A temperature control system

Abstract

The application discloses a temperature control system, which comprises a controller configured to sequentially operate a primary side heat exchange circuit, a second heat exchanger, a first heat exchanger and a secondary side heat exchange circuit connected with the controller, so as to absorb heat of a facility to be cooled by a liquid cooling plate provided in the secondary side heat exchange circuit; a heat exchange temperature difference required for cooling of the temperature control system is calculated according to an obtained ambient temperature and a target cooling temperature; when the heat exchange temperature difference is less than a first temperature difference threshold, a heat exchange component provided in the second heat exchanger is controlled to realize heat exchange between natural air and refrigerant; when the heat exchange temperature difference is greater than the first temperature difference threshold and less than a second temperature difference threshold, the heat exchange component is controlled to realize heat exchange between a natural water source and the refrigerant; and when the heat exchange temperature difference is greater than the second temperature difference threshold, the heat exchange component is controlled to realize heat exchange between the natural air and the natural water source and the refrigerant, respectively. Therefore, the temperature control system is not affected by seasons and regions, and is beneficial to popularization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial cooling, and in particular to a temperature control system. BACKGROUND

[0002] With the popularization of artificial intelligence (AI), the energy consumption of data centers and energy storage facilities is increasing, and improving the energy utilization rate of data centers and energy storage facilities has become a hot research direction in the temperature control industry. Among them, the natural cold source has stable temperature and low acquisition cost. Adding a natural cold source utilization device in a data center or an energy storage device can achieve similar refrigeration effect as mechanical refrigeration, greatly improving the energy utilization rate of these facilities.

[0003] At present, the conventional temperature control system mostly uses single mechanical refrigeration to cool the data center or the energy storage device, which consumes a large amount of energy. The energy storage system using natural cold source is mostly a single natural cold source utilization system, and the corresponding technical solution is greatly affected by seasons and regions, which is not conducive to large-scale promotion. SUMMARY

[0004] To solve the above technical problems, embodiments of the present application provide a temperature control system.

[0005] Some embodiments of the present application provide a temperature control system, characterized in that it comprises: a primary side heat exchange circuit for heat exchange based on refrigerant flowing in the circuit; a secondary side heat exchange circuit for heat exchange based on deionized water flowing in the circuit, comprising a liquid cooling plate for absorbing heat of a facility to be cooled; a first heat exchanger connected with a first heat exchange end of the primary side heat exchange circuit and a second heat exchange end of the secondary side heat exchange circuit respectively, for heat exchange between the refrigerant and the deionized water; a second heat exchanger connected with a third heat exchange end of the primary side heat exchange circuit, comprising a heat exchange component for realizing heat exchange between the refrigerant and natural air and natural water source respectively; a controller connected with the primary side heat exchange circuit, the secondary side heat exchange circuit, the first heat exchanger and the second heat exchanger respectively, configured to perform the following steps: sequentially operating the primary side heat exchange circuit, the second heat exchanger, the first heat exchanger and the secondary side heat exchange circuit to absorb heat of the facility to be cooled based on the liquid cooling plate; calculating a heat exchange temperature difference required for cooling of the temperature control system according to an obtained ambient temperature and a target cooling temperature; when the heat exchange temperature difference is less than a first temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural air and the refrigerant; when the heat exchange temperature difference is greater than the first temperature difference threshold and less than a second temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural water source and the refrigerant; and when the heat exchange temperature difference is greater than the second temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural air and the natural water source and the refrigerant respectively.

[0006] In the above embodiments, three different heat exchange modes are provided based on different combinations of the two natural cold sources of natural air and natural water source, and the heat exchange temperature difference is calculated according to the obtained ambient temperature and target cooling temperature, so that the heat exchange mode is selected based on the heat exchange temperature difference, thereby making the temperature control system of the present application not affected by seasons and regions, and facilitating popularization.

[0007] In some embodiments of the present application, the heat exchange assembly comprises: a fan, an air outlet of the fan facing the third heat exchange end, for supplying natural air; a spray water pump, a water outlet of the spray water pump facing the third heat exchange end; a water tank for filling natural water source, the water tank being connected with the spray water pump; and the controller is further configured to perform the following steps: obtaining the water inlet temperature of the primary side heat exchange circuit; if the water inlet temperature is greater than a preset residual heat value, adjusting the rotating speed of the fan to a preset first rotating speed when the fan is enabled, and adjusting the flow of the spray water pump to a preset first flow when the spray water pump is enabled.

[0008] In the above embodiments, the heat exchange effect of the primary side heat exchange circuit is judged by the residual heat value of the water inlet temperature of the primary side heat exchange circuit, and the rotating speed of the fan and the flow of the spray water pump are adjusted based on the judgment result, thereby improving the use flexibility of the temperature control system.

[0009] In some embodiments of the present application, the primary side heat exchange circuit further comprises: a liquid storage tank for storing the refrigerant; a liquid pump, a water inlet of the liquid pump being connected with the liquid storage tank, for pumping the refrigerant into the primary side heat exchange circuit; a first electric regulating valve for controlling the water inlet flow of the primary side heat exchange circuit; and the controller is further configured to perform the following steps: if the temperature control system runs for greater than a preset first time length, and the water inlet temperature is still greater than a preset residual heat value, controlling the fan and the spray water pump to be turned on, and adjusting the first electric regulating valve to a preset first opening degree.

[0010] In the above embodiments, the heat exchange effect of the primary side heat exchange circuit is judged by the duration that the water inlet temperature of the primary side heat exchange circuit is greater than a preset residual heat value, and the fan and the spray water pump are controlled to be turned on and the opening degree of the first electric regulating valve is controlled based on the judgment result, thereby improving the use flexibility of the temperature control system.

[0011] In some embodiments of the present application, the primary side heat exchange circuit further comprises: a magnetic suspension air pump for controlling the water outlet flow of the primary side heat exchange circuit; and the controller is further configured to perform the following steps: if the temperature control system runs for greater than a preset first time length, and the water inlet temperature is still greater than a preset residual heat value, controlling the air suction superheat degree of the magnetic suspension air pump to be a preset first temperature value.

[0012] In the above embodiment, the heat exchange effect of the primary side heat exchange circuit is judged by the duration that the inlet water temperature of the primary side heat exchange circuit is greater than the preset residual heat value, and the opening of the fan and the spray water pump and the temperature value of the air suction superheat degree of the magnetic suspension air pump are controlled based on the judgment result, thereby improving the use flexibility of the temperature control system.

