This application claims priority to Chinese Patent Application No. 202110650465.1, filed on Jun. 10, 2021, which is hereby incorporated by reference in its entirety.
The embodiments relate to the air conditioner refrigeration field, a composite refrigeration system, and a data center equipped with the composite refrigeration system.
For an indoor scenario in which a heat source is provided, especially provided in a centralized manner, heat dissipation processing usually needs to be performed on an area in which the heat source is located. A data center is used as an example. A plurality of servers is arranged in the data center, and these servers generate a large amount of heat during running A refrigeration system of the data center is used to dissipate the heat and cool the data center, to ensure that the server in the data center can run normally in an environment with a preset temperature.
Most of the plurality of servers in the data center are running uninterruptedly. Therefore, the refrigeration system of the data center needs to operate in cooperation with the server for a long time to uninterruptedly dissipate the heat and cool the data center. An existing refrigeration system of a data center cannot effectively recycle heat generated by a cabinet, and long-time operation of the refrigeration system results in a waste of resources.
A composite refrigeration system and a data center equipped with the composite refrigeration system may recycle at least a portion of heat generated indoors, to achieve an effect of energy saving and emission reduction.
According to a first aspect, a composite refrigeration system may include a refrigeration part, a heat dissipation part, a first pipeline, a second pipeline, and a refrigerant, where the first pipeline is connected between the refrigeration part and the heat dissipation part, and is configured to send the refrigerant from the heat dissipation part to the refrigeration part; the refrigeration part is connected to indoor space, and is configured to use the refrigerant to cool air sent into the indoor space; and the second pipeline is also connected between the refrigeration part and the heat dissipation part, and is configured to send the refrigerant from the refrigeration part to the heat dissipation part, where the heat dissipation part includes a heat exchanger and a cooler, and the heat dissipation part includes three heat dissipation modes for the refrigerant: in a first heat dissipation mode, the heat dissipation part performs air-cooled heat dissipation on the refrigerant by using the cooler alone; in a second heat dissipation mode, the heat dissipation part exchanges heat between the refrigerant and a heat carrier in an external pipeline network by using the heat exchanger alone, to perform heat dissipation; and in a third heat dissipation mode, the heat dissipation part performs heat dissipation on the refrigerant by simultaneously using the cooler and the heat exchanger.
The composite refrigeration system may form a circulating refrigeration path of the refrigerant through the refrigeration part, the second pipeline, the heat dissipation part, and the first pipeline. When the refrigerant is in the refrigeration part, the refrigerant may be used to cool the air sent into the indoor space, to achieve an effect of reducing an indoor ambient temperature. When the refrigerant flows to the heat dissipation part, the refrigerant may be heat dissipated by using the cooler or the heat exchanger, or simultaneously using the cooler and the heat exchanger, to form three different heat dissipation modes.
The heat exchanger and the external pipeline network form a heat exchange form. When the refrigerant flows through the heat exchanger in a second heat dissipation mode and a third heat dissipation mode, heat exchange may be formed with the heat carrier in the external pipeline network, to implement heat dissipation of the refrigerant and heat transfer to the heat carrier in the external pipeline network at the same time. The external pipeline network may be used as a heating pipe, a hot water pipe, and the like, and correspondingly, the heat carrier may be used as heating, hot water, or the like, thereby implementing energy recycle and reuse.
In a possible implementation, the cooler is a condenser, the condenser is connected in parallel to the heat exchanger, and the condenser is configured to directly perform air-cooled heat dissipation on the refrigerant.
In this implementation, the composite refrigeration system may perform condenser heat dissipation, and the condenser may directly perform air-cooled heat dissipation on the refrigerant. The condenser and the heat exchanger are connected in parallel, so that when the heat dissipation part uses the second heat dissipation mode or the third heat dissipation mode, the refrigerant in the heat exchanger may directly exchange heat with the heat carrier in the external pipeline network.
In a possible implementation, the composite refrigeration system further includes a controller and a first three-way valve. Three ports of the first three-way valve are respectively connected to the second pipeline, the heat exchanger, and the condenser, and the controller controls the first three-way valve to adjust the heat dissipation mode of the heat dissipation part.
