WO2023240913A1

WO2023240913A1 - Air conditioning unit, data center machine room, and control method for air conditioning unit

Info

Publication number: WO2023240913A1
Application number: PCT/CN2022/131138
Authority: WO
Inventors: 张炳华; 李明江; 王正华
Original assignee: 河北秦淮数据有限公司
Priority date: 2022-06-14
Filing date: 2022-11-10
Publication date: 2023-12-21

Abstract

The present application provides an air conditioning unit, a data center machine room, and a control method for the air conditioning unit. The air conditioning unit comprises a heat exchange module (11), a condensation module (12), a pressurizing module (13), and a throttling module (14). A first output end of the heat exchange module (11) is connected to an input end of the condensation module (12), an output end of the condensation module (12) is connected to an input end of the pressurizing module (13), an output end of the pressurizing module (13) is connected to an input end of the throttling module (14), an output end of the throttling module (14) is connected to an input end of the heat exchange module (11), and a second output end of the heat exchange module (11) leads into an air supply channel. In a temperature regulation process of the present application, mechanical refrigeration, a cooling water source, etc. are not used, but a free cooling source is used. By means of making full use of the free cooling source to regulate the temperature of a machine room, a compressor does not need to be started up, and the energy consumption of an air conditioner of the machine room is reduced, so that the purpose of reducing a PUE value of the machine room is achieved. In addition, cooling water does not need to be used, so that the purpose of conserving water resources is achieved.

Description

Control methods of air conditioning units, data center computer rooms and air conditioning units

This disclosure is required to be submitted to the Chinese Patent Office on June 14, 2022, with the application number 2022106705744, and the priority of the Chinese patent application titled "Air conditioning unit and control method"; and, it is required to be submitted to the Chinese Patent Office on June 14, 2022 Patent Office, with application number 2022214887400, claims priority to a Chinese patent application titled "Air Conditioning Unit", the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the technical field of air conditioning, and more specifically, to an air conditioning unit, a data center computer room, and a control method of the air conditioning unit.

Background technique

In the information age, people's lives are filled with a large amount of information data. These massive amounts of information data often rely on numerous data centers to store and process them. As the scale and integration of data centers develop, the density and power of servers in the data center are also increasing.

In order to ensure the normal operation of servers and other electronic equipment in the computer room, the temperature of the computer room needs to be maintained within a certain range. The traditional approach is to install air conditioning in the computer room and use mechanical refrigeration to adjust the temperature in the computer room.

Then, the electrical energy consumed by the mechanical refrigeration method is too high, accounting for more than 35% of the energy consumption of the entire computer room, causing the power usage efficiency (Power Usage Effectiveness, PUE) of the computer room to fail to meet the requirements.

Contents of the invention

The present disclosure provides an air conditioning unit, a data center computer room, and a control method for the air conditioning unit. By making full use of natural cold sources to regulate the temperature of the computer room, the energy consumption of the computer room air conditioning is reduced, thereby achieving the purpose of reducing the PUE value of the computer room.

In a first aspect, an embodiment of the present disclosure provides an air conditioning unit, including: a heat exchange module, a condensation module, a pressurizing module and a throttling module. The first output end of the heat exchange module is connected to the input end of the condensation module. , the output end of the condensation module is connected to the input end of the pressurizing module, the output end of the pressurizing module is connected to the input end of the throttling module, the output end of the throttling module is connected to the heat The input end of the exchange module is connected, and the second output end of the heat exchange module leads to the air supply channel, where:

The heat exchange module is used to perform heat exchange on indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant when the outdoor temperature is lower than the preset temperature, and outputs the gas refrigerant through the first output end. The second output end sends the cold air into the electronic device through the air supply channel;

The condensation module is used to condense the gas refrigerant into liquid refrigerant;

The pressurizing module is used to pressurize the liquid refrigerant to obtain pressurized refrigerant;

The throttling module is used to throttle the pressurized refrigerant to obtain the throttling refrigerant, and input the throttling refrigerant to the heat exchange module.

In a second aspect, embodiments of the present disclosure provide a data center computer room, including: a computer room, in which an air conditioning unit as described in the above first aspect or various possible implementations of the first aspect is installed.

In a third aspect, embodiments of the present disclosure provide a control method for an air conditioning unit, which is applied to a heat exchange module, a condensation module, a pressurization module and a throttling module. The first output end of the heat exchange module is connected to the condensation module. The input end of the condensation module is connected to the input end of the pressurizing module, the output end of the pressurizing module is connected to the input end of the throttling module, and the output end of the throttling module Connected to the input end of the heat exchange module, the second output end of the heat exchange module leads to the air supply channel, and the method includes:

When the outdoor temperature is lower than the preset temperature, the heat exchange module is used to perform heat exchange on indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant;

using the condensation module to condense the gas refrigerant into a liquid refrigerant liquid;

Use the pressurizing module to pressurize the liquid refrigerant to obtain pressurized refrigerant;

The pressurized refrigerant is throttled using the throttling module to obtain the throttled refrigerant, and the throttled refrigerant is input to the heat exchange module.

