot water in the hot water circulation pipeline, thereby causing the hot water circulation pipeline to be unable to meet the user's heat demand. Controlling the heat balance device 600 to heat the energy storage water in the energy storage tank 420 can increase the temperature of the energy storage water in the energy storage tank 420, and ensure that the heat of the energy storage water in the energy storage water circulation loop can be transferred to the hot water circulation pipeline, so that the air conditioning system can meet the user's cooling needs.

[0145] Specifically, when the heat balance device 600 includes a heat exchanger 620, and the water inlet of the heat exchanger 620 is connected to the first valve 423 and the third valve 425 through the heat balance circulation pump 611 group 610, and the water outlet of the heat exchanger 620 is connected to the second valve 424 and the fourth valve 426; a plurality of temperature detection devices 427 are arranged in the energy storage tank 420 along the height direction, the heat balance circulation pump 611 group 610 has a plurality of heat balance circulation pumps 611 arranged in parallel, and the plurality of temperature detection devices 427 correspond to the plurality of heat balance circulation pumps 611 one by one, the above S800 is specifically:

[0146] The temperature of the energy storage water in the energy storage tank 420 measured by each temperature detection device 427 is respectively received. At this time, the controller can receive the temperature of the energy storage water at different heights of the energy storage tank 420, so as to obtain the temperature in the energy storage tank 420 more accurately.

[0147] S900 specifically includes: comparing the temperature of the energy storage water in the energy storage water tank 420 measured by each temperature detection device 427 with the first preset energy storage temperature and the second preset energy storage temperature.

[0148] S000A is specifically: if the temperature of the energy storage water tank 420 measured by a detection device is greater than the first preset energy storage temperature, the heat balance circulation pump 611 corresponding to the detection device is controlled to open, so that the heat exchanger 620 can cool the energy storage water in the energy storage water tank 420, so that the efficiency of heat exchange between the heat exchanger and the energy storage water tank 420 can be controlled according to the actual temperature conditions in the energy storage water tank 420.

[0149] S000B specifically means: if the temperature of the energy storage water tank 420 measured by a detection device is lower than the second preset energy storage temperature, the heat balance circulation pump 611 corresponding to the detection device is controlled to open, so that the heat exchanger 620 heats the energy storage water in the energy storage water tank 420, thereby improving the efficiency of heat exchange between the heat exchanger and the energy storage water tank 420.

[0150] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0151] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioning system, characterized in that: include: A refrigeration cycle loop, with an evaporator, a condenser and a compressor connected in series; The cold water circulation pipeline is connected in series with a cold water circulation pump and cold users; Hot water circulation pipeline, with hot water circulation pump and heat users connected in series; An intermediate water circulation pipeline, in which an intermediate water circulation pump and an energy storage tank are connected in series; a heat balance device, for adjusting the temperature of the energy storage water in the energy storage tank; The heat balance device comprises a heat balance circulation pipeline, and the heat balance circulation pipeline is serially connected with a heat exchanger and a heat balance circulation pump group; A plurality of temperature detection devices are arranged in the body of the energy storage water tank along the height direction, the heat balance circulation pump group includes a plurality of heat balance circulation pumps arranged in parallel, and the number of the plurality of temperature detection devices is the same as the number of the plurality of heat balance circulation pumps; An evaporation chamber and a condensation chamber, wherein the evaporation chamber is used to exchange heat with the evaporator, and the condensation chamber is used to exchange heat with the condenser. The evaporation chamber is connected in series with both the cold water circulation pipeline and the intermediate water circulation pipeline, and the condensation chamber is connected in series with both the hot water circulation pipeline and the intermediate water circulation pipeline; A valve assembly is used to switch the evaporation chamber between being connected to the cold water circulation pipeline and being connected to the intermediate water circulation pipeline; the valve assembly is also used to switch the condensation chamber between being connected to the hot water circulation pipeline and being connected to the intermediate water circulation pipeline.

