Oil cooling system

Abstract

The invention discloses an oil cooling system, which relates to the field of cooling technology. Specifically, it comprises a refrigerant circulation loop with an oil separator and an oil cooler, and is characterized in that it also comprises a siphon tank, on which a cooling component for cooling the oil cooler is provided; and a liquid replenishing component for generating negative pressure in the siphon tank when the liquid refrigerant in the siphon tank is lower than a preset value, so as to draw liquid refrigerant from the refrigerant circulation loop and replenish it in the siphon tank, and the liquid replenishing component and the cooling component work asynchronously. It is intended to avoid the influence of height on the siphon tank.

Description

Technical Field

[0001] The invention relates to the field of cooling technology, in particular to an oil cooling system. Background Art

[0002] In order to ensure the normal exhaust temperature of the compressor in the refrigeration system, the refrigerant oil needs to be cooled and then supplied to the compressor to reduce the exhaust temperature. When using a thermal siphon oil cooling system, a certain amount of refrigerant storage is required inside the siphon tank to ensure the normal cooling of the oil cooling system. Therefore, the siphon tank needs to be installed at a lower position than the condenser to store the refrigerant in the siphon tank. However, in most units, due to the overall height limitation, the condenser installation height is relatively low, and the siphon tank cannot be installed at this time. Only other additional forms of oil cooling such as air cooling or water cooling can be used, making the cooling system extremely complicated.

[0003] In the refrigerant circulation loop, how to avoid the impact of height on the siphon tank has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The main object of the present invention is to provide an oil cooling system aimed at avoiding the influence of height on the siphon tank.

[0005] In order to achieve the above-mentioned purpose, the present invention proposes an oil cooling system, including a refrigerant circulation loop with an oil separator and an oil cooler, and also including a siphon tank, on which is provided a cooling component for cooling the oil cooler; and a fluid replenishing component that generates negative pressure in the siphon tank when the liquid refrigerant in the siphon tank is lower than a preset value, so as to draw liquid refrigerant from the refrigerant circulation loop and replenish it in the siphon tank, and the fluid replenishing component works asynchronously with the cooling component.

[0006] In one embodiment of the present application, the fluid replenishment component includes:

[0007] A first tube body, one end of which is connected to the air inlet of the compressor in the refrigerant circulation loop, and the other end of which is connected to the top of the siphon tank, for generating negative pressure in the siphon tank; and

[0008] The second tube body has one end connected to the bottom of the siphon tank and the other end connected to the liquid outlet of the condenser in the refrigerant circulation loop, and is used to absorb the liquid refrigerant discharged from the liquid outlet of the condenser.

[0009] In one embodiment of the present application, a check valve is provided on the second tube body.

[0010] In one embodiment of the present application, a first electromagnetic valve capable of opening or closing the first tube body is disposed on the first tube body.

[0011] In one embodiment of the present application, the cooling assembly comprises:

[0012] A third pipe body, one end of which is connected to the siphon tank and the other end of which is connected to the oil cooler, and is used to introduce the liquid refrigerant in the siphon tank into the oil cooler; and

[0013] The fourth pipe body has one end connected to the oil cooler and the other end connected to the siphon tank, and is used to introduce the gaseous refrigerant generated after heat exchange into the siphon tank.

[0014] In one embodiment of the present application, the cooling assembly further includes:

[0015] The fifth tube body has one end connected to the top of the siphon tank and the other end connected to the air inlet of the condenser, and is used to discharge the gaseous refrigerant in the siphon tank to balance the pressure in the siphon tank.

[0016] In one embodiment of the present application, a second electromagnetic valve for opening or closing the fifth tube is provided on the fifth tube.

[0017] In one embodiment of the present application, at least two liquid level sensors are also provided in the siphon tank;

[0018] When there are two liquid level sensors, they are a first liquid level sensor and a second liquid level sensor.

[0019] When the liquid level in the siphon tank is lower than the first liquid level sensor, the first electromagnetic valve is opened and the second electromagnetic valve is closed;

[0020] When the liquid level in the siphon tank is greater than the second liquid level sensor, the first electromagnetic valve is closed and the second electromagnetic valve is opened.