In the air conditioning unit and control method provided by the embodiments of the present disclosure, the air conditioning unit includes a heat exchange module, a condensation module, a pressurization module and a throttling module. The first output end of the heat exchange module is connected to the input end of the condensation module. The output of the condensation module The end of the pressure module is connected to the input end of the pressure module, the output end of the pressure module is connected to the input end of the throttling module, the output end of the throttling module is connected to the input end of the heat exchange module, and the second output end of the heat exchange module is connected to Air supply channel. During the temperature adjustment process of the computer room, when the outdoor temperature is lower than the preset temperature, the heat exchange module is used to heat exchange the indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant, and send the cold air into the computer room through the air supply channel. In the electronic equipment inside, the gas refrigerant enters the condensation module and is condensed into liquid refrigerant. The liquid refrigerant enters the pressurization module and is pressurized before entering the throttling module. The throttling module regulates the pressurized refrigerant to obtain throttling refrigerant. The throttling refrigerant enters the heat exchange module to form a complete refrigeration cycle. With this solution, mechanical refrigeration and cooling water sources are not used in the temperature adjustment process, but natural cold sources are used. By making full use of natural cold sources to adjust the temperature of the computer room, there is no need to start the compressor, which reduces the energy consumption of the computer room air conditioning. In order to achieve the purpose of reducing the PUE value of the computer room. At the same time, there is no need to use cooling water, thereby achieving the purpose of saving water resources.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an air conditioning unit provided by an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of a condensation module in an air conditioning assembly provided by an embodiment of the present disclosure;

Figure 3 is a schematic structural diagram of a heat exchange module in an air conditioning assembly provided by an embodiment of the present disclosure;

Figure 4 is a schematic structural diagram of the evaporator in Figure 3;

Figure 5A is a schematic diagram of the process of the air conditioning unit operating in the first mode according to the embodiment of the present disclosure;

Figure 5B is a schematic diagram of the process of the air conditioning unit operating in the second mode according to the embodiment of the present disclosure;

Figure 5C is a schematic diagram of the process of the air conditioning unit operating in the third mode according to the embodiment of the present disclosure;

Figure 5D is a schematic diagram of the process of the air conditioning unit operating in the fourth mode according to the embodiment of the present disclosure;

Figure 6 is a schematic structural diagram of another air conditioning unit provided by an embodiment of the present disclosure;

Figure 7 is a flow chart of a control method of an air conditioning unit provided by an embodiment of the present disclosure.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings.

With the development of data center scale and integration, the power and heat density of electronic equipment such as servers in the computer room are increasing day by day, resulting in two problems. On the one hand, the power consumed in the computer room has increased significantly, causing the PUE value of the computer room to remain high. On the other hand, the heat generated by electronic equipment in the computer room is increasing, and heat dissipation consumes a lot of energy. When the computer room temperature is unreasonably adjusted, servers and other equipment may become overheated and shut down in severe cases.

In order to ensure that the temperature of the computer room is maintained within a reasonable range, traditional computer rooms use mechanical refrigeration. Common mechanical refrigeration and air-conditioning units on the market are, for example, indirect evaporative cooling air-conditioning units. However, mechanical refrigeration consumes up to 35% or even more than 35% of the total energy consumption of the computer room, and the cooling effect is poor. This brings certain difficulties to the daily management of the computer room. In addition, the use of mechanical refrigeration will consume a large amount of cooling water in the process of temperature adjustment in the computer room, which is a serious waste of water resources.

Based on this, embodiments of the present disclosure provide an air conditioning unit and a control method that fully utilize natural cooling sources to adjust the temperature of the computer room and reduce the energy consumption of the computer room air conditioner, thereby achieving the purpose of reducing the PUE value of the computer room. At the same time, there is no need to use cooling water, thereby achieving the purpose of saving water resources.

Figure 1 is a schematic structural diagram of an air conditioning unit provided by an embodiment of the present disclosure. Please refer to Figure 1. The air conditioning unit 100 provided by the embodiment of the present disclosure includes: a heat exchange module 11, a condensation module 12, a pressurization module 13 and a throttling module 14. The first output end of the heat exchange module 11 is connected to the condensation module 14. The input end of the module 12 is connected, the output end of the condensation module 12 is connected to the input end of the pressurizing module 13, the output end of the pressurizing module 13 is connected to the input end of the throttling module 14, and the throttling module 14 The output end is connected to the input end of the heat exchange module 11, and the second output end of the heat exchange module 11 leads to the air supply channel, where: the heat exchange module 11 is used for indoor hot air and throttling refrigeration. The liquid is heat exchanged to obtain cold air and gas refrigerant, the gas refrigerant is output through the first output end, and the cold air is sent into the data center computer room through the air supply channel through the second output end, thereby cooling the data Electronic equipment in the central computer room; the condensation module 12 is used to condense the gas refrigerant into liquid refrigerant; the pressurization module 13 is used to pressurize the liquid refrigerant to obtain pressurized refrigerant, and then send it into The throttling module 14 is used to throttle the pressurized liquid refrigerant to obtain the throttling refrigerant, and input the throttling refrigerant to the heat exchange module 11 .

The air conditioning unit provided by the embodiment of the present disclosure is suitable for computer rooms in areas where the outdoor temperature is lower than the required indoor temperature of the computer room. It utilizes outdoor natural cold sources to circulate refrigerant through a refrigerant circulation pump to exchange indoor heat to the outdoor atmospheric environment. The required temperature in the computer room is also called a preset temperature, for example, 23°C, etc., which is not limited by the embodiment of the present disclosure.

