CN116171021A - Refrigerating system and working method thereof - Google Patents

Abstract

The invention provides a refrigerating system and a working method of the refrigerating system, and relates to the technical field of refrigeration. The refrigerating system comprises a cooling supplementing unit and a fluorine pump unit; the cooling supplementing unit comprises a first loop and a compressor, and the compressor is arranged in the first loop; the fluorine pump unit comprises a first branch, a second loop, a first heat exchanger and a fluorine pump, wherein the first heat exchanger is arranged on the first branch, and the first branch can exchange heat with the first loop through the first heat exchanger; the fluorine pump is arranged in the second loop, and the second loop is connected with the first branch in series; two ends of the second branch are respectively connected with the second loop, and the second branch is connected with the first branch in parallel; one of the first and second branches is open and the other is closed.

Description

Refrigerating system and working method thereof

Technical Field

The present disclosure relates to the field of refrigeration technologies, and in particular, to a refrigeration system and a working method of the refrigeration system.

Background

At present, a data center liquid cooling scheme generally adopts a cooling tower or a dry cooler to perform natural cooling, the cooling tower uses the air wet bulb temperature to cool, and the heat dissipation capacity is strong, however, some sites of the data center cannot provide water sources, and water enters the indoor of the data center, so that potential safety hazards caused by water leakage exist; the dry cooler utilizes the dry bulb temperature of air to cool, and under the condition that the outdoor environment temperature is higher in summer, the heat dissipation is severe, and the liquid pool temperature of the indoor liquid cooling cabinet is easy to be overhigh.

Based on the scheme, the air-cooled fluorine pump scheme begins to appear, and the principle is that a compressor and a fluorine pump are connected in series in the same system, when the compressor works, the fluorine pump is short-circuited through a one-way valve connected with the fluorine pump in parallel, and then the fluorine pump does not work; when the fluorine pump is in operation, the compressor is shorted out by another check valve in parallel with the compressor, at which time the compressor is not in operation. Because the air-cooled fluorine pump scheme needs to be switched between the compressor and the fluorine pump, and the liquid refrigerant enters the compressor to cause the compressor to be easily damaged, the gas refrigerant cannot work when entering the fluorine pump, and in order to ensure that the fluorine pump and the compressor can normally operate, various components are required to be arranged and are matched with a complex control scheme so as to ensure that the inlet of the compressor is the gas refrigerant, and the inlet of the fluorine pump is the hydraulic refrigerant. In this case, the whole refrigeration system has a large number of components, and the control step is inconvenient.

Disclosure of Invention

In view of the foregoing, the present application provides a refrigeration system to solve the problem that the existing refrigeration system is relatively inconvenient to control.

According to an aspect of the present application, there is provided a refrigeration system including a cool-supplementing unit, a fluorine pump unit, and a cabinet unit;

the cooling supplementing unit comprises a first loop and a compressor, and the compressor is arranged in the first loop;

the fluorine pump unit comprises a first branch, a second loop, a first heat exchanger and a fluorine pump, wherein the first heat exchanger is arranged on the first branch, and the first branch can exchange heat with the first loop through the first heat exchanger;

the fluorine pump is arranged in the second loop, the second loop is connected in series with the first branch, and the fluorine pump unit can exchange heat with the cabinet unit; two ends of the second branch are respectively connected with the second loop, and the second branch is connected with the first branch in parallel;

one of the first and second branches is open and the other is closed.

Preferably, the fluorine pump unit includes a first valve and a second valve, the first valve is disposed in the first branch, the first valve is capable of opening or closing the first branch, the first valve is disposed on an upstream side of the first heat exchanger, the second valve is disposed in the second branch, and the second valve is capable of opening or closing the second branch.

Preferably, the fluorine pump unit further includes a third branch and a first condenser, the first condenser is disposed in the second circuit, the first condenser is located at a downstream side of the first branch, one end of the third branch is connected to the first branch, the other end of the third branch is connected to the second circuit, and the third branch is connected in parallel to both the first valve and the first condenser;

the third branch is provided with a third valve, and the third valve can open or close the third branch.

Preferably, the refrigeration system comprises a plurality of fluorine pump units, wherein each of the plurality of first heat exchangers included in the plurality of fluorine pump units can exchange heat with the first loop, and the plurality of first heat exchangers included in the plurality of fluorine pump units are connected in parallel.

