System for reducing starting abrasion of gas lubrication linear compressor

Abstract

The invention relates to the technical field of compressors, and provides a system for reducing starting abrasion of a gas lubrication linear compressor, the system comprises a circulation loop, a compressor, an evaporator, an electronic expansion valve and a condenser, the compressor, the evaporator, the electronic expansion valve and the condenser are all arranged in the circulation loop, and the compressor is provided with a gas bearing; a control valve is arranged between the compressor and the condenser, and the control valve can introduce high-pressure gas stored in the condenser into the gas bearing to provide initial lubrication when the compressor is started; or, the compressor further comprises a gas release device, the exhaust port of the compressor is connected with the gas release device, the gas release device is connected with the gas bearing, the gas release device comprises a gas storage container, and a gas adsorption material is arranged in the gas storage container. The system for reducing starting abrasion of the gas lubrication linear compressor is used for overcoming the defect that in the prior art, abrasion exists in the starting stage of the gas lubrication linear compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a system for reducing starting wear of a gas-lubricated linear compressor. Background Art

[0002] Compressors are widely used in many fields, such as air conditioners, refrigeration, industrial manufacturing, etc. As an important type among them, gas-lubricated linear compressors are well-known for their high efficiency and reliability.

[0003] Traditional gas-lubricated linear compressors often face the problem of insufficient gas lubrication during startup in the startup stage, resulting in starting wear. This starting wear may affect the equipment life, increase the maintenance cost, and reduce the performance. In the prior art, some improved compressors attempt to solve the starting wear problem by adjusting the lubrication system or adding auxiliary devices, but the above measures have poor effectiveness and cannot be generally applicable.

[0004] Therefore, there is an urgent need for a system for reducing starting wear of a gas-lubricated linear compressor to solve the wear problem of the gas-lubricated linear compressor in the startup stage. Summary of the Invention

[0005] The present invention provides a system for reducing starting wear of a gas-lubricated linear compressor to solve the defect of wear existing in the gas-lubricated linear compressor in the startup stage in the prior art.

[0006] The present invention provides a system for reducing starting wear of a gas-lubricated linear compressor, including: a circulation loop, a compressor, an evaporator, an electronic expansion valve, and a condenser. The compressor, the evaporator, the electronic expansion valve, and the condenser are all arranged in the circulation loop, and the compressor has a gas bearing.

[0007] A control valve is arranged between the compressor and the condenser, and the control valve can introduce the high-pressure gas stored in the condenser into the gas bearing when the compressor starts to provide initial lubrication.

[0008] Alternatively, it further includes a gas release device. The exhaust port of the compressor is connected to the gas release device, and the gas release device is connected to the gas bearing. The gas release device includes a gas storage container, and a gas adsorption material is arranged in the gas storage container.

[0009] According to the system for reducing starting wear of a gas-lubricated linear compressor provided by the present invention, it further includes a temperature adjustment device. The temperature adjustment device is arranged on the gas storage container, and the temperature adjustment device is used to adjust the temperature in the gas storage container.

[0010] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the adsorption material is disposed on the inner wall of the gas storage container.

[0011] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the temperature regulating device is an electric heating wire, and the electric heating wire is embedded in the adsorption material.

[0012] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the container wall of the gas storage container is provided with a sandwich space, and the temperature regulating device is disposed in the sandwich space.

[0013] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the temperature regulating device is a heating bracket, the heating bracket is disposed in the gas storage container, and the gas adsorption material is attached to the heating bracket.

[0014] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein a one-way valve for restricting the one-way flow of gas is provided between the exhaust port of the compressor and the intake port of the gas storage container.

[0015] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the gas release device is disposed in the housing of the compressor.

[0016] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, wherein the adsorption material includes an adsorption material applicable to hydrofluorocarbons, ammonia, carbon dioxide, hydrocarbons, HFOs, water vapor or air.

[0017] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention further includes a tee joint, wherein the exhaust port of the compressor is connected to the first joint of the tee joint, and the intake port of the gas storage container is connected to the second joint of the tee joint.

