A modular air-cooled hot and cold water system

Abstract

The present invention provides a modular air-cooled hot and cold water system, which relates to the technical field of air conditioning. The modular air-cooled hot and cold water system comprises a solar water tank, an insulated water tank, an outdoor unit, an indoor unit, a first pipeline and a second pipeline. The outdoor unit, the first pipeline, the indoor unit and the second pipeline are connected end to end in sequence to form a circulation loop. The insulated water tank is connected to the first pipeline and the second pipeline respectively through pipelines, and the solar water tank is connected to the insulated water tank. In this way, the modular air-cooled hot and cold water system can save a lot of electricity bills, the insulated water tank can supplement the cold capacity in summer, and the insulated water tank can supplement the domestic hot water in winter, so that users can get a more comfortable experience, with strong reliability, simple operation, less unit shutdown times, and high system stability.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a modular air-cooled hot and cold water system. Background Art

[0002] With the popularity of central air conditioning, many large centralized buildings, such as hotels, office buildings, etc., will choose to use modular air-cooled hot and cold water units for cooling and heating. However, large modular air-cooled hot and cold water units also have some disadvantages:

[0003] 1. Modular machines generally have high power, especially in hot summer or cold winter seasons, when there are dense crowds during the day and the demand for cooling and heating is high, so electricity bills are a huge expense;

[0004] 2. On the one hand, due to the heat storage capacity of building walls, the cooling load is highest in the summer between 2:00-4:00 p.m.; on the other hand, the hot outdoor environment will cause the unit's heating capacity to decrease. In both cases, the unit's cooling capacity may be less than the indoor cooling capacity, resulting in a poor user experience;

[0005] 3. When the ambient temperature required by the user is reached, the unit will automatically shut down and restart the refrigeration when the indoor temperature is too high. Repeated start and stop will cause damage to the unit and affect its life.

[0006] The hot water system of a building generally uses a solar energy system. In the summer, there is sufficient sunlight during the day and the water in the water tank can meet the needs of users. However, in the winter, the light intensity is poor and the water storage temperature in the water tank is insufficient, making it difficult to meet user needs. Generally, a gas furnace is used for auxiliary heating, which results in more equipment, low efficiency of the gas furnace, difficult control, and higher risk.

[0007] Therefore, designing a modular air-cooled hot and cold water unit system that can save electricity, enhance refrigeration in summer, and supplement domestic hot water in winter is a technical problem that urgently needs to be solved. Summary of the invention

[0008] The problem solved by the present invention is that the air-cooled hot and cold water unit has a high electricity cost and is often started and stopped repeatedly. In summer, the cooling capacity of the unit may be less than the cooling capacity required indoors, resulting in a poor user experience.

[0009] To solve the above problem, the present invention provides a modular air-cooled hot and cold water system, which includes a solar water heater, an insulated water tank, an outdoor unit, an indoor unit, a first pipeline and a second pipeline. The outdoor unit, the first pipeline, the indoor unit and the second pipeline are connected end to end in sequence to form a circulation loop. The insulated water tank is connected to the first pipeline and the second pipeline respectively through pipelines, and the solar water heater is connected to the insulated water tank.

[0010] In this way, first, in the summer nights, under the premise of meeting the needs of the user end, the unit does not need to shut down, but automatically switches the heat source side from the indoor unit to the insulated water tank, and exchanges heat for the water in the insulated water tank until the water temperature in the insulated water tank reaches the set temperature; secondly, after the water in the insulated water tank has been heat exchanged in the shell and tube of the outdoor unit for many times, the water temperature is reduced, and energy storage can be achieved, and the same is true for hot water production in winter; then, in the summer, at the maximum cooling load stage, the unit shuts down to dissipate heat, and uses the water in the insulated water tank for heat exchange to enhance the user experience; finally, in winter, under the premise of meeting the needs of the user end, the hot water produced by the unit is stored in the solar water tank for user use. The modular air-cooled hot and cold water system can save a lot of electricity bills, the insulated water tank can supplement the cooling capacity in summer, and the insulated water tank can supplement the domestic hot water in winter, so that users can have a more comfortable experience, with strong reliability, simple operation, less unit shutdown times, and high system stability.

[0011] Furthermore, the modular air-cooled hot and cold water system also includes a first valve, a second valve and a first water pump, the first valve is arranged on the first pipeline, and the second valve and the first water pump are arranged on the second pipeline.

