Positive and negative pressure switching circulating temperature control system and control method thereof

Abstract

The invention discloses a positive and negative pressure switching circulating temperature control system and a control method thereof.A liquid outlet unit, a first adjusting valve, a positive pressure generating assembly, a client system and a liquid inlet unit of the positive and negative pressure switching circulating temperature control system are sequentially connected through pipelines to form a loop; the first end of the second regulating valve is connected with a liquid outlet unit pipeline, and the second end is connected with a client system pipeline; the negative pressure generation assembly is connected with the liquid inlet unit through a pipeline; when the first regulating valve and the positive pressure generating assembly are opened and the second regulating valve and the negative pressure generating assembly are closed, the positive pressure and negative pressure switching circulating temperature control system provides positive pressure for the client system; and when the first regulating valve and the positive pressure generating assembly are closed and the second regulating valve and the negative pressure generating assembly are opened, the positive and negative pressure switching circulating temperature control system provides negative pressure for the client system. According to the technical scheme, the requirement of the client system for positive and negative pressure circulation temperature control can be met, and the size of the circulation temperature control system can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control circulation equipment, and in particular to a positive and negative pressure switching circulation temperature control system and a control method thereof. Background Art

[0002] At present, traditional temperature control circulation systems usually adopt a single positive pressure circulation or negative pressure circulation, and positive pressure circulation and negative pressure circulation have obvious advantages and disadvantages. Among them, the advantage of positive pressure circulation is that the positive pressure is relatively high, and the temperature control system can supply circulating liquid with higher pressure and flow rate for heat exchange temperature control. The disadvantage is that problems such as leakage of circulating liquid are likely to occur during the circulation process; the advantage of negative pressure circulation is that the internal of the liquid supply system maintains a negative pressure state and is not prone to leakage. The disadvantage is that the negative pressure of the negative pressure system is relatively small, and it is difficult to increase the vacuum degree of the system, resulting in that the negative pressure system can only provide circulating liquid with lower liquid supply pressure and flow rate for heat exchange temperature control.

[0003] However, in the actual use of the temperature control circulation system, it is often necessary to switch between positive pressure circulation and negative pressure circulation to meet the needs of the client system. At present, for the above needs, the positive pressure circulation system and the negative pressure circulation system are often connected to the client system respectively to meet the needs of the client system for positive pressure circulation and negative pressure circulation, which makes the volume of the temperature circulation system relatively large.

[0004] Therefore, there is an urgent need for a circulation temperature control system that can perform positive and negative pressure switching to meet the needs of the client system in different states and reduce the volume of the circulation temperature control system. Summary of the Invention

[0005] The present invention provides a positive and negative pressure switching circulation temperature control system and a control method thereof to solve the problems existing in the prior art, meet the needs of the client system in different states, and is beneficial to reducing the volume of the circulation temperature control system.

[0006] In a first aspect, the present invention provides a positive and negative pressure switching circulation temperature control system, including: a liquid outlet unit, a liquid inlet unit, a positive pressure generating component, a negative pressure generating component, a first regulating valve, and a second regulating valve;

[0007] The liquid outlet unit, the first regulating valve, the positive pressure generating component, the client system, and the liquid inlet unit are sequentially connected by pipelines to form a loop; a first end of the second regulating valve is connected to the liquid outlet unit by a pipeline, and a second end is connected to the client system by a pipeline; the negative pressure generating component is connected to the liquid inlet unit by a pipeline;

[0008] When the first regulating valve and the positive pressure generating component are opened, and the second regulating valve and the negative pressure generating component are closed, the positive and negative pressure switching circulation temperature control system provides positive pressure for the client system;

[0009] When the first regulating valve and the positive pressure generating assembly are closed, and the second regulating valve and the negative pressure generating assembly are opened, the positive and negative pressure switching cyclic temperature control system provides negative pressure for the client system.

[0010] Optionally, the positive and negative pressure switching cyclic temperature control system further includes a third regulating valve and a fourth regulating valve;

[0011] The liquid inlet unit includes at least a first liquid inlet tank and a second liquid inlet tank;

[0012] The negative pressure generating assembly includes a vacuum pump;

[0013] The air inlet of the vacuum pump is connected to the first liquid inlet tank through the third regulating valve and is connected to the second liquid inlet tank through the fourth regulating valve, and the exhaust port of the vacuum pump is communicated with the atmosphere.

[0014] Optionally, the positive and negative pressure switching cyclic temperature control system further includes: a fifth regulating valve 5 and a sixth regulating valve;

[0015] The first liquid inlet tank is connected to the client system through the fifth regulating valve 5; the second liquid inlet tank is connected to the client system through the sixth regulating valve.

[0016] Optionally, the positive and negative pressure switching cyclic temperature control system further includes: a seventh regulating valve and an eighth regulating valve;

[0017] The first liquid inlet tank is connected to the liquid outlet unit through the seventh regulating valve; the second liquid inlet tank is connected to the liquid outlet unit through the eighth regulating valve.