In this implementation, the first three-way valve is controlled by the controller. In this way, flow distribution may be performed on a refrigerant flowing into the condenser for heat dissipation and a refrigerant flowing into the heat exchanger for heat exchange, to further control the heat dissipation mode of the heat dissipation part in the composite refrigeration system. Further, a flow quantity of the refrigerant flowing into the heat exchanger is controlled. In this way, a heating temperature of the heat carrier in the external pipeline network may be controlled.
In a possible implementation, the cooler is a dry cooler, the dry cooler is connected in parallel to the external pipeline network, and the dry cooler performs air-cooled heat dissipation on the heat carrier to implement indirect air-cooled heat dissipation on the refrigerant.
In this implementation, the composite refrigeration system may perform dry cooler heat dissipation. After all refrigerants flow through the heat exchanger and complete heat dissipation with the heat carrier in the external pipeline network, the dry cooler may further perform air-cooled heat dissipation on the heat carrier, and further control the heating temperature of the heat carrier, to implement the indirect air-cooled heat dissipation on the refrigerant.
In a possible implementation, the composite refrigeration system further includes a controller and a second three-way valve. Three ports of the second three-way valve are respectively connected to the heat exchanger, the external pipeline network, and the dry cooler, and the controller controls the second three-way valve to adjust the heat dissipation mode of the heat dissipation part.
In this implementation, the second three-way valve is controlled by the controller. In this way, after heat exchange between the refrigerant and the heat carrier is completed, flow distribution may be performed on a heat carrier flowing into the dry cooler for heat dissipation and a heat carrier flowing into a back end of the external pipeline network, to further control the heating temperature of the heat carrier in the external pipeline network of the composite refrigeration system.
In a possible implementation, the composite refrigeration system is provided with a temperature sensor. The temperature sensor is disposed in the indoor space for monitoring a temperature in the indoor space, the temperature sensor is electrically connected to the controller, and the controller controls the first three-way valve or the second three-way valve with reference to a temperature value detected by the temperature sensor.
In this implementation, a temperature rise range of the refrigerant in the refrigeration part may be determined by monitoring an indoor temperature by the temperature sensor. When the indoor temperature is relatively low, a cooling degree of the refrigerant to air sent into the indoor space is relatively low when the refrigerant flows through the refrigeration part, and temperature rise of the refrigerant is relatively low. At this time, heat transferred by the refrigerant to the heat carrier through the heat exchange is relatively low. The controller may increase a flow quantity of a refrigerant flowing into the heat exchanger or decrease a flow quantity of a heat carrier flowing into the dry cooler, to increase the heating temperature of the heat carrier. However, when the indoor temperature is relatively high, the controller decreases the flow quantity of the refrigerant in the heat exchanger or increases the flow quantity of the heat carrier in the dry cooler, to decrease the heating temperature of the heat carrier. In both control manners, the heating temperature of the heat carrier may be kept relatively balanced.
In a possible implementation, the refrigeration part includes an electronic expansion valve, an evaporator, and a compressor that are sequentially connected, the electronic expansion valve is located on a side of the evaporator that is close to the first pipeline, and the compressor is located on a side of the evaporator that is close to the second pipeline.
In this implementation, the evaporator is configured to cool air sent into the indoor space. The electronic expansion valve is configured to reduce pressure of the refrigerant, to facilitate evaporation and heat absorption of the refrigerant in the evaporator. The compressor is configured to compress the refrigerant, to increase the pressure and a temperature of the refrigerant, and restore a liquid state of the refrigerant, thereby facilitating heat exchange efficiency between the refrigerant and the heat carrier.
In a possible implementation, the composite refrigeration system further includes a circulating ventilation channel. An air supply port and an air outlet port of the circulating ventilation channel are separately connected to the indoor space. The refrigeration part is disposed in the circulating ventilation channel and is configured to refrigerate air flowing out of the air outlet port and send refrigerated air into the indoor space through the air supply port.
In this implementation, the circulating ventilation channel may implement air circulation inside the indoor space. After air sent out from the indoor space is cooled by the refrigeration part, low-temperature air is returned to the indoor space, to ensure cleanness of air in the indoor space.
