Temperature control cooling device

Abstract

The utility model discloses a temperature control cooling device, which belongs to the technical field of cooling equipment, and comprises a heat exchanger, a refrigeration flow path and a cooling flow path, and the heat exchanger is provided with a first heat exchange flow path and a second heat exchange flow path; the refrigeration flow path comprises a main flow path and a bypass branch, a first heat exchange flow path is arranged on the main flow path, a compressor, a condenser and a throttling element which are sequentially connected are arranged on the main flow path, the condenser and the throttling element are arranged between an outlet of the compressor and an inlet of the first heat exchange flow path, and the main flow path can introduce a refrigerant into the first heat exchange flow path; the two ends of the bypass branch are connected with an inlet of the first heat exchange flow channel and an outlet of the first heat exchange flow channel correspondingly, and a bypass control valve is arranged on the bypass branch and used for controlling the bypass branch to be connected and disconnected. The cooling flow path is provided with a second heat exchange flow channel, the cooling flow path can introduce the cooling liquid into the second heat exchange flow channel, the temperature control precision can be improved, and the high-precision performance test requirement can be met.

Description

Technical Field

[0001] This utility model relates to the field of cooling equipment technology, and in particular to a temperature-controlled cooling device. Background Technology

[0002] For laboratory projects, the cooling equipment needs to provide a constant temperature coolant to the test load to cool it. However, unstable coolant supply temperature can directly cause changes in the performance of the test load, resulting in inaccurate test data.

[0003] In related technologies, conventional cooling equipment has low temperature control accuracy, making it difficult to meet the requirements of high-precision performance testing. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a temperature-controlled cooling device, which helps improve temperature control accuracy and meets the requirements of high-precision performance testing.

[0005] The temperature-controlled cooling device according to an embodiment of the present invention includes: a heat exchanger having a first heat exchange channel and a second heat exchange channel; a refrigeration flow path including a main flow path and a bypass branch, wherein the main flow path has a first heat exchange channel, and a compressor, a condenser, and a throttling element are sequentially connected on the main flow path, the condenser and the throttling element being located between the outlet of the compressor and the inlet of the first heat exchange channel, the main flow path being able to pass refrigerant into the first heat exchange channel to provide cooling capacity to the heat exchanger, the two ends of the bypass branch being connected to the inlet and outlet of the first heat exchange channel respectively, and the bypass branch being provided with a bypass control valve for controlling the opening and closing of the bypass branch; and a cooling intake flow path having a second heat exchange channel, wherein the cooling intake flow path is able to pass coolant into the second heat exchange channel to absorb cooling capacity from the heat exchanger.

[0006] The temperature-controlled cooling device according to an embodiment of this utility model has at least the following beneficial effects: The temperature-controlled cooling device includes a refrigeration flow path and a cooling intake flow path. The refrigeration flow path includes a main flow path and a bypass branch path. The main flow path includes a compressor, a condenser, and a throttling element connected in sequence. Under the cooperative action of the compressor, condenser, and throttling element, the cooled refrigerant can be introduced into the first heat exchange channel, thereby providing cooling capacity to the heat exchanger. The cooling intake flow path is provided with a second heat exchange channel, which allows coolant to be introduced into the second heat exchange channel. The coolant and refrigerant exchange heat at the heat exchanger, and the coolant can absorb the cooling capacity provided by the refrigerant, thereby reducing the temperature of the coolant. The cooling flow path supplies the cooled liquid to the load end, thereby meeting the heat dissipation requirements of the load end. The temperature-controlled cooling device also has a bypass branch at the cooling flow path, and a bypass control valve is installed on the bypass branch. The bypass control valve is used to control the opening and closing of the bypass branch. After the temperature of the coolant meets the preset value, according to the load change at the load end, the temperature-controlled cooling device can control the connection between the bypass branch and the main flow path by opening the bypass control valve, thereby increasing the temperature adjustment range of the cooling flow path and accelerating the adjustment speed of the cooling flow path to meet different load conditions at the load end, thereby improving the temperature control accuracy of the temperature-controlled cooling device and meeting the requirements of high-precision performance testing.

[0007] According to some embodiments of the present invention, a first control valve is also provided on the main flow path. The first control valve is located between the condenser and the inlet of the throttling element to control the opening and closing of the main flow path and the first heat exchange channel.

