Refrigerating system and refrigerating method
By using an ejector device in the refrigeration system to provide the power to drive the flow of refrigerant, the problem of high energy consumption in existing cold source systems is solved, and energy consumption is reduced.
Patent Information
- Application Number
- CN202410718258.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-12-05
AI Technical Summary
Existing cold source systems require a significant amount of energy input to drive power equipment such as pumps and compressors during the refrigeration process, resulting in high energy consumption.
The system employs a refrigeration system, including a generator, an ejector device, a condenser, an evaporator, and a liquid receiver. The ejector device's ejection action provides the power to drive the refrigerant fluid, thus avoiding the energy consumption of power equipment and reducing the energy consumption of the refrigeration system.
The ejector device provides the power to drive the refrigerant flow, saving energy consumption of power equipment and reducing the energy consumption of the refrigeration system.
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Figure CN121067480A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of refrigeration equipment, in particular to a refrigeration system and a refrigeration method. BACKGROUND
[0002] A cold source system is a system capable of providing cooling and temperature reduction for a target space (for example, a data center room, etc.), and has been increasingly widely applied to various technical fields. Taking a data center room as an example, the cold source system of the data center room usually needs to meet the requirement that the overall PUE (Power Usage Effectiveness) is not more than a preset value (for example, 1.3), wherein the PUE represents the ratio of all energy consumed by the data center to the energy consumed by the Internet technology (IT) load, and the value is closer to 1, the better. With the rapid development of data center computing power, the consumption of electric energy by the data center is also increasing, and the demand for reducing the energy consumption of the cold source system is becoming more and more urgent.
[0003] In order to improve the operation energy efficiency of the cold source system, various refrigeration modes aiming to reduce the PUE are adopted in the related art, for example, the cold source system in the related art adopts liquid cooling, evaporative cooling and other refrigeration modes to achieve refrigeration and temperature reduction for the target space, but the refrigeration mode of these cold source systems still needs more additional energy input to drive the power equipment such as pumps and compressors to provide driving flow power for the refrigerant fluid in the cold source system, so the energy consumption is high.
[0004] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. SUMMARY
[0005] The main purpose of the present application is to provide a refrigeration system and a refrigeration method, aiming to at least partially solve the technical problem that the temperature reduction mode of the cold source system in the related art needs more additional energy input to drive the power equipment to provide driving flow power for the refrigerant fluid, resulting in high energy consumption.
[0006] According to an aspect of an embodiment of the present application, a refrigeration system is provided, comprising a generator, an ejector device, a condenser, an evaporator and a liquid storage device, an outlet end of the generator is connected to an inlet end of the ejector device, an outlet end of the ejector device is connected to an inlet end of the condenser, an outlet end of the condenser is respectively connected to an inlet end of the evaporator and an inlet end of the liquid storage device, an outlet end of the evaporator is connected to an inlet end of the ejector device, and an outlet end of the liquid storage device is connected to an inlet end of the generator.
[0007] In some embodiments of the present application, the ejector device comprises a first ejector group and a second ejector group, an outlet end of the first ejector group is connected to an inlet end of the second ejector group, an outlet end of the evaporator is connected to an inlet end of the first ejector group, and outlet ends of the generators are respectively connected to inlet ends of the first ejector group and the second ejector group.
[0008] In some embodiments of the present application, any one of the first ejector group and the second ejector group comprises one ejector or a plurality of parallel-connected ejectors.
[0009] In some embodiments of the present application, the refrigeration system further comprises a control device connected to the evaporator and the generators respectively.
[0010] In some embodiments of the present application, the refrigeration system further comprises a compressor and a first valve connected to the control device respectively, the first valve is arranged on a pipeline between the ejector device and the condenser, and the compressor is connected to the first valve in parallel.
[0011] In some embodiments of the present application, the refrigeration system further comprises a temperature sensor connected to the control device, the temperature sensor is used to detect an ambient temperature in the target space.
[0012] In some embodiments of the present application, the liquid storage device comprises a first liquid storage container and a second liquid storage container connected in parallel, an inlet end of the first liquid storage container and an inlet end of the second liquid storage container are respectively connected to an outlet end of the condenser, and an outlet end of the first liquid storage container and an outlet end of the second liquid storage container are respectively connected to inlet ends of the generators.
