Water-cooled fluorine pump double-circulation air conditioning unit

Abstract

The utility model relates to the technical field of air conditioners, in particular to a water-cooled fluorine pump double-circulation air conditioning unit which comprises a water cooling system, a first refrigerating system and a second refrigerating system. The first refrigerating system comprises a first heat exchanger, a first evaporator, a first compression assembly and a first fluorine cooling assembly; the second refrigerating system comprises a second heat exchanger, a second evaporator, a second compression assembly and a second fluorine cooling assembly; the first heat exchanger is provided with a first heat exchange channel; the second heat exchanger is provided with a second heat exchange channel; the water cooling system comprises a water inlet pipe, a water outlet pipe, a first proportional three-way valve and a second proportional three-way valve. According to the utility model, the compressor mode or the fluorine pump mode can be independently operated by the two systems, so that the cooling capacity adjusting range of the systems can be increased; in addition, by arranging the first proportional three-way valve and the second proportional three-way valve, respective water inlet flow can be independently adjusted, and respective condensing pressure or fluorine pump cooling capacity output proportion of the two systems can be controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a water -cooled fluorine pump double -cycle air conditioning unit. BACKGROUND

[0002] In the cooling system of data center, fluorine pump air conditioner is widely used because of its simple structure, convenient maintenance and other advantages. However, the existing fluorine pump air conditioning system has some obvious deficiencies in actual operation, and these problems limit its energy efficiency and reliability.

[0003] The existing fluorine pump air conditioner mostly adopts air cooling form, that is, outdoor air is blown through the condenser by a fan to dissipate heat. This design has poor heat exchange effect on the condensing side in high temperature and high humidity environment, resulting in high condensing temperature, increased working load of compressor, increased energy consumption and low overall energy efficiency.

[0004] The existing water-cooled fluorine pump air conditioning system mostly adopts series fluorine pump system. In the transition season (such as spring and autumn), the environmental temperature is moderate, and theoretically natural cold source can be fully utilized for refrigeration. However, in actual operation, the compressor and fluorine pump are often started at the same time, the fluorine pump has little effect, and the refrigeration mainly depends on the compressor, resulting in high energy consumption.

[0005] In addition, when the double system runs, the condensing pressure cannot be independently controlled, which limits the flexibility and energy efficiency of the system. The control of condensing pressure directly affects the refrigeration effect and energy consumption of the system, and the independent control will lead to low running efficiency of the system under certain working conditions. INVENTION CONTENTS

[0006] The utility model aims at the above-mentioned deficiencies in the prior art, and provides a water-cooled fluorine pump double-cycle air conditioning unit.

[0007] The utility model aims at the above-mentioned deficiencies in the prior art, and provides a water-cooled fluorine pump double-cycle air conditioning unit.

[0008] The first refrigeration system comprises a first heat exchanger, a first evaporator, a first compression assembly arranged between one end of the first heat exchanger and one end of the first evaporator, and a first fluorine cooling assembly arranged between the other end of the first heat exchanger and the other end of the first evaporator.

[0009] The second refrigeration system comprises a second heat exchanger, a second evaporator, a second compression assembly arranged between one end of the second heat exchanger and one end of the second evaporator, and a second fluorine cooling assembly arranged between the other end of the second heat exchanger and the other end of the second evaporator.

[0010] The first heat exchanger is provided with a first heat exchange channel; the second heat exchanger is provided with a second heat exchange channel; the water cooling system comprises a water inlet pipe, a water outlet pipe, a first proportional three-way valve and a second proportional three-way valve; the first heat exchange channel, the water inlet pipe and the water outlet pipe are communicated through the first proportional three-way valve; the second heat exchange channel, the water inlet pipe and the water outlet pipe are communicated through the second proportional three-way valve.