Preferably, the fluorine pump unit further comprises a second heat exchanger, and the second heat exchanger is arranged in the second loop;

the cabinet unit comprises a liquid pool and a third loop, the third loop is connected with the liquid pool in series, and the third loop exchanges heat with the first loop through the second heat exchanger.

According to another aspect of the application, a working method of a refrigeration system is provided, the working method of the refrigeration system depends on the refrigeration system, and the refrigeration system comprises a cold supplementing unit and a fluorine pump unit; the cooling supplementing unit comprises a first loop and a compressor, and the compressor is arranged in the first loop; the fluorine pump unit comprises a first branch, a second branch, a third branch, a second loop, a first heat exchanger, a fluorine pump, a first valve and a first condenser, wherein the first heat exchanger and the first valve are both arranged on the first branch, and the first branch can exchange heat with the first loop through the first heat exchanger; the fluorine pump is arranged in the second loop, and the second loop is connected with the first branch in series; two ends of the second branch are respectively connected with the second loop, and the second branch is connected with the first branch in parallel; the first condenser is arranged in the second loop, the first condenser is positioned at the downstream side of the first branch, one end of the third branch is connected with the first branch, the other end of the third branch is connected with the second loop, and the third branch is connected with the first valve and the first condenser in parallel;

the working method of the refrigerating system comprises the following steps:

a first detection step; detecting the temperature of a refrigerant at the inlet of the first condenser to obtain the inlet temperature;

a second judging step; judging whether the inlet temperature is higher than a preset temperature, and controlling whether the first branch and the second branch exchange heat through the first branch based on a judging result.

Preferably, based on the determination result, controlling whether the first branch and the second branch exchange heat through the first branch includes:

when the inlet temperature is less than or equal to the preset temperature, the first branch and the first loop do not exchange heat through the first heat exchanger, the first condenser and the fluorine pump work, and the first detection step is executed;

and when the inlet temperature is higher than the preset temperature, the first branch and the first loop exchange heat through the first heat exchanger.

Preferably, when the inlet temperature is greater than the preset temperature, the working method of the refrigeration system further comprises:

a second detection step of detecting the temperature of the environment in which the refrigeration system is positioned to obtain the environment temperature;

a second judging step of judging whether the ambient temperature is greater than the preset temperature, and when the ambient temperature is greater than the preset temperature, stopping the operation of the first condenser and the operation of the compressor; and when the ambient temperature is less than or equal to the preset temperature, the first condenser and the compressor work.

Preferably, the working method of the refrigeration system further comprises:

a third detection step; detecting the temperature of a refrigerant at the inlet of the first condenser to obtain the inlet temperature;

a third judging step; judging whether the inlet temperature is greater than a comparison temperature or not, and controlling whether the compressor is operated or not based on a judging result and the operation condition of the compressor, wherein the comparison temperature is a difference value between the preset temperature and the set temperature.

Preferably, based on the determination result and the operation condition of the compressor, controlling whether the compressor is operated includes:

when the inlet temperature is less than or equal to the comparison temperature and the compressor is at a minimum rotational speed, the compressor is shut down, and the refrigeration system performs the first detecting step;

the refrigeration system performs the third detecting step when the inlet temperature is greater than the comparison temperature or the compressor is not operating at a minimum rotational speed.

When the fluorine pump works, the first branch is closed, the second branch is opened, and at the moment, the liquid refrigerant flows through the second branch, the fluorine pump and the second loop, and the liquid refrigerant cannot pass through the first loop where the compressor is located.

When the compressor works, the first branch is opened, the second branch is closed, the refrigerant in the first loop exchanges heat with the first branch at the first heat exchanger, the gaseous refrigerant in the first loop does not enter the second loop where the fluorine pump is located, and the gaseous refrigerant does not pass through the fluorine pump.

Because compressor and fluorine pump are located second return circuit and first return circuit respectively, at the fluorine pump during operation, liquid refrigerant can not pass through the compressor, at the compressor during operation, gaseous refrigerant can not pass through the fluorine pump, guaranteed that the entrance of compressor is gaseous refrigerant, the entry of fluorine pump is hydraulic pressure refrigerant to the refrigerating system of this application need not to set up a plurality of parts, when carrying out fluorine pump and compressor switching, only need switch between first branch road and second branch road, has simplified refrigerating system's control step.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic configuration of a refrigeration system according to a first embodiment;

FIG. 2 shows a schematic diagram of the refrigeration system of the first embodiment in a first mode;

FIG. 3 shows a schematic diagram of the refrigeration system of the first embodiment in a second mode;

fig. 4 shows a schematic diagram of the refrigeration system of the first embodiment in a third mode;

fig. 5 shows a structural diagram of a refrigeration system of a second embodiment;

fig. 6 shows a logical schematic of a method of operation of the refrigeration system.

