A multi-connected liquid cooling source

Abstract

The application relates to a multi-connected liquid cooling source, which comprises a compressor, a condenser, an evaporative heat exchange system and a gas-liquid separator connected in sequence through pipelines, the evaporative heat exchange system comprises multiple evaporative heat exchange branches connected in parallel, a first electromagnetic valve, a throttling device and an evaporator are arranged in sequence on each evaporative heat exchange branch along the flow direction of the heat exchange medium, the throttling device is an electronic expansion valve, a bypass circuit is arranged in parallel between the compressor outlet and the evaporator inlet, and a second electromagnetic valve is arranged on the bypass circuit. The application can meet the temperature control requirements of different loads.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration technology, in particular to a multi-connected liquid cooling source. BACKGROUND

[0002] The server center equipment layout is more and more compact, different equipment has different requirements for the liquid cooling source supply liquid temperature, at the same time, even if the same equipment under different working conditions, the liquid cooling source supply liquid temperature also has different requirements, in order to ensure that these equipment can work normally, the cooling source can provide a wide range of temperature automatic adjustment ability, at present, the compression refrigeration type cooling source corresponds to the single load working condition, when the load changes greatly, the cooling source cannot adapt to the corresponding load change. SUMMARY

[0003] In view of the problems in the prior art, the present application provides a multi-connected liquid cooling source which can meet the temperature control requirements of different loads.

[0004] The technical scheme adopted by the present application to solve the above technical problems is: a multi-connected liquid cooling source, comprising a compressor, a condenser, an evaporative heat exchange system and a gas-liquid separator connected in sequence through pipelines, the evaporative heat exchange system comprises a plurality of evaporative heat exchange branches connected in parallel, a first electromagnetic valve, a throttling device and an evaporator are arranged in sequence on each evaporative heat exchange branch along the flow direction of the heat exchange medium, a bypass circuit is arranged in parallel between the outlet of the compressor and the inlet of the evaporator, and a second electromagnetic valve is arranged on the bypass circuit.

[0005] In a possible implementation manner, a condensing pressure regulating valve, a first check valve, a liquid accumulator and a drying filter are arranged on the pipeline between the condenser and the evaporative heat exchange system.

[0006] In a possible implementation manner, a differential pressure branch is connected in parallel between the outlet of the compressor and the outlet of the condensing pressure regulating valve, and a differential pressure valve is arranged on the differential pressure branch.

[0007] In a possible implementation manner, the evaporative heat exchange branch is two.

[0008] In a possible implementation manner, a low-pressure switch is arranged at the inlet pipeline of the compressor, and a high-pressure switch is arranged at the outlet pipeline of the compressor.

[0009] In a possible implementation manner, a first temperature sensor is arranged at the outlet pipeline of the compressor, and a first pressure sensor is arranged at the inlet pipeline of the condenser.

[0010] In a possible implementation manner, the condenser is two and arranged in parallel.

[0011] In a possible implementation manner, a second temperature sensor and a second pressure sensor are arranged at the outlet pipeline of the evaporator.

[0012] In a possible implementation, the throttling device is an electronic expansion valve.

[0013] In a possible implementation, the heat exchange medium is freon R407C.

[0014] In a possible implementation, the water side input end of the evaporator is communicated with the water side output end through a cooling pipeline, and the cooling pipeline is provided with an automatic exhaust valve, a flow sensor, a liquid supply pump and a load.

[0015] In a possible implementation, two first ball valves are arranged on the cooling pipeline between the load and the liquid supply pump, a first filter is arranged on the cooling pipeline between the two first ball valves, shunt branches are connected in parallel at both ends of the two first ball valves, and a second ball valve and an expansion tank are arranged on the shunt branches.

[0016] In a possible implementation, a liquid supplementing circuit is further arranged in parallel between the liquid inlet and the liquid outlet of the liquid supply pump, and the liquid supplementing circuit is provided with a third electromagnetic valve, a liquid supplementing tank, a second filter, a liquid supplementing pump and a second check valve.

