Oil return method, device, oil return equipment and storage medium for compressor

Abstract

The present application relates to the technical field of oil-injected compressors, and discloses an oil return method, device, oil return equipment and storage medium for a compressor, wherein the method comprises: obtaining measurement data of the liquid level meter provided in the automatic oil return device; opening the solenoid valve based on the measurement data, wherein the liquid phase oil inside the automatic oil return device sequentially enters into the compressor main engine through the solenoid valve, the process shut-off valve, the regulating valve and the atomizing nozzle, and the liquid phase oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe from the liquid phase oil in the internal volume of the filter element cylinder body separated from the oil and gas, thereby avoiding the reduction of volumetric efficiency caused by the high and low pressure short circuit of the gas during the oil return process, avoiding the impact and oscillation of the intermittent oil return on the intake and exhaust pressures of the compressor, and also avoiding the occurrence of oil pollution accidents in the downstream exhaust pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-injected compressors, and in particular to an oil return method, an oil return device, an oil return equipment and a storage medium for a compressor. Background Art

[0002] Screw compressors can take advantage of the advantages of reciprocating (piston) compressors and centrifugal compressors, with the advantages of fewer parts and a long maintenance-free cycle. They are a common general-purpose machine used in industry. In order to improve the thermal efficiency of the compressor, oil injection is used to reduce the compression heat, making the entire compression process closer to an isothermal process, because isothermal compression is an ideal process with the highest thermal efficiency.

[0003] During the use of compressors, including air compressors and refrigerant compressors, it is generally required that the oil content in the compressor exhaust be controlled within 10ppmW, so as not to cause oil pollution to the working fluid. Therefore, according to the control level of the oil content, one or more oil separation methods are generally used to achieve cleanliness. For more than 99% of the crudely separated liquid oil, it flows directly back to the oil injection port of the compressor through the pressure difference or oil pump for recycling. However, for oil with a mass content of less than 1%, only a filter element composed of fiber materials can be used for filtration, and the filtered oil is mainly returned directly to the suction end of the compressor through the pressure difference. A similar solution is to directly short-circuit bypass between high and low pressures to ensure the smooth flow of oil return, but the bypass loses about 1-5% of the volume flow rate almost most of the time, resulting in a decrease in the volumetric efficiency of the compressor. There is also a program gap oil return, which causes fluctuations in the intake and exhaust pressures of the compressor (the fluctuation amplitude generally accounts for 10% of the pressure) due to the lack of control over the return oil and return air, and the compressor cannot work normally or cannot be allowed to be used normally. Summary of the invention

[0004] Based on this, it is necessary to address the technical problem of reduced volumetric efficiency of the compressor during the oil return process in the prior art, and propose an oil return method, device, oil return equipment and storage medium for the compressor.

[0005] In a first aspect, a method for returning oil to a compressor is provided, which is characterized in that it is applied to an oil return device, wherein the oil return device comprises a coaxial siphon oil return pipe, a primary oil separation filter element, a filter element cylinder, a primary cyclone oil separator, an automatic oil return device, a liquid level gauge, a solenoid valve, a process shut-off valve, a regulating valve, an atomizing nozzle, and a compressor main unit; the coaxial siphon oil return pipe comprises a central channel and a coaxial outer tube, the central channel is arranged on the central axis of the coaxial outer tube, the exhaust end of the compressor main unit is connected to the air inlet end of the primary cyclone oil separator, the filter element cylinder is arranged inside the primary cyclone oil separator, the filter element cylinder is provided with a primary oil separation filter element, the coaxial siphon The central channel of the oil return pipe and one end of the coaxial outer tube are both arranged at the bottom of the filter element cylinder, the other end of the central channel of the coaxial siphon oil return pipe is arranged at the bottom of the automatic oil return device, the other end of the coaxial outer tube of the coaxial siphon oil return pipe is arranged in the outer area close to the automatic oil return device, the automatic oil return device is provided with the liquid level gauge, the oil discharge end of the automatic oil return device is connected to the inlet end of the solenoid valve, the outlet end of the solenoid valve is connected to the inlet end of the process stop valve, the outlet end of the process stop valve is connected to one end of the regulating valve, the other end of the regulating valve is connected to one end of the atomizing nozzle, and the spraying end of the atomizing nozzle is connected to the inlet end of the compressor host;

[0006] The oil return method comprises:

[0007] Acquiring measurement data of the liquid level meter provided in the automatic oil return device;

[0008] Based on the measurement data, the solenoid valve is opened, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to discharge the liquid oil in the internal cavity of the filter element cylinder for oil and gas separation.

