WO2023056963A1

WO2023056963A1 - Hybrid cooling equipment, cooling system and control method therefor, and storage medium

Info

Publication number: WO2023056963A1
Application number: PCT/CN2022/124034
Authority: WO
Inventors: 宫新光
Original assignee: 航霈科技(深圳)有限公司
Priority date: 2021-10-09
Filing date: 2022-10-09
Publication date: 2023-04-13

Abstract

The present application relates to hybrid cooling equipment (30), a cooling system (10) and a control method therefor, and a storage medium. The hybrid cooling equipment (30) comprises a liquid inlet pipeline (31) having a first valve (311), a liquid return pipeline (32) having a second valve (321), a first pump unit (34), a second pump unit (35), and a liquid cooling machine (33). In a natural cooling state, when a first temperature value of a liquid outlet end of a cooling device (20) is greater than a first environment temperature of the current environment, the first valve and the second valve are opened, the first pump unit and the second pump unit are turned off, and a liquid at the liquid outlet end of the cooling device (20) is supplied to a liquid inlet of a heat dissipation unit (40) by means of the first valve (311), and is supplied to a liquid inlet end of the cooling device (20) by means of the liquid return pipeline (32) after heat dissipation by the heat dissipation unit (40). In a hybrid cooling state, the liquid cooling machine (33) is turned on, the first valve and the second valve are closed, the first pump unit and the second pump unit are turned on, the liquid at the liquid outlet end of the cooling device (20) is supplied to the liquid inlet of the heat dissipation unit (40) after passing through a condenser (333), and is supplied to an evaporator liquid inlet (335) after heat dissipation by the heat dissipation unit (40), and the liquid passing through an evaporator (331) is supplied to the liquid inlet end of the cooling device (20).

Description

Hybrid refrigeration device, refrigeration system and control method thereof, storage medium

technical field

The present application relates to the technical field of data center refrigeration, and more specifically, to a hybrid refrigeration device, a refrigeration system and a control method thereof, and a storage medium.

Background technique

At present, with the rapid development of data centers, the rapid growth of energy consumption has become a problem that cannot be ignored in the development of the data center industry. The full launch of the "East Counting West Computing" project puts forward higher requirements for energy saving and consumption reduction of data centers. From the perspective of market demand, how to reduce the energy consumption of the data center cooling system, increase the use time of natural cooling, and reduce the use time and power consumption of mechanical cooling have become prominent issues in data center energy saving and efficiency enhancement.

In some data center refrigeration systems of related technologies, such as refrigeration systems including free coolers and mechanical refrigeration, to enter the free cooling state, the outdoor ambient temperature needs to be low (eg, the outdoor ambient temperature must be below 12°C). In the case of high outdoor ambient temperature, it needs to run in a fully mechanical cooling state. For some areas where the outdoor temperature is high in most months, the running time of the fully mechanical cooling state is longer, and the electricity cost required for cooling is higher. For data center refrigeration systems of other related technologies, the power cost may be reduced, but the control and pipeline design are relatively complicated, and the system hardware cost and installation and transformation cost are high, so it is necessary to improve.

Contents of the invention

The present application provides a hybrid refrigeration device, a refrigeration system, a control method thereof, and a storage medium with low cost and relatively simple control and pipeline design.

The first aspect of the present application provides a hybrid refrigeration device, including a liquid inlet pipeline with a first valve body, a liquid return pipeline with a second valve body, a liquid-cooled refrigerator, a first pump unit, and a second pump unit, The inlet of the liquid inlet pipeline is used to connect to the liquid outlet of the refrigeration equipment, the outlet of the liquid inlet pipeline is used to connect to the liquid inlet of the cooling unit; the inlet of the liquid return pipeline is used to connect to the cooling unit The liquid outlet of the unit, the outlet of the liquid return line is used to connect the liquid inlet of the refrigeration equipment; the liquid-cooled refrigerator has an evaporator liquid outlet, an evaporator liquid inlet, and a condenser liquid outlet and the condenser liquid inlet, the condenser liquid inlet is connected to the inlet of the liquid inlet pipeline, and the condenser liquid outlet is used to connect the outlet of the liquid inlet pipeline and the liquid inlet of the heat dissipation unit The liquid inlet of the evaporator is connected to the inlet of the liquid return pipeline and the inlet of the cooling unit, and the liquid outlet of the evaporator is used to connect the outlet of the liquid return pipeline to the cooling device The liquid inlet end; the first pump unit is located between the liquid inlet of the condenser and the inlet of the liquid inlet pipeline or between the liquid outlet of the condenser and the outlet of the liquid inlet pipeline; The second pump unit is located between the liquid inlet of the evaporator and the inlet of the liquid return line or between the liquid outlet of the evaporator and the outlet of the liquid return line; wherein, the The hybrid refrigeration device is capable of switching between a free cooling state and a hybrid refrigeration state. In the natural cooling state, when the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the first external temperature of the current external environment, the first valve body and the second valve body are connected, and the first pump unit and the second pump unit are both closed, the liquid at the liquid outlet of the refrigeration equipment is supplied to the liquid inlet of the heat dissipation unit through the first valve body, and after being radiated by the heat dissipation unit, it passes through the return The liquid pipeline is provided to the liquid inlet end of the refrigeration equipment, and the temperature of the liquid at the liquid inlet end of the refrigeration equipment is a second temperature value, and the second temperature value is greater than the first ambient temperature and lower than the first external temperature value. temperature value; in the mixed refrigeration state, the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the second external temperature of the current external environment, the liquid-cooled refrigerator is turned on, and the first valve body and the The second valve body is closed, the first pump unit and the second pump unit are both open, and the liquid at the first temperature value at the liquid outlet end of the refrigeration equipment is converted into liquid at the third temperature value by the condenser. The liquid is then provided to the liquid inlet of the heat dissipation unit, and the liquid converted into a fourth temperature value after being radiated by the heat dissipation unit is provided to the liquid inlet of the evaporator, and is converted into a liquid having the above-mentioned temperature by the evaporator. The liquid with the second temperature value is provided to the liquid inlet port of the refrigeration equipment, wherein the second external temperature is greater than the first external temperature, and the first temperature value is greater than the second external temperature and less than The third temperature value and the fourth temperature value are greater than the second ambient temperature and less than the third temperature value.

In one embodiment, the number of the first pump unit, the second pump unit, the liquid-cooled cooler, and the heat dissipation unit is at least two, and the liquid inlet pipeline and the return pipeline The number of liquid pipelines is two and connected in parallel with each other. Each of the first pump unit, each of the second pump units, and each of the liquid-cooled coolers form a liquid-cooled module, and each of the heat-dissipating units The liquid inlets are connected together and are both connected to the outlets of the two liquid inlet pipelines, the liquid outlets of each of the heat dissipation units are connected together and are connected to the inlets of the liquid return pipelines, and each of the liquid return pipes The outlet of the pipeline is used to connect the liquid inlet end of the refrigeration equipment, each of the condenser liquid outlets is connected to the outlets of the two liquid inlet pipelines, and each of the condenser liquid inlets is connected to the liquid inlet The inlet of the pipeline and the liquid outlet of the refrigeration equipment, each of the evaporator liquid inlets are connected between the inlets of the two return liquid pipelines and the liquid outlets of each of the cooling units, each of the The liquid outlets of the evaporator are connected to the outlets of the two liquid return lines so as to be connected to the liquid inlet end of the refrigeration equipment.

In one embodiment, the connection between the inlet of the liquid inlet pipeline and the liquid outlet of the refrigeration equipment is also used to connect the third pump unit or the outlet of the liquid return pipeline to the inlet of the refrigeration equipment. The liquid ends are also used to connect a third pump unit, and the third pump unit is turned on in both the natural cooling state and the mixed refrigeration state.

In one embodiment, the hybrid refrigeration device further includes a controller, the controller is used to receive an external signal or a trigger signal to control when the hybrid refrigeration device is in the natural cooling state or the hybrid cooling state or in the The controller is used to control the hybrid refrigeration device to be in the natural cooling state or the hybrid refrigeration state according to the obtained current external temperature.