During the temperature adjustment process, the heat exchange module 11 guides indoor hot air to the heat exchange module 11 , and the throttling refrigerant generated by the throttling module 14 also enters the heat exchange module 11 . The throttling refrigerant is usually liquid. The indoor hot air and the throttling refrigerant undergo heat exchange in the heat exchange module 11. The throttling refrigerant absorbs the heat of the indoor hot air and turns it into gas refrigerant, and the indoor hot air turns into cold air. Afterwards, the cold air is output from the second output end of the heat exchange module 11 and cools the electronic equipment in the computer room through the air supply channel to cool down the electronic equipment. The caliber of the second output port is, for example, as large as the entrance of the air supply channel, ensuring that a large amount of cold air is sent into the computer room in time.

The gas refrigerant enters the condensation module 12 through the first output end of the heat exchange module 11. The condensation module 12 is, for example, a condenser array. The condensation module 12 uses the outdoor natural environmental cold source to cool the gas refrigerant to obtain liquid refrigerant. The heat of the gas refrigerant is discharged into the outdoor atmosphere, and the liquid refrigerant is input to the pressurizing module 13 through the output end of the condensing module 12 .

The pressurizing module 13 is used to adjust the pressure of liquid refrigerant to obtain pressurized refrigerant.

The throttling module 14 mainly plays the role of throttling and depressurizing, reducing the pressure of the pressurized refrigerant from the pressurized pressure to the evaporation pressure to obtain throttling refrigerant. The throttling refrigerant facilitates evaporation and absorption in the heat exchange module 11 hot.

According to the above, it can be seen that the heat exchange module 11, the condensation module 12, the pressurization module 13 and the throttling module 14 form a complete refrigeration cycle, thereby continuously regulating the temperature of the computer room.

The air conditioning unit provided by the embodiment of the present disclosure includes a heat exchange module, a condensation module, a pressurization module and a throttling module. The first output end of the heat exchange module is connected to the input end of the condensation module, and the output end of the condensation module is connected to the pressurization module. The input end is connected, the output end of the pressure module is connected to the input end of the throttling module, the output end of the throttling module is connected to the input end of the heat exchange module, and the second output end of the heat exchange module leads to the air supply channel. During the temperature adjustment process of the computer room, when the outdoor temperature is lower than the preset temperature, the heat exchange module is used to heat exchange the indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant, and send the cold air into the computer room through the air supply channel. In the electronic equipment inside, the gas refrigerant enters the condensation module and is condensed into liquid refrigerant. The liquid refrigerant enters the pressurization module and is pressurized before entering the throttling module. The throttling module regulates the pressurized refrigerant to obtain throttling refrigerant. The throttling refrigerant enters the heat exchange module to form a complete refrigeration cycle. With this solution, mechanical refrigeration and cooling water sources are not used in the temperature adjustment process, but natural cold sources are used. By making full use of natural cold sources to adjust the temperature of the computer room, there is no need to start the compressor, which reduces the energy consumption of the computer room air conditioning. In order to achieve the purpose of reducing the PUE value of the computer room. At the same time, there is no need to use cooling water, thereby achieving the purpose of saving water resources.

Optionally, please refer to Figure 1 again. The air conditioning unit provided by the embodiment of the present disclosure also includes a humidifier 15, which is disposed in the air supply channel and used to perform temperature and humidity treatment on the cold air to obtain a temperature and humidity that meets the target temperature. Cool breeze at target humidity.

For example, the humidifier 15 may be a wet film humidifier or the like, which is not limited by the embodiment of the present disclosure. By setting the humidifier 15, before the cold air enters the computer room, the humidifier first performs temperature and humidity treatment on the cold air, so that the cold air reaches the target temperature and target humidity required by the computer room, and then the cold air that meets the target temperature and target humidity is sent into the computer room. .

When a wet film humidifier is used, the water in the water tank is transported to the sprinkler on the top of the humidifier, and the water is evenly poured onto the top of the wet film. The sprinkler ensures that the water is evenly distributed to the wet film material, and the water is sprayed under the action of gravity. It penetrates downward along the wet film material, wets all layers inside the wet film, and is absorbed by the wet film material at the same time, forming a uniform water film. When the dry cold air passes through the wet film material, the dry air and the moist wet film surface have a large area of contact, and the moisture fully absorbs the heat of the air and vaporizes and evaporates, thereby achieving the purpose of humidifying the air. During this humidification process, the humidity of the air increases and the temperature decreases.

Using this solution, by setting up a humidifier, there is no need to set up an additional dehumidification unit, which is low cost and meets the requirements for cold air humidity and temperature in the computer room.

Figure 2 is a schematic structural diagram of the condensation module 12 in the air conditioning assembly provided by an embodiment of the present disclosure. Please refer to Figure 2. Optionally, in the above embodiment, the condensation module 12 includes multiple sets of outdoor heat exchange components 121, an exhaust manifold 122 and a liquid outlet manifold 123. Each outdoor heat exchange component 121 includes an outdoor fan 1211 and multiple Condenser 1212. The condenser 1212 is, for example, a fin heat exchanger. The disclosed embodiments are not limiting.

Please refer to Figure 2. Each condenser 1212 has an air inlet and a liquid outlet. The air inlet corresponds to the air inlet pipeline 1221 on the exhaust manifold 122. The input end of the exhaust manifold 122 is connected to the heat exchanger. The first output end of the exchange module 11 is connected, and each liquid outlet corresponds to the liquid outlet pipeline 1231 on the liquid outlet main pipe 123. The output end of the liquid outlet main pipe 123 and the input end of the throttling module 14 connect.