[0012] Furthermore, the modular air-cooled hot and cold water system also includes a third pipeline, a fourth pipeline, a third valve and a fourth valve. The insulated water tank is connected to the first pipeline through the third pipeline and is located between the outdoor unit and the first valve. The third valve is arranged on the third pipeline. The insulated water tank is connected to the second pipeline through the fourth pipeline and is located between the first water pump and the second valve. The fourth valve is arranged on the fourth pipeline.

[0013] Furthermore, the modular air-cooled hot and cold water system also includes a fifth pipeline, a sixth pipeline, a fifth valve, a sixth valve and a second water pump. The insulated water tank is connected to the first pipeline through the fifth pipeline and is located between the first valve and the indoor unit. The fifth valve is arranged on the fifth pipeline. The insulated water tank is connected to the second pipeline through the sixth pipeline and is located between the second valve and the indoor unit. The sixth valve and the second water pump are arranged on the sixth pipeline.

[0014] Furthermore, the modular air-cooled hot and cold water system also includes a seventh pipeline and a seventh valve. The solar water heater tank is connected to the insulated water tank via the seventh pipeline, and the seventh valve is arranged on the seventh pipeline.

[0015] In this way, the direction of water flow in the system can be flexibly adjusted through valves and water pumps to achieve the effect of enhanced cooling in summer and supplementary domestic hot water in winter.

[0016] Furthermore, the solar water heater comprises a domestic hot water tank and a solar water heater, and the solar water heater is installed on the top of the domestic hot water tank to heat the water in the domestic hot water tank.

[0017] Furthermore, the modular air-cooled hot and cold water system also includes a controller and a first temperature sensing probe and a second temperature sensing probe electrically connected to the controller, wherein the first temperature sensing probe is installed on the solar water heater tank for detecting the water temperature Tr in the solar water heater tank, and the second temperature sensing probe is installed on the insulated water tank for detecting the water temperature Ts in the insulated water tank, and the controller is used to control the water flow direction in the system according to the water temperature Tr and the water temperature Ts.

[0018] Furthermore, the modular air-cooled hot and cold water system further comprises a third temperature sensing probe electrically connected to the controller, the third temperature sensing probe being used to detect the indoor ambient temperature Tn, and the controller being used when the indoor ambient temperature Tn;

[0019] When the indoor environment temperature Tn is less than or equal to the first preset temperature T1, the controller is used to control the water flow to flow in the loop formed by the thermal insulation water tank and the outdoor unit;

[0020] When the indoor environment temperature Tn is greater than or equal to a second preset temperature T2, the controller is used to control the water flow to flow in the loop formed by the outdoor unit and the indoor unit.

[0021] Furthermore, the modular air-cooled hot and cold water system further comprises a fourth temperature sensing probe electrically connected to the controller, the fourth temperature sensing probe being used to detect the water temperature TL in the outdoor unit;

[0022] When the water temperature TL is greater than or equal to the third preset temperature T3 or the indoor environment temperature Tn is greater than or equal to the fourth preset temperature T4, the controller is used to control the water flow to flow in the loop formed by the thermal insulation water tank and the indoor unit;

[0023] When the water temperature Ts is greater than or equal to a fifth preset temperature T5, the controller is used to control the water flow to flow in the loop formed by the outdoor unit and the indoor unit.

[0024] Furthermore, when the water temperature Tr is less than or equal to the sixth preset temperature T6, the controller is used to control the water flow to flow in the loop formed by the thermal insulation water tank and the solar water heater tank.

[0025] In this way, the controller can control the direction of water flow in the system, take advantage of the low electricity consumption at night, store cold energy at a low electricity cost, and save electricity costs. When the indoor cold load is greater than the air conditioning refrigeration capacity and the refrigeration effect is poor, the stored cold energy can be used as supplementary cold energy to enhance the refrigeration effect and user experience. In winter, when solar energy cannot meet the demand for hot water, it can supplement the demand for hot water, which is more efficient and stable than gas furnaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A block diagram of the components of a modular air-cooled hot and cold water system provided in an embodiment of the present invention.

[0027] Figure 2 This is a connection diagram of the controller.

[0028] Figure 3 A flowchart of the cooling mode of the modular air-cooled hot and cold water system provided in an embodiment of the present invention.