[0018] The system for reducing starting wear of a gas-lubricated linear compressor provided by the present invention:

[0019] Solution 1: When the system is shut down, first close the electronic expansion valve, and then close the compressor and the control valve so that a part of the high-pressure gas is stored in the condenser; when the compressor needs to be restarted, first open the control valve to release the high-pressure gas stored in the condenser to provide initial lubrication for the gas bearing, and then start the compressor and open the electronic expansion valve to make the system resume normal operation, which can eliminate the wear problem existing in the starting stage of the gas-lubricated linear compressor.

[0020] Solution 2: When the compressor starts, the gas stored in the adsorption material can be released by heating or conducting electricity, etc., to provide initial lubrication for the gas bearings of the compressor; after the compressor operates normally, the gas release device is closed, and the adsorption material is no longer heated or conducted electricity, so that the adsorption material adsorbs gas again and returns to the storage state, preparing for gas storage before the next start. By using the adsorption material to release the stored gas, an efficient lubrication solution before the compressor starts is provided, reducing the frictional loss during startup. Moreover, the system also has an automatic switching function, which makes a smooth and effective switch between the startup and normal operation stages of the compressor, ensuring the stability of the system operation.

[0021] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of Embodiment 1 of the system for reducing startup wear of a gas-lubricated linear compressor provided by the present invention;

[0024] Figure 2 It is one of the schematic diagrams of Embodiment 2 of the system for reducing startup wear of a gas-lubricated linear compressor provided by the present invention;

[0025] Figure 3 It is the second schematic diagram of Embodiment 2 of the system for reducing startup wear of a gas-lubricated linear compressor provided by the present invention;

[0026] Figure 4 It is the schematic diagram of the gas flow direction of the system for reducing startup wear of a gas-lubricated linear compressor provided by the present invention.

[0027] Reference Signs:

[0028] 1. Compressor; 2. Evaporator; 3. Electronic expansion valve; 4. Condenser; 5. Solenoid valve; 6. Gas release device; 7. Porous medium; 8. Piston chamber; 9. Piston; 10. Exhaust valve; 11. Check valve; 12. Three-way joint; 13. On-off valve. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the scope of protection of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0031] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art can combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0032] The following Figures 1 to 4 describes a system for reducing starting wear of a gas lubricated linear compressor provided by the present invention.

[0033] As Figure 1 shown, Embodiment 1 of the present invention provides a system for reducing starting wear of a gas lubricated linear compressor, including: a circulation loop, a compressor 1, an evaporator 2, an electronic expansion valve 3, and a condenser 4. The compressor 1, the evaporator 2, the electronic expansion valve 3, and the condenser 4 are all arranged in the circulation loop, and the compressor 1 has a gas bearing;

[0034] A control valve is provided between the compressor 1 and the condenser 4, and the control valve can introduce the high-pressure gas stored in the condenser 4 into the gas bearing to provide initial lubrication when the compressor 1 starts.

[0035] Specifically, in this embodiment, the control valve is a solenoid valve 5 for controlling the gas flow.

[0036] As Figure 1As shown, in this embodiment, an on-off valve 13 is provided between the electronic expansion valve 3 and the condenser 4 to prevent the increase in energy consumption and unstable system operation caused by the electronic expansion valve 3 not being closed tightly.

[0037] System shutdown process: First, close the electronic expansion valve 3, then close the compressor 1 and the solenoid valve 5, so that some high-pressure gas is stored in the condenser 4 to provide initial lubrication for the gas bearing of the compressor 1 when it starts.

[0038] System startup process: When it is necessary to restart the compressor 1, first open the solenoid valve 5 to introduce the high-pressure gas stored in the condenser 4 into the gas bearing of the compressor 1 to provide it with initial lubrication, then start the compressor 1 and open the electronic expansion valve 3 to restore the system to normal operation.

