Temperature control system capable of rapidly switching cold oil temperature and hot oil temperature

Abstract

The utility model discloses a temperature control system capable of rapidly switching cold and hot oil temperatures, which comprises a hot oil circulating system, the hot oil circulating system comprises a gas-liquid separator, a hot oil circulating pump, a heater and an oil tank which are sequentially communicated through pipelines, the heater is communicated with an inlet of a client, the gas-liquid separator is communicated with an outlet of the client, and the hot oil circulating pump is communicated with the oil tank. The heater is communicated with the gas-liquid separator through a hot oil loop; the cold oil circulating system comprises a cold oil tank, a cold oil circulating pump and a heat exchanger which are sequentially communicated through a pipeline, the heat exchanger is communicated with an inlet of the client side, the cold oil tank is communicated with an outlet of the client side, an oil outlet of the heat exchanger is further communicated with an oil inlet of the cold oil tank through a cold oil loop, and a sixth switch valve is arranged on the cold oil loop. According to the application, different temperature environments can be alternately switched according to requirements, meanwhile, the preheating, precooling and heat preservation effects are achieved, the temperature difference time for different temperature switching is shortened, quick response of temperature switching is achieved, and temperature difference fluctuation generated during temperature switching is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control, in particular to a temperature control system for quickly switching between hot and cold oil temperatures. Background Art

[0002] The rapid temperature control system for hot and cold oil tanks uses thermal oil as a medium, raising and lowering the temperature of the oil through heating pipes and heat exchangers. This oil is then circulated through a thermal oil circulation pipeline to heat-consuming equipment for industrial production, such as reactors and injection molding machines, all of which require a temperature control system. However, industrial production requires rapid switching between high and low temperatures, which places high demands on the timeliness and efficiency of temperature switching. Existing temperature control systems suffer from slow switching speeds, poor efficiency, and large temperature fluctuations, significantly affecting yield rates. Utility Model Content

[0003] Based on the defects of the existing temperature control system such as slow high and low temperature switching speed, poor efficiency, and large temperature difference, this application proposes a temperature control system with rapid switching between hot and cold oil temperatures.

[0004] The technical solution adopted by the utility model is: a temperature control system for rapid switching of hot and cold oil temperatures, comprising: a hot oil circulation system, the hot oil circulation system comprising a gas-liquid separator, a hot oil circulation pump and a heater connected in sequence through pipelines, the outlet of the heater being connected to the inlet of the client through a first switch valve, the inlet of the gas-liquid separator being connected to the outlet of the client through a second switch valve, the outlet of the heater being further connected to the inlet of the gas-liquid separator through a hot oil circuit, the hot oil circuit being provided with a third switch valve, the hot oil circulation system further comprising a hot oil tank, the oil outlet of the hot oil tank being connected to the inlet of the hot oil circulation pump; a cold oil circulation system, the cold oil circulation system comprising a cold oil tank, a cold oil circulation pump and a heat exchanger connected in sequence through pipelines, the oil outlet of the heat exchanger being connected to the inlet of the client through a fourth switch valve, the oil inlet of the cold oil tank being connected to the outlet of the client through a fifth switch valve, the oil outlet of the heat exchanger being further connected to the oil inlet of the cold oil tank through a cold oil circuit, and the cold oil circuit being provided with a sixth switch valve.

[0005] Furthermore, the oil outlet of the hot oil tank is connected to the inlet of the hot oil circulation pump through an oil supply pipe, and a ball valve is provided on the oil supply pipe. The hot oil tank is also provided with a liquid level switch, an air inlet, an oil supply port and an oil drain port. The air inlet is connected to the air outlet at the top of the gas-liquid separator through an air pipe, and an exhaust solenoid valve is provided on the air pipe.

[0006] Furthermore, a liquid level balancing pipe is connected between the hot oil tank and the cold oil tank.

[0007] Furthermore, a first bypass pipe is provided between the outlet of the heater and the inlet of the gas-liquid separator.

[0008] Furthermore, a temperature sensor is provided on the heater, a pressure switch is provided on the pipeline connecting the hot oil circulation pump and the heater, a temperature sensor and a pressure gauge are provided on the pipeline connecting the heater and the client, and a pressure gauge is provided on the connecting pipeline between the oil outlet of the heat exchanger and the client.

[0009] Furthermore, the cold oil tank is also provided with a temperature sensor, a liquid level switch, an oil replenishment port and an oil drain port.

