WO2020177195A1 - Air conditioning system with emergency refrigeration function - Google Patents

Abstract

Disclosed is an air conditioning system with emergency refrigeration function, comprising an evaporation heat transfer unit (1), a condensation heat transfer unit (4) used for cooling the refrigerant, an emergency refrigeration heat transfer unit (3) used for providing auxiliary cold source to cool the refrigerant, and a refrigerant supercharging unit (2) used for transporting the cooled refrigerant to the evaporation heat transfer unit (1). The evaporation heat transfer unit (1) comprises an evaporator (1-2) and a first fan (1-1); a refrigerant outlet of the evaporator (1-2) is connected with a refrigerant inlet of the condensation heat transfer unit (4) and a refrigerant inlet of the emergency refrigeration heat transfer unit (3); a refrigerant outlet of the condensation heat transfer unit (4) and a refrigerant outlet of the emergency refrigeration heat transfer unit (3) are respectively connected with a refrigerant inlet of the refrigerant supercharging unit (2); and a refrigerant outlet of the refrigerant supercharging unit (2) is connected with a refrigerant inlet of the evaporator (1-2). Added an emergency refrigeration heat transfer unit, the air conditioning system has the emergency refrigeration function, thereby preventing partial high temperature in the machine room when the air conditioning system halts for a short time and avoiding damage to machine room devices.

Description

Air conditioning system with emergency refrigeration function Technical field

The utility model relates to the technical field of data center computer room refrigeration, and more specifically, to an air conditioning system with emergency refrigeration function.

Background technique

The data center computer room is a special place that needs to provide cooling conditions all year round. When the air conditioning system of the computer room is shut down for a short time due to objective reasons, the entire data center computer room is particularly prone to short-term local high temperature, especially For a data room with a super high heat flux, the temperature will rise quickly, which may easily cause damage to related equipment. In view of this situation, it is necessary to provide a computer room air-conditioning system with emergency cooling function to ensure that when the above situation occurs, it can ensure the stable and reliable operation of the entire data center computer room equipment.

technical problem

The technical problem to be solved by the utility model is to provide an air conditioning system with emergency refrigeration function.

Technical solutions

The technical solution adopted by the utility model to solve the technical problem is: construct an air conditioning system with emergency refrigeration function, which is characterized by including an evaporative heat exchange unit, a condensation heat exchange unit for cooling refrigerant, and an auxiliary cold source. An emergency refrigeration and heat exchange unit for cooling the refrigerant and a refrigerant booster unit that transports the refrigerant cooled by the condensation heat exchange unit and the emergency refrigeration and heat exchange unit to the evaporative heat exchange unit;

The evaporative heat exchange unit includes an evaporator for evaporative heat exchange and a first fan for blowing the evaporator; the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the condensation heat exchange unit and the The refrigerant inlet of the emergency refrigeration and heat exchange unit, the refrigerant outlet of the condensation heat exchange unit and the refrigerant outlet of the emergency refrigeration heat exchange unit are respectively connected to the refrigerant inlet of the refrigerant booster unit, and the refrigerant The refrigerant outlet of the supercharging unit is connected to the refrigerant inlet of the evaporator.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the refrigerant outlet of the evaporator is connected to the refrigerant inlet of the condensation heat exchange unit, and the refrigerant outlet of the condensation heat exchange unit passes through The three-way valve is respectively connected to the refrigerant inlet of the emergency refrigeration and heat exchange unit and the refrigerant inlet of the refrigerant booster unit, and the refrigerant outlet of the emergency refrigeration and heat exchange unit is connected to the refrigeration of the refrigerant booster unit.剂入。 Agent entrance.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the refrigerant outlet of the evaporator is respectively connected to the refrigerant inlet of the condensation heat exchange unit and the emergency refrigeration heat exchange through a three-way valve. The refrigerant inlet of the unit, the refrigerant outlet of the condensation heat exchange unit and the refrigerant outlet of the emergency refrigeration heat exchange unit are respectively connected to the refrigerant inlet of the refrigerant booster unit.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the condensing heat exchange unit includes a condenser for condensing heat exchange and a second fan for supplying air to the condenser. The refrigerant inlet of the condenser is connected to the refrigerant outlet of the evaporator, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the refrigerant supercharging unit.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the emergency refrigeration and heat exchange unit includes a heat exchanger for heat exchange between the auxiliary cold source and the refrigerant, and an auxiliary cold source is stored. The cold storage box and the auxiliary cold source circulating pump that sends the auxiliary cold source in the cold storage box to the heat exchanger;