[0029] Figure 4 A flowchart of the heating mode of the modular air-cooled hot and cold water system provided in an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1- Modular air-cooled hot and cold water system; 2- Controller; 3- Solar water tank; 4- Domestic hot water tank; 5- Solar water heater; 6- Insulated water tank; 7- Outdoor unit; 8- Indoor unit; 9- First pipeline; 10- Second pipeline; 11- Third pipeline; 12- Fourth pipeline; 13- Fifth pipeline; 14- Sixth pipeline; 15- Seventh pipeline; 16- First valve; 17- Second valve; 18- Third valve; 19- Fourth valve; 20- Fifth valve; 21- Sixth valve; 22- Seventh valve; 23- First water pump; 24- Second water pump; 25- First temperature probe; 26- Second temperature probe; 27- Third temperature probe; 28- Fourth temperature probe. DETAILED DESCRIPTION

[0032] Existing modular air-cooled hot and cold water units have high power and high electricity costs. In summer, the cooling capacity of the unit may be less than the cooling capacity required indoors, resulting in a poor user experience. When the ambient temperature required by the user is reached, the unit will automatically shut down, and restart the cooling when the indoor temperature is too high. Repeated start and stop will cause damage to the unit and shorten its life. Existing solar energy systems generally use gas furnaces for auxiliary heating in winter, resulting in more equipment, low efficiency of gas furnaces, difficult control, and high risk.

[0033] In order to solve the technical problems that the existing air-cooled hot and cold water units have high electricity costs, are often started and stopped, and the cooling capacity of the units in summer may be less than the cooling capacity required indoors, resulting in a poor user experience, as well as the technical problems that the existing solar energy system has many equipment, low gas furnace efficiency, difficult control, and high risk, an embodiment of the present invention provides a modular air-cooled hot and cold water system.

[0034] In order to make the objects, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] Please refer to Figure 1 and Figure 2 The modular air-cooled hot and cold water system 1 provided in this embodiment includes a controller 2 and a solar water heater 3, an insulated water tank 6, an outdoor unit 7, an indoor unit 8, a first pipeline 9, a second pipeline 10, a third pipeline 11, a fourth pipeline 12, a fifth pipeline 13, a sixth pipeline 14, a seventh pipeline 15, a first valve 16, a second valve 17, a third valve 18, a fourth valve 19, a fifth valve 20, a sixth valve 21, a seventh valve 22, a first water pump 23, a second water pump 24, a first temperature sensor 25, a second temperature sensor 26, a third temperature sensor 27 and a fourth temperature sensor 28. Among them, this system is a water machine system, and water flows in each pipeline.

[0036] The outdoor unit 7, the first pipeline 9, the indoor unit 8 and the second pipeline 10 are connected end to end in sequence to form a circulation loop. The first valve 16 is arranged on the first pipeline 9, and the second valve 17 and the first water pump 23 are arranged on the second pipeline 10.

[0037] The insulated water tank 6 is connected to the first pipeline 9 and the second pipeline 10 through pipelines. Specifically, the insulated water tank 6 is connected to the first pipeline 9 through the third pipeline 11 and is located between the outdoor unit 7 and the first valve 16. The third valve 18 is arranged on the third pipeline 11. The insulated water tank 6 is also connected to the first pipeline 9 through the fifth pipeline 13 and is located between the first valve 16 and the indoor unit 8. The fifth valve 20 is arranged on the fifth pipeline 13.

[0038] The heat preservation water tank 6 is connected to the second pipeline 10 through the fourth pipeline 12 and is located between the first water pump 23 and the second valve 17. The fourth valve 19 is arranged on the fourth pipeline 12. The heat preservation water tank 6 is also connected to the second pipeline 10 through the sixth pipeline 14 and is located between the second valve 17 and the indoor unit 8. The sixth valve 21 and the second water pump 24 are arranged on the sixth pipeline 14.

[0039] The solar water tank 3 is connected to the insulated water tank 6 through the seventh pipeline 15, and the seventh valve 22 is arranged on the seventh pipeline 15. The solar water tank 3 includes a domestic hot water tank 4 and a solar water heater 5, and the solar water heater 5 is installed on the top of the domestic hot water tank 4 to heat the water in the domestic hot water tank 4.