[0010] Furthermore, a second bypass pipe is provided between the oil inlet of the cold oil tank and the oil outlet of the heat exchanger.

[0011] Furthermore, the heat exchanger also includes a cooling water inlet and a cooling water outlet. The cooling water inlet pipe is connected to a pneumatic angle seat valve, a pressure switch and a pressure gauge, and the cooling water outlet pipe is connected to a check valve.

[0012] Furthermore, an oil drain pipe is provided at the bottom of the hot oil circulation system and the cold oil circulation system, one end of the oil drain pipe is an oil drain port, and a ball valve is provided on the oil drain pipe.

[0013] Furthermore, a temperature sensor and a stop valve are provided on the inlet pipeline of the client, and a temperature sensor, a filter and a stop valve are provided on the outlet pipeline of the client.

[0014] When the temperature of the oil cooler is increased or decreased, the oil cooler will be put into circulation when the oil cooler is cooled, and the oil cooler will be put into circulation when the oil cooler is cooled. In this way, the client can switch alternately to different temperature environments according to needs, and it has preheating, precooling and insulation effects, reducing the temperature difference time due to switching between different temperatures, achieving rapid response to temperature switching, and reducing temperature fluctuations caused by temperature switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic diagram of the connection structure of the temperature control system in this utility model.

[0017] The main figures in this application are:

[0018] 1. Hot oil circulation system; 11. Gas-liquid separator; 12. Hot oil circulation pump; 13. Heater; 14. First on / off valve; 15. Second on / off valve; 16. Hot oil circuit; 17. Third on / off valve; 18. Hot oil tank; 181. Liquid level switch; 182. Air inlet; 183. Oil supply port; 184. Oil drain port; 111. Air pipe; 112. Exhaust solenoid valve; 161. First bypass pipe; 19. Oil supply pipe; 2. Cold oil circulation system; 21. Cold oil tank; 22. Cold oil circulation pump; 23. Heat exchanger; 24. Fourth on-off valve; 25. Fifth on-off valve; 26. Cold oil circuit; 27. Sixth on-off valve; 28. Second bypass pipe; 3. Client; 4. Temperature sensor; 5. Cooling water inlet; 6. Cooling water outlet; 7. Pneumatic angle seat valve; 8. Check valve; 9. Ball valve; 10. Liquid level balance pipe; 102. Pressure switch; 103. Pressure gauge; 104. Oil drain pipe; 105. Stop valve. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to illustrate the relationship between one element or feature shown in the figure and another element or feature.

[0021] This application proposes a temperature control system for rapid switching of hot and cold oil temperatures, such as Figure 1 As shown, the temperature control system for rapid switching of hot and cold oil temperatures in this application mainly consists of two parts, namely the hot oil circulation system 1 and the cold oil circulation system 2. The hot oil circulation system 1 and the cold oil circulation system 2 are both connected to the client 3 in a controllable on-off manner to freely switch between high and low temperatures.

[0022] Specifically, the hot oil circulation system 1 includes a hot oil tank 18, a gas-liquid separator 11, a hot oil circulation pump 12 and a heater 13, wherein the gas-liquid separator 11, the hot oil circulation pump 12 and the heater 13 are connected to each other in sequence, the outlet of the heater 13 is connected to the inlet of the client 3 through the first switch valve 14, the inlet of the gas-liquid separator 11 is connected to the outlet of the client 3 through the second switch valve 15, the outlet of the heater 13 is also connected to the inlet of the gas-liquid separator 11 through a hot oil circuit 16, the hot oil circuit 16 is provided with a third switch valve 17, the oil outlet of the hot oil tank 18 is connected to the inlet of the hot oil circulation pump 12, and these components constitute a complete hot oil cycle loop, the heater 13 heats the heat transfer medium (hot oil) through gas, electricity or other means to increase the temperature of the hot oil, and the hot oil circulation pump 12 is responsible for circulating the hot oil. Hot oil may be contaminated by air or other gases in industrial production. The function of the gas-liquid separator 11 is to separate the gas in the hot oil to ensure the purity and safety of the hot oil. The first and second switch valves 15 are used to control the on and off of the hot oil and adjust the flow direction of the hot oil circulation loop to meet the needs under different process conditions; the setting of the hot oil loop 16 enables the hot oil circulation system 1 to self-circulate, thereby ensuring the constant temperature of the hot oil inside the hot oil circulation system 1.

