A redundant dual-mode refrigeration device and method

Abstract

The present invention relates to the field of liquid cooling and heat dissipation technology, and provides a redundant dual-mode refrigeration device and method. The device of the present invention includes a three-way valve, a first cooling unit and a second cooling unit; the first cooling unit is connected to the first water outlet of the three-way valve, and is used to realize heat exchange between the coolant and the external water; the second cooling unit is connected to the second water outlet of the three-way valve, and is used to realize heat exchange between the coolant and the refrigerant; the coolant flows to the three-way valve through the water inlet, and then flows to the cooled device after being cooled by the first cooling unit and / or the second cooling unit, and then flows to the water inlet to form a circulation loop of the coolant after absorbing the heat of the cooled device. Different cooling modes can be selected by the three-way valve, so that the present invention can adapt to the requirements that different cooled devices need to be cooled to different temperatures.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid cooling and heat dissipation, and in particular to a redundant dual-mode refrigeration device and method. Background Art

[0002] With the rapid development of science and technology in my country, my country has developed domestically produced chips that can meet its own work and production needs. The units using domestically produced chips generally have a higher heat flux density and a higher thermal power consumption of the whole machine, which makes the chip itself have higher requirements for the heat dissipation of the equipment. Cabinets or equipment using such units usually use liquid cooling to achieve thermal control of the whole machine to avoid damage to the chip due to overheating. The use of liquid cooling requires the continuous circulation of external coolant under certain temperature, flow, and pressure requirements to take away the heat of the cabinet equipment. However, for some special usage scenarios (for example: when the chip needs to be quickly cooled to a specific temperature value, but it is difficult to meet the temperature requirements through the circulation of coolant), it is necessary to meet a more severe use environment, and the coolant cannot be directly cooled by air cooling, which greatly limits the scope of use and performance of the chip.

[0003] In view of this, improving the ability of refrigeration equipment to handle harsh environments is an issue that needs to be urgently addressed in this technical field. Summary of the invention

[0004] The embodiments of the present invention solve the problems existing in the above-mentioned prior art and provide a redundant dual-mode refrigeration device. When cooling a cooled device, the present invention can select different cooling modes through a three-way valve, so that the present invention can meet the requirements of cooling different cooled devices to different temperatures.

[0005] The present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a redundant dual-mode refrigeration device, comprising: a three-way valve, a first cooling unit, and a second cooling unit;

[0007] The first cooling unit is connected to the first water outlet of the three-way valve to achieve heat exchange between the coolant and external water;

[0008] The second cooling unit is connected to the second water outlet of the three-way valve to achieve heat exchange between the coolant and the refrigerant;

[0009] The coolant flows to the three-way valve through the water inlet, and then flows to the cooled device after being cooled by the first cooling unit and / or the second cooling unit, absorbs the heat of the cooled device and then flows to the water inlet to form a coolant circulation loop.

[0010] Preferably, a proportional-integral component is provided inside the three-way valve for allocating the ratio of the coolant flowing out of the first water outlet and the coolant flowing out of the second water outlet.

[0011] Preferably, a flow transmitter, a heater, an expansion tank and a circulation pump group are arranged between the water outlet of the cooled device and the water inlet of the three-way valve, and the water outlet of the cooled device, the flow transmitter, the heater, the expansion tank, the circulation pump group and the water inlet of the three-way valve are connected in sequence; the flow transmitter is used to monitor the real-time system flow; the heater is used to heat the coolant to prevent condensation in the system pipeline; the expansion tank is used to buffer the internal pressure of the system to ensure the stability of the system pressure; the circulation pump group is used to provide circulation power for the circulating liquid, and the circulation pump group consists of at least two circulation pumps, which are connected in parallel so that when some of the circulation pumps fail, the undamaged circulation pumps can ensure the normal operation of the system.

[0012] Preferably, a pressure transmitter, a temperature transmitter and a filter are provided at the water inlet of the cooled device and are connected through a pipeline. The pressure transmitter is used to monitor the real-time pressure of the coolant flowing into the cooled device; the temperature transmitter is used to measure the real-time temperature of the coolant flowing into the cooled device; and the filter is used to filter impurities in the coolant.