[0021] By adopting the above technical scheme, a cooling component and a fluid replenishing component are arranged on the siphon tank. The cooling component is used to cool the high-temperature lubricating oil in the oil cooler, and the fluid replenishing component is used to replenish the liquid refrigerant in the siphon tank when the liquid refrigerant in the siphon tank is lower than a preset value. Since it is completed in the form of negative pressure, the siphon tank can be installed at any height relative to the condenser, so that the siphon tank is in the refrigerant circulation loop, avoiding the influence of the installation height on the siphon tank. The structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0025] like Figure 1 As shown, in order to achieve the above-mentioned purpose, the present invention proposes an oil cooling system, including a refrigerant circulation loop with an oil separator 50 and an oil cooler 90, and also including a siphon tank 80, on which is provided a cooling component for cooling the oil cooler 90; and a fluid replenishing component that generates a negative pressure in the siphon tank 80 when the liquid refrigerant in the siphon tank 80 is lower than a preset value, so as to draw liquid refrigerant from the refrigerant circulation loop to replenish the liquid refrigerant in the siphon tank 80, and the fluid replenishing component works asynchronously with the cooling component.

[0026] Specifically, an oil cooling system includes a refrigerant circulation loop with an oil separator 50 and an oil cooler 90, a siphon tank 80, a cooling component, and a liquid replenishing component.

[0027] The refrigerant circulation circuit includes: a condenser 20 , an evaporator 40 , a throttling element 30 , and a compressor 10 .

[0028] The condenser 20 adopts the condenser 20 commonly used in the prior art, and its main function is to condense the gaseous refrigerant into liquid refrigerant.

[0029] The evaporator 40 adopts the evaporator 40 commonly used in the prior art, and its main function is to convert the liquid refrigerant into the gaseous refrigerant.

[0030] The throttling element 30 adopts the throttling element 30 commonly used in the prior art, and its main function is to reduce the pressure of the liquid refrigerant.

[0031] The compressor 10 adopts a centrifugal compressor 10 commonly used in the prior art, and its main function is to convert low-temperature gaseous refrigerant into high-temperature gaseous refrigerant.

[0032] The oil separator 50 is a conventional oil separator 50 in the prior art, and its main function is to separate the mixture of lubricating oil and refrigerant at the exhaust port of the compressor 10, so that the lubricating oil and the refrigerant are separated from each other. Since it is a prior art, it will not be described in detail here.

[0033] The oil cooler 90 is an oil cooler commonly used in the prior art, and its main function is to cool the high-temperature lubricating oil separated by the oil separator 50. Since it is a prior art, it will not be described in detail here.

[0034] The output end of the compressor 10 is connected to the condenser 20, the output end of the condenser 20 is connected to the throttling element 30, the output end of the throttling element 30 is connected to the evaporator 40, and the output end of the evaporator 40 is connected to the input end of the compressor 10, thereby forming a complete refrigerant circulation loop.

[0035] The input end of the oil separator 50 is connected to the output end of the compressor 10, so that the gas discharged from the compressor 10 can enter the oil separator. The top of the oil separator 50 is connected to an exhaust pipeline, and the output end of the exhaust pipeline is connected to the condenser 20. The bottom of the oil separator is connected to an oil drain pipe, which is used to discharge the lubricating oil at the bottom of the oil separator 50.

[0036] The first input end of the oil cooler 90 is connected to the output end of the oil drain pipe, and the first output port of the oil cooler 90 is connected to the compressor 10, which can spray the lubricating oil cooled in the oil cooler 90 into the compressor 10 to achieve lubrication of the compressor 10.

[0037] The siphon tank 80 adopts the siphon tank 80 commonly used in the prior art, which will not be described in detail here because it is the prior art. The siphon tank 80 is provided with a cooling assembly, which can guide the liquid refrigerant in the siphon tank 80 to the second input end of the oil cooler 90. After the liquid refrigerant cools the high-temperature lubricating oil in the separator, the liquid refrigerant undergoes a phase change, and is converted from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant returns to the siphon tank 80 through the second output port of the separator. Thus, the siphon tank 80 cools the high-temperature lubricating oil in the oil cooler 90.

[0038] The siphon tank 80 is also provided with a liquid replenishing assembly, which is used to generate negative pressure inside the siphon tank 80 when the liquid refrigerant in the siphon tank 80 is lower than a preset value, thereby sucking the liquid refrigerant in the refrigerant circulation loop into the siphon tank 80 to complete the replenishment of the liquid refrigerant. The liquid replenishing assembly and the cooling assembly work asynchronously.