The refrigerant inlet of the heat exchanger is connected to the refrigerant outlet of the evaporator, and the refrigerant outlet of the heat exchanger is connected to the refrigerant inlet of the refrigerant supercharging unit;

The cold source outlet of the cold storage box is connected to the cold source inlet of the heat exchanger, the cold source outlet of the heat exchanger is connected to the cold source inlet of the cold storage box, and the auxiliary cold source circulating pump is arranged at the cold storage box. Between the cold source outlet of the box and the cold source inlet of the heat exchanger.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the refrigerant outlet of the condensation heat exchange unit is connected to the refrigerant inlet of the refrigerant boosting unit and the refrigerant inlet through a three-way valve. The refrigerant inlet of the heater.

Preferably, in the air conditioning system with emergency refrigeration function of the present utility model, the emergency refrigeration and heat exchange unit further includes an auxiliary cold source supply device for providing an auxiliary cold source, and the auxiliary cold source supply device The source outlet is connected to the cold source inlet of the cold storage tank.

Preferably, in the air-conditioning system with emergency refrigeration function of the present invention, the refrigerant pressurizing unit includes an accumulator for storing refrigerant and a refrigerant pump for pressurizing the refrigerant;

The refrigerant inlet of the accumulator is connected to the refrigerant outlet of the condensation heat exchange unit and the refrigerant outlet of the emergency refrigeration and heat exchange unit, and the refrigerant outlet of the accumulator is connected to the refrigerant pump. A refrigerant inlet, and the refrigerant outlet of the refrigerant pump is connected to the refrigerant inlet of the evaporative heat exchange unit.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, a one-way valve is provided at both the refrigerant outlet of the emergency refrigeration and heat exchange unit and the refrigerant outlet of the refrigerant booster unit .

Preferably, the air-conditioning system with emergency refrigeration function of the present invention further includes a power supply for supplying power to the air-conditioning system. The power supply includes a mains power supply and a backup power supply. The backup power supply includes a UPS and a backup power supply. Intermittent power supply.

Beneficial effect

The implementation of the air conditioning system with emergency refrigeration function of the present invention has the following beneficial effects: the air conditioning system of the present invention adds an emergency refrigeration and heat exchange unit, which can be used to provide auxiliary cooling when the air conditioning system is shut down for a short time. The source cools the refrigerant, and the cooled refrigerant is transmitted to the evaporator to cool the computer room, so that the air-conditioning system has emergency cooling function, preventing local high temperature inside the computer room when the air-conditioning system of the computer room is shut down for a short time, and even causing the computer room Damage to the equipment.

Description of the drawings

In the following, the utility model will be further described in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

Figure 1 is a structural diagram of an air conditioning system with emergency refrigeration function of the present invention.

The best mode of the invention

In order to have a clearer understanding of the technical features, purpose and effects of the present invention, the specific implementation of the present invention will now be described in detail with reference to the drawings.

As shown in Figure 1, the air-conditioning system with emergency refrigeration function of the present invention includes an evaporative heat exchange unit 1, a condensation heat exchange unit 4 for cooling the refrigerant, and an emergency refrigeration heat exchange that provides an auxiliary cold source to cool the refrigerant. The unit 3 and the refrigerant pressurizing unit 2 that transports the refrigerant cooled by the condensation heat exchange unit 4 and the emergency refrigeration heat exchange unit 3 to the evaporative heat exchange unit 1; the evaporative heat exchange unit 1 includes an evaporation for evaporative heat exchange 1-2 and the first fan 1-1 that supplies air to the evaporator 1-2; the refrigerant outlet of the evaporator 1-2 is connected to the refrigerant inlet of the condensation heat exchange unit 4 and the refrigerant of the emergency refrigeration heat exchange unit 3 The inlet, the refrigerant outlet of the condensation heat exchange unit 4 and the refrigerant outlet of the emergency cooling and heat exchange unit 3 are respectively connected to the refrigerant inlet of the refrigerant booster unit 2, and the refrigerant outlet of the refrigerant booster unit 2 is connected to the evaporator 1- 2 refrigerant inlet.