[0017] The application has the following beneficial effects: 1. Multiple evaporative heat exchange branches are arranged, and a second temperature sensor and a second pressure sensor are further arranged on the evaporative heat exchange branches. By controlling the opening and closing of the electronic expansion valves and the first electromagnetic valves on the evaporative heat exchange branches, the distribution of the refrigerating capacity of the compressor in multiple evaporators is realized, and the support of the heat exchange capacity required by different loads on different evaporative heat exchange branches is further realized.

[0018] 2. The boiling point of freon R407C is relatively low, and it is extremely easy to evaporate, which is more convenient for the circulation of the heat exchange process.

[0019] 3. By arranging a low-voltage switch and a high-voltage switch, when the suction pressure of the compressor is too low or the outlet pressure of the compressor is too high, the corresponding switch is actuated, and the compressor stops running to prevent system damage, thereby playing a protection role for the compressor.

[0020] 4. By arranging a drying filter, the heat exchange medium can be filtered, so that dirt is prevented from entering the evaporators on the evaporative heat exchange branches. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the application;

[0022] Figure 2 FIG. 2 is a structural schematic diagram of another embodiment of the application.

[0023] Marked in the figure: 1, compressor, 2, condenser, 201, condensing fan, 3, condensing pressure regulating valve, 4, first check valve, 5, liquid accumulator, 6, drying filter, 7, evaporative heat exchange branch, 701, first solenoid valve, 702, throttling device, 703, evaporator, 8, gas-liquid separator, 9, bypass circuit, 10, second solenoid valve, 11, low pressure switch, 12, high pressure switch, 13, differential pressure valve, 14, first temperature sensor, 15, first pressure sensor, 16, second temperature sensor, 17, second pressure sensor, 18, automatic exhaust valve, 19, flow sensor, 20, liquid supply pump, 21, first ball valve, 22, first filter, 23, second ball valve, 24, load, 25, third solenoid valve, 26, liquid supplement tank, 27, second filter, 28, liquid supplement pump, 29, expansion tank, 30, second check valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Please refer to Figure 1 The embodiment of the present application provides a multi-connected liquid cooling source, which comprises a compressor 1, a condenser 2, an evaporative heat exchange system and a gas-liquid separator 8 connected in sequence by pipelines, the evaporative heat exchange system comprises a plurality of evaporative heat exchange branches 7 connected in parallel, a first solenoid valve 701, a throttling device 702 and an evaporator 703 are arranged in sequence on each evaporative heat exchange branch 7 along the flow direction of the heat exchange medium, the heat exchange medium is freon R407C, the boiling point of freon R407C is relatively low, which is easy to evaporate and more convenient for the circulation of the heat exchange process, the throttling device 702 is an electronic expansion valve, the electronic expansion valve adopts PID control, the PID control is a prior art and will not be described here, a bypass circuit 9 is arranged in parallel between the outlet of the compressor 1 and the inlet of the evaporator 703, a second solenoid valve 10 is arranged on the bypass circuit 9, and the evaporator 703 is a plate heat exchanger.

[0026] The evaporative heat exchange branch 7 is two, the condenser 2 is two and is in parallel, and the condenser 2 further comprises a condenser fan 201, which discharges the heat load of the condenser 2 to the outside space.

[0027] Specifically, as shown in the figure, Figure 1 The condenser 2 and the evaporative heat exchange system are provided with a condensing pressure regulating valve 3, a first check valve 4, a liquid accumulator 5 and a drying filter 6 on the pipeline therebetween, the first check valve 4 is used to prevent backflow of the heat exchange medium, the liquid accumulator 5 is used to store the heat exchange medium flowing out of the outlet of the condenser 2, and the drying filter 6 can filter the heat exchange medium, thereby avoiding dirt from entering the evaporator 703 of the evaporative heat exchange branch 7.