Icon: 1-a cooling supplementing unit; 11-a compressor; 12-a second condenser; 13-a throttling element; 14-a first loop; a 2-fluorine pump unit; 211-a first valve; 212-a second valve; 213-third valve; 221-a first heat exchanger; 222-a second heat exchanger; a 23-fluorine pump; 241-first leg; 242-a second leg; 243-third leg; 25-a second loop; 261-first connection valve; 262-a second connecting valve; 27-drying the filter; 28-a liquid storage tank; 29-a first condenser; 3-a cabinet unit; 31-a third loop; 32-a coolant pump; 33-liquid pool.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the present disclosure. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but rather, obvious variations may be made upon an understanding of the present disclosure, other than operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided solely to illustrate some of the many possible ways of implementing the methods, devices, and/or systems described herein that will be apparent after a review of the disclosure of the present application.

In the entire specification, when an element (such as a layer, region or substrate) is described as being "on", "connected to", "bonded to", "over" or "covering" another element, it may be directly "on", "connected to", "bonded to", "over" or "covering" another element or there may be one or more other elements interposed therebetween. In contrast, when an element is referred to as being "directly on," directly connected to, "or" directly coupled to, "another element, directly on," or "directly covering" the other element, there may be no other element intervening therebetween.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in examples described herein could also be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to another element would then be oriented "below" or "lower" relative to the other element. Thus, the term "above … …" includes both orientations "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent after an understanding of the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure.

An aspect of the present application provides a refrigeration system, as shown in fig. 1, including a cool supplementing unit 1, a fluorine pump unit 2, and a cabinet unit 3; the cooling unit 1 comprises a first loop 14 and a compressor 11, wherein the compressor 11 is arranged on the first loop 14; the fluorine pump unit 2 includes a first branch 241, a second branch 242, a second circuit 25, a first heat exchanger 221, and a fluorine pump 23, the first heat exchanger 221 is disposed on the first branch 241, and the first branch 241 can exchange heat with the first circuit 14 through the first heat exchanger 221; the fluorine pump 23 is arranged in the second loop 25, the second loop 25 is connected in series with the first branch 241, and the fluorine pump unit 2 can exchange heat with the cabinet unit 3; both ends of the second branch 242 are respectively connected with the second loop 25, and the second branch 242 is connected with the first branch 241 in parallel; one of the first branch 241 and the second branch 242 is open, and the other is closed.

When the fluorine pump unit 2 works and the cooling unit 1 does not work, the first branch 241 is closed, the second branch 242 is opened, and at the moment, the liquid refrigerant flows through the second branch 242, the fluorine pump 23 and the second loop 25, the fluorine pump unit 2 can exchange heat with the cabinet unit 3 to realize heat dissipation of the server, and in the process, the liquid refrigerant does not pass through the first loop 14 where the compressor 11 is located.

When the cooling unit 1 works and the fluorine pump unit 2 does not work, the first branch 241 is opened, the second branch 242 is closed, the refrigerant in the fluorine pump unit 2 can exchange heat with the refrigerant in the first loop 14 at the first heat exchanger 221 and then pass through the fluorine pump 23, the fluorine pump unit 2 can exchange heat with the cabinet unit 3 so as to realize heat dissipation of the server, in the process, the gaseous refrigerant in the first loop 14 cannot enter the second loop 25 where the fluorine pump 23 is located, and the gaseous refrigerant cannot pass through the fluorine pump 23.

Because compressor 11 and fluorine pump 23 are located second return circuit 25 and first return circuit 14 respectively, at fluorine pump 23 during operation, liquid refrigerant can not pass through compressor 11, at compressor 11 during operation, gaseous refrigerant can not pass through fluorine pump 23, guaranteed that the entrance of compressor 11 is gaseous refrigerant, the entry of fluorine pump 23 is hydraulic pressure refrigerant, and the refrigerating system of this application need not to set up a plurality of parts, when carrying out fluorine pump unit 2 and cold unit 1 switch over, only need switch between first branch circuit 241 and second branch circuit 242, the control step of refrigerating system has been simplified.