[0023] The oil outlet of the hot oil tank 18 is connected to the inlet of the hot oil circulation pump 12 through an oil supply pipe 19, and a ball valve 9 is provided on the oil supply pipe 19. The hot oil tank 18 is also provided with a liquid level switch 181, an air inlet 182, an oil supply port 183 and an oil drain port 184. The air inlet 182 is connected to the air outlet at the top of the gas-liquid separator 11 through an air pipe 111, and an exhaust solenoid valve 112 is provided on the air pipe 111. The hot oil tank 18 is used to store the hot oil in the system. The oil outlet is the hot oil tank 18. The hot oil in the hot oil circulation pump 12 flows to the outlet of the hot oil circulation pump 12, and the oil replenishment pipe 19 connects the oil outlet of the hot oil tank 18 and the inlet of the hot oil circulation pump 12. The hot oil is replenished through the pipeline. The ball valve 9 is installed on the oil replenishment pipe 19 to control the flow of the hot oil. It can be opened or closed manually to adjust or stop the replenishment of the hot oil. The liquid level switch 181 is installed on the hot oil tank 18 to detect and monitor the oil level in the hot oil tank 18. When the oil level is too high or too low, the liquid level switch 181 will Send a signal so that the automatic control system can make corresponding adjustments (such as stopping heating or starting oil replenishment). The air inlet 182 is used to allow the air of the gas-liquid separator 11 to enter the hot oil tank 18 to balance the pressure. The air pipe 111 connects the air inlet 182 and the air outlet at the top of the gas-liquid separator 11 to ensure the gas balance between the hot oil tank 18 and the gas-liquid separator 11. The exhaust solenoid valve 112 is installed on the air pipe 111 to control the discharge of gas. The solenoid valve can be automatically opened or closed according to system requirements to maintain the pressure stability in the system; the oil replenishment port 183 is used to replenish hot oil, and the oil drain port 184 is used to empty the hot oil in the hot oil tank 18; a first bypass pipe 161 is also provided between the outlet of the heater 13 and the inlet of the gas-liquid separator 11. When the system needs to be adjusted quickly or respond to emergencies, the first bypass pipe 161 can be used to bypass the gas-liquid separator 11 and directly introduce the heated oil into the use link.

[0024] Through the above design, the entire hot oil circulation system 1 can achieve stable hot oil supply, effective liquid level monitoring and reliable pressure balance, maintain the stability of the internal pressure of the system, and improve the safety and efficiency of the system.

[0025] Furthermore, a temperature sensor 4 is provided on the heater 13, a pressure switch 102 is provided on the pipeline connecting the hot oil circulation pump 12 and the heater 13, a temperature sensor 4 and a pressure gauge 103 are provided on the pipeline connecting the heater 13 and the client 3, and a pressure gauge 103 is provided on the pipeline connecting the oil outlet of the heat exchanger 23 and the client 3. The temperature sensor 4 is used to monitor the oil temperature inside the heater 13 to ensure that the oil reaches the required working temperature. By monitoring the temperature, the system can automatically adjust the working state of the heater 13 to maintain a stable oil temperature. The pressure switch 102 is used to monitor the temperature of the pipeline. If the oil pressure in the pipeline becomes abnormal, such as too high or too low, the system can respond accordingly, such as stopping or starting the hot oil circulation pump 12 to protect the pipeline and equipment from damage. The temperature sensor 4 monitors the temperature of the oil entering the pipeline 3 to ensure that the oil temperature meets the operating requirements of the pipeline 3 before entering the pipeline 3. The pressure gauge 103 is used to monitor the pressure changes of the oil during the transmission process to ensure that the pipeline system is within the normal operating range and to remind the operator to pay attention to the changes in the pipeline pressure to ensure that the pressure of the oil meets the operating requirements of the pipeline 3 when entering the pipeline 3. In summary, by continuously monitoring the temperature and pressure changes of the oil, the system can automatically adjust the operating status to ensure that the oil is within the normal operating range, thereby ensuring the safe and stable operation of the system.