When all the outdoor heat exchange components 121 in the condensation module 12 are working, the gas refrigerant enters each condenser 1212 through each air inlet pipe 1221 on the exhaust manifold 122. The outdoor fan 1211 guides the outdoor natural cold source to the surroundings of the condenser 1212, thereby cooling the gas refrigerant inside the condenser 1221 to obtain liquid refrigerant. The liquid refrigerant enters the liquid outlet main pipe 123 through the liquid outlet pipe 1231 and converges. The final liquid refrigerant enters the throttling module 14.

It should be noted that although four outdoor heat exchanger assemblies 121 are shown in FIG. 2 , each dotted box represents an outdoor heat exchanger assembly 121 , and each heat exchanger assembly 121 includes two condensers 1212 . However, the embodiment of the present disclosure is not limiting. In other possible ways, the number of outdoor heat exchanger assemblies 121 and the number of condensers 1212 included in each outdoor heat exchanger assembly 121 can be flexibly set.

With this solution, the condensation module uses natural cold sources to cool the gas refrigerant, making full use of natural cold sources and saving water resources.

Optionally, in the embodiment of the present disclosure, the number of outdoor heat exchange components working simultaneously in the multiple groups of outdoor heat exchange components 121 is related to the outdoor temperature. When the outdoor temperature is in the first interval, the number of outdoor heat exchange components in the multiple groups of outdoor heat exchange components 121 is related to the outdoor temperature. The number of working outdoor heat exchange components is the first quantity; when the outdoor temperature is in the second interval, the number of working outdoor heat exchange components in the plurality of groups of outdoor heat exchange components is the second number, and the first interval and The second interval is two adjacent temperature intervals, the lowest temperature of the first interval is higher than the highest temperature of the second interval, and the first number is greater than the second number.

That is to say, the higher the outdoor temperature is, the greater the number of outdoor heat exchange assemblies 121 working simultaneously among the multiple groups of outdoor heat exchange assemblies 121 is. The lower the outdoor temperature, the smaller the number of outdoor heat exchange components 121 working at the same time. For example, the first interval is [25℃, 30℃] and the second interval is [20℃, 25℃). When the outdoor temperature is in the first interval, the first number is 3, that is, there are 3 outdoor heat exchangers at the same time. When the outdoor temperature is in the second range, the second quantity is 2. The lower the outdoor temperature, the fewer the number of outdoor heat exchanger components working simultaneously. The fewer the number of outdoor heat exchanger components working at the same time, the lower the energy consumption of the air conditioning unit.

Using this solution, by adjusting the number of outdoor heat exchange components working simultaneously according to changes in seasons and outdoor temperatures, the energy consumption of the air conditioning unit can be further reduced, and the purpose of making full use of natural cold sources while reducing the PUE value of the air conditioning unit can be achieved.

Figure 3 is a schematic structural diagram of a heat exchange module in an air conditioning assembly provided by an embodiment of the present disclosure. Please refer to Figure 3. Optionally, in the above embodiment, the heat exchange module 11 includes an evaporator 111 and a plurality of indoor fans 112. The plurality of indoor fans 112 are evenly arranged near the evaporator 111 and close to the air supply. On one side of the air channel, the plurality of indoor fans 112 are used to guide the indoor hot air to the evaporator 111, and the evaporator 111 is used to perform heat exchange between the indoor hot air and the throttling refrigerant. To obtain the cold air and the gas refrigerant.

The evaporator 111 may be an indoor fin heat exchanger or the like, which is not limited by the embodiment of the present disclosure. One evaporator 111 corresponds to multiple indoor fans 112. After the throttling refrigerant is input into the evaporator 111, when the indoor hot air passes through the evaporator 111, the throttling refrigerant absorbs heat and converts it into gas refrigerant. The gas refrigerant enters the condensation module 12 Double recycling uses cold air to enter the computer room through the air supply channel to cool electronic equipment such as servers.

With this solution, the evaporator and the indoor fan have a one-to-many relationship, with simple structure and low cost.

Figure 4 is a schematic structural diagram of the evaporator in Figure 3. Please refer to Figure 4. The evaporator 111 includes an inner tube 1111 and an outer tube 1112 having a receiving cavity. The inner tube 1111 is nested in the outer tube 1112. The tube wall of the inner tube 1111 and the outer tube 1112 An annular cavity is formed between the walls of the inner tube 1111. At least one through hole is provided on the wall of the inner tube 1111, as shown in the black circle in the figure. The through hole is connected to the output end of the throttling module, and the outer tube 1111 is connected to the output end of the throttling module. The tube wall of the tube 1112 is mesh-shaped, and the indoor hot air enters the annular cavity under the guidance of the indoor fan to conduct heat exchange with the throttling refrigerant in the accommodation cavity to obtain the cold air and the Gaseous refrigerant.

Please refer to Figure 4. The throttling refrigerant enters the accommodation cavity through the through hole on the inner tube 1111. When the indoor hot air reaches the annular cavity, the throttling refrigerant exchanges heat with the indoor hot air. The throttling refrigerant absorbs the heat conversion of the indoor hot air. It is a liquid refrigerant. The heat of the indoor hot air is absorbed and cold air is obtained. The cold air enters the computer room through the air supply channel to cool down the electronic equipment.

