A cold oil type high and low temperature integrated temperature control system

Abstract

The utility model discloses a cold oil type high low temperature integral temperature control system belongs to temperature control equipment technical field, include: cold oil storage tank, first oil pump, second oil pump, evaporimeter, heat exchanger, third oil pump, electric heater, throttling device, condenser, compressor, heat conducting oil import valve, heat conducting oil export valve, expansion tank and liquid discharge valve, the condenser, throttling device, evaporimeter and compressor are connected in proper order and constitute refrigeration cycle system, the cold oil storage tank is connected with first oil pump and second oil pump respectively, and first oil pump connects evaporimeter, and second oil pump connects heat exchanger, evaporimeter and cold oil storage tank circulation intercommunication form cold oil circuit, the utility model discloses refrigeration cycle system and heat conducting oil heating system are integrated into one, realize the double temperature area control of cooling and heating, and the response speed is faster, and adopt cold oil as intermediate cooling medium, replace traditional water cooling mode, avoid the pipeline burst pressure risk caused by cooling water vaporization under high temperature.

Description

Technical Field

[0001] This utility model relates to the field of temperature control equipment technology, specifically to a cold oil type high and low temperature integrated temperature control system. Background Technology

[0002] During the molding or heating process, the mold or press head of the molding press needs to be kept at a high temperature, which is generally achieved by using heat transfer oil as the heat medium. However, in actual production, the heat transfer oil must have high stability and good circulation cooling control when the working temperature reaches 300-350℃.

[0003] Traditional molding press temperature control often uses a single water-cooled condenser heat exchanger structure to reduce oil temperature. Cooling water is used as the medium in the system. However, when high-temperature heat transfer oil and cooling water come into contact in the heat exchanger, water vaporization is easily caused, resulting in air resistance and high pressure, and even pipeline rupture, which poses a serious safety hazard.

[0004] Based on this, this utility model designs a cold oil type high and low temperature integrated temperature control system to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a cold oil type high and low temperature integrated temperature control system to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cold oil type high and low temperature integrated temperature control system, comprising: a cold oil storage tank, a first oil pump, a second oil pump, an evaporator, a heat exchanger, a third oil pump, an electric heater, a throttling device, a condenser, a compressor, a heat transfer oil inlet valve, a heat transfer oil outlet valve, an expansion tank, and a drain valve; The condenser, throttling device, evaporator and compressor are connected in sequence to form a refrigeration cycle system; The cold oil storage tank is connected to the first oil pump and the second oil pump respectively. The first oil pump is connected to the evaporator and the second oil pump is connected to the heat exchanger. The evaporator is connected to the cold oil storage tank in a circulating manner to form a cold oil circuit, and the heat exchanger is connected to the cold oil storage tank in a circulating manner to form a heat exchange oil circuit. The pipeline between the heat transfer oil inlet valve and the electric heater is wound around the heat exchanger wall. The outlet of the electric heater is connected to the external equipment oil circuit through the heat transfer oil outlet valve. The inlet end of the heat transfer oil inlet valve is connected to the expansion tank and the drain valve.

[0007] Preferably, the first oil pump is used to transport the oil in the cold oil storage tank to the evaporator for cooling, and to return the cooled oil to the cold oil storage tank to maintain the cold oil temperature circulation.

[0008] Preferably, the second oil pump is used to transport the oil in the cold oil storage tank to the heat exchanger, and after cooling the heat transfer oil through the heat exchanger, it is returned to the cold oil storage tank.

[0009] Preferably, the electric heater is used to heat the heat transfer oil to an operating temperature of 350°C and supply oil to external equipment through the heat transfer oil outlet valve. Preferably, the third oil pump is installed on the oil inlet pipe of the electric heater to increase the circulating pressure of the heat transfer oil and enhance the stability of heating and oil supply.

[0010] Preferably, the expansion tank is connected to the heat transfer oil inlet valve via a conduit, which is used to absorb the volume change of the heat transfer oil during high-temperature circulation and maintain stable system pressure.

[0011] Preferably, the drain valve is located on the heat transfer oil inlet valve branch and is used for heat transfer oil replacement or system purging.

[0012] Preferably, the refrigeration cycle system and the heat transfer oil cycle system share a heat exchanger to achieve coordinated control of the cooling and heating dual temperature zones, thereby precisely regulating the temperature of the heat transfer oil in the external equipment.

[0013] Preferably, the top of the cold oil storage tank is equipped with a temperature detection device and a safety pressure relief port for real-time monitoring of the cold oil temperature and prevention of system overpressure.

