Air conditioning system and control method thereof

Abstract

The present disclosure provides an air conditioning system and a control method thereof. The air conditioning system includes: a cold source device for providing chilled water; a data center air conditioning subsystem for dissipating heat in the data center, which includes a water-cooled heat exchanger; and a room air conditioning subsystem, which includes a water-cooled condenser; wherein the water-cooled heat exchanger and the water-cooled condenser are arranged in series on a water supply circulation water path of the cold source device, and the water-cooled heat exchanger is located upstream of the water-cooled condenser. When the data center air conditioning subsystem is in air cooling mode and the room air conditioning subsystem is in cooling mode, the cold source device sequentially supplies water to the water-cooled heat exchanger and the water-cooled condenser, realizing step-by-step cooling, so that the energy of the refrigeration equipment is fully utilized, thereby improving the system energy efficiency.

Description

Technical Field

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

[0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] In the early stages of operation, the racking rate of data centers is generally low, resulting in the system operating at low load for a long time. The system energy efficiency is low, the energy of the cooling system is not fully utilized, and the heat of the high-temperature return air in most data centers is not utilized. Summary of the invention

[0004] The inventors have discovered through research that the related technology has the problem of low system energy efficiency.

[0005] In view of this, an embodiment of the present disclosure provides an air conditioning system and a control method thereof, which can improve the energy efficiency of the system.

[0006] Some embodiments of the present disclosure provide an air conditioning system, comprising:

[0007] Cold source equipment, used to provide chilled water;

[0008] A data center air conditioning subsystem, which is used to dissipate heat in the data center and includes a water-cooled heat exchanger; and

[0009] a room air conditioning subsystem including a water-cooled condenser;

[0010] The water-cooled heat exchanger and the water-cooled condenser are arranged in series on a water supply circulation waterway of the cold source equipment, and the water-cooled heat exchanger is located upstream of the water-cooled condenser.

[0011] In some embodiments, the data center air conditioning subsystem also includes a water cooling mechanism for water cooling the data center. The water-cooled heat exchanger is configured to air cool the data center. The water-cooled heat exchanger and the water cooling mechanism are arranged in series on the water supply circulation waterway of the cold source equipment, and the water-cooled heat exchanger is located upstream of the water cooling mechanism.

[0012] In some embodiments, in the water supply circulation water circuit of the cold source device, a water-cooled condenser can be switchably arranged upstream of the water cooling mechanism.

[0013] In some embodiments, the data center air conditioning subsystem includes a refrigeration and dehumidification section, and the water-cooled heat exchanger is disposed in the refrigeration and dehumidification section.

[0014] In some embodiments, the data center air conditioning subsystem includes a return air duct, and the room air conditioning subsystem also includes an air-cooled evaporator, and the air-cooled evaporator is disposed in the return air duct.

[0015] In some embodiments, the room air conditioning subsystem also includes a compressor, a switching valve, an expansion valve and a heat exchanger. The switching valve is used to switch the refrigerant flow path of the compressor so that the room air conditioning subsystem switches between cooling mode and heating mode. In cooling mode, the heat exchanger acts as a condenser; in heating mode, the heat exchanger acts as an evaporator.

[0016] In some embodiments, it also includes a plurality of on-off valves arranged on the water supply circulation water circuit of the cold source device, which are used to control the cold source device to supply water to the water-cooled heat exchanger alone or to supply water to the water-cooled heat exchanger and the water-cooled condenser in sequence.

[0017] In some embodiments, it also includes a plurality of on-off valves arranged on the water supply circulation water circuit of the cold source device, which are used to control the cold source device to supply water to the water-cooled heat exchanger alone or to supply water to the water-cooled heat exchanger and the water cooling mechanism in sequence.

[0018] In some embodiments, it also includes multiple on-off valves arranged on the water supply circulation water line of the cold source equipment, which are used to control the cold source equipment to supply water to the water-cooled heat exchanger alone, to supply water to the water-cooled heat exchanger and the water-cooled condenser in sequence, or to supply water to the water-cooled heat exchanger, the water-cooled condenser and the water cooling mechanism in sequence.

