Oil cooling machine with filtering and oil-water separation functions

Abstract

This utility model relates to an oil cooler, which includes an evaporator, a cooling medium circuit connected to the cooling medium side of the evaporator, and a high-temperature oil circuit connected to the oil side of the evaporator. The high-temperature oil circuit is an open circuit, including an oil inlet, an oil supply pump, the oil side of the evaporator, a first oil filter, and a first oil outlet connected in sequence by pipes. An overflow valve and a second oil outlet are also connected in sequence by pipes between the oil outlet of the evaporator and the first oil filter. When there are many impurities in the first oil filter, affecting the smooth flow of oil, the oil pressure exceeds the preset pressure value of the overflow valve. At this time, the overflow valve opens, and the oil flows back to the oil tank through the overflow valve. The user only needs to clean the impurities in the first oil filter when stopping the machine; it will not affect the normal operation of the external hydraulic system, and the oil cooler has high reliability.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to an oil cooler with filtration and oil-water separation functions. Background Technology

[0002] When a hydraulic system operates for an extended period of time, the hydraulic oil tank is connected to the atmosphere, inevitably allowing water, dust, and other impurities to enter the oil. Over time, this will severely affect the quality of the hydraulic oil and impair the normal operation of the hydraulic system.

[0003] An oil cooler is an industrial device that circulates and cools media such as oil by utilizing the principle of heat absorption through evaporation of the cooling medium. However, after prolonged use, the oil filter is prone to clogging by impurities in the oil, affecting the smooth flow of the oil and consequently impacting the normal operation of the external hydraulic system.

[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 an oil cooler with filtration and oil-water separation functions, in order to solve the problem that after long-term use, the oil filter becomes clogged, affecting oil flow and thus the operation of the external hydraulic system.

[0006] The technical solution adopted in this utility model is as follows: An oil cooler with filtration and oil-water separation functions is provided. The oil cooler includes an evaporator, a cooling medium circuit connected to the cooling medium side of the evaporator, and a high-temperature oil circuit connected to the oil side of the evaporator. The high-temperature oil circuit is an open circuit, including an oil inlet, an oil supply pump, an evaporator oil side, a first oil filter, and a first oil outlet connected in sequence by pipes. An overflow valve and a second oil outlet are also connected in sequence by pipes between the evaporator oil side outlet and the first oil filter.

[0007] A further technical solution is to install a second oil filter on the pipeline between the oil inlet and the oil supply pump.

[0008] A further technical solution is that the filtration accuracy of the first oil filter is greater than that of the second oil filter.

[0009] A further technical solution is that an oil-water separator is installed on the pipeline between the oil-side outlet of the evaporator and the first oil filter, and the overflow valve inlet is connected between the oil-water separator and the first oil filter through a pipeline.

[0010] A further technical solution is that the oil-water separator is also connected to a drain outlet via a pipe.

[0011] A further technical solution is to install a temperature sensor at the oil inlet.

[0012] A further technical solution is that 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.

[0013] A further technical solution is that a high-pressure regulator and a condensing regulator are sequentially installed on the pipeline between the rotor compressor and the condenser; a first liquid filling valve and a drying filter are sequentially installed on the pipeline between the condenser and the thermostatic expansion valve; and a low-pressure regulator and a second liquid filling valve are sequentially installed on the pipeline between the outlet of the evaporator cooling medium side and the rotor compressor.

[0014] The beneficial effects of this utility model embodiment are as follows: (I) The oil cooler of this utility model is constructed by connecting a first oil filter, a first oil outlet, an overflow valve, and a second oil outlet in parallel in a high-temperature oil circuit. When there are many impurities in the first oil filter, which affect the smooth flow of the oil, the oil circuit pressure exceeds the preset pressure value of the overflow valve. At this time, the overflow valve opens, and the oil flows back to the oil tank through the overflow valve. The user only needs to clean the impurities in the first oil filter when stopping the machine. It will not affect the normal operation of the external hydraulic system, and the oil cooler has high reliability.