In a possible implementation, a heat exchange core is further disposed in the circulating ventilation channel. The heat exchange core is located between the air outlet port and the refrigeration part, external air flows at the heat exchange core, and the heat exchange core is configured to introduce the external air to perform pre-refrigeration on the air flowing out of the air outlet port.
In this implementation, the heat exchange core may be disposed to pre-refrigerate air in the circulating ventilation channel, to reduce a temperature of air flowing to the refrigeration part, and further reduce power consumption of the composite refrigeration system. At the same time, a temperature of air outside the heat exchange core is lower than a temperature of the refrigerant or the heat carrier in the heat dissipation part, and the air may further assist heat dissipation of the condenser or the dry cooler.
According to a second aspect, a data center may center include an equipment room and the composite refrigeration system provided in the first aspect. The refrigeration part of the composite refrigeration system is connected to indoor space of the equipment room.
In the second aspect, because the equipment room of the data center uses the composite refrigeration system in the first aspect for heat dissipation, the data center also has the foregoing energy recycling function, which is more energy-saving and environment-friendly.
In a possible implementation, the composite refrigeration system includes a controller, the data center includes a server, the controller is further communicatively connected to the server, and the controller further controls a heat dissipation mode of the composite refrigeration system with reference to a workload of the server.
In this implementation, the controller may monitor the workload of the server through being communicatively connected to the server in the data center. When the workload of the server is relatively high, heat generated by the server is relatively high. In this case, the composite refrigeration system needs to increase a refrigerating intensity of the refrigeration part, to make a greater cooling range of air sent into the indoor space and ensure an indoor heat dissipation effect. Because a temperature of the refrigerant is relatively increased, the controller may decrease a flow quantity of a refrigerant in the heat exchanger or increase a flow quantity of the heat carrier in the dry cooler, to reduce a heating temperature of the heat carrier. Conversely, when the workload of the server is relatively low, the flow quantity of the refrigerant flowing into the heat exchanger is increased, or the flow quantity of the heat carrier flowing into the dry cooler is decreased. In both control manners, the heating temperature of the heat carrier may be kept relatively balanced.
The following describes the solutions in the embodiments with reference to the accompanying drawings. It is clear that the described embodiments are merely some but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments without creative efforts shall fall within the scope of the embodiments.
The composite refrigeration system may be used in an indoor environment with a heat source and is applicable to an indoor environment in which the heat source is centrally arranged, for example, may be used in a data center. The following uses a data center as an example for description.
In some implementation scenarios, in addition to the IT device and the power supply apparatus, a concept of the data center further includes a temperature control system and another auxiliary device. Therefore, the composite refrigeration system 100 in this embodiment may also be considered as a part of the data center.
In the illustration of
Thus, the equipment room 200 of the data center and the circulating ventilation channel 10 form a sealed circulating ventilation path. The composite refrigeration system 100 may carry, through air flowing out of the air outlet port 12, heat generated by the server 201 during operation out of the equipment room. The air is refrigerated and heat dissipated by the composite refrigeration system 100 and is sent back to the equipment room from the air supply port 11, to implement overall heat dissipation of the equipment room 200 of the data center. In the embodiment shown in
In the structure shown in
Referring to
The first pipeline 41 and the second pipeline 42 are separately connected between the refrigeration part 20 and the heat dissipation part 30. The first pipeline 41 is configured to send the refrigerant from the heat dissipation part 30 to the refrigeration part 20, and the second pipeline 42 is configured to send the refrigerant from the refrigeration part 20 to the heat dissipation part 30. The refrigeration part 20 is disposed in the circulating ventilation channel 10, and is configured to cool and refrigerate, by using the refrigerant, the air sent into the equipment room 200 of the data center. A process in which the refrigerant cools and refrigerates the air may be understood as a process in which the refrigerant exchanges heat with the air. A temperature of the refrigerant that is cooled and refrigerated in the refrigeration part 20 is increased, and the heat dissipation part 30 is configured to dissipate heat of the refrigerant.
