Multi-connected fluorine pump air conditioning unit

Abstract

The utility model relates to the technical field of air conditioners, in particular to a multi-connected fluorine pump air conditioning unit which comprises a compressor, an electronic expansion valve, a first switch valve, a second switch valve, a condenser, an evaporator, a fluorine pump and a low-pressure circulation barrel. One end of the compressor is communicated with one end of the condenser; the other end of the condenser is communicated with the low-pressure circulating barrel through an electronic expansion valve; the first switch valve is connected with the electronic expansion valve in parallel; the low-pressure circulating barrel is communicated with one end of the fluorine pump; the other end of the fluorine pump is communicated with one end of the evaporator; the other end of the evaporator is respectively communicated with one end of the condenser and one end of the second switch valve; and the other end of the second switch valve and the other end of the compressor are respectively communicated with the low-pressure circulating barrel. The low-pressure circulating barrel is used for replacing a liquid storage device and a gas-liquid separator, so that the conditions of compressor liquid impact and fluorine pump cavitation are avoided; in addition, the occupied space of devices can be reduced while safe and reliable operation of the refrigerating system is guaranteed, and the maintenance space can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a kind of multi-connection fluorine pump air conditioning unit. BACKGROUND

[0002] Fluorine pump air conditioning unit is widely used in data centers and other high energy consumption facilities, and its main advantages include simple structure, easy maintenance and high energy efficiency. However, there are some key technical problems in the design and operation of existing fluorine pump air conditioning units, which affect the safety and reliability of the system. In order to ensure the normal operation of the fluorine pump system and the compressor system, a liquid accumulator and a gas-liquid separator are usually required.

[0003] The main function of the liquid accumulator is to store enough liquid refrigerant to ensure that the fluorine pump has enough liquid supply during operation and to avoid cavitation. The main function of the gas-liquid separator is to separate the liquid refrigerant in the gas return pipe to prevent the liquid refrigerant from entering the compressor and to avoid liquid knock.

[0004] In the multi-terminal use environment, fluorine pump air conditioning units face greater design and installation challenges. In a multi-terminal system, multiple parallel evaporators are usually required, which results in a larger volume of gas-liquid separator required. Larger gas-liquid separators require more installation space, which poses higher requirements for structural design. In addition, larger gas-liquid separators not only increase the cost of equipment, but also may affect the economy of the entire system. SUMMARY

[0005] The utility model aims at the above-mentioned deficiencies in the prior art and provides a multi-connection fluorine pump air conditioning unit.

[0006] The utility model aims to achieve the following technical solutions: a multi-connection fluorine pump air conditioning unit, comprising a compressor, an electronic expansion valve, a first on-off valve, a second on-off valve, a condenser, an evaporator, a fluorine pump, and a low-pressure circulation barrel.

[0007] One end of the compressor is in communication with one end of the condenser. The other end of the condenser is in communication with the middle part of the low-pressure circulation barrel through the electronic expansion valve. The first on-off valve and the electronic expansion valve are arranged in parallel. The bottom of the low-pressure circulation barrel is in communication with one end of the fluorine pump. The other end of the fluorine pump is in communication with one end of the evaporator. The other end of the evaporator is in communication with one end of the condenser and one end of the second on-off valve, respectively. The other end of the second on-off valve and the other end of the compressor are in communication with the top of the low-pressure circulation barrel, respectively.

[0008] The utility model is further provided, the first on-off valve and the second on-off valve are both electric ball valves.

[0009] The utility model is further provided, a liquid level sensor is arranged in the low-pressure circulation barrel.

[0010] The utility model further sets up, one end between compressor and condenser is equipped with first check valve.

[0011] The utility model further sets up, the other end between evaporimeter and condenser is equipped with second check valve.

[0012] The utility model further sets up, be equipped with first fan at evaporimeter.

[0013] The utility model further sets up, be equipped with second fan at condenser.

[0014] The utility model further sets up, the number of evaporimeter is multiple;Multiple evaporimeter is in parallel connection arrangement.