[0019] Some embodiments of the present disclosure provide a control method, which is applied to control the aforementioned air conditioning system, including:

[0020] The cold source equipment is controlled to supply water to the water-cooled heat exchanger and the water-cooled condenser in sequence, so that the data center air conditioning subsystem is in an air cooling mode, and the room air conditioning subsystems are all in a cooling mode.

[0021] Some embodiments of the present disclosure provide a control method, which is applied to control the aforementioned air conditioning system, including:

[0022] The cold source equipment is controlled to supply water to the water-cooled heat exchanger, the water-cooled condenser and the water cooling mechanism in sequence, so that the data center air conditioning subsystem is in an air-cooled and water-cooled integrated mode, and the room air conditioning subsystems are all in a cooling mode.

[0023] Therefore, based on the above technical scheme, the air-conditioning system disclosed in the present invention consists of a data center air-conditioning subsystem and a room air-conditioning subsystem. The water-cooled heat exchanger and the water-cooled condenser are arranged in series on the water supply circulation water line of the cold source equipment, and the water-cooled heat exchanger is located upstream of the water-cooled condenser. When the data center air-conditioning subsystem is in air-cooling mode and the room air-conditioning subsystem is in cooling mode, the cold source equipment supplies water to the water-cooled heat exchanger and the water-cooled condenser in turn, realizing stepped cooling, so that the energy of the refrigeration equipment is fully utilized, thereby improving the system energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0026] Figure 1 is a schematic diagram of the structural principle of some embodiments of the air conditioning system according to the present disclosure;

[0027] Figure 2 is a schematic diagram of a data center structure of a data center air conditioning subsystem according to some embodiments of the air conditioning system of the present disclosure;

[0028] Figure 3 is a schematic diagram of a room structure of a room air conditioning subsystem according to some embodiments of the refrigeration system of the present disclosure;

[0029] Figure 4 It is a schematic diagram of the data center structure of the data center air conditioning subsystem in some other embodiments of the air conditioning system disclosed herein. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0031] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0033] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] like Figure 1~Figure 3 As shown, some embodiments of the present disclosure provide an air-conditioning system, including: a cold source device 1, a data center air-conditioning subsystem 2 and a room air-conditioning subsystem 3, wherein the cold source device 1 is used to provide chilled water; the data center air-conditioning subsystem 2 is used to dissipate heat for the data center, and includes a water-cooled heat exchanger 4; the room air-conditioning subsystem 3 includes a water-cooled condenser 7; the water-cooled heat exchanger 4 and the water-cooled condenser 7 are arranged in series on a water supply circulation waterway of the cold source device 1, and the water-cooled heat exchanger 4 is located upstream of the water-cooled condenser 7.

[0036] like Figure 1 As shown, in this exemplary embodiment, as Figure 1 As shown by the dotted line in the figure, the water-cooled heat exchanger 4 and the water-cooled condenser 7 are arranged in series on the water supply circulation waterway of the cold source device 1, and the water-cooled heat exchanger 4 is located upstream of the water-cooled condenser 7. When the data center air-conditioning subsystem 2 is in air-cooling mode and the room air-conditioning subsystem 3 is in cooling mode, the cold source device 1 supplies water to the water-cooled heat exchanger 4 and the water-cooled condenser 7 in turn. Since the cooling requirement of the water-cooled condenser 7 is not as high as that of the water-cooled heat exchanger 4, the temperature of the chilled water rises after passing through the water-cooled heat exchanger 4, which just meets the cooling requirement of the water-cooled condenser 7, realizing stepped cooling, so that the cold source of the cold source device 1 is fully utilized, thereby improving the system energy efficiency.