In Figure 4, outlets are provided on the inner tube 1111 on the side opposite to the through hole for throttling the refrigerant, as shown by the filled gray circles in the figure. These outlets are connected to the first output end of the heat exchange module. An output end is connected to the exhaust manifold 122 , and the gas refrigerant enters the exhaust manifold 122 through the outlet, and then enters the condenser 1212 in the condensation module 12 .

This solution uses an inner tube and a meshed outer tube to construct an evaporator, which facilitates the separation of refrigerant gas and cold air. It has a simple structure and low cost.

In the embodiment of the present disclosure, the modes of the air conditioning unit can be divided according to the number of outdoor heat exchanger components working simultaneously. For example, the condensation module of an air conditioning unit includes four outdoor heat exchange components. The mode in which all four outdoor heat exchange components work is called the first mode, the mode in which three outdoor heat exchange components work is called the second mode, and only the mode in which all four outdoor heat exchange components work is called the second mode. The mode with two outdoor heat exchange components working is called the third mode, and the mode with only one outdoor heat exchange component working is called the fourth mode. The five modes respectively correspond to different temperature intervals. The first mode corresponds to the first interval [25°C, 30°C], the second mode corresponds to the second interval [20°C, 25°C], and the third mode corresponds to the third interval [15 ℃, 20 ℃), the fourth mode corresponds to the fourth interval [0 ℃, 15 ℃), the preset temperature is 30 ℃. That is to say, when the temperature does not exceed 30 degrees Celsius, the air conditioning unit described in the embodiment of the present disclosure is used for temperature adjustment. The preset temperature can be set according to needs, and is not limited by the embodiment of the present disclosure.

Below, each of these modes will be described in detail.

FIG. 5A is a schematic diagram of the process of the air conditioning unit operating in the first mode according to the embodiment of the present disclosure. Please refer to Figure 5A. The heat exchange module of the air conditioning unit includes an evaporator 13 and

indoor fans

17a, 17b, 17c, and 17d. The condensation module includes an outdoor fan and a condenser. The outdoor fan includes 28, 38, 45, and 51. The condenser includes 26/30, 33/36, 40/43, and 47/50. The condensation module also includes an exhaust main pipe 24 and a liquid discharge pipe. Main pipe 1, the liquid main pipe 1 is provided with liquid outlet pipelines 27/31, 34/35, 41/42, 48/49, and the exhaust main pipe 24 is provided with air inlet pipelines 25/29, 32/37, 39/44, 46/52. The pressurizing module is, for example, the circulation pump 2 . The throttling module includes electronic expansion valve 3a, electronic expansion valve 3 and solenoid valve 4.

In addition, the air conditioning unit also includes some connecting pipes and other components, such as throttling

refrigerant distribution pipes

7, 8, 9, 10, 11, 12, liquid outlet pipe 5, connecting pipe 6, return pipe 14, and circulation pump 2. Humidifier 18, enter the one-way valve 22, one-way valve inlet pipeline 15, one-way valve outlet pipeline 23, etc. In actual implementation, the air conditioning unit may include more or fewer components, which is not limited by the embodiment of the present disclosure.

Please refer to Figure 5A. When the outdoor temperature is in the first range, all four outdoor heat exchange components work, namely

outdoor fans

28, 38, 45, 51, and condensers 26/30, 33/36, 40/43, 47/ 50 are working. Among them, the outdoor fan 28 corresponds to the condenser 26/30, the outdoor fan 38 corresponds to the condenser 33/36, the outdoor fan 45 corresponds to the condenser 40/43, and the outdoor fan 51 corresponds to the condenser 47/50.

During the temperature adjustment process, the indoor hot air from the data computer room enters the evaporator 13 under the guidance of the indoor air duct and driven by the

indoor fans

17a, 17b, 17c, and 17d. The indoor hot air and the throttling refrigerant undergo heat exchange in the evaporator 13 to obtain cold air and gas refrigerant. The cold air flows out from the indoor heat exchange channel of the evaporator 13 (i.e., the above-mentioned second output end). The cold air passes through the humidifier 18 for temperature and humidity treatment. The processed cold air is sent to the computer room through the air supply channel 19 to cool electronic equipment such as servers. .

The refrigerant gas flows through the return air pipe 14, the one-way valve inlet pipe 15, enters the one-way valve 22, and then flows through the one-way valve outlet pipe 23 into the exhaust manifold 24. After that, the gas refrigerant in the exhaust manifold 24 passes through the intake pipelines 25/29, 32/37, 39/44, and 46/52, and enters the condensers 26/30, 33/36, 40/43, and 47/50 respectively. . The

outdoor fans

28, 38, 45, and 51 guide the outdoor natural cold source to the surroundings of the condensers 26/30, 33/36, and 40/43, thereby cooling the gas refrigerant to obtain liquid refrigerant, and releasing the gas refrigerant. The heat is discharged into the outdoor atmosphere.

The liquid refrigerant enters the liquid outlet main pipe 1 through the outlet pipes 27/31, 34/35, 41/42, and 48/49. After being adjusted and pressurized by the circulation pump 2, it is divided into two channels and enters the throttling module for throttling. One path flows through the solenoid valve 4 and the electronic expansion valve 3b in sequence, and the other path flows through the electronic expansion valve 3a. After the liquid refrigerant reaches the electronic expansion valve 3a and is throttled, it enters the evaporator 13 through the

distribution pipelines

7, 8, and 9. After the liquid refrigerant reaches the electronic expansion valve 3b, it enters the evaporator 13 through the

distribution pipelines

10, 11, and 12. The throttling refrigerant entering the evaporator 13 continues to exchange heat with the indoor hot air, thereby forming a complete refrigeration cycle.