[0028] More specifically, a differential pressure branch is in parallel between the outlet of the compressor 1 and the outlet of the condensing pressure regulating valve 3, the differential pressure branch is provided with a differential pressure valve 13, a low-pressure switch 11 is arranged at the inlet pipeline of the compressor 1, a high-pressure switch 12 is arranged at the outlet pipeline of the compressor 1, the low-pressure switch and the high-pressure switch are arranged to act when the suction pressure of the compressor is too low or the outlet pressure of the compressor is too high, so that the compressor stops running to prevent damage to the system, thereby protecting the compressor, a first temperature sensor 14 is arranged at the outlet pipeline of the compressor 1, a first pressure sensor 15 is arranged at the inlet pipeline of the condenser 2, the first temperature sensor 14 collects the discharge temperature of the compressor 1, the first pressure sensor 15 collects the pressure before the condenser 2, a second temperature sensor 16 and a second pressure sensor 17 are arranged at the outlet pipeline of the evaporator 703, the second temperature sensor 16 and the second pressure sensor 17 collect the temperature and the pressure after the evaporator 703, respectively.

[0029] In addition, as shown in the figure, Figure 1 The water side input end of the evaporator 703 is communicated with the water side output end through a cooling pipeline, one side of the cooling pipeline is defined as a primary side of the evaporator 703, and the other side of the evaporative heat exchange branch 7 is defined as a secondary side of the evaporator 703, the cooling pipeline is provided with an automatic exhaust valve 18, a flow sensor 19, a liquid supply pump 20 and a load 24, a plurality of third temperature sensors and a plurality of third pressure sensors are further arranged on the cooling pipeline, the automatic exhaust valve 18 is arranged to exhaust gas in the system, thereby avoiding problems such as oxidation corrosion, poor circulation, vortex emptying of the circulating pump, large noise of pipeline operation with gas, and the like, the load 24 described in the application refers to a load heating body or a heating component, two first ball valves 21 are arranged on the cooling pipeline between the load 24 and the liquid supply pump 20, a first filter 22 is arranged on the cooling pipeline between the two first ball valves 21, shunt branches are in parallel at both ends of the two first ball valves 21, a second ball valve 23 is arranged on the shunt branches, and drain ball valves are arranged at both ends of the load 24 on the cooling pipeline.

[0030] The working principle of the present application is described as follows: the low-pressure gaseous refrigerant is sucked into the compressor 1 inlet, the low-pressure gaseous refrigerant is compressed in the compressor 1, the temperature is raised, the high-temperature high-pressure gaseous refrigerant is formed into the high-pressure side of the circulating pipeline, the high-temperature high-pressure gaseous refrigerant discharged from the compressor 1 outlet is changed into high-temperature high-pressure liquid refrigerant after the condenser 2, but the temperature of the liquid refrigerant is lower than that of the high-temperature high-pressure gaseous refrigerant discharged from the compressor 1 outlet, then the high-temperature high-pressure liquid refrigerant passes through the condensing pressure regulating valve 3, the first check valve 4, the liquid accumulator 5 and the dry filter 6 and enters two evaporation heat exchange branches 7 respectively, then for each evaporation heat exchange branch 7, the high-temperature high-pressure liquid refrigerant enters the electronic expansion valve for throttling and is sprayed into the evaporator 703 (low-pressure side), the pressure is reduced, and the low-temperature low-pressure two-phase refrigerant (i.e. gaseous + liquid) is changed, at this time, the second electromagnetic valve 10 in each bypass circuit 9 is in the closed state, the cooling medium in the cooling pipeline returns to the liquid cooling source after absorbing heat in the load 24, the pressure is provided by the liquid supply pump 20, the heat exchange is carried out with the secondary side heat exchange medium through the heat exchanger, the cooled cooling medium enters the load 24 through the pipeline again, so as to circulate, thereby taking away the heat in the load 24, in this process, the load 24 is cooled, so as to ensure that the load 24 works in a good environment, the low-temperature low-pressure two-phase refrigerant is evaporated after absorbing the heat of the load 24 brought by the cooling medium in the evaporator 703, and is changed into low-temperature low-pressure gaseous refrigerant, then the gaseous refrigerant flows out from the evaporator 703 outlet and enters the gas-liquid separator 8, the gas-liquid separator 8 can recover the liquid refrigerant in the two-phase refrigerant in the evaporator 703 under the condition that the two-phase refrigerant is not completely evaporated, so as to ensure that the cooling medium entering the compressor 1 is gaseous, so as to protect the normal operation of the compressor 1, finally the low-pressure gaseous refrigerant flows out from the gas-liquid separator 8 and enters the compressor 1 for compression to become high-temperature high-pressure gaseous refrigerant again, so as to realize the circulating cooling of the load 24.