[0018] Optionally, the positive and negative pressure switching cyclic temperature control system further includes: a ninth regulating valve and a tenth regulating valve;

[0019] The exhaust port of the vacuum pump is connected to the first liquid inlet tank through the ninth regulating valve and is connected to the second liquid inlet tank through the tenth regulating valve.

[0020] Optionally, at least one liquid level sensor is provided in the liquid outlet unit, the first liquid inlet tank, and the second liquid inlet tank.

[0021] Optionally, a first pressure sensor is provided in the first liquid inlet tank, a second pressure sensor is provided in the second liquid inlet tank, and a third pressure sensor is provided in the liquid outlet unit.

[0022] Optionally, a fourth pressure sensor is provided on the pipeline between the positive pressure generating assembly and the client load.

[0023] Optionally, the positive and negative pressure switching cyclic temperature control system further includes a water cooling circuit and a first heat exchanger;

[0024] The water cooling circuit adjusts the temperature of the circulating liquid in the pipeline between the client system and the liquid inlet unit through the first heat exchanger.

[0025] Optionally, an eleventh regulating valve is provided on the pipeline of the water cooling circuit;

[0026] A temperature measuring unit is provided on the pipeline between the liquid outlet unit and the client system.

[0027] In a second aspect, the present invention further provides a control method for a positive and negative pressure switching cyclic temperature control system. The positive and negative pressure switching cyclic temperature control system includes a liquid outlet unit, a liquid inlet unit, a positive pressure generating component, a negative pressure generating component, a first regulating valve and a second regulating valve; the liquid outlet unit, the first regulating valve, the positive pressure generating component, the client system and the liquid inlet unit are sequentially connected by pipelines to form a loop; a first end of the second regulating valve is connected to the liquid outlet unit by a pipeline, and a second end is connected to the client system by a pipeline; the negative pressure generating component is connected to the liquid inlet unit by a pipeline; the control method includes:

[0028] Obtain the target requirements of the client system; the target requirements include positive pressure circulation requirements and negative pressure circulation requirements;

[0029] When the positive pressure circulation requirement is obtained, control the first regulating valve and the positive pressure generating component to open, and at the same time control the second regulating valve and the negative pressure generating component to close;

[0030] When the negative pressure circulation requirement is obtained, control the second regulating valve and the negative pressure generating component to open, and at the same time control the first regulating valve and the positive pressure generating component to close.

[0031] In the technical solution of the present invention, the liquid outlet unit, the first regulating valve, the positive pressure generating assembly, the client system, and the liquid inlet unit in the positive and negative pressure switching circulating temperature control system are sequentially connected by pipelines to form a loop. The first end of the second regulating valve is connected to the liquid outlet unit by a pipeline, the second end is connected to the client system by a pipeline, and the negative pressure generating assembly is connected to the liquid inlet unit by a pipeline. When the first regulating valve and the positive pressure generating assembly are opened and the second regulating valve and the negative pressure generating assembly are closed, the positive and negative pressure switching circulating temperature control system provides a positive pressure cycle for the client system. When the first regulating valve and the positive pressure generating assembly are closed and the second regulating valve and the negative pressure generating assembly are opened, the positive and negative pressure switching circulating temperature control system provides a negative pressure for the client system. By using a set of circulating temperature control system, it is possible to provide positive pressure circulating temperature control and negative pressure circulating temperature control for the client system, which is beneficial to reducing the volume of the circulating temperature control system. At the same time, only by controlling the opening and closing of the positive pressure generating assembly, the negative pressure generating assembly and each regulating valve, the positive and negative pressure switching can be completed. The positive and negative pressure switching process is simple and convenient, without the need to stop and wait, which is convenient and fast and beneficial to improving efficiency.

[0032] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of a positive and negative pressure switching circulating temperature control system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here.

[0037] Figure 1 It is a schematic structural diagram of a positive and negative pressure switching cyclic temperature control system provided by an embodiment of the present invention. This embodiment provides a positive and negative pressure switching cyclic temperature control system. Refer to Figure 1 As shown, the positive and negative pressure switching cyclic temperature control system includes: a liquid outlet unit 12, a liquid inlet unit 13, a positive pressure generating component 14, a negative pressure generating component 15, a first regulating valve 1 and a second regulating valve 2; the liquid outlet unit 12, the first regulating valve 1, the positive pressure generating component 14, the client system 16 and the liquid inlet unit 13 are sequentially connected by pipelines to form a loop; the first end of the second regulating valve 2 is connected to the liquid outlet unit 12 by a pipeline, and the second end is connected to the client system 16 by a pipeline; the negative pressure generating component 15 is connected to the liquid inlet unit 13 by a pipeline. When the first regulating valve 1 and the positive pressure generating component 14 are opened and the second regulating valve 2 and the negative pressure generating component 15 are closed, the positive and negative pressure switching cyclic temperature control system provides positive pressure for the client system 16; when the first regulating valve 1 and the positive pressure generating component 14 are closed and the second regulating valve 2 and the negative pressure generating component 15 are opened, the positive and negative pressure switching cyclic temperature control system provides negative pressure for the client system 16.