2. The air conditioning system according to claim 1, characterized in that: The evaporator is a shell and tube evaporator, the evaporation chamber is surrounded by the shell of the evaporator, and the refrigeration cycle is connected in series with the pipeline of the evaporator; The condenser is a shell and tube condenser, the condensation chamber is surrounded by the shell of the condenser, and the refrigeration cycle is connected in series with the pipeline of the condenser.

3. The air conditioning system according to claim 2, characterized in that: The valve assembly includes a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve; The cold water circulation pipeline includes a cold water supply pipe and a cold water return pipe, and the cold water supply pipe, the cold water user and the cold water return pipe are connected in series in sequence; The hot water circulation pipeline comprises a hot water supply pipe and a hot water return pipe, wherein the hot water supply pipe, the hot water user and the hot water return pipe are connected in series in sequence; The intermediate water circulation pipeline includes an intermediate water supply pipe and an intermediate water return pipe, and the intermediate water return pipe, the energy storage tank and the intermediate water supply pipe are connected in series in sequence; The first end of the first three-way valve is communicated with the water inlet of the shell of the evaporator, the second end of the first three-way valve is communicated with the cold water return pipe, and the third end of the first three-way valve is communicated with the intermediate water return pipe; The first end of the second three-way valve is communicated with the water outlet of the shell of the evaporator, the second end of the second three-way valve is communicated with the cold water supply pipe, and the third end of the second three-way valve is communicated with the intermediate water supply pipe; The first end of the third three-way valve is communicated with the water inlet of the shell of the condenser, the second end of the third three-way valve is communicated with the intermediate water return pipe, and the third end of the third three-way valve is communicated with the hot water return pipe; The first end of the fourth three-way valve is communicated with the water outlet of the shell of the condenser, the second end of the fourth three-way valve is communicated with the intermediate water supply pipe, and the third end of the fourth three-way valve is communicated with the hot water supply pipe.

4. The air conditioning system according to claim 1, characterized in that: The energy storage water tank comprises an energy storage water tank body and a water distribution device arranged in the energy storage water tank body; the water distribution device is connected in series with the intermediate water circulation pipeline.

5. The air conditioning system according to claim 4, characterized in that: The water distribution device includes a first water distributor and a second water distributor arranged in parallel, the first water distributor is higher than the second water distributor, the water inlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a first valve, and the water outlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a second valve; the water inlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a third valve, and the water outlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a fourth valve.

6. The air conditioning system according to claim 5, characterized in that: The heat balance device includes a boiler and an air-cooled chiller. The heat balance circulation pipeline is connected in series with the first water distributor through the first valve and the second valve. The heat balance circulation pipeline is connected in series with the third valve and the fourth valve.

7. The air conditioning system according to claim 6, characterized in that: The air-conditioning system comprises at least two refrigeration cycle loops, at least two evaporation chambers, at least two condensation chambers, and at least two valve assemblies. The at least two evaporation chambers and the at least two condensation chambers correspond one-to-one to the at least two refrigeration cycle loops; the at least two valve assemblies correspond one-to-one to the at least two evaporation chambers, and the at least two valve assemblies also correspond one-to-one to the at least two condensation chambers.