[0013] Preferably, according to the flow order of the coolant, starting from the water outlet of the cooled component, the circulation loop of the coolant has:

[0014] The water outlet of the cooled component, the flow transmitter, the heater, the expansion tank, the circulating pump group, the first cooling unit, the filter, the temperature transmitter, the pressure transmitter, the water outlet of the cooling component and the cooling component form a first circulation loop of the coolant;

[0015] The water outlet of the cooled component, the flow transmitter, the heater, the expansion tank, the circulation pump group, the second cooling unit, the filter, the temperature transmitter, the pressure transmitter, the water outlet of the cooling component and the cooling component form a second circulation loop of the coolant.

[0016] Preferably, the first cooling unit includes a heat exchanger and a pressure pump. External water flows into the heat exchanger to achieve heat exchange between the external water and the coolant. The pressure pump is used to provide power for external water circulation of the first cooling unit.

[0017] Preferably, the second cooling unit includes an evaporator, a gas-liquid separator, a compressor unit, a condenser, a liquid storage tank and a filter which are connected in sequence through pipelines to form a circulation loop of the refrigerant; the evaporator absorbs heat by evaporating the refrigerant to cool the coolant; the gas-liquid separator is used to prevent liquid refrigerant from entering the compressor; the compressor unit is composed of at least two compressors, which are connected in parallel so that when some of the compressors fail, the undamaged compressors can ensure the normal operation of the second cooling unit, and pressure controllers are provided on both sides of the compressor unit to monitor the pressure of the compressor unit; external water is passed through the condenser to cool the refrigerant; the liquid storage tank is used to store condensed refrigerant; a molecular sieve structure is used inside the filter to remove impurities and moisture in the pipeline.

[0018] Preferably, it further comprises a control unit, which comprises a sampling meter, a PLC controller and an I / O module; the PLC controller is electrically connected to the sampling meter; and the sampling meter is electrically connected to the I / O module.

[0019] Preferably, the flow transmitter, pressure transmitter and temperature transmitter are electrically connected to the control unit respectively.

[0020] In a second aspect, the present invention further provides a redundant dual-mode refrigeration method, including: an external water direct heat exchange mode and a compressor refrigeration mode, and the two modes are controlled and switched by the three-way valve, with the water outlet of the cooled device as the starting point, and the two modes are specifically:

[0021] External water direct heat exchange mode: When the first cooling unit is connected to the first water outlet of the three-way valve, the system is in the external water direct heat exchange mode. At this time, the coolant flows from the water outlet of the cooling device through the flow transmitter, and then passes through the heater. The circulating pump group provides power to transport the coolant after heat exchange with the cooled device to the heat exchanger of the first cooling unit. After heat exchange with the heat exchanger, the cooled coolant is transmitted to the cooled device through the filter, temperature transmitter and pressure transmitter, and the cycle repeats;

[0022] Compressor refrigeration mode: When the second cooling unit is connected to the second water outlet of the three-way valve, the system is in compressor refrigeration mode. At this time, the coolant flows from the water outlet of the cooling device through the flow transmitter, then passes through the heater, and is powered by the circulating pump group. The coolant after heat exchange with the cooled device is transported to the evaporator of the second cooling unit. After heat exchange with the heat exchanger, the cooled coolant is transmitted to the cooled device through the filter, temperature transmitter and pressure transmitter, and the cycle repeats.

[0023] Monitoring steps: The PLC controller is used to receive feedback information from the flow transmitter, pressure transmitter and temperature transmitter, and then record and analyze the flow, temperature and pressure in the coolant in real time; and adjust the cooling speed of the cooled device by adjusting the power of the circulation pump group.

[0024] The present invention preferably provides a proportional-integral component in the three-way valve. When the two modes jointly cool down the cooled device, and when the power of the circulating pump group is constant, the proportional-integral component is adjusted to thereby adjust the ratio of the coolant introduced into the first cooling unit and the second cooling unit in the two modes, so that the cooling effect can be best achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a simplified working principle diagram of a redundant dual-mode refrigeration device provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of a proportional-integral component of a redundant dual-mode refrigeration device provided by an embodiment of the present invention;

[0028] Figure 3 This is a diagram showing the actual working principle of a redundant dual-mode refrigeration device provided by an embodiment of the present invention;

[0029] Figure 4 It is a structural diagram of a redundant dual-mode refrigeration equipment filter membrane provided by an embodiment of the present invention;

[0030] Figure 5 The invention discloses a circuit control schematic diagram of a redundant dual-mode refrigeration equipment control unit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0033] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Embodiment 1:

[0035] Embodiment 1 of the present invention provides a redundant dual-mode refrigeration device, comprising: a three-way valve 1, a first cooling unit 2 and a second cooling unit 3;

[0036] The first cooling unit 2 is connected to the first water outlet of the three-way valve 1 to achieve heat exchange between the coolant and external water;

[0037] The second cooling unit 3 is connected to the second water outlet of the three-way valve 1 to achieve heat exchange between the coolant and the refrigerant;

[0038] The coolant flows to the three-way valve 1 through the water inlet, and then flows to the cooled device after being cooled by the first cooling unit 2 and / or the second cooling unit 3, absorbs the heat of the cooled device, and then flows to the water inlet to form a coolant circulation loop.

[0039] like Figure 1 As shown, it is a simplified working principle diagram of the refrigeration device provided by the present invention. After the coolant cools the cooled device, it flows through the three-way valve 1. Through the distribution of the three-way valve 1, the coolant is distributed to the first cooling unit 2 and / or the second cooling unit 3, and then flows to the cooled device, thereby achieving the cooling of the cooling device. On the basis of the prior art, the present invention adds the second cooling unit 3, which greatly increases the refrigeration capacity of the device.

[0040] The three-way valve 1 is provided with a proportional-integral component 101 inside, which is used to distribute the ratio of the coolant flowing out of the first water outlet and the coolant flowing out of the second water outlet.

[0041] The device of the present invention cools down the cooling device. When two modes (external water direct heat exchange mode and compressor refrigeration mode) are selected to run simultaneously, the amount of coolant flowing through the three-way valve 1 in the two different modes is different, and the comprehensive cooling effect is also different. In order to achieve the best cooling effect under the premise of the existing dual mode, the present invention preferably sets a proportional integral component 101 in the three-way valve 1, such as Figure 2As shown, it is a schematic diagram of a proportional-integral component. The proportional-integral component 101 can adjust the ratio of the coolant entering the first cooling unit 2 and the second cooling unit 3 by adjusting the area of ​​the water outlet blocked by the proportional-integral component 101. When the water outlet is completely blocked by the proportional-integral component 101, it indicates that the water outlet is closed, and the coolant allocated to the circulation is zero. In actual operation, when the two modes are working at the same time, the control variable method can be used to fix the speed of the circulation pump group 7. By continuously adjusting the distribution ratio of the proportional-integral component 101 to the coolant in different modes, the distribution ratio value with the best cooling effect is obtained, thereby improving the adaptability of the equipment to more severe environments, thereby improving the cooling effect of the present invention. It is worth noting that when the proportional integral completely blocks the first water outlet and / or the second water outlet, it indicates that

[0042] A flow transmitter 4, a heater, an expansion tank 6 and a circulation pump group 7 are arranged between the water outlet of the cooled device and the water inlet of the three-way valve 1, and the water outlet of the cooled device, the flow transmitter 4, the heater, the expansion tank 6, the circulation pump group 7 and the water inlet of the three-way valve 1 are connected in sequence; the flow transmitter 4 is used to monitor the real-time system flow; the heater is used to heat the coolant to prevent condensation in the system pipeline; the expansion tank 6 is used to buffer the internal pressure of the system to ensure the stability of the system pressure; the circulation pump group 7 is used to provide circulation power for the circulating liquid, and the circulation pump group 7 is composed of at least two circulation pump groups 7, and the circulation pumps are connected in parallel, so that when a part of the circulation pumps fails, the undamaged circulation pumps can ensure the normal operation of the system.

[0043] Furthermore, a pressure transmitter 8, a temperature transmitter 9, and a filter 10 are provided at the water inlet of the cooled device and are connected by a pipeline. The pressure transmitter 8 is used to monitor the real-time pressure of the coolant flowing into the cooled device; the temperature transmitter 9 is used to measure the real-time temperature of the coolant flowing into the cooled device; and the filter 10 is used to filter impurities in the coolant.