Referring to
The electronic expansion valve 21 is configured to throttle and depressurize the refrigerant, so that the refrigerant is converted from a liquid state to a gas-liquid mixed state. The evaporator 22 is configured to make the refrigerant evaporate and absorb heat, to implement heat exchange between the refrigerant and the air sent into the equipment room 200 of the data center. In other words, the evaporator 22 is configured to cool the air sent into the equipment room 200 of the data center. The compressor 23 is configured to pressurize the refrigerant, so that the refrigerant is converted from the gas-liquid mixed state to a high-temperature liquid state and is sent to the heat dissipation part 30 for heat dissipation. In some embodiments, the compressor 23 may convert a portion of the refrigerant into a liquid state, and formation of the entire liquid state of the refrigerant may also be completed in the heat dissipation part 30.
For details, refer to the schematic diagram of a state and a temperature cycle of a refrigerant in a refrigeration path shown in
Referring back to
In the embodiment shown in
When the refrigerant flows into the condenser 321, the condenser 321 is provided with a heat dissipation fin and a fan, so that the refrigerant may be directly heat dissipated through air cooling. In this embodiment, the heat exchanger 31 is disposed opposite to the external pipeline network 300. When flowing through the heat exchanger 31, the refrigerant may implement heat exchange with the external pipeline network 300. A heat carrier (not shown in the figure) flows in the external pipeline network 300, and the external pipeline network 300 and the heat exchanger 31 form a heat exchange connection structure. In some embodiments, the heat exchanger 31 may be implemented in a form of a plate heat exchanger. When flowing through the heat exchanger 31, the refrigerant may implement heat exchange with the heat carrier in the external pipeline network 300. A high temperature of the refrigerant may be transferred to the heat carrier with a relatively low temperature. After the refrigerant heats the heat carrier, a temperature of the refrigerant is relatively decreased to achieve a heat dissipation effect, and a temperature of the heat carrier is relatively increased. The external pipeline network 300 may be connected to a local heating pipe, a hot water pipe, or the like. Correspondingly, the heat carrier may be water, and may be used as heating water or domestic hot water.
In the composite refrigeration system 100, when the equipment room 200 of the data center is refrigerated and heat dissipated, at least a portion of heat generated in a refrigeration process can be transferred to the external pipeline network 300 by using the heat exchanger 31, to implement energy recycle and reuse. Compared with another solution of an embodiment in which the refrigerant is directly heat dissipated by using the cooler 32 alone, the composite refrigeration system 100 has more energy-saving and environment-friendly effects.
For example, it is calculated that heat generated by the composite refrigeration system 100 for one hour of refrigeration is 80 kWh. After operating in the second heat dissipation mode for two hours, the composite refrigeration system 100 may provide 160 kWh of heat to the external pipeline network 300. After operating in the second heat dissipation mode throughout a day, the composite refrigeration system 100 may provide 1920 kWh of heat to the external pipeline network 300. The heat may produce a better heating effect for the external pipeline network 300. In the illustration of
In some embodiments, respective flow quantities of the two first liquid outlet ports of the first three-way valve 51 may be adjusted. The composite refrigeration system 100 is further provided with a controller 60 (refer to
The controller 60 may distribute the flow quantity of the refrigerant based on a heat dissipation requirement of the refrigerant or based on a heating temperature required by the heat carrier. For example, when heat dissipation effects of the condenser 321 and the heat exchanger 31 are different, if the refrigerant needs to obtain a better heat dissipation effect, the controller 60 may control the first three-way valve 51, so that more of the refrigerant flows through a path with a better heat dissipation effect. In this way, a refrigerant with a larger flow quantity can obtain better heat dissipation. For example, when the heat dissipation effect of the condenser 321 is better than that of the heat exchanger 31, the controller 60 may control the first three-way valve 51, so that more of the refrigerant flows out of the first liquid outlet port connected to the condenser 321 and enters the condenser 321 to obtain better heat dissipation. Correspondingly, in this case, a flow quantity of a refrigerant flowing into the heat exchanger 31 from the first liquid outlet port is relatively decreased, and a heating effect of the heat exchanger 31 on the heat carrier is decreased accordingly.