[0026] The cold oil circulation system 2 consists of a cold oil tank 21, a cold oil circulation pump 22, and a heat exchanger 23. The oil outlet of the heat exchanger 23 is connected to the inlet of the client 3 via a fourth on-off valve 24, while the oil inlet of the cold oil tank 21 is connected to the outlet of the client 3 via a fifth on-off valve 25. Furthermore, the oil outlet of the heat exchanger 23 is connected to the oil inlet of the cold oil tank 21 via a cold oil circuit 26, which is equipped with a sixth on-off valve 27. The cold oil tank 21 is equipped with a temperature sensor 4, a liquid level switch 181, an oil replenishment port 183, and an oil drain port 184. A second bypass pipe 28 is also provided between the oil inlet of the cold oil tank 21 and the oil outlet of the heat exchanger 23. The cold oil circulation pump 22 circulates the cold oil through the heat exchanger 23 for cooling, and then delivers it back to the client 3 equipment. Through the cold oil circuit 26 connected to the cold oil tank 21, the cold oil flows back from the oil outlet of the heat exchanger 23 to the oil inlet of the cold oil tank 21. When the cold oil circulation system 2 is shut down, the cold oil can be recycled, improving the efficiency of the heat exchanger 23, allowing it to fully exert its cooling function and ensure the oil temperature within the cold oil circulation system 2. The cold oil tank 21 is equipped with a temperature sensor 4, a liquid level switch 181, an oil replenishment port 183, and an oil drain port 184, which monitor the temperature and level of the cold oil in real time and replenish and drain the heat transfer oil in a timely manner. The fourth, fifth, and sixth on-off valves and the second bypass pipe 28 allow for flexible control of the cold oil flow path and flow rate. The cold oil supply rate and cooling effect can be adjusted according to actual needs to adapt to different operating conditions and load requirements.

[0027] In addition, the heat exchanger 23 also includes a cooling water inlet 5 and a cooling water outlet 6. The pipe of the cooling water inlet 5 is connected to a filter, a pneumatic angle seat valve 7, a pressure switch 102 and a pressure gauge 103, while the pipe of the cooling water outlet 6 is connected to a check valve 8. Through the circulation and heat exchange of cooling water, the oil temperature inside the heat exchanger 23 can be effectively reduced, kept within the normal operating temperature range, and the stability and reliability of the system can be improved.

[0028] Furthermore, a liquid level balancing pipe 10 is connected between the hot oil tank 18 and the cold oil tank 21. The liquid level balancing pipe 10 can avoid sudden oil dumping due to the liquid level difference between the hot oil tank 18 and the cold oil tank 21, ensure that the oil flows smoothly between the two tanks, and reduce the impact caused by liquid level changes. The liquid level balancing pipe 10 can effectively reduce the pressure difference between the hot oil tank 18 and the cold oil tank 21, reduce the risk of oil leakage inside the system, and protect equipment and environmental safety.

[0029] An oil drain pipe 104 is provided at the bottom of the hot oil circulation system 1 and the cold oil circulation system 2. One end of the oil drain pipe 104 is an oil drain port. A ball valve 9 is provided on the oil drain pipe 104. Through the oil drain pipe 104 and the ball valve 9, old oil, dirty oil or oil that needs to be replaced in the system can be easily discharged, which facilitates the maintenance and care of the system.

[0030] In addition, a temperature sensor 4 and a stop valve 105 are provided on the pipeline at the inlet of the client 3, and a temperature sensor 4, a filter and a stop valve 105 are provided on the pipeline at the outlet of the client 3. In this way, by monitoring the temperature changes at the inlet and outlet of the client 3, the working status of the system can be understood in a timely manner to avoid equipment damage or production quality problems caused by abnormal temperature. The stop valves 105 are provided at the inlet and outlet of the client 3, and the flow rate and pressure of the oil can be adjusted as needed to ensure stable operation of the system and protect the pipeline and equipment from being affected by excessively high or low pressure.

[0031] Preferably, the first, second, third, fourth, forty-fifth and sixth switch valves in the present application are all pneumatic angle seat valves.

