Direct forced refrigeration type high temperature oil cooler

Abstract

The utility model relates to a kind of direct forced cooling type high-temperature oil cooling machine, direct forced cooling type high-temperature oil cooling machine includes evaporator, oil circuit and cooling medium loop;Oil circuit is open loop, including the oil inlet, oil supply pump, evaporator oil side and oil outlet sequentially through pipeline connection;Cooling medium loop is closed loop, including rotor compressor, condenser, thermal expansion valve and evaporator cooling medium side sequentially through pipeline connection.The utility model is cooled by the proper evaporator heat exchange area, cooling medium absorbs high-temperature oil heat and vaporization, realize the cooling of high-temperature oil, subsequently reenter rotor compressor, reciprocating, by temperature sensor detection oil inlet oil temperature and control the start-stop of rotor compressor, so as to be able to control oil inlet oil temperature to be about 65 ℃, namely equivalent to control oil tank inner oil temperature, system structure is simple, equipment cost is low.

Description

Technical Field

[0001] This utility model relates to the field of cooling machine technology, and in particular to a direct forced cooling type high temperature oil cooler. Background Technology

[0002] Normally, the oil inlet temperature of an oil cooler is controlled at 30~40℃. Under special operating conditions, the oil inlet temperature needs to be controlled at around 65~75℃, which is a higher temperature. Accordingly, the evaporator needs to be specially designed for this special operating condition, greatly increasing the heat exchange area of ​​the evaporator to ensure the normal operation of the refrigeration system.

[0003] To maintain an extremely high inlet oil temperature, a chiller unit is typically used to produce chilled water at a specific temperature. This chilled water is then pumped to an oil-water heat exchanger for heat exchange. The temperature controller adjusts the electric three-way proportional valve in the water circuit based on the collected evaporator inlet oil temperature, thereby regulating the amount of cooling water entering the heat exchanger and ultimately controlling the inlet oil temperature. However, this system is complex and has high equipment costs.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model discloses a direct forced cooling type high-temperature oil cooler.

[0006] The technical solution adopted in this utility model is as follows: A direct forced cooling high-temperature oil cooler includes an evaporator, an oil circuit, and a cooling medium circuit. The oil circuit is an open circuit, including an oil inlet, an oil supply pump, an evaporator oil side, and an oil outlet connected in sequence by pipes. The cooling medium circuit is a closed circuit, including a rotor compressor, a condenser, a thermostatic expansion valve, and an evaporator cooling medium side connected in sequence by pipes. The direct forced cooling high-temperature oil cooler also includes a temperature sensor installed at the oil inlet to detect the oil temperature at the inlet.

[0007] A further technical solution is that the oil inlet temperature is 65~75℃, and the heat exchange area of ​​the evaporator is adjusted according to the oil inlet temperature.

[0008] A further technical solution is that the direct forced cooling high-temperature oil cooler includes: a low-pressure controller, which is installed on the pipeline between the evaporator cooling medium side and the rotor compressor; and a high-pressure controller, which is installed on the pipeline between the rotor compressor and the condenser.

[0009] A further technical solution is that the condenser is a fan-type condenser; the direct forced cooling high-temperature oil cooler includes: a condenser pressure controller, which is installed on the pipeline between the high-pressure pressure controller and the condenser.

[0010] A further technical solution is that the direct forced cooling high-temperature oil cooler includes: a dryer filter, which is installed on the pipeline between the condenser and the thermal expansion valve.

[0011] A further technical solution is that the direct forced cooling high-temperature oil cooler includes: a first liquid filling valve, which is installed on the pipeline between the low-pressure controller and the rotor compressor; and a second liquid filling valve, which is installed on the pipeline between the condenser and the dryer filter.

[0012] A further technical solution is that the direct forced cooling high-temperature oil cooler also includes a controller, which is electrically connected to the temperature sensor and the rotor compressor.

[0013] The beneficial effects of this utility model embodiment are as follows: This invention relates to a direct forced cooling high-temperature oil cooler. A rotary compressor draws in a low-temperature, low-pressure gaseous cooling medium and compresses it into a high-temperature, high-pressure gas. This high-temperature, high-pressure gas enters the condenser, where the cooling medium exchanges heat with the outside air and condenses into a high-pressure liquid. A thermostatic expansion valve automatically adjusts its opening based on the temperature of the cooling medium to regulate the flow rate and pressure of the high-pressure liquid cooling medium, transforming it into low-temperature, low-pressure wet steam. Passing through the evaporator, the cooling medium absorbs heat from the high-temperature oil and vaporizes through an appropriate heat exchange area, thus cooling the oil. The steam then re-enters the rotary compressor, repeating the cycle. A temperature sensor detects the oil temperature at the inlet and controls the start and stop of the rotary compressor, thereby controlling the inlet oil temperature to approximately 65-75°C, which is equivalent to controlling the oil temperature inside the oil tank. The system has a simple structure and low equipment cost.