In some embodiments, the controller 60 may further control a difference in the heat dissipation effects between the condenser 321 and the heat exchanger 31 by controlling a fan speed of the condenser 321 or controlling a flow rate of the heat carrier in the external pipeline network 300. That the controller 60 controls the flow rate of the heat carrier in the external pipeline network 300 may be implemented as that the controller 60 directly controls the external pipeline network 300, or that the controller 60 is communicatively connected to a control system of the external pipeline network 300, and the controller 60 indirectly controls the flow rate of the heat carrier. In addition, the heat dissipation effect of the condenser 321 may be worse than a heat exchange effect of the heat exchanger 31. In this scenario, when the refrigerant needs to implement better heat dissipation, the controller 60 needs to control more of the refrigerant to flow into the heat exchanger 31.
The controller 60 controls distribution of the flow quantity of the refrigerant based on the heating temperature required by the heat carrier. This may be implemented based on the following scenario: on a premise that the flow rate of the heat carrier in the external pipeline network 300 is given, if an external ambient temperature is relatively low, an initial temperature of the heat carrier is lower before the heat carrier exchanges heat with the refrigerant at the heat exchanger 31. In this case, through control of the controller 60, a flow quantity of a refrigerant flowing into the heat exchanger 31 is larger, and a temperature of heating the heat carrier by the refrigerant is increased, so that an increasing range of a temperature obtained after heat exchange is performed on the heat carrier is larger. If the external ambient temperature is relatively high, the initial temperature of the heat carrier increases accordingly. In this case, through control of the controller 60, a flow quantity of the refrigerant flowing into the heat exchanger 31 may be smaller, and the temperature of heating the heat carrier by the refrigerant is decreased, so that the increasing range of the temperature obtained after heat exchange is performed on the heat carrier is smaller.
The foregoing application scenario related to the external ambient temperature may be used to seasonally adjust a heat dissipation manner of the composite refrigeration system 100. For example, in winter when the external ambient temperature is relatively low, the controller 60 may control more of the refrigerant to flow into the heat exchanger 31, or control all the refrigerant to flow into the heat exchanger 31, so that the heat carrier with a relatively low temperature in the external pipeline network 300 obtains a greater temperature rise through heat exchange; while in summer when the external ambient temperature is relatively high, the controller 60 may control more of the refrigerant to flow into the condenser 321, or control all the refrigerant to flow into the condenser 321, so that the heat carrier with a relatively high temperature in the external pipeline network 300 obtains a smaller temperature rise or a temperature rise of zero through exchange. It may be understood that when the external pipeline network 300 is a heating pipeline network, the external pipeline network 300 does not need to operate in summer, and therefore the heat carrier does not need to form heat exchange with the composite refrigeration system 100. When the external pipeline network 300 is a hot water pipe, an amount of hot water used in summer and a temperature of use are decreased accordingly, and the heating temperature required by the heat carrier is also decreased accordingly.
In an embodiment, still referring to
In this embodiment, a real-time temperature value of the equipment room 200 of the data center detected by the temperature sensor 70 may be used to determine a range of cooling, by the refrigeration part 20, air sent into the equipment room 200 of the data center. When the temperature of the equipment room 200 of the data center is relatively low, the range of cooling the air by the refrigeration part 20 by using the refrigerant is also decreased accordingly. In this case, heat absorbed by a refrigerant in the refrigeration part 20 through evaporation is also decreased accordingly, and a temperature rise range of the refrigerant in a refrigeration process is decreased accordingly. Therefore, heat that can be supplied by the refrigerant to the heat carrier through exchange in the heat exchanger 31 is decreased accordingly, and a heating effect of the heat carrier is reduced. In this case, the controller 60 controls the first three-way valve 51, so that more of the refrigerant may be distributed to flow into the heat exchanger 31, and further, more exchangeable heat is provided for the heat carrier, to maintain a heating effect of the refrigerant on the heat carrier. Conversely, when the real-time temperature value of the equipment room 200 of the data center detected by the temperature sensor 70 is relatively high, the heat that can be supplied by the refrigerant to the heat carrier in the heat exchanger 31 is increased. In this case, the controller 60 controls the first three-way valve 51, so that more of the refrigerant may be distributed to flow into the condenser 321 for direct heat dissipation, less exchangeable heat is provided by the refrigerant in the heat exchanger 31, and the heating effect of the refrigerant on the heat carrier is more balanced.