[0032] The working method of the present application is as follows: when the client is heated or kept at a constant temperature, the hot oil circulation system is connected to the client, that is, the first and second switch valves are opened, and the heat-conducting oil of the hot oil circulation system will circulate with the client equipment, and at this time the fourth and fifth switch valves in the cold oil circulation system will be closed, the bypass sixth switch valve is opened, and the heat-conducting oil in the cold oil circulation pump pipeline will circulate internally, and the cold oil after heat exchange will be stored in the cold oil tank, so that the oil temperature inside the cold oil circulation system is at a low level; when the client needs to cool down, the heat-conducting oil of the cold oil circulation system will circulate with the client equipment, that is, the fourth and fifth switch valves are opened, and the sixth switch valve is closed at the same time, and the cold oil of the cold oil circulation system is introduced into the client, at the same time, the first and second switch valves are closed, and the third switch valve is opened to realize the hot oil self-circulation, thereby ensuring the hot oil temperature, the heat-conducting oil in the hot oil circulation pump pipeline will circulate internally, and the heated hot oil will be stored in the hot oil tank for the next heating use. In this way, the client can switch alternately to different temperature environments according to needs, and it has preheating, precooling and insulation effects, reducing the temperature difference time due to switching between different temperatures, achieving rapid response to temperature switching, and reducing temperature fluctuations caused by temperature switching.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temperature control system for rapid switching between hot and cold oil temperatures, characterized in that: include: A hot oil circulation system (1) includes a gas-liquid separator (11), a hot oil circulation pump (12), and a heater (13) connected in sequence through pipelines. The outlet of the heater (13) is connected to the inlet of the client (3) through a first switch valve (14). The inlet of the gas-liquid separator (11) is connected to the outlet of the client (3) through a second switch valve (15). The outlet of the heater (13) is also connected to the inlet of the gas-liquid separator (11) through a hot oil circuit (16). The hot oil circuit (16) is provided with a third switch valve (17). The hot oil circulation system (1) also includes a hot oil tank (18). The oil outlet of the hot oil tank (18) is connected to the inlet of the hot oil circulation pump (12). A cold oil circulation system (2) is provided, wherein the cold oil circulation system (2) comprises a cold oil tank (21), a cold oil circulation pump (22) and a heat exchanger (23) which are connected in sequence through pipelines; the oil outlet of the heat exchanger (23) is connected to the inlet of the client (3) through a fourth switch valve (24); the oil inlet of the cold oil tank (21) is connected to the outlet of the client (3) through a fifth switch valve (25); the oil outlet of the heat exchanger (23) is also connected to the oil inlet of the cold oil tank (21) through a cold oil circuit (26); and the cold oil circuit (26) is provided with a sixth switch valve (27).

2. The temperature control system according to claim 1, characterized in that: The oil outlet of the hot oil tank (18) is connected to the inlet of the hot oil circulation pump (12) through an oil supply pipe (19), and a ball valve (9) is provided on the oil supply pipe (19). The hot oil tank (18) is also provided with a liquid level switch (181), an air inlet (182), an oil supply port (183) and an oil drain port (184). The air inlet (182) is connected to the air outlet at the top of the gas-liquid separator (11) through an air pipe (111), and an exhaust solenoid valve (112) is provided on the air pipe (111).

3. The temperature control system according to claim 1, characterized in that: A liquid level balancing pipe (10) is also connected between the hot oil tank (18) and the cold oil tank (21).

4. The temperature control system according to claim 1, characterized in that: A first bypass pipe (161) is further provided between the outlet of the heater (13) and the inlet of the gas-liquid separator (11).

5. The temperature control system according to claim 1, characterized in that: The heater (13) is provided with a temperature sensor (4), the pipeline connecting the hot oil circulation pump (12) and the heater (13) is also provided with a pressure switch (102), the pipeline connecting the heater (13) and the client (3) is also provided with a temperature sensor (4) and a pressure gauge (103), and the pipeline connecting the oil outlet of the heat exchanger (23) and the client (3) is provided with a pressure gauge (103).

6. The temperature control system according to claim 1, characterized in that: The cold oil tank (21) is also provided with a temperature sensor (4), a liquid level switch (181), an oil replenishing port (183) and an oil drain port (184).

7. The temperature control system according to claim 1, characterized in that: A second bypass pipe (28) is further provided between the oil inlet of the cold oil tank (21) and the oil outlet of the heat exchanger (23).

8. The temperature control system according to claim 1, characterized in that: The heat exchanger (23) further comprises a cooling water inlet (5) and a cooling water outlet (6); the pipeline of the cooling water inlet (5) is connected to a pneumatic angle seat valve (7), a pressure switch (102) and a pressure gauge (103); the pipeline of the cooling water outlet (6) is connected to a check valve (8).

9. The temperature control system according to claim 1, characterized in that: The bottoms of the hot oil circulation system (1) and the cold oil circulation system (2) are both provided with an oil drain pipe (104), one end of the oil drain pipe (104) is an oil drain port, and a ball valve (9) is provided on the oil drain pipe (104).

10. The temperature control system according to claim 1, characterized in that: A temperature sensor (4) and a stop valve (105) are provided on the inlet pipeline of the client (3), and a temperature sensor (4), a filter and a stop valve (105) are provided on the outlet pipeline of the client (3).

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