[0009] In a second aspect, an oil return device is provided, the device comprising:

[0010] An acquisition module, used for acquiring measurement data of the liquid level meter provided in the automatic oil return device;

[0011] The switch module is used to open the solenoid valve based on the measurement data, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to separate the liquid oil in the internal cavity of the filter element cylinder from oil and gas.

[0012] In a third aspect, an oil return device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned oil return method when executing the computer program.

[0013] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned oil return method are implemented.

[0014] The oil return method of the compressor proposed in the present invention is applied to the oil return equipment, wherein the oil return equipment comprises a coaxial siphon oil return pipe, a primary oil separation filter element, a filter element cylinder, a primary cyclone oil separator, an automatic oil return device, a liquid level gauge, a solenoid valve, a process shut-off valve, a regulating valve, an atomizing nozzle, and a compressor host. The coaxial siphon oil return pipe comprises a central channel and a coaxial outer tube, the central channel is arranged on the central axis of the coaxial outer tube, the exhaust end of the compressor host is connected with the air inlet end of the primary cyclone oil separator, the filter element cylinder is arranged inside the primary cyclone oil separator, the filter element cylinder is provided with a primary oil separation filter element, the central channel of the coaxial siphon oil return pipe and one end of the coaxial outer tube are both arranged at the bottom of the filter element cylinder, the other end of the central channel of the coaxial siphon oil return pipe is arranged at the bottom of the automatic oil return device, the other end of the coaxial outer tube of the coaxial siphon oil return pipe is arranged at the outer area close to the automatic oil return device, and the automatic oil return device is provided with the liquid level gauge, The oil discharge end of the automatic oil return device is connected to the inlet end of the solenoid valve, the outlet end of the solenoid valve is connected to the inlet end of the process stop valve, the outlet end of the process stop valve is connected to one end of the regulating valve, the other end of the regulating valve is connected to one end of the atomizing nozzle, and the spraying end of the atomizing nozzle is connected to the inlet end of the compressor host; the oil return method comprises: obtaining the measurement data of the liquid level meter provided in the automatic oil return device, and then opening the solenoid valve based on the measurement data, wherein the liquid phase oil inside the automatic oil return device sequentially passes through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle into the compressor host, and the liquid phase oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to separate the liquid phase oil in the internal cavity of the filter element cylinder from oil and gas, which can avoid the reduction of volumetric efficiency caused by the high and low pressure short circuit of the gas during the oil return process, and avoid the impact and oscillation of the intake and exhaust pressure of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] in:

[0017] Figure 1 is an application environment diagram of an oil return method in an embodiment;

[0018] Figure 2 is a flow chart of an oil return method in one embodiment;

[0019] Figure 3 is a structural block diagram of an oil return device in one embodiment;

[0020] Figure 4 1 is a structural block diagram of an oil return device in one embodiment. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The oil return method provided by the embodiment of the present invention can be applied in Figure 1 In an application environment, in one embodiment, Figure 1 The schematic diagram of the oil return equipment is shown in FIG. Figure 1 As shown, the oil return equipment includes a coaxial siphon oil return pipe 1, a primary oil separation filter element 2, a filter element cylinder, a primary cyclone oil separator 4, an automatic oil return device 5, a liquid level meter 6, a solenoid valve 7, a process shut-off valve 8, a regulating valve 9, an atomizing nozzle 10, and a compressor host 11. The coaxial siphon oil return pipe 1 includes a central channel and a coaxial outer tube, the central channel is arranged on the central axis of the coaxial outer tube, the exhaust end of the compressor host 11 is connected to the air inlet end of the primary cyclone oil separator 4, the filter element cylinder is arranged inside the primary cyclone oil separator 4, the filter element cylinder is provided with a primary oil separation filter element 2, the central channel of the coaxial siphon oil return pipe 1 and one end of the coaxial outer tube are both arranged at the bottom of the filter element cylinder, and the other end of the central channel of the coaxial siphon oil return pipe 1 is arranged at the automatic oil return device 5. 5, the other end of the coaxial outer tube of the coaxial siphon oil return pipe 1 is arranged in the outer area close to the automatic oil return device 5, the automatic oil return device 5 is provided with the liquid level meter 6, the oil discharge end of the automatic oil return device 5 is connected to the inlet end of the solenoid valve 7, the outlet end of the solenoid valve 7 is connected to the inlet end of the process stop valve 8, the outlet end of the process stop valve 8 is connected to one end of the regulating valve 9, the other end of the regulating valve 9 is connected to one end of the atomizing nozzle 10, and the spraying end of the atomizing nozzle 10 is connected to the inlet end of the compressor host 11.