[0013] In some embodiments of the present application, a liquid level sensor connected to the control device is arranged in each of the first liquid storage container and the second liquid storage container.
[0014] In some embodiments of the present application, a valve is arranged on a pipeline between the condenser and the liquid storage device, and / or a valve is arranged on a pipeline between the liquid storage device and the generators.
[0015] In some embodiments of the present application, the refrigeration system further comprises a throttling valve connected to the control device, the throttling valve is arranged on a pipeline between the condenser and the evaporator.
[0016] In some embodiments of the present application, the refrigeration system further comprises a heat recovery pipeline arranged in the generator, and first and second ends of the heat recovery pipeline extend out of the generator.
[0017] According to another aspect of the embodiments of the present application, a refrigeration method is provided, which is applied to the refrigeration system of any of the embodiments of the present application, and the refrigeration method comprises:
[0018] The refrigerant liquid of the generator absorbs heat of the refrigeration fluid from the target space to evaporate to form first refrigerant vapor;
[0019] The ejector device injects the mixed gas to the condenser; the mixed gas comprises the gas from the generator and the gas from the evaporator, and the gas from the generator comprises the first refrigerant vapor;
[0020] The condenser cools the mixed gas to obtain refrigerant liquid;
[0021] Part of the refrigerant liquid flows into the evaporator, and the remaining part of the refrigerant liquid flows into the liquid storage device;
[0022] The refrigerant liquid in the evaporator absorbs heat of the refrigeration fluid after absorbing heat by the generator to generate second refrigerant vapor; the gas from the evaporator comprises the second refrigerant vapor;
[0023] The refrigerant liquid in the liquid storage device is input into the generator;
[0024] The refrigeration fluid cooled by the evaporator is input into the target space.
[0025] In the technical scheme of the embodiments of the present application, the refrigeration system comprises a generator, an ejector device, a condenser, an evaporator and a liquid storage device, the outlet end of the generator is connected to the inlet end of the ejector device, the outlet end of the ejector device is connected to the inlet end of the condenser, the outlet end of the condenser is connected to the inlet end of the evaporator and the inlet end of the liquid storage device respectively, the outlet end of the evaporator is connected to the inlet end of the ejector device, and the outlet end of the liquid storage device is connected to the inlet end of the generator, the refrigeration system utilizes the injection effect of the ejector device to provide power for driving the flow of refrigerant fluid, thereby saving the operation energy consumption of the power equipment and reducing the energy consumption of the refrigeration system. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.
[0027] Figure 1 The structural schematic diagram of the refrigeration system of one embodiment of the present application.
[0028] Figure 2 Structure diagram of a refrigeration system according to another embodiment of the application.
[0029] Figure 3 Structure diagram of an ejector group according to an embodiment of the application.
[0030] Figure 4 Structure diagram of a refrigeration system according to another embodiment of the application.
[0031] BRIEF DESCRIPTION OF DRAWINGS
[0032]
[0033]
[0034] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.
[0036] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.
[0037] In addition, the description such as "first", "second" and the like in the application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0038] In this application, unless specifically defined otherwise, the terms "connected", "fixed", and the like should be construed broadly and, for example, can mean fixedly connected, removably connected, or integrally formed; can mean mechanical connected, electrical connected, or the like; can mean directly connected, or connected through an intermediate medium; can mean an internal connection between two elements, or an interaction relationship between two elements; unless specifically defined otherwise. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.
[0040] Similar to the scenario of a data center, cooling is needed to avoid the temperature of the equipment in the scenario being too high to affect the normal operation of the equipment. The cold source system in the related art adopts a refrigeration mode such as liquid cooling and evaporative cooling on the target space to realize refrigeration and cooling of the target space, for example, a water cooling pipeline is used to cool the servers and other equipment in the data center room, or a cold air input mode is used to cool the data center room. The refrigeration mode of the cold source system in the related art needs more energy input to drive power equipment such as pumps and compressors to provide power for the refrigerant fluid (such as gas, liquid, etc.) in the cold source system to drive its flow, and the energy consumption is high.