[0008] According to some embodiments of the present invention, the bypass branch includes a first branch, the bypass control valve includes a second control valve, the two ends of the first branch are respectively connected to the inlet of the condenser and the outlet of the first heat exchange channel, and the second control valve is used to control the on / off state of the first branch.

[0009] According to some embodiments of the present invention, the bypass branch includes a second branch, the bypass control valve includes a third control valve, the two ends of the second branch are respectively connected to the inlet of the first control valve and the outlet of the first heat exchange channel, and the third control valve is used to control the on / off state of the second branch.

[0010] According to some embodiments of the present invention, the cooling flow path includes an external circulation flow path and an internal circulation flow path. The external circulation flow path is used to provide coolant to the load end. A mixing water tank is provided on the external circulation flow path. A second heat exchange flow path is provided on the internal circulation flow path and is connected to the second heat exchange flow path. The inlet of the internal circulation flow path is connected to the outlet of the mixing water tank, and the outlet of the internal circulation flow path is connected to the inlet of the mixing water tank.

[0011] According to some embodiments of this utility model, the external circulation path is provided with a first filter, an external circulation pump and a flow control valve connected in sequence. The inlet of the first filter is connected to the outlet of the mixing tank, and the outlet of the flow control valve is connected to the inlet of the mixing tank.

[0012] According to some embodiments of the present invention, a first temperature sensor is provided between the external circulation pump and the flow control valve in the external circulation flow path; the temperature control cooling device has a first state, in which the detection value of the first temperature sensor is greater than a first preset value, the first control valve is open, and the second control valve and the third control valve are both closed.

[0013] According to some embodiments of this utility model, the main flow path is further provided with a second temperature sensor for detecting the suction temperature of the compressor; the temperature control cooling device has a second state and a third state; the second state is that the detection value of the first temperature sensor is less than or equal to a first preset value, and the detection value of the second temperature sensor is less than the second preset value, the second control valve is open, and both the first control valve and the third control valve are closed; the third state is that the detection value of the first temperature sensor is less than or equal to the first preset value, and the detection value of the second temperature sensor is greater than the third preset value, the third control valve is open, and both the first control valve and the second control valve are closed.

[0014] According to some embodiments of this utility model, the internal circulation path is provided with a second filter, an internal circulation pump and a flow switch connected in sequence. The inlet of the second filter is connected to the outlet of the mixing tank, and the outlet of the flow switch is connected to the inlet of the second heat exchange channel.

[0015] According to some embodiments of the present invention, the cooling flow path further includes a branch path, one end of which is connected to the outlet of the external circulation pump and the other end is connected to the inlet of the mixing tank. A branch path control valve is provided on the branch path, which is used to control the opening and closing of the branch path.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a temperature-controlled cooling device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection between the temperature control and cooling device and the load end in one embodiment of the present invention.

[0020] Icon labels:

[0021] 100. Heat exchanger; 110. First heat exchange channel; 120. Second heat exchange channel;

[0022] 210. Main circuit; 211. Compressor; 212. Condenser; 213. Throttling element; 214. First control valve; 215. Second temperature sensor; 220. First branch circuit; 221. Second control valve; 230. Second branch circuit; 231. Third control valve;

[0023] 310. External circulation path; 311. Mixing tank; 312. First filter; 313. External circulation pump; 314. Flow control valve; 315. First temperature sensor; 320. Internal circulation path; 321. Second filter; 322. Internal circulation pump; 323. Flow switch;

[0024] 410. Third branch; 411. Fourth control valve; 420. Fourth branch; 421. Fifth control valve; 422. Needle valve; 423. Ion tank;

[0025] 500, Load side. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] For the client's requirements in the laboratory project, the cooling equipment needs to provide a constant-temperature coolant to the test load end 500 to achieve cooling. However, unstable coolant supply temperature directly leads to changes in the test load's performance, resulting in inaccurate test data. Currently, the temperature control accuracy of cooling equipment in the industry is generally controlled within ±1~2℃. For some equipment with higher temperature control requirements, conventional cooling equipment is no longer sufficient to meet performance requirements. Therefore, a device with higher temperature control accuracy and more stable flow rate is needed.

[0031] Reference Figure 1 and Figure 2 As shown, a temperature-controlled cooling device according to an embodiment of the present invention includes: a heat exchanger 100, a refrigeration flow path and a cooling intake flow path. The temperature-controlled cooling device has higher temperature control accuracy and more stable flow rate.