[0014] In addition, since the oil temperature at the inlet needs to be controlled at an extremely high temperature, the cooling medium will continue to absorb heat from the oil after evaporation in the evaporator, causing the return gas temperature of the cooling medium entering the rotary compressor after passing through the evaporator to rise significantly, possibly reaching about 40°C. The cooler in this embodiment uses a rotary compressor, which can tolerate a return gas temperature of 35~45°C, so it can meet the operating requirements. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the direct forced cooling high-temperature oil cooler of this utility model.

[0016] Figure 2 This is a connection diagram of the direct forced cooling high-temperature oil cooler of this utility model.

[0017] In the picture: 1. Rotary compressor; 11. Low-pressure regulator; 12. High-pressure regulator; 2. Condenser; 21. Condensing regulator; 3. Thermostatic expansion valve; 4. Evaporator; 5. Oil inlet; 51. Oil supply pump; 52. Temperature sensor; 6. Oil outlet; 7. Dryer filter; 81. First liquid filling valve; 82. Second liquid filling valve; 9. Controller. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] Example: This embodiment discloses a direct forced cooling type high-temperature oil cooler.

[0020] like Figure 1 As shown, the direct forced cooling type high temperature oil cooler includes an evaporator 4, an oil circuit, and a cooling medium circuit.

[0021] The oil circuit is an open loop, including an oil inlet 5, an oil supply pump 51, an oil side of an evaporator 4, and an oil outlet 6, which are connected in sequence by pipes. Specifically, the oil inlet 5 and the oil outlet 6 are connected to the same external oil tank, which is connected to external working machinery. The heat generated by the working machinery is carried back to the oil tank by the oil, causing the oil in the tank to heat up.

[0022] The cooling medium circuit is a closed circuit, including a rotor compressor 1, a condenser 2, a thermostatic expansion valve 3, and an evaporator 4 connected in sequence by pipes on the cooling medium side.

[0023] like Figure 1 As shown, the direct forced cooling high-temperature oil cooler further includes a temperature sensor 52, which is located at the oil inlet 5 to detect the oil temperature at the oil inlet 5.

[0024] like Figure 1 As shown, the oil inlet temperature of oil inlet 5 is 65~75℃, and the heat exchange area of ​​evaporator 4 is adjusted according to the oil inlet temperature of oil inlet 5. Specifically, the heat exchange area of ​​evaporator 4 is reduced, for example, by reducing the number of parallel coil groups or using larger pipe diameters, thereby reducing the heat absorbed by evaporator 4 to maintain the high oil temperature of oil inlet 5.

[0025] like Figure 1As shown, the direct forced cooling high-temperature oil cooler further includes a low-pressure controller 11 and a high-pressure controller 12. The low-pressure controller 11 is installed on the pipeline between the evaporator 4 (cooling medium side) and the rotary compressor 1. When the low-pressure controller 11 detects that the pressure in the pipeline is lower than a set value, it automatically cuts off the power supply to the rotary compressor 1. The high-pressure controller 12 is installed on the pipeline between the rotary compressor 1 and the condenser 2. When the high-pressure controller 12 detects that the pressure in the pipeline is higher than a set value, it automatically cuts off the power supply to the rotary compressor 1 to protect it and extend the cooler's service life.

[0026] like Figure 1 As shown, the condenser 2 is further described as a fan-type condenser 2. The direct forced cooling high-temperature oil cooler includes a condenser pressure controller 21, which is installed on the pipeline between the high-pressure controller 12 and the condenser 2. The condenser pressure controller 21 controls the speed of the fan of the condenser 2 to prevent the rotor compressor 1 from overheating or the system from malfunctioning due to excessive condensing pressure, thereby balancing heat dissipation efficiency and cooler reliability.

[0027] For example Figure 1 As shown, the direct forced cooling high-temperature oil cooler further includes a dryer filter 7, which is installed on the pipeline between the condenser 2 and the thermal expansion valve 3 to absorb moisture in the cooling medium and prevent moisture from freezing in the pipeline and corroding the components in the system.