Specifically, the air conditioning system with emergency cooling function includes an indoor unit located indoors and an outdoor unit located outdoors. The outdoor unit and the indoor unit are connected to each other to complete the cooling of the data center computer room. The temperature of the refrigerant rises after the cooling of the indoor unit is completed. The heat exchange unit of the outdoor unit exchanges heat with the refrigerant to cool down and cool the refrigerant. The cooled refrigerant then returns to the indoor unit along the refrigerant circulation circuit for cooling. . Among them, the heat exchange unit of the outdoor unit includes a condensation heat exchange unit 4 and an emergency refrigeration heat exchange unit 3. The condensation heat exchange unit 4 adopts air-cooled heat exchange, that is, cold air-refrigerant heat exchange is performed on the refrigerant through cold air; The emergency refrigeration and heat exchange unit 3 uses liquid-cooled heat exchange, that is, auxiliary cold source-refrigerant heat exchange is performed on the refrigerant through auxiliary cold sources such as chilled water or cooling water.

In the embodiment shown in Figure 1, the refrigerant outlet of the evaporator 1-2 is connected to the refrigerant inlet of the condensation heat exchange unit 4, and the refrigerant outlet of the condensation heat exchange unit 4 is respectively connected to the emergency refrigeration and heat exchange unit through a three-way valve The refrigerant inlet of 3 and the refrigerant inlet of the refrigerant booster unit 2, and the refrigerant outlet of the emergency cooling and heat exchange unit 3 is connected to the refrigerant inlet of the refrigerant booster unit 2. In other embodiments of the present invention, the refrigerant outlet of the evaporator 1-2 may also be connected to the refrigerant inlet of the condensation heat exchange unit 4 and the refrigerant inlet of the emergency refrigeration heat exchange unit 3 through a three-way valve. The refrigerant outlet of the heat exchange unit 4 and the refrigerant outlet of the emergency cooling and heat exchange unit 3 are respectively connected to the refrigerant inlet of the refrigerant booster unit 2.

In the present invention, the type of the evaporator 1-2 is not limited, and it can be a plate heat exchanger, a double-pipe heat exchanger, a shell-and-tube heat exchanger, etc., which is not limited by the present invention. Preferably, in the air-conditioning system with emergency refrigeration function of the present invention, a filter drier can also be provided between the refrigerant inlet of the evaporator 1-2 and the refrigerant outlet of the refrigerant booster unit 2, using dry filtration To remove impurities and moisture.

Referring to Figure 1, the condensation heat exchange unit 4 includes a condenser 4-2 for condensation heat exchange and a second fan 4-1 for supplying air to the condenser 4-2. The refrigerant inlet of the condenser 4-2 is connected to an evaporator. The refrigerant outlet of 1-2 and the refrigerant outlet of the condenser 4-2 are connected to the refrigerant inlet of the refrigerant booster unit 2. Preferably, the refrigerant outlet of the condenser 4-2 is connected to the refrigerant inlet of the refrigerant booster unit 2 and the refrigerant inlet of the emergency refrigeration and heat exchange unit 3 through a three-way valve. The temperature of the refrigerant rises after cooling in the evaporator 1-2, and the refrigerant exchanges heat through the condenser 4-2 to cool the refrigerant, and the cooled refrigerant returns to the evaporator 1-2 for cooling and cooling . The type of the condenser 4-2 is not limited, and it can be a plate heat exchanger, a double-pipe heat exchanger, a shell-and-tube heat exchanger, and any other type, which is not limited by the present invention.