[0041] In view of the defects in the related art, the present application provides a refrigeration system, which includes a generator, an ejector device, a condenser, an evaporator, and a liquid storage device. The outlet end of the generator is connected to the inlet end of the ejector device. The outlet end of the ejector device is connected to the inlet end of the condenser. The outlet end of the condenser is respectively connected to the inlet end of the evaporator and the inlet end of the liquid storage device. The outlet end of the evaporator is connected to the inlet end of the ejector device. The outlet end of the liquid storage device is connected to the inlet end of the generator. The refrigeration system utilizes the entraining action of the ejector device to provide power to drive the flow of the refrigerant fluid, thereby saving the operating energy consumption of the power equipment and reducing the energy consumption of the refrigeration system.
[0042] The refrigeration system of the present application has good universality and can be applied to high-temperature heat source scenarios such as data centers, etc., for cooling the heat source application scenarios. The refrigeration system is simple to operate, easy to implement refrigeration operation, and has low cost.
[0043] Reference Figure 1As shown, one embodiment of the present application provides a refrigeration system, which includes a generator, an ejector device, a condenser, an evaporator and a liquid storage device, an outlet end of the generator is connected to an inlet end of the ejector device, an outlet end of the ejector device is connected to an inlet end of the condenser, an outlet end of the condenser is connected to an inlet end of the evaporator and an inlet end of the liquid storage device respectively, an outlet end of the evaporator is connected to an inlet end of the ejector device, and an outlet end of the liquid storage device is connected to an inlet end of the generator.
[0044] A fluid pipe is connected between the fluid outlet and the fluid inlet of the target space, a first end of the fluid pipe is connected to the fluid outlet of the target space, a second end of the fluid pipe is connected to the fluid inlet of the target space, the fluid pipe passes through the generator and the evaporator, a pipe section of the fluid pipe inside the generator exchanges heat with the refrigerant inside the generator, and a pipe section of the fluid pipe inside the evaporator exchanges heat with the refrigerant inside the evaporator. The fluid output from the fluid outlet of the target space enters the fluid pipe, and flows into the fluid inlet of the target space through the fluid pipe, the fluid absorbs heat from the refrigerant inside the generator when flowing through the pipe section inside the generator, and the fluid absorbs heat from the refrigerant inside the evaporator when flowing through the pipe section inside the evaporator, so that the temperature of the fluid input into the fluid inlet is low, and the fluid can cool the target space after entering the target space. The target space includes but is not limited to a data center room, and the servers and other electronic equipment in the data center room generate a large amount of heat and need to be cooled to maintain normal operation. The refrigerant includes but is not limited to refrigerant. The fluid in the fluid pipe includes but is not limited to gas flow, liquid flow, etc., for example, the gas flow can be air flow, and the liquid flow can be water flow, etc.
[0045] The refrigerant liquid of the generator absorbs heat from the fluid in the fluid pipe, and evaporates to form first refrigerant vapor, the ejector device injects mixed gas to the condenser, wherein the mixed gas includes gas from the generator and gas from the evaporator, and the gas from the generator includes the first refrigerant vapor; the condenser cools the mixed gas to obtain refrigerant liquid, part of the refrigerant liquid flows into the evaporator, and the remaining part of the refrigerant liquid flows into the liquid storage device; the refrigerant liquid in the evaporator absorbs heat from the refrigeration fluid absorbed heat by the generator, to generate second refrigerant vapor; the gas from the evaporator includes the second refrigerant vapor; the refrigerant liquid in the liquid storage device is input into the generator, and the refrigeration fluid cooled by the evaporator is input into the target space to cool the target space.