[0038] Among them, the liquid outlet unit 12 is used to provide circulating liquid for the client system 16, that is, the circulating liquid is provided to the client system 16 by the liquid outlet unit 12 through a pipeline; the liquid inlet unit 13 is used to recover the circulating liquid, that is, to receive the circulating liquid discharged after heat exchange by the client system 16. In an optional embodiment, both the liquid outlet unit 12 and the liquid inlet unit 13 include at least one liquid storage tank to ensure sufficient circulating liquid in the system.

[0039] One end of the positive pressure generating component 14 is connected to the liquid outlet unit 12 by the first regulating valve 1, and the other end is connected to the client system 16 by a pipeline. The positive pressure generating component 14 is used to transport the circulating liquid in the liquid outlet unit 12 to the client system 16 in the form of positive pressure to provide positive pressure cyclic temperature control for the client system 16; in an optional embodiment, the positive pressure generating component 14 includes a liquid pumping pump to provide circulating liquid with a high pressure head for the client system 16.

[0040] The negative pressure generating assembly 15 is connected to the liquid inlet unit 13 through a pipeline. The negative pressure generating assembly 15 is used to create a negative pressure environment for the liquid inlet unit 13, so as to suck the circulating liquid in the pipeline through the negative pressure traction force of the liquid inlet unit 13, so as to provide negative pressure circulation temperature control for the client system 16; in an optional embodiment, the negative pressure generating assembly 15 includes a vacuum pump, so as to provide a negative pressure environment for the liquid inlet unit 13 by sucking the gas in the liquid inlet unit 13.

[0041] The first regulating valve 1 and the second regulating valve 2 can be but are not limited to solenoid valves to realize remote switching of positive and negative pressure cycles.

[0042] Specifically, the liquid outlet unit 12, the first regulating valve 1, the positive pressure generating assembly 14, the client system 16 and the liquid inlet unit 13 are sequentially connected through pipelines to form a loop. The first end of the second regulating valve 2 is connected to the liquid outlet unit 12 through a pipeline, and the second end is connected to the client system 16 through a pipeline, so that the loop formed by the liquid outlet unit 12, the first regulating valve 1, the positive pressure generating assembly 14, the client system 16 and the liquid inlet unit 13 can provide a positive pressure cycle for the client system 16. When the negative pressure generating assembly 15 provides negative pressure for the liquid inlet unit 13, the loop formed by the liquid outlet unit 12, the second regulating valve 2, the client system 16 and the liquid inlet unit 13 can provide a negative pressure cycle for the client system 16. That is, when the first regulating valve 1 and the positive pressure generating assembly 14 are opened and the second regulating valve 2 and the negative pressure generating assembly 15 are closed, the positive and negative pressure switching circulating temperature control system provides positive pressure for the client system 16. On the contrary, when the first regulating valve 1 and the positive pressure generating assembly 14 are closed and the second regulating valve 2 and the negative pressure generating assembly 15 are opened, the positive and negative pressure switching circulating temperature control system provides negative pressure for the client system 16. Thus, by controlling the opening and closing of the positive pressure generating assembly 14, the negative pressure generating assembly 15 and each regulating valve, the switching of positive and negative pressure cycles can be completed.

[0043] In this embodiment, by connecting the liquid outlet unit, the first regulating valve, the positive pressure generating assembly, the client system, and the liquid inlet unit in the circulating temperature control system with positive and negative pressure switching in sequence through pipelines to form a loop, the first end of the second regulating valve is connected to the liquid outlet unit through a pipeline, the second end is connected to the client system through a pipeline, and the negative pressure generating assembly is connected to the liquid inlet unit through a pipeline. When the first regulating valve and the positive pressure generating assembly are opened and the second regulating valve and the negative pressure generating assembly are closed, the circulating temperature control system with positive and negative pressure switching provides a positive pressure cycle for the client system. When the first regulating valve and the positive pressure generating assembly are closed and the second regulating valve and the negative pressure generating assembly are opened, the circulating temperature control system with positive and negative pressure switching provides a negative pressure cycle for the client system. By using a set of circulating temperature control system, it is possible to provide positive pressure circulating temperature control and negative pressure circulating temperature control for the client system, which is beneficial to reducing the volume of the circulating temperature control system. At the same time, only by controlling the opening and closing of the positive pressure generating assembly, the negative pressure generating assembly, and each regulating valve, the positive and negative pressure switching can be completed. The positive and negative pressure switching process is simple and convenient, without the need to stop the machine and wait, which is convenient and fast and beneficial to improving efficiency.