[0011] The utility model further sets up, the water inlet of first proportional three -way valve and water inlet pipe intercommunication, one water outlet of first proportional three -way valve and one end of first heat exchange channel intercommunication, another water outlet of first proportional three -way valve respectively with water outlet pipe and another end of first heat exchange channel intercommunication,

[0012] The water inlet of second proportional three -way valve and water inlet pipe intercommunication, one water outlet of second proportional three -way valve and one end of second heat exchange channel intercommunication, another water outlet of second proportional three -way valve respectively with water outlet pipe and another end of second heat exchange channel intercommunication.

[0013] The utility model further sets up, the water cooling system still includes cooling tower and water pump, one end of cooling tower passes through water pump and water inlet pipe intercommunication, another end of cooling tower and water outlet pipe intercommunication.

[0014] The utility model further sets up, first heat exchanger and second heat exchanger are all plate type heat exchanger, first heat exchanger is provided with first refrigerant channel, second heat exchanger is provided with second refrigerant channel,

[0015] The first compression assembly is arranged between one end of the first refrigerant channel and one end of the first evaporator, and the first fluorine cooling assembly is arranged between the other end of the first refrigerant channel and the other end of the first evaporator.

[0016] The second compression assembly is arranged between one end of the second refrigerant channel and one end of the second evaporator, and the second fluorine cooling assembly is arranged between the other end of the second refrigerant channel and the other end of the second evaporator.

[0017] The utility model further sets up, first compression assembly includes parallelly connected first compressor and first compression check valve, first fluorine cooling assembly includes parallelly connected first fluorine pump and first fluorine cooling check valve, second compression assembly includes parallelly connected second compressor and second compression check valve, and second fluorine cooling assembly includes parallelly connected second fluorine pump and second fluorine cooling check valve.

[0018] One end of the first refrigerant channel is communicated with the other end of the first refrigerant channel in sequence through the first compressor, the first evaporator and the first fluorine pump.

[0019] One end of the second refrigerant passage is communicated with the other end of the second refrigerant passage after passing through a second compressor, a second evaporator and a second fluorine pump in sequence.

[0020] The utility model further sets up, be equipped with first electronic expansion valve between first evaporator and first fluorine pump, be equipped with second electronic expansion valve between second evaporator and second fluorine pump.

[0021] The utility model further sets up, be equipped with first liquid storage tank between first fluorine pump and the other end of first refrigerant passage, be equipped with second liquid storage tank between second fluorine pump and the other end of second refrigerant passage.

[0022] The utility model further sets up, first evaporator and second evaporator overlap setting.

[0023] The utility model further sets up, be equipped with fan at first evaporator and second evaporator.

[0024] The utility model discloses beneficial effects: the utility model discloses two systems can be independently operated compressor mode or fluorine pump mode, thereby can increase the cold quantity regulation range of system, and in addition, through setting first proportional three-way valve and second proportional three-way valve, can individually adjust the water inflow of each other, controls the condensing pressure or fluorine pump cold quantity output proportion of two systems. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model is further explained by the drawings, but the embodiment in the drawing does not constitute any limit to the utility model, and other drawings can be obtained according to the following drawings without the premise of creative labor for ordinary skilled person in the art.

[0026] Figure 1 It is the structure schematic diagram of the utility model;

[0027] Wherein: 1, first heat exchanger;11, first heat exchange passage;12, first refrigerant passage;2, first evaporator;31, first compressor;32, first compression check valve;33, first electronic expansion valve;41, first fluorine pump;42, first fluorine cold check valve;43, first liquid storage tank;5, second heat exchanger;51, second heat exchange passage;52, second refrigerant passage;6, second evaporator;61, fan;71, second compressor;72, second compression check valve;73, second electronic expansion valve;81, second fluorine pump;82, second fluorine cold check valve;83, second liquid storage tank;9, cooling tower;91, water pump;92, water inlet pipe;93, water outlet pipe;94, first proportional three-way valve;95, second proportional three-way valve. DETAILED DESCRIPTION

[0028] The utility model is further described in combination with the following embodiments.

[0029] By Figure 1 It can be known that the water-cooled fluorine pump double-circulation air conditioning unit comprises a water-cooling system, a first refrigeration system and a second refrigeration system.