[0046] The refrigerant fluid output in the target space is then returned to the target space through the fluid pipe, and the fluid in the fluid pipe is cooled by the generator and the evaporator of the refrigeration system in sequence. In this way, the heat of the fluid in the fluid pipe is recovered by the generator and the evaporator. The heat recovered by the generator heats the refrigerant liquid of the generator to form first refrigerant vapor. A pressure difference is formed between the generator and the ejector device. The gas pressure of the generator is greater than the gas pressure of the ejector device. The gas containing the first refrigerant vapor flows to the ejector device under the action of the pressure difference. When the high-pressure gas flows through the ejector, a high-speed gas flow is generated. The ejector device can use the gas pressure difference (the gas pressure at the outlet of the ejector is lower than the gas pressure at the inlet) to generate an induction effect to drive the gas flow in the pipe. No additional power source is needed to drive the gas flow in the refrigeration system. Thus, no power device needs to be additionally provided for the refrigeration system and operated to form a driving force for driving the refrigerant fluid flow. Therefore, the energy consumption of the refrigeration device is reduced.
[0047] With reference to Figure 2 In the example shown, the ejector device can include a first ejector group and a second ejector group. The outlet end of the first ejector group is connected to the inlet end of the second ejector group. The outlet end of the evaporator is connected to the inlet end of the first ejector group. The outlet end of the generator is connected to the inlet end of the first ejector group and the inlet end of the second ejector group, respectively.
[0048] For example, any of the first ejector group and the second ejector group can include one ejector or a plurality of parallel-connected ejectors. With reference to Figure 3 In the example shown, Figure 3 In the example shown, the ejector group includes N parallel-connected ejectors: a first ejector, a second ejector,..., and an Nth ejector, where N is an integer greater than 1, A is the inlet end of the ejector group, and B is the outlet end of the ejector group.
[0049] In some embodiments, the refrigeration system can further include a control device connected to the evaporator and the generator, respectively. The control device includes but is not limited to a single-chip microcomputer and the like.
[0050] In some embodiments, the refrigeration system further includes a compressor and a first valve connected to the control device, respectively. The first valve is arranged on the pipe between the ejector device and the condenser, and the compressor is connected in parallel with the first valve. The first valve includes but is not limited to a solenoid valve.
[0051] The compressor is used as a backup power device. When the refrigerant flow power is insufficient, the control device controls the first valve to be closed and the compressor to be started. The compressor compresses the gas from the ejector device and inputs the compressed gas into the condenser, thereby increasing the refrigerant flow power and relieving the insufficient refrigerant flow power to a certain extent.
[0052] In some embodiments, the refrigeration system further comprises a temperature sensor connected to the control device, which is used to detect the ambient temperature in the target space.
[0053] When the ambient temperature in the target space is high (e.g., exceeds a preset temperature threshold), the refrigeration system needs to speed up the refrigerant flow to improve the efficiency of delivering refrigeration fluid to the target space. At this time, greater refrigerant flow driving power is needed. The control device can control the first valve to be closed and the compressor to be started. The compressor compresses the gas from the ejector device and inputs the compressed gas into the condenser, thereby increasing the refrigerant flow power and improving the efficiency of delivering refrigeration fluid to the target space.
[0054] Exemplarily, the liquid storage device comprises a first liquid storage container and a second liquid storage container connected in parallel. The inlet end of the first liquid storage container and the inlet end of the second liquid storage container are respectively connected to the outlet end of the condenser. The outlet end of the first liquid storage container and the outlet end of the second liquid storage container are respectively connected to the inlet end of the generator.
[0055] Exemplarily, the first liquid storage container is provided with a first liquid level sensor connected to the control device. The second liquid storage container is provided with a second liquid level sensor connected to the control device. The pipeline between the condenser and the liquid storage device is provided with a valve connected to the control device, and / or the pipeline between the liquid storage device and the generator is provided with a valve connected to the control device.
[0056] The control device receives the first liquid level detection value from the first liquid level sensor and the second liquid level detection value from the second liquid level sensor, and compares the first liquid level detection value and the second liquid level detection value with a preset liquid level value respectively.
[0057] If only one of the first liquid level detection value and the second liquid level detection value is a high liquid level value, which is a liquid level detection value greater than the preset liquid level value, the control is such that the storage container corresponding to the high liquid level value inputs the refrigerant liquid into the generator and the control is such that the condenser stops inputting the refrigerant liquid into the storage container corresponding to the high liquid level value, the control is such that the other storage container stops inputting the refrigerant liquid into the generator and the control is such that the condenser inputs the refrigerant liquid into the storage container. In this way, the storage container with the high liquid level value inputs the refrigerant liquid into the generator, avoiding too much refrigerant liquid in the storage container with the high liquid level value, so that the refrigerant liquid in the two storage containers does not exceed the preset liquid level value as much as possible.