The above-mentioned operation of the fluorine pump unit 2 means that the fluorine pump 23 and the first condenser 29 are both operated, the non-operation of the fluorine pump unit 2 means that the first condenser 29 is not operated, the fluorine pump 23 is operated, and at this time, the fluorine pump unit 2 cannot dissipate heat, and the fluorine pump unit 2 only serves as a medium for heat transfer.

In addition, the fluorine pump unit 2 and the cold supplementing unit 1 are independent systems and do not interfere with each other, so that the refrigerating system is more stable, and the structure is simpler and more reliable.

As shown in fig. 1, the refrigeration system includes a first valve 211 and a second valve 212, the first valve 211 and the second valve 212, the first valve 211 is disposed on the first branch 241, the first valve 211 can open or close the first branch 241, the second valve 212 is disposed on the second branch 242, the second valve 212 can open or close the second branch 242, and the first valve 211 is disposed on the upstream side of the first heat exchanger 221.

Further, as shown in fig. 1, the refrigeration system further includes a first condenser 29 (the first condenser 29 may include a dry cooler provided on the second circuit 25 and a fan provided on one side of the dry cooler and blowing air to the dry cooler), the first condenser 29 is provided on the second circuit 25, the first condenser 29 is located on an upstream side of the first branch 241, and an "upstream side" and a "downstream side" opposite to the "upstream side" described below are both determined in accordance with a flow direction of the refrigerant.

Further, the refrigeration system further includes a second heat exchanger 222, a dry filter 27, and a liquid storage tank 28, the second heat exchanger 222, the dry filter 27, and the liquid storage tank 28 are all disposed on the second circuit 25, the first condenser 29 is located on a downstream side of the second heat exchanger 222, the dry filter 27 is located between the second heat exchanger 222 and the fluorine pump 23, and the liquid storage tank 28 is disposed on an upstream side of the fluorine pump 23.

Optionally, the refrigeration system further comprises a first connecting valve 261 and a second connecting valve 262, both the first connecting valve 261 and the second connecting valve 262 being arranged on the second circuit 25, the first connecting valve 261 being located between the first condenser 29 and the second heat exchanger 222, the second connecting valve 262 being located between the drier-filter 27 and the second heat exchanger 222.

As shown in fig. 1, the cooling unit comprises a second condenser 12 and a throttling element 13, both the second condenser 12 and the throttling element 13 being arranged on the first circuit 14.

Further, the cabinet element comprises a third circuit 31, a coolant pump 32 and a liquid bath 33, the third circuit 31 is connected in series with the liquid bath 33, the coolant pump 32 is arranged on the third circuit 31, can power the circulation of the coolant in the third circuit 31 and the liquid bath 33, and the third circuit 31 can exchange heat with the second circuit 25 through the second heat exchanger 222.

Optionally, in the first embodiment of the present application, as shown in fig. 1, the refrigeration system includes one fluorine pump unit 2, in the second embodiment of the present application, as shown in fig. 5, the refrigeration system includes a plurality of fluorine pump units 2, and a plurality of first heat exchangers 221 included in the plurality of fluorine pump units 2 can exchange heat with the first circuit 14, and a plurality of first heat exchangers 221 included in the plurality of fluorine pump units 2 are connected in parallel, so that one cooling unit 1 is collocated with a plurality of fluorine pump units 2, which can save cost.

In this application, the refrigeration system can be switched between different modes by controlling the on/off of the first valve 211, the second valve 212 and the third valve 213, and in the case of the first embodiment, the refrigeration system is switched between three modes.

In the first mode, only the fluorine pump 23 is used for cooling, and at this time, as shown in fig. 2 (in which the dotted line portion is a portion through which no refrigerant flows), the first valve 211 and the third valve 213 are closed, the second valve 212 is opened, and thus, both the first branch 241 and the third branch 243 are closed, and the second branch 242 is opened. At this time, the refrigerant exchanged by the second heat exchanger 222 sequentially passes through the first condenser 29, the second branch 242 and the fluorine pump 23 to return to the second heat exchanger 222, so as to circulate the refrigerant in the second circuit 25. The refrigerant radiates heat when flowing through the first condenser 29 so as to cool the refrigerant, and the refrigerant in the second loop 25 exchanges heat with the cooling liquid in the third loop 31 through the second heat exchanger 222, so that cooling of the cooling liquid in the liquid pool 33 is realized, and cooling of the server arranged in the liquid pool 33 is facilitated.