[0013] In some embodiments of the present application, the primary side heat exchange circuit further comprises: a first stop valve arranged in parallel with the first electric regulating valve; and a second stop valve arranged in parallel with the magnetic suspension air pump; and the controller is further configured to perform the following steps: when the first electric regulating valve is opened, the first stop valve is controlled to be opened, and / or when the magnetic suspension air pump is opened, the second stop valve is controlled to be opened.

[0014] In some embodiments of the present application, further comprising: a cold source direct utilization circuit for directly charging natural water source into the water tank to use the natural water source for heat exchange of the second heat exchanger; a first filter for filtering the natural water source to obtain spray water charged into the water tank; and a cold source indirect utilization circuit for heat exchange between the spray water in the water tank and the natural water source to use the spray water after heat exchange of the natural water source for heat exchange of the second heat exchanger; the cold source direct utilization circuit and the cold source indirect utilization circuit are respectively connected with the controller; and the controller is further configured to perform the following steps: detecting the water quality of the natural water source obtained from the environment to obtain a water quality parameter of the natural water source in the environment; judging whether the water quality parameter meets the management standard of the local water quality environment; if yes, the cold source direct utilization circuit is enabled, otherwise, the cold source indirect utilization circuit is enabled.

[0015] In the above embodiment, the cold source utilization circuit suitable for different water quality environments can be selected, thereby improving the adaptability of the temperature control system in different water quality environments.

[0016] In some embodiments of the present application, the cold source indirect utilization circuit comprises: a first circulation circuit for circulating the spray water in the water tank; a second circulation circuit for circulating the natural water source; and a third heat exchanger arranged between the first circulation circuit and the second circulation circuit for isolating the spray water and the natural water source while realizing heat exchange between the spray water in the first circulation circuit and the natural water source in the second circulation circuit; and the controller is further configured to perform the following steps: when the cold source indirect utilization circuit is enabled, the third heat exchanger is operated to realize heat exchange between the spray water in the first circulation circuit and the natural water source in the second circulation circuit.

[0017] In the above embodiment, since the third heat exchanger can isolate the spray water in the temperature control system from the natural water source, the third heat exchanger can reduce the pollution and damage of the spray water circulation to the natural water source while realizing heat exchange.

[0018] In some embodiments of the present application, the second filter is further configured to filter the natural water sprayed by the spray water pump, and the controller is further configured to: when the cold source direct utilization circuit is enabled, introduce the natural water sprayed by the spray water pump into the second filter for circulation filtering until the filtered natural water meets the management standard of the local water quality environment and is discharged.

[0019] In the above embodiment, when the cold source direct utilization circuit is enabled in the temperature control system, the natural water sprayed by the spray water pump is filtered by the second filter for circulation filtering until the filtered natural water meets the management standard of the local water quality environment and is discharged, which can reduce the pollution and damage of the spray water circulation to the natural water source.

[0020] In some embodiments of the present application, the waste heat recovery device is further configured to absorb heat in the primary side heat exchange circuit and is connected to the controller, and the controller is further configured to: control the waste heat recovery device to absorb heat in the primary side heat exchange circuit during operation of the temperature control system.

[0021] In the above embodiment, the waste heat recovery device can collect and reuse the waste heat generated by heat exchange, thereby reducing energy waste.

[0022] In some embodiments of the present application, the outlet end of the secondary side heat exchange circuit further comprises a first water pump and a second water pump connected in parallel, and the controller is further configured to: acquire the circuit temperature of the outlet end of the secondary side heat exchange circuit, and determine whether the circuit temperature is greater than a preset second temperature; if yes, start the first water pump and the second water pump, and if not, start the first water pump or the second water pump.

[0023] In the above embodiment, the circuit temperature of the outlet end of the secondary side heat exchange circuit is used to determine the heat exchange effect of the secondary side heat exchange circuit, and the control mode of the first water pump and the second water pump is determined according to the determination result, thereby improving the use flexibility of the temperature control system.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1Fig. 1 is a schematic diagram of the overall structure of a temperature control system according to an exemplary embodiment of the present application.

[0026] Figure 2 Fig. 2 is a schematic diagram of the overall structure of a second heat exchanger according to an exemplary embodiment of the present application.

[0027] Figure 3 Fig. 3 is a schematic diagram of the overall structure of a primary side heat exchange circuit according to an exemplary embodiment of the present application.

[0028] Figure 4 Fig. 4 is a schematic diagram of the overall structure of a cold source utilization circuit according to an exemplary embodiment of the present application.

[0029] Figure 5 Fig. 5 is a schematic diagram of the overall structure of a secondary side heat exchange circuit according to an exemplary embodiment of the present application.

[0030] Figure 6 Fig. 6 is a flowchart of the execution steps of a control program in a controller according to an exemplary embodiment of the present application.

[0031] Figure 7 Fig. 7 is a flowchart of the execution steps of a control program in a controller according to another exemplary embodiment of the present application.

[0032] Figure 8 Fig. 8 is a flowchart of the execution steps of a control program in a controller according to yet another exemplary embodiment of the present application.

[0033] BRIEF DESCRIPTION OF THE DRAWINGS 1, first heat exchanger; 2, second heat exchanger; 3, liquid storage tank; 4, liquid pump; 5, first electrically operated regulating valve; 6, magnetic levitation gas pump; 7, solenoid valve; 8, first stop valve; 9, second stop valve; 10, third stop valve; 11, electronic expansion valve; 12, fourth stop valve; 13, fifth stop valve; 14, sixth stop valve; 15, seventh stop valve; 16, eighth stop valve; 17, ninth stop valve; 18, third heat exchanger; 19, second filter; 20, second electrically operated regulating valve; 21, first water pump; 22, second water pump; 23, first check valve; 24, second check valve; 25, third filter; 26, third electrically operated regulating valve. DETAILED DESCRIPTION

[0034] In order to make the purpose and implementation of the present application more clear, the exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the exemplary embodiments described are only a part of the embodiments of the present application, and not all of the embodiments of the present application.

[0035] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0036] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0037] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0038] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0039] Figure 1 This is a schematic diagram of the overall structure of a temperature control system shown in an exemplary embodiment of this application. Figure 1 As shown, the temperature control system includes a primary side heat exchange circuit and a secondary side heat exchange circuit.

[0040] The primary heat exchange circuit is filled with a refrigerant, which circulates within the primary heat exchange circuit to perform heat exchange based on the refrigerant flowing in the circuit.

[0041] Deionized water is poured into the secondary side heat exchange loop, and the deionized water circulates in the secondary side heat exchange loop to perform heat exchange based on the deionized water flowing in the loop.

[0042] It should be noted that refrigerant can be produced by refrigeration equipment, such as a compression condensing device, an evaporative condensing device, etc. Deionized water refers to pure water from which ionic impurities have been removed. Deionized water can be obtained by using ion exchange resins, reverse osmosis-ion exchange, or reverse osmosis-electrodeionization (EDI).