In one embodiment, the hybrid refrigeration device further includes a cold storage module, the cold storage module includes a cold storage tank, a fourth pump unit, and at least one regulating valve, and the liquid inlet of the cold storage tank is connected to the liquid outlet of the evaporator. The liquid outlet of the cold storage tank is connected to the liquid inlet of the evaporator via the fourth pump unit, the at least one regulating valve is a three-way valve, and the three valve ports of the three-way valve are respectively connected to To the liquid inlet of the cold storage tank, between the liquid outlet of the cold storage tank and the fourth pump unit, and the outlet of the liquid return line; or the at least one regulating valve includes a first two-way valve and a second two-way valve, the first two-way valve is connected between the liquid inlet of the cold storage tank and the outlet of the liquid return line, and the second two-way valve is respectively connected to the first Between the two-way valve and the outlet of the liquid return line and between the liquid outlet of the cold storage tank and the fourth pump unit, when the hybrid refrigeration device is in a valley power period, the first pump unit and the fourth pump unit are turned on, the second pump unit is turned off, the liquid-cooled cooler is turned on, and the liquid outlet of the evaporator provides liquid with a fifth temperature value to charge the cold storage tank, so The liquid from the liquid outlet of the cold storage tank passes through the fourth pump unit to the liquid inlet of the evaporator until the liquid temperature of the cold storage tank reaches the fifth temperature value, and the fifth temperature value is not higher than The second temperature value; when the hybrid refrigeration device is in the natural cooling state and peak power period, the second pump unit is turned on, the first pump unit and the fourth pump unit are turned off, and the The temperature of the liquid at the liquid outlet of the evaporator is the sixth temperature value, and the sixth temperature value is greater than the second temperature value. By controlling the opening degree of the regulating valve, the liquid at the liquid outlet of the cold storage tank and the The liquid at the liquid outlet of the evaporator is mixed into liquid having the second temperature value and supplied to the outlet of the liquid return line to be supplied to the liquid inlet end of the refrigeration device.

In one embodiment, the heat dissipation unit includes a heat dissipation fan. In the natural cooling state, when the outlet liquid temperature after heat dissipation by the heat dissipation unit is lower than the second temperature value, the hybrid refrigeration device controls the The speed of the heat dissipation fan is reduced until the liquid temperature after heat dissipation by the heat dissipation unit is equal to the second temperature value; in the natural cooling state, when the liquid temperature after heat dissipation by the heat dissipation unit is higher than the second temperature value temperature value and the speed of the heat dissipation fan does not reach the maximum threshold, the hybrid refrigeration device controls the speed of the heat dissipation fan to increase until the temperature of the liquid after heat dissipation by the heat dissipation unit is equal to the second temperature value; In the natural cooling state, when the outlet liquid temperature after heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan has reached a maximum threshold, the hybrid refrigeration device is controlled to enter the hybrid refrigeration state.

In one embodiment, at least one of the first valve body and the second valve body is a one-way check valve.

A refrigeration system, comprising the hybrid refrigeration device described in any one of the above embodiments, the refrigeration equipment and the heat dissipation unit.

In one embodiment, the number of the hybrid refrigeration device and the heat dissipation unit are at least two, and the refrigeration system further includes a liquid supply annular pipeline and a liquid return annular pipeline, and a plurality of the hybrid refrigeration devices A plurality of the liquid inlet pipelines are connected in parallel and connected to the liquid outlet of the refrigeration equipment through the liquid supply annular pipeline, and the outlets of the liquid return pipelines of the multiple hybrid refrigeration devices are connected in parallel and connected through the The liquid return circular pipeline is connected to the liquid inlet end of the refrigeration equipment.

A method for controlling a refrigeration system, the refrigeration system comprising a liquid inlet pipeline with a first valve body, a liquid return pipeline with a second valve body, a first pump unit, a second pump unit, a liquid-cooled refrigerator, A heat dissipation unit and a refrigeration device, the liquid-cooled refrigerator has an evaporator liquid outlet, an evaporator liquid inlet, a condenser liquid outlet, and a condenser liquid inlet, and the first pump unit is located at the condenser liquid inlet Between the inlet of the liquid inlet and the inlet of the liquid inlet or between the outlet of the condenser and the outlet of the inlet of the liquid; the second pump unit is located between the inlet of the evaporator and the outlet of the inlet of the liquid Between the inlets of the return line or between the liquid outlet of the evaporator and the outlet of the return line, the control method includes the following steps: in the natural cooling state, the outlet of the refrigeration equipment The first temperature value of the liquid end is greater than the first external temperature of the current external environment, the first valve body and the second valve body are connected, the first pump unit and the second pump unit are both closed, and the refrigeration The liquid at the liquid outlet end of the equipment is supplied to the liquid inlet of the heat dissipation unit through the liquid inlet pipeline, and is supplied to the liquid inlet end of the refrigeration equipment through the liquid return pipeline after heat dissipation by the heat dissipation unit , the liquid temperature at the liquid inlet end of the refrigeration equipment is a second temperature value, and the second temperature value is greater than the first external temperature and less than the first temperature value; in the mixed refrigeration state, the refrigeration equipment The first temperature value of the liquid outlet end is greater than the second external temperature of the current external environment, the liquid-cooled cooler is turned on, the first valve body and the second valve body are closed, the first pump unit, the The second pump units are all turned on, and the liquid at the first temperature value at the liquid outlet end of the refrigeration equipment is converted into liquid at a third temperature value by the condenser and then supplied to the liquid inlet port of the heat dissipation unit, The liquid converted into the fourth temperature value after being dissipated by the heat dissipation unit is provided to the liquid inlet of the evaporator, and the liquid converted into the second temperature value through the evaporator is provided to the refrigeration device The liquid inlet end, wherein, the second external temperature is greater than the first external temperature, the first temperature value is greater than the second external temperature and less than the third temperature value, and the fourth temperature value is greater than The second ambient temperature is lower than the third temperature value.

In one embodiment, the control method further includes the following steps: receiving an external signal or a trigger signal to control the natural cooling state or the mixed refrigeration state; or obtaining the current external temperature, and controlling the temperature according to the current external temperature In said natural cooling state or in said mixed refrigeration state.

In one embodiment, the hybrid refrigeration module further includes a cold storage module, the cold storage module includes a cold storage tank, a fourth pump unit, and at least one regulating valve, and the liquid inlet of the cold storage tank is connected to the liquid outlet of the evaporator. The liquid outlet of the cold storage tank is connected to the liquid inlet of the evaporator via the fourth pump unit, the at least one regulating valve is a three-way valve, and the three valve ports of the three-way valve are respectively connected to To the liquid inlet of the cold storage tank, between the liquid outlet of the cold storage tank and the fourth pump unit, and the outlet of the liquid return line; or the at least one regulating valve includes a first two-way valve and a second two-way valve, the first two-way valve is connected between the liquid inlet of the cold storage tank and the outlet of the liquid return line, and the second two-way valve is respectively connected to the first Between the two-way valve and the outlet of the liquid return line and between the liquid outlet of the cold storage tank and the fourth pump unit, the control method further includes the following steps: when the hybrid refrigeration device is in the In the natural cooling state and the valley power period, the first pump unit and the fourth pump unit are both turned on, the second pump unit is turned off, the liquid-cooled cooler is turned on, and the liquid outlet of the evaporator provides a The liquid with the fifth temperature value is charged to the cold storage tank, and the liquid at the liquid outlet of the cold storage tank is sent to the liquid inlet of the evaporator through the fourth pump unit until the temperature of the liquid in the cold storage tank reaches the specified temperature. The fifth temperature value, the fifth temperature value is not higher than the second temperature value; when the hybrid refrigeration device is in the peak power period, the second pump unit is turned on, the first pump unit and all The fourth pump units are all closed, the liquid temperature of the liquid outlet of the evaporator is the sixth temperature value, and the sixth temperature value is greater than the second temperature value. By controlling the opening degree of the regulating valve, the The liquid at the liquid outlet of the cold storage tank is mixed with the liquid at the liquid outlet of the evaporator to form a liquid with the second temperature value and is supplied to the outlet of the liquid return line to be supplied to the refrigeration equipment of the liquid inlet.

In one embodiment, the heat dissipation unit includes a heat dissipation fan, and the control method further includes the following step: in the natural cooling state, when the outlet liquid temperature after heat dissipation by the heat dissipation unit is lower than the second temperature value , control the speed of the heat dissipation fan to decrease until the temperature of the liquid after heat dissipation by the heat dissipation unit is equal to the second temperature value; in the natural cooling state, when the liquid temperature after heat dissipation by the heat dissipation unit is higher than When the second temperature value and the speed of the heat dissipation fan do not reach the maximum threshold, control the speed of the heat dissipation fan to increase until the temperature of the liquid after heat dissipation by the heat dissipation unit is equal to the second temperature value; In the cooling state, when the temperature of the outlet liquid after heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan has reached a maximum threshold, control enters into the mixed refrigeration state.

A computer-readable storage medium, characterized in that the computer-readable storage medium includes a control method program for a hybrid refrigeration device of a refrigeration system, and when the control method program for a hybrid refrigeration device of a refrigeration system is executed by a processor, Realize the control method described in any one of the above embodiments.