In the second mode, both the fluorine pump 23 and the compressor 11 are operated, at which time the ambient temperature is relatively high, and the heat radiation capability of the fluorine pump 23 is lowered, and the cooling is performed by the operation of the compressor 11 of the cooling unit 1. As shown in fig. 3 (in which the dotted line portion is a portion through which no refrigerant flows), the second valve 212 and the third valve 213 are closed, the first valve 211 is opened, and the compressor 11 is opened. Thus, the third leg 243 and the second leg 242 are disconnected, and the first leg 241 is opened. At this time, the refrigerant exchanged by the second heat exchanger 222 sequentially passes through the first condenser 29, the first branch 241, the first heat exchanger 221 and the fluorine pump 23 to return to the second heat exchanger 222, so as to realize the circulation of the refrigerant in the second loop 25. The refrigerant passing through the second heat exchanger 222 is primarily cooled when passing through the first condenser 29, then flows to the first heat exchanger 221 through the first branch 241 and exchanges heat with the refrigerant passing through the forced refrigeration of the compressor 11 in the first circuit 14, so as to realize further cooling of the refrigerant passing through the first branch 241, and the refrigerant passing through the second heat exchanger 222 through the fluorine pump 23 flows to the third circuit 31 and exchanges heat with the third circuit 31, so that cooling of the cooling liquid in the liquid pool 33 is realized, and cooling of the server arranged in the liquid pool 33 is facilitated.

In the third mode, the ambient temperature is higher than the predetermined temperature (the predetermined temperature here is the expected temperature at the outlet of the first condenser 29, and can be obtained by back-pushing according to the expected temperature of the cooling liquid in the liquid bath 33), the heat dissipation effect cannot be achieved by the fluorine pump unit 2, and the cooling unit 1 is operated, and the fluorine pump unit 2 only serves as a medium for heat transfer. At this time, as shown in fig. 4, the dotted line portion is a portion through which no refrigerant flows, the first branch 241 and the second branch 242 are closed, and the third branch 243 is opened. At this time, the refrigerant exchanged by the second heat exchanger 222 flows through the third branch 243, the first branch 241, the first heat exchanger 221, and the fluorine pump 23 in sequence, and returns to the second heat exchanger 222. The refrigerant passing through the second heat exchanger 222 exchanges heat with the refrigerant passing through the compressor 11 forced refrigeration in the first loop 14 when passing through the second heat exchanger 222 so as to cool the refrigerant flowing through the first branch 241, and the cooled refrigerant flows to the second heat exchanger 222 through the fluorine pump 23 to exchange heat with the third loop 31 so as to cool the fluorine pump 23.

As described above, when the ambient temperature decreases, the fluorine-only pump unit 2 is used for cooling; when the ambient temperature is relatively high, the cooling supplementing unit 1 and the fluorine pump unit 2 are adopted to operate simultaneously; when the ambient temperature is higher than the preset temperature, the cooling unit 1 is adopted for cooling, so that the refrigerating system can be matched with different running modes according to different ambient temperatures, and the applicability of the refrigerating system is improved. Meanwhile, the compressor 11 is provided in the refrigeration system, but the system is used only in a high-temperature environment in summer, and the annual PUE (Power Usage Effectiveness) of the data center is reduced, so that the power use efficiency is reduced.

In addition, the refrigerant entering the cabinet unit 3 is nontoxic and harmless, and the refrigerant becomes gas when leaking, so that the safety of the server and personnel can be ensured. Meanwhile, the refrigerating system adopts the fluorine pump 23 refrigerant, the pipe diameter of the connecting pipe used by the refrigerating system is much smaller than that of the connecting pipe used by the water system, and the field installation engineering quantity and the cost are greatly reduced.

According to another aspect of the present application, a method of operating a refrigeration system is provided, as shown in fig. 6. The working method of the refrigerating system comprises the following steps:

a first detection step; detecting the temperature of a refrigerant at the inlet of the first condenser to obtain an inlet temperature Tc;

a first judging step; judging whether the inlet temperature Tc is greater than a preset temperature Tm, and controlling whether the first branch and the second branch exchange heat through the first branch based on a judging result.