[0043] The secondary side heat exchange circuit is further provided with a liquid cooling plate, which is used to absorb heat of the facility to be cooled. The liquid cooling plate can be arranged at an end of the secondary side heat exchange circuit away from the primary side heat exchange circuit, or can be arranged at other positions of the secondary side heat exchange circuit. The liquid cooling plate of the application can be one or more. When there are multiple liquid cooling plates, the multiple liquid cooling plates can be arranged in parallel in the secondary side heat exchange circuit.

[0044] The facility to be cooled can be one of a data center and an energy storage facility, or other heat generating facilities requiring industrial cooling. The liquid cooling plate is a device that achieves refrigeration effect on an object through a specific principle. For example, through the use of thermoelectric effect, compression-condensation cycle, evaporation cooling cycle or heat conduction, electric energy or other forms of energy are converted into cold heat energy, and heat is dissipated through heat conduction, so as to achieve the purpose of cooling.

[0045] A first heat exchanger 1 is arranged between the primary side heat exchange circuit and the secondary side heat exchange circuit.

[0046] The first heat exchanger 1 in the embodiment can be a plate heat exchanger. It can also be other heat exchangers, for example, the plate heat exchanger can be replaced by a shell-and-tube heat exchanger or a double-pipe heat exchanger according to actual engineering. This is only for illustration and not for limitation.

[0047] An end of the primary side heat exchange circuit close to the secondary side heat exchange circuit is a first heat exchange end, and an end of the secondary side heat exchange circuit close to the primary side heat exchange circuit is a second heat exchange end.

[0048] The first heat exchanger 1 is connected with the first heat exchange end of the primary side heat exchange circuit and the second heat exchange end of the secondary side heat exchange circuit respectively, and is used to realize heat exchange between the refrigerant and the deionized water.

[0049] In specific use, the deionized water of the secondary side heat exchange circuit absorbs heat of the data center or the energy storage facility, for example, heat of a CPU or a battery cell, through the liquid cooling plate, and then transfers the heat to the refrigerant in the primary side heat exchange circuit in the first heat exchanger 1, and the refrigerant in the primary side heat exchange circuit absorbs heat and evaporates in the first heat exchanger 1.

[0050] The primary side heat exchange circuit is further provided with a third heat exchange end, which can be arranged at an end of the primary side heat exchange circuit away from the secondary side heat exchange circuit, or can be arranged at other positions of the primary side heat exchange circuit.

[0051] A second heat exchanger 2 is arranged at the third heat exchange end of the primary side heat exchange circuit. The second heat exchanger 2 includes a heat exchange assembly for realizing heat exchange between the refrigerant and natural air and a natural water source respectively.

[0052] The temperature control system further includes a controller connected with the primary side heat exchange circuit, the secondary side heat exchange circuit, the first heat exchanger 1 and the second heat exchanger 2 respectively.

[0053] For example, in order to execute the preset control program on the controller, the internal of the controller is provided with a storage module for storing the control program, which can include an internal memory and an external memory. The internal memory is arranged in the controller, and the external memory is electrically connected with the controller. The external memory and the internal memory are used for writing and reading of the control program and storage of execution parameters. For example, the internal memory is generally directly connected with the CPU (Central Processing Unit) corresponding to the controller, and the storage capacity thereof is generally small, but the speed thereof is relatively fast due to the direct connection with the CPU. In the present application, the internal memory is used to store the instructions and data of the current running program and directly exchanges information with the CPU. The internal memory is composed of a plurality of storage units, each of which can store a binary number or an instruction represented by binary code. The internal memory is composed of random access memory and read-only memory. The external memory refers to the memory other than the memory configured by the controller and the CPU cache. Such memory can generally save data after power off, for example, a hard disk, a floppy disk, an optical disk, a U disk, etc.

[0054] Figure 2 The overall structure of the second heat exchanger is shown in the schematic view of the example embodiment of the present application. As shown in the figure, the heat exchange assembly of the second heat exchanger 2 can include a fan, a spray water pump and a water tank. Figure 2

[0055] The outlet of the fan is directed to the third heat exchange end of the primary side heat exchange circuit, for supplying natural air. The natural air supplied by the fan cools the refrigerant in the third heat exchange end, to realize heat exchange between the natural air and the refrigerant.

[0056] The second heat exchanger 2 is provided with a water tank, which is used to fill with natural water source. The water tank is connected with the spray water pump, to provide spray water for the spray water pump. The outlet of the spray water pump is directed to the third heat exchange end.

[0057] In some embodiments of the present application, in order to improve the use effect of the fan, an air inlet grid is arranged at the third heat exchange end of the primary side heat exchange circuit. A plurality of air inlets are arranged on the air inlet grid (not shown in the figure), and the plurality of air inlets are uniformly distributed on the third heat exchange end of the primary side heat exchange circuit, to improve the efficiency of heat exchange between the natural air and the refrigerant.

[0058] In addition, in order to improve the use effect of the spray water pump, a packing zone is further arranged at the third heat exchange end of the primary side heat exchange circuit, so that the packing in the packing zone can increase the heat exchange area of the spray water and the refrigerant, to sufficiently exchange heat with the refrigerant in the primary side heat exchange circuit. Meanwhile, the outlet of the air inlet grid can also be directed to the packing zone.​

[0059] The second heat exchanger 2 is provided with a heat exchange coil, and the heat exchange coil is located in a packing area. The packing in the packing area can be of different types (such as plastic packing, ceramic packing and metal packing) according to engineering requirements. The packing area is used to increase the heat exchange area of the heat exchange coil and improve the heat transfer efficiency.

[0060] The fan of the present application can be a axial fan. Air enters through the air inlet grid, passes through the heat exchange coil and the packing area, and is blown out by the fan.

[0061] The second heat exchanger 2 can be an evaporative heat exchanger.

[0062] Figure 3 The overall structure of the primary side heat exchange circuit is shown in the exemplary embodiment of the present application. As shown in the figure, the primary side heat exchange circuit can also include a liquid storage tank 3. The liquid storage tank 3 can be provided at the water inlet end of the primary side heat exchange circuit for storing refrigerant. Of course, the liquid storage tank 3 can also be provided at other positions of the primary side heat exchange circuit. Figure 3

[0063] The liquid storage tank 3 can be located at the lowest position of the primary side heat exchange circuit. When the system is shut down, the refrigerant in the circulation can flow into the liquid storage tank 3 for storage by gravity. Thus, certain energy consumption can be reduced.