8. A control method for an air conditioning system as claimed in claim 1, characterized in that: include: Receiving the water supply temperature of the cold user and the water supply temperature of the hot user in real time; comparing the water supply temperature of the cold user with a first preset cold water supply temperature; comparing the water supply temperature of the heat user with a first preset hot water supply temperature; When the water supply temperature of the hot user is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user is greater than or equal to the first preset cold water supply temperature, the refrigeration cycle is in a refrigeration condition; When the water supply temperature of the cold user is lower than the first preset cold water supply temperature, and the water supply temperature of the hot user is lower than or equal to the first preset hot water supply temperature, the refrigeration cycle is placed in a heating state; When the water supply temperature of the cold user is greater than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot user is less than or equal to the first preset hot water supply temperature, the refrigeration cycle is placed in a cold and hot working state; When the water supply temperature of the hot user is greater than the first preset hot water supply temperature, and the water supply temperature of the cold user is less than the first preset cold water supply temperature, shutting down the air conditioning system; Wherein, placing the refrigeration cycle in a refrigeration condition comprises: Control the cold water circulation pump and the intermediate water circulation pump to be in working state, and the hot water circulation pump to be in stopping state; at the same time, control the valve assembly to make the evaporation chamber communicate with the cold water circulation pipeline, and make the condensation chamber communicate with the intermediate water circulation pipeline; The step of placing the refrigeration cycle in a heating state is specifically as follows: Control the hot water circulation pump and the intermediate water circulation pump to be in working state, and the cold water circulation pump to be in shutdown state; at the same time, control the valve assembly to connect the evaporation chamber with the intermediate water circulation pipeline, and connect the condensation chamber with the hot water circulation pipeline; The step of placing the refrigeration cycle in a cold or hot working state is specifically as follows: Control the cold water circulation pump and the hot water circulation pump to be in working state, and the intermediate water circulation pump to be in shutdown state; at the same time, control the valve assembly to connect the evaporation chamber with the cold water circulation pipeline, and connect the condensation chamber with the hot water circulation pipeline; The shutting down of the air conditioning system comprises: The cold water circulation pump, the hot water circulation pump and the intermediate water circulation pump are all in a shutdown state.

9. The control method of the air conditioning system according to claim 8, characterized in that: When the valve assembly includes a first three-way valve, a second three-way valve, a third three-way valve and a fourth three-way valve; The cold water circulation pipeline includes a cold water supply pipe and a cold water return pipe, and the cold water supply pipe, the cold water user and the cold water return pipe are connected in series in sequence; The hot water circulation pipeline comprises a hot water supply pipe and a hot water return pipe, wherein the hot water supply pipe, the hot water user and the hot water return pipe are connected in series in sequence; The intermediate water circulation pipeline includes an intermediate water supply pipe and an intermediate water return pipe, and the intermediate water return pipe, the energy storage tank and the intermediate water supply pipe are connected in series in sequence; The first end of the first three-way valve is communicated with the water inlet of the shell of the evaporator, the second end of the first three-way valve is communicated with the cold water return pipe, and the third end of the first three-way valve is communicated with the intermediate water return pipe; The first end of the second three-way valve is communicated with the water outlet of the shell of the evaporator, the second end of the second three-way valve is communicated with the cold water supply pipe, and the third end of the second three-way valve is communicated with the intermediate water supply pipe; The first end of the third three-way valve is communicated with the water inlet of the shell of the condenser, the second end of the third three-way valve is communicated with the intermediate water return pipe, and the third end of the third three-way valve is communicated with the hot water return pipe; When the first end of the fourth three-way valve is connected to the water outlet of the shell of the condenser, the second end of the fourth three-way valve is connected to the intermediate water supply pipe, and the third end of the fourth three-way valve is connected to the hot water supply pipe, the control valve assembly connects the evaporation chamber with the cold water circulation pipeline and connects the condensation chamber with the intermediate water circulation pipeline. Specifically: Control the first end of the first three-way valve to be in communication with the second end, the first end of the second three-way valve to be in communication with the second end; the first end of the third three-way valve to be in communication with the second end, and the first end of the fourth three-way valve to be in communication with the second end; The control valve assembly enables the evaporation chamber to communicate with the intermediate water circulation pipeline, and enables the condensation chamber to communicate with the hot water circulation pipeline, specifically: Control the first end of the first three-way valve to be connected to the third end, the first end of the second three-way valve to be connected to the third end, the first end of the third three-way valve to be connected to the third end, and the first end of the fourth three-way valve to be connected to the third end; The control valve assembly connects the evaporation chamber to the cold water circulation pipeline and connects the condensation chamber to the hot water circulation pipeline as follows: The first end of the first three-way valve is connected to the second end, the first end of the second three-way valve is connected to the second end, the first end of the third three-way valve is connected to the third end, and the first end of the fourth three-way valve is connected to the third end.