[0032] Reference Figure 1 and Figure 2 As shown, the heat exchanger 100 has a first heat exchange channel 110 and a second heat exchange channel 120. The heat exchanger 100 can be made of metal material and has good thermal conductivity to improve the heat exchange efficiency between the fluid in the first heat exchange channel 110 and the fluid in the second heat exchange channel 120.

[0033] Reference Figure 1 and Figure 2 As shown, the refrigeration flow path includes a main flow path 210 and a bypass branch. The heat exchanger 100 is located on the path of the main flow path 210. The main flow path 210 can be connected to the first heat exchange channel 110. Specifically, the main flow path 210 is provided with a compressor 211, a condenser 212, a first control valve 214 and a throttling element 213 connected in sequence. The condenser 212, the first control valve 214 and the throttling element 213 are located between the outlet of the compressor 211 and the inlet of the first heat exchanger 100. The first control valve 214 is used to control the opening and closing of the main flow path 210 and the first heat exchange channel 110.

[0034] Reference Figure 1 and Figure 2 As shown, compressor 211 can compress low-temperature, low-pressure gaseous refrigerant into high-temperature, high-pressure gas and provide power for the refrigeration cycle. The high-temperature, high-pressure gaseous refrigerant is conducted to condenser 212, which can cool and condense the high-temperature, high-pressure gaseous refrigerant into high-pressure liquid. When the first control valve 214 is opened, the high-pressure liquid refrigerant can be conducted to throttling element 213. Through throttling and pressure reduction by throttling element 213, the high-pressure liquid refrigerant becomes a low-temperature, low-pressure mist-like liquid (partially liquefied). Then, the low-temperature, low-pressure mist-like liquid refrigerant is introduced into the first heat exchange channel 110 to increase the amount of cooling released by the refrigerant to the heat exchanger 100 and improve the heat exchange efficiency of the heat exchanger 100.

[0035] Reference Figure 1 and Figure 2 As shown, the heat exchanger 100 is arranged along the cooling flow path, which is connected to the second heat exchange channel 120. The cooling flow path allows coolant to flow into the second heat exchange channel 120, enabling heat exchange between the refrigerant in the first heat exchange channel 110 and the coolant in the second heat exchange channel 120. The coolant absorbs the cooling energy provided by the refrigerant, thereby reducing its temperature. The cooling flow path then supplies the cooled coolant to the load end 500, thus meeting the heat dissipation requirements of the load end 500. The refrigerant can be Freon, and the coolant can be liquid water.

[0036] Reference Figure 1 and Figure 2 As shown, there are two main types of traditional temperature control technologies. One is to directly cool the coolant through the compressor 211 of the cooling equipment and control the temperature of the coolant to be directly output to the load end 500. The other is to mix the hot water returning from the load end 500 with the cold water produced by the cooling equipment in a certain ratio to achieve a constant temperature before outputting it to the load end 500.

[0037] Reference Figure 1 and Figure 2 As shown, due to the limited temperature regulation range of compressor 211, the heat output at the test load end of 500 is not constant, with low load and maximum load conditions. This causes the adjustment speed of compressor 211 to lag behind, resulting in low temperature control accuracy of traditional refrigeration equipment. Specifically, when the coolant temperature decreases, the cooling capacity cannot be automatically adjusted; it can only be adjusted by the compressor 211's own frequency conversion capability. When the adjustment range exceeds the compressor 211's own adjustment range, compressor 211 will shut down. When cooling is needed again, compressor 211 will restart, but by then the required time has exceeded the temperature control requirements.

[0038] Reference Figure 1 and Figure 2 As shown, the temperature-controlled cooling device provided in this embodiment of the present invention has a bypass branch, and a bypass control valve is provided on the bypass branch. The bypass control valve is used to control the opening and closing of the bypass branch. After the temperature of the coolant meets the preset value, according to the load change of the load end 500, the temperature-controlled cooling device can control the connection between the bypass branch and the main flow path 210 by opening the bypass control valve, thereby increasing the temperature adjustment range of the refrigeration flow path and accelerating the adjustment speed of the refrigeration flow path to meet different load conditions of the load end 500, thereby improving the temperature control accuracy of the temperature-controlled cooling device and meeting the requirements of high-precision performance testing.