[0015] (ii) Furthermore, a second oil filter is installed on the pipeline between the oil inlet and the oil supply pump. The filtration accuracy of the first oil filter is greater than that of the second oil filter. The second oil filter is a Y-type filter, which filters larger particles of impurities. The Y-type filter has high filtration efficiency, and impurities settle to the drain port, making it less prone to clogging. It also has low internal fluid resistance, resulting in greater energy savings. The first oil filter is a precision filter, which filters smaller particles of impurities through multi-stage physical interception. This staged filtration makes the pipeline less prone to clogging, further improving the reliability of the oil cooler.

[0016] (iii) Furthermore, an oil-water separator is installed on the pipeline between the oil side outlet of the evaporator and the first oil filter. The oil-water separator separates the water in the oil and discharges the separated water through the drain outlet to improve the quality of the oil. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the oil cooler of this utility model.

[0018] In the picture: 1. Oil inlet; 11. Oil supply pump; 12. Temperature sensor; 13. Second oil filter; 2. Evaporator; 3. Oil-water separator; 31. Drain outlet; 41. First oil filter; 42. First oil outlet; 51. Overflow valve; 52. Second oil outlet; 6. Rotary compressor; 61. Low-pressure regulator; 62. High-pressure regulator; 7. Condenser; 71. Condenser regulator; 72. Dryer filter; 8. Thermal expansion valve; 91. First liquid filling valve; 92. Second liquid filling valve. Detailed Implementation

[0019] 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.

[0020] Example: This embodiment discloses an oil cooler with filtration and oil-water separation functions.

[0021] like Figure 1 As shown, the oil cooler includes an evaporator 2, a cooling medium circuit connected to the cooling medium side of the evaporator 2, and a high-temperature oil circuit connected to the oil side of the evaporator 2. The high-temperature oil circuit is an open circuit, including an oil inlet 1, an oil supply pump 11, the oil side of the evaporator 2, a first oil filter 41, and a first oil outlet 42 connected in sequence via pipes. An overflow valve 51 and a second oil outlet 52 are also connected in sequence between the oil side outlet of the evaporator 2 and the first oil filter 41 via pipes. Specifically, in this application, "in sequence" refers to the direction of medium flow. The oil inlet 1, the first oil outlet 42, and the second oil outlet 52 are connected to the same external oil tank. The oil tank is connected to external working machinery, and 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] like Figure 1 As shown, a second oil filter 13 is further installed on the pipeline between the oil inlet 1 and the oil supply pump 11. Preferably, the filtration accuracy of the first oil filter 41 is greater than that of the second oil filter 13. The second oil filter 13 is a commercially available Y-type filter, which filters larger particles of impurities. Y-type filters have high filtration efficiency, and impurities settle to the drain port, making them less prone to clogging. They also have low internal fluid resistance and are more energy-efficient. The first oil filter 41 is a commercially available precision filter, which filters smaller particles of impurities through multi-stage physical interception.

[0023] like Figure 1 As shown, furthermore, an oil-water separator 3 is installed on the pipeline between the oil-side outlet of the evaporator 2 and the first oil filter 41. The inlet of the overflow valve 51 is connected between the oil-water separator 3 and the first oil filter 41 through a pipeline. The oil-water separator 3 separates water from the oil. The oil-water separator 3 is also connected to a drain outlet 31 through a pipeline, through which the separated water is discharged.

[0024] like Figure 1 As shown, a temperature sensor 12 is further installed at the oil inlet 1 to detect the oil temperature at the oil inlet 1.

[0025] like Figure 1 As shown, the cooling medium circuit is a closed circuit, including a rotor compressor 6, a condenser 7, a thermostatic expansion valve 8, and an evaporator 2 connected in sequence by pipes on the cooling medium side.