Referring to Figure 1, the emergency refrigeration and heat exchange unit 3 includes a heat exchanger 3-2, a cold storage tank 3-3 and an auxiliary cold source circulating pump 3-1. Among them, the heat exchanger 3-2 is used to exchange heat between the auxiliary cold source and the refrigerant, the cold storage tank 3-3 is used to store the auxiliary cold source, and the auxiliary cold source circulating pump 3-1 is used to transfer the cold storage tank 3-3. The auxiliary cold source is sent to the heat exchanger 3-2. Specifically, the refrigerant inlet of the heat exchanger 3-2 is connected to the refrigerant outlet of the evaporator 1-2, and the refrigerant outlet of the heat exchanger 3-2 is connected to the refrigerant inlet of the refrigerant booster unit 2. The refrigerant is evaporating After the refrigeration of the 1-2 completes the temperature rise, the refrigerant can be heat exchanged through the cold storage heat exchanger 3-2 to cool the refrigerant, and the cooled refrigerant returns to the evaporator 1-2 for cooling and cooling. Preferably, the refrigerant outlet of the condenser 4-2 may be respectively connected to the refrigerant inlet of the accumulator 2-2 and the refrigerant inlet of the heat exchanger 3-2 through a three-way valve. Alternatively, the refrigerant outlet of the evaporator 1-2 is connected to the refrigerant inlet of the condenser 4-2 and the refrigerant inlet of the heat exchanger 3-2 through a three-way valve, respectively.

The cold source outlet of the cold storage tank 3-3 is connected to the cold source inlet of the heat exchanger 3-2, the cold source outlet of the heat exchanger 3-2 is connected to the cold source inlet of the cold storage tank 3-3, and the auxiliary cold source circulating pump 3-1 It is arranged between the cold source outlet of the cold storage tank 3-3 and the cold source inlet of the heat exchanger 3-2. A closed water circulation loop is formed between the cold storage tank 3-3 and the heat exchanger 3-2: the auxiliary cold source flows out of the cold storage tank 3-3, and is sent to the cold storage heat exchanger 3-2 through the cold storage water pump, where it exchanges heat After the heat exchange in the device 3-2, the temperature rises, and the auxiliary cold source after the temperature rises flows back to the cold storage tank 3-3.

Specifically, the heat exchanger 3-2 includes two heat exchange parts for heat exchange, namely a first heat exchange part and a second heat exchange part. The first heat exchange part is arranged in the water circulation circuit, the second heat exchange part is arranged in the refrigerant circulation circuit, and the cold storage tank 3-3 is connected to the first heat exchange part and sends the auxiliary cold source to the first heat exchange part; The two heat exchange parts are respectively connected to the refrigerant outlet of the evaporator 1-2 and the refrigerant inlet of the refrigerant booster unit 2, and the refrigerant from the evaporator 1-2 flows into the second heat exchange part. The first heat exchange part exchanges heat with the refrigerant in the second heat exchange part through the auxiliary cold source provided by the cold storage tank 3-3 to cool the refrigerant; after the heat exchange, the auxiliary cold source flows from the first heat exchange part Returning to the cold storage tank 3-3, the cooled refrigerant enters the evaporator 1-2 through the refrigerant supercharging unit 2, and performs indoor cooling and temperature reduction. The type of the heat exchanger 3-2 is not limited, and it can be a plate heat exchanger, a double-pipe heat exchanger, a shell-and-tube heat exchanger, etc., which is not limited by the present invention.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the emergency refrigeration and heat exchange unit 3 further includes an auxiliary cold source supply device for providing an auxiliary cold source, and the cold source outlet of the auxiliary cold source supply device is connected to the cold storage box 3-3 cold source entrance. Specifically, the cold source outlet of the auxiliary cold source supply device is connected to the cold source inlet of the cold storage tank 3-3, the cold source outlet of the cold storage tank 3-3 is connected to the cold source inlet of the auxiliary cold source supply device, and the auxiliary cold source supply device and cold storage A closed loop is formed between boxes 3-3. The auxiliary cold source supply device includes a refrigerator, through which the cold source can be processed to a preset temperature. When the temperature of the auxiliary cold source in the cold storage tank 3-3 is higher than the preset temperature, the auxiliary cold source in the cold storage tank 3-3 The cold source flows back to the auxiliary cold source supply device, and is processed by the refrigerator into a cold source that meets the temperature requirements. The auxiliary cold source flows out from the auxiliary cold source supply device and is sent to the cold storage tank 3-3. Optionally, the auxiliary cold source can be chilled water or chilled water, preferably chilled water with a temperature lower than 20°C, because chilled water has a lower temperature and a good cooling effect. When the air conditioning system is shut down for a short time, emergency response can be used. The refrigeration and heat exchange unit 3 provides an auxiliary cold source for the air conditioning system to cool faster to match the cooling load of the data center computer room, and prevent local high temperature inside the computer room when the air conditioning system is shut down for a short time, and even damage to the equipment in the computer room.