[0044] Optionally, continue to refer to Figure 1 As shown, the circulating temperature control system with positive and negative pressure switching further includes a third regulating valve 3 and a fourth regulating valve 4; the liquid inlet unit 13 at least includes a first liquid inlet tank 131 and a second liquid inlet tank 132; the negative pressure generating assembly 15 includes a vacuum pump; the air inlet of the vacuum pump is connected to the first liquid inlet tank 131 through the third regulating valve 3 and is connected to the second liquid inlet tank 132 through the fourth regulating valve 4, and the exhaust port of the vacuum pump is communicated with the atmosphere.

[0045] Among them, the third regulating valve 3 and the fourth regulating valve 4 can be, but are not limited to, solenoid valves to achieve remote switching of positive and negative pressure cycles. The liquid inlet unit 13 includes a first liquid inlet tank 131 and a second liquid inlet tank 132, so that the circulating liquid recovered by the liquid inlet unit 13 can selectively enter the first liquid inlet tank 131 or the second liquid inlet tank 132, thereby avoiding excessive circulating liquid in the liquid inlet unit 13.

[0046] The air inlet of the vacuum pump is connected to the first liquid inlet tank 131 through the third regulating valve 3, and the exhaust port is communicated with the atmosphere. When the third regulating valve 3 is opened, the vacuum pump evacuates the first liquid inlet tank 131 to keep the first liquid inlet tank 131 in a negative pressure environment. At the same time, the air inlet of the vacuum pump is also connected to the second liquid inlet tank 132 through the fourth regulating valve 4, and the exhaust port is communicated with the atmosphere. When the fourth regulating valve 4 is opened, the vacuum pump evacuates the second liquid inlet tank 132 to keep the second liquid inlet tank 132 in a negative pressure environment. In this way, by controlling the opening and closing of the third regulating valve 3 and the fourth regulating valve 4, the vacuum pump can evacuate the first liquid inlet tank 131 or the second liquid inlet tank 132, so that the first liquid inlet tank 131 maintains a negative pressure or the second liquid inlet tank 132 maintains a negative pressure.

[0047] Optionally, continue to refer to Figure 1 As shown, the positive and negative pressure switching cycle temperature control system further includes a fifth regulating valve 5 and a sixth regulating valve 6; the first liquid inlet tank 131 is connected to the client system 16 through the fifth regulating valve 5 by pipeline; the second liquid inlet tank 132 is connected to the client system 16 through the sixth regulating valve 6 by pipeline.

[0048] Among them, the fifth regulating valve 5 and the sixth regulating valve 6 may include, but are not limited to, solenoid valves to achieve remote switching of positive and negative pressure cycles.

[0049] The first liquid inlet tank 131 is connected to the client system 16 through the fifth regulating valve 5, so that when the fifth regulating valve 5 is opened, the circulating liquid discharged after heat exchange through the client system 16 flows back to the first liquid inlet tank 131; similarly, the second liquid inlet tank 132 is connected to the client system 16 through the sixth regulating valve 6, so that when the sixth regulating valve 6 is opened, the circulating liquid discharged after heat exchange through the client system 16 flows back to the second liquid inlet tank 132. In this way, when the cycle temperature control system performs a negative pressure cycle, according to the amount of the circulating liquid in the first liquid inlet tank 131 and the second liquid inlet tank 132, by controlling the opening and closing of the fifth regulating valve 5 and the sixth regulating valve 6, the first liquid inlet tank 131 can be used to recover the circulating liquid or the second liquid inlet tank 132 can be used to recover the circulating liquid.

[0050] Optionally, continue to refer to Figure 1 As shown, the positive and negative pressure switching cycle temperature control system further includes a seventh regulating valve 7 and an eighth regulating valve 8; the first liquid inlet tank 131 is connected to the liquid outlet unit 12 through the seventh regulating valve 7 by pipeline; the second liquid inlet tank 132 is connected to the liquid outlet unit 12 through the eighth regulating valve 8 by pipeline.

[0051] Among them, the seventh regulating valve 7 and the eighth regulating valve 8 may include, but are not limited to, solenoid valves to achieve remote control of the cycle temperature control system.