[0064] The primary side heat exchange circuit can also include a liquid pump 4. The water inlet end of the liquid pump 4 is in communication with the refrigerant to pump the refrigerant in the liquid storage tank 3 into the primary side heat exchange circuit.

[0065] The primary side heat exchange circuit can also include a first electrically controlled regulating valve 5 for controlling the water inlet flow of the primary side heat exchange circuit. For example, the first electrically controlled regulating valve 5 can be provided at the water inlet end or the water outlet end of the liquid pump 4.

[0066] In some embodiments of the present application, the primary side heat exchange circuit can also include a magnetic suspension air pump 6, which can be provided at the water outlet end of the primary side heat exchange circuit. Of course, the specific position of the magnetic suspension air pump 6 on the primary side heat exchange circuit is only exemplary and can be adapted according to the actual application scenario.

[0067] It should be noted that the magnetic suspension air pump 6 can make the system oil-free, thereby improving the system reliability and system energy efficiency. At the same time, the magnetic suspension air pump 6 can also be used as a supplemental pump device for the liquid pump 4 in the present embodiment, which can effectively prevent the system from failing to operate due to failure of the liquid pump 4.

[0068] ​The primary side heat exchange circuit can further comprise an electromagnetic valve 7, which is arranged in series with the magnetic suspension air pump 6, and the electromagnetic valve 7 is used to control the water flow of the primary side heat exchange circuit through the control of the controller. During the start-up of the magnetic suspension air pump 6, the controller sends a control signal to the electromagnetic valve 7 to control the liquid flow of the corresponding branch of the magnetic suspension air pump 6.

[0069] In some embodiments of the present application, the primary side heat exchange circuit can further comprise a plurality of stop valves. For example, the primary side heat exchange circuit can further comprise a first stop valve 8, which can be arranged in parallel with the first electric regulating valve 5. The first stop valve 8 can be a complementary valve of the first electric regulating valve 5, which can effectively prevent the system from failing to operate due to the failure of the first electric regulating valve 5 and / or the liquid pump 4.

[0070] The first stop valve 8 can be a manual valve or an automatic valve controlled by the controller.

[0071] For another example, the primary side heat exchange circuit can further comprise a second stop valve 9, which can be arranged in parallel with the magnetic suspension air pump 6. The second stop valve 9 can be a complementary valve of the electromagnetic valve 7, which can effectively prevent the system from failing to operate due to the failure of the electromagnetic valve 7 and / or the magnetic suspension air pump 6.

[0072] Similarly, the second stop valve 9 can be a manual valve or an automatic valve controlled by the controller.

[0073] In a use scenario, if the magnetic suspension air pump 6 fails, the second stop valve 9 can be opened to ensure the normal operation of the primary side heat exchange circuit through the corresponding branch of the second stop valve 9.

[0074] In some embodiments of the present application, the water inlet end of the primary side heat exchange circuit can further comprise a third stop valve 10 and an electronic expansion valve 11 arranged in parallel.

[0075] The third stop valve 10 is an insurance valve of the electronic expansion valve 11. For example, the third stop valve 10 can be a manual valve, and the electronic expansion valve 11 is an automatic valve controlled by the controller. When the electronic expansion valve 11 fails, the third stop valve 10 can be manually adjusted to ensure the normal operation of the system.

[0076] In some embodiments of the present application, the water inlet end and the water outlet end of the primary side heat exchange circuit can be provided with temperature sensors and pressure sensors to obtain the running state of the primary side heat exchange circuit in real time.

[0077] For example, the components marked with P in the figure can be pressure sensors, and the components marked with T in the figure can be temperature sensors.

[0078] In some embodiments of the present application, the outlet end of the primary side heat exchange circuit can be provided with a waste heat recovery device for absorbing heat in the primary side heat exchange circuit, and connected with the controller. It should be noted that the position of the waste heat recovery device can be at any position of the outlet end of the primary side heat exchange circuit, so as to effectively absorb the waste heat of the refrigerant after the heat exchange of the first heat exchanger 1.

[0079] In use, during the operation of the temperature control system, the waste heat recovery device absorbs heat on the primary side heat exchange circuit.

[0080] For example, heat exchanger, heat pump, etc. The heat exchanger exchanges heat through two different temperature fluids to realize the recycling of waste heat; the heat pump absorbs low-grade heat from the environment and converts it into high-grade heat by consuming part of the electric energy.

[0081] For another example, the waste heat recovery device can adopt a plate-type regenerator, a shell-and-tube regenerator or a double-pipe regenerator, which is used to absorb the heat of the high-temperature refrigerant flowing out of the primary side heat exchange circuit, and utilize the heat to prepare domestic hot water in summer and to provide heating in winter. The two sides of the heat exchange fluid are high-temperature refrigerant and domestic water or heating water.

[0082] In some embodiments of the present application, Figure 4 The overall structure schematic diagram of the cold source utilization circuit shown in the exemplary embodiments of the present application is shown in FIG. 1. As shown in FIG. 1, the temperature control system disclosed in the present application can further include a cold source direct utilization circuit. The cold source direct utilization circuit is used to directly fill the natural water source into the water tank to use the natural water source for heat exchange of the second heat exchanger 2. Figure 4

[0083] Among them, the cold source direct utilization circuit includes an inlet pipe and an outlet pipe, one end of the inlet pipe is introduced into the natural water source, and the other end is connected with the water tank. The fourth stop valve 12 is arranged on the inlet pipe, and the fourth stop valve 12 is used for on-off control of the inlet pipe. The outlet pipe is used to guide the natural water source sprayed by the spray water pump to the natural environment, and the fifth stop valve 13 is arranged on the outlet pipe, and the fifth stop valve 13 is used for on-off control of the outlet pipe.

[0084] The temperature control system can further include a first filter and a cold source indirect utilization circuit. The first filter is used to filter the natural water source to obtain spray water filled into the water tank. The cold source indirect utilization circuit is used for heat exchange between the spray water in the water tank and the natural water source, so as to use the spray water after heat exchange of the natural water source for heat exchange of the second heat exchanger 2.

[0085] ​The cold source indirect utilization circuit can include a first circulating loop for circulating the water in the water tank for spraying. The first circulating loop includes an inlet water pipeline and an outlet water pipeline, and the sixth stop valve 14 is arranged on the inlet water pipeline, and the seventh stop valve 15 is arranged on the outlet water pipeline.

[0086] The cold source indirect utilization circuit can include a second circulating loop for circulating the natural water source. The second circulating loop includes an inlet water pipeline and an outlet water pipeline, and the eighth stop valve 16 is arranged on the inlet water pipeline, and the ninth stop valve 17 is arranged on the outlet water pipeline.