[0039] Reference Figure 1 and Figure 2 As shown, it should be noted that the throttling element 213 can be an expansion valve, capillary tube, or other components.

[0040] Reference Figure 1 and Figure 2 As shown, it should be noted that the connection of one end of the bypass branch to the inlet of the first heat exchange channel 110 means that the end of the bypass branch can be directly connected to the inlet of the first heat exchange channel 110, or it can be indirectly connected to the inlet of the first heat exchange channel 110 through multiple components. The connection of the other end of the bypass branch to the outlet of the first heat exchange channel 110 means that the end of the bypass branch can be directly connected to the outlet of the first heat exchange channel 110, or it can be indirectly connected to the outlet of the first heat exchange channel 110 through multiple components.

[0041] Reference Figure 1 and Figure 2 As shown, it can be understood that the bypass branch includes a first branch 220, and the bypass control valve includes a second control valve 221. The two ends of the first branch 220 are connected to the inlet of the condenser 212 and the outlet of the first heat exchange channel 110, respectively. The second control valve 221 is used to control the opening and closing of the first branch 220.

[0042] Reference Figure 1 and Figure 2 As shown, when the temperature of the coolant reaches the preset value and the suction temperature of the compressor 211 is lower than the set value, the temperature control cooling device can open the second control valve 221 and close the first control valve 214, so that the refrigerant does not enter the condenser 212, the throttling element 213 and the first heat exchange channel 110, and flows from the first branch 220 to the inlet of the compressor 211, so that the suction temperature increases, which can reduce the cooling capacity output of the heat exchanger 100 by the cooling channel, and can meet the low load conditions of the load end 500.

[0043] Reference Figure 1 and Figure 2 As shown, it can be understood that the bypass branch includes a second branch 230, and the bypass control valve includes a third control valve 231. The two ends of the second branch 230 are respectively connected to the inlet of the first control valve 214 and the outlet of the first heat exchange channel 110. The third control valve 231 is used to control the on / off state of the second branch 230.

[0044] Reference Figure 1 and Figure 2 As shown, when the temperature of the coolant reaches the preset value and the suction temperature of the compressor 211 is higher than the set value, the temperature control cooling device can open the third control valve 231 and close the first control valve 214 and the second control valve 221, so that the refrigerant enters the second branch 230 after passing through the condenser 212. Through the cooling and condensation of the condenser 212, the temperature of the refrigerant is reduced, which can increase the cooling capacity of the refrigeration flow path to the heat exchanger 100, and can meet the high load conditions of the load end 500.

[0045] Reference Figure 1 and Figure 2 As shown, the temperature-controlled cooling device, through the cooperation of the first control valve 214, the second control valve 221 and the third control valve 231, can meet the heat dissipation requirements of the load end 500 while reducing the dependence on the frequency conversion capability adjustment of the compressor 211, and actively adjust the output cooling capacity of the heat exchanger 100 through the refrigeration flow path. This is beneficial to improving the temperature adjustment range and the temperature adjustment speed, and can more quickly meet the operating requirements of the load end 500 from low load to high load, thereby improving the temperature control accuracy of the temperature-controlled cooling device, so that the temperature control accuracy of the coolant of the temperature-controlled cooling device can reach ±0.1℃.

[0046] Reference Figure 1 and Figure 2 As shown, it can be understood that the cooling flow path includes an external circulation flow path 310 and an internal circulation flow path 320. The external circulation flow path 310 is used to provide coolant to the load end 500. A mixing water tank 311 is provided on the external circulation flow path 310. A second heat exchange flow channel 120 is provided on the internal circulation flow path 320 and is connected to the second heat exchange flow channel 120. The inlet of the internal circulation flow path 320 is connected to the outlet of the mixing water tank 311, and the outlet of the internal circulation flow path 320 is connected to the inlet of the mixing water tank 311.

[0047] Reference Figure 1 and Figure 2 As shown, the external circulation path 310 supplies the cooled coolant to the load end 500 and receives the cooled coolant that has flowed through the load end 500 and been heated. The heated coolant is then introduced into the mixing tank 311. The inlet of the internal circulation path 320 is connected to the outlet of the mixing tank 311, so that a portion of the coolant flowing out of the mixing tank 311 is introduced into the second heat exchange path 120. Through the heat exchange of the heat exchanger 100, a portion of the coolant is cooled. The outlet of the internal circulation path 320 is connected to the inlet of the mixing tank, so that the cooled coolant is introduced into the mixing tank 311. The cooled coolant and the heated coolant are mixed in the mixing tank 311, thereby adjusting the temperature of the coolant output from the external circulation path 310 to the load end 500 to meet the heat dissipation requirements of the load end 500.