[0052] The liquid outlet unit 12 is used to provide circulating liquid for the client system 16. Therefore, during the operation of the circulating temperature control, the circulating liquid in the liquid outlet unit 12 will continuously decrease, resulting in an increasing liquid level in the liquid outlet unit 12; on the contrary, the liquid inlet unit 13 is used to recover the circulating liquid. Therefore, during the operation of the circulating temperature control system, the circulating liquid in the liquid inlet unit 13 will continuously increase, resulting in an increasing liquid level in the liquid inlet unit 13. Therefore, the first liquid inlet tank 131 is connected to the liquid outlet unit 12 through the seventh regulating valve 7. Thus, when the liquid level in the first liquid inlet tank 131 is relatively high, the seventh regulating valve 7 can be opened. At this time, the circulating liquid in the liquid outlet unit 12 and the first liquid inlet tank 131 can achieve liquid level balance. Similarly, the second liquid inlet tank 132 is connected to the liquid outlet unit 12 through the eighth regulating valve 8. Thus, when the liquid level in the second liquid inlet tank 132 is relatively high, the eighth regulating valve 8 can be opened. At this time, the circulating liquid in the liquid outlet unit 12 and the second liquid inlet tank 132 can achieve liquid level balance. In this way, during the operation of the circulating temperature control system, by controlling the opening and closing of the seventh regulating valve 7 and the eighth regulating valve 8, the liquid levels of the first liquid inlet tank 131 and the liquid outlet unit 12, as well as the liquid levels of the second liquid inlet tank 132 and the liquid outlet unit 12, can be balanced. As a result, the liquid outlet unit 12 can continuously provide circulating liquid for the client system 16 without replacing the liquid storage tank that provides circulating liquid for the client system 16. Therefore, the flow rate of the circulating liquid in the circulating temperature control system can be ensured to be stable, and manual liquid addition is not required. In addition, since the vacuum pump only evacuates or supplements air to the liquid inlet unit 13, and the liquid outlet unit 12 is not connected to the vacuum pump, the temperature and pressure of the circulating liquid in the liquid outlet unit 12 are relatively stable. Thus, the environmental stability of the circulating temperature control system can be ensured, and further the controllability of the temperature of the circulating temperature control system can be improved.

[0053] Optionally, continuing to refer to Figure 1 As shown, the positive and negative pressure switching circulating temperature control system further includes a ninth regulating valve 9 and a tenth regulating valve 10; the exhaust port of the vacuum pump is connected to the first liquid inlet tank 131 through the ninth regulating valve 9 and is connected to the second liquid inlet tank 132 through the tenth regulating valve 10.

[0054] Among them, the ninth regulating valve 9 and the tenth regulating valve 10 can but are not limited to including solenoid valves to achieve remote control of the circulating temperature control system.

[0055] The exhaust port of the vacuum pump is connected to the first liquid inlet tank 131 through the ninth regulating valve 9. When the ninth regulating valve 9 is opened, the vacuum pump can provide positive pressure for the first liquid inlet tank 131, so that when the seventh regulating valve 7 is opened, the circulating liquid in the first liquid inlet tank 131 can smoothly flow into the liquid outlet unit 12, thus accelerating the liquid level balance between the first liquid inlet tank 131 and the liquid outlet unit 12. Correspondingly, the exhaust port of the vacuum pump is also connected to the second liquid inlet tank 132 through the tenth regulating valve 10. When the tenth regulating valve 10 is opened, the vacuum pump can provide positive pressure for the second liquid inlet tank 132, so that when the eighth regulating valve 8 is opened, the circulating liquid in the second liquid inlet tank 132 can smoothly flow into the liquid outlet unit 12, thus accelerating the liquid level balance between the second liquid inlet tank 132 and the liquid outlet unit 12.

[0056] Specifically, during the operation of the circulating temperature control system, when the liquid level of the first liquid inlet tank 131 is relatively high, by controlling the opening of the seventh regulating valve 7 and the ninth regulating valve 9, the first liquid inlet tank 131 and the liquid outlet unit 12 are connected through the seventh regulating valve 7, and the vacuum pump provides positive pressure for the first liquid inlet tank 131, so that the circulating liquid in the first liquid inlet tank 131 can smoothly enter the liquid outlet unit 12 to balance the liquid levels of the first liquid inlet tank 131 and the liquid outlet unit 12. Similarly, when the liquid level of the second liquid inlet tank 132 is relatively high, by controlling the opening of the eighth regulating valve 8 and the ninth regulating valve 9, the second liquid inlet tank 132 and the liquid outlet unit 12 are connected through the eighth regulating valve 8, and the vacuum pump provides positive pressure for the second liquid inlet tank 132, so that the circulating liquid in the second liquid inlet tank 132 can smoothly enter the liquid outlet unit 12 to balance the liquid levels of the second liquid inlet tank 132 and the liquid outlet unit 12.

[0057] Optionally, referring to Figure 1 As shown, at least one liquid level sensor 17 is provided in the liquid outlet unit 12, the first liquid inlet tank 131, and the second liquid inlet tank 132.