[0087] The cold source indirect utilization circuit can include a third heat exchanger 18 arranged between the first circulating loop and the second circulating loop, for isolating the spraying water from the natural water source, and realizing heat exchange between the spraying water in the first circulating loop and the natural water source in the second circulating loop. The third heat exchanger 18 can be a water-water heat exchanger, a plate heat exchanger, or other heat exchangers.

[0088] In some embodiments of the present application, a second filter 19 and a second electric regulating valve 20 can also be arranged on the outlet water pipeline of the direct utilization circuit. The second filter 19 is used to filter the natural water source after being sprayed by the spraying water pump.

[0089] The second electric regulating valve 20 is arranged in series with the second filter 19, and the second electric regulating valve 20 is arranged at the water inlet end of the second filter 19. The second electric regulating valve 20 is used to control the water inflow on the outlet water pipeline of the direct utilization circuit, so as to improve the filtering effect of the second filter 19.

[0090] Since the first filter and the second filter 19 are both arranged in the primary side heat exchange circuit, when the first filter and the second filter 19 are used, they can be used alternately, or only one of them is used, and the other one is used as a backup.

[0091] It should be noted that the water source indirect utilization mode uses a water-water heat exchanger to isolate the spraying system circulating water and the natural water source, and the advantage is to avoid the pollution and damage of the spraying water system circulation to the natural water source, so as to meet the legal regulations of environmental protection in the region or country where the temperature control system is used. In addition, if the water quality of the natural water source is poor (such as high sand content or non-neutral water quality), it is easy to cause blockage or corrosion of the spraying system, so the natural water source indirect utilization mode can be used. The spraying circulating system of the water source direct utilization mode is an open system, which is directly connected with the natural water source and directly uses the natural water source as the spraying water. The advantage of this utilization mode is that the utilization rate of the natural water source is relatively high, and the energy efficiency of the whole temperature control system is better. If this water source utilization mode is used, the natural water source should be relatively stable and the water quality should meet the spraying water quality requirements of the spraying facilities.

[0092] In some embodiments of the present application,Figure 5 A schematic diagram of the overall structure of the secondary side heat exchange circuit is shown in the exemplary embodiments of the present application. As shown in the figure, the water outlet end of the secondary side heat exchange circuit can also include a first water pump 21 and a second water pump 22 arranged in parallel. Figure 5

[0093] In use, the flow rate of the deionized water in the secondary side heat exchange circuit can be adjusted by the first water pump 21 and the second water pump 22, thereby improving the heat exchange efficiency.

[0094] In some embodiments of the present application, a first one-way valve 23 can be arranged at the water outlet end of the first water pump 21. A second one-way valve 24 can be arranged at the water outlet end of the second water pump 22. Thereby, the probability of backflow of the deionized water is reduced, and the cooling effect of the liquid cooling plate is improved.

[0095] In some embodiments of the present application, temperature sensors, pressure sensors and flow meters can be arranged at the water inlet end and the water outlet end of the secondary side heat exchange circuit to obtain the operating state of the secondary side heat exchange circuit in real time. For example, in the corresponding diagram of the secondary side heat exchange circuit, the component marked with P can be a pressure sensor, the component marked with T can be a temperature sensor, and the component marked with G can be a flow meter.

[0096] In some embodiments of the present application, a third filter 25 can be arranged at the water inlet end of the secondary side heat exchange circuit to filter the deionized water entering the secondary side heat exchange circuit.

[0097] In addition, a third electrically adjustable valve 26 can also be arranged at the water inlet end of the secondary side heat exchange circuit, which is used to control the water inflow of the secondary side heat exchange circuit.

[0098] Figure 6 A flow chart of the execution steps of the control program in the controller is shown in the exemplary embodiments of the present application. As shown in the figure, the controller of the present application is at least configured to perform the following steps: Figure 6

[0099] The primary side heat exchange circuit, the second heat exchanger, the first heat exchanger and the secondary side heat exchange circuit are sequentially operated to absorb the heat of the liquid cooling plate based on the facility to be cooled;

[0100] According to the obtained ambient temperature and target cooling temperature, the heat exchange temperature difference required by the temperature control system for cooling is calculated;

[0101] When the heat exchange temperature difference is less than the first temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between the natural air and the refrigerant; when the heat exchange temperature difference is greater than the first temperature difference threshold and less than the second temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between the natural water source and the refrigerant; when the heat exchange temperature difference is greater than the second temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between the natural air and the natural water source and the refrigerant, respectively.​​

[0102] Specifically, the temperature control system of the present application mainly adopts three different operation modes: air natural cold source utilization mode, water natural cold source utilization mode and mixed natural cold source utilization mode. The control steps of the above-mentioned controller are described as follows:

[0103] The content of the air natural cold source utilization mode is that when the heat exchange temperature difference is less than the first temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between natural air and refrigerant. When the outdoor temperature is lower than a certain temperature or there is no available natural water source cold source around, the water pump, magnetic suspension air pump and electromagnetic valve of the spray system of the evaporative heat exchanger are closed, and the fan and liquid pump of the evaporative heat exchanger are opened. The low-temperature air outside the room enters the evaporative heat exchanger to cool the refrigerant, and the refrigerant changes from gas to liquid. The refrigerant is driven into the plate heat exchanger by the liquid pump to complete heat exchange. In the secondary side, the low-temperature refrigerant flowing out of the plate heat exchanger exchanges heat with the heating elements or the battery through the liquid cooling liquid cooling plate, and then enters the plate heat exchanger again to complete a complete heat exchange cycle. This mode fully utilizes outdoor air for cooling.

[0104] The content of the water natural cold source utilization mode is that when the heat exchange temperature difference is greater than the first temperature difference threshold and less than the second temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between natural water source and refrigerant. When the outdoor environment temperature is high, air is not suitable as a natural cold source, the fan of the evaporative heat exchanger is closed, and the water pump, magnetic suspension air pump, electromagnetic valve and liquid pump of the spray system of the evaporative heat exchanger are opened. Renewable water natural cold source (underground water source, river or sea, etc.) cools the spray water in the water tank through the water-water heat exchanger or directly participates in heat exchange in the evaporative heat exchanger as spray water. In addition, in the evaporative heat exchanger, the spray water system sprays water to the heat exchange coil, and the spray water forms a liquid film on the surface of the heat exchange coil and exchanges energy with the refrigerant in the heat exchange coil.