Preferably, in the air conditioning system with emergency refrigeration function of the present invention, the refrigerant pressurizing unit 2 includes an accumulator 2-2 for storing refrigerant and a refrigerant pump 2-1 for pressurizing the refrigerant; The refrigerant can be an existing commonly used refrigerant, such as fluorine. The refrigerant inlet of the accumulator 2-2 is connected to the refrigerant outlet of the condensation heat exchange unit 4 and the refrigerant outlet of the emergency refrigeration heat exchange unit 3, and the refrigerant outlet of the accumulator 2-2 is connected to the refrigerant pump 2-1 The refrigerant inlet of the refrigerant pump 2-1 is connected to the refrigerant inlet of the evaporative heat exchange unit 1. Specifically, in the embodiment shown in FIG. 1, the refrigerant outlet of the evaporator 1-2 is connected to the refrigerant inlet of the condenser 4-2, and the refrigerant outlet of the condenser 4-2 is respectively connected to the accumulator 2-2. The refrigerant inlet of the heat exchanger 3-2 and the refrigerant inlet of the heat exchanger 3-2, the refrigerant outlet of the heat exchanger 3-2 is connected to the refrigerant inlet of the accumulator 2-2, and the refrigerant outlet of the accumulator 2-2 is connected to refrigeration The refrigerant inlet of the refrigerant pump 2-1 and the refrigerant outlet of the refrigerant pump 2-1 are connected to the refrigerant inlet of the evaporator 1-2. Preferably, a one-way valve is provided at both the refrigerant outlet of the emergency refrigeration and heat exchange unit 3 and the refrigerant outlet of the refrigerant booster unit 2.

Preferably, the air-conditioning system with emergency refrigeration function of the present invention further includes a power supply for the air-conditioning system. The power supply includes a commercial power supply and a backup power supply. The backup power supply includes UPS (Uninterruptible Power Supply). System/Uninterruptible Power Supply) uninterruptible power supply. When the mains power supply is disconnected, it can automatically switch to the backup power supply, and the backup power supply is used to ensure the normal power supply of the air conditioning system. Specifically, in the present utility model, a dual power supply design is provided for the first fan 1-1, the second fan 4-1, the refrigerant pump 2-1, and the auxiliary cold source circulating pump 3-1, that is, the first fan 1 -1. The second fan 4-1, the refrigerant pump 2-1 and the auxiliary cold source circulating pump 3-1 are connected to the mains power supply and the backup power supply in the power supply, and the mains power supply and the backup power supply in the power supply supply the second A fan 1-1, a second fan 4-1, a refrigerant pump 2-1 and an auxiliary cold source circulating pump 3-1 supply power. When the mains power supply is disconnected, it can automatically switch to the standby power supply to supply power to the first fan 1-1, the second fan 4-1, the refrigerant pump 2-1 and the auxiliary cold source circulating pump 3-1 to ensure the first The normal operation of the fan 1-1, the second fan 4-1, the refrigerant pump 2-1 and the auxiliary cold source circulating pump 3-1 realizes the emergency cooling effect of the air conditioning system.