[0044] like Figure 3As shown, it represents the working principle diagram of the present invention. In the embodiment of the present invention, in order to ensure the reciprocating flow of the coolant of the present invention to cool down the cooled device, it is necessary to set a circulating pump on the path of the coolant circulation, and the circulating pump provides power for the circulation of the coolant. In the embodiment of the present invention, a circulating pump group 7 is preferably set, and each circulating pump is connected in parallel. The redundant design of multiple circulating pumps is adopted. When a part of the circulating pumps is damaged or cannot operate normally, the undamaged circulating pump can ensure the normal operation of the system. Considering the cost reasons, in actual situations, the circulating pump group usually selects a 1 main 1 spare circulating pump configuration. When the main circulating pump is damaged, the spare circulating pump ensures the normal circulation of the coolant. When the temperature is too low, condensation will occur in the equipment pipeline, and the condensation phenomenon will produce a corresponding conductive channel, which will affect the electrical insulation of the equipment, so that the area that should not be conductive is converted into a normal conductive area, which will cause damage to the equipment and the user. In the embodiment of the present invention, a heater is preferably set at the front end of the circulating pump group 7, and the heater can heat the pipeline to protect the equipment. In addition, a filter 10 is provided on the coolant circulation path of the present invention. After the cooling device passes through the first cooling unit 2 and / or the second cooling unit 3, the filter 10 can filter out impurities generated by corrosion and aging during the operation of the equipment, thereby preventing the pipeline from being blocked due to long-term operation of the system.

[0045] The essence of cooling is the process of converting the cooled device from a high temperature state to a low temperature state through the coolant. The cooling effect of the coolant on the cooled component depends on the flow rate of the coolant, the temperature difference between the coolant and the cooled device, and the contact surface of the cooling device and the coolant for heat exchange. When the cooling device is fixed (the temperature of the cooling device and the contact surface for heat exchange with the coolant are constant), the cooling effect of the coolant can be indirectly measured by measuring the flow, temperature and pressure of the coolant circulation process. In addition, a thermometer can be set at the outlet of the cooling device to find the optimal parameter value under the condition that the equipment strength allows by adjusting the flow, temperature and pressure of the coolant. The flow, temperature and pressure corresponding to the maximum temperature difference point of the thermometer on both sides of the inlet and outlet of the cooling device are the optimal parameter values. This process indirectly adjusts the pressure and flow of the coolant in the equipment by adjusting the power or gear of the process circulation pump group 7, and the temperature in the coolant can be indirectly adjusted by adjusting the efficiency of the first cooling unit 2 and the second cooling unit 3.

[0046] The coolant circulation corresponding to the embodiment of the present invention is a complete loop. In order to facilitate the subsequent elaboration of the scheme of the present invention, it is preferred to set the water outlet of the cooled device as the starting point for elaboration. According to the flow order of the coolant, the scheme of the present invention can cut the embodiment into two circulation loops through the three-way valve 1. Among them, the first loop is: the water outlet of the cooled component, the flow transmitter 4, the heater, the expansion tank 6 and the circulating pump group 7, the first cooling unit 2, the filter 10, the temperature transmitter 9, the pressure transmitter 8, the cooling component water outlet, and the cooling component, forming the first circulation loop of the coolant. When the cooled device is cooled only by the first circulation loop, the water inlet of the coolant flowing through the second cooling unit 3 will be closed. When the cooled device is cooled only through the second circulation loop, the three-way valve 1 is closed to the water inlet of the first cooling unit 2, and the water inlet of the second cooling unit 3 is connected. At this time, the second circuit is specifically: the outlet of the cooled component, the flow transmitter 4, the heater, the expansion tank 6 and the circulation pump group 7, the second cooling unit 3, the filter 10, the temperature transmitter 9, the pressure transmitter 8, the outlet of the cooling component, and the cooling component, forming the second circulation loop of the coolant. When the cooled device faces more stringent cooling requirements, the two modes are used to cool the cooling device at the same time, so that the temperature difference between the inlet and outlet of the coolant is larger, and a better cooling effect is achieved.

[0047] The first cooling unit 2 of the present invention is a conventional cooling unit, and the core component of the first cooling unit 2 is a heat exchanger 201. The cooling water in the heat exchanger 201 is heat exchanged with the coolant in the circulation system to achieve the effect of cooling the coolant. The first cooling unit 2 of the embodiment of the present invention specifically includes a heat exchanger 201 and a pressure pump 202. The heat exchanger 201 is generally provided with two water inlets and two water outlets. One set of water inlets and outlets of the heat exchanger 201 is used to allow the coolant to pass through, and the other set of water inlets and outlets are used for external water to pass through the heat exchanger 201 and perform heat exchange with the coolant. In order to fully perform heat exchange between the coolant of the present invention and the external cooling, when the fluid enters the heat exchanger 201 for heat exchange, the circulation path of the coolant of the present invention and the external circulating water should be set according to the principle that the heated fluid enters from the bottom and exits from the top, the cooled fluid enters from the top and exits from the bottom, and the cold fluid and the hot fluid are arranged in countercurrent to achieve the best heat exchange (cooling) effect.