[0030] The first refrigeration system comprises a first heat exchanger 1, a first evaporator 2, a first compression assembly arranged between one end of the first heat exchanger 1 and one end of the first evaporator 2, and a first fluorine cooling assembly arranged between the other end of the first heat exchanger 1 and the other end of the first evaporator 2.

[0031] The second refrigeration system comprises a second heat exchanger 5, a second evaporator 6, a second compression assembly arranged between one end of the second heat exchanger 5 and one end of the second evaporator 6, and a second fluorine cooling assembly arranged between the other end of the second heat exchanger 5 and the other end of the second evaporator 6.

[0032] The first heat exchanger 1 is provided with a first heat exchange channel 11; the second heat exchanger 5 is provided with a second heat exchange channel 51; the water-cooling system comprises a water inlet pipe 92, a water outlet pipe 93, a first proportional three-way valve 94 and a second proportional three-way valve 95; the first heat exchange channel 11, the water inlet pipe 92 and the water outlet pipe 93 are communicated through the first proportional three-way valve 94; the second heat exchange channel 51, the water inlet pipe 92 and the water outlet pipe 93 are communicated through the second proportional three-way valve 95.

[0033] Specifically, the water-cooled fluorine pump double-circulation air conditioning unit comprises a first refrigeration system and a second refrigeration system, and adopts a double-system arrangement mode, so that when one system has a problem, the other system can still run, thereby increasing the overall operation stability of the refrigeration system; the two refrigeration systems are both provided with compression assemblies and fluorine cooling assemblies, and the two systems can both independently run in a compressor mode or a fluorine pump mode, so that the cold capacity adjustment range of the system can be increased, one system can run in a compressor mode and the other system can run in a fluorine pump mode in a transition season, independent adjustment can be realized, and the fluorine pump energy-saving adjustment can be entered earlier; in addition, the first proportional three-way valve 94 and the second proportional three-way valve 95 are arranged, so that the water inflow of each system can be independently adjusted, and the condensing pressure or the fluorine pump cold capacity output proportion of each system can be controlled.

[0034] The water-cooled fluorine pump double-circulation air conditioning unit comprises a first proportional three-way valve 94, a water inlet pipe 92, a first heat exchange channel 11 and a second heat exchange channel 51; the water inlet end of the first proportional three-way valve 94 is communicated with the water inlet pipe 92; one water outlet end of the first proportional three-way valve 94 is communicated with one end of the first heat exchange channel 11; the other water outlet end of the first proportional three-way valve 94 is respectively communicated with the water outlet pipe 93 and the other end of the first heat exchange channel 11.

[0035] The water inlet end of the second proportional three-way valve 95 is communicated with the water inlet pipe 92; one water outlet end of the second proportional three-way valve 95 is communicated with one end of the second heat exchange channel 51; the other water outlet end of the second proportional three-way valve 95 is communicated with the water outlet pipe 93 and the other end of the second heat exchange channel 51 respectively.

[0036] Specifically, when one water outlet end of the first proportional three-way valve 94 is fully open and the other water outlet end is fully closed, the first heat exchange channel 11 of the first heat exchanger 1 can be completely bypassed, so that the heat exchange flow of the first heat exchanger 1 can be controlled.

[0037] Similarly, when one water outlet end of the second proportional three-way valve 95 is fully open and the other water outlet end is fully closed, the second heat exchange channel 51 of the second heat exchanger 5 can be completely bypassed, so that the heat exchange flow of the second heat exchanger 5 can be controlled.

[0038] The water-cooled fluorine pump double-circulation air conditioning unit disclosed in the embodiment further comprises a cooling tower 9 and a water pump 91; one end of the cooling tower 9 is communicated with the water inlet pipe 92 through the water pump 91; the other end of the cooling tower 9 is communicated with the water outlet pipe 93. Through the above arrangement, the cooling water circulates between the cooling tower 9, the water pump 91, the water inlet pipe 92, the first heat exchanger 1, the second heat exchanger 5 and the water outlet pipe 93.