[0025] In one implementation, the compressor main unit 11 increases the pressure of the "helium-oil mist" mixture to the set exhaust pressure and then discharges it. The oil-gas mixture enters the primary cyclone oil separator 4 along the tangential direction of the cylinder. The cyclone oil separator 4 is a vertical cylindrical container. The inner concentric filter cylinder forms a coaxial outer tube. The tangentially flowing airflow will form a vortex flow field. Due to the large density difference between gas and oil, the initial oil-gas separation will be achieved mainly under the physical mechanism of centrifugal force, that is, most of the oil droplets are thrown out, collide with the container wall and accumulate. This part of the main amount of oil is discharged from the primary cyclone oil separator 4 under the action of the pressure difference and then cooled and recycled. The oil-gas mixture is further separated from the primary oil separation filter 2 with higher efficiency by interception and filtration. The oil content after separation is usually 3mg / m 3, after the filtered clean helium is discharged from the oil separator 4, it provides power for the refrigeration cycle. The airflow direction flowing through the primary oil separation filter element 2 is outside-in and inside-out. The liquid oil condensed after filtering will accumulate in the internal volume of the filter element cylinder. If it is not removed in time, the filtering area of ​​the filter element will be reduced, causing the exhaust gas downstream to exceed the standard. In order to discharge this part of the oil at any time, a coaxial multi-channel coaxial siphon oil return pipe 1 is proposed, which can use the siphon effect to discharge the liquid oil from the filter element, enter the automatic oil return device 5 and be temporarily stored in the automatic oil return device. The central channel of the coaxial siphon oil return pipe 1 is the flow channel of the liquid oil, and the coaxial outer tube of the coaxial siphon oil return pipe 1 plays the role of gas pressure balance. The coaxial siphon oil return pipe uses the siphon effect to introduce the liquid oil in the primary oil separation of the compressor to the outside of the primary oil separator, thereby facilitating the monitoring and maintenance and replacement of the liquid level.

[0026] In one implementation, the passage between the central passage and the coaxial outer tube may be an annular passage.

[0027] See also Figure 2 As shown, Figure 2 A schematic flow chart of an oil return method provided in one embodiment of the present invention comprises the following steps:

[0028] Step S101: obtaining measurement data of the liquid level meter provided in the automatic oil return device;

[0029] Step S201: Based on the measurement data, the solenoid valve is opened, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process shut-off valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to separate the liquid oil in the internal cavity of the filter element cylinder for oil and gas separation.

[0030] In one embodiment, it is determined whether the measured data is greater than or equal to the preset oil discharge value; if so, the solenoid valve is controlled to open. As an example, the liquid phase oil in the automatic oil return device 5 is measured by the liquid level meter 6 to control the switch of the solenoid valve 7. When the liquid level is high, the solenoid valve 7 is opened, and the oil is sucked into the air intake end of the compressor main unit 11. When the liquid level is low, the solenoid valve 7 is closed. The regulating valve 9 and the atomizing nozzle 10 are to further effectively utilize this part of the return oil to cool the compressed helium, and can be adjusted and set according to parameters such as the high and low pressure difference and the helium flow rate. As another example, the liquid level meter can be capacitive or inductive, which has an effective test effect on the lubricating oil used. As another example, a liquid level meter with a remote transmission signal is set in the automatic oil return device, and there is an alarm and action program. The signal of the liquid level meter is transmitted to the solenoid valve for switch control. The automatic oil return device integrates the control program, sets the high and low liquid level signals, including high-high and low-low alarms, and the high and low liquid level switch solenoid valve program. The solenoid valve uses the signal of the liquid level meter to realize the return of only the liquid phase oil, avoiding the mixing of gas and causing a short circuit between the high and low pressure gas circuits.

[0031] It should be noted that necessary process stop valves and regulating valves are set on the oil return pipeline, and the regulating valve can be adjusted according to the actual operating conditions. The oil from the automatic oil return device enters the air intake end of the compressor under the action of pressure difference. In order to use this part of the oil for oil spray cooling, a 0.5-3mm atomizing nozzle is set to atomize the oil and achieve better oil spray cooling effect.

[0032] In one embodiment, the ratio of the diameter of the central channel to the diameter of the coaxial outer tube is 1.2 to 2.5.

[0033] In one embodiment, the cross section of the central channel adopts a bevel groove of 15-45 degrees.

[0034] In one embodiment, the automatic oil return device is a container having the same pressure level as that of the compressor host.