FIG. 5B is a schematic diagram of the process of the air conditioning unit operating in the second mode according to the embodiment of the present disclosure. Compared with Figure 5A, only three outdoor heat exchange components are working in the second mode. Figure 5B only shows the working outdoor heat exchange components, and does not show the outdoor heat exchange components that are not working, that is, in a closed state.

Please refer to Figure 5B. When the outdoor temperature is in the second range, only three outdoor heat exchange components work, namely,

outdoor fans

38, 45, and 51, and condensers 33/36, 40/43, and 47/50.

indoor fans

17a, 17b, 17c, and 17d. The indoor hot air and the throttling refrigerant undergo heat exchange in the evaporator 13 to obtain cold air and gas refrigerant. The cold air flows out from the indoor heat exchange channel of the evaporator 13 (i.e., the above-mentioned second output end). The cold air passes through the humidifier 18 for temperature and humidity treatment. The processed cold air is sent to the computer room through the air supply channel 19 to perform maintenance on electronic equipment such as servers. cool down.

The refrigerant gas flows through the return air pipe 14, the one-way valve inlet pipe 15, enters the one-way valve 22, and then flows through the one-way valve outlet pipe 23 into the exhaust manifold 24. After that, the gas refrigerant in the exhaust manifold 24 passes through the intake pipes 32/37, 39/44, and 46/52, and enters the condensers 33/36, 40/43, and 47/50 respectively. The

outdoor fans

38, 45 and 51 guide the outdoor natural cold source to the surroundings of the condensers 33/36, 40/43 and 47/50, thereby cooling the gas refrigerant to obtain liquid refrigerant and absorbing the heat released by the gas refrigerant. Emitted to the outdoor atmosphere.

The liquid refrigerant enters the liquid outlet main pipe 1 through the outlet pipes 34/35, 41/42, and 48/49. After being adjusted and pressurized by the circulation pump 2, it is divided into two channels and enters the throttling module for throttling. One path flows through the solenoid valve 4 and the electronic expansion valve 3b in sequence, and the other path flows through the electronic expansion valve 3a. After the liquid refrigerant reaches the electronic expansion valve 3a and is throttled, it enters the evaporator 13 through the

distribution pipelines

10, 11, and 12. The throttled refrigerant entering the evaporator 13 continues to exchange heat with the indoor hot air, thereby forming a complete refrigeration cycle.

FIG. 5C is a schematic diagram of the process of the air conditioning unit operating in the third mode according to the embodiment of the present disclosure. Compared with Figure 5B , only two outdoor heat exchange components are working in the third mode. Figure 5C only shows the working outdoor heat exchange components, and does not show the outdoor heat exchange components that are not working, that is, in a closed state.

Please refer to Figure 5C. When the outdoor temperature is in the third range, only two outdoor heat exchange components work, namely the

outdoor fans

45 and 51 and the condensers 40/43 and 47/50.

indoor fans

The refrigerant gas flows through the return air pipe 14, the one-way valve inlet pipe 15, enters the one-way valve 22, and then flows through the one-way valve outlet pipe 23 into the exhaust manifold 24. After that, the gas refrigerant in the exhaust manifold 24 passes through the intake pipes 39/44 and 46/52 and enters the condensers 40/43 and 47/50 respectively. The

outdoor fans

45 and 51 guide the outdoor natural cold source to around the condensers 40/43 and 47/50, thereby cooling the gas refrigerant to obtain liquid refrigerant, and discharging the heat released by the gas refrigerant into the outdoor atmosphere.

The liquid refrigerant enters the liquid outlet main pipe 1 through the outlet pipes 41/42 and 48/49. After being adjusted and pressurized by the circulation pump 2, it is divided into two channels and enters the throttling module for throttling. One path flows through the solenoid valve 4 and the electronic expansion valve 3b in sequence, and the other path flows through the electronic expansion valve 3a. After the liquid refrigerant reaches the electronic expansion valve 3a and is throttled, it enters the evaporator 13 through the

distribution pipelines

FIG. 5D is a schematic diagram of the process of the air conditioning unit operating in the fourth mode according to the embodiment of the present disclosure. Compared with Figure 5C, only one outdoor heat exchange component is working in the fourth mode. Figure 5D only shows the working outdoor heat exchange component, and does not show the outdoor heat exchange component that is not working, that is, in the closed state.

Please refer to Figure 5D. When the outdoor temperature is in the fourth interval, only one outdoor heat exchange component works, that is, the outdoor fan 51 and the condenser 47/50 work.

indoor fans

The refrigerant gas flows through the return air pipe 14, the one-way valve inlet pipe 15, enters the one-way valve 22, and then flows through the one-way valve outlet pipe 23 into the exhaust manifold 24. After that, the gas refrigerant in the exhaust manifold 24 passes through the intake pipes 46/52 and enters the condensers 47/50 respectively. The outdoor fan 51 guides the outdoor natural cold source to the surroundings of the condenser, 47/50, thereby cooling the gas refrigerant to obtain liquid refrigerant, and discharging the heat released by the gas refrigerant into the outdoor atmosphere.