The specific implementation process of the air-conditioning system with emergency refrigeration function of the present invention is as follows:

The temperature of the refrigerant increases after heat exchange in the evaporator 1-2. When the mains power supply is normally supplied, the refrigerant after the heat exchange of the evaporator 1-2 can be heated through the condenser 4-2 Exchange to cool down the refrigerant, the cooled refrigerant flows into the accumulator 2-2, and then the refrigerant in the accumulator 2-2 is pressurized by the refrigerant pump 2-1 and then sent to the evaporator 1-2 , Carry out indoor cooling and cooling; in the case of the mains power interruption, the standby power is activated as the auxiliary cold source of the first fan 1-1, the second fan 4-1, the refrigerant pump 2-1 and the emergency cooling and heat exchange unit 3 The circulating pump 3-1 supplies power. At this time, the emergency refrigeration and heat exchange unit 3 is started to cool the refrigerant, that is, the heat exchange of the refrigerant after the heat exchange of the evaporator 1-2 is carried out through the heat exchanger 3-2 to make the refrigeration The refrigerant is cooled down, and the cooled refrigerant flows into the accumulator 2-2, and the refrigerant in the accumulator 2-2 is pressurized by the refrigerant pump 2-1 and then sent to the evaporator 1-2 for indoor cooling Cooling down, to achieve the role of emergency refrigeration, to prevent local high temperature inside the computer room due to a short-term power failure of the air-conditioning system, and even damage to the equipment in the computer room, to ensure the stable and reliable operation of the equipment in the entire data center.

In summary, the emergency refrigeration and heat exchange unit 3 is added to the air conditioning system with emergency refrigeration function of the present invention, and the emergency refrigeration and heat exchange unit 3 can be used to provide an auxiliary cold source to cool the refrigerant when the air conditioning system is shut down for a short time. , The cooled refrigerant is transmitted to the evaporator 1-2 to cool the computer room, so that the air-conditioning system has emergency cooling function, preventing local high temperature inside the computer room when the air-conditioning system of the computer room is shut down for a short time, and even causing damage to the equipment in the computer room . The air-conditioning system with emergency refrigeration function of the utility model can be applied in data center computer rooms, especially data center computer rooms with high heat flux and high heat load, which can effectively prevent local high temperature in the computer room caused by the shutdown of the air-conditioning system due to objective reasons , And even cause damage to equipment in the computer room.

It is understandable that the above examples only express the preferred embodiments of the present utility model. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present utility model patent; it should be pointed out that for ordinary people in the field For the technicians, without departing from the concept of the utility model, the above technical features can be freely combined, and several modifications and improvements can be made. These all belong to the scope of protection of the utility model; therefore, everything with this utility model All equivalent transformations and modifications made to the scope of the new claims shall fall within the scope of the claims of the present invention.

Claims (10)

1. An air conditioning system with emergency refrigeration function, which is characterized by comprising an evaporative heat exchange unit (1), a condensation heat exchange unit (4) for cooling refrigerant, and an emergency refrigeration system that provides an auxiliary cold source to cool the refrigerant The heat exchange unit (3) and the refrigerant supercharging unit (1) that transports the refrigerant cooled by the condensation heat exchange unit (4) and the emergency refrigeration heat exchange unit (3) to the evaporative heat exchange unit (1) 2);