[0058] Among them, each liquid level sensor 17 is respectively used to monitor the liquid level of the circulating liquid in the liquid outlet unit 12, the first liquid inlet tank 131, and the second liquid inlet tank 132. When the liquid level difference between the liquid outlet unit 12 and the first liquid inlet tank 131 is too large, the seventh regulating valve 7 and the ninth regulating valve 9 are opened to balance the liquid levels between the liquid outlet unit 12 and the first liquid inlet tank 131. Or, when the liquid level difference between the liquid outlet unit 12 and the second liquid inlet tank 132 is too large, the eighth regulating valve 8 and the tenth regulating valve 10 are opened to balance the liquid levels between the liquid outlet unit 12 and the second liquid inlet tank 132.

[0059] Optionally, referring to Figure 1 As shown, a first pressure sensor 18 is provided in the first liquid inlet tank 131, a second pressure sensor 19 is provided in the second liquid inlet tank 132, and a third pressure sensor 20 is provided in the liquid outlet unit 12.

[0060] Among them, the first pressure sensor 18 is used to monitor the pressure in the first liquid inlet tank 131, the second pressure sensor 19 is used to monitor the pressure in the second liquid inlet tank 132, and the third pressure sensor 20 is used to monitor the pressure in the liquid outlet unit 12. By monitoring the pressures in the first liquid inlet tank 131, the second liquid inlet tank 132, and the liquid outlet unit 12, the power of the negative pressure generating assembly 15 is adjusted according to the pressure difference between the first liquid inlet tank 131 and the liquid outlet unit 12, and the pressure difference between the second liquid inlet tank 132 and the liquid outlet unit 12. Furthermore, during negative pressure circulation, the flow rate of the circulating liquid in the circulating temperature control system is adjusted to meet the temperature requirements of the client system 16.

[0061] Optionally, continue to refer to Figure 1 As shown, a fourth pressure sensor 21 is provided on the pipeline between the positive pressure generating assembly 14 and the client load.

[0062] Among them, the fourth pressure sensor 21 is used to monitor the pressure at the outlet of the positive pressure generating assembly 14. Thus, according to the pressure at the outlet of the positive pressure generating assembly 14, the power of the positive pressure generating assembly 14 is adjusted. Furthermore, during positive pressure circulation, the flow rate of the circulating liquid in the circulating temperature control system is adjusted to meet the temperature requirements of the client system 16.

[0063] Optionally, continue to refer to Figure 1 As shown, the positive and negative pressure switching circulating temperature control system further includes a water cooling circuit 22 and a first heat exchanger 23. The water cooling circuit 22 adjusts the temperature of the circulating liquid in the pipeline between the client system 16 and the liquid inlet unit 13 through the first heat exchanger 23, thereby adjusting the temperature of the circulating liquid in the circulating temperature control system.

[0064] Specifically, the water cooling circuit 22 and the first heat exchanger 23 form a temperature control system. Since the temperature control system is arranged between the client system 16 and the liquid inlet unit 13, temperature control can be performed through the temperature control system regardless of whether the circulating temperature control system is in positive pressure circulation or negative pressure circulation.

[0065] Optionally, continue to refer to Figure 1 As shown, an eleventh regulating valve 11 is provided on the pipeline of the water cooling circuit 22; a temperature measuring unit 24 is provided on the pipeline between the liquid outlet unit 12 and the client system 16.

[0066] Among them, the temperature measuring unit 24 can be but is not limited to a temperature sensor. The temperature measuring unit 24 is used to measure the temperature at the outlet of the positive pressure generating assembly 14. Thus, according to the temperature at the outlet of the positive pressure generating assembly 14, the opening degree of the eleventh regulating valve 11 is adjusted to control the flow rate of the cooling water in the water cooling circuit 22, thereby controlling the heat exchange temperature in the first heat exchanger 23, and further enabling more precise temperature control.

[0067] The positive-pressure circulation operation principle and negative-pressure circulation operation principle of the positive-negative pressure switching cyclic temperature control system will be described below:

[0068] When the client system 16 performs positive-pressure circulation, control the negative-pressure generating component 15 (such as a vacuum pump), the second regulating valve 2, the third regulating valve 3, the fourth regulating valve 4, the ninth regulating valve 9, and the tenth regulating valve 10 to close, and control the positive-pressure generating component 14 (such as a liquid extraction pump), the first regulating valve 1, the fifth regulating valve 5, and the sixth regulating valve 6 to open, so that the circulating liquid in the liquid outlet unit 12 is conveyed to the client system 16 in the form of positive pressure. After the circulating liquid exchanges heat through the client system 16, it is cooled by the first heat exchanger 23 and finally returns to the first liquid inlet tank 131 and the second liquid inlet tank 132. According to the monitoring results of each liquid level sensor 17, when the circulating liquid in the liquid outlet unit 12 is lower than the first preset liquid level, control the seventh regulating valve 7 and the eighth regulating valve 8 to open, so that the circulating liquid in the first liquid inlet tank 131 and the second liquid inlet tank 132 flows into the liquid outlet unit 12, and when the circulating liquid in the liquid outlet unit 12 is higher than the second preset liquid level, control the seventh regulating valve 7 and the eighth regulating valve 8 to close, thereby enabling the temperature of the circulating liquid to be relatively stable.