[0014] Preferably, the compressor drives the refrigerant to circulate between the condenser, the throttling device, and the evaporator, thereby achieving continuous cooling of the oil and energy recovery and utilization.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: it integrates the refrigeration cycle system and the heat transfer oil heating system into one, realizes dual-temperature zone control of cooling and heating, has a faster response speed, and uses cold oil as the intermediate cooling medium to replace the traditional water cooling method, avoiding the risk of pipeline bursting due to the vaporization of cooling water at high temperature. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structural distribution of this embodiment.

[0018] The attached diagram lists the components represented by each number as follows: 1. Cold oil storage tank; 2. First oil pump; 3. Second oil pump; 4. Evaporator; 5. Heat exchanger; 6. Third oil pump; 7. Electric heater; 8. Throttling device; 9. Condenser; 10. Compressor; 11. Heat transfer oil inlet valve; 12. Heat transfer oil outlet valve; 13. Expansion tank; 14. Drain valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 This utility model provides a technical solution: a cold oil type high and low temperature integrated temperature control system, including: a cold oil storage tank 1, a first oil pump 2, a second oil pump 3, an evaporator 4, a heat exchanger 5, a third oil pump 6, an electric heater 7, a throttling device 8, a condenser 9, a compressor 10, a heat transfer oil inlet valve 11, a heat transfer oil outlet valve 12, an expansion tank 13, and a drain valve 14; The condenser 9, the throttling device 8, the evaporator 4, and the compressor 10 are connected in sequence to form a refrigeration cycle system; The cold oil storage tank 1 is connected to the first oil pump 2 and the second oil pump 3 respectively. The first oil pump 2 is connected to the evaporator 4 and the second oil pump 3 is connected to the heat exchanger 5. Evaporator 4 is connected to cold oil storage tank 1 in a circulating manner to form a cold oil circuit, and heat exchanger 5 is connected to cold oil storage tank 1 in a circulating manner to form a heat exchange oil circuit. The pipeline between the heat transfer oil inlet valve 11 and the electric heater 7 is wound and connected to the heat exchange wall of the heat exchanger 5. The outlet of the electric heater 7 is connected to the external equipment oil circuit through the heat transfer oil outlet valve 12. The inlet end of the heat transfer oil inlet valve 11 is connected to the expansion tank 13 and the drain valve 14. The system interconnects cold oil storage tank 1, evaporator 4, heat exchanger 5, electric heater 7, and refrigeration cycle system, using cold oil instead of water as the heat exchange medium to achieve coordinated regulation of cooling and heating of the heat transfer oil. This avoids the safety hazards of easy vaporization in water-cooled systems, achieves efficient heat exchange between cold oil and heat transfer oil, features an integrated structure, and offers a wide temperature control range and high stability.

[0021] More preferably, the first oil pump 2 is used to transport the oil in the cold oil storage tank 1 to the evaporator 4 for cooling, and to return the cooled oil to the cold oil storage tank 1 to maintain the cold oil temperature circulation. The first oil pump 2 sends the oil from the cold oil storage tank 1 to the evaporator 4 for cooling, and then returns the cooled oil to the storage tank, achieving continuous circulation and regulation of the cold oil temperature. The evaporator 4 maintains a constant cold oil temperature, providing a stable low-temperature medium for subsequent heat exchange, improving overall refrigeration efficiency and extending equipment life.

[0022] More preferably, the second oil pump 3 is used to transport the oil in the cold oil storage tank 1 to the heat exchanger 5, and after cooling the heat transfer oil through the heat exchanger 5, it is returned to the cold oil storage tank 1. The second oil pump 3 transports the low-temperature oil from the cold oil storage tank 1 to the heat exchanger 5. After oil-to-oil heat exchange between the heat exchanger 5 and the heat transfer oil circuit, the oil returns to the storage tank. This achieves indirect heat exchange between the cold oil and the heat transfer oil, eliminating the need for water cooling, reducing energy consumption and risk, maintaining a stable temperature of the heat transfer oil, and ensuring a safe and reliable cooling process.

[0023] More preferably, the electric heater 7 is used to heat the heat transfer oil to the operating temperature of 350°C and supply oil to external equipment through the heat transfer oil outlet valve 12; The electric heater 7 heats the heat transfer oil at high temperatures, outputting hot oil at 350°C to meet standard requirements for use in equipment such as molding presses, maintaining the equipment's operating temperature. Through precise temperature control, it achieves rapid heating and continuous heat preservation, replacing combustion heating methods. This results in faster heating, higher energy efficiency, and safer operation.