   The evaporative heat exchange unit (1) includes an evaporator (1-2) for evaporating heat exchange and a first fan (1-1) for supplying air to the evaporator (1-2); the evaporator The refrigerant outlet of (1-2) connects the refrigerant inlet of the condensation heat exchange unit (4) and the refrigerant inlet of the emergency refrigeration heat exchange unit (3), and the refrigeration of the condensation heat exchange unit (4) The refrigerant outlet and the refrigerant outlet of the emergency refrigeration and heat exchange unit (3) are respectively connected to the refrigerant inlet of the refrigerant boosting unit (2), and the refrigerant outlet of the refrigerant boosting unit (2) is connected to the outlet The refrigerant inlet of the evaporator (1-2).
2. The air conditioning system with emergency refrigeration function according to claim 1, characterized in that the refrigerant outlet of the evaporator (1-2) is connected to the refrigerant inlet of the condensation heat exchange unit (4), and the condensation The refrigerant outlet of the heat exchange unit (4) is respectively connected to the refrigerant inlet of the emergency refrigeration and heat exchange unit (3) and the refrigerant inlet of the refrigerant booster unit (2) through a three-way valve. The refrigerant outlet of the heat exchange unit (3) is connected to the refrigerant inlet of the refrigerant supercharging unit (2).
3. The air conditioning system with emergency refrigeration function according to claim 1, wherein the refrigerant outlet of the evaporator (1-2) is connected to the refrigerant of the condensation heat exchange unit (4) through a three-way valve. The inlet and the refrigerant inlet of the emergency refrigeration and heat exchange unit (3), the refrigerant outlet of the condensation heat exchange unit (4) and the refrigerant outlet of the emergency refrigeration and heat exchange unit (3) are respectively connected to the refrigeration The refrigerant inlet of the booster unit (2).
4. The air conditioning system with emergency refrigeration function according to claim 1, characterized in that, the condensation heat exchange unit (4) comprises a condenser (4-2) for condensation heat exchange and the condenser (4) -2) The second fan (4-1) for air supply, the refrigerant inlet of the condenser (4-2) is connected to the refrigerant outlet of the evaporator (1-2), and the condenser (4- The refrigerant outlet of 2) is connected to the refrigerant inlet of the refrigerant supercharging unit (2).

   To
5. The air conditioning system with emergency refrigeration function according to claim 1, characterized in that, the emergency refrigeration and heat exchange unit (3) comprises a heat exchanger (3-for heat exchange between the auxiliary cold source and the refrigerant). 2). The cold storage tank (3-3) storing the auxiliary cold source and the auxiliary cold source circulating pump that sends the auxiliary cold source in the cold storage tank (3-3) to the heat exchanger (3-2) (3-1);

   The refrigerant inlet of the heat exchanger (3-2) is connected to the refrigerant outlet of the evaporator (1-2), and the refrigerant outlet of the heat exchanger (3-2) is connected to the refrigerant booster The refrigerant inlet of unit (2);

   The cold source outlet of the cold storage box (3-3) is connected to the cold source inlet of the heat exchanger (3-2), and the cold source outlet of the heat exchanger (3-2) is connected to the cold storage box (3) -3) the cold source inlet, the auxiliary cold source circulating pump (3-1) is arranged at the cold source outlet of the cold storage tank (3-3) and the cold source inlet of the heat exchanger (3-2) between.
6. The air conditioning system with emergency refrigeration function according to claim 5, characterized in that the refrigerant outlet of the condensation heat exchange unit (4) is connected to the refrigeration of the refrigerant booster unit (2) through a three-way valve. Refrigerant inlet and the refrigerant inlet of the heat exchanger (3-2).
7. The air conditioning system with emergency refrigeration function according to claim 5 or 6, characterized in that the emergency refrigeration and heat exchange unit (3) further comprises an auxiliary cold source supply device for providing an auxiliary cold source, and the auxiliary cold source The cold source outlet of the source supply device is connected to the cold source inlet of the cold storage tank (3-3).
8. The air-conditioning system with emergency refrigeration function according to claim 1, characterized in that the refrigerant pressurizing unit (2) includes a liquid reservoir (2-2) for storing refrigerant and Supercharged refrigerant pump (2-1);

   The refrigerant inlet of the accumulator (2-2) is respectively connected to the refrigerant outlet of the condensation heat exchange unit (4) and the refrigerant outlet of the emergency refrigeration heat exchange unit (3), and the accumulator The refrigerant outlet of (2-2) is connected to the refrigerant inlet of the refrigerant pump (2-1), and the refrigerant outlet of the refrigerant pump (2-1) is connected to the evaporative heat exchange unit (1) Refrigerant inlet.
9. The air conditioning system with emergency refrigeration function according to claim 1, wherein the refrigerant outlet of the emergency refrigeration and heat exchange unit (3) and the refrigerant outlet of the refrigerant booster unit (2) All are equipped with one-way valves.

   To
10. The air-conditioning system with emergency refrigeration function according to any one of claims 1-9, further comprising a power supply for supplying power to the air-conditioning system, and the power supply includes a mains power supply and a backup power supply. Backup power includes UPS uninterruptible power supply.