10. The control method of the air conditioning system according to claim 8, characterized in that: When the air conditioning system comprises at least two refrigeration cycle loops, at least two evaporation chambers, at least two condensation chambers, and at least two valve assemblies, and the at least two evaporation chambers and the at least two condensation chambers correspond one-to-one to the at least two refrigeration cycle loops; the at least two valve assemblies correspond one-to-one to the at least two evaporation chambers, and the at least two valve assemblies also correspond one-to-one to the at least two condensation chambers, when the water supply temperature of the cold user is greater than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot user is less than or equal to the first preset hot water supply temperature, the control method of the air conditioning system further comprises: Comparing the water supply temperature of the cold user with a second preset cold water supply temperature, wherein the second preset cold water supply temperature is greater than the first preset cold water supply temperature; When the water supply temperature of the cold user is lower than the second preset cold water supply temperature, one of the refrigeration cycles is placed in a cooling and heating condition; and the remaining refrigeration cycles are placed in a heating condition.

11. The control method of the air conditioning system according to claim 10, characterized in that: Putting one of the refrigeration cycle loops in a cold or hot working condition; After the remaining refrigeration cycles are placed in a heating state, the air conditioning system control method further includes: A first comparison step: comparing the water supply temperature of the cold user with the first preset cold water supply temperature; The first step of adding a cold and hot working condition: if the water supply temperature of the cold user is greater than the first preset cold water supply temperature, controlling a refrigeration cycle loop in a heating working condition to switch to a cold and hot working condition; Repeat the first comparison step and the first step of adding cold and hot working conditions until the water supply temperature of the cold user is less than or equal to the first preset cold water supply temperature, or all the refrigeration cycle loops are in the refrigeration condition.

12. The control method of the air conditioning system according to claim 10, characterized in that: When the energy storage tank includes an energy storage tank body and a water distribution device arranged in the energy storage tank body; the water distribution device includes a first water distributor and a second water distributor arranged in parallel, the water inlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a first valve, and the water outlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a second valve; the water inlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a third valve, and the water outlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a fourth valve, after the water supply temperature of the cold user is less than the second preset cold water supply temperature, the control method of the air conditioning system also includes: The second valve and the third valve are opened, and the first valve and the fourth valve are closed.

13. The control method of the air conditioning system according to claim 8, characterized in that: When the air conditioning system includes at least two refrigeration circulation circuits and at least two valve assemblies, and the at least two refrigeration circulation circuits correspond to the at least two valve assemblies one by one, and the valve assemblies can control the evaporator in the corresponding refrigeration circulation circuit to switch between heat exchange with the cold water circulation pipeline and heat exchange with the intermediate water circulation pipeline, and the condenser to switch between heat exchange with the hot water circulation pipeline and heat exchange with the intermediate water circulation pipeline, after the water supply temperature of the cold user is greater than the first preset cold water supply temperature, and the water supply temperature of the hot user is less than the first preset hot water supply temperature, the control method of the air conditioning system also includes: comparing the water supply temperature of the heat user with a second preset hot water supply temperature, wherein the second preset hot water supply temperature is lower than the first preset hot water supply temperature; When the water supply temperature of the heat user is greater than the second preset hot water supply temperature, one of the refrigeration cycle loops is controlled to be in a cooling and heating condition, and the other refrigeration cycle loops are controlled to be in a cooling condition.

14. The control method of the air conditioning system according to claim 13, characterized in that: After controlling one of the refrigeration cycles to be in a cooling and heating condition and the other refrigeration cycles to be in a cooling condition, the control method of the air conditioning system further includes: A second comparison step: comparing the current water supply temperature of the hot water user with the first preset hot water supply temperature; The second step of adding a cold and hot working condition: if the water supply temperature of the current hot user is lower than the first preset hot water supply temperature, controlling the refrigeration cycle loop in the cooling working condition to switch to the cold and hot working condition; Repeat the second comparison step and the second step of adding hot and cold working conditions until the water supply temperature of the hot user is greater than or equal to the first preset hot water supply temperature, or all the refrigeration cycle loops are in the heating working condition.