[0039] The system for reducing the startup wear of a gas-lubricated linear compressor provided in this embodiment only adds an electromagnetic valve 5 in the circulation loop. The electromagnetic valve 5 controls the gas medium in the circulation loop to be temporarily stored in the condenser 4. When the compressor 1 starts, the high-pressure gas stored in the condenser 4 is released to provide initial lubrication for the gas bearing of the compressor 1. The system has a simple structure and is easy to control.

[0040] The present application provides an effective lubrication mechanism, reduces friction and wear during startup of the compressor 1, optimizes the startup process of the refrigeration system, reduces energy loss during startup, and improves the overall efficiency of the system.

[0041] like Figure 2 As shown, embodiment 2 of the present invention provides a system for reducing startup wear of a gas-lubricated linear compressor, comprising: a circulation loop, a compressor 1, an evaporator 2, an electronic expansion valve 3, and a condenser 4. The compressor 1, the evaporator 2, the electronic expansion valve 3, and the condenser 4 are all arranged in the circulation loop, and the compressor 1 has a gas bearing;

[0042] It also includes a gas release device 6. The exhaust port of the compressor 1 is connected to the gas release device 6. The gas release device 6 is connected to the gas bearing. The gas release device 6 includes a gas storage container. The gas storage container is provided with gas adsorption material.

[0043] Specifically, in this embodiment, the gas bearing of compressor 1 includes a piston chamber 8 surrounded by a porous medium 7, a piston 9 disposed within piston chamber 8, and an exhaust valve 10 disposed at the exhaust end of piston chamber 8. During intake, gas evenly enters piston chamber 8 through porous medium 7, forming a gas film on different parts of piston 9, thereby providing gas lubrication for piston 9.

[0044] Gas release process: The gas stored in the adsorption material is released by heating or conducting electricity, etc., to provide initial lubrication for the gas bearing of the compressor 1.

[0045] System operation mode conversion: After the compressor 1 operates normally, the gas release system is closed, and no longer heats or conducts electricity, so that the adsorption material returns to the storage state again, preparing for gas storage before the next startup.

[0046] In the embodiments of the present invention, the adsorption material includes adsorption materials applicable to hydrofluorocarbons (such as R-134a, R-404A, R-410A, etc.), ammonia, carbon dioxide, hydrocarbons (such as R-290, R-600a, etc.), HFOs (hydrofluoroolefins, such as 1234yf, 1234ze, etc.), water vapor or air. It should be noted that the corresponding adsorption material can be selected according to the type of refrigerant in the system to ensure efficient and stable gas adsorption and release in the gas release device 6.

[0047] For example, for common refrigerants such as R134a, R600a, etc., adsorption materials such as activated carbon, zeolite, MOF (Metal Organic Framework), etc. are usually used. These materials have different adsorption properties and application ranges, and the most suitable adsorption material can be selected according to the characteristics of specific refrigerants.

[0048] When carbon dioxide is used as the refrigerant, due to the development of carbon dioxide capture projects such as CCUS (Carbon Capture, Utilization and Storage), there are many adsorption and desorption materials for carbon dioxide. For example, the carbon dioxide adsorption effect of PEI-K2CO3 / AC is the best, up to 3.6 mmol / g. The experimental results show that only 200 g of adsorption material is required to achieve this function.

[0049] For new refrigerants, such as R1234yf and R290, their characteristics are different from those of traditional refrigerants. Therefore, it may be necessary to select suitable adsorption materials according to their molecular structures and characteristics. More advanced adsorption materials, such as new types of MOF, graphene oxide, etc., may be explored to more effectively adsorb and store these new refrigerant gases.

[0050] The system for reducing starting wear of a gas-lubricated linear compressor according to the present invention further includes a temperature regulating device disposed in the gas storage container, and the temperature regulating device is used to regulate the temperature in the gas storage container. By providing the temperature regulating device, the temperature in the gas storage container can be regulated. Since there are significant differences in the gas adsorption capacity of the adsorption material at different temperatures, when the gas bearing of the compressor 1 requires initial lubrication, the adsorption material in the gas storage container can be heated by the temperature regulating device to release the internally adsorbed gas, which then enters the gas bearing of the compressor 1 for initial lubrication. After the initial lubrication is completed, the adsorption material can be allowed to cool down on its own. After cooling down to the set temperature, the adsorption material can re-adsorb a set amount of gas to lubricate the gas bearing of the compressor 1 before its next start. Of course, the adsorption material can also be quickly cooled down to the set temperature by the temperature regulating device to re-adsorb a sufficient amount of gas for the next use.