In an embodiment, the controller 60 is alternatively communicatively connected to the server 201 in the equipment room 200 of the data center for monitoring a real-time workload of the server 201 and then controlling flow distribution of a refrigerant in the first three-way valve 51 based on the workload. The temperature in the equipment room 200 of the data center is further related to the workload of the server 201. When the workload of the server 201 is relatively heavy, heat generated when the server 201 operates is relatively high, and the composite refrigeration system 100 needs to increase a refrigerating intensity of the server 201, to reduce a temperature of air sent into the equipment room 200 of the data center. In this way, an ambient temperature in the equipment room 200 of the data center is relatively balanced. The ambient temperature is not increased accordingly with an increase of the workload of the server 201, and operation efficiency of the server 201 is not affected. It may be understood that a refrigerating intensity of the composite refrigeration system 100 is increased, and a temperature of a refrigerant flowing out of the refrigeration part 20 is also increased accordingly. In this case, the controller 60 needs to distribute more of the refrigerant to the condenser 321 for heat dissipation, to reduce a flow quantity of the refrigerant in the heat exchanger 31. Such control may make heat supplied by the refrigerant in the heat exchanger 31 to the heat carrier relatively constant. The heat carrier does not obtain more heat with an increase of a temperature of the refrigerant, and it is ensured that the heat carrier achieves a more balanced heating effect. Conversely, when the workload of the server 201 is relatively low, relatively less heat is generated in an operation process of the server 201, and a refrigerating intensity of the refrigeration part 20 on the air by using the refrigerant is decreased. In this case, the controller 60 may distribute more of the refrigerant to flow into the heat exchanger 31, to maintain the heating effect of the refrigerant on the heat carrier.
Because there may be a plurality of servers 201 in the equipment room 200 of the data center, that the controller 60 is communicatively connected to the server 201 may be that the controller 60 is separately communicatively connected to the plurality of servers 201, and separately monitors workloads of the servers 201. Finally, a flow quantity of the refrigerant is distributed in a manner of calculating an average value. In some other embodiments, the controller 60 may be alternatively communicatively connected to only one or some of the servers 201 in the equipment room 200 of the data center and distribute the flow quantity of the refrigerant based on a workload of the one or some of the servers 201. All the foregoing implementations may ensure that the heating effect of the refrigerant on the heat carrier in the external pipeline network 300 is consistent when the composite refrigeration system 100 operates effectively.
In some other implementations, the controller 60 may alternatively receive the temperature value obtained through monitoring by the temperature sensor 70 and workload data of the server 201 at the same time, and distribute a flow quantity of the refrigerant in the heat dissipation part 30 based on the temperature value in the equipment room 200 of the data center and a workload status of the server 201 at the same time, to ensure a refrigerating effect of the composite refrigeration system 100 and the heating effect on the heat carrier at the same time.
It should be noted that, in the foregoing embodiment, the first three-way valve 51 may be alternatively replaced with two solenoid valves (not shown in the figure). One solenoid valve is connected between the second pipeline 42 and the condenser 321, and the other solenoid valve is connected between the second pipeline 42 and the heat exchanger 31. The controller 60 is configured to simultaneously control the two solenoid valves to be linked and may also have the foregoing effect of distributing a flow quantity of the refrigerant.
In addition, when the composite refrigeration system 100 is applied to another operation scenario other than the data center, the controller 60 may also be communicatively connected to a heat source in the another operation scenario, and accordingly adjust flow distribution of the refrigerant by monitoring a workload of the heat source in real time, to achieve a corresponding effect of controlling the heat dissipation mode of the heat dissipation part 30.