[0039] By adopting the above technical scheme, a cooling component and a refilling component are arranged on the siphon tank 80. The cooling component is used to cool the high-temperature lubricating oil in the oil cooler 90, and the refilling component is used to replenish the liquid refrigerant in the siphon tank 80 when the liquid refrigerant in the siphon tank 80 is lower than a preset value. Since it is completed in the form of negative pressure, the siphon tank 80 can be installed at any height relative to the condenser 20, so that the siphon tank 80 is in the refrigerant circulation loop, avoiding the influence of the installation height on the siphon tank 80, and the structure is simple and easy to implement.

[0040] In one embodiment of the present application, the fluid replenishment component includes:

[0041] A first tube 71, one end of which is connected to the air inlet of the compressor 10 in the refrigerant circulation loop, and the other end of which is connected to the top of the siphon tank 80, for generating negative pressure in the siphon tank 80; and

[0042] The second tube body 72 has one end connected to the bottom of the siphon tank 80 and the other end connected to the liquid outlet of the condenser 20 in the refrigerant circulation loop, and is used to absorb the liquid refrigerant discharged from the liquid outlet of the condenser 20 .

[0043] Specifically, the fluid replenishing assembly includes: a first tube body 71 and a second tube body 72 .

[0044] The first tube body 71 is made of metal material, such as aluminum alloy material, alloy steel material, etc. The first tube body 71 made of metal material has the advantages of strong support ability, wear resistance, corrosion resistance, good heat conduction effect, etc. The material used by the second tube body 72 is the same as that used by the first tube body 71, and has the same advantages, which will not be repeated here.

[0045] One end of the first tube body 71 is connected to the air inlet of the compressor 10 in the refrigerant circulation loop. Since the flow rate of the air inlet of the compressor 10 is relatively high, the end of the first tube body 71 connected to the air inlet of the compressor 10 is in a negative pressure state. The other end of the first tube body 71 is connected to the top of the siphon tank 80.

[0046] The first tube body 71 is connected to the air inlet of the compressor 10 in a fixed connection manner, such as welding, etc. The first tube body 71 is connected to the air inlet of the compressor 10 in a fixed connection manner, which can improve the strength of the connection between the first tube body 71 and the air inlet of the compressor 10, and improve the stability of the first tube body 71 during operation. Of course, according to design requirements, the first tube body 71 and the air inlet of the compressor 10 can also be connected in a detachable manner, such as screw connection, bolt connection, etc. The first tube body 71 is connected to the air inlet of the compressor 10 in a detachable manner, which can facilitate the installation and disassembly of the first tube body 71 and facilitate subsequent maintenance.

[0047] The first tube body 71 and the siphon tank 80 are connected in a fixed connection manner, such as welding, etc. The first tube body 71 and the siphon tank 80 are connected in a fixed connection manner, which can improve the connection strength between the first tube body 71 and the siphon tank 80 and improve the stability of the first tube body 71 during operation. Of course, according to the design requirements, the first tube body 71 and the siphon tank 80 can also be connected in a detachable manner, such as screw connection, bolt connection, etc. The first tube body 71 and the siphon tank 80 are connected in a detachable manner, which can facilitate the installation and disassembly of the first tube body 71 and facilitate subsequent maintenance.

[0048] One end of the second tube body 72 is connected to the bottom of the siphon tank 80 , and the other end of the second tube body 72 is connected to the liquid outlet of the condenser 20 in the refrigerant circulation loop, so as to absorb the liquid refrigerant discharged from the liquid outlet of the condenser 20 .

[0049] The connection method between the second tube body 72 and the siphon tank 80 is the same as the connection method between the first tube body 71 and the siphon tank 80 , and has the same advantages, which will not be described in detail here.

[0050] The connection method between the second tube body 72 and the liquid outlet of the condenser 20 in the refrigerant circulation loop is the same as the connection method between the second tube body 72 and the siphon tank 80, and has the same advantages, which will not be repeated here.