[0069] When the client system 16 performs negative-pressure circulation, control the positive-pressure generating component 14, the first regulating valve 1, the sixth regulating valve 6, the seventh regulating valve 7, and the ninth regulating valve 9 to close, and control the negative-pressure generating component 15, the second regulating valve 2, the third regulating valve 3, the fifth regulating valve 5, and the eighth regulating valve 8 to open. At this time, the vacuum pump sucks the gas in the first liquid inlet tank 131 to keep the first liquid inlet tank 131 under negative pressure. Since the pressure in the liquid outlet unit 12 is higher than the pressure in the first liquid inlet tank 131, the circulating liquid in the liquid outlet unit 12 is output to the client system 16 under the action of the negative pressure difference. After exchanging heat through the client system 16, it is cooled by the first heat exchanger 23 and finally returns to the first liquid inlet tank 131. When the circulating liquid in the liquid outlet unit 12 is lower than the first preset liquid level, control the tenth regulating valve 10 to open. At this time, the exhaust port of the vacuum pump is connected to the second liquid inlet tank 132, so that the vacuum pump introduces positive pressure into the second liquid inlet tank 132 to form a pressure difference between the second liquid inlet pipe and the liquid outlet unit 12. The circulating liquid in the second liquid inlet tank 132 supplies liquid to the liquid outlet unit 12 under the action of the pressure difference to supplement the liquid level of the liquid outlet unit 12. At the same time, the liquid level of the circulating liquid in the second liquid inlet tank 132 drops. When the liquid level of the circulating liquid in the second liquid inlet tank 132 drops to the third preset liquid level, control the sixth regulating valve 6, the seventh regulating valve 7, and the ninth regulating valve 9, and control the third regulating valve 3, the fifth regulating valve 5, and the tenth regulating valve 10 to close. At this time, the suction object of the vacuum pump is switched from the first liquid inlet tank 131 to the second liquid inlet tank 132. The liquid level of the circulating liquid in the second liquid inlet tank 132 rises, and at the same time, the first liquid inlet tank 131 supplies liquid to the liquid outlet unit 12. In this way, by alternately maintaining negative pressure in the first liquid inlet tank 131 and the second liquid inlet tank 132, the negative-pressure circulation is completed.

[0070] This embodiment also provides a control method for a positive and negative pressure switching cycle temperature control system, and the control method includes:

[0071] S110. Obtain the target requirements of the client system.

[0072] The target requirements include a positive pressure cycle requirement and a negative pressure cycle requirement.

[0073] S120. When the positive pressure cycle requirement is obtained, control the first regulating valve and the positive pressure generating component to open, and at the same time control the second regulating valve and the negative pressure generating component to close.

[0074] S130. When the negative pressure cycle requirement is obtained, control the second regulating valve and the negative pressure generating component to open, and at the same time control the first regulating valve and the positive pressure generating component to close.

[0075] Specifically, when the positive and negative pressure switching cycle temperature control system is running, the target requirements of the client system 16 are obtained in real time. When the positive pressure cycle requirement is obtained, control the first regulating valve 1 and the positive pressure generating component 14 to open, and at the same time control the second regulating valve 2 and the negative pressure generating component 15 to close, so that the circulating liquid in the liquid outlet unit 12 is transported to the client system 16 in the form of positive pressure, and the positive and negative pressure switching cycle temperature control system provides a positive pressure cycle for the client system 16. When the negative pressure cycle requirement is obtained, control the second regulating valve 2 and the negative pressure generating component 15 to open, and at the same time control the first regulating valve 1 and the positive pressure generating component 14 to close, so that the circulating liquid in the liquid outlet unit 12 is transported to the client system 16 in the form of negative pressure, and the positive and negative pressure switching cycle temperature control system provides a negative pressure cycle for the client system 16.

[0076] In this embodiment, by obtaining the target requirements of the client system in real time, when the positive pressure cycle requirement is obtained, control the first regulating valve and the positive pressure generating component to open, and at the same time control the second regulating valve and the negative pressure generating component to close. When the negative pressure cycle requirement is obtained, control the second regulating valve and the negative pressure generating component to open, and at the same time control the first regulating valve and the positive pressure generating component to close. In this way, by using a set of cycle temperature control system, it is possible to provide positive pressure cycle temperature control and negative pressure cycle temperature control for the client system, which is beneficial to reducing the volume of the cycle temperature control system. At the same time, only by controlling the opening and closing of the positive pressure generating component, the negative pressure generating component and each regulating valve, the positive and negative pressure switching can be completed. The positive and negative pressure switching process is simple and convenient, without the need to stop the machine and wait, which is convenient and fast, and is beneficial to improving efficiency.