[0040] The first temperature sensing probe 25 is installed on the solar water heater 3, and is used to detect the water temperature Tr in the solar water heater 3. The second temperature sensing probe 26 is installed on the insulated water tank 6, and is used to detect the water temperature Ts in the insulated water tank 6. The third temperature sensing probe 27 is used to detect the indoor ambient temperature Tn. The controller 2 is used to detect the indoor ambient temperature Tn. The fourth temperature sensing probe 28 is used to detect the water temperature TL in the outdoor unit 7.

[0041] Please refer to Figure 2 The outdoor unit 7, the indoor unit 8, the first valve 16, the second valve 17, the third valve 18, the fourth valve 19, the fifth valve 20, the sixth valve 21, the seventh valve 22, the first water pump 23, the second water pump 24, the first temperature probe 25, the second temperature probe 26, the third temperature probe 27 and the fourth temperature probe 28 are all electrically connected to the controller 2. The controller 2 can select a processor with a central control function, and specifically, a single-chip microcomputer PLC can be selected.

[0042] The first valve 16, the second valve 17, the third valve 18, the fourth valve 19, the fifth valve 20, the sixth valve 21 and the seventh valve 22 are valves with on and off functions, and specifically, butterfly valves or solenoid valves may be selected.

[0043] In this embodiment, the third valve 18, the fourth valve 19, the fifth valve 20, the sixth valve 21, and the seventh valve 22 are all installed on the pipeline. In other embodiments, these valves can also be installed inside the insulated water tank 6, or arranged in a centralized position for easy inspection and maintenance.

[0044] The modes of the modular air-cooled hot and cold water system 1 provided in this embodiment include at least a cooling mode, a heating mode and an energy storage mode.

[0045] 1. The working process of cooling mode is as follows:

[0046] S11: Please refer to Figure 3 , control the water temperature Ts in the thermal insulation water tank 6 to decrease and realize energy storage.

[0047] Specifically, usually after 22:00 at night, when the indoor ambient temperature Tn is less than or equal to the first preset temperature T1, the controller 2 controls the first valve 16, the second valve 17, the fifth valve 20, the sixth valve 21, and the seventh valve 22 to be turned off, and controls the third valve 18 and the fourth valve 19 to be turned on, so that water flows in the loop formed by the thermal insulation water tank 6 and the outdoor unit 7, thereby reducing the water temperature Ts in the thermal insulation water tank 6 and realizing energy storage. It can be set that when Ts is less than or equal to 5°C, the third valve 18 and the fourth valve 19 are controlled to be turned off, and the energy storage ends.

[0048] S12: Control the indoor ambient temperature Tn to decrease and achieve cooling.

[0049] On the one hand, when the indoor ambient temperature Tn is greater than or equal to the second preset temperature T2, the controller 2 controls the third valve 18, the fourth valve 19, the fifth valve 20, the sixth valve 21, and the seventh valve 22 to be closed, and controls the first valve 16 and the second valve 17 to be turned on, so that water flows in the loop formed by the outdoor unit 7 and the indoor unit 8, thereby transporting refrigerant to the indoor unit 8, reducing the indoor ambient temperature Tn, and achieving indoor cooling.

[0050] The second preset temperature T2 may be 5° C. higher than the first preset temperature T1.

[0051] On the other hand, when the water temperature TL in the outdoor unit 7 is greater than or equal to the third preset temperature T3 or the indoor environment temperature Tn is greater than or equal to the fourth preset temperature T4, the controller 2 controls the first water pump 23 and the outdoor unit 7 to be turned off, controls the first valve 16 and the second valve 17 to be turned off, controls the second water pump 24 to be turned on, controls the fifth valve 20 and the sixth valve 21 to be turned on, so that the water flows in the loop formed by the insulated water tank 6 and the indoor unit 8, thereby using the chilled water in the insulated water tank 6 to exchange heat with the room and realize indoor cooling. When the water temperature Ts in the insulated water tank 6 is greater than or equal to the fifth preset temperature T5, the controller 2 controls the second water pump 24 to be turned off, controls the fifth valve 20 and the sixth valve 21 to be turned off, controls the first water pump 23 and the outdoor unit 7 to be turned on, controls the first valve 16 and the second valve 17 to be turned on, so that the water flows in the loop formed by the outdoor unit 7 and the indoor unit 8, and continues to use the unit to cool the room.