[0037] like Figure 1 and Figure 2 As shown, the data center air conditioning subsystem 2 is used to produce a low-temperature medium (cold air and / or cooling water) to remove the heat of the data center through heat exchange. Figure 2 As shown, in some embodiments, the data center air conditioning subsystem 2 includes a mixed air section 201, a refrigeration and dehumidification section 202, a humidification section 203, and an elevated floor 204; hot channels 205 and 207; a cold channel 206, a data processing device 208, and a return air channel 209; and a water-cooled heat exchanger 4 is disposed in the refrigeration and dehumidification section 202.

[0038] In some embodiments, Figure 1 and Figure 3 As shown, the room air conditioning subsystem 3 includes an air-cooled evaporator 5, a compressor 9, a switching valve 8, an expansion valve 10, and a heat exchanger 6. The switching valve 8 is used to switch the refrigerant flow path of the compressor 9 so that the room air conditioning subsystem 3 switches between the cooling mode and the heating mode. In the cooling mode, the heat exchanger 6 acts as a condenser; in the heating mode, the heat exchanger 6 acts as an evaporator.

[0039] like Figure 1 As shown, on-off valves 11 to 20 are provided on the refrigerant flow path and the cooling water path. In some embodiments, the air conditioning system further includes a plurality of on-off valves provided on the water supply circulation water path of the cold source device 1, which are used to control the cold source device 1 to supply water to the water-cooled heat exchanger 4 alone or to supply water to the water-cooled heat exchanger 4 and the water-cooled condenser 7 in sequence.

[0040] In some embodiments, the air conditioning system also includes multiple on-off valves arranged on the water supply circulation water line of the cold source device 1, which are used to control the cold source device 1 to supply water to the water-cooled heat exchanger 4 alone or to supply water to the water-cooled heat exchanger 4 and the water cooling mechanism in sequence.

[0041] In some embodiments, the air-conditioning system also includes multiple on-off valves arranged on the water supply circulation water line of the cold source device 1, which are used to control the cold source device 1 to supply water to the water-cooled heat exchanger 4 alone, to supply water to the water-cooled heat exchanger 4 and the water-cooled condenser 7 in sequence, or to supply water to the water-cooled heat exchanger 4, the water-cooled condenser 7 and the water cooling mechanism in sequence.

[0042] like Figure 3 As shown, the room in the room air conditioning subsystem 3 includes a fresh air inlet 301, an air mixing section 302, a cooling, dehumidification and heating section 303, a humidification section 304, a return air outlet 305, a return air channel 306, an exhaust outlet 307, and air valves 308 and 309.

[0043] In some embodiments, the data center air conditioning subsystem 2 also includes a water cooling mechanism for water cooling the data center, and the water-cooled heat exchanger 4 is configured to air cool the data center. The water-cooled heat exchanger 4 and the water cooling mechanism are arranged in series on the water supply circulation waterway of the cold source device 1, and the water-cooled heat exchanger 4 is located upstream of the water cooling mechanism. The air-cooled plus water-cooled mode is used to integrate the two modes of air cooling and water cooling to meet the cooling needs in different scenarios. The cold source device 1 supplies water to the water-cooled heat exchanger 4 and the water cooling mechanism in turn. Since the cooling requirement of the water cooling mechanism is not as high as the cooling requirement of the water cooling heat exchanger 4, the temperature of the chilled water rises after passing through the water-cooled heat exchanger 4, which just meets the cooling requirement of the water cooling mechanism, and realizes stepped cooling, so that the cold source of the cold source device 1 is fully utilized, thereby improving the energy efficiency of the system.

[0044] In some embodiments, in the water supply circulation water circuit of the cold source device 1, the water-cooled condenser 7 can be switchably arranged upstream of the water cooling mechanism, so that the cold source device 1 can be controlled to supply water to the water-cooled heat exchanger 4, the water-cooled condenser 7 and the water cooling mechanism in sequence, realizing three-level stepped cooling, maximizing the use of the cold source of the cold source device 1, and further improving the system energy efficiency.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the air-cooled evaporator 5 is arranged in the return air duct 209, and the heat of the high-temperature return air of the data center is absorbed and utilized by the air-cooled evaporator 5, thereby providing heat energy for the room, improving energy utilization, enhancing system energy efficiency, saving energy and protecting the environment, and having high feasibility.