[0077] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A positive and negative pressure switching cyclic temperature control system, characterized in that Comprising: a liquid outlet unit, a liquid inlet unit, a positive pressure generating assembly, a negative pressure generating assembly, a first regulating valve, and a second regulating valve; The liquid outlet unit, the first regulating valve, the positive pressure generating assembly, the client system, and the liquid inlet unit are sequentially connected by pipelines to form a loop; a first end of the second regulating valve is connected to the liquid outlet unit by a pipeline, and a second end is connected to the client system by a pipeline; the negative pressure generating assembly is connected to the liquid inlet unit by a pipeline; When the first regulating valve and the positive pressure generating assembly are opened, and the second regulating valve and the negative pressure generating assembly are closed, the positive and negative pressure switching cyclic temperature control system provides positive pressure for the client system; When the first regulating valve and the positive pressure generating assembly are closed, and the second regulating valve and the negative pressure generating assembly are opened, the positive and negative pressure switching cyclic temperature control system provides negative pressure for the client system.

2. The positive and negative pressure switching cyclic temperature control system according to claim 1, characterized in that It further includes a third regulating valve and a fourth regulating valve; The liquid inlet unit at least includes a first liquid inlet tank and a second liquid inlet tank; The negative pressure generating assembly includes a vacuum pump; An air inlet of the vacuum pump is connected to the first liquid inlet tank by a pipeline through the third regulating valve and is connected to the second liquid inlet tank by a pipeline through the fourth regulating valve, and an exhaust port of the vacuum pump is communicated with the atmosphere.

3. The positive and negative pressure switching cyclic temperature control system according to claim 2, wherein It further includes: a fifth regulating valve 5 and a sixth regulating valve; The first liquid inlet tank is connected to the client system by a pipeline through the fifth regulating valve 5; the second liquid inlet tank is connected to the client system by a pipeline through the sixth regulating valve.

4. The positive and negative pressure switching cyclic temperature control system according to claim 2, characterized in that, It further includes: a seventh regulating valve and an eighth regulating valve; The first liquid inlet tank is connected to the liquid outlet unit by a pipeline through the seventh regulating valve; the second liquid inlet tank is connected to the liquid outlet unit by a pipeline through the eighth regulating valve.

5. The positive and negative pressure switching cycle temperature control system according to claim 2, wherein It further includes: a ninth regulating valve and a tenth regulating valve; An exhaust port of the vacuum pump is connected to the first liquid inlet tank by a pipeline through the ninth regulating valve and is connected to the second liquid inlet tank by a pipeline through the tenth regulating valve.

6. The positive and negative pressure switching cyclic temperature control system according to claim 2, wherein At least one liquid level sensor is provided in each of the liquid outlet unit, the first liquid inlet tank, and the second liquid inlet tank.

7. The positive and negative pressure switching cyclic temperature control system according to claim 2, wherein A first pressure sensor is provided in the first liquid inlet tank, a second pressure sensor is provided in the second liquid inlet tank, and a third pressure sensor is provided in the liquid outlet unit.

8. The positive and negative pressure switching cyclic temperature control system according to claim 1, wherein A fourth pressure sensor is provided on a pipeline between the positive pressure generating assembly and the client load.

9. The positive and negative pressure switching cycle temperature control system according to claim 1, characterized in that It further includes a water cooling circuit and a first heat exchanger; The water cooling circuit adjusts the temperature of the circulating liquid in the pipeline between the client system and the liquid inlet unit through the first heat exchanger.

10. The positive and negative pressure switching cycle temperature control system according to claim 9, characterized in that, An eleventh regulating valve is provided on the pipeline of the water cooling circuit; A temperature measuring unit is provided on the pipeline between the liquid outlet unit and the client system.

11. A control method for a positive and negative pressure switching cyclic temperature control system, characterized in that, The positive and negative pressure switching cyclic temperature control system includes a liquid outlet unit, a liquid inlet unit, a positive pressure generating component, a negative pressure generating component, a first regulating valve and a second regulating valve; the liquid outlet unit, the first regulating valve, the positive pressure generating component, the client system and the liquid inlet unit are sequentially connected by pipelines to form a loop; a first end of the second regulating valve is connected to the liquid outlet unit by a pipeline, and a second end thereof is connected to the client system by a pipeline; the negative pressure generating component is connected to the liquid inlet unit by a pipeline; the control method includes: Obtain the target requirements of the client system; the target requirements include positive pressure cycle requirements and negative pressure cycle requirements; When the positive pressure cycle requirement is obtained, control the first regulating valve and the positive pressure generating component to open, and at the same time control the second regulating valve and the negative pressure generating component to close; When the negative pressure cycle requirement is obtained, control the second regulating valve and the negative pressure generating component to open, and at the same time control the first regulating valve and the positive pressure generating component to close.

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