[0058] If both the first liquid level detection value and the second liquid level detection value are high liquid level values or neither of them is a high liquid level value, the control is such that the greater value between the first liquid level detection value and the second liquid level detection value is determined, the control is such that the storage container corresponding to the greater value inputs the refrigerant liquid into the generator and the control is such that the condenser stops inputting the refrigerant liquid into the storage container corresponding to the greater value, the control is such that the other storage container stops inputting the refrigerant liquid into the generator and the control is such that the condenser inputs the refrigerant liquid into the storage container. In this way, the storage container with the higher liquid level inputs the refrigerant liquid into the generator, thereby avoiding a large difference between the liquid levels in the two storage containers.
[0059] In a specific example, the pipeline between the condenser and the liquid storage device includes a first branch pipeline and a second branch pipeline, and the pipeline between the liquid storage device and the generator includes a third branch pipeline and a fourth branch pipeline; a first end of the first branch pipeline is connected to an inlet of the first storage container, and a second end of the first branch pipeline is in communication with the condenser; a first end of the second branch pipeline is connected to an inlet of the second storage container, and a second end of the second branch pipeline is in communication with the condenser; a first end of the third branch pipeline is connected to an outlet of the first storage container, and a second end of the third branch pipeline is in communication with the generator; a first end of the fourth branch pipeline is connected to an outlet of the second storage container, and a second end of the fourth branch pipeline is in communication with the generator; valves connected to the control device are provided on the first branch pipeline, the second branch pipeline, the third branch pipeline, and the fourth branch pipeline. The valves in this embodiment include but are not limited to solenoid valves, and the valves on each pipeline can be connected to the control device. The control device controls the opening and closing of the valves to realize the control of the condenser inputting the refrigerant liquid into the first storage container and the second storage container, and to realize the control of the first storage container and the second storage container inputting the refrigerant liquid into the generator. For example, the control device can alternately control the first storage container and the second storage container to input the refrigerant liquid into the generator, and alternately control the condenser to input the refrigerant liquid into the first storage container and the second storage container, so that the liquid level difference between the first storage container and the second storage container is kept within a smaller range.
[0060] In some embodiments, the refrigeration system can further comprise a throttling valve connected to the control device, the throttling valve being arranged in the pipeline between the condenser and the evaporator.
[0061] The control device controls the flow of refrigerant liquid in the pipeline between the condenser and the evaporator by controlling the opening degree of the throttling valve.
[0062] In some embodiments, the refrigeration system can further comprise a heat recovery pipeline arranged in the generator and having a first end and a second end both extending out of the generator. The heat recovery pipeline is used for passing a fluid containing waste heat, for example, the fluid containing waste heat flows into the first end and flows out of the second end, so as to provide heat energy for the generator to heat the refrigerant vapor in the generator, further provide power to drive the flow of refrigerant in the refrigeration system, and recover waste heat and reduce energy waste. The fluid containing waste heat includes, but is not limited to, industrial wastewater with high temperature and the like.
[0063] Referring to the drawings, a specific example of a refrigeration system is shown, which comprises a generator 1, a first ejector 2, a second ejector 3, a condenser 4, an evaporator 5, a first liquid storage container 6, a second liquid storage container 7 and a compressor 8. The outlet end of the generator 1 is connected to the inlet end of the first ejector 2 and the inlet end of the second ejector 3 respectively. The outlet end of the first ejector 2 is connected to the inlet end of the second ejector 3. The outlet end of the evaporator 5 is connected to the inlet end of the first ejector 2. The outlet end of the second ejector 2 is connected to the inlet end of the condenser 4. The outlet end of the condenser 4 is connected to the inlet end of the evaporator 5. The inlet end of the first liquid storage container 6 and the inlet end of the second liquid storage container 7 are connected to the outlet end of the condenser 4 respectively. The outlet end of the first liquid storage container 6 and the outlet end of the second liquid storage container 7 are connected to the inlet end of the generator 1 respectively. An electromagnetic valve 9 is arranged in the pipeline between the outlet end of the second ejector 2 and the inlet end of the condenser 4. The compressor 8 is connected in parallel to the electromagnetic valve 9.