[0048] Reference Figure 1 and Figure 2 As shown, it can be understood that, specifically, the external circulation path 310 is provided with a first filter 312, an external circulation pump 313 and a flow control valve 314 connected in sequence. The inlet of the first filter 312 is connected to the outlet of the mixing tank 311, and the outlet of the flow control valve 314 is connected to the inlet of the mixing tank 311.

[0049] Reference Figure 1 and Figure 2As shown, the coolant flowing out of the mixing tank 311 can flow to the first filter 312. The first filter 312 can be used to remove impurities and particulate matter mixed in the coolant, thereby reducing the risk of pipe blockage and flow control failure.

[0050] Reference Figure 1 and Figure 2 As shown, the external circulation pump 313 can provide power for the output of coolant, and the flow control valve 314 can be a manual control valve. The user can manually adjust the opening of the flow control valve 314 according to the expected load of the load end 500 so that the coolant supply can meet the heat dissipation requirements of the load end 500 and reduce energy waste.

[0051] Reference Figure 1 and Figure 2 As shown, it can be understood that the internal circulation path 320 is provided with a second filter 321, an internal circulation pump 322 and a flow switch 323 connected in sequence. The inlet of the second filter 321 is connected to the outlet of the mixing tank 311, and the outlet of the flow switch 323 is connected to the inlet of the second heat exchange channel 120.

[0052] Reference Figure 1 and Figure 2 As shown, the coolant entering the internal circulation path 320 passes sequentially through the second filter 321, the internal circulation pump 322, the flow switch 323, and the second heat exchange channel 120 of the heat exchanger 100 to achieve cooling. The coolant can flow to the second filter 321, which can be used to remove impurities and particulate matter mixed in the coolant, thereby reducing the risk of pipe blockage and flow control failure.

[0053] Reference Figure 1 and Figure 2 As shown, the internal circulation pump 322 provides power for the delivery of coolant in the internal circulation path 320, and the flow switch 323 is used to monitor the flow status of coolant in the internal circulation path 320 and to trigger protection, alarm or control logic to ensure the safe operation of the temperature control cooling device.

[0054] Traditional mixing solutions involve PID (Proportional-Integral-Derivative) regulation of a proportional three-way valve or PID regulation of two solenoid valves. During the regulation process, flow fluctuations will occur, which will also lead to changes in load performance. Similarly, valves will have opening delays during the regulation process, resulting in a decrease in the temperature control accuracy of traditional cooling equipment.

[0055] Reference Figure 1 and Figure 2As shown, the traditional flow path is controlled by a variable valve with a real-time change in opening. The hot water returning from the load end 500 after absorbing heat is mixed with the cold water produced by the refrigeration unit in a certain proportion. After reaching the required supply temperature, the mixture is then pumped to the load end 500. Because the opening control of the variable valve is curved, the opening value at a certain point will cause a sudden change in flow rate, resulting in flow fluctuations and failure to meet project requirements. This leads to a decrease in the temperature control accuracy of the traditional cooling equipment.

[0056] Reference Figure 1 and Figure 2 As shown, the temperature-controlled cooling device provided in this embodiment of the present invention eliminates the variable valves that change the opening degree in real time in both the external circulation flow path 310 and the internal circulation flow path 320. The external circulation flow path 310 continuously supplies liquid to the load end 500, so that the flow rate of the load end 500 remains stable. After the internal circulation flow path 320 exchanges heat with the heat exchanger 100, it outputs a constant coolant and passes the cooled coolant into the mixing tank 311 to achieve complementary interference with the external circulation flow path 310. This also ensures the stability of the temperature-controlled cooling device, helps to reduce flow fluctuations in the flow path, makes the coolant supply more stable, and thus improves the temperature control accuracy of the temperature-controlled cooling device.

[0057] Reference Figure 1 and Figure 2 As shown, it should be noted that PID control is a classic control algorithm that dynamically adjusts the three components of P (integral), I (integral), and D (derivative) to make the output of the flow path reach the set value.