[0024] In a further preferred embodiment, the third oil pump 6 is installed on the oil inlet pipe of the electric heater 7 to increase the circulating pressure of the heat transfer oil and enhance the stability of heating and oil supply; The third oil pump 6 is located in the oil inlet pipe of the electric heater 7. By increasing the circulation pressure of the heat transfer oil, it makes the oil flow smoother and the heating more uniform. It effectively prevents local stagnation and overheating of high-temperature oil, enhances the system's fluidity and heat transfer efficiency, and ensures the safety of the heating process and a balanced temperature distribution.

[0025] More preferably, the expansion tank 13 is connected to the heat transfer oil inlet valve 11 via a conduit, which is used to absorb the volume change of the heat transfer oil during high-temperature circulation and maintain the system pressure stability; The expansion tank 13 is connected to the heat transfer oil inlet valve 11, and balances the pressure by absorbing the volume change of the heat transfer oil when it expands due to heat. This prevents the system from overpressure due to temperature rise, ensures the long-term stable operation of the heat transfer oil circulation system, and improves safety and seal life.

[0026] In a further preferred embodiment, the drain valve 14 is located on the branch of the heat transfer oil inlet valve 11 and is used for heat transfer oil replacement or system purging. A liquid valve is installed on a branch of the heat transfer oil inlet valve 11 for the replacement, purging, and discharge of heat transfer oil during maintenance. This facilitates system maintenance and oil replacement, prevents residual oil from carbonizing and clogging pipelines, and improves maintenance efficiency and equipment reliability.

[0027] In a further preferred embodiment, the refrigeration cycle system and the heat transfer oil cycle system share the same heat exchanger 5, realizing coordinated control of the cooling and heating dual temperature zones, thereby precisely regulating the temperature of the heat transfer oil of the external equipment; The refrigeration system and the heat transfer oil circulation system share heat exchanger 5, achieving dual-temperature zone control by utilizing the same heat exchange wall for both cold and heat transfer oils. Cooling and heating operate in tandem, dynamically balancing the temperature, improving control accuracy, and the system features a compact structure, saving space and reducing energy consumption.

[0028] Preferably, the top of the cold oil storage tank 1 is equipped with a temperature detection device and a safety pressure relief port for real-time monitoring of the cold oil temperature and prevention of system overpressure; The top of the cold oil storage tank 1 is equipped with a temperature detection device and a safety pressure relief port for real-time monitoring of the cold oil temperature and automatic pressure relief protection. This enables system operation status monitoring and over-temperature protection, preventing malfunctions caused by abnormal temperature rise or pressure accumulation, and ensuring long-term safe operation of the system.

[0029] In a further preferred embodiment, the compressor 10 drives the refrigerant to circulate between the condenser 9, the throttling device 8, and the evaporator 4, thereby achieving continuous cooling of the cold oil and energy recovery and utilization. The compressor 10 drives the refrigerant to circulate between the condenser 9, the throttling device 8, and the evaporator 4, achieving continuous cooling of the cold oil through heat absorption during evaporation. The refrigeration system is stable and efficient, continuously providing low-temperature oil and a constant-temperature cold source for cooling the heat transfer oil, achieving energy recycling and energy-saving operation.

[0030] One specific application of this embodiment is: starting the compressor 10 drives the refrigerant to circulate between the condenser 9, the throttling device 8, and the evaporator 4; the refrigerant absorbs heat from the cold oil in the evaporator 4 and then evaporates, thereby cooling the cold oil; the first oil pump 2 sends the cooled oil back to the cold oil storage tank 1, forming a closed-loop cold oil circuit. Start the second oil pump 3 to transport the low-temperature cold oil in the cold oil storage tank 1 to the heat exchanger 5 to cool and exchange the high-temperature heat transfer oil in the winding pipeline of the heat exchanger 5, and then return it to the cold oil storage tank 1 to achieve circulating cooling. When the molding press needs to be heated, open the heat transfer oil inlet valve 11 and the heat transfer oil outlet valve 12, and start the third oil pump 6; the heat transfer oil enters the heat exchanger 5 wall tube through the inlet valve, and after being initially cooled to room temperature by the heat exchanger 5, it enters the electric heater 7 and is heated to the set temperature of 350°C. Then, it is delivered to the heating component of the molding press through the heat transfer oil outlet valve 12 to provide heat energy for the equipment.