Compared with the prior art, the beneficial effects of the technical solution of the present application are:

In the hybrid refrigeration device, the refrigeration system and its control method, and the storage medium provided in the embodiments of the present application, the outdoor temperature is low, and when the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the first external temperature of the current external environment, through natural In the cooling state, cooling by the heat dissipation unit can effectively reduce the cooling cost; the outdoor temperature is relatively high, and the first temperature value of the liquid outlet of the refrigeration equipment is greater than the second external temperature of the current external environment. Through the mixed cooling state, the The cooling unit and the liquid-cooled refrigerator work together to refrigerate. Compared with the device, system and control method for cooling only through mechanical refrigeration, the cooling cost is effectively reduced; in addition, in the above-mentioned device and system, mainly through The design and control of the first and second two valve bodies and two pump units can realize the switching between the natural cooling state and the mixed refrigeration state, the system control and pipeline design are relatively simple, and the hardware cost and installation transformation The cost is also lower.

Description of drawings

FIG. 1 is a schematic structural diagram of a refrigeration system provided in Embodiment 1 of the present application.

Fig. 2 is a schematic structural diagram of another refrigeration system provided in Embodiment 1 of the present application.

Fig. 3 is a schematic diagram of a liquid flow path of the refrigeration system shown in Fig. 1 in a state of natural cooling.

Fig. 4 is a schematic diagram of a liquid flow path of the refrigeration system shown in Fig. 1 in a mixed refrigeration state.

Fig. 5 is a schematic structural diagram of another refrigeration system provided in Embodiment 1 of the present application.

Fig. 6 is a flowchart of a control method of the refrigeration system shown in Fig. 1 .

Fig. 7 is a flowchart of another control method of the refrigeration system shown in Fig. 1 .

Fig. 8 is a comparison chart of natural cooling capacity and mechanical cooling capacity of auxiliary cooling in different months of the refrigeration system shown in Fig. 1 .

Fig. 9 is a flow chart of still another control method of the refrigeration system shown in Fig. 1 .

FIG. 10 is a schematic structural diagram of a refrigeration system provided in Embodiment 2 of the present application.

FIG. 11 is a schematic structural diagram of another refrigeration system provided in Embodiment 2 of the present application.

FIG. 12 is a schematic diagram of the liquid flow path of the refrigeration system shown in FIG. 10 in the natural cooling state and in the valley power period.

FIG. 13 is a schematic diagram of the liquid flow path of the refrigeration system shown in FIG. 10 in a natural cooling state and during a peak power period.

Fig. 14 is a flowchart of a control method of the refrigeration system shown in Fig. 10 .

Fig. 15 is a flowchart of another control method of the refrigeration system shown in Fig. 10 .

Fig. 16 is a schematic diagram of changes in the cold storage capacity of the cold storage tank of the refrigeration system shown in Fig. 10 .

Fig. 17 is a schematic diagram of the temperature change of the liquid in the cold storage tank of the refrigeration system shown in Fig. 10 .

Fig. 18 is a schematic structural diagram of a refrigeration system provided in Embodiment 3 of the present application.

Fig. 19 is a schematic structural diagram of another refrigeration system provided in Embodiment 3 of the present application.

Fig. 20 is a schematic diagram of the liquid flow path of the refrigeration system shown in Fig. 18 in a state of natural cooling.

Fig. 21 is a schematic diagram of the liquid flow path of the refrigeration system shown in Fig. 18 in a mixed refrigeration state.

Fig. 22 is a schematic structural diagram of a refrigeration system provided in Embodiment 4 of the present application.

FIG. 23 is a schematic structural diagram of a storage medium provided in Embodiment 5 of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some of the embodiments of the present disclosure, not all of them. Based on the described embodiments of the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative effort fall within the protection scope of the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

Embodiment one

As shown in FIG. 1 , this embodiment discloses a refrigeration system 10 that can be used for refrigeration in a data center, and mainly includes a refrigeration device 20 , a hybrid refrigeration device 30 and a heat dissipation unit 40 . Wherein, the refrigeration device 20 can be arranged adjacent to the heat source (such as a server) of the data center, and it can be used for cooling air conditioners and other equipment. The heat dissipation unit 40 can be a closed cooling tower/dry cooler, which can include a heat dissipation fan 41. Dissipates heat by exchanging heat with the outdoor ambient air. The hybrid refrigeration device 30 can be connected to the refrigeration equipment 20 and the heat dissipation unit 40, and has a natural cooling state and a hybrid refrigeration state, and is used to cooperate with the refrigeration equipment 20 and/or the heat dissipation unit to dissipate heat in the data center, cool down.

Specifically, the hybrid refrigeration device 30 may include a liquid inlet pipeline 31 with a first valve body 311 , a liquid return pipeline 32 with a second valve body 321 , a liquid-cooled refrigerator 33 , a first pump unit 34 and a second pump unit 34 . Second pump unit 35 .

It can be understood that the first valve body 311 is located between the inlet of the liquid inlet pipeline 31 and the outlet of the liquid inlet pipeline 31, wherein the inlet of the liquid inlet pipeline 31 is used to connect the refrigeration The liquid outlet of the device 20 and the outlet of the liquid inlet pipeline 31 are used to connect to the liquid inlet of the heat dissipation unit 40 .

The second valve body 321 is located between the inlet of the liquid return pipeline 32 and the outlet of the liquid return pipeline 32 , wherein the inlet of the liquid return pipeline 32 is used to connect to the cooling unit 40 Liquid outlet, the outlet of the liquid return line 32 is used to connect to the liquid inlet port of the refrigeration equipment 20 .

The liquid-cooled refrigerator 33 may be a mechanical refrigeration device, which may include a mechanical refrigeration circuit composed of an evaporator 331 , an expansion valve 332 , a condenser 333 and a compressor 334 connected in sequence. The liquid-cooled refrigerator 33 has an evaporator liquid inlet 335 , an evaporator liquid outlet 336 , a condenser liquid inlet 337 , and a condenser liquid outlet 338 . Wherein, the condenser liquid inlet 337 is connected to the inlet of the liquid inlet pipeline 31, and the condenser liquid outlet 338 is used to connect the outlet of the liquid inlet pipeline 32 and the liquid inlet of the heat dissipation unit 40. mouth. The evaporator liquid inlet 335 is connected to the inlet of the liquid return line 32 and the inlet of the cooling unit 40 , and the evaporator liquid outlet 336 is used to connect the outlet of the liquid return line 32 to the The liquid inlet end of the refrigeration equipment 20;

The first pump unit 34 and the second pump unit 35 can be respectively power units for controlling the direction of liquid flow, such as pressure pumps or variable frequency pumps, but are not limited to the above. Specifically, the first pump unit 34 is used for Powering the liquid circuit with the condenser 333 , the second pump unit 35 is used to power the liquid circuit with the evaporator 331 .

The first pump unit 34 may be located between the condenser liquid inlet 337 and the inlet of the liquid inlet pipeline 31 . As shown in FIG. 2 , in an alternative embodiment, the first pump unit 34 may also be located between the condenser liquid outlet 338 and the outlet of the liquid inlet pipeline 31 .

The second pump unit 35 may be located between the evaporator liquid inlet 335 and the inlet of the liquid return line 32 . As shown in FIG. 2 , in an alternative embodiment, the second pump unit 35 may also be located between the liquid outlet 336 of the evaporator and the outlet of the liquid return line 32 .

The refrigeration system 10 may also include a third pump unit 36, which is used to provide power to the liquid circuit with the refrigeration equipment 20, which may be a power unit for controlling the direction of liquid flow, such as a pressure pump or a variable frequency pump, but not Limited to the above, in this embodiment, the third pump unit 36 is turned on in both the natural cooling state and the mixed cooling state. Specifically, the third pump unit 36 may be connected between the inlet of the liquid inlet line 31 and the liquid outlet of the refrigeration equipment 20 or between the outlet of the liquid return line 32 and the refrigeration unit. Between the liquid inlet ends of the device 20. In this embodiment, the third pump unit 36 is arranged outside the hybrid refrigeration device 30, however, in some other embodiments, the third pump unit 36 can also be integrated into the hybrid refrigeration device 30 .

It can be understood that the liquid in each pipeline in the refrigeration system 10 can be water or antifreeze, which can be selected according to actual needs.

The hybrid refrigeration device 30 can be switched between a natural cooling state and a hybrid refrigeration state.

As shown in FIG. 3 , the hybrid refrigeration device 30 works in the natural cooling state, the first temperature value of the liquid outlet end of the refrigeration equipment 20 is greater than the first external temperature of the current external environment, and the first valve body 311 and The second valve body 321 is connected, the first pump unit 34 and the second pump unit 35 are both closed, and the liquid at the liquid outlet end of the refrigeration equipment 20 is provided to the The liquid inlet of the heat dissipation unit 40 is provided to the liquid inlet end of the refrigeration device 20 through the liquid return line 31 after the heat dissipation by the heat dissipation unit 40, and the liquid temperature of the liquid inlet end of the refrigeration device 20 is A second temperature value, where the second temperature value is greater than the first external temperature and less than the first temperature value.