[0058] Reference Figure 1 and Figure 2 As shown, it can be understood that the external circulation path 310 has a first temperature sensor 315 between the external circulation pump 313 and the flow control valve 314; the temperature control cooling device has a first state, in which the detection value of the first temperature sensor 315 is greater than a first preset value, the first control valve 214 is open, and the second control valve 221 and the third control valve 231 are both closed.

[0059] Reference Figure 1 and Figure 2 As shown, the temperature control cooling device also includes a controller, which is electrically connected to the first temperature sensor 315. The first control valve 214, the second control valve 221 and the third control valve 231 are all electrically controlled valves. The controller is configured to control the opening and closing of the first control valve 214, the second control valve 221 and the third control valve 231 according to the detection value of the first temperature sensor 315.

[0060] Reference Figure 1 and Figure 2As shown, specifically, the temperature-controlled cooling device has a first state, in which the detection value of the first temperature sensor 315 is greater than the first preset value, that is, the coolant in the external circulation path 310 has not reached the preset temperature. The controller can control the first control valve 214 to open and the second control valve 221 and the third control valve 231 to close, that is, to block the connection between the bypass branch and the main path 210, so that the cooled refrigerant is introduced into the heat exchanger 100 to realize the heat exchange between the refrigerant in the first heat exchange channel 110 and the coolant in the second heat exchange channel 120, so that the temperature of the coolant in the external circulation path 310 is further reduced to the preset temperature.

[0061] Reference Figure 1 and Figure 2 As shown, it can be understood that the main flow path 210 is also equipped with a second temperature sensor 215 for detecting the suction temperature of the compressor 211. Both the first temperature sensor 315 and the second temperature sensor are connected to the controller, and the first control valve 214, the second control valve 221, and the third control valve 231 are all electrically connected to the controller. The controller is configured to control the opening and closing of the first control valve 214, the second control valve 221, and the third control valve 231 based on the detection values ​​of the first temperature sensor 315 and the second temperature sensor 215.

[0062] Reference Figure 1 and Figure 2 As shown, the temperature-controlled cooling device has a second state and a third state. In the second state, the detection value of the first temperature sensor 315 is less than or equal to the first preset value, that is, the coolant in the external circulation path 310 has reached the preset temperature, and the detection value of the second temperature sensor 215 is less than the second preset value, that is, the suction temperature of the compressor 211 inlet is lower than the preset value. The controller can control the second control valve 221 to open, and the first control valve 214 and the third control valve 231 to close, so that the refrigerant does not enter the condenser 212, the throttling element 213 and the first heat exchange path 110, and flows from the first branch 220 to the inlet of the compressor 211, so that the suction temperature increases, which can reduce the cooling capacity of the refrigeration path to the heat exchanger 100, and can meet the low load conditions of the load end 500.

[0063] Reference Figure 1 and Figure 2As shown, in the third state, the detection value of the first temperature sensor 315 is less than or equal to the first preset value, that is, the coolant at the external circulation path 310 has reached the preset temperature, and the detection value of the second temperature sensor 215 is greater than the third preset value, that is, the suction temperature at the inlet of the compressor 211 is higher than the third preset value. The controller can control the third control valve 231 to open, and the first control valve 214 and the second control valve 221 to close, so that the refrigerant enters the second branch 230 after passing through the condenser 212. Through the condensation of the condenser 212, the temperature of the refrigerant is reduced, which can increase the cooling capacity of the refrigeration path to the heat exchanger 100, and can meet the high load conditions of the load side 500.

[0064] Reference Figure 1 and Figure 2 As shown, after the temperature sensor 315 detects a value that reaches a first preset value, the temperature control cooling device can switch between a second state and a third state to control the suction temperature of the compressor 211 within a set range.

[0065] Reference Figure 1 and Figure 2 As shown, the temperature-controlled cooling device, through the cooperation of the first control valve 214, the second control valve 221 and the third control valve 231, can meet the heat dissipation requirements of the load end 500 while reducing the dependence on the frequency conversion capability adjustment of the compressor 211, and actively adjust the output cooling capacity of the heat exchanger 100 through the refrigeration flow path. This is beneficial to improve the temperature adjustment range and the temperature adjustment speed, and more quickly meet the operating requirements of the load end 500 from low load to high load, thereby improving the temperature control accuracy of the temperature-controlled cooling device.