Specifically, controlling whether the first leg and the second leg exchange heat through the first leg includes:

when the inlet temperature Tc is less than or equal to the preset temperature Tm, the first branch and the first loop do not exchange heat through the first heat exchanger, the first condenser and the fluorine pump work, and the detection step is executed; at this time, the second valve is opened, the first valve and the third valve 213 are closed, and the heat dissipation requirement can be satisfied only by the operation of the fluorine pump unit 2, and the cooling supplementing unit 1 does not operate.

And when the inlet temperature Tc is greater than the preset temperature Tm, the first branch and the first loop exchange heat through the first heat exchanger. At this time, the heat dissipation requirement cannot be satisfied only by the fluorine pump unit 2, and the cooling unit 1 is required to operate.

When the inlet temperature Tc is greater than the preset temperature Tm, the working method of the refrigeration system further comprises the following steps:

a second detection step of detecting the ambient temperature of the refrigerating system to obtain an ambient temperature T0;

and a second judging step of judging whether the ambient temperature T0 is greater than the preset temperature Tm, when the ambient temperature T0 is greater than the preset temperature Tm, stopping the operation of the first condenser, and operating the compressor, wherein at the moment, the temperature of the refrigerant at the inlet of the first condenser 29 is higher than the ambient temperature, the first condenser 29 of the fluorine pump unit 2 cannot radiate heat, the cooling supplementing unit 1 is adopted to radiate heat, and the fluorine pump unit 2 is used as a medium for heat transfer, namely the first condenser 29 does not operate, and the compressor 11 operates. When the ambient temperature T0 is less than or equal to the preset temperature Tm, both the first condenser and the compressor operate. At this time, the first condenser 29 of the fluorine pump unit 2 is capable of dissipating heat, and the heat dissipating capability thereof is insufficient to meet the heat dissipating requirement, and the cooling unit 1 needs to perform cooling compensation, and the cooling unit 1 exchanges heat with the fluorine pump unit 2 through the first heat exchanger 221 to perform cooling compensation on the fluorine pump unit 2.

Further, the working method of the refrigeration system further comprises the following steps:

a third detection step; detecting the temperature of the refrigerant at the inlet of the first condenser to obtain an inlet temperature Tc, and comparing the inlet temperature Tc with a comparison temperature Tb, wherein the comparison temperature Tb is the difference between the preset temperature Tm and the set temperature k, namely Tb=Tm-k.

In this step, as the compressor 11 is operated, the temperature at the inlet of the first condenser 29 is changed, the inlet temperature Tc obtained when the refrigerant of the fluorine pump unit 2 flows through the first condenser 29 is the temperature of the refrigerant at the inlet of the first condenser 29, and when the refrigerant of the fluorine pump unit 2 does not flow through the first condenser 29, the inlet temperature Tc can be understood as the temperature of the refrigerant after passing through the first heat exchanger 221. The set temperature k may be selected as needed, and for example, the set temperature k may be 1 ℃, 2 ℃, 5 ℃ or the like.

A third judging step; and judging whether the compressor runs at the lowest rotation speed, and controlling whether the inlet temperature Tc is smaller than or equal to the comparison temperature Tb.

When the inlet temperature Tc is less than or equal to the comparison temperature Tb and the compressor 11 is at the lowest rotational speed operation (i.e., the compressor 11 is at the lowest rotational speed), the compressor 11 is stopped, and the refrigeration system performs the first detecting step; when the inlet temperature Tc is less than or equal to the comparison temperature Tb and the compressor 11 is at the lowest rotational speed operation, the cooling unit 1 does not need to be operated, i.e., the compressor 11 stops operating.

The refrigeration system performs the third detection step when the inlet temperature Tc is greater than the comparison temperature Tb or the compressor 11 is not operating at the lowest rotational speed. At this time, only the operation of the fluorine pump unit 2 cannot meet the heat dissipation requirement, and the cooling unit 1 continues to operate, i.e. the compressor 11 continues to operate.

By the working method of the refrigerating system, the three modes of the refrigerating system can be switched, and the specific process is as follows:

firstly, the temperature of the refrigerant at the inlet of the first condenser 29 is detected to obtain an inlet temperature Tc, then a first judging step is executed, when the inlet temperature Tc is less than or equal to a preset temperature Tm, the first mode is switched to, at this time, the first valve 211 and the third valve 213 are closed, the second valve 212 is opened, the fluorine pump unit 2 is operated, the cooling unit 1 is operated, and the first branch 241 and the first loop 14 do not exchange heat through the first heat exchanger 221. In this mode, the heat dissipation capacity of the fluorine pump 23 can satisfy the heat dissipation requirement of the server in the liquid bath 33, and natural heat dissipation is extremely low.