[0015] The utility model has the advantages that the utility model replaces liquid accumulator and gas-liquid separator by using low-pressure circulating barrel, avoids the situation of compressor liquid strike and fluorine pump cavitation, can reduce device occupied space while guaranteeing safe and reliable operation of refrigeration system, and can increase maintenance space. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model is further described with the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained according to the following drawings without creative labor for ordinary skilled in the art.

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Wherein: 1, compressor;2, electronic expansion valve;31, first switch valve;32, second switch valve;4, condenser;41, second fan;5, evaporimeter;51, first fan;6, fluorine pump;7, low-pressure circulating barrel;71, liquid level sensor;81, first check valve;82, second check valve. DETAILED DESCRIPTION

[0019] The utility model is further described in connection with the following embodiments.

[0020] From Figure 1 It can be known that the multi-connected fluorine pump air conditioning unit described in the embodiment comprises a compressor 1, an electronic expansion valve 2, a first switch valve 31, a second switch valve 32, a condenser 4, an evaporimeter 5, a fluorine pump 6 and a low-pressure circulating barrel 7.

[0021] One end of the compressor 1 is communicated with one end of the condenser 4; the other end of the condenser 4 is communicated with the middle part of the low-pressure circulation barrel 7 through the electronic expansion valve 2; the first switch valve 31 is arranged in parallel with the electronic expansion valve 2; the bottom of the low-pressure circulation barrel 7 is communicated with one end of the fluorine pump 6; the other end of the fluorine pump 6 is communicated with one end of the evaporator 5; the other end of the evaporator 5 is respectively communicated with one end of the condenser 4 and one end of the second switch valve 32; the other end of the second switch valve 32 and the other end of the compressor 1 are respectively communicated with the top of the low-pressure circulation barrel 7.

[0022] Specifically, the multi-connected fluorine pump air conditioning unit in the embodiment has the refrigerant flow path of compressor 1-condenser 4-electronic expansion valve 2-low-pressure circulation barrel 7-fluorine pump 6-evaporator 5-second switch valve 32-low-pressure circulation barrel 7-compressor 1 when in the compression refrigeration mode; when in the compression refrigeration mode, the first switch valve 31 is closed, the second switch valve 32 is opened, the refrigerant enters the low-pressure circulation barrel 7 after throttling through the electronic expansion valve 2, the gaseous refrigerant in the low-pressure circulation barrel 7 can directly enter the compressor 1, the liquid refrigerant in the low-pressure circulation barrel 7 flows to the evaporator 5 to perform evaporation heat exchange through the power provided by the fluorine pump 6, and then all enters the low-pressure circulation barrel 7 through the second switch valve 32. In the low-pressure circulation barrel 7, the refrigerant liquid entrained in the wet saturated steam from the evaporator 5 is separated, the dry saturated steam is combined with the flash gas generated after throttling to enter the compressor 1; at this time, the low-pressure circulation barrel 7 also plays the role of the gas-liquid separator in the traditional refrigeration system, avoiding the liquid knock of the compressor 1.

[0023] When in the fluorine cooling refrigeration mode, the refrigerant flow path is fluorine pump 6-evaporator 5-condenser 4-first switch valve 31-low-pressure circulation barrel 7-fluorine pump 6; when in the fluorine cooling refrigeration mode, the first switch valve 31 is opened, the second switch valve 32 is closed, the refrigerant flows through the condenser 4 and then enters the low-pressure circulation barrel 7 through the first switch valve 31. The low-pressure circulation barrel 7 has a certain liquid storage volume and gas-liquid separation volume, in the normal use environment, the liquid refrigerant flows to the fluorine pump 6, the low-pressure refrigerant liquid flows to the evaporator 5 to perform evaporation heat exchange under the action of the fluorine pump 6, and then flows to the condenser 4; at this time, the low-pressure circulation barrel 7 plays the role of the liquid accumulator in the traditional refrigeration system, avoiding the cavitation of the fluorine pump 6.

[0024] The embodiment uses the low-pressure circulation barrel 7, the low-pressure circulation barrel 7 has a certain liquid storage volume and gas-liquid separation volume, can replace the liquid accumulator and the gas-liquid separator, and avoids the liquid knock of the compressor 1 and the cavitation of the fluorine pump 6; in addition, the low-pressure circulation barrel 7 and the fluorine pump 6 are both installed at the rear end of the electronic expansion valve 2, effectively playing the role of gas-liquid separation.