[0066] It should be noted that the first preset value, the second preset value, and the third preset value can be a range.

[0067] It should be noted that the setting values ​​of the second preset value and the third preset value can be the same or different.

[0068] Reference Figure 1 and Figure 2 As shown, it can be understood that the main flow path 210 is connected in sequence between the condenser 212 and the first control valve 214 with a dryer filter and a sight glass. One end of the second branch path 230 is located between the sight glass and the first control valve 214, that is, the refrigerant passes through the dryer filter and the sight glass in sequence. The dryer filter is used to intercept impurities such as metal scraps, welding slag, oxide scale, and lubricating oil carbides that may be carried by the refrigerant during the circulation process, preventing them from flowing into the throttling element 213. The sight glass plays a role in observing the refrigerant flow state, assisting in judging the refrigerant charge amount, and verifying the drying and filtering effect, so as to ensure the normal operation of the refrigeration flow path.

[0069] Reference Figure 1 and Figure 2 As shown, it can be understood that the cooling flow path also includes a branch path. One end of the branch path is connected to the outlet of the external circulation pump 313, and the other end is connected to the inlet of the mixing tank 311. A branch path control valve is provided on the branch path, which is used to control the opening and closing of the branch path.

[0070] Reference Figure 1 and Figure 2 As shown, the diversion branch can regulate the flow rate and temperature. After the diversion control valve is opened, a portion of the coolant can be directly diverted to the inlet of the mixing tank 311, thereby regulating the flow rate of the coolant flowing through the load end 500 and preventing the flow rate from being too high or too low. When the demand at the load end 500 decreases, the diversion branch can divert a portion of the coolant, reducing unnecessary energy consumption, improving operating efficiency, and preventing the temperature-controlled cooling device from overloading. At the same time, mixing the low-temperature coolant flowing through the diversion branch with the heated coolant flowing through the load end 500 can regulate the temperature of the coolant, allowing the temperature of the coolant output from the external circulation path 310 to quickly reach the first preset value.

[0071] Reference Figure 1 and Figure 2 As shown, it can be understood that the diversion branch includes a third branch 410, and the diversion control valve includes a fourth control valve 411. The fourth control valve 411 is located on the third branch 410 and is used to control the on / off state of the third branch 410. One end of the third branch 410 is located between the first temperature sensor 315 and the flow control valve 314 and is connected to the external circulation path 310. The other end of the third branch 410 is connected to the inlet of the mixing tank 311.

[0072] Reference Figure 1 and Figure 2 As shown, the third branch 410 can regulate the flow and temperature. After the diversion control valve is opened, part of the coolant can be directly diverted to the inlet of the mixing tank 311, that is, to regulate the coolant supplied to the load end 500, so as to regulate the flow of coolant flowing through the load end 500 and avoid the flow being too large or too small. When the demand of the load end 500 decreases, the diversion branch can divert part of the coolant, reduce unnecessary energy consumption, improve operating efficiency, and prevent the temperature control cooling device from being overloaded.

[0073] Reference Figure 1 and Figure 2 As shown, the diversion branch also includes a fourth branch 420, and the diversion control valve includes a fifth control valve 421. The fourth branch 420 is sequentially connected to the fifth control valve 421, a needle valve 422, and an ion tank 423. The inlet of the fifth control valve 421 is located between the first temperature sensor 315 and the flow control valve 314 and is connected to the external circulation path 310. The outlet of the ion tank 423 is connected to the inlet of the mixing tank 311.

[0074] Reference Figure 1 and Figure 2 As shown, the fourth branch 420, while diverting the coolant, also serves a purification function. The coolant flowing into the fourth branch 420 passes sequentially through the needle valve 422 and the ion exchange tank 423. The needle valve 422 controls the flow rate of the coolant through the fourth branch 420, thereby optimizing the flow distribution of the fourth branch 420 and ensuring that the temperature and pressure of the external circulation path 310 are in an ideal state. The ion exchange tank 423 is usually filled with ion exchange resin or other filter media to remove ionic contaminants from the coolant, thereby preventing scaling, inhibiting corrosion, and controlling the conductivity of the coolant.