15. The control method of the air conditioning system according to claim 13, characterized in that: When the energy storage tank includes an energy storage tank body and a water distribution device arranged in the energy storage tank body; the water distribution device includes a first water distributor and a second water distributor arranged in parallel, the water inlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a first valve, and the water outlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a second valve; the water inlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a third valve, and the water outlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a fourth valve, after the water supply temperature of the heat user is greater than the second preset hot water supply temperature, the control method of the air conditioning system also includes: The first valve and the fourth valve are controlled to be opened, and the second valve and the third valve are controlled to be closed.

16. The control method of the air conditioning system according to any one of claims 8 to 15, characterized in that: When the energy storage water tank comprises an energy storage water tank body and a water distribution device arranged in the energy storage water tank body; the water distribution device comprises a first water distributor and a second water distributor arranged in parallel, the water inlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a first valve, and the water outlet end of the first water distributor is connected in series with the intermediate water circulation pipeline through a second valve; the water inlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a third valve, and the water outlet end of the second water distributor is connected in series with the intermediate water circulation pipeline through a fourth valve, after the water supply temperature of the hot water circulation pipeline is greater than or equal to the first preset hot water supply temperature, the control method of the air conditioner further comprises: opening the first valve and the fourth valve, and closing the second valve and the third valve; and / or, After the water supply temperature of the cold user is less than or equal to the first preset cold water supply temperature, and the water supply temperature of the hot water circulation pipeline is less than the first preset hot water supply temperature, the control method of the air conditioning system further includes: The first valve and the fourth valve are closed, and the second valve and the third valve are opened.

17. The control method of the air conditioning system according to claim 12 or 15, characterized in that: After the air conditioning system is shut down, the control method of the air conditioning system further includes: receiving the temperature of the intermediate water in the energy storage tank; Comparing the temperature of the intermediate water in the energy storage tank with a first preset energy storage temperature and a second preset energy storage temperature, wherein the first preset energy storage temperature is greater than the second preset energy storage temperature; If the temperature of the intermediate water in the energy storage tank is greater than the first preset energy storage temperature, controlling the heat balance device to cool the intermediate water in the energy storage tank; If the temperature of the intermediate water in the energy storage tank is lower than the second preset energy storage temperature, the heat balance device is controlled to heat the intermediate water in the energy storage tank.

18. The control method of the air conditioning system according to claim 17, characterized in that: When the heat balance device includes a heat exchanger, and the water inlet of the heat exchanger is connected to the first valve and the third valve through a heat balance circulation pump group, and the water outlet of the heat exchanger is connected to the second valve and the fourth valve; a plurality of temperature detection devices are arranged in the energy storage water tank along the height direction, the heat balance circulation pump group has a plurality of heat balance circulation pumps arranged in parallel, and the plurality of temperature detection devices correspond to the plurality of heat balance circulation pumps one by one, the temperature of the energy storage water received in the energy storage water tank is specifically: Receiving the temperature of the middle water in the energy storage tank measured by each temperature detection device respectively; The comparison of the temperature of the intermediate water in the energy storage tank with the first preset energy storage temperature and the second preset energy storage temperature is specifically: Respectively comparing the temperature of the intermediate water in the energy storage water tank measured by each of the temperature detection devices with the first preset energy storage temperature and the second preset energy storage temperature; If the temperature of the intermediate water in the energy storage tank is greater than the first preset energy storage temperature, controlling the heat balance device to cool the intermediate water in the energy storage tank is specifically as follows: If the temperature of the intermediate water in the energy storage tank measured by a detection device is greater than the first preset energy storage temperature, the heat balance circulation pump corresponding to the detection device is controlled to open, so that the heat exchanger cools the intermediate water in the energy storage tank; If the temperature of the intermediate water in the energy storage tank is lower than the second preset energy storage temperature, controlling the heat balance device to heat the intermediate water in the energy storage tank is specifically as follows: If the temperature of the intermediate water in the energy storage tank measured by a detection device is lower than the second preset energy storage temperature, the heat balance circulation pump corresponding to the detection device is controlled to open so that the heat exchanger heats the intermediate water in the energy storage tank.

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