[0048] Secondly, in order to achieve a better cooling effect, the flow rate of the coolant can generally be reduced to allow the coolant to fully exchange heat with the external medium. In theory, if the time is long enough and the external medium is sufficient, the coolant can be reduced to a temperature close to that of the medium (actually slightly higher than the medium temperature). However, in the actual process, the cooled device cannot be in a high temperature state for a long time. In order to keep the cooled device in a stable working state for a long time during operation, the coolant needs to take away as much heat from the cooled device as possible in the shortest time, and the heat taken away per unit time should be greater than or equal to the heat generated by the cooled device. In order to prevent the cooled device from heating up and being damaged or unable to work normally when the heat generated by the cooled device is greater than the heat taken away by the coolant, we generally add additional cooling units to further enhance the cooling effect. In combination with the embodiment of the present invention, a second cooling unit 3 is provided on the basis of the first cooling unit 2. The second cooling unit 3 can be cooled by external water like the first cooling unit 2, and the pressure pump 202 provides power for the external water circulation of the first cooling unit.

[0049] In order to make the present invention adaptable to a more severe environment (more stringent cooling requirements), the embodiment of the present invention preferably sets the heat exchange mode of the second cooling unit 3 to the heat exchange of the evaporator 301, and absorbs the heat of the coolant through the evaporation phase change process of the refrigerant in the evaporator 301 to cool down. The preferred second cooling unit 3 of the embodiment of the present invention specifically includes an evaporator 301, a gas-liquid separator 302, a compressor unit 303, a condenser 304, a liquid storage tank 305 and a drying filter 306, which are connected in sequence through pipelines to form a refrigerant circulation loop. The evaporator 301 is provided with a pipeline that allows the refrigerant and the coolant to pass through. The refrigerant absorbs heat through the evaporation phase change and takes away the temperature in the coolant to cool down. In the process of using the second cooling unit 3 for cooling, a gas-liquid separator 302 is provided at the water inlet of the compressor. The gas-liquid separator 302 can separate the gas-liquid coexistence in the equipment to prevent the liquid refrigerant from entering the compressor or causing sudden liquid shock to the compressor, thereby causing damage to the compressor. In order to improve the adaptability of the present invention to the harsh environment, the compressor is preferably set as a compressor group 303, and the compressors in the compressor group 303 are connected in parallel. The compressor adopts a redundant design like the circulating pump, so that the equipment has better adaptability and disaster recovery capability; when a part of the compressor is damaged or cannot work normally, the other intact compressors can ensure the normal operation of the refrigerant cycle. In the embodiment of the present invention, pressure gauges 307 are set on both sides of the compressor group 303 to monitor whether the compressor group 303 is working normally. From the perspective of cost accounting and the adaptability of the equipment, the actual implementation process usually selects a 1 main and 1 standby compressor configuration. In the case of damage to the main compressor, the standby compressor ensures the normal circulation of the refrigerant. In addition, the compressor group 303 also provides power for the circulation of the refrigerant. The condenser 304 set in the second cooling unit 3 is mainly used to condense the high-temperature and high-pressure refrigerant transmitted from the compressor. After the refrigerant passes through the condenser 304, a part of the refrigerant will be cooled into a liquid state and stored in the liquid storage tank. The compressor drives the liquid storage tank 305 and the liquefied refrigerant in the pipeline to enter the evaporator 301 for evaporation and heat absorption, completing a refrigerant cycle. During the long-term circulation of the refrigerant, friction and electrochemical corrosion will occur between the refrigerant and the equipment, resulting in a small amount of impurities in the equipment. The coolant circulates into the internal circulation of the evaporator 301 and also produces a small amount of moisture. In the embodiment of the present invention, a drying filter 306 is preferably provided at the water inlet of the refrigerant circulation loop of the evaporator 301. The filter membrane in the drying filter 306 adopts a molecular sieve structure, such as Figure 4 As shown, it means that the filter membrane adopts a molecular sieve structure. The molecular sieve structure can effectively remove impurities and moisture in the pipeline, thereby achieving the purpose of purifying the system and avoiding damage to the equipment caused by impurities and moisture.