[0064] The pipeline between the condenser 4 and the first liquid storage container 6 and the second liquid storage container 7 comprises a first main pipeline 17, a first branch pipeline 18 and a second branch pipeline 19, wherein the first end of the first branch pipeline 18 is connected to the inlet of the first liquid storage container 6, the second end of the first branch pipeline 18 is connected to the first main pipeline 17, and the first main pipeline 17 is communicated with the outlet end of the condenser 4; the first end of the second branch pipeline 19 is connected to the inlet of the second liquid storage container 7, the second end of the second branch pipeline 19 is connected to the first main pipeline 17, and the first main pipeline 17 is communicated with the outlet end of the condenser 4; the pipeline between the generator 1 and the first liquid storage container 6 and the second liquid storage container 7 comprises a second main pipeline 20, a third branch pipeline 21 and a fourth branch pipeline 22, the first end of the third branch pipeline 21 is connected to the outlet of the first liquid storage container 6, the second end of the third branch pipeline 21 is connected to the second main pipeline 20, and the second main pipeline 20 is communicated with the generator 1; the first end of the fourth branch pipeline 22 is connected to the outlet of the second liquid storage container 7, the second end of the fourth branch pipeline 22 is connected to the second main pipeline 20, and the second main pipeline 20 is communicated with the generator 1; the pipeline between the condenser 4 and the evaporator 5 comprises the first main pipeline 17 and a fifth branch pipeline 23, the first end of the fifth branch pipeline 23 is connected to the first main pipeline 17, the first main pipeline 17 is communicated with the outlet end of the condenser 4, and the second end of the fifth branch pipeline 23 is connected to the inlet end of the evaporator 5. The first branch pipeline 18 is provided with an electromagnetic valve 11, the second branch pipeline 19 is provided with an electromagnetic valve 13, the third branch pipeline 21 is provided with an electromagnetic valve 12, the fourth branch pipeline 22 is provided with an electromagnetic valve 14, and the fifth branch pipeline 23 is provided with a throttle valve 15. The electromagnetic valve 11, the electromagnetic valve 13, the electromagnetic valve 12, the electromagnetic valve 14 and the throttle valve 15 are connected to the control device, and the control device 10 controls the opening and closing of the electromagnetic valve 11, the electromagnetic valve 13, the electromagnetic valve 12, the electromagnetic valve 14 and the throttle valve 15.
[0065] The equipment liquid cooling pipeline 24 of the data center machine room includes a first part located inside the data center machine room and a second part located outside the data center machine room, the pipeline of the second part passes through the generator 1 and the evaporator 5, and the flow direction of the refrigerant in the pipeline of the second part is from the A end to the B end. After the refrigerant in the equipment liquid cooling pipeline 24 flows out of the data center machine room, it first enters the generator 1 of the refrigeration system through the pipeline of the second part, is cooled by the refrigerant liquid in the generator 1, and then enters the evaporator 5 to be further cooled by the refrigerant liquid in the evaporator 5. The refrigerant cooled twice is transported to the data center machine room by the pipeline of the second part, and cools and reduces the temperature of the equipment in the machine room through the pipeline of the first part. The refrigerant liquid in the generator 1 is heated by the refrigerant to generate high-temperature and high-pressure steam, which enters the first ejector 2 and the second ejector 3. The first ejector 2 injects the gas containing the refrigerant steam output from the evaporator 5, and the second ejector 3 injects the gas output from the first ejector 2. The injection of the ejector provides the main power to drive the flow of the refrigerant in the pipeline of the refrigeration system, which is sufficient to drive the flow of the refrigerant in the pipeline of the refrigeration system, thereby reducing the energy consumption of the entire refrigeration system. Under normal working conditions, the electromagnetic valve 5 is always open, the refrigerant output from the second ejector 3 is cooled by the external cooling fluid in the condenser 4 to form refrigerant liquid, at this time, one way of the refrigerant liquid flows into the evaporator 5 through the fifth branch pipeline 23 after being throttled by the throttle valve 15, and the other way of the refrigerant liquid flows into the generator 1 from