[0105] The content of the mixed natural cold source utilization mode is that when the heat exchange temperature difference is greater than the second temperature difference threshold, the heat exchange assembly is controlled to realize heat exchange between natural air and natural water source and refrigerant respectively. When the outdoor temperature is in a certain temperature range, the air or water source single natural cold source is insufficient, the fan of the evaporative heat exchanger and the water pump of the spray system can be opened at the same time. The refrigerant is cooled by cold air and spray water, and the gaseous refrigerant is gradually condensed into liquid refrigerant. The water sprayed by the water pump is covered on the surface of the heat exchange coil by the strong wind of the air inlet grid, and the spray water greatly improves the heat exchange effect with the help of wind power. This mode fully utilizes outdoor air and cooling water for cooling.

[0106] It should be noted that the selection condition of different modes is essentially the heat exchange temperature difference between the outdoor temperature and the target cooling temperature inside the temperature control system. If it is simply executed by relying on the outdoor temperature, there may be certain errors. For example, in a low temperature environment, the temperature inside the temperature control system is also affected by the environment temperature and is reduced. Therefore, the outdoor temperature cannot be directly used as the basis for selecting different modes.

[0107] Through the above embodiments, three different heat exchange modes are set based on different combinations of natural air and natural water sources as two natural cold sources, and the heat exchange temperature difference is calculated according to the obtained environment temperature and target cooling temperature, so as to select different heat exchange modes based on the heat exchange temperature difference, thereby making the temperature control system of the present application not affected by seasons and regions, and facilitating promotion.

[0108] In some embodiments of the present application, the controller is further configured to perform the following steps:

[0109] The inlet water temperature of the primary side heat exchange circuit is obtained;

[0110] If the inlet water temperature is greater than the preset residual heat value, the speed of the fan is adjusted to a preset first speed when the fan is enabled, and the flow of the spray water pump is adjusted to a preset first flow when the spray water pump is enabled.

[0111] For example, by obtaining the inlet water temperature of the primary side heat exchange circuit, the heat exchange effect of the primary side heat exchange circuit is judged. If the temperature is greater than the preset residual heat value, for example, the inlet water temperature is less than 20 degrees, which indicates that the target heat exchange effect is met, otherwise, it indicates that the target heat exchange effect is not met.

[0112] In the above case, the current enabled cooling mode can be adjusted by the controller. Specifically as follows:

[0113] In the air natural cold source utilization mode, that is, only the fan is turned on, the speed of the fan is adjusted. For example, the default speed of the fan is 500 rps. At this time, the speed of the fan can be adjusted to 800 rps under the condition of ensuring the safe operation of the fan, such as not exceeding the maximum limit voltage. The 800 rps here can be the preset first speed. Of course, the first speed can also be set to other values, as long as the set value of the first speed is greater than the default fan speed setting under the premise of ensuring safety, so as to improve the heat exchange efficiency. It should be noted that the default speed of the fan can be set based on the predicted optimal operation curve of the fan to ensure the safety and service life of the fan. The example data is only illustrative and not limiting.

[0114] In the water natural cold source utilization mode, that is, only the spray water pump is opened, the flow of the spray water pump is adjusted. Based on the above-mentioned air natural cold source utilization mode, similar examples are given. For example, the default flow of the spray water pump is 5 m 3 / h. At this time, the flow of the spray water pump can be adjusted to 8 m 3 / h under the condition of ensuring the safe operation of the spray water pump, such as not exceeding the maximum limit voltage. The 8 m 3 / h here can be the preset first flow. The first flow can also be set to other values as long as the set value of the first flow is greater than the default spray water pump flow under the premise of ensuring safety, so as to improve the heat exchange efficiency. It should also be pointed out that the default flow of the spray water pump can be set based on the predicted optimal operation curve of the spray water pump to ensure the safety and service life of the spray water pump. The data of the examples is only illustrative and not limiting.

[0115] Based on the above-mentioned two operation modes, in the mixed natural cold source utilization mode, that is, the fan and the spray water pump are opened at the same time, the fan and the spray water pump can be adjusted at the same time according to the fan adjustment mode corresponding to the air natural cold source utilization mode and the spray water pump adjustment mode corresponding to the water natural cold source utilization mode. Details are not repeated here.

[0116] Through the above-mentioned embodiments, the heat exchange effect of the primary side heat exchange circuit is judged by the residual heat value of the primary side heat exchange circuit inlet water temperature. The speed of the fan and the flow of the spray water pump are adjusted based on the judgment result, so as to improve the use flexibility of the temperature control system.

[0117] In some embodiments of the present application, Figure 7 The flow chart of the execution steps of the control program in the controller shown in another exemplary embodiment of the present application is shown. As Figure 7 shown, the controller of the present application is also configured to perform the following steps:

[0118] If the temperature control system runs for more than a preset first time length, and the inlet water temperature is still greater than a preset residual heat value, the fan and the spray water pump are controlled to be opened, and the first electric regulating valve is adjusted to a preset first opening degree.

[0119] Specifically, in addition to the above-mentioned three main operation modes, the present application also sets a relatively independent operation mode, which can be referred to as a mechanical refrigeration mode hereinafter.

[0120] The content of the mechanical refrigeration mode is represented as: when the cooling capacity of any mode of the air natural cold source utilization mode, the water natural cold source utilization mode and the mixed natural cold source utilization mode is insufficient to meet the demand of the temperature control system, or the natural cold source utilization system fails, the mechanical refrigeration can be used as a way to supplement the cooling capacity to further improve the stability of the temperature control system. It can be understood that the mechanical refrigeration mode is to fully open all cooling paths of the primary side heat exchange circuit.

[0121] For example, in the air natural cold source utilization mode, if the temperature control system runs for more than a preset first time length, and the inlet water temperature is still greater than a preset residual heat value, the control sends an opening signal of the fan and the spray water pump to control the fan and the spray water pump to be in an opening state, and adjusts the first electric regulating valve to a first opening degree.

[0122] It should be noted that the setting principle of the first opening degree is similar to the first rotating speed and the first flow rate, that is, the first opening degree is greater than the default opening degree of the first electric regulating valve, and the opening degree of the first electric regulating valve is increased to improve the heat exchange efficiency at the default opening degree of the first electric regulating valve.

[0123] Through the above implementation mode, the heat exchange effect of the primary side heat exchange circuit is judged by the duration that the inlet water temperature of the primary side heat exchange circuit is greater than the preset residual heat value, and the opening of the fan and the spray water pump and the opening degree of the first electric regulating valve are controlled based on the judgment result, thereby improving the use flexibility of the temperature control system.

[0124] In some embodiments of the present application, the controller of the present application is further configured to perform the following steps:

[0125] If the running time of the temperature control system is greater than a preset first time length, and the inlet water temperature is still greater than a preset residual heat value, the control is performed to make the suction superheat degree of the magnetic suspension air pump a preset first temperature value.