[0046] Below Figure 1~Figure 3 The working mode of the air conditioning system of the present disclosure is described by taking the embodiment shown as an example as follows:

[0047] The data center requires year-round cooling according to its operating characteristics, and the data center air conditioning subsystem 2 has an air cooling mode and an air cooling and water cooling integrated mode.

[0048] In the air-cooling mode, the on-off valve 11 is opened, the on-off valve 13 is opened or closed according to the mode selection of the room air-conditioning subsystem 3 (closed in the cooling mode, opened in the heating mode), and the on-off valve 14 is opened or closed according to the mode selection of the room air-conditioning subsystem 3 (opened in the cooling mode, closed in the heating mode). When the room air-conditioning subsystem 3 is in the cooling mode, the chilled water generated by the cold source device 1 is returned to the cold source device 1 after heat exchange through the water-cooled heat exchanger 4 and the water-cooled condenser 7, and the cycle is repeated; when the room air-conditioning subsystem 3 is in the heating mode The chilled water generated by the cold source equipment 1 passes through the water-cooled heat exchanger 4 and then directly returns to the cold source equipment 1, and the cycle continues. The high-temperature return air in the data center fully exchanges heat with the water-cooled heat exchanger 4 in the refrigeration and dehumidification section 202, cools and dehumidifies, passes through the humidification section 203, and is processed to the air supply state point. It is then sent to the cold channel 206 through the raised floor 204. The cold air exchanges heat with the data processing equipment, passes through the hot channels 205 and 207, enters the return air channel 209, and then enters the mixed air section 201, and then enters the refrigeration and dehumidification section 202 to form a cycle.

[0049] The air cooling mode is suitable for situations where the equipment rack rate in the data center is not high, the load rate of the entire data center is not high, or the equipment power density is not high. This situation usually occurs in the early stages of data center construction or in some small and medium-sized data.

[0050] In the air-cooling and water-cooling integrated mode, the on-off valve 11, the on-off valve 12, and the on-off valves 17-20 are all opened, the on-off valve 13 is opened or closed according to the mode selection of the room air-conditioning subsystem 3 (closed in the cooling mode, opened in the heating mode), and the on-off valve 14 is opened or closed according to the mode selection of the room air-conditioning subsystem 3 (opened in the cooling mode, closed in the heating mode). When the room air-conditioning subsystem 3 is in the cooling mode, the chilled water generated by the cold source device 1 passes through the water-cooled heat exchanger 4 and the water-cooled condenser 7, and is divided into two paths. One path directly returns to the cold source device 1, and the other path passes through the on-off valve 12 to flow to the data processing device, directly takes away the heat of the data processing device in the backplane of the data processing device, and then returns to the cold source device 1 through the on-off valves 17-20; when the room air-conditioning subsystem 3 is in the heating mode, the chilled water generated by the cold source device 1 passes through the water-cooled heat exchanger 4 and is divided into two paths. One path directly returns to the cold source device 1, and the other path passes through the on-off valve 12 to flow to the data processing device. The heat of the data processing equipment is directly taken away in the backplane of the data processing equipment, and then returned to the cold source equipment 1 through the on-off valves 17-20. Among them, the flow and processing process of the indoor air in the data are consistent with the air cooling mode.

[0051] The integrated air-cooling and water-cooling mode is suitable for data centers with high load rates, high equipment power density, or temperature-sensitive equipment that requires rapid heat dissipation. This mode provides rapid cooling and high efficiency.

[0052] The room air conditioning subsystem 3 is mainly used in offices, conference rooms and other scenes. According to seasonal changes, there are mainly two forms of cooling and heating, which will be explained one by one below.