[0075] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A temperature-controlled cooling device, characterized in that, include: The heat exchanger (100) has a first heat exchange channel (110) and a second heat exchange channel (120); The refrigeration flow path includes a main flow path (210) and a bypass branch. The main flow path (210) is provided with a first heat exchange channel (110). The main flow path (210) is provided with a compressor (211), a condenser (212), and a throttling element (213) connected in sequence. The condenser (212) and the throttling element (213) are located between the outlet of the compressor (211) and the inlet of the first heat exchange channel (110). The main flow path (210) can pass refrigerant into the first heat exchange channel (110) to provide cooling capacity to the heat exchanger (100). The two ends of the bypass branch are respectively connected to the inlet and outlet of the first heat exchange channel (110). The bypass branch is provided with a bypass control valve, which is used to control the opening and closing of the bypass branch. The cooling flow path is provided with a second heat exchange channel (120), which can pass coolant into the second heat exchange channel (120) to absorb the cold energy of the heat exchanger (100).

2. The temperature-controlled cooling device according to claim 1, characterized in that: The main flow path (210) is also provided with a first control valve (214), which is located between the condenser (212) and the throttling element (213) to control the opening and closing of the main flow path (210) and the first heat exchange channel (110).

3. The temperature-controlled cooling device according to claim 2, characterized in that: The bypass branch includes a first branch (220), and the bypass control valve includes a second control valve (221). The two ends of the first branch (220) are respectively connected to the inlet of the condenser (212) and the outlet of the first heat exchange channel (110). The second control valve (221) is used to control the opening and closing of the first branch (220).

4. The temperature-controlled cooling device according to claim 3, characterized in that: The bypass branch includes a second branch (230), and the bypass control valve includes a third control valve (231). The two ends of the second branch (230) are respectively connected to the inlet of the first control valve (214) and the outlet of the first heat exchange channel (110). The third control valve (231) is used to control the opening and closing of the second branch (230).

5. The temperature-controlled cooling device according to claim 4, characterized in that: The cooling flow path includes an external circulation flow path (310) and an internal circulation flow path (320). The external circulation flow path (310) is used to provide the coolant to the load end (500). A mixing tank (311) is provided on the external circulation flow path (310). A second heat exchange channel (120) is provided on the internal circulation flow path (320) and communicates with the second heat exchange channel (120). The inlet of the internal circulation flow path (320) is connected to the outlet of the mixing tank (311), and the outlet of the internal circulation flow path (320) is connected to the inlet of the mixing tank (311).

6. The temperature-controlled cooling device according to claim 5, characterized in that: The external circulation path (310) is provided with a first filter (312), an external circulation pump (313) and a flow control valve (314) connected in sequence. The inlet of the first filter (312) is connected to the outlet of the mixing tank (311), and the outlet of the flow control valve (314) is connected to the inlet of the mixing tank (311).

7. The temperature-controlled cooling device according to claim 6, characterized in that: The external circulation path (310) is provided with a first temperature sensor (315) between the external circulation pump (313) and the flow control valve (314); the temperature control cooling device has a first state, in which the detection value of the first temperature sensor (315) is greater than a first preset value, the first control valve (214) is open, and the second control valve (221) and the third control valve (231) are both closed.

8. The temperature-controlled cooling device according to claim 7, characterized in that: The main flow path (210) is also provided with a second temperature sensor (215) for detecting the suction temperature of the compressor (211); the temperature control cooling device has a second state and a third state; the second state is that the detection value of the first temperature sensor (315) is less than or equal to the first preset value, and the detection value of the second temperature sensor (215) is less than the second preset value, the second control valve (221) is open, and the first control valve (214) and the third control valve (231) are both closed; the third state is that the detection value of the first temperature sensor (315) is less than or equal to the first preset value, and the detection value of the second temperature sensor (215) is greater than the third preset value, the third control valve (231) is open, and the first control valve (214) and the second control valve (221) are both closed.

9. The temperature-controlled cooling device according to claim 5, characterized in that: The internal circulation path (320) is provided with a second filter (321), an internal circulation pump (322) and a flow switch (323) connected in sequence. The inlet of the second filter (321) is connected to the outlet of the mixing tank (311), and the outlet of the flow switch (323) is connected to the inlet of the second heat exchange channel (120).

10. The temperature-controlled cooling device according to claim 6, characterized in that: The cooling flow path also includes a branch path, one end of which is connected to the outlet of the external circulation pump (313) and the other end is connected to the inlet of the mixing tank (311). A branch path control valve is provided on the branch path, which is used to control the opening and closing of the branch path.

Images