[0126] Similar to the adjustment of the first electric regulating valve, the magnetic suspension air pump is controlled as a supplementary structure of the liquid pump, and when the temperature control system cannot meet the cooling demand of the system based on the three main cooling paths, the flow rate of the primary side heat exchange circuit is increased by adjusting the suction superheat degree of the magnetic suspension air pump.

[0127] For example, when the suction superheat degree of the magnetic suspension air pump is 30 degrees, the flow rate of the corresponding branch is 5 m 3 / h; then when the suction superheat degree of the magnetic suspension air pump is 20 degrees, the flow rate of the corresponding branch is 8 m 3 / h. That is, the smaller the suction superheat degree of the magnetic suspension air pump, the greater the required flow rate of the corresponding branch. Of course, this is only an example for illustration and is not limited.

[0128] Based on this, the adjustment of the first temperature value is similar to the adjustment of the first opening degree, the first rotating speed and the first flow rate, and is also based on the default value, but the first temperature value needs to be less than the default suction gas superheat of the magnetic suspension air pump, and the heat exchange effect of the primary side heat exchange circuit after adjustment is better. Details are not repeated here.

[0129] Through the above-mentioned embodiments, the heat exchange effect of the primary side heat exchange circuit is judged by the duration that the primary side heat exchange circuit inlet water temperature is greater than the preset residual heat value, and the opening of the fan and the spray water pump is controlled based on the judgment result, and the temperature value of the magnetic suspension air pump suction gas superheat is controlled, so as to improve the use flexibility of the temperature control system.

[0130] In some embodiments of the present application, in order to improve the heat exchange effect of the primary side heat exchange circuit, the controller of the present application is further configured to perform the following steps:

[0131] When the first electric regulating valve is opened, the first stop valve is controlled to be opened, and / or when the magnetic suspension air pump is opened, the second stop valve is controlled to be opened.

[0132] Through the above-mentioned embodiments, the normal operation of the primary side heat exchange circuit can be ensured according to the branch where the first stop valve and the second stop valve are located, so as to reduce the resistance effect of the magnetic suspension air pump and the liquid pump itself on the flow of refrigerant. At the same time, the normal operation of the system is also ensured when any structure of the magnetic suspension air pump and the liquid pump fails.

[0133] In some embodiments of the present application, Figure 8 The execution step flow chart of the control program in the controller shown in another exemplary embodiment of the present application is shown in FIG. 6. As shown in FIG. 6, the controller of the present application is further configured to perform the following steps: Figure 8

[0134] The natural water source in the environment is detected to obtain the water quality parameter of the natural water source in the environment;

[0135] It is judged whether the water quality parameter meets the management standard of the local water quality environment;

[0136] If yes, the cold source direct utilization circuit is enabled, otherwise, the cold source indirect utilization circuit is enabled.

[0137] Through the above-mentioned embodiments, the adaptive cold source utilization circuit can be selected based on different water quality environments, so as to improve the adaptability of the temperature control system in different water quality environments.

[0138] In some embodiments of the present application, the controller of the present application is further configured to perform the following steps:

[0139] ​When the cold source indirect utilization circuit is enabled, the third heat exchanger is operated to realize heat exchange between the spray water in the first circulation circuit and the natural water source in the second circulation circuit.

[0140] It should be noted that, based on the arrangement of the third heat exchanger, the spray water in the first circulation circuit can be isolated from the natural water source in the second circulation circuit, which can effectively reduce the probability of cross contamination of the water sources.

[0141] Through the above-mentioned embodiments, since the third heat exchanger can isolate the spray water in the temperature control system from the natural water source, the third heat exchanger can reduce the pollution and damage of the spray water circulation to the natural water source while realizing heat exchange.

[0142] In some embodiments of the present application, the controller of the present application is further configured to perform the following steps:

[0143] When the cold source direct utilization circuit is enabled, the natural water source sprayed by the spray water pump is introduced into the second filter for circulation filtration, and is discharged after the filtered natural water source meets the management standard of the local water quality environment.

[0144] Through the above-mentioned embodiments, when the cold source direct utilization circuit is enabled in the temperature control system, the natural water source sprayed by the spray water pump is circulated and filtered by the second filter, and is discharged after the filtered natural water source meets the management standard of the local water quality environment, which can reduce the pollution and damage of the spray water circulation to the natural water source.

[0145] In some embodiments of the present application, the controller of the present application is further configured to perform the following steps:

[0146] The circuit temperature of the outlet of the secondary side heat exchange circuit is obtained, and it is determined whether the circuit temperature is greater than a preset second temperature;

[0147] If yes, the first water pump and the second water pump are started, otherwise, the first water pump or the second water pump is started.

[0148] Specifically, the present application can determine the starting of the first water pump and the second water pump based on the determination of the circuit temperature of the outlet of the secondary side heat exchange circuit. For example, when the circuit temperature is less than or equal to the preset second temperature, it indicates that the current secondary side heat exchange circuit flow can meet the current heat exchange work, so that the two water pumps do not need to be started, which plays a role in energy saving. Otherwise, the two water pumps need to be started to improve the heat exchange efficiency.

[0149] Through the above-mentioned embodiments, the control mode of the first water pump and the second water pump in the secondary side heat exchange circuit of the present application can improve the use flexibility of the temperature control system.

[0150] It should be noted that, since the temperature fluctuation range requirement of the battery cell of the data center or energy storage facility is high, the temperature control system needs to strictly control the outlet water temperature, and the system can control the temperature of each heat generating element or battery cell within a reasonable range by adjusting the inlet temperature of the primary side heat exchange circuit, the circulating water pump flow of the secondary side heat exchange circuit and the opening degree of the electric regulating valve of each branch.

[0151] When the system is running, the temperature control logic of each branch can adopt a PID control algorithm or a model prediction algorithm based on MPC.

[0152] By way of example, the two control algorithms can be used in different use scenarios. The PID control algorithm is simple to calculate and easy to implement, and is suitable for temperature control systems with fewer branches and smaller temperature fluctuation range of heat generating elements or battery cells. The MPC algorithm has a larger calculation amount and requires accurate mathematical modeling of the temperature of heat generating elements and battery cells, but it is more accurate and has strong control. The implementer can select different control algorithms according to the engineering practice and apply them to the temperature control system described in the patent.