[0050] Furthermore, in order to ensure that the equipment can cool the cooled device normally and continuously. In addition to the above-described settings, the present invention is usually provided with a refill unit. In the actual operation process, a portion of the coolant will be lost more or less. As time accumulates, the coolant will be insufficient, resulting in a reduced refrigeration effect. The refill unit mainly realizes the replenishment of the equipment coolant. Generally, the refill unit includes a refill device, a refill pipeline, a valve, and some frames. In the process of the equipment cooling the cooled device, all parameters in the equipment are fixed by the control variable method, and the loss relationship between the coolant and time is obtained (in the actual process, it can be observed by the change in the indication of the pressure or flow transmitter 4 after a certain period of time, and then the coolant is replenished to the pressure or flow indication in the initial state. At this time, the replenished coolant is the lost coolant), and the relationship between the loss of the coolant and time is obtained. Then, the speed of adding coolant is obtained through the relationship function of the loss of coolant and time, so as to ensure the stable and continuous supply of coolant.

[0051] In addition, the device of the embodiment of the present invention further includes a control unit 11, such as Figure 5 As shown, it is a circuit control schematic diagram of the control unit, the control unit 11 includes a sampling meter 1101, a PLC controller 1102 and an I / O module 1103; the PLC controller 1102 is electrically connected to the sampling meter 1101; the sampling meter 1101 is electrically connected to the I / O module 1103, and the flow transmitter 4, the pressure transmitter 8 and the temperature transmitter 9 are electrically connected to the control unit 11 respectively.

[0052] Among them, in the process of evaluating the cooling effect of the device, it is necessary to measure the changes in parameters during the circulation of the coolant. The cooling effect of the device depends on the temperature difference before and after the cooling of the cooled device per unit time. However, in the actual operation process, it is difficult to dynamically measure the real-time temperature of each cooled device (especially precision devices such as chips). From the perspective of energy conservation, the cooling effect of the device is indirectly indicated by measuring the temperature difference between the water inlet and the water outlet of the cooled device. In the measurement process, the temperature parameter needs to be output, and in the circulation process of the coolant, in addition to the temperature difference between the water inlet and the water outlet can directly reflect the cooling effect of the present invention, the circulation speed of the coolant per unit time can also be adjusted by controlling the equipment circulation pump group 7, so that the coolant can quickly take away the heat generated in the cooling device. The corresponding process can indirectly reflect the cooling effect of the device through the changes in flow, temperature and pressure parameters. The embodiment of the present invention uses the PLC controller 1102 to receive the feedback information of the flow, temperature and pressure transmitter 8, and converts the measured electrical signal into a digital signal and displays it on the sampling instrument 1101. Then the cooling effect of the device is evaluated by real-time recording and analyzing the flow, temperature and pressure in the coolant. The refrigeration effect of the device of the present invention can be indirectly evaluated by the temperature difference of the coolant at the water inlet and the water outlet of the cooled component per unit time. The larger the temperature difference, the better the refrigeration effect, and vice versa.

[0053] It is worth noting that, before cooling the cooled device, the present invention can obtain the optimal circulation temperature, pressure and flow rate of the coolant in advance through experimental methods, thereby improving the cooling effect of the equipment.

[0054] Embodiment 2:

[0055] After providing a redundant dual-mode refrigeration device described in Example 1, the present invention further provides a reinforced dual-redundant dual-mode refrigeration method, and makes relevant elaborations from the perspective of the implementation method of the corresponding equipment and structure provided in Example 1 of the present invention, and further analyzes the design principle of the device in depth. The embodiment of the present invention mainly adopts two refrigeration modes to cool the cooled device, and the two modes can be flexibly switched through the three-way valve 1. The embodiment of the present invention still uses the water outlet of the cooled device as the starting point to explain the two modes.

[0056] When the first cooling unit 2 is connected to the first water outlet of the three-way valve 1, the system is in the external water direct heat exchange mode. At this time, the coolant flows from the water outlet of the cooling device through the flow transmitter 4, and then passes through the heater. The circulating pump group 7 provides power to transport the coolant after heat exchange with the cooled device to the heat exchanger 201 of the first cooling unit 2. After heat exchange with the heat exchanger 201, the cooled coolant is transmitted to the cooled device through the filter 10, the temperature transmitter 9 and the pressure transmitter 8, and the cycle repeats.