[0053] When the room air conditioning subsystem 3 is in cooling mode, the on-off valve 15 is closed, the on-off valve 11, the on-off valve 14 and the on-off valve 16 are opened, and the switching valve 8 (four-way reversing valve) is connected to the AP and BT gears. At this time, the refrigerant in the pipeline passes through the compressor 9, passes through the on-off valve 16, flows to the water-cooled condenser 7, and then flows to the heat exchanger 6 (as an evaporator) through the throttling expansion valve 10, and finally returns to the compressor 9. In this process, the heat generated by the condenser is taken away by the chilled water of the cold source device 1 through heat exchange. The fresh air enters the mixing section 302 through the fresh air inlet 301, mixes with the indoor return air, and is cooled and dehumidified by the heat exchanger 6 in the cooling, dehumidifying and heating section 303, and then passes through the humidification section 304 and is sent to the room. The indoor return air enters the return air channel 306 through the return air port 305. Finally, a part of the return air is discharged to the outside through the air valve 308 and the exhaust port 307, and the rest is sent to the mixing section 302 to form a cycle.

[0054] When the room air conditioning subsystem 3 is in heating mode, the on-off valve 15 is opened, the on-off valve 14 and the on-off valve 16 are closed, and the switching valve 8 (four-way reversing valve) is connected to the AB and PT gears. At this time, the refrigerant in the pipeline passes through the compressor 9, flows to the heat exchanger 6 (as a condenser), and then flows to the air-cooled evaporator 5 through the throttling expansion valve 10, and finally returns to the compressor 9 through the on-off valve 15. In this process, the evaporator absorbs heat by exchanging energy with the high-temperature return air of the return air channel 209, and then transfers the heat to the heat exchanger 6 through the refrigerant, and finally transfers the heat to the indoor air through the heat exchanger 6. The circulation process of the indoor air is consistent with the cooling mode, which will not be repeated here.

[0055] Combining the operation modes of the above data center air conditioning subsystem 2 and room air conditioning subsystem 3, the following system operation modes can be obtained:

[0056] (1) Data center air cooling mode + room air conditioning refrigeration;

[0057] This mode is enabled when the outdoor temperature is high, the power density of data center equipment is low, and the rack rate is not high;

[0058] (2) Data center air cooling mode + room air conditioning heating;

[0059] This mode is enabled when the outdoor temperature is low, the power density of data center equipment is low, and the rack rate is not high;

[0060] (3) Data center air-cooling and water-cooling integrated mode + room air conditioning refrigeration;

[0061] This mode is enabled when the outdoor temperature is high, the power density of the data center equipment is high, the rack rate is high, and the data processing equipment needs to be cooled quickly;

[0062] (4) Data center air-cooling and water-cooling integrated mode + room air conditioning heating;

[0063] This mode is enabled when the outdoor temperature is low, the power density of data center equipment is high, the rack rate is high, and the data processing equipment needs to be cooled quickly.

[0064] like Figure 4 As shown, in some embodiments, the data center air conditioning subsystem 2 can start the natural cooling mode, and the exhaust port 210 and air valves 211 and 212 can be added to the system structure. The fresh air enters the mixed air section, is filtered and settled, and is directly sent to the equipment room of the data center. After heat exchange, it enters the return air duct and is discharged from the exhaust port 210. The use of natural cooling in this mode can greatly improve the energy efficiency of the system, but since the data center has strict requirements on air quality, this mode needs to add more efficient filters. If the data center has requirements on the cooling time of the equipment, it is also necessary to add a plate heat exchanger, and the investment cost also increases accordingly.

[0065] The room air conditioning subsystem 3 can also start the natural cooling mode, that is, open the on-off valve 13, close the on-off valve 14, close the room air conditioning subsystem 3, and the fresh air enters the mixed air section, is filtered, and is directly sent to the room to bear all the heat load and fresh air load of the room, and then is discharged from the exhaust port 307. This mode is suitable for transitional seasons when the outdoor temperature is low.