[0153] For the above-mentioned various embodiments of the present application, it should be noted that the flowcharts and block diagrams in the drawings illustrate the possible implementation architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. Each block in the flowchart or block diagram represents a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks can occur in different order from that indicated in the drawings. For example, two blocks indicated in succession can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0154] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0155] For the sake of explanation, the foregoing descriptions have been presented in terms of specific embodiments. However, it is to be appreciated that specific embodiments described herein are not intended to limit the scope of the present application, which is defined with reference to the following claims. Various modifications and changes can be made thereto by those skilled in the art which fall within the scope of the present application as defined by the following claims. The embodiments were chosen and described in order to explain the principles of the application and the practical application and to enable others skilled in the art to understand for implementing various embodiments and with various modifications as are suited to the particular use contemplated.

Claims

1. A temperature control system, characterized by, The application relates to a heat exchange system for cooling facilities, comprising: a primary heat exchange circuit for heat exchange based on refrigerant flowing in the circuit; a secondary heat exchange circuit for heat exchange based on deionized water flowing in the circuit, comprising a liquid cooling plate for absorbing heat of facilities to be cooled; a first heat exchanger connected with a first heat exchange end of the primary heat exchange circuit and a second heat exchange end of the secondary heat exchange circuit respectively, for heat exchange between the refrigerant and the deionized water; a second heat exchanger connected with a third heat exchange end of the primary heat exchange circuit, comprising a heat exchange component for heat exchange between the refrigerant and natural air and a natural water source respectively; a controller connected with the primary heat exchange circuit, the secondary heat exchange circuit, the first heat exchanger and the second heat exchanger respectively, configured to perform the following steps: sequentially operating the primary heat exchange circuit, the second heat exchanger, the first heat exchanger and the secondary heat exchange circuit to absorb heat of facilities to be cooled based on the liquid cooling plate; calculating a heat exchange temperature difference required by the temperature control system according to an acquired ambient temperature and a target cooling temperature; when the heat exchange temperature difference is less than a first temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural air and the refrigerant; when the heat exchange temperature difference is greater than the first temperature difference threshold and less than a second temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural water source and the refrigerant; and when the heat exchange temperature difference is greater than the second temperature difference threshold, controlling the heat exchange component to realize heat exchange between the natural air and the natural water source and the refrigerant respectively.

2. The temperature control system of claim 1, wherein, The heat exchange component comprises: a fan with an air outlet facing the third heat exchange end for supplying natural air; a spraying water pump with a water outlet facing the third heat exchange end; a water tank for filling the natural water source, connected with the spraying water pump; The controller is further configured to perform the following steps: acquiring an inlet water temperature of the primary heat exchange circuit; if the inlet water temperature is greater than a preset residual heat value, adjusting a rotating speed of the fan to a preset first rotating speed when the fan is enabled, and adjusting a flow of the spraying water pump to a preset first flow when the spraying water pump is enabled.

3. The temperature control system of claim 2, wherein, The primary heat exchange circuit further comprises: a liquid storage tank for storing the refrigerant; a liquid pump with an inlet connected with the liquid storage tank for pumping the refrigerant into the primary heat exchange circuit; a first electrically-controlled regulating valve for controlling an inlet water flow of the primary heat exchange circuit; The controller is further configured to perform the following steps: if the temperature control system operates for greater than a preset first time length and the inlet water temperature is still greater than the preset residual heat value, controlling the fan and the spraying water pump to be enabled, and adjusting the first electrically-controlled regulating valve to a preset first opening degree.

4. The temperature control system of claim 3, wherein, The primary heat exchange circuit further comprises: a magnetic levitation air pump for promoting flow of the refrigerant in the primary heat exchange circuit; The controller is further configured to perform the following steps: If the running time of the temperature control system is greater than the preset first time length, and the inlet water temperature is still greater than the preset residual heat value, the control is performed on the air suction superheat degree of the magnetic suspension air pump to be a preset first temperature value.

5. The temperature control system of claim 4, wherein, The primary side heat exchange circuit further comprises: A first stop valve is provided in parallel with the first electrically-controlled regulating valve; A second stop valve is provided in parallel with the magnetic suspension air pump; The controller is further configured to perform the following steps: When the first electrically-controlled regulating valve is opened, the first stop valve is controlled to be opened, and / or when the magnetic suspension air pump is opened, the second stop valve is controlled to be opened.

6. The temperature control system of claim 2, wherein, Further comprising: A cold source direct utilization circuit is used to directly charge the natural water source into the water tank, so as to use the natural water source for heat exchange of the second heat exchanger; A first filter is used to filter the natural water source to obtain spray water to be charged into the water tank; A cold source indirect utilization circuit is used to perform heat exchange between the spray water in the water tank and the natural water source, so as to use the spray water after heat exchange of the natural water source for heat exchange of the second heat exchanger; The cold source direct utilization circuit and the cold source indirect utilization circuit are respectively connected with the controller; The controller is further configured to perform the following steps: Water quality detection is performed on the natural water source obtained from the environment to obtain a water quality parameter of the natural water source in the environment; It is judged whether the water quality parameter meets the management standard of the local water quality environment; If yes, the cold source direct utilization circuit is enabled, otherwise, the cold source indirect utilization circuit is enabled.

7. The temperature control system of claim 6, wherein, The cold source indirect utilization circuit comprises: A first circulation circuit is used to circulate the spray water obtained from the water tank; A second circulation circuit is used to circulate the natural water source; A third heat exchanger is arranged between the first circulation circuit and the second circulation circuit, and is used to isolate the spray water and the natural water source, and meanwhile, to realize heat exchange between the spray water in the first circulation circuit and the natural water source in the second circulation circuit; The controller is further configured to perform the following steps: When the cold source indirect utilization circuit is enabled, the third heat exchanger is operated to realize heat exchange between the spray water in the first circulation circuit and the natural water source in the second circulation circuit.

8. The temperature control system of claim 7, wherein, Further comprising: A second filter is used to filter the natural water source after spraying of the spray water pump; The controller is further configured to perform the following steps: When the cold source direct utilization circuit is enabled, the natural water source after spraying of the spray water pump is introduced into the second filter for circulation filtering, and the filtered natural water source is discharged after meeting the management standard of the local water quality environment.

9. A temperature control system according to any one of claims 1 to 8, wherein Further comprising: A waste heat recovery device is used to absorb heat in the primary side heat exchange circuit, and is connected with the controller; The controller is further configured to perform the following steps: During the operation of the temperature control system, the waste heat recovery device is controlled to absorb heat on the primary side heat exchange circuit.

10. A temperature control system according to any one of claims 1 to 8, wherein, The water outlet end of the secondary side heat exchange circuit further comprises a first water pump and a second water pump arranged in parallel; The controller is further configured to perform the following steps: Acquire the circuit temperature of the outlet of the secondary side heat exchange circuit, and determine whether the circuit temperature is greater than a preset second temperature; If yes, then start the first water pump and the second water pump, otherwise, start the first water pump or the second water pump.

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