the first liquid storage container 6 or the second liquid storage container 7. The first liquid storage container 6 and the second liquid storage container 7 alternately input the refrigerant liquid into the generator 1; specifically, when the electromagnetic valve 11 and the electromagnetic valve 14 are opened, the electromagnetic valve 12 and the electromagnetic valve 13 are closed, when the electromagnetic valve 12 and the electromagnetic valve 13 are opened, the electromagnetic valve 11 and the electromagnetic valve 14 are closed, when the electromagnetic valve 11 and the electromagnetic valve 14 are opened, the refrigerant liquid output from the condenser 4 flows into the first liquid storage container 6, and the refrigerant liquid in the second liquid storage container 7 flows into the generator 1 in turn through the fourth branch pipeline 22 and the second main pipeline 20, when the refrigerant liquid in the first liquid storage container 6 reaches a preset liquid level, the electromagnetic valve 1 and the electromagnetic valve 4 are closed, and the electromagnetic valve 2 and the electromagnetic valve 3 are opened, at this time, the refrigerant liquid output from the condenser 4 flows into the second liquid storage container 7, and the refrigerant liquid in the first liquid storage container 6 flows into the generator 1, and the operation is repeated alternately. The bottom ends of the first liquid storage container 6 and the second liquid storage container 7 are higher than the generator 1, and the gravity of the refrigerant liquid also provides the power to flow the refrigerant liquid in the first liquid storage container 6 and the second liquid storage container 7 into the generator 1.
[0066] The refrigeration system further comprises a heat recovery pipeline 16, which is arranged in the generator 1 and has a first end M and a second end N both extending out of the generator 1. The heat recovery pipeline 16 is used for flowing a fluid containing waste heat, for example, the fluid containing waste heat flows into the first end M and flows out of the second end N, so as to provide heat energy for the generator 1, heat the refrigerant vapor in the generator 1, further provide power for driving the refrigerant to flow in the refrigeration system, recover waste heat and reduce energy waste. The fluid containing waste heat includes, but is not limited to, industrial wastewater with high temperature and the like.
[0067] The refrigeration system of the example utilizes the entraining effect of the ejector device to provide power for driving the refrigerant fluid to flow, thereby saving the operation energy consumption of the power equipment, reducing the energy consumption of the refrigeration system, reducing the PUE of the data center, and the refrigeration system of the example has high energy efficiency and can make the PUE less than 1.1.
[0068] When it is detected that the temperature inside the data center room is too high, the condensing pressure needs to be increased, and then the standby compressor is controlled to be turned on and the electromagnetic valve 5 is controlled to be turned off. The standby compressor compresses the gas from the ejector device, so as to input the compressed gas into the condenser, increase the power for driving the refrigerant to flow, improve the efficiency of delivering refrigeration fluid to the target space, and quickly reduce the temperature inside the data center room.
[0069] The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be referred to each other, and will not be described herein for the sake of brevity.
[0070] Another embodiment of the present application provides a refrigeration method applied to the refrigeration system of any one of the embodiments of the present application, and the refrigeration method comprises the following steps.
[0071] The refrigerant liquid of the generator absorbs heat of the refrigeration fluid from the target space to evaporate to form first refrigerant vapor;
[0072] The ejector device entrains the mixed gas to the condenser; the mixed gas comprises the gas from the generator and the gas from the evaporator, and the gas from the generator comprises the first refrigerant vapor;
[0073] The condenser cools the mixed gas to obtain refrigerant liquid;
[0074] Part of the refrigerant liquid flows into the evaporator, and the remaining part of the refrigerant liquid flows into the liquid storage device;
[0075] The refrigerant liquid in the evaporator absorbs heat of the refrigeration fluid after absorbing heat by the generator to generate second refrigerant vapor; the gas from the evaporator comprises the second refrigerant vapor;
[0076] The refrigerant liquid in the liquid storage device is input into the generator;
[0077] The refrigerant fluid cooled by the evaporator is input into the target space.