[0025] The embodiment can reduce the device space occupation while ensuring safe and reliable operation of the refrigeration system, and can increase the maintenance space by replacing the liquid reservoir and the gas-liquid separator with the low-pressure circulating barrel 7.

[0026] The first switch valve 31 and the second switch valve 32 are both electric ball valves, so that the first switch valve 31 and the second switch valve 32 have faster response speed and better sealing performance.

[0027] The low-pressure circulating barrel 7 is provided with a liquid level sensor 71. Specifically, when the compression refrigeration mode is performed, the refrigerant liquid in the low-pressure circulating barrel 7 is controlled by the liquid level sensor 71 and the electronic expansion valve 2, and when there is a certain liquid level, the refrigerant liquid in the low-pressure circulating barrel 7 enters the evaporator 5 for evaporation heat exchange under the power action of the fluorine pump 6.

[0028] The one end of the compressor 1 and one end of the condenser 4 are provided with the first one-way valve 81. The above arrangement can prevent the backflow of the refrigerant liquid.

[0029] The other end of the evaporator 5 and one end of the condenser 4 are provided with the second one-way valve 82. The above arrangement can prevent the backflow of the refrigerant liquid, and when the compression refrigeration mode is performed, the liquid refrigerant flows to the evaporator 5 for evaporation heat exchange under the power provided by the fluorine pump 6, and then the refrigerant enters the low-pressure circulating barrel 7 through the second switch valve 32 due to the pressure difference before and after the second one-way valve 82 when the compressor 1 operates.

[0030] The evaporator 5 is provided with the first fan 51. The above arrangement facilitates the delivery of the cold energy of the evaporator 5 to the indoor.

[0031] The condenser 4 is provided with the second fan 41. The above arrangement facilitates the output of the heat of the condenser 4 to the outdoor.

[0032] The number of the evaporators 5 is multiple, and the multiple evaporators 5 are connected in parallel. The above arrangement can be applied to the use environment of multiple terminals.

[0033] It should be explained finally that the above embodiment is only used to illustrate the technical scheme of the utility model, and is not the limit of the protection scope of the utility model, although the utility model is explained in detail with reference to the preferred embodiment, the ordinary skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently, and does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. A multiple connected fluorine pump air conditioning unit, characterized by: Compressor (1), electronic expansion valve (2), first switch valve (31), second switch valve (32), condenser (4), evaporator (5), fluorine pump (6) and low pressure circulating barrel (7) are included. One end of the compressor (1) is communicated with one end of the condenser (4); the other end of the condenser (4) is communicated with the middle part of the low pressure circulating barrel (7) through the electronic expansion valve (2); the first switch valve (31) is arranged in parallel with the electronic expansion valve (2); the bottom of the low pressure circulating barrel (7) is communicated with one end of the fluorine pump (6); the other end of the fluorine pump (6) is communicated with one end of the evaporator (5); the other end of the evaporator (5) is communicated with one end of the condenser (4) and one end of the second switch valve (32) respectively; the other end of the second switch valve (32) and the other end of the compressor (1) are communicated with the top of the low pressure circulating barrel (7) respectively.

2. The multiple-circuit fluorine pump air conditioning unit according to claim 1, characterized in that: The first switch valve (31) and the second switch valve (32) are both electric ball valves.

3. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: The low pressure circulating barrel (7) is provided with a liquid level sensor (71) therein.

4. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: A first one-way valve (81) is arranged between one end of the compressor (1) and one end of the condenser (4).

5. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: A second one-way valve (82) is arranged between the other end of the evaporator (5) and one end of the condenser (4).

6. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: A first fan (51) is arranged at the evaporator (5).

7. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: A second fan (41) is arranged at the condenser (4).

8. The multiple-circuit fluorine pump air conditioning unit according to claim 1, wherein: The number of the evaporators (5) is multiple; the multiple evaporators (5) are arranged in parallel.

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