[0031] In addition to completing the above refrigeration system workflow, under the condition that the secondary side flow and the liquid return pressure remain unchanged, taking one of the evaporative heat exchange branches 7 as an example, when the evaporator 703 corresponding to the secondary side liquid supply temperature rises, the second temperature sensor 16 collects the temperature rise, the second pressure sensor collects the pressure rise, the electronic expansion valve opening degree increases, and the refrigerating capacity through the evaporator 703 side correspondingly increases, thereby meeting the load demand; when the evaporator 703 corresponding to the secondary side liquid supply temperature, the electronic expansion valve opening degree decreases, and the refrigerating capacity through the evaporator 703 side correspondingly decreases, thereby meeting the load requirement; when the liquid supply temperature is too low and the electronic expansion valve cannot realize temperature control, the corresponding second electromagnetic valve is opened, the secondary side liquid supply temperature is further controlled through the bypass circuit 9, and part of the high-temperature and high-pressure gas discharged by the compressor 1 is not condensed through the condenser 2 but directly sent to the inlet of the evaporator 703 and mixed with the low-temperature and low-pressure refrigerant throttled by the electronic expansion valve (equivalent to giving the evaporator 703 a heat load other than the actual load), for increasing the evaporation temperature and the return gas temperature, for real-time adjustment to stabilize the liquid supply temperature.

[0032] Similarly, one of the evaporators 703 on the other evaporative heat exchange branch 7 can realize temperature control through the above-mentioned mode, and the total refrigeration demand of the two evaporators 703 should be less than or equal to the maximum refrigeration capacity of the compression 1 refrigeration system. Under this constraint condition, the number of evaporators 703 can be multiple, that is, the evaporative heat exchange branches 7 are multiple, that is, multiple loads share the same cold source system to meet the temperature control requirements of different loads.

[0033] Of course, the present application is not limited to the above-mentioned embodiments, and the following provides several other embodiments based on the design concept of the present application.

[0034] For example, in embodiment 2, unlike the above-mentioned embodiments, one of the evaporators 703 is further provided with an expansion tank 29 on the cooling pipeline, and the expansion tank 29 is arranged on the shunt branch. The cooling pipeline (the front end of the suction port of the liquid supply pump 20) is provided with the expansion tank 39, which eliminates the pressure fluctuation and liquid expansion caused by the change of water temperature, avoids damaging other system control elements, and can also eliminate the pressure fluctuation caused by the opening and closing of the liquid supply pump 20, the water hammer effect caused by the opening and closing of other valves, and protects the entire system from the impact of water hammer. In addition, the liquid inlet and the liquid outlet of the liquid supply pump 20 on the cooling pipeline are further connected in parallel with a liquid supplementing circuit, the liquid supplementing circuit is provided with a third electromagnetic valve 25, a liquid supplementing tank 26, a second filter 27, a liquid supplementing pump 28 and a second check valve 30, the medium of the cooling pipeline is fluorinated liquid, the liquid supplementing tank 26 is further connected with a liquid discharge valve, and the liquid supplementing tank 26 is provided with a liquid level meter and a liquid level switch.

[0035] In the above embodiments, the heat exchange medium is R407C with low boiling point. In Embodiment 4, the heat exchange medium can also be acetone, isobutane, n-butane, fluorinated liquid, R22 refrigerant, etc.

[0036] In Embodiment 3, unlike the above-described embodiments, the multi-connected liquid cooling source further comprises a cabinet, and the condenser 2 is arranged outside the cabinet. The condenser 2 arranged outside the cabinet can reduce the pressure of limited installation space in the cabinet.