As shown in FIG. 4, the hybrid refrigeration device 30 works in the hybrid refrigeration state, the first temperature value of the liquid outlet end of the refrigeration equipment 20 is greater than the second external temperature of the current external environment, and the liquid-cooled refrigerator 33 is open, the first valve body 311 and the second valve body 321 are closed, the first pump unit 34 and the second pump unit 35 are both open, and the first The liquid of one temperature value is converted into the liquid of the third temperature value by the condenser 333 and then supplied to the liquid inlet of the heat dissipation unit 40 , and then converted into the liquid of the fourth temperature value after being radiated by the heat dissipation unit 40 Provided to the liquid inlet of the evaporator 331, the liquid converted into the second temperature by the evaporator 331 is provided to the liquid inlet of the refrigeration device 20, wherein the second ambient temperature greater than the first external temperature, the first temperature value is greater than the second external temperature and less than the third temperature value, and the fourth temperature value is greater than the second external temperature and less than the third temperature value.

In the hybrid refrigeration device 30 provided in the embodiment of the present application, the outdoor temperature is relatively low (that is, the current external temperature), and when the first temperature value of the liquid outlet end of the refrigeration device 20 is greater than the first external temperature of the current external environment, the natural In the cooling state, cooling by the heat dissipation unit 40 can effectively reduce the cooling cost; the outdoor temperature is relatively high, and the first temperature value of the liquid outlet of the refrigeration device 20 is greater than the second external temperature of the current external environment, through the mixed cooling state , the heat dissipation unit 40 and the liquid-cooled refrigerator 33 jointly perform refrigeration, compared with a device that only uses mechanical refrigeration to perform refrigeration, its refrigeration cost is effectively reduced, and it has a relatively energy-saving technical effect; in addition, the above-mentioned device And in the system, the switching between the natural cooling state and the mixed refrigeration state can be realized mainly through the design and control of the first and second two

valve bodies

311, 321 and the two

pump units

34, 35, system control and The pipeline design is relatively simple, and the hardware cost and installation and transformation cost are also low.

At least one of the first valve body 311 and the second valve body 321 may be a one-way check valve. In this embodiment, both the first valve body 311 and the second valve body 321 are one-way check valves. The directional check valve mainly realizes the one-way control of the liquid flow direction by closing the valve when the outlet pressure is greater than the inlet pressure. It has a mechanical action structure and is easy to install and use. It can be understood that in this embodiment, the control of the first valve body 311 and the second valve body 321 is mainly realized by controlling the power of the first pump unit 34 , the second pump unit 35 and the third pump unit 36 . On or off control. Certainly, in some modified embodiments, the first valve body 311 and the second valve body 321 may also be electric two-way valves, as shown in FIG. 5 .

Specifically, in some embodiments, the hybrid refrigeration device 30 can directly receive an external control signal to switch between the natural cooling state and the hybrid refrigeration state, such as the liquid-cooled refrigerator 33, the The first pump unit 34 and the second pump unit 35 can directly receive control signals provided by external equipment to switch between the natural cooling state and the mixed cooling state, or the liquid-cooled refrigerator 33, the The first pump unit 34, the second pump unit 35, the first valve body 311, and the second valve body 321 can receive control signals provided by external equipment to switch between the natural cooling state and the mixed refrigeration state. switch.

In some embodiments, the refrigeration system 10 may include a controller 50 for receiving an external signal or a trigger signal to control when the hybrid refrigeration device 30 is in the natural cooling state or in the hybrid refrigeration state. state. It can be understood that the controller 50 can be electrically connected to the liquid-cooled refrigerator 33, the first pump unit 34 and the second pump unit 35, so as to control the opening or closing of the liquid-cooled refrigerator 33, and The opening and closing of the first pump unit 34 and the second pump unit 35 are controlled. The external signal can be a signal provided to the controller 50 by an external control system or device (such as a control terminal such as a computer or a mobile phone), and the trigger signal can be a user input device (such as a keyboard, a mouse, a remote controller, or a microphone). etc.) using the trigger signal generated by voice and/or operation action.

In this embodiment, the controller 50 is configured to control the hybrid refrigeration device 30 to be in the natural cooling state or the hybrid refrigeration state according to the obtained current external temperature. It can be understood that the controller 50 may be located in the hybrid refrigeration device 30 , or may be a module independent of the hybrid refrigeration device 30 , or integrated in the heat dissipation unit 40 or the refrigeration device 20 . Of course, when the controller 50 is located in the hybrid refrigeration device 30, for a data center that has been equipped with the refrigeration equipment 20 and the heat dissipation unit 40, additionally adding the above hybrid refrigeration device 30 can realize data The energy-saving upgrade of the refrigeration system in the center is not only low cost, but also relatively simple to install.

As shown in FIG. 6 , in this embodiment, the control method of the refrigeration system 10 may be executed by the controller 50 , specifically, the control method may include the following steps S11 , S12 and S13 .

Step S11, obtaining the current external temperature, and controlling the hybrid refrigeration device 30 to be in the natural cooling state or the hybrid refrigeration state according to the current external temperature. Specifically, in the step S11, the current ambient temperature may be compared with a preset threshold, and if the current ambient temperature is less than or equal to the preset threshold, step S12 is executed, that is, the hybrid refrigeration device 30 is controlled to In the natural cooling state, if the current ambient temperature is greater than the preset threshold, step S13 is executed, that is, controlling the hybrid refrigeration device 30 to be in the hybrid refrigeration state.

Step S12, in the natural cooling state, the first temperature value of the liquid outlet end of the refrigeration device 20 is greater than the current first ambient temperature of the outside world, the first valve body 311 and the second valve body 321 are connected, Both the first pump unit 34 and the second pump unit 35 are closed, and the liquid at the liquid outlet end of the refrigeration device 20 is supplied to the liquid inlet port of the heat dissipation unit 40 through the first valve body 311 , and the liquid is supplied to the liquid inlet port of the cooling unit 40 through the first valve body 311 . After the heat dissipation unit 40 dissipates heat, it is provided to the liquid inlet end of the refrigeration device 20 through the liquid return line 32, and the temperature of the liquid at the liquid inlet end of the refrigeration device 20 is a second temperature value, and the second temperature A value greater than the first ambient temperature and less than the first temperature value.

Step S13, in the mixed refrigeration state, the first temperature value of the liquid outlet end of the refrigeration equipment 20 is greater than the second external temperature of the current external environment, the liquid-cooled refrigerator 33 is turned on, and the first valve body 311 and the second valve body 321 are closed, the first pump unit 34 and the second pump unit 35 are both open, and the liquid at the first temperature value at the liquid outlet end of the refrigeration equipment 20 passes through the condenser 333, the liquid converted to the third temperature value is provided to the liquid inlet of the heat dissipation unit 40, and the liquid converted to the fourth temperature value after being radiated by the heat dissipation unit 40 is provided to the evaporator 331 for liquid intake. port, the liquid converted into the second temperature value by the evaporator 331 is supplied to the liquid inlet port of the refrigeration device 20, wherein the second ambient temperature is greater than the first ambient temperature, and the The first temperature value is greater than the second ambient temperature and smaller than the third temperature value, and the fourth temperature value is larger than the second ambient temperature and smaller than the third temperature value.

In the above control method shown in FIG. 6 , the hybrid refrigeration device 30 is mainly controlled to be in the natural cooling state or the hybrid refrigeration state according to the current external temperature. However, as mentioned above, in the modified embodiment , as shown in FIG. 5 , in the control method, step S11 may also be: receiving an external signal or a trigger signal to control the hybrid refrigeration device 30 to be in the natural cooling state or the hybrid refrigeration state.

The working process and control method of the refrigeration system 10 will be schematically described below in conjunction with a specific example. Specifically, for example, the preset threshold may be set to 19°C, the first temperature value may be set to 34°C, and the second temperature value may be set to 22°C.

As shown in FIG. 3, if the current external temperature is 19°C (that is, the first external temperature is 19°C), the controller 50 obtains the first external temperature and determines whether the first external temperature is less than or equal to The preset threshold value, because at this time, the first external temperature is equal to the preset threshold value, and the above judgment result is yes, then the controller 50 controls to enter the natural cooling state of the hybrid refrigeration device 30, that is, Control the first pump unit 34 and the second pump unit 35 to close, the third pump unit 36 to open, and the 34°C liquid at the liquid outlet end of the refrigeration equipment 20 to provide power through the third pump unit 36 After passing through the first valve body 311, it flows to the heat dissipation unit 40 to dissipate heat, and the temperature of the liquid dissipated by the heat dissipation unit 40 is reduced to 22°C, and then flows into the inlet of the refrigeration equipment 20 through the second valve body 321. The liquid end cools the heat source of the data center (that is, the equipment that needs to be dissipated). For example, in this process, the heat dissipation of the heat dissipation unit 40 may be 1500kW, the cooling capacity of the liquid-cooled refrigerator 33 is 0kW, the cooling capacity of the refrigeration equipment 20 is 1500kW, and the natural cooling capacity is 1500kW . Compared with some related technologies that start the natural cooling state below 12°C, since the outdoor ambient temperature threshold for completely natural cooling in the natural cooling state is raised to 19°C, the utilization time of the natural cooling state can be greatly increased, and the Electricity running costs.