[0051] Its working principle is that, since one end of the second tube body 72 is connected to the air inlet of the compressor 10, and since the air pressure at the air inlet of the compressor 10 is relatively low, a negative pressure environment will be formed in the second tube body 72, and the siphon tank 80 will also be in a negative pressure environment. At this time, one end of the second tube body 72 is connected to the liquid outlet of the condenser 20 in the refrigerant circulation loop, and the negative pressure in the siphon tank 80 will suck the liquid refrigerant at the liquid outlet of the condenser 20 into the siphon tank 80, thereby replenishing the liquid refrigerant in the siphon tank 80. The siphon tank 80 is freed from the limitation of the installation height, has a simple structure, and is easy to implement.

[0052] In one embodiment of the present application, a check valve 74 is disposed on the second tube body 72 .

[0053] Specifically, a check valve 74 is provided on the second tube body 72, and the check valve 74 is provided to prevent the liquid refrigerant in the siphon tank 80 from flowing into the liquid outlet of the condenser 20. The liquid refrigerant in the siphon tank 80 is ensured to be stable, and the structure is simple and easy to implement.

[0054] In one embodiment of the present application, a first electromagnetic valve 73 capable of opening or closing the first tube body 71 is disposed on the first tube body 71 .

[0055] Specifically, the first tube body 71 is provided with a first electromagnetic valve 73 which can open or close the first tube body 71 . The opening or closing of the first electromagnetic valve 73 is used to open or close the liquid replenishing component. The structure is simple and easy to implement.

[0056] In one embodiment of the present application, the cooling assembly comprises:

[0057] A third tube 102, one end of which is connected to the siphon tank 80, and the other end of which is connected to the oil cooler 90, for introducing the liquid refrigerant in the siphon tank 80 into the oil cooler 90; and

[0058] The fourth tube body 101 has one end connected to the oil cooler 90 and the other end connected to the siphon tank 80 , and is used to introduce the gaseous refrigerant generated after heat exchange into the siphon tank 80 .

[0059] Specifically, the cooling assembly includes a third tube body 102 and a fourth tube body 101. One end of the third tube body 102 is connected to the siphon tank 80, and the other end of the third tube body 102 is connected to the oil cooler 90. The third tube body 102 is used to introduce the liquid refrigerant in the siphon tank 80 into the oil cooler 90, so that the liquid refrigerant exchanges heat with the high-temperature lubricating oil in the oil cooler 90, thereby cooling the high-temperature lubricating oil in the oil cooler 90.

[0060] One end of the fourth tube body 101 is connected to the oil cooler 90 , and the other end of the fourth tube body 101 is connected to the siphon tank 80 . The gaseous refrigerant in the oil cooler 90 is led out to the siphon tank 80 through the fourth tube body 101 , thereby realizing a cooling cycle.

[0061] The above technical solution has a simple structure and is easy to implement.

[0062] In one embodiment of the present application, the cooling assembly further includes:

[0063] The fifth tube body 103 has one end connected to the top of the siphon tank 80 and the other end connected to the air inlet of the condenser 20 , and is used to discharge the gaseous refrigerant in the siphon tank 80 to balance the pressure in the siphon tank 80 .

[0064] Specifically, one end of the fifth tube 103 is connected to the top of the siphon tank 80, and the other end of the fifth tube 103 is connected to the air inlet of the condenser 20. The fifth tube 103 is used to discharge the gaseous refrigerant in the siphon tank 80 to the air inlet of the condenser 20, so as to realize the condensation of the gaseous refrigerant in the siphon tank 80 and facilitate the pressure balance in the siphon tank 80. The structure is simple and easy to implement.

[0065] In one embodiment of the present application, a second electromagnetic valve 104 for opening or closing the fifth tube 103 is disposed on the fifth tube 103 .

[0066] Specifically, the fifth tube body 103 is provided with a second electromagnetic valve 104 for opening or closing the fifth tube body 103, and the cooling component is opened or closed by opening or closing the fifth tube body 103 through the second electromagnetic valve 104. The structure is simple and easy to implement. It is conceivable that the second electromagnetic valve 104 and the first electromagnetic valve 73 are not opened or closed at the same time.

[0067] In one embodiment of the present application, at least two liquid level sensors are also provided in the siphon tank 80;

[0068] When there are two liquid level sensors, they are a first liquid level sensor 120 and a second liquid level sensor 110.