[0037] It should be noted that the above embodiments are only used to illustrate the present application, but the present application is not limited to the above embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application all fall within the protection scope of the present application.

Claims

1. A multi-union liquid cooling source, characterized by, The application relates to a refrigeration system, which comprises a compressor (1), a condenser (2), an evaporative heat exchange system and a gas-liquid separator (8) connected in sequence through pipelines, the evaporative heat exchange system comprises multiple evaporative heat exchange branches (7) connected in parallel, a first electromagnetic valve (701), a throttling device (702) and an evaporator (703) are sequentially arranged on each evaporative heat exchange branch (7) along the flow direction of the heat exchange medium, a bypass circuit (9) is arranged in parallel between the outlet of the compressor (1) and the inlet of the evaporator (703), the inlet of the bypass circuit (9) is connected to a connecting pipeline between the compressor (1) and the condenser (2), and a second electromagnetic valve (10) is arranged on the bypass circuit (9); the bypass circuit (9) is used for directly inputting part of high-temperature gas discharged by the compressor (1) into the inlet of the evaporator (703) to mix with the throttled refrigerant, so that the evaporating temperature and the back gas temperature are increased, and the supply liquid temperature is adjusted in real time to stabilize the supply liquid temperature.

2. The multi-connected liquid cooling source according to claim 1, characterized in that: A condensing pressure regulating valve (3), a first check valve (4), a liquid accumulator (5) and a drying filter (6) are arranged on the pipeline between the condenser (2) and the evaporative heat exchange system.

3. The multi-connected liquid cooling source according to claim 2, characterized in that: A differential pressure branch is arranged in parallel between the outlet of the compressor (1) and the outlet of the condensing pressure regulating valve (3), and a differential pressure valve (13) is arranged on the differential pressure branch.

4. The multi-connected liquid cooling source according to claim 2 or 3, characterized in that: The evaporative heat exchange branch (7) is two.

5. The multi-connected liquid cooling source according to claim 4, characterized in that: A low-pressure switch (11) is arranged at the inlet pipeline of the compressor (1), and a high-pressure switch (12) is arranged at the outlet pipeline of the compressor (1).

6. The multi-connected liquid cooling source according to claim 5, characterized in that: A first temperature sensor (14) is arranged at the outlet pipeline of the compressor (1), and a first pressure sensor (15) is arranged at the inlet pipeline of the condenser (2).

7. The multi-connected liquid cooling source according to claim 6, characterized in that: The condenser (2) is two and arranged in parallel.

8. The multi-connected liquid cooling source according to claim 7, characterized in that: A second temperature sensor (16) and a second pressure sensor (17) are arranged at the outlet pipeline of the evaporator (703).

9. The multi-connected liquid cooling source according to claim 8, characterized in that: The throttling device (702) is an electronic expansion valve.

10. The multi-connected liquid cooling source according to claim 9, characterized in that: The heat exchange medium is freon R407C.

11. The multi-union liquid cooling source according to claim 10, characterized in that: The water side input end of the evaporator (703) is communicated with the water side output end through a cooling pipeline, and an automatic exhaust valve (18), a flow sensor (19), a liquid supply pump (20) and a load (24) are arranged on the cooling pipeline.

12. The multi-split liquid cooling source according to claim 11, characterized in that: Two first ball valves (21) are arranged on the cooling pipeline between the load (24) and the liquid supply pump (20), a first filter (22) is arranged on the cooling pipeline between the two first ball valves (21), shunt branches are arranged in parallel at the two ends of the two first ball valves (21), a second ball valve (23) and an expansion tank (29) are arranged on the shunt branches.

13. The multi-union liquid cooling source according to claim 11, characterized in that: A liquid supplementing circuit is further arranged in parallel between the liquid inlet and the liquid outlet of the liquid supply pump (20), a third electromagnetic valve (25), a liquid supplementing tank (26), a second filter (27), a liquid supplementing pump (28) and a second check valve (30) are arranged on the liquid supplementing circuit.

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