[0031] When the molding machine finishes running or needs to cool down quickly, turn off the heating function of the electric heater 7, while keeping the heat exchanger 5 and cold oil circulating. At this time, the heat transfer oil flows back after being cooled by the heat exchanger 5 in the circuit, which quickly reduces the system oil temperature and realizes mold cooling protection. In the high-temperature circulation of heat transfer oil, the expansion tank 13 acts as a buffer to absorb changes in oil volume and maintain stable system pressure. If oil replacement or maintenance is required, the drain valve 14 can be opened to discharge the oil. The cold oil storage tank 1 is equipped with a temperature sensor and a pressure relief port to monitor the cold oil temperature and automatically relieve pressure in case of abnormal pressure.

[0032] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms should be interpreted broadly. For example, a term can refer to a fixed connection, a detachable connection, or an integral part; a term can refer to a mechanical connection or an electrical connection; a term can refer to a direct connection or an indirect connection through an intermediate medium; a term can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold oil type high and low temperature integrated temperature control system, characterized in that, include: It includes a cold oil storage tank (1), a first oil pump (2), a second oil pump (3), an evaporator (4), a heat exchanger (5), a third oil pump (6), an electric heater (7), a throttling device (8), a condenser (9), a compressor (10), a heat transfer oil inlet valve (11), a heat transfer oil outlet valve (12), an expansion tank (13), and a drain valve (14). The condenser (9), throttling device (8), evaporator (4) and compressor (10) are connected in sequence to form a refrigeration cycle system; The cold oil storage tank (1) is connected to the first oil pump (2) and the second oil pump (3) respectively. The first oil pump (2) is connected to the evaporator (4) and the second oil pump (3) is connected to the heat exchanger (5). The evaporator (4) is connected to the cold oil storage tank (1) in a circulating manner to form a cold oil circuit, and the heat exchanger (5) is connected to the cold oil storage tank (1) in a circulating manner to form a heat exchange oil circuit. The pipeline between the heat transfer oil inlet valve (11) and the electric heater (7) is wound and connected to the heat exchange wall of the heat exchanger (5). The outlet of the electric heater (7) is connected to the external equipment oil circuit through the heat transfer oil outlet valve (12). The inlet end of the heat transfer oil inlet valve (11) is connected to the expansion tank (13) and the drain valve (14).

2. The integrated high and low temperature control system of oil cooling type according to claim 1, characterized in that: The first oil pump (2) is used to transport the oil in the cold oil storage tank (1) to the evaporator (4) for cooling, and to return the cooled oil to the cold oil storage tank (1) to maintain the cold oil temperature circulation.

3. The integrated high and low temperature control system of cold oil type according to claim 1, characterized in that: The second oil pump (3) is used to transport the oil in the cold oil storage tank (1) to the heat exchanger (5), and after the heat transfer oil is cooled by the heat exchanger (5), it is returned to the cold oil storage tank (1).

4. The integrated high and low temperature control system of cold oil type according to claim 1, characterized in that: The electric heater (7) is used to heat the heat transfer oil to a working temperature of 350°C and supply oil to external equipment through the heat transfer oil outlet valve (12).

5. The integrated high and low temperature control system of cold oil type according to claim 1, characterized in that: The third oil pump (6) is installed on the oil inlet pipe of the electric heater (7) to increase the circulating pressure of the heat transfer oil and enhance the stability of heating and oil supply.

6. The integrated high and low temperature control system of oil cooling type according to claim 1, characterized in that: The expansion tank (13) is connected to the heat transfer oil inlet valve (11) through a conduit, and is used to absorb the volume change of the heat transfer oil in the high temperature cycle and maintain the system pressure stability.

7. The integrated high and low temperature control system of cold oil type according to claim 1, characterized in that: The drain valve (14) is located on the branch of the heat transfer oil inlet valve (11) and is used for heat transfer oil replacement or system venting.

8. The integrated high and low temperature control system of oil cooling type according to claim 1, characterized in that: The refrigeration cycle system and the heat transfer oil cycle system share a heat exchanger (5) to achieve coordinated control of the cooling and heating dual temperature zones, thereby accurately regulating the temperature of the heat transfer oil of the external equipment.

9. The integrated high and low temperature control system of oil cooling type according to claim 1, characterized in that: The top of the cold oil storage tank (1) is equipped with a temperature detection device and a safety pressure relief port for real-time monitoring of the cold oil temperature and prevention of system overpressure.

10. The integrated high and low temperature control system of oil cooling type according to claim 1, characterized in that: The compressor (10) drives the refrigerant to circulate between the condenser (9), the throttling device (8), and the evaporator (4), thereby achieving continuous cooling of the oil and energy recovery.

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