[0026] like Figure 1 As shown, furthermore, a high-pressure controller 62 and a condensing pressure controller 71 are sequentially installed on the pipeline between the rotor compressor 6 and the condenser 7. A first liquid charging valve 91 and a dryer filter 72 are sequentially installed on the pipeline between the condenser 7 and the thermal expansion valve 8. A low-pressure controller 61 and a second liquid charging valve 92 are sequentially installed on the pipeline between the outlet of the evaporator 2 on the cooling medium side and the rotor compressor 6. Specifically, when the low-pressure controller 61 detects that the pressure in the pipeline is lower than the set value, the low-pressure controller 61 automatically cuts off the power supply to the rotor compressor 6. When the high-pressure controller 62 detects that the pressure in the pipeline is higher than the set value, the high-pressure controller 62 automatically cuts off the power supply to the rotor compressor 6 to protect the rotor compressor 6 and extend the service life of the oil cooler. The condenser 7 is a fan-type condenser 7. The condensing pressure controller 71 controls the speed of the fan in the condenser 7 to prevent excessive condensing pressure from causing the rotor compressor 6 to overheat or the system to malfunction, thereby balancing heat dissipation efficiency and the reliability of the oil cooler. The dryer filter 72 absorbs moisture in the cooling medium to prevent moisture from freezing in the pipeline and corroding components in the system. The cooling medium circuit is supplied with cooling medium through the first liquid filling valve 91 and the second liquid filling valve 92.

[0027] In this embodiment, during operation, the rotor compressor 6 draws in a low-temperature, low-pressure gaseous cooling medium and compresses it into a high-temperature, high-pressure gas. The high-temperature, high-pressure gas enters the condenser 7, where the cooling medium exchanges heat with the outside air and condenses into a high-pressure liquid. The thermostatic expansion valve 8 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, turning it into a low-temperature, low-pressure wet vapor. When passing through the evaporator 2, the cooling medium absorbs heat from the high-temperature oil and vaporizes through the appropriate heat exchange area of ​​the evaporator 2, thereby cooling the high-temperature oil. It then re-enters the compressor, and the cycle repeats, thus controlling the inlet oil temperature.

[0028] In this embodiment, when there are many impurities in the first oil filter 41, which affects the smooth flow of oil, the oil circuit pressure exceeds the preset pressure value of the overflow valve 51. At this time, the overflow valve 51 opens, and the oil flows back to the oil tank through the overflow valve 51. The user only needs to clean the impurities in the first oil filter 41 when stopping the machine. It will not affect the normal operation of the external hydraulic system, and the oil cooler has high reliability.

[0029] 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. An oil cooler with filtration and oil-water separation functions, characterized in that, The oil cooler includes an evaporator, a cooling medium circuit connected to the cooling medium side of the evaporator, and a high-temperature oil circuit connected to the oil side of the evaporator. The high-temperature oil circuit is an open circuit, including an oil inlet, an oil supply pump, an evaporator oil side, a first oil filter, and a first oil outlet connected in sequence by pipes. An overflow valve and a second oil outlet are also connected in sequence between the evaporator oil side outlet and the first oil filter by pipes.

2. The oil cooler with filtration and oil-water separation functions according to claim 1, characterized in that: A second oil filter is installed on the pipeline between the oil inlet and the oil supply pump.

3. The oil cooler with filtration and oil-water separation functions according to claim 2, characterized in that: The filtration accuracy of the first oil filter is greater than that of the second oil filter.

4. The oil cooler with filtration and oil-water separation functions according to claim 1, characterized in that: An oil-water separator is installed on the pipeline between the oil-side outlet of the evaporator and the first oil filter, and the overflow valve inlet is connected between the oil-water separator and the first oil filter through a pipeline.

5. The oil cooler with filtration and oil-water separation functions according to claim 4, characterized in that: The oil-water separator is also connected to a drain outlet via a pipe.

6. The oil cooler with filtration and oil-water separation functions according to claim 1, characterized in that: A temperature sensor is installed at the oil inlet.

7. The oil cooler with filtration and oil-water separation functions according to claim 1, characterized in that: 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.

8. The oil cooler with filtration and oil-water separation functions according to claim 7, characterized in that: A high-pressure regulator and a condenser regulator are sequentially installed on the pipeline between the rotary compressor and the condenser. A first liquid filling valve and a dryer filter are sequentially installed on the pipeline between the condenser and the thermostatic expansion valve. A low-pressure regulator and a second liquid filling valve are sequentially installed on the pipeline between the outlet of the evaporator on the cooling medium side and the rotary compressor.

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