[0066] Based on the above principles, some embodiments of the present disclosure provide a control method accordingly, which is applied to control the aforementioned air conditioning system, including:

[0067] The cold source device 1 is controlled to supply water to the water-cooled heat exchanger 4 and the water-cooled condenser 7 in sequence, so that the data center air conditioning subsystem 2 is in the air cooling mode, and the room air conditioning subsystems 3 are all in the cooling mode.

[0068] Some embodiments of the present disclosure provide a control method, which is applied to control the aforementioned air conditioning system, including:

[0069] The cold source device 1 is controlled to supply water to the water-cooled heat exchanger 4, the water-cooled condenser 7 and the water cooling mechanism in sequence, so that the data center air conditioning subsystem 2 is in an air-cooled and water-cooled integrated mode, and the room air conditioning subsystems 3 are all in a cooling mode.

[0070] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0071] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An air conditioning system, characterized in that: include: A cold source device (1) for providing chilled water; A data center air conditioning subsystem (2) for dissipating heat in a data center, comprising a water-cooled heat exchanger (4) and a water cooling mechanism, the data center air conditioning subsystem (2) comprising a return air duct (209), the water cooling mechanism for dissipating water in the data center, the water-cooled heat exchanger (4) being configured to dissipate air in the data center, the water-cooled heat exchanger (4) and the water cooling mechanism being arranged in series on a water supply circulation water path of the cold source device (1), and the water-cooled heat exchanger (4) being located upstream of the water cooling mechanism; and A room air conditioning subsystem (3), comprising a water-cooled condenser (7), the room air conditioning subsystem (3) further comprising an air-cooled evaporator (5), the air-cooled evaporator (5) being arranged in the return air duct (209), the room air conditioning subsystem (3) further comprising a compressor (9), a switching valve (8), an expansion valve (10) and a heat exchanger (6), the switching valve (8) being used to switch the refrigerant flow path of the compressor (9) so that the room air conditioning subsystem (3) switches between a cooling mode and a heating mode, and in the cooling mode, the heat exchanger (6) serves as an evaporator; In the heating mode, the heat exchanger (6) acts as a condenser; The water-cooled heat exchanger (4) and the water-cooled condenser (7) are arranged in series on the water supply circulation waterway of the cold source device (1), and the water-cooled heat exchanger (4) is located upstream of the water-cooled condenser (7). In the water supply circulation waterway of the cold source device (1), the water-cooled condenser (7) is arranged upstream of the water cooling mechanism.

2. The air conditioning system according to claim 1, characterized in that: The data center air conditioning subsystem (2) comprises a refrigeration and dehumidification section (202), and the water-cooled heat exchanger (4) is arranged in the refrigeration and dehumidification section (202).

3. The air conditioning system according to claim 1, characterized in that: It also includes a plurality of on-off valves arranged on the water supply circulation water path of the cold source device (1), which are used to control the cold source device (1) to supply water to the water-cooled heat exchanger (4) alone, or to supply water to the water-cooled heat exchanger (4) and the water cooling mechanism in sequence, or to supply water to the water-cooled heat exchanger (4) and the water-cooled condenser (7) in sequence, or to supply water to the water-cooled heat exchanger (4), the water-cooled condenser (7) and the water cooling mechanism in sequence.

4. A control method, applied to control the air conditioning system according to any one of claims 1 to 3, comprising: The cold source device (1) is controlled to supply water to the water-cooled heat exchanger (4) and the water-cooled condenser (7) in sequence, so that the data center air conditioning subsystem (2) is in an air cooling mode, and the room air conditioning subsystems (3) are all in a cooling mode.

5. A control method, applied to control the air conditioning system according to claim 1, comprising: The cold source device (1) is controlled to supply water to the water-cooled heat exchanger (4), the water-cooled condenser (7) and the water cooling mechanism in sequence, so that the data center air conditioning subsystem (2) is in an air-cooled and water-cooled integrated mode, and the room air conditioning subsystems (3) are all in a cooling mode.

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