[0051] According to some embodiments provided by the present invention, the adsorption material is disposed on the inner wall of the gas storage container. Specifically, the adsorption material can be made into a plate shape and fixed to the inner wall of the gas storage container by means such as bonding or connecting with threaded parts. When a part of the gas discharged from the exhaust port of the compressor 1 enters the gas storage container, the adsorption material disposed on the inner wall of the gas storage container can adsorb and store the gas for initial lubrication of the gas bearing of the compressor 1.

[0052] Specifically, for the system for reducing starting wear of a gas-lubricated linear compressor according to the present invention, the temperature regulating device is an electric heating wire embedded in the adsorption material. The electric heating wire has a simple structure and occupies a small volume. Moreover, since the electric heating wire is embedded in the adsorption material, the contact area with the adsorption material can be increased, the rate of temperature rise of the adsorption material can be increased, and thus the response speed of the gas release device 6 can be improved.

[0053] It should be noted that the opening or closing of the electric heating wire can be automatically controlled through a preset program, thereby controlling the gas release timing of the gas release device 6.

[0054] According to some embodiments provided by the present invention, the container wall of the gas storage container is provided with an interlayer space, and the temperature regulating device is disposed in the interlayer space. The temperature regulating device located in the interlayer space can perform non-direct contact heat exchange on the adsorption material to prevent damage to the adsorption material itself caused by excessive local temperature of a specific adsorption material.

[0055] According to some embodiments provided by the present invention, the temperature regulating device can be a heating bracket, which is arranged inside the gas storage container, and the gas adsorption material is attached to the heating bracket. Specifically, the heating bracket can be arranged in a crisscross mesh structure, serving as a carrier for the adsorption material, and capable of arranging a sufficient amount of adsorption material in a relatively small space. Since there is a need for correspondence between the adsorption material and the refrigerant, when the adsorption capacity of the adsorption material corresponding to the refrigerant is weak, more adsorption material needs to be arranged in the gas storage container to meet the gas adsorption requirement. At this time, the influence of the volume of the adsorption material on the overall occupied space of the gas release device 6 needs to be considered. In this embodiment, by setting the temperature regulating device as a heating bracket, serving as a carrier for the adsorption material, and attaching the adsorption material to the heating bracket, the space occupied by the adsorption material can be reduced, and the adsorption material can be fully heated by the heating bracket.

[0056] As Figure 2 shown, according to the system for reducing starting wear of a gas lubricated linear compressor provided by the present invention, a one-way valve 11 for restricting the unidirectional flow of gas is provided between the exhaust port of the compressor 1 and the intake port of the gas storage container. When a part of the gas discharged from the exhaust port of the compressor 1 enters the gas storage container, the one-way valve 11 can prevent the gas from flowing back.

[0057] As Figure 2 shown, according to the system for reducing starting wear of a gas lubricated linear compressor provided by the present invention, the gas release device 6 is arranged inside the housing of the compressor 1. The gas release device 6 can be integrated inside the housing of the compressor 1, increasing the compactness of the system and reducing the space occupied by the system.

[0058] As Figure 3 shown, according to some embodiments provided by the present invention, when the internal space of the housing of the compressor 1 cannot meet the installation requirements, the gas release device 6 can also be an independent component arranged outside the housing of the compressor 1.

[0059] As Figure 2 shown, according to the system for reducing starting wear of a gas lubricated linear compressor 1 provided by the present invention, it further includes a three-way joint 12. The exhaust port of the compressor 1 is connected to the first joint of the three-way joint 12, and the intake port of the gas storage container is connected to the second joint of the three-way joint 12. By providing the three-way joint 12, a part of the gas discharged from the compressor 1 can be introduced into the gas storage container and absorbed by the adsorption material for use when the compressor 1 starts up next time.