The liquid refrigerant enters the liquid outlet main pipe 1 through the outlet pipe 48/49. After being adjusted and pressurized by the circulation pump 2, it is divided into two channels and enters the throttling module for throttling. One path flows through the solenoid valve 4 and the electronic expansion valve 3b in sequence, and the other path flows through the electronic expansion valve 3a. After the liquid refrigerant reaches the electronic expansion valve 3a and is throttled, it enters the evaporator 13 through the

distribution pipelines

According to the above, it can be seen that the air conditioning unit provided by the embodiment of the present disclosure adjusts the

outdoor fans

28, 38, 45, 51 and the

indoor fans

17a, 17b, 17c, 17d respectively according to the season or outdoor day and night temperature and indoor load. A stable target temperature is obtained on the indoor side, thereby reducing the power consumption of the heat exchange fans on both outdoor and indoor sides. Moreover, natural cooling can be used to obtain the target indoor temperature without starting the compressor, thus saving energy consumption.

Optionally, the above-mentioned air conditioning unit can also be equipped with a compressor 20 and the like. When the temperature of the outdoor machine room is higher than the required temperature of the indoor machine room, the compressor and condensation module are started to work partially to control the temperature of the outdoor machine room within the required temperature. Furthermore, when the electronic equipment in the data center computer room generates too much heat, causing the indoor computer room temperature to be much higher than the outdoor ambient temperature, and the indoor heat load increases, the output of the compressor and condensation module will be increased to reduce the temperature of the data center computer room. The temperature drops to the preset temperature. The preset temperature is, for example, 23 degrees Celsius, etc., which is not limited by the embodiment of the present disclosure.

Figure 6 is a schematic structural diagram of another air conditioning unit provided by an embodiment of the present disclosure. Please refer to Figure 6. In this embodiment, the air conditioning unit also includes a one-way valve 22 and a compressor 20. The one-way valve 22 has a one-way valve air inlet pipeline 15 and a one-way valve air outlet pipeline 23. The one-way valve air inlet pipeline 15 (input end) is connected to the return air pipeline 14 of the evaporator 13 (i.e., the first output end of the heat exchange module), and the one-way valve outlet pipeline 23 (output end) is connected to the input end of the exhaust manifold 24. The input end of the main pipe 24 is the input end of the condensation module.

The compressor 20 has a suction line 16 (input end) and a discharge line 21 (output end). The suction pipeline 16 is connected to the return pipeline 14 of the evaporator 13 (ie, the first output end of the heat exchange module), and the exhaust pipeline 21 is connected to the exhaust manifold 24 .

When the outdoor temperature is greater than or equal to the preset temperature, the compressor 20 works and the one-way valve 22 does not work; when the outdoor temperature is less than the preset temperature, the compressor 20 does not work and the one-way valve 22 does not work. One-way valve 22 operates.

Referring to FIG. 6 , the air conditioning unit according to the embodiment of the present disclosure may also be provided with a temperature sensor, etc., for detecting the outdoor temperature. When the outdoor temperature is less than or equal to the preset temperature, the gas refrigerant enters the condensation module through the one-way valve 22 and is cooled by a natural cold source.

When the outdoor temperature is greater than the preset temperature, the gas refrigerant enters the compressor, is compressed by the compressor and enters the condensation module, where it is cooled by mechanical refrigeration. Furthermore, when the electronic equipment in the data center computer room generates too much heat, causing the indoor computer room temperature to be much higher than the outdoor ambient temperature, and the indoor heat load increases, the output of the compressor and condensation module will be increased to reduce the temperature of the data center computer room. The temperature drops to the preset temperature. The indoor machine room temperature is, for example, 55°C, the outdoor ambient temperature is, for example, 30°C, and the preset temperature is, for example, 23°C.

Based on the above air conditioning unit, embodiments of the present disclosure also provide a data center computer room, in which the air conditioning unit as described above is installed.

An embodiment of the present disclosure also provides a control method for an air conditioning unit, which is applied to the above air conditioning unit. Figure 7 is a flow chart of a control method for an air conditioning unit provided by an embodiment of the present disclosure, including:

701. When the outdoor temperature is lower than the preset temperature, use the heat exchange module to perform heat exchange on indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant;

702. Use the condensation module to condense the gas refrigerant into liquid refrigerant liquid;

703. Use the pressurizing module to pressurize the liquid refrigerant to obtain pressurized refrigerant;

704. Use the throttling module to throttle the liquid refrigerant to obtain the throttling refrigerant, and input the throttling refrigerant to the heat exchange module.

For the specific implementation process, please refer to the above description of the air conditioning unit and will not be described again here.

Optionally, when the outdoor temperature is lower than the required temperature of the computer room, the air conditioning unit determines the temperature interval to which the outdoor temperature belongs, and determines the number of outdoor heat exchange components working in the multiple sets of outdoor heat exchange components based on the temperature interval. . Afterwards, the outdoor heat exchange components matching the stated number are turned on, and the gas refrigerant is condensed into liquid refrigerant using the turned on outdoor heat exchange components. The temperature required in the computer room is also called a preset temperature, etc., which may be 23°C, etc., and is not limited by the embodiment of the present disclosure.

For details, please refer to the description of FIGS. 5A to 5D above, which will not be described again here.

Embodiments of the present disclosure also provide a computer-readable storage medium in which computer instructions are stored, and when executed by a processor, the computer instructions are used to implement the control method of an air-conditioning unit as described above.