Further, when the inlet temperature Tc is greater than the preset temperature Tm, the first branch 241 exchanges heat with the first circuit 14 through the first heat exchanger 221, and it is determined to execute the second mode or the third mode based on the further determination result.

Specifically, when the inlet temperature Tc is greater than the preset temperature Tm, a second detection step is performed to obtain an ambient temperature T0, then a second determination step is performed, and when the ambient temperature T0 is less than or equal to the preset temperature Tm, the ambient temperature is lower, the fluorine pump unit 2 still has a certain heat dissipation capacity, but the heat dissipation requirement of the server in the liquid pool 33 cannot be met only by the heat dissipation of the fluorine pump unit 2, at this time, the second valve 212 and the third valve 213 are closed, the first valve 211 is opened, the fluorine pump unit 2 and the cold compensating unit 1 are operated, that is, the first condenser 29 and the compressor 11 are operated, the refrigerant is primarily cooled when passing through the first condenser 29, and then the second heat exchanger 222 exchanges heat with the refrigerant in the first circuit 14 after the refrigerant forced to be cooled by the compressor 11, so as to further cool the refrigerant flowing through the first branch 241. While in the second mode the fluorine pump 23 reaches the rated speed, the compressor 11 can adjust its speed of operation according to the ambient temperature and refrigeration requirements. During operation of the refrigeration system in the second mode, a third detection step is performed to obtain an inlet temperature Tc, and if the inlet temperature Tc is less than or equal to the comparison temperature Tb and the compressor 11 is at the lowest rotational speed, the compressor 11 is shut down and the first detection step is performed back. If the refrigeration system satisfies one of the inlet temperature Tc being greater than the comparison temperature Tb or the compressor 11 not being in the lowest rotational speed operation, the refrigeration system continues to operate in the second mode and continues to perform the third detection step.

When the ambient temperature T0 is greater than the preset temperature Tm, the ambient temperature T0 is higher at this time, the fluorine pump unit 2 cannot dissipate heat through the first condenser 29, but instead the refrigerant can absorb heat in the air, at this time, the first branch 241 and the second branch 242 are closed, the third branch 243 is opened, so that the refrigeration system is switched to the third mode, at this time, the cooling unit 1 is operated, the fluorine pump unit 2 is not operated, and the fluorine pump unit 2 only serves as a medium for heat transfer. In the third mode, the first condenser 29 stops working, the compressor 11 works, and the refrigerant in the fluorine pump unit 2 exchanges heat with the refrigerant in the first circuit 14 forcedly cooled by the compressor 11 when passing through the second heat exchanger 222, so as to cool the refrigerant in the fluorine pump unit 2. While in the third mode the fluorine pump 23 reaches a maximum rotational speed and the compressor 11 is automatically controlled depending on the ambient temperature and the refrigeration demand. During the operation of the refrigeration system in the third mode, a third detection step is performed to obtain an inlet temperature Tc, and if the inlet temperature Tc is less than or equal to the comparison temperature Tb and the compressor 11 is at the lowest rotational speed, the compressor 11 is stopped and the first detection step is performed back. If the refrigeration system satisfies one of the inlet temperature Tc being greater than the comparison temperature Tb or the compressor 11 not being in the lowest rotational speed operation, the refrigeration system continues to operate in the third mode and continues to perform the third detection step.

By the working method of the refrigeration system, the three modes of the refrigeration system can be switched by controlling the opening and closing of the first valve 211, the second valve 212 and the third valve 213, and the control steps of the refrigeration system are simplified.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. A refrigeration system, characterized in that the refrigeration system comprises a cooling supplementing unit, a fluorine pump unit and a cabinet unit;

the cooling supplementing unit comprises a first loop and a compressor, and the compressor is arranged in the first loop;

the fluorine pump unit comprises a first branch, a second loop, a first heat exchanger and a fluorine pump, wherein the first heat exchanger is arranged on the first branch, and the first branch can exchange heat with the first loop through the first heat exchanger;

the fluorine pump is arranged in the second loop, the second loop is connected in series with the first branch, and the fluorine pump unit can exchange heat with the cabinet unit; two ends of the second branch are respectively connected with the second loop, and the second branch is connected with the first branch in parallel;

one of the first and second branches is open and the other is closed.