[0057] When the second cooling unit 3 is connected to the second water outlet of the three-way valve 1, the system is in the compressor refrigeration mode. At this time, the coolant flows from the water outlet of the cooling device through the flow transmitter 4, and then passes through the heater. The circulating pump group 7 provides power to transport the coolant after heat exchange with the cooled device to the evaporator 301 of the second cooling unit 3. After heat exchange with the heat exchanger 201, the cooled coolant is transmitted to the cooled device through the filter 10, the temperature transmitter 9 and the pressure transmitter 8, and the cycle repeats.

[0058] The embodiment of the present invention is provided with a second cooling unit 3 system (refrigerant cooling circulation system) on the basis of the existing one. Whether the coolant is cooled by the first cooling unit 2 (external water direct heat exchange mode) or the coolant is cooled by the second cooling unit 3 (compressor refrigeration mode), in theory, the slower the flow rate of the coolant, the better the cooling effect. However, the cooled device is also constantly generating heat. If the circulation speed of the coolant is too slow, it will be difficult to bring the heat generated by the cooled device out of the cooled device in time, and the cooling effect will not be achieved. During the equipment debugging stage, the control variable method is used to continuously adjust the power of the circulating pump group 7, and then test the optimal cooling conditions in each mode (the temperature, pressure and fluid flow in the coolant circulation system when the cooling effect is best).

[0059] When the system is in some more severe environments, it is necessary to use the first cooling unit 2 and the second cooling unit 3 at the same time to cool the cooled device. In the embodiment of the present invention, a proportional integral component 101 is arranged in the three-way valve 1, and the proportional integral component 101 can allocate the ratio of the coolant flowing out of the first water outlet and the second water outlet (the proportional integral component 101 can also close the water inlet of the first cooling unit 2 or the second cooling unit 3). During the debugging stage of the equipment, only the ratio of the coolant entering the two modes is changed, and the optimal distribution ratio of the coolant in the two modes can be obtained (under this distribution ratio, the cooling effect is the best). Then a better cooling effect can be achieved.

[0060] The present invention sets a compressor refrigeration mode (the medium is a refrigerant) on the existing basis, so that the present invention can adapt to a more severe environment and improve the cooling effect.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A redundant dual-mode refrigeration device, characterized in that: include: A three-way valve (1), a first cooling unit (2) and a second cooling unit (3); The first cooling unit (2) is connected to the first water outlet of the three-way valve (1) to achieve heat exchange between the coolant and external water; The second cooling unit (3) is connected to the second water outlet of the three-way valve (1) to achieve heat exchange between the coolant and the refrigerant; The coolant flows to the three-way valve (1) through the water inlet, and then flows to the cooled device after being cooled by the first cooling unit (2) and / or the second cooling unit (3), absorbs the heat of the cooled device, and then flows to the water inlet to form a coolant circulation loop; The first cooling unit (2) comprises a heat exchanger (201) and a pressure pump (202); external water flows into the heat exchanger (201) to achieve heat exchange between the external water and the coolant; the pressure pump (202) is used to provide power for external water circulation of the first cooling unit; The second cooling unit (3) comprises an evaporator (301), a gas-liquid separator (302), a compressor unit (303), a condenser (304), a liquid storage tank (305) and a filter drier (306), which are connected in sequence through pipelines to form a refrigerant circulation loop; the evaporator (301) absorbs heat by evaporating the refrigerant and is used to cool the coolant; the gas-liquid separator (302) is used to prevent liquid refrigerant from entering the compressor; the compressor unit (303) is composed of at least two compressors, each of which is connected in parallel so that when a part of the compressors fails, the undamaged compressors can ensure the normal operation of the second cooling unit (3), and pressure gauges (307) are provided on both sides of the compressor unit (303) for monitoring the pressure of the compressor unit (303); external water is passed through the condenser (304) to cool the refrigerant; the liquid storage tank (305) is used to store the condensed refrigerant; the filter drier (306) has a molecular sieve structure inside to remove impurities and moisture in the pipeline.

2. The redundant dual-mode refrigeration device according to claim 1, characterized in that: The three-way valve (1) is provided with a proportional-integral component (101) inside, which is used to distribute the ratio of the coolant flowing out of the first water outlet and the coolant flowing out of the second water outlet.