[0039] The water-cooled fluorine pump double-circulation air conditioning unit disclosed in the embodiment comprises a first heat exchanger 1 and a second heat exchanger 5, both of which are plate heat exchangers; the first heat exchanger 1 is provided with a first refrigerant channel 12; the second heat exchanger 5 is provided with a second refrigerant channel 52.

[0040] The first compression assembly is arranged between one end of the first refrigerant channel 12 and one end of the first evaporator 2; the first fluorine cooling assembly is arranged between the other end of the first refrigerant channel 12 and the other end of the first evaporator 2.

[0041] The second compression assembly is arranged between one end of the second refrigerant channel 52 and one end of the second evaporator 6; the second fluorine cooling assembly is arranged between the other end of the second refrigerant channel 52 and the other end of the second evaporator 6.

[0042] The water-cooled fluorine pump double-circulation air conditioning unit disclosed in the embodiment comprises a first compression assembly, a first fluorine cooling assembly, a second compression assembly and a second fluorine cooling assembly; the first compression assembly comprises a first compressor 31 and a first compression check valve 32 arranged in parallel; the first fluorine cooling assembly comprises a first fluorine pump 41 and a first fluorine cooling check valve 42 arranged in parallel; the second compression assembly comprises a second compressor 71 and a second compression check valve 72 arranged in parallel; the second fluorine cooling assembly comprises a second fluorine pump 81 and a second fluorine cooling check valve 82 arranged in parallel.

[0043] One end of the first refrigerant passage 12 is communicated with the other end of the first refrigerant passage 12 after passing through the first compressor 31, the first evaporator 2 and the first fluorine pump 41 in sequence;

[0044] One end of the second refrigerant passage 52 is communicated with the other end of the second refrigerant passage 52 after passing through the second compressor 71, the second evaporator 6 and the second fluorine pump 81 in sequence.

[0045] Specifically, when the refrigeration system operates in the compressor mode, both the first refrigeration system and the second refrigeration system operate in the compressor mode, and the system cycles are respectively the first compressor 31-the first refrigerant passage 12-the first fluorine cooling one-way valve 42-the first evaporator 2-the first compressor 31, and the second compressor 71-the second refrigerant passage 52-the second fluorine cooling one-way valve 82-the second evaporator 6-the second compressor 71; in the compressor mode, the first proportional three-way valve 94 and the second proportional three-way valve 95 automatically adjust the water inflow of the cooling water according to the exhaust pressure of the first compressor 31 and the second compressor 71 respectively.

[0046] When the refrigeration system operates in the compressor and fluorine pump mixed mode, the first refrigeration system and the second refrigeration system operate in the fluorine pump mode and the compressor mode respectively, and the first refrigeration system cycle is the first fluorine pump 41-the first evaporator 2-the first compression one-way valve 32-the first refrigerant passage 12-the first fluorine pump 41; the second refrigeration system cycle is the second compressor 71-the second refrigerant passage 52-the second fluorine cooling one-way valve 82-the second evaporator 6-the second compressor 71. The first refrigeration system controls the water inflow of the cooling water by adjusting the opening of the first proportional three-way valve 94 according to the refrigeration demand, so as to control the cooling capacity of the fluorine pump system; the second refrigeration system adjusts the opening of the second proportional three-way valve 95 according to the exhaust pressure of the second compressor 71, so as to control the water inflow of the cooling water and adjust the exhaust pressure.

[0047] When the fluorine pump refrigeration system operates in the fluorine pump mode, both the first refrigeration system and the second refrigeration system operate in the fluorine pump mode, and the system cycles are respectively the first fluorine pump 41-the first evaporator 2-the first compression one-way valve 32-the first refrigerant passage 12-the first fluorine pump 41, and the second fluorine pump 81-the second evaporator 6-the second compression one-way valve 72-the second refrigerant passage 52-the second fluorine pump 81; in the fluorine pump mode, the water inflow of the cooling water is controlled by adjusting the opening of the first proportional three-way valve 94 and the second proportional three-way valve 95 according to the refrigeration demand, so as to control the cooling capacity of the fluorine pump system, for example, when the refrigeration demand increases, the first proportional three-way valve 94 and the second proportional three-way valve 95 are opened, the cooling water flow increases, the condensing pressure decreases, and the refrigerant flow in the system increases, so as to increase the refrigeration capacity of the system.