[0069] When the liquid level in the siphon tank 80 is lower than the first liquid level sensor 120, the first electromagnetic valve 73 is opened and the second electromagnetic valve 104 is closed;

[0070] When the liquid level in the siphon tank 80 is greater than the second liquid level sensor 110 , the first electromagnetic valve 73 is closed and the second electromagnetic valve 104 is opened.

[0071] Specifically, at least two liquid level sensors are also provided in the siphon tank 80. When there are two liquid level sensors, they are the first liquid level sensor 120 and the second liquid level sensor 110. When the liquid level in the siphon tank 80 is lower than the first liquid level sensor 120, it indicates that the current liquid level in the siphon tank 80 is relatively low. At this time, the first electronic valve is opened to make the siphon tank 80 in a negative pressure state. The negative pressure state will make the liquid refrigerant at the outlet of the condenser 20 enter the siphon tank 80, so as to replenish the liquid refrigerant in the siphon tank 80. When the height of the liquid refrigerant is greater than the second liquid level sensor 110, it indicates that the height of the current liquid refrigerant has met the preset conditions. At this time, the first electromagnetic valve 73 is closed to suspend the replenishment of the liquid refrigerant in the siphon tank 80, and the second electromagnetic valve 104 is opened at the same time to achieve the balance of the pressure in the siphon tank 80, so as to facilitate the discharge of the gaseous refrigerant in the siphon tank 80. The structure is simple and easy to implement.

[0072] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An oil cooling system, comprising a refrigerant circulation loop with an oil separator and an oil cooler, the refrigerant circulation loop comprising: A condenser, an evaporator, a throttling element, and a compressor, wherein the output end of the compressor is connected to the oil separator and the condenser in sequence, the output end of the condenser is connected to the throttling element, the output end of the throttling element is connected to the evaporator, and the output end of the evaporator is connected to the input end of the compressor; it is characterized in that it also includes a siphon tank, on which a cooling component for cooling the oil cooler is provided; and a liquid replenishing component that generates negative pressure in the siphon tank when the liquid refrigerant in the siphon tank is lower than a preset value, so as to draw liquid refrigerant from the refrigerant circulation loop to replenish it in the siphon tank, and the liquid replenishing component and the cooling component work asynchronously; The fluid replenishment component comprises: A first tube body, one end of which is connected to the air inlet of the compressor in the refrigerant circulation loop, and the other end of which is connected to the top of the siphon tank, for generating negative pressure in the siphon tank; and The second tube body has one end connected to the bottom of the siphon tank and the other end connected to the liquid outlet of the condenser in the refrigerant circulation loop, and is used to absorb the liquid refrigerant discharged from the liquid outlet of the condenser.

2. The oil cooling system according to claim 1, characterized in that: The second pipe body is provided with a check valve.

3. The oil cooling system according to claim 1, characterized in that: The first tube body is provided with a first electromagnetic valve which can open or close the first tube body.

4. The oil cooling system according to claim 2, characterized in that: The cooling assembly comprises: A third pipe body, one end of which is connected to the siphon tank and the other end of which is connected to the oil cooler, and is used to introduce the liquid refrigerant in the siphon tank into the oil cooler; and The fourth pipe body has one end connected to the oil cooler and the other end connected to the siphon tank, and is used to introduce the gaseous refrigerant generated after heat exchange into the siphon tank.

5. The oil cooling system according to any one of claims 1 to 2, characterized in that: The cooling assembly also includes: The fifth tube body has one end connected to the top of the siphon tank and the other end connected to the air inlet of the condenser, and is used to discharge the gaseous refrigerant in the siphon tank to balance the pressure in the siphon tank.

6. The oil cooling system according to claim 5, characterized in that The fifth tube is provided with a second electromagnetic valve for opening or closing the fifth tube.

7. The oil cooling system according to claim 6, characterized in that At least two liquid level sensors are also provided in the siphon tank; When there are two liquid level sensors, they are a first liquid level sensor and a second liquid level sensor. When the liquid level in the siphon tank is lower than the first liquid level sensor, the first electromagnetic valve is opened and the second electromagnetic valve is closed; When the liquid level in the siphon tank is greater than the second liquid level sensor, the first electromagnetic valve is closed and the second electromagnetic valve is opened.

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