An embodiment of the present disclosure also provides a computer program product. The computer program product includes a computer program. When the computer program is executed by a processor, the above-mentioned control method for an air conditioning unit is implemented.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common common sense or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

An air conditioning unit, characterized in that it includes: a heat exchange module, a condensation module, a pressurizing module and a throttling module. The first output end of the heat exchange module is connected to the input end of the condensation module. The condensation module The output end of the pressure module is connected to the input end of the pressure module, the output end of the pressure module is connected to the input end of the throttling module, and the output end of the throttling module is connected to the input end of the heat exchange module. connection, the second output end of the heat exchange module leads to the air supply channel, where:

The heat exchange module is used to perform heat exchange on indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant when the outdoor temperature is lower than the preset temperature, and outputs the gas refrigerant through the first output end. The second output end sends the cold air into the electronic device through the air supply channel;

The condensation module is used to condense the gas refrigerant into liquid refrigerant;

The pressurizing module is used to pressurize the liquid refrigerant to obtain pressurized refrigerant;

The throttling module is used to throttle the pressurized refrigerant to obtain the throttling refrigerant, and input the throttling refrigerant to the heat exchange module.
The air conditioning unit according to claim 1, characterized in that the condensation module includes multiple sets of outdoor heat exchange components, exhaust main pipes and liquid outlet main pipes, each outdoor heat exchange component includes an outdoor fan and at least one condenser, and each outdoor heat exchange component includes an outdoor fan and at least one condenser. Each condenser has an air inlet and a liquid outlet. The air inlet corresponds to the air inlet pipeline on the exhaust manifold. The input end of the exhaust manifold is connected to the first output end of the heat exchange module. , each liquid outlet corresponds to the liquid outlet pipeline on the liquid outlet main pipe, and the output end of the liquid outlet main pipe is connected to the input end of the throttling module.
The air conditioning unit according to claim 2, characterized in that:

The number of outdoor heat exchange components working in the multiple groups of outdoor heat exchange components is related to the temperature interval to which the outdoor temperature belongs. When the outdoor temperature is in the first interval, the number of outdoor heat exchange components working in the multiple groups of outdoor heat exchange components The quantity is the first quantity;

When the outdoor temperature is in the second interval, the number of outdoor heat exchange assemblies working in the plurality of groups of outdoor heat exchange assemblies is the second number, and the first interval and the second interval are two adjacent temperature intervals. , the lowest temperature of the first interval is higher than the highest temperature of the second interval, and the first number is greater than the second number.
The air conditioning unit according to any one of claims 1 to 3, characterized in that the heat exchange module includes an evaporator and a plurality of indoor fans, and the plurality of indoor fans are evenly arranged near the evaporator and close to the air supply unit. On one side of the air channel, the plurality of indoor fans are used to guide the indoor hot air to the evaporator, and the evaporator is used to perform heat exchange between the indoor hot air and the throttling refrigerant to obtain the Cold air and the gas refrigerant.
The air conditioning unit according to claim 4, characterized in that the evaporator includes an inner tube and an outer tube having a receiving cavity, the inner tube is sleeved in the outer tube, and the tube wall of the inner tube and the An annular cavity is formed between the walls of the outer tube. At least one through hole is provided on the wall of the inner tube. The through hole is connected to the output end of the throttling module. The wall of the outer tube is in the shape of a mesh. The indoor hot air enters the annular cavity under the guidance of the indoor fan to conduct heat exchange with the throttling refrigerant in the accommodation cavity to obtain the cold air and the gas refrigerant.
The air conditioning unit according to any one of claims 1 to 5, further comprising a humidifier, which is disposed in the air supply channel and used to perform temperature and humidity treatment on the cold air to obtain Cool air that meets target temperature and target humidity.
The air conditioning unit according to claim 6, wherein the humidifier is a wet film humidifier.
A data center computer room, characterized by comprising: a computer room, in which the air conditioning unit according to any one of claims 1-7 is installed.
A control method for an air conditioning unit, characterized in that it is applied to a heat exchange module, a condensation module, a pressurization module and a throttling module, and the first output end of the heat exchange module is connected to the input end of the condensation module, The output end of the condensation module is connected to the input end of the pressurizing module, the output end of the pressurizing module is connected to the input end of the throttling module, and the output end of the throttling module is connected to the heat exchanger module. The input end of the module is connected, and the second output end of the heat exchange module is connected to the air supply channel. The method includes:

When the outdoor temperature is lower than the preset temperature, the heat exchange module is used to perform heat exchange on indoor hot air and throttling refrigerant to obtain cold air and gas refrigerant;

using the condensation module to condense the gas refrigerant into a liquid refrigerant liquid;

Use the pressurizing module to pressurize the liquid refrigerant to obtain pressurized refrigerant;

The pressurized refrigerant is throttled using the throttling module to obtain the throttled refrigerant, and the throttled refrigerant is input to the heat exchange module.
The method according to claim 9, wherein the condensation module at least includes multiple sets of outdoor heat exchange components, and using the condensation module to condense the gas refrigerant into liquid refrigerant liquid includes:

Determine the temperature interval to which the outdoor temperature belongs, and determine the number of outdoor heat exchange assemblies operating in the plurality of sets of outdoor heat exchange assemblies according to the temperature interval;

Open the specified number of outdoor heat exchange components, and use the opened outdoor heat exchange components to condense the gas refrigerant into liquid refrigerant.