[0028] like Figure 1 As shown, the direct forced cooling high-temperature oil cooler further includes a first filling valve 81 and a second filling valve 82. The first filling valve 81 is located on the pipeline between the low-pressure controller 11 and the rotary compressor 1. The second filling valve 82 is located on the pipeline between the condenser 2 and the dryer filter 7, and the cooling medium is replenished to the cooling medium circuit through the first filling valve 81 and the second filling valve 82.

[0029] like Figure 2 As shown, the direct forced cooling high-temperature oil cooler further includes a controller 9, which is electrically connected to the temperature sensor 52 and the rotor compressor 1.

[0030] In this embodiment, the rotary compressor 1 draws in a low-temperature, low-pressure gaseous cooling medium and compresses it into a high-temperature, high-pressure gas. This high-temperature, high-pressure gas enters the condenser 2, where the cooling medium exchanges heat with the outside air and condenses into a high-pressure liquid. Thermostatic expansion valve 3 automatically adjusts its opening according to the temperature of the cooling medium to regulate the flow rate and pressure of the high-pressure liquid cooling medium, transforming it into low-temperature, low-pressure wet vapor. Passing through the evaporator 4, the cooling medium absorbs heat from the high-temperature oil and vaporizes through the appropriate heat exchange area, thus cooling the high-temperature oil. It then re-enters the rotary compressor 1, repeating the cycle. The controller 9 receives the oil temperature detected by the temperature sensor 52 at the oil inlet 5 and controls the start and stop of the rotary compressor 1, thereby controlling the oil inlet temperature at approximately 65-75°C, which is equivalent to controlling the oil temperature inside the oil tank. The system has a simple structure and low equipment cost.

[0031] Furthermore, because the oil temperature at the oil inlet 5 needs to be controlled at an extremely high temperature, the cooling medium continues to absorb heat from the oil after evaporation in the evaporator 4. This causes the return gas temperature of the cooling medium entering the rotary compressor 1 after passing through the evaporator 4 to rise significantly, potentially reaching around 40°C. The return gas temperature of the scroll compressor 1 is typically around 18~25°C, which cannot meet the usage requirements. In this embodiment, the cooler uses a rotary compressor 1, which can tolerate a return gas temperature of 35~45°C, thus meeting the operating requirements.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A direct forced cooling type high-temperature oil cooler, characterized in that: The direct forced cooling high-temperature oil cooler includes an evaporator, an oil circuit, and a cooling medium circuit; the oil circuit is an open circuit, including an oil inlet, an oil supply pump, an evaporator oil side, and an oil outlet connected in sequence by pipes; the cooling medium circuit is a closed circuit, including a rotor compressor, a condenser, a thermostatic expansion valve, and an evaporator cooling medium side connected in sequence by pipes. The direct forced cooling high-temperature oil cooler also includes: A temperature sensor is installed at the oil inlet to detect the oil temperature at the inlet.

2. The direct forced cooling high-temperature oil cooler according to claim 1, characterized in that: The oil inlet temperature is 65~75℃, and the heat exchange area of ​​the evaporator is adjusted according to the oil inlet temperature.

3. The direct forced cooling high-temperature oil cooler according to claim 1, characterized in that: The direct forced cooling type high-temperature oil cooler includes: A low-pressure regulator is installed on the pipeline between the evaporator cooling medium side and the rotary compressor; A high-pressure regulator is installed on the pipeline between the rotor compressor and the condenser.

4. The direct forced cooling high-temperature oil cooler according to claim 3, characterized in that: The condenser is a fan-type condenser; the direct forced cooling high-temperature oil cooler includes: A condensing pressure controller is installed on the pipeline between the high-pressure pressure controller and the condenser.

5. The direct forced cooling high-temperature oil cooler according to claim 4, characterized in that: The direct forced cooling type high-temperature oil cooler includes: A drying filter is installed on the pipeline between the condenser and the thermal expansion valve.

6. The direct forced cooling high-temperature oil cooler according to claim 5, characterized in that: The direct forced cooling type high-temperature oil cooler includes: The first liquid filling valve is installed on the pipeline between the low-pressure controller and the rotary compressor; The second liquid filling valve is installed on the pipeline between the condenser and the dryer filter.

7. The direct forced cooling high-temperature oil cooler according to claim 1, characterized in that: The direct forced cooling high-temperature oil cooler also includes a controller, which is electrically connected to the temperature sensor and the rotor compressor.

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