[0048] The water-cooled fluorine pump double-cycle air conditioning unit described in this embodiment is provided with a first electronic expansion valve 33 between the first evaporator 2 and the first fluorine pump 41; and a second electronic expansion valve 73 between the second evaporator 6 and the second fluorine pump 81. Through the above arrangement, the flow of refrigerant can be adjusted for the two refrigeration systems.

[0049] The water-cooled fluorine pump double-cycle air conditioning unit described in this embodiment is provided with a first liquid storage tank 43 between the first fluorine pump 41 and the other end of the first refrigerant passage 12; and a second liquid storage tank 83 between the second fluorine pump 81 and the other end of the second refrigerant passage 52. Through the above arrangement, the system pressure can be more stable, and the operation stability of the system can be improved.

[0050] The water-cooled fluorine pump double-cycle air conditioning unit described in this embodiment is provided with a first evaporator 2 and a second evaporator 6 arranged in an overlapping manner. The water-cooled fluorine pump double-cycle air conditioning unit described in this embodiment is provided with a fan 61 at the first evaporator 2 and the second evaporator 6. Through the above arrangement, the cold energy generated by the first evaporator 2 and the second evaporator 6 can be sent out.

[0051] Specifically, the control strategy described in this embodiment is as follows:

[0052] When the cooling water temperature is detected to be higher than the set value 23℃, the first refrigeration system and the second refrigeration system simultaneously operate in compressor mode, the first electronic expansion valve 33 and the second electronic expansion valve 73 are turned on, and the compressor is started to perform refrigeration after the electronic expansion valve reaches the initial opening degree.

[0053] By detecting the cooling water inlet temperature, when it is lower than the mixed mode entering set value 23℃, the first refrigeration system is switched from the compressor mode to the fluorine pump mode, the first compressor 31 stops after the first fluorine pump 41 of the first refrigeration system is started, and the second refrigeration system remains unchanged in the second compressor 71 refrigeration mode. At this time, the refrigeration capacity of the fluorine pump system is adjusted according to the refrigeration demand, the fluorine pump mode of the first refrigeration system is preferentially used for cooling, and the insufficient cooling capacity is adjusted by the compressor mode of the second refrigeration system.

[0054] When the cooling water inlet temperature is lower than the fluorine pump mode entering temperature set value 13℃, the two systems can be switched to the fluorine pump mode synchronously, and the two compressors stop working, and the fluorine pump refrigeration of the two systems can meet the refrigeration demand.

[0055] In the application of machine room, this water-cooled fluorine pump double-cycle air conditioning unit can be connected to the existing cooling tower 9, multiple air conditioning units can be placed outdoors, the cooling water pipe is connected to the existing cooling water circulation pipe, and the air conditioning system automatically adjusts the optimal energy-saving operation scheme by controlling the cooling water flow.

[0056] 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 water-cooled fluorine pump double-circulation air conditioning unit, characterized in that: The water cooling system, the first refrigeration system and the second refrigeration system are included; The first refrigeration system includes a first heat exchanger (1), a first evaporator (2), a first compression assembly arranged between one end of the first heat exchanger (1) and one end of the first evaporator (2), and a first fluorine cooling assembly arranged between the other end of the first heat exchanger (1) and the other end of the first evaporator (2); The second refrigeration system includes a second heat exchanger (5), a second evaporator (6), a second compression assembly arranged between one end of the second heat exchanger (5) and one end of the second evaporator (6), and a second fluorine cooling assembly arranged between the other end of the second heat exchanger (5) and the other end of the second evaporator (6); The first heat exchanger (1) is provided with a first heat exchange channel (11); the second heat exchanger (5) is provided with a second heat exchange channel (51); the water cooling system includes a water inlet pipe (92), a water outlet pipe (93), a first proportional three-way valve (94) and a second proportional three-way valve (95); the first heat exchange channel (11), the water inlet pipe (92) and the water outlet pipe (93) are communicated through the first proportional three-way valve (94); the second heat exchange channel (51), the water inlet pipe (92) and the water outlet pipe (93) are communicated through the second proportional three-way valve (95).