[0035] In one embodiment, before the step of obtaining the measurement data of the liquid level meter, the step includes: in response to the target user's oil separation operation on the oil return device, starting the compressor host to increase the pressure of the oil-gas mixture to a set exhaust pressure and then discharge it into a primary cyclone oil separator, wherein the primary cyclone oil separator performs oil-gas separation to produce liquid oil in the internal volume of the filter element cylinder.

[0036] The oil return method proposed in this embodiment obtains the measurement data of the liquid level meter set in the automatic oil return device, and then opens the solenoid valve based on the measurement data, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process shut-off valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe from the liquid oil in the internal cavity of the filter element cylinder for oil and gas separation, thereby avoiding the reduction of volumetric efficiency caused by the high and low pressure short circuit of the gas during the oil return process, and avoiding the impact and oscillation of the intake and exhaust pressures of the compressor.

[0037] See also Figure 3 As shown, in one embodiment, an oil return device is provided, the device comprising:

[0038] An acquisition module 10 is used to acquire measurement data of the liquid level meter provided in the automatic oil return device;

[0039] The switch module 20 is used to open the solenoid valve based on the measurement data, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process shut-off valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to separate the oil and gas from the liquid oil in the internal cavity of the filter element cylinder.

[0040] In one embodiment, the switch module is further used to: determine whether the measurement data is greater than or equal to a preset oil discharge value;

[0041] If so, the solenoid valve is controlled to open.

[0042] In one embodiment, the ratio of the diameter of the central channel to the diameter of the coaxial outer tube is 1.2 to 2.5.

[0043] In one embodiment, the cross section of the central channel adopts a bevel groove of 15-45 degrees.

[0044] In one embodiment, the automatic oil return device is a container having the same pressure level as that of the compressor host.

[0045] In one embodiment, before the step of obtaining the measurement data of the liquid level meter, the step includes:

[0046] In response to the target user's oil separation operation on the oil return device, the compressor main unit is started to increase the pressure of the oil-gas mixture to a set exhaust pressure and then discharge it into a primary cyclone oil separator, wherein the primary cyclone oil separator performs oil-gas separation to produce liquid oil in the internal volume of the filter element cylinder.

[0047] In one embodiment, an oil return device is provided, and its internal structure diagram can be shown as follows: Figure 4 As shown. The oil return device includes a processor, a memory, a network interface, a database, a coaxial siphon oil return pipe, a primary oil separation filter element, a filter element cylinder, a primary cyclone oil separator, an automatic oil return device, a liquid level gauge, a solenoid valve, a process stop valve, a regulating valve, an atomizing nozzle, and a compressor host connected through a system bus. Among them, the processor of the oil return device is used to provide computing and control capabilities. The memory of the oil return device includes a non-volatile and / or volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the oil return device is used to communicate with an external client through a network connection. When the computer program is executed by the processor, it realizes the functions or steps of an oil return method.

[0048] In one embodiment, an oil return device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The oil return device includes a coaxial siphon oil return pipe, a primary oil separation filter element, a filter element cylinder, a primary cyclone oil separator, an automatic oil return device, a liquid level gauge, a solenoid valve, a process shut-off valve, a regulating valve, an atomizing nozzle, and a compressor host. The coaxial siphon oil return pipe includes a central channel and a coaxial outer tube, the central channel is arranged on the central axis of the coaxial outer tube, the exhaust end of the compressor host is connected to the air inlet end of the primary cyclone oil separator, the filter element cylinder is arranged inside the primary cyclone oil separator, and the filter element cylinder is provided with a primary oil separation filter element. The central channel of the coaxial siphon oil return pipe and one end of the coaxial outer tube are both arranged at the bottom of the filter element cylinder, the other end of the central channel of the coaxial siphon oil return pipe is arranged at the bottom of the automatic oil return device, the other end of the coaxial outer tube of the coaxial siphon oil return pipe is arranged in an outer area close to the automatic oil return device, the automatic oil return device is provided with the liquid level gauge, the oil discharge end of the automatic oil return device is connected to the inlet end of the solenoid valve, the outlet end of the solenoid valve is connected to the inlet end of the process stop valve, the outlet end of the process stop valve is connected to one end of the regulating valve, the other end of the regulating valve is connected to one end of the atomizing nozzle, and the spraying end of the atomizing nozzle is connected to the inlet end of the compressor host;

[0049] The oil return method comprises:

[0050] Acquiring measurement data of the liquid level meter provided in the automatic oil return device;

[0051] Based on the measurement data, the solenoid valve is opened, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to discharge the liquid oil in the internal cavity of the filter element cylinder for oil and gas separation.