As shown in FIG. 4, if the current external temperature is 30° C. (that is, the second external temperature is 30° C.), the controller 50 obtains the second external temperature, and judges whether the second external temperature is less than or equal to The preset threshold value, because at this time, the second external temperature is greater than the preset threshold value, and the above judgment result is no, the controller 50 controls to enter the hybrid refrigeration state of the hybrid refrigeration device 30 , so The first pump unit 34, the second pump unit 35 and the third pump unit 36 are all open, the first valve body 311 and the second valve body 321 are all closed, and the temperature of the liquid outlet of the refrigeration equipment 20 is 34°C After the liquid is converted into a liquid at 39°C by the condenser, it is supplied to the liquid inlet of the heat dissipation unit 40, and after being radiated by the heat dissipation unit 40, it is converted into a liquid at 32°C and then supplied to the evaporator Liquid inlet port, the liquid converted to 22° C. by the evaporator is provided to the liquid inlet port of the cooling device 20 to cool the heat source of the data center (ie, the equipment that needs to dissipate heat). During this process, if the heat dissipation of the heat dissipation unit 40 is 1500kW, the mechanical cooling capacity of the liquid-cooled cooler 33 is 1200kW, the cooling capacity of the refrigeration system 10 is 1500kW, and the natural cooling capacity is 300kW. Since the liquid temperature (34°C) at the liquid outlet of the refrigeration device 20 is higher than the current outside temperature (30°C), the cooling unit 40 can always be turned on for natural cooling, and the cooling capacity provided by natural cooling is not enough to load The part is supplemented by the mechanical refrigeration of the liquid-cooled chiller 33 to meet the heat dissipation load demand of the data center, so that the utilization time of natural cooling can be greatly increased and the power operation cost can be reduced.

As shown in Figure 8, for the refrigeration system 10 available in a certain inland city (such as Beijing) in the middle of mainland China, during the winter and spring seasons from October to March next year, the temperature is relatively low, and 100% of the refrigeration system can be used to enter all refrigeration systems. Natural cooling is carried out in the above-mentioned naturally coolable state. During the summer and autumn seasons from April to September, the outdoor air temperature is relatively high, and the cooling capacity of natural cooling is insufficient to meet the demand. Therefore, it is necessary to enter the mixed cooling state, and the heat dissipation unit 40 Together with the liquid-cooled refrigerator 33, it is turned on for mixed refrigeration.

Further, considering that when the temperature of the external environment is low, in the natural cooling state, the outlet liquid temperature after heat dissipation by the heat dissipation unit 30 may appear to be less than or greater than the second temperature value, at this time the The controller is also used to adjust the switch and/or speed of the heat dissipation fan 41 of the heat dissipation unit 40 according to the temperature of the liquid outlet after the heat dissipation of the heat dissipation unit 40, or to adjust to the mixed refrigeration state, so as to finally realize The temperature of the liquid after heat dissipation by the heat dissipation unit 40 is equal to the target of the second temperature value.

Therefore, in some other embodiments, in the natural cooling state, when the outlet liquid temperature after the heat dissipation by the heat dissipation unit 40 is lower than the second temperature value, the controller 50 controls the heat dissipation of the heat dissipation fan 41 The rotation speed decreases until the temperature of the liquid after heat dissipation by the heat dissipation unit 40 is equal to the second temperature value. In the natural cooling state, when the outlet liquid temperature after heat dissipation by the heat dissipation unit 40 is higher than the second temperature value and the speed of the heat dissipation fan 41 does not reach the maximum threshold, the controller 50 controls the The speed of the heat dissipation fan 41 is increased until the temperature of the liquid after heat dissipation by the heat dissipation unit 40 is equal to the second temperature value;

In the natural cooling state, when the outlet liquid temperature after cooling by the cooling unit 40 is higher than the second temperature value and the speed of the cooling fan 41 has reached the maximum threshold, the controller 50 controls to enter the The mixed refrigeration state described above.

Therefore, as shown in FIG. 9 , yet another control method of the refrigeration system 10 may include the following steps S21 , S22 , S23 , S24 , and S25 .

Step S21, obtaining the current ambient temperature, and judging whether the current ambient temperature is less than or equal to the preset threshold, if not, execute step S26, control to enter the mixed cooling state, and if so, execute step S22.

Step S22, judging whether the outlet liquid temperature after heat dissipation by the heat dissipation unit 40 (that is, the temperature of the liquid outlet of the heat dissipation unit 40) is greater than the second temperature value (that is, the temperature set by the liquid inlet port of the refrigeration device 20). required set temperature), if yes, execute step S23; if not, execute step S25.

Step S23 , judging whether the rotational speed of the heat dissipation fan 41 passing through the heat dissipation unit 40 has not reached the maximum threshold, if yes, execute step S24 ; if not, execute step S26 .

Step S24, enter the natural cooling state (that is, execute the specific control as in step S12) and increase the speed of the cooling fan 41 .

Step S25, enter the natural cooling state (i.e. perform specific control as in step S12) and control the speed of the heat dissipation fan 41, such as reducing, so that the outlet liquid temperature of the heat dissipation unit 40 with the reduced speed of the fan is equal to the The second temperature value is at or below the second temperature value. It can be understood that in step S25, when the outlet liquid temperature after heat dissipation by the heat dissipation unit 40 is lower than the second temperature value, it means that the outlet liquid temperature after heat dissipation by the heat dissipation unit 40 can meet the inlet liquid temperature of the refrigeration device. (that is, the second temperature value), the natural cooling mode can be operated at this time, and the speed of the heat dissipation fan 41 of the heat dissipation unit 40 is controlled (reduced), so that the liquid outlet of the heat dissipation unit 40 that the fan speed reduces The temperature is equal to the second temperature value.

Step S26, enter the mixed cooling state (that is, execute the specific control as in step S13).

Embodiment two

Please refer to FIG. 10 , the structure and principle of the refrigeration system 10 provided by the second embodiment are basically the same as those of the refrigeration system 10 in the first embodiment, and the differences between the two are mainly described below.

In the second embodiment, the hybrid refrigeration device 30 further includes a cold storage module 60, and the cold storage module 60 includes a cold storage tank 61, a fourth pump unit 62 and at least one regulating valve 63, and the liquid inlet of the cold storage tank 61 is connected to the The liquid outlet of the evaporator 331 is connected to the liquid inlet of the evaporator 331 through the fourth pump unit 62 . It can be understood that in the drawings of the second embodiment, the controller is not shown. However, it can be understood that the controller of the second embodiment, like the controller 50 shown in FIG. 1 , can be electrically connected to each of the

The pump units

34, 35, 62, at least one regulating valve 63, the liquid-cooled cooler 33, the cooling unit 40, etc. are used to control the components electrically connected thereto.

In this embodiment, the at least one regulating valve 63 includes a first two-way valve 631 and a second two-way valve 632, and the first two-way valve 631 is connected between the liquid inlet of the cold storage tank 61 and the return port. Between the outlets of the liquid pipeline 32, the second two-way valve 632 is respectively connected between the first two-way valve 631 and the outlet of the liquid return pipeline 32 and the liquid outlet of the cold storage tank 61 and the fourth pump unit 62 . As shown in FIG. 10, in another embodiment, as shown in FIG. 11, the at least one regulating valve 63 is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the cold storage tank 61 between the liquid inlet of the cold storage tank 61 and the fourth pump unit 62 , and the outlet of the liquid return line 32 .

It can be understood that, considering that in the natural cooling state, the liquid-cooled refrigerator 33 is completely closed, and the cooling capacity cannot be effectively utilized, by adding the cold storage module 60 for cold storage, it can be used in situations such as power failure or power shortage. The cooling of the cold storage module 60 is performed to cool the data center, so as to ensure the safe operation of the data center and reduce the power operation cost.

Specifically, the cold storage module 60 can have a cold storage state and a cooling state. Considering that the electricity price is different between the peak power period and the valley power period, it can store cold during the valley power period and cool down during the peak power period, thereby reducing cooling costs.