[0052] The third preset temperature T3 can be set to 15°C, the fourth preset temperature T4 can be set to 30°C, and the fifth preset temperature T5 can be set to 15°C.

[0053] See also Figure 4 , the working process of heating mode is as follows:

[0054] S21: Control the water temperature TL in the outdoor unit 7 to increase.

[0055] Specifically, usually after 22:00 at night, when the indoor ambient temperature Tn is greater than the first preset temperature T1, the controller 2 controls the first valve 16 and the second valve 17 to be closed, and controls the third valve 18 and the fourth valve 19 to be turned on, so that water flows in the loop formed by the insulated water tank 6 and the outdoor unit 7, and the water temperature Ts in the insulated water tank 6 and the water temperature TL in the outdoor unit 7 increase until the water temperature TL in the outdoor unit 7 reaches the first preset high temperature, and then the third valve 18 and the fourth valve 19 can be controlled to be closed to stop heating.

[0056] The first preset high temperature may be set to 55°C.

[0057] S22: Control the indoor ambient temperature Tn to increase and achieve heating.

[0058] First, when the indoor ambient temperature Tn is greater than or equal to the second preset high temperature, the controller 2 controls the outdoor unit 7 to shut down. Secondly, when the indoor ambient temperature is lower than the third preset high temperature, the controller 2 controls the first valve 16 and the second valve 17 to be turned on, so that water flows in the loop formed by the outdoor unit 7 and the indoor unit 8, and continues to provide hot water for the indoor unit 8, thereby achieving indoor heating.

[0059] The second preset high temperature may be set to be 5° C. lower than the first preset temperature, and the third preset high temperature may be set to be 5° C. higher than the first preset temperature.

[0060] 3. The working process of energy storage mode is as follows:

[0061] When the water temperature Tr in the solar water heater 3 is less than or equal to the sixth preset temperature T6, the controller 2 controls the seventh valve 22 to be turned on, so that water flows in the loop formed by the insulated water tank 6 and the solar water heater 3, and the hot water in the insulated water tank 6 is injected into the solar water heater 3, until the water temperature Tr in the solar water heater 3 is greater than or equal to the seventh preset temperature T7, the controller 2 controls the seventh valve 22 to be turned off, and the energy storage ends.

[0062] The sixth preset temperature T6 can be set to 35°C, and the seventh preset temperature T7 can be set to 45°C.

[0063] The beneficial effects of the modular air-cooled hot and cold water system 1 provided in this embodiment are as follows:

[0064] 1. In the evening of summer, under the premise of meeting the needs of the user end, the unit does not need to shut down, but automatically switches the heat source side from the indoor unit 8 to the thermal insulation water tank 6, and exchanges heat with the water in the thermal insulation water tank 6 until the water temperature in the thermal insulation water tank 6 reaches the set temperature. After the water in the thermal insulation water tank 6 passes through the shell and tube of the outdoor unit 7 for heat exchange many times, the water temperature is reduced, and energy storage can be achieved. The same is true for hot water production in winter. In the summer, at the maximum cold load stage, the unit is shut down to dissipate heat, and the water in the thermal insulation water tank 6 is used for heat exchange to enhance the user experience;

[0065] 2. In winter, under the premise that the needs of users are met, the hot water produced by the unit is stored in the solar water heater tank 3 and supplied to users to ensure sufficient hot water supply;

[0066] 3. The modular air-cooled hot and cold water system 1 can save a lot of electricity bills. The insulated water tank 6 can supplement the cooling capacity in summer and the insulated water tank 6 can supplement the domestic hot water in winter, so that users can have a more comfortable experience. It has strong reliability, simple operation, less unit shutdown times, and high system stability.

[0067] The connection method of the device described in this embodiment is only a feasible example. In order to realize the method to be realized in this embodiment, the connection method of the device can also have other variations. As long as these variations are built around the basic structure of this embodiment, they should belong to the scope of protection claimed by the present invention. Among them, the basic structure of this embodiment is: the outdoor unit 7, the first pipeline 9, the indoor unit 8 and the second pipeline 10 are connected end to end in sequence to form a circulation loop, the insulated water tank 6 is connected to the first pipeline 9 and the second pipeline 10 respectively through pipelines, and the solar water tank 3 is connected to the insulated water tank 6.