For illustration of another embodiment of the composite refrigeration system 100, refer to
The heat dissipation part 30 also includes the heat exchanger 31, and the heat exchanger 31 is connected between the second pipeline 42 and the first pipeline 41 and is also disposed opposite to the external pipeline network 300. When flowing through the heat exchanger 31, the refrigerant may implement heat exchange with the heat carrier in the external pipeline network 300. In this embodiment, the refrigerant is directly heat dissipated only by using the heat exchanger 31, and the heat is transferred to the heat carrier. The dry cooler 322 is connected in parallel to the external pipeline network 300. The heat carrier that completes heat exchange with the refrigerant may flow directly into a rear end of the external pipeline network 300 or may flow into the dry cooler 322 at least partially. After the dry cooler 322 performs air-cooled heat dissipation on the heat carrier, the heat carrier then flows into the rear end of the external pipeline network 300. By controlling a flow quantity of a heat carrier flowing into the dry cooler 322, a heat dissipation effect of the dry cooler 322 on the heat carrier may be controlled, so that the heat dissipation effect is formed on the refrigerant when the heat carrier obtained after being heat dissipated performs heat exchange with the refrigerant again. In other words, in this embodiment, the dry cooler 322 indirectly controls a heat dissipation effect of the refrigerant by controlling heat dissipation of the heat carrier.
In the composite refrigeration system 100 in this embodiment, when the heat carrier flows only in the external pipeline network 300 and does not enter the dry cooler 322 for heat dissipation (that is, the second heat dissipation mode), all heat in the refrigerant is exchanged to the heat carrier. In this way, an energy recycling efficiency of the composite refrigeration system 100 is relatively high, and a heating effect on the heat carrier is relatively strong. However, when all the heat carrier enters the dry cooler 322 for heat dissipation (that is, the first heat dissipation mode), a temperature of the heat carrier flowing into the rear end of the external pipeline network 300 is lower, or the heat exchanger 31 and the dry cooler 322 directly form a heat dissipation path. The composite refrigeration system 100 no longer conveys the heat carrier to the external pipeline network 300. In this case, the energy recycling efficiency of the composite refrigeration system 100 is relatively low.
In an embodiment, the composite refrigeration system 100 further includes a second three-way valve 52. The second three-way valve 52 is connected between the heat exchanger 31, the external pipeline network 300, and the dry cooler 322, and is configured to control the flow quantity of the heat carrier flowing into the dry cooler 322 for heat dissipation and distribution of a flow quantity of the heat carrier flowing into the rear end of the external pipeline network 300, that is, control the heat dissipation mode of the heat dissipation part 30. The second three-way valve 52 includes one second liquid inlet port and two second liquid outlet ports. The second liquid inlet port is connected to the heat exchanger 31, one second liquid outlet port is connected to the dry cooler 322, and the other second liquid outlet port is connected to the rear end of the external pipeline network 300. Therefore, the heat carrier that completes heat exchange from the heat exchanger 31 may flow into the second three-way valve 52 through the second liquid inlet port, and flow into the dry cooler 322 through the second liquid outlet port for heat dissipation, or directly flow into the rear end of the external pipeline network 300 through the other second liquid outlet port separately.
Similar to the embodiments shown in
In an embodiment, as shown in
Therefore, referring to
In addition, in the illustration of
However, as mentioned above, that the refrigeration part 20 is located in the circulating ventilation channel 10 is represented as follows: The evaporator 22 is disposed in the circulating ventilation channel 10 in the illustration of
Correspondingly, in the illustration of
In the illustration of
In an embodiment, referring to
After pre-heat dissipation of the external air is completed at the heat exchange core 13, the external air enters the cooler 32 (shown as the condenser 321 in
In this embodiment, because the heat exchange core 13 occupies space, the heat exchanger 31 and the compressor 23 may be alternatively disposed in the circulating ventilation channel 10, to increase an integration degree of the composite refrigeration system 100.
In the embodiment shown in
The foregoing descriptions are merely embodiments, but are not intended as limiting. Any variation or replacement readily figured out by a person skilled in the art within the scope of the embodiments, for example, removing or adding a mechanical part, or changing a shape of a mechanical part, shall fall within the scope of the embodiments. The embodiments and the features in the embodiments can be combined with each other provided that there is no conflict.
Number | Date | Country | Kind |
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202110650465.1 | Jun 2021 | CN | national |