As shown in Figure 12, when the hybrid refrigeration device 30 is in the natural cooling state and the valley power period, both the first pump unit 34 and the fourth pump unit 62 are turned on, and the second pump unit 35 is turned off , the first valve body 311 and the second valve body 321 are both connected, the liquid-cooled cooler 33 is turned on, and the liquid outlet of the evaporator 331 provides liquid with a fifth temperature value to the cold storage tank 61 is charged with cold, the liquid at the liquid outlet of the cold storage tank 61 passes through the fourth pump unit 62 to the liquid inlet of the evaporator 331 until the liquid temperature of the cold storage tank 61 reaches the fifth temperature value, The fifth temperature value is not higher than the second temperature value.

As shown in Figure 13, when the hybrid refrigeration device 30 is in the natural cooling state and peak power period, the second pump unit 35 is turned on, and both the first pump unit 34 and the fourth pump unit 62 are turned off , the first valve body 311 and the second valve body 321 are both connected, the liquid temperature at the liquid outlet of the evaporator 331 is a sixth temperature value, and the sixth temperature value is greater than the second temperature value , by controlling the opening degree of the regulating valve 63, the liquid at the liquid outlet of the cold storage tank 61 (such as the liquid at the fifth temperature value) is mixed with the liquid at the liquid outlet of the evaporator 331 to have the The liquid with the second temperature value is provided to the outlet of the liquid return line 32 to be provided to the liquid inlet port of the refrigeration device 20 .

Wherein, in an embodiment, the fifth temperature value may be 5°C, and the sixth temperature value may be 26°C.

As shown in FIG. 12 , FIG. 13 and FIG. 14 , the control method of the refrigeration system 10 may further include steps S31 , S32 , S33 , S34 , S35 , S36 and S39 .

Step S31, judging whether it is in the natural cooling state, if yes, execute step S32, if not, execute step S35.

Step S32, judging whether it is the off-peak power time period, if yes, execute step S33, if not, execute step S35.

Step S33, judging whether the temperature of the liquid in the cold storage tank 61 has not reached the fifth temperature value, if yes, execute step S34, if not, execute step S35.

Step S34, enter the cooling charging mode until the liquid temperature of the cold storage tank 61 reaches the fifth temperature value. Specifically, in the step S34, both the first pump unit 34 and the fourth pump unit 62 are controlled to be turned on, the second pump unit 35 is turned off, and the first valve body 311 and the second valve body are controlled to be turned on. All bodies 321 are turned on, the liquid-cooled refrigerator 33 is turned on, and the liquid outlet of the evaporator 331 provides liquid with a fifth temperature value to charge the cold storage tank 61, and the liquid outlet of the cold storage tank 61 The liquid passes through the fourth pump unit 62 to the liquid inlet of the evaporator 331 until the temperature of the liquid in the cold storage tank 61 reaches the fifth temperature value, and the fifth temperature value is not higher than the second temperature value.

Step S35, maintaining the current operating state (such as the natural cooling state or the mixed cooling state).

Further, in another embodiment, considering whether it is in the natural cooling state or the mixed refrigeration state, the cold storage tank 61 can be refrigerated, so as to reduce the use of the liquid-cooled refrigerator 33 during peak power periods. , to reduce the electricity cost of the refrigeration system 10 . The hybrid refrigeration device 30 may also have the following working states.

In another embodiment, when the hybrid refrigeration device 30 is in the peak power period (whether it is in the natural cooling state or the hybrid refrigeration state), and the temperature of the liquid in the cold storage tank 61 is not high At the second temperature value, the liquid-cooled refrigerator 33 is turned off (that is, the refrigeration circuit corresponding to the evaporator 331 and the condenser 333 is not started, and the evaporator 331 does not perform heat exchange), and the first The valve body 311 and the second valve body 321 are both connected, the second pump unit 35 is opened, the first pump unit 34 and the fourth pump unit 62 are both closed, and by controlling the control valve 63 The degree of opening is such that the liquid at the liquid outlet of the refrigeration equipment 20 passes through the liquid inlet pipeline 31 , the pipeline of the heat dissipation unit 40 and the liquid return pipeline 32 to the liquid outlet of the cold storage tank 61 The liquid mixed with the liquid having the second temperature value is provided to the liquid inlet port of the refrigeration device 20 . Wherein, in the mixed cooling state and the peak power period, the cooling fan of the cooling unit 40 can be turned on or off, depending on whether the cold storage tank 61 can meet the cooling demand of the cooling device 20 .

Correspondingly, as shown in FIG. 15, in another embodiment, the control method of the refrigeration system 10 may include steps S36, S37, S38, and S39, for realizing the natural cooling state or the mixed refrigeration State cooling judgment and control.

Step S36, determine whether it is the peak power time period, if yes, execute step S37, if not, execute step S39, and maintain the current operating state (such as the natural cooling state or the mixed cooling state).

Step S37, judging whether the temperature of the liquid at the liquid outlet of the cold storage tank 61 is not higher than the second temperature value, if yes, execute step S38, if not, execute step S39.

Step S38, enter the cooling mode until the liquid temperature of the cold storage tank 61 reaches the preset temperature threshold. Specifically, in the step S38, the liquid-cooled refrigerator 33 is controlled to be closed (that is, the refrigeration circuit corresponding to the evaporator 331 and the condenser 333 is not started, and the evaporator 331 does not perform heat exchange), and the second A valve body 311 and the second valve body 321 are all connected, the first pump unit 34, the second pump unit 35 and the fourth pump unit 62 are all closed, and the regulating valve 63 is controlled The degree of opening is such that the liquid at the liquid outlet of the refrigeration equipment 20 passes through the liquid inlet pipeline 31 , the pipeline of the heat dissipation unit 40 and the liquid return pipeline 32 to the liquid outlet of the cold storage tank 61 The liquid is mixed into the liquid with the second temperature value, and when the temperature of the cold storage tank 61 is equal to the preset temperature threshold, the steps of the control method shown in FIG. 6 or FIG. 9 are further executed.

Step S39, maintaining the current operating state (such as the natural cooling state or the mixed cooling state).

In addition, as shown in FIG. 14 and FIG. 15, in another embodiment, if the judgment result of step S31 in FIG. S37, S38, S39, to confirm whether cooling is required in the mixed refrigeration state. In this way, the overall control logic of this yet another embodiment is simple, complete and easy to implement.

It can be understood that the pipeline between the at least one regulating valve 63 and the outlet of the liquid return pipeline 32 may be provided with a temperature sensor 64 (see FIG. 13 ) for detecting the temperature of the liquid in the pipeline. , so that the controller can control the opening degree of the at least one regulating valve 63 according to the temperature of the liquid, so that the liquid at the liquid outlet end of the refrigeration device 20 passes through the liquid inlet pipeline 31 and the pipe of the heat dissipation unit 40 The liquid at the liquid outlet of the cold storage tank 61 is mixed with the liquid at the liquid outlet of the cold storage tank 61 to form the liquid having the second temperature value.

As shown in Figure 16, the time period (T0～T1 time period) at 0-6 o'clock in the morning is the off-peak power period, the cold storage module 60 is charged with cold, and the cold storage capacity of the cold storage tank 61 continues to increase; at 6-12 o'clock , the liquid-cooled refrigerator 33 stops working and stops charging cold, and the cold storage capacity of the cold storage tank 61 remains unchanged; the time period from 12 to 15 o'clock (T2 to T3 time period) is the peak power period, and the cold storage module 60 to cool down, the cold storage capacity of the cold storage tank 61 continues to decrease, but is always not lower than the preset cold storage margin. During this process, the temperature change of the liquid in the cold storage tank 61 is shown in FIG. 17 .

Embodiment three

Please refer to FIG. 18 , the structure and principle of the refrigeration system 10 provided by the third embodiment are the same as those of the refrigeration system 10 in the first embodiment, and the differences between the two are mainly described below.

In the third embodiment, the number of the first pump unit 34, the second pump unit 35, the liquid-cooled cooler 33, and the heat dissipation unit 40 is at least two, and the liquid inlet pipeline 31 and The number of the liquid return pipelines 32 is two and connected in parallel with each other, and each of the first pump unit 34, each of the second pump unit 35, and each of the liquid-cooled refrigerators 33 forms a liquid-cooled module 70, the liquid inlets of each heat dissipation unit 40 are connected together and both are connected to the outlets of the two liquid inlet pipelines 31, the liquid outlets of each heat dissipation unit 40 are connected together and both are connected to the liquid return The inlet of the pipeline 32 and the outlet of each liquid return pipeline 32 are used to connect the liquid inlet of the refrigeration equipment, and the liquid outlets of each condenser are connected to the outlets of the two liquid inlet pipelines 31 Each of the condenser liquid inlets is connected to the inlet of the liquid inlet pipeline 31 and the liquid outlet of the refrigeration equipment, and each of the evaporator liquid inlets is connected to two of the liquid return pipelines 31 Between the inlet and the liquid outlet of each heat dissipation unit 40 , each liquid outlet of the evaporator is connected to the outlets of the two liquid return lines 32 to be connected to the liquid inlet of the refrigeration device.