[0060] As Figure 4As shown, when the system for reducing starting wear of a gas lubricated linear compressor provided by the present invention starts, the gas stored in the condenser 4 or released by the gas release device 6 enters the compressor 1 under the flow equalizing effect of the porous medium 7, and a lubricating gas film is formed around the piston 9 to lubricate the piston 9.

[0061] From the description of the above embodiments, it can be seen that the system for reducing starting wear of a gas lubricated linear compressor provided by the present invention has at least the following advantages:

[0062] By adding a solenoid valve 5 in the system to store the exhaust gas after the compressor 1 stops and provide sufficient initial lubrication during the next start-up, and only adding a solenoid valve 5 in the circulation loop, controlling the gas medium in the circulation loop to be temporarily stored in the condenser 4 through the solenoid valve 5. When the compressor 1 starts, by releasing the high-pressure gas stored in the condenser 4, initial lubrication can be provided for the gas bearings of the compressor 1, with a simple structure and convenient control.

[0063] By adding a gas release device 6, the gas bearings of the compressor 1 can be initially lubricated by releasing the gas stored in the adsorption material, without the need to additionally add other complex components in the refrigeration system, and it has strong versatility.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A system for reducing starting wear of a gas lubricated linear compressor, characterized in that, Comprising: A circulation loop, a compressor, an evaporator, an electronic expansion valve and a condenser, wherein the compressor, the evaporator, the electronic expansion valve and the condenser are all arranged in the circulation loop, and the compressor has a gas bearing; A control valve is provided between the compressor and the condenser, and the control valve can introduce the high-pressure gas stored in the condenser into the gas bearing when the compressor starts to provide initial lubrication; Alternatively, it further includes a gas release device. The exhaust port of the compressor is connected to the gas release device, and the gas release device is connected to the gas bearing. The gas release device includes a gas storage container, and a gas adsorption material is provided in the gas storage container.

2. The system for reducing starting wear of a gas lubricated linear compressor according to claim 1, wherein It further includes a temperature adjustment device, and the temperature adjustment device is arranged in the gas storage container for adjusting the temperature in the gas storage container.

3. The system for reducing starting wear of a gas lubricated linear compressor according to claim 2, wherein The adsorption material is arranged on the inner wall of the gas storage container.

4. The system for reducing starting wear of a gas lubricated linear compressor according to claim 3, characterized in that The temperature adjustment device is an electric heating wire, and the electric heating wire is embedded in the adsorption material.

5. The system for reducing starting wear of a gas lubricated linear compressor according to claim 2, wherein A sandwich space is provided on the container wall of the gas storage container, and the temperature adjustment device is arranged in the sandwich space.

6. The system for reducing starting wear of a gas lubricated linear compressor according to claim 2, wherein The temperature adjustment device is a heating bracket, and the heating bracket is arranged in the gas storage container, and the gas adsorption material is attached to the heating bracket.

7. The system for reducing starting wear of a gas lubricated linear compressor according to any one of claims 1 to 6, characterized in that, A one-way valve for restricting the one-way flow of gas is provided between the exhaust port of the compressor and the intake port of the gas storage container.

8. The system for reducing starting wear of a gas lubricated linear compressor according to any one of claims 1 to 6, characterized in that The gas release device is arranged in the housing of the compressor.

9. The system for reducing starting wear of a gas lubricated linear compressor according to any one of claims 1 to 6, characterized in that, The adsorption material includes an adsorption material applicable to hydrofluorocarbons, ammonia, carbon dioxide, hydrocarbons, HFOs, water vapor or air.

10. The system for reducing starting wear of a gas lubricated linear compressor according to any one of claims 1 to 6, characterized in that, It further includes a three-way joint. The exhaust port of the compressor is connected to the first joint of the three-way joint, and the intake port of the gas storage container is connected to the second joint of the three-way joint.

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