2. The refrigeration system of claim 1, wherein the fluorine pump unit comprises a first valve and a second valve, the first valve is disposed in the first branch, the first valve is capable of opening or closing the first branch, the first valve is disposed on an upstream side of the first heat exchanger, the second valve is disposed in the second branch, and the second valve is capable of opening or closing the second branch.

3. The refrigeration system of claim 2 wherein said fluorine pump unit further comprises a third leg and a first condenser, said first condenser being disposed in said second circuit, said first condenser being located on a downstream side of said first leg, one end of said third leg being connected to said first leg, the other end of said third leg being connected to said second circuit, said third leg being connected in parallel with both said first valve and said first condenser;

the third branch is provided with a third valve, and the third valve can open or close the third branch.

4. The refrigeration system of claim 1, wherein the refrigeration system comprises a plurality of fluorine pump units, each of the plurality of first heat exchangers included in the plurality of fluorine pump units being capable of exchanging heat with the first circuit, the plurality of first heat exchangers included in the plurality of fluorine pump units being connected in parallel.

5. The refrigeration system of any one of claims 1-4 wherein the fluorine pump unit further comprises a second heat exchanger disposed in the second circuit;

the cabinet unit comprises a liquid pool and a third loop, the third loop is connected with the liquid pool in series, and the third loop exchanges heat with the first loop through the second heat exchanger.

6. The working method of the refrigeration system is characterized by depending on the refrigeration system, wherein the refrigeration system comprises a cold supplementing unit and a fluorine pump unit; the cooling supplementing unit comprises a first loop and a compressor, and the compressor is arranged in the first loop; the fluorine pump unit comprises a first branch, a second branch, a third branch, a second loop, a first heat exchanger, a fluorine pump, a first valve and a first condenser, wherein the first heat exchanger and the first valve are both arranged on the first branch, and the first branch can exchange heat with the first loop through the first heat exchanger; the fluorine pump is arranged in the second loop, and the second loop is connected with the first branch in series; two ends of the second branch are respectively connected with the second loop, and the second branch is connected with the first branch in parallel; the first condenser is arranged in the second loop, the first condenser is positioned at the downstream side of the first branch, one end of the third branch is connected with the first branch, the other end of the third branch is connected with the second loop, and the third branch is connected with the first valve and the first condenser in parallel;

the working method of the refrigerating system comprises the following steps:

a first detection step; detecting the temperature of a refrigerant at the inlet of the first condenser to obtain the inlet temperature;

a second judging step; judging whether the inlet temperature is higher than a preset temperature, and controlling whether the first branch and the second branch exchange heat through the first branch based on a judging result.

7. The method of operation of a refrigeration system of claim 6, wherein controlling whether the first leg and the second leg exchange heat through the first leg based on the determination comprises:

when the inlet temperature is less than or equal to the preset temperature, the first branch and the first loop do not exchange heat through the first heat exchanger, the first condenser and the fluorine pump work, and the first detection step is executed;

and when the inlet temperature is higher than the preset temperature, the first branch and the first loop exchange heat through the first heat exchanger.

8. The method of operating a refrigeration system of claim 7, wherein when the inlet temperature is greater than the preset temperature, the method of operating a refrigeration system further comprises:

a second detection step of detecting the temperature of the environment in which the refrigeration system is positioned to obtain the environment temperature;

a second judging step of judging whether the ambient temperature is greater than the preset temperature, and when the ambient temperature is greater than the preset temperature, stopping the operation of the first condenser and the operation of the compressor; and when the ambient temperature is less than or equal to the preset temperature, the first condenser and the compressor work.

9. The method of operating a refrigeration system of claim 8, further comprising:

a third detection step; detecting the temperature of a refrigerant at the inlet of the first condenser to obtain the inlet temperature;

a third judging step; judging whether the inlet temperature is greater than a comparison temperature or not, and controlling whether the compressor is operated or not based on a judging result and the operation condition of the compressor, wherein the comparison temperature is a difference value between the preset temperature and the set temperature.

10. The method of operating a refrigeration system of claim 9, wherein controlling whether the compressor is operating based on the determination and the operating condition of the compressor comprises:

when the inlet temperature is less than or equal to the comparison temperature and the compressor is at a minimum rotational speed, the compressor is shut down, and the refrigeration system performs the first detecting step;

the refrigeration system performs the third detecting step when the inlet temperature is greater than the comparison temperature or the compressor is not operating at a minimum rotational speed.

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