Through the connection method in the third embodiment, the number of the liquid cooling modules 70 can be flexibly designed to realize redundant pipeline connections of the liquid cooling modules 70, which can meet the redundancy requirements of high-reliability cooling in data centers , to avoid problems such as inability to dissipate heat in time due to failure of part of the liquid cooling module 70 .

As shown in Figure 18, the first valve body 311 and the second valve body 321 are one-way check valves, however, as shown in Figure 19, in a modified embodiment, the first valve body At least one of 311 and the second valve body 321 can be replaced by an electric two-way valve.

In the natural cooling state, the first valve body 311 and the second valve body 321 are connected, the first pump unit 34 and the second pump unit 35 are closed, and the third pump unit 36 When it is turned on, the liquid flow path of the refrigeration system is as shown in Fig. 20 .

In the mixed refrigeration state, the first valve body 311 and the second valve body 321 are closed, the first pump unit 34 and the second pump unit 35 are both open, and the third pump unit 36 is open , the liquid flow path of the refrigeration system is as shown in FIG. 21 .

Embodiment four

Please refer to FIG. 22 , the structure and principle of the refrigeration system 10 provided by the fourth embodiment are the same as those of the refrigeration system 10 in the first embodiment, and the differences between the two are mainly described below.

In the refrigeration system 10 of the fourth embodiment, the number of the hybrid refrigeration device 30 and the heat dissipation unit 40 is at least two, and the refrigeration system 10 also includes a liquid supply loop 81 and a liquid return loop Pipeline 82, the multiple liquid inlet pipelines 31 of multiple hybrid refrigeration devices 30 are connected in parallel and connected to the refrigeration equipment via multiple third pump units 36 and the liquid supply ring pipeline 81 respectively. At the liquid outlet, the outlets of the liquid return pipelines 32 of the plurality of hybrid refrigeration devices 30 are connected in parallel and connected to the liquid inlet end of the refrigeration equipment through the liquid return annular pipeline 82 .

Through the connection method in the fourth embodiment, the number of the hybrid refrigeration module 10 and the heat dissipation unit 40 can be flexibly designed, and the pipeline connection redundancy of the hybrid refrigeration module 10 can be realized, so that the high reliability of the data center can be satisfied. The redundancy requirement of refrigeration avoids problems such as inability to dissipate heat in time due to failure of some of the hybrid refrigeration modules 10 .

Embodiment five

Referring to FIG. 23 , FIG. 23 is a schematic structural diagram of a storage medium according to an embodiment of the present application. The storage medium in the embodiment of the present application is a computer-readable storage medium, which stores a program file 91 capable of implementing all the above-mentioned methods, wherein the program file 91 can be stored in the above-mentioned computer-readable storage medium in the form of a software product, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned computer storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., which can store program codes. Media, or terminal devices such as computers, servers, mobile phones, and tablets.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The above is only the implementation mode of this application, and does not limit the scope of patents of this application. Any equivalent structure or equivalent process transformation made by using the contents of this application specification and drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present application in the same way.

Claims

A hybrid refrigeration device, characterized in that it comprises

A liquid inlet pipeline with a first valve body, the inlet of the liquid inlet pipeline is used to connect to the liquid outlet of the refrigeration equipment, and the outlet of the liquid inlet pipeline is used to connect to the liquid inlet of the cooling unit;

A liquid return line with a second valve body, the inlet of the liquid return line is used to connect to the liquid outlet of the cooling unit, and the outlet of the liquid return line is used to connect to the liquid inlet of the refrigeration device ;

A liquid-cooled refrigerator has an evaporator liquid outlet, an evaporator liquid inlet, a condenser liquid outlet, and a condenser liquid inlet, the condenser liquid inlet is connected to the inlet of the liquid inlet pipeline, and the condenser The liquid outlet of the evaporator is used to connect the outlet of the liquid inlet pipeline and the liquid inlet of the heat dissipation unit; the liquid inlet of the evaporator is connected to the inlet of the liquid return pipeline and the inlet of the heat dissipation unit, so The liquid outlet of the evaporator is used to connect the outlet of the liquid return line with the liquid inlet of the refrigeration equipment;

A first pump unit, the first pump unit is located between the condenser liquid inlet and the inlet of the liquid inlet pipeline or between the condenser liquid outlet and the outlet of the liquid inlet pipeline ;

A second pump unit, the second pump unit is located between the liquid inlet of the evaporator and the inlet of the liquid return line or between the liquid outlet of the evaporator and the outlet of the liquid return line ;

Wherein, the hybrid refrigeration device can be switched between a natural cooling state and a hybrid refrigeration state,

In the natural cooling state, when the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the first external temperature of the current external environment, the first valve body and the second valve body are connected, and the first pump unit and the second pump unit are both closed, the liquid at the liquid outlet of the refrigeration equipment is supplied to the liquid inlet of the heat dissipation unit through the first valve body, and after being radiated by the heat dissipation unit, it passes through the return The liquid pipeline is provided to the liquid inlet end of the refrigeration equipment, and the temperature of the liquid at the liquid inlet end of the refrigeration equipment is a second temperature value, and the second temperature value is greater than the first ambient temperature and lower than the first external temperature value. temperature value;

In the mixed refrigeration state, the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the second external temperature of the current external environment, the liquid-cooled refrigerator is turned on, and the first valve body and the second valve body The body is closed, the first pump unit and the second pump unit are both turned on, and the liquid at the first temperature value at the liquid outlet end of the refrigeration equipment is converted into liquid at the third temperature value by the condenser Provided to the liquid inlet of the heat dissipation unit, the liquid converted into the fourth temperature value after the heat dissipation of the heat dissipation unit is provided to the liquid inlet of the evaporator, and converted to have the second temperature by the evaporator Liquid at a temperature value is provided to the liquid inlet end of the refrigeration device, wherein the second external temperature is greater than the first external temperature, and the first temperature value is greater than the second external temperature and lower than the first external temperature Three temperature values, the fourth temperature value is greater than the second external temperature and less than the third temperature value.
The hybrid refrigeration device according to claim 1, wherein there are at least two of the first pump unit, the second pump unit, the liquid-cooled cooler, and the heat dissipation unit, and the inlet The number of the liquid pipeline and the liquid return pipeline is two and connected in parallel with each other, each of the first pump unit, each of the second pump unit, and each of the liquid-cooled chillers form a liquid-cooled module , the liquid inlets of each of the heat dissipation units are connected together and are connected to the outlets of the two liquid inlet pipelines, the liquid outlets of each of the heat dissipation units are connected together and are connected to the inlet of the liquid return pipeline , the outlets of each of the liquid return lines are used to connect to the liquid inlet of the refrigeration equipment, the liquid outlets of each of the condensers are connected to the outlets of the two liquid inlet lines, and the inlets of each of the condensers The liquid inlet is connected to the inlet of the liquid inlet pipeline and the liquid outlet of the refrigeration equipment, and the liquid inlet of each evaporator is connected to the inlet of the two liquid return pipelines and the outlet of each heat dissipation unit. Between the liquid ports, each liquid outlet of the evaporator is connected to the outlets of the two liquid return pipelines so as to be connected to the liquid inlet port of the refrigeration device.
The hybrid refrigeration device according to claim 1, characterized in that, the inlet of the liquid inlet line and the liquid outlet of the refrigeration equipment are also used to connect the third pump unit or the outlet of the liquid return line A third pump unit is also connected to the liquid inlet end of the refrigeration equipment, and the third pump unit is turned on in both the natural cooling state and the mixed refrigeration state.
The hybrid refrigeration device according to claim 1, characterized in that, the hybrid refrigeration device further comprises a controller, the controller is used to receive an external signal or a trigger signal to control when the hybrid refrigeration device is in the natural cooling state or The hybrid refrigeration state or the controller is used to control the hybrid refrigeration device to be in the natural cooling state or the hybrid refrigeration state according to the acquired current external temperature.
The hybrid refrigeration device according to claim 1, wherein the hybrid refrigeration device further comprises a cold storage module, the cold storage module includes a cold storage tank, a fourth pump unit and at least one regulating valve, and the liquid inlet of the cold storage tank connected to the liquid outlet of the evaporator, the liquid outlet of the cold storage tank is connected to the liquid inlet of the evaporator via the fourth pump unit,

The at least one regulating valve is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the liquid inlet of the cold storage tank, the liquid outlet of the cold storage tank and the fourth pump unit , the outlet of the liquid return line; or the at least one regulating valve includes a first two-way valve and a second two-way valve, and the first two-way valve is connected between the liquid inlet of the cold storage tank and the Between the outlets of the liquid return line, the second two-way valve is connected between the first two-way valve and the outlet of the liquid return line and between the liquid outlet of the cold storage tank and the second two-way valve. Between the four pump units,