[0068] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A modular air-cooled hot and cold water system, characterized in that: The modular air-cooled hot and cold water system comprises a solar water heater (3), an insulated water tank (6), an outdoor unit (7), an indoor unit (8), a first pipeline (9), a second pipeline (10), a third pipeline (11), a fourth pipeline (12), a first valve (16), a second valve (17), a third valve (18), a fourth valve (19), a fifth pipeline (13), a sixth pipeline (14), a fifth valve (20), a sixth valve (21), a first water pump (23), a second water pump (24), a seventh pipeline (15) and a seventh valve ( 22), the outdoor unit (7), the first pipeline (9), the indoor unit (8) and the second pipeline (10) are connected end to end in sequence to form a circulation loop, the first valve (16) is arranged on the first pipeline (9), the second valve (17) and the first water pump (23) are arranged on the second pipeline (10), the solar water heater (3) is connected to the heat preservation water tank (6), the heat preservation water tank (6) is connected to the first pipeline (9) through the third pipeline (11) and is located at the outdoor unit (7) ) and the first valve (16), the third valve (18) is arranged on the third pipeline (11), the heat preservation water tank (6) is connected to the second pipeline (10) through the fourth pipeline (12) and is located between the first water pump (23) and the second valve (17), the fourth valve (19) is arranged on the fourth pipeline (12), the heat preservation water tank (6) is connected to the first pipeline (9) through the fifth pipeline (13) and is located between the first valve (16) and the indoor unit (8) The fifth valve (20) is arranged on the fifth pipeline (13); the heat preservation water tank (6) is connected to the second pipeline (10) through the sixth pipeline (14) and is located between the second valve (17) and the indoor unit (8); the sixth valve (21) and the second water pump (24) are arranged on the sixth pipeline (14); the solar water heater tank (3) is connected to the heat preservation water tank (6) through the seventh pipeline (15); and the seventh valve (22) is arranged on the seventh pipeline (15); The modular air-cooled hot and cold water system further comprises a controller (2) and a first temperature sensing probe (25), a second temperature sensing probe (26), and a third temperature sensing probe (27) electrically connected to the controller (2), wherein the first temperature sensing probe (25) is mounted on the solar water tank (3) and is used to detect a water temperature Tr in the solar water tank (3), the second temperature sensing probe (26) is mounted on the thermal insulation water tank (6) and is used to detect a water temperature Ts in the thermal insulation water tank (6), the controller (2) is used to control a water flow direction in the system according to the water temperature Tr and the water temperature Ts, the third temperature sensing probe (27) is used to detect an indoor ambient temperature Tn, and the controller (2) is used to detect an indoor ambient temperature Tn; When the indoor ambient temperature Tn is less than or equal to the first preset temperature T1, the controller (2) is used to control the water flow in the circuit composed of the thermal insulation water tank (6) and the outdoor unit (7); When the indoor ambient temperature Tn is greater than or equal to a second preset temperature T2, the controller (2) is used to control the water flow to flow in the loop formed by the outdoor unit (7) and the indoor unit (8).

2. The modular air-cooled hot and cold water system according to claim 1, characterized in that: The solar water heater (3) comprises a domestic hot water tank (4) and a solar water heater (5); the solar water heater (5) is installed on the top of the domestic hot water tank (4) and is used to heat the water in the domestic hot water tank (4).

3. The modular air-cooled hot and cold water system according to claim 1, characterized in that: The modular air-cooled hot and cold water system further comprises a fourth temperature sensing probe (28) electrically connected to the controller (2), the fourth temperature sensing probe (28) being used to detect the water temperature TL in the outdoor unit (7); When the water temperature TL is greater than or equal to a third preset temperature T3 or the indoor environment temperature Tn is greater than or equal to a fourth preset temperature T4, the controller (2) is used to control the water flow to flow in the loop formed by the thermal insulation water tank (6) and the indoor unit (8); When the water temperature Ts is greater than or equal to a fifth preset temperature T5, the controller (2) is used to control the water flow to flow in the loop formed by the outdoor unit (7) and the indoor unit (8).

4. The modular air-cooled hot and cold water system according to claim 1, characterized in that: When the water temperature Tr is less than or equal to a sixth preset temperature T6, the controller (2) is used to control the water flow to flow in the loop formed by the thermal insulation water tank (6) and the solar water heater tank (3).

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