3. The redundant dual-mode refrigeration device according to claim 1, characterized in that: A flow transmitter (4), a heater (5), an expansion tank (6) and a circulation pump group (7) are arranged between the water outlet of the cooled device and the water inlet of the three-way valve (1), and the water outlet of the cooled device, the flow transmitter (4), the heater (5), the expansion tank (6), the circulation pump group (7) and the water inlet of the three-way valve (1) are connected in sequence; the flow transmitter (4) is used to monitor the real-time system flow; the heater (5) is used to heat the coolant to prevent condensation in the system pipeline; the expansion tank (6) is used to buffer the internal pressure of the system to ensure the stability of the system pressure; the circulation pump group is used to provide circulation power for the circulating liquid, and the circulation pump group (7) is composed of at least two circulation pumps, and the circulation pumps are connected in parallel, so that when a part of the circulation pumps fails, the undamaged circulation pumps can ensure the normal operation of the system.

4. The redundant dual-mode refrigeration device according to claim 1, characterized in that: A pressure transmitter (8), a temperature transmitter (9), and a filter (10) are provided at the water inlet of the cooled device and are connected via a pipeline. The pressure transmitter (8) is used to monitor the real-time pressure of the coolant flowing into the cooled device; the temperature transmitter (9) is used to measure the real-time temperature of the coolant flowing into the cooled device; and the filter (10) is used to filter impurities in the coolant.

5. The redundant dual-mode refrigeration device according to claim 1, characterized in that: According to the flow order of the coolant, starting from the outlet of the cooled component, the circulation loop of the coolant has the following characteristics: The water outlet of the cooled component, the flow transmitter (4), the heater (5), the expansion tank (6), the circulating pump group (7), the first cooling unit (2), the filter (10), the temperature transmitter (9), the pressure transmitter (8), the water outlet of the cooling component and the cooling component form a first circulation loop of the coolant; The water outlet of the cooled component, the flow transmitter (4), the heater (5), the expansion tank (6), the circulation pump group (7), the second cooling unit (3), the filter (10), the temperature transmitter (9), the pressure transmitter (8), the water outlet of the cooling component and the cooling component form a second circulation loop of the coolant.

6. The redundant dual-mode refrigeration device according to claim 1, characterized in that: It also includes a control unit (11), the control unit including a sampling meter (1101), a PLC controller (1102) and an I / O module (1103); the PLC controller (1102) is electrically connected to the sampling meter; the sampling meter is electrically connected to the I / O module.

7. The redundant dual-mode refrigeration device according to claim 3, characterized in that: The flow transmitter (4), the pressure transmitter (8) and the temperature transmitter (9) are electrically connected to the control unit (11) respectively.

8. A redundant dual-mode refrigeration method, characterized in that: include: External water direct heat exchange mode and compressor cooling mode, and the two modes are controlled and switched by a three-way valve (1), with the water outlet of the cooled device as the starting point. The two modes are specifically: External water direct heat exchange mode: when the first cooling unit (2) is connected to the first water outlet of the three-way valve (1), the system is in the external water direct heat exchange mode. At this time, the coolant flows from the water outlet of the cooling device as the starting point through the flow transmitter (4), then passes through the heater (5), and is powered by the circulating pump group (7). The coolant after heat exchange with the cooled device is transported to the heat exchanger (201) of the first cooling unit (2). After heat exchange with the heat exchanger (201), the cooled coolant is transmitted to the cooled device through the filter (10), the temperature transmitter (9) and the pressure transmitter (8), and the cycle repeats. Compressor cooling mode: when the second cooling unit (3) is connected to the second water outlet of the three-way valve (1), the system is in the compressor cooling mode. At this time, the coolant flows from the water outlet of the cooling device through the flow transmitter (4), then passes through the heater (5), and is powered by the circulating pump group (7). The coolant is transported to the evaporator (301) of the second cooling unit (3) after heat exchange with the cooled device. After heat exchange with the heat exchanger (201), the cooled coolant is transmitted to the cooled device through the filter (10), the temperature transmitter (9) and the pressure transmitter (8), and the cycle repeats. Monitoring steps: The PLC controller (1102) is used to receive feedback information from the flow transmitter (4), the pressure transmitter (8) and the temperature transmitter (9), and then record and analyze the flow, temperature and pressure in the coolant in real time; and adjust the cooling speed of the cooled device by adjusting the power of the circulation pump group (7).

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