When the hybrid refrigeration device is in the natural cooling state and the valley power period, both the first pump unit and the fourth pump unit are turned on, the second pump unit is turned off, and the liquid-cooled refrigerator is turned on, so The liquid outlet of the evaporator provides liquid with a fifth temperature value to charge the cold storage tank, and the liquid at the liquid outlet of the cold storage tank passes through the fourth pump unit to the liquid inlet of the evaporator until the The liquid temperature of the cold storage tank reaches the fifth temperature value, and the fifth temperature value is not higher than the second temperature value;

When the hybrid refrigeration device is in the peak power period, the second pump unit is turned on, the first pump unit and the fourth pump unit are both turned off, and the liquid temperature at the liquid outlet of the evaporator is the sixth temperature value , the sixth temperature value is greater than the second temperature value, by controlling the opening degree of the regulating valve, the liquid at the liquid outlet of the cold storage tank is mixed with the liquid at the liquid outlet of the evaporator to have the required The liquid at the second temperature value is provided to the outlet of the liquid return line to be provided to the liquid inlet port of the refrigeration device.
The hybrid refrigeration device according to claim 1, wherein the heat dissipation unit comprises a heat dissipation fan,

In the natural cooling state, when the temperature of the outlet liquid after heat dissipation by the heat dissipation unit is lower than the second temperature value, the hybrid refrigeration device controls the speed of the heat dissipation fan to decrease until the liquid temperature after heat dissipation by the heat dissipation unit the liquid temperature is equal to said second temperature value;

In the natural cooling state, when the outlet liquid temperature after the heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan does not reach the maximum threshold, the hybrid refrigeration device controls the heat dissipation fan The rotation speed is increased until the temperature of the liquid after heat dissipation by the heat dissipation unit is equal to the second temperature value;

In the natural cooling state, when the temperature of the outlet liquid after heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan has reached the maximum threshold, the hybrid refrigeration device controls to enter the cooling state.
The hybrid refrigeration device according to claim 1, wherein at least one of the first valve body and the second valve body is a one-way check valve.
A refrigerating system, characterized by comprising the hybrid refrigerating device according to claim 2, the refrigerating equipment and the heat dissipation unit.
A refrigerating system, characterized by comprising the hybrid refrigerating device according to any one of claims 1, 3-7, the refrigerating equipment and the heat dissipation unit.
The refrigerating system according to claim 9, wherein the number of the hybrid refrigerating device and the heat dissipation unit is at least two, and the refrigerating system further comprises a liquid supply annular pipeline and a liquid return annular pipeline, A plurality of the mixed refrigeration devices and a plurality of the liquid inlet pipelines are connected to the liquid outlet of the refrigeration equipment through the liquid supply annular pipeline, and the outlets of the liquid return pipelines of the multiple mixed refrigeration devices are connected in parallel And the liquid inlet end of the refrigeration equipment is connected through the liquid return annular pipeline.
A method for controlling a refrigeration system, the refrigeration system comprising a liquid inlet pipeline with a first valve body, a liquid return pipeline with a second valve body, a first pump unit, a second pump unit, a liquid-cooled refrigerator, A heat dissipation unit and a refrigeration device, the liquid-cooled refrigerator has an evaporator liquid outlet, an evaporator liquid inlet, a condenser liquid outlet, and a condenser liquid inlet, and the first pump unit is located at the condenser liquid inlet Between the inlet of the liquid inlet and the inlet of the liquid inlet or between the outlet of the condenser and the outlet of the inlet of the liquid; the second pump unit is located between the inlet of the evaporator and the outlet of the inlet of the liquid Between the inlets of the liquid return line or between the liquid outlet of the evaporator and the outlet of the liquid return line, the control method includes the following steps:

In the natural cooling state, the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the first ambient temperature of the current outside, the first valve body and the second valve body are connected, and the first pump unit and the second pump unit are both closed, the liquid at the liquid outlet of the refrigeration equipment is supplied to the liquid inlet of the heat dissipation unit through the liquid inlet pipeline, and after being radiated by the heat dissipation unit, it passes through the liquid return The pipeline is provided to the liquid inlet end of the refrigeration equipment, and the temperature of the liquid at the liquid inlet end of the refrigeration equipment is a second temperature value, and the second temperature value is greater than the first external temperature and lower than the first temperature value;

In the mixed refrigeration state, the first temperature value of the liquid outlet end of the refrigeration equipment is greater than the second external temperature of the current external environment, the liquid-cooled refrigerator is turned on, and the first valve body and the second valve body The body is turned off, the first pump unit and the second pump unit are both turned on, and the liquid at the first temperature value at the liquid outlet end of the refrigeration equipment is converted into liquid at the third temperature value by the condenser Provided to the liquid inlet of the heat dissipation unit, the liquid converted into the fourth temperature value after the heat dissipation of the heat dissipation unit is provided to the liquid inlet of the evaporator, and converted to have the second temperature by the evaporator Liquid at a temperature value is provided to the liquid inlet end of the refrigeration device, wherein the second external temperature is greater than the first external temperature, and the first temperature value is greater than the second external temperature and lower than the first external temperature Three temperature values, the fourth temperature value is greater than the second external temperature and less than the third temperature value.
The control method according to claim 11, characterized in that, the control method further comprises the following steps: receiving an external signal or a trigger signal to control the natural cooling state or the mixed cooling state; or obtaining the current external temperature, Controlling to be in the natural cooling state or the mixed refrigeration state according to the current external temperature.
The control method according to claim 11, wherein the hybrid refrigeration module further includes a cold storage module, the cold storage module includes a cold storage tank, a fourth pump unit and at least one regulating valve, and the liquid inlet of the cold storage tank connected to the liquid outlet of the evaporator, the liquid outlet of the cold storage tank is connected to the liquid inlet of the evaporator via the fourth pump unit,

The at least one regulating valve is a three-way valve, and the three valve ports of the three-way valve are respectively connected to the liquid inlet of the cold storage tank, the liquid outlet of the cold storage tank and the fourth pump unit , the outlet of the liquid return line; or the at least one regulating valve includes a first two-way valve and a second two-way valve, and the first two-way valve is connected between the liquid inlet of the cold storage tank and the Between the outlets of the liquid return line, the second two-way valve is connected between the first two-way valve and the outlet of the liquid return line and between the liquid outlet of the cold storage tank and the second two-way valve. Between the four pump units, the control method also includes the steps of:

When the hybrid refrigeration device is in the natural cooling state and the valley power period, both the first pump unit and the fourth pump unit are turned on, the second pump unit is turned off, and the liquid-cooled refrigerator is turned on, so The liquid outlet of the evaporator provides liquid with a fifth temperature value to charge the cold storage tank, and the liquid at the liquid outlet of the cold storage tank passes through the fourth pump unit to the liquid inlet of the evaporator until the The liquid temperature of the cold storage tank reaches the fifth temperature value, and the fifth temperature value is not higher than the second temperature value;

When the hybrid refrigeration device is in the peak power period, the second pump unit is turned on, the first pump unit and the fourth pump unit are both turned off, and the liquid temperature at the liquid outlet of the evaporator is the sixth temperature value , the sixth temperature value is greater than the second temperature value, by controlling the opening degree of the regulating valve, the liquid at the liquid outlet of the cold storage tank is mixed with the liquid at the liquid outlet of the evaporator to have the required The liquid at the second temperature value is provided to the outlet of the liquid return line to be provided to the liquid inlet port of the refrigeration device.
The control method according to claim 11, wherein the heat dissipation unit includes a heat dissipation fan, and the control method further comprises the following steps:

In the natural cooling state, when the outlet liquid temperature after heat dissipation by the heat dissipation unit is lower than the second temperature value, control the speed of the heat dissipation fan to decrease until the liquid temperature after heat dissipation by the heat dissipation unit is equal to the second temperature value. second temperature value;

In the natural cooling state, when the temperature of the outlet liquid after heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan does not reach the maximum threshold, control the speed of the heat dissipation fan to increase to The temperature of the liquid after heat dissipation by the heat dissipation unit is equal to the second temperature value;

In the natural cooling state, when the temperature of the outlet liquid after heat dissipation by the heat dissipation unit is higher than the second temperature value and the speed of the heat dissipation fan has reached a maximum threshold, control enters into the mixed refrigeration state.
A computer-readable storage medium, characterized in that the computer-readable storage medium includes a control method program for a hybrid refrigeration device of a refrigeration system, and when the control method program for a hybrid refrigeration device of a refrigeration system is executed by a processor, The control method of the hybrid refrigeration device of the refrigeration system according to any one of claims 10 to 14 is realized.