[0052] The oil return method proposed in this embodiment obtains the measurement data of the liquid level meter set in the automatic oil return device, and then opens the solenoid valve based on the measurement data, wherein the liquid phase oil inside the automatic oil return device sequentially enters the compressor main engine through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle, and the liquid phase oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe from the liquid phase oil in the internal cavity of the filter element cylinder body separated from oil and gas. It can avoid the reduction of volumetric efficiency caused by the high and low pressure short circuit of gas during the oil return process, and avoid the impact and oscillation of the intake and exhaust pressure of the compressor.

[0053] In one embodiment, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0054] Acquiring measurement data of the liquid level meter provided in the automatic oil return device;

[0055] Based on the measurement data, the solenoid valve is opened, wherein the liquid oil inside the automatic oil return device enters the compressor main unit through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle in sequence, and the liquid oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe to discharge the liquid oil in the internal cavity of the filter element cylinder for oil and gas separation.

[0056] The oil return method proposed in this embodiment obtains the measurement data of the liquid level meter set in the automatic oil return device, and then opens the solenoid valve based on the measurement data, wherein the liquid phase oil inside the automatic oil return device sequentially enters the compressor main engine through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle, and the liquid phase oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe from the liquid phase oil in the internal cavity of the filter element cylinder body separated from oil and gas. It can avoid the reduction of volumetric efficiency caused by the high and low pressure short circuit of gas during the oil return process, and avoid the impact and oscillation of the intake and exhaust pressure of the compressor.

[0057] It should be noted that the functions or steps that can be implemented by the computer-readable storage medium or the oil return device can be found in the relevant descriptions of the server side and the client side in the aforementioned method embodiment. To avoid repetition, they will not be described one by one here.

[0058] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0059] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0060] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A compressor oil return method, characterized in that: Applied to oil return equipment, wherein the oil return equipment includes a coaxial siphon oil return pipe, a primary oil separation filter element, a filter element cylinder, a primary cyclone oil separator, an automatic oil return device, a liquid level gauge, a solenoid valve, a process shut-off valve, a regulating valve, an atomizing nozzle and a compressor host, the coaxial siphon oil return pipe includes a central channel and a coaxial outer tube, the central channel is arranged on the central axis of the coaxial outer tube, the exhaust end of the compressor host is connected to the air inlet end of the primary cyclone oil separator, the filter element cylinder is arranged inside the primary cyclone oil separator, the filter element cylinder is provided with a primary oil separation filter element, the central channel of the coaxial siphon oil return pipe and one end of the coaxial outer tube are both arranged at the bottom of the filter element cylinder, and the other end of the central channel of the coaxial siphon oil return pipe is arranged The bottom of the automatic oil return device, the other end of the coaxial outer tube of the coaxial siphon oil return pipe is arranged in the outer area close to the automatic oil return device, the automatic oil return device is provided with the liquid level gauge, the oil discharge end of the automatic oil return device is connected to the inlet end of the solenoid valve, the outlet end of the solenoid valve is connected to the inlet end of the process stop valve, the outlet end of the process stop valve is connected to one end of the regulating valve, the other end of the regulating valve is connected to one end of the atomizing nozzle, the spraying end of the atomizing nozzle is connected to the inlet end of the compressor host, the ratio of the diameter of the central channel to the coaxial outer tube is 1.2 to 2.5, the cross section of the central channel adopts a bevel groove of 15-45 degrees, and the automatic oil return device is a container with the same pressure level as the compressor host; The oil return method comprises: Acquiring measurement data of the liquid level meter provided in the automatic oil return device; Based on the measurement data, the solenoid valve is opened, wherein the liquid phase oil inside the automatic oil return device enters the compressor main engine through the solenoid valve, the process stop valve, the regulating valve and the atomizing nozzle in sequence, and the liquid phase oil inside the automatic oil return device is automatically discharged into the automatic oil return device by the coaxial siphon oil return pipe from the liquid phase oil in the internal volume of the filter element cylinder body after oil and gas separation; The step of opening the solenoid valve based on the measurement data comprises: Determining whether the measured data is greater than or equal to a preset oil discharge value; If so, the solenoid valve is controlled to open.

2. The oil return method according to claim 1, characterized in that: Before the step of obtaining the measurement data of the liquid level meter provided in the automatic oil return device, the method includes: In response to the target user's oil separation operation on the oil return device, the compressor main unit is started to increase the pressure of the oil-gas mixture to a set exhaust pressure and then discharge it into a primary cyclone oil separator, wherein the primary cyclone oil separator performs oil-gas separation to produce liquid oil in the internal volume of the filter element cylinder.

3. An oil return device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the oil return method according to any one of claims 1 to 2 are implemented.

4. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the oil return method according to any one of claims 1 to 2 are implemented.

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