2. The water-cooled fluorine pump double-circulation air conditioning unit according to claim 1, characterized in that: The water inlet end of the first proportional three-way valve (94) is communicated with the water inlet pipe (92); one water outlet end of the first proportional three-way valve (94) is communicated with one end of the first heat exchange channel (11); the other water outlet end of the first proportional three-way valve (94) is respectively communicated with the water outlet pipe (93) and the other end of the first heat exchange channel (11); The water inlet end of the second proportional three-way valve (95) is communicated with the water inlet pipe (92); one water outlet end of the second proportional three-way valve (95) is communicated with one end of the second heat exchange channel (51); the other water outlet end of the second proportional three-way valve (95) is respectively communicated with the water outlet pipe (93) and the other end of the second heat exchange channel (51).

3. The water-cooled fluorine pump double-cycle air conditioning unit according to claim 1, characterized in that: The water cooling system further includes a cooling tower (9) and a water pump (91); one end of the cooling tower (9) is communicated with the water inlet pipe (92) through the water pump (91); the other end of the cooling tower (9) is communicated with the water outlet pipe (93).

4. The water-cooled fluorine pump double-circulation air conditioning unit according to claim 1, characterized in that: The first heat exchanger (1) is provided with a first refrigerant channel (12); the second heat exchanger (5) is provided with a second refrigerant channel (52); The first compression assembly is arranged between one end of the first refrigerant channel (12) and one end of the first evaporator (2); the first fluorine cooling assembly is arranged between the other end of the first refrigerant channel (12) and the other end of the first evaporator (2); The second compression assembly is arranged between one end of the second refrigerant channel (52) and one end of the second evaporator (6); the second fluorine cooling assembly is arranged between the other end of the second refrigerant channel (52) and the other end of the second evaporator (6).

5. A water-cooled fluorine pump double-cycle air conditioning unit according to claim 4, characterized in that: The first compression assembly comprises a first compressor (31) and a first compression check valve (32) arranged in parallel; the first fluorine cooling assembly comprises a first fluorine pump (41) and a first fluorine cooling check valve (42) arranged in parallel; the second compression assembly comprises a second compressor (71) and a second compression check valve (72) arranged in parallel; the second fluorine cooling assembly comprises a second fluorine pump (81) and a second fluorine cooling check valve (82) arranged in parallel; One end of the first refrigerant channel (12) is communicated with the other end of the first refrigerant channel (12) after sequentially passing through the first compressor (31), the first evaporator (2) and the first fluorine pump (41); One end of the second refrigerant channel (52) is communicated with the other end of the second refrigerant channel (52) after sequentially passing through the second compressor (71), the second evaporator (6) and the second fluorine pump (81).

6. A water-cooled fluorine pump double-circulation air conditioning unit according to claim 5, characterized in that: The first evaporator (2) and the first fluorine pump (41) are provided with a first electronic expansion valve (33); the second evaporator (6) and the second fluorine pump (81) are provided with a second electronic expansion valve (73).

7. A water-cooled fluorine pump double-cycle air conditioning unit according to claim 5, characterized in that: The first fluorine pump (41) and the other end of the first refrigerant channel (12) are provided with a first liquid storage tank (43); the second fluorine pump (81) and the other end of the second refrigerant channel (52) are provided with a second liquid storage tank (83).

8. A water-cooled fluorine pump double-cycle air conditioning unit according to claim 1, characterized in that: The first evaporator (2) and the second evaporator (6) are arranged in an overlapping manner.

9. A water-cooled fluorine pump double-cycle air conditioning unit according to claim 1, characterized in that: The first evaporator (2) and the second evaporator (6) are provided with a fan (61).

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