[0078] The above description of various embodiments tends to emphasize the differences between various embodiments, and the same or similar parts can be referred to each other, and for the sake of brevity, will not be repeated here.
[0079] The refrigeration method of this embodiment uses the entraining effect of the ejector device to provide the power to drive the refrigerant fluid flow, thereby saving the operating energy consumption of the power equipment and reducing the energy consumption of the refrigeration system.
[0080] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the contents of the present application specification and drawings, or directly / indirectly applied in other related technical fields within the concept of the present application are included in the patent protection scope of the present application.
Claims
1. A refrigeration system characterized by, The refrigeration system comprises a generator, an ejector device, a condenser, an evaporator and a liquid storage device, an outlet end of the generator is connected to an inlet end of the ejector device, an outlet end of the ejector device is connected to an inlet end of the condenser, an outlet end of the condenser is connected to an inlet end of the evaporator and an inlet end of the liquid storage device respectively, an outlet end of the evaporator is connected to an inlet end of the ejector device, and an outlet end of the liquid storage device is connected to an inlet end of the generator.
2. The refrigeration system of claim 1, wherein, The ejector device comprises a first ejector group and a second ejector group, an outlet end of the first ejector group is connected to an inlet end of the second ejector group, an outlet end of the evaporator is connected to an inlet end of the first ejector group, and an outlet end of the generator is connected to an inlet end of the first ejector group and an inlet end of the second ejector group respectively.
3. The refrigeration system of claim 2, wherein, Any one of the first ejector group and the second ejector group comprises one ejector or a plurality of parallel-connected ejectors.
4. The refrigeration system of any of claims 1-3, wherein, The refrigeration system further comprises a control device connected to the evaporator and the generator respectively.
5. The refrigeration system of claim 4, wherein, The refrigeration system further comprises a compressor and a first valve connected to the control device respectively, the first valve is arranged on a pipeline between the ejector device and the condenser, and the compressor is connected to the first valve in parallel.
6. The refrigeration system of claim 5, wherein, The refrigeration system further comprises a temperature sensor connected to the control device, the temperature sensor is used for detecting an ambient temperature in a target space.
7. The refrigeration system of claim 4 wherein, The liquid storage device comprises a first liquid storage container and a second liquid storage container connected in parallel, an inlet end of the first liquid storage container and an inlet end of the second liquid storage container are connected to an outlet end of the condenser respectively, and an outlet end of the first liquid storage container and an outlet end of the second liquid storage container are connected to an inlet end of the generator respectively.
8. The refrigeration system of claim 7, wherein, A liquid level sensor connected to the control device is arranged in the first liquid storage container and the second liquid storage container.
9. The refrigeration system of claim 7, wherein, Valves are arranged on pipelines between the condenser and the liquid storage device and / or between the liquid storage device and the generator.
10. The refrigeration system of claim 4, wherein, The refrigeration system further comprises a throttling valve connected to the control device, the throttling valve is arranged on a pipeline between the condenser and the evaporator.
11. The refrigeration system of any of claims 1-3, wherein, The refrigeration system further comprises a heat recovery pipeline arranged in the generator, and first and second ends of the heat recovery pipeline extend out of the generator.
12. A method of refrigeration, characterized by The refrigeration method is applied to the refrigeration system of any one of claims 1 to 11, and the refrigeration method comprises: The generator absorbs heat of refrigeration fluid from a target space by using refrigerant liquid to evaporate to form first refrigerant vapor; The ejector device injects mixed gas to the condenser, the mixed gas comprises gas from the generator and gas from the evaporator, and the gas from the generator comprises the first refrigerant vapor; The condenser cools the mixed gas to obtain refrigerant liquid; Part of the refrigerant liquid flows into the evaporator, and the remaining part of the refrigerant liquid flows into the liquid storage device; The refrigerant liquid in the evaporator absorbs heat from the refrigerant fluid after the heat is absorbed by the generator to produce a second refrigerant vapor; the gas from the evaporator includes the second refrigerant vapor; The refrigerant liquid in the liquid storage device is input into the generator; The refrigerant fluid cooled by the evaporator is input into the target space.