Compressor system, oil return control method, air conditioner and storage medium

Abstract

The application provides a compressor system, an oil return control method, an air conditioner and a storage medium, wherein the compressor system comprises a compressor body, a crankshaft and a bearing sleeved on the crankshaft, the compressor body comprises an oil pool, the crankshaft is internally provided with a main pump oil passage, the bottom of the crankshaft extends to the oil pool, the main pump oil passage is provided with a first oil vane and a second oil vane located above the first oil vane, the bearing is sleeved outside the second oil vane, and the bearing is provided with an oil return through hole communicated to the main pump oil passage; and the auxiliary pump oil circuit comprises an electric control valve, one end of the electric control valve is connected to the oil return through hole through a pipeline, and the other end of the electric control valve is connected to the oil pool through a pipeline. The embodiment provided by the application can enable the compressor to operate in a wider frequency range, while meeting the high-frequency oil level requirement and the low-frequency lubrication requirement, and improve the reliability of the compressor during full-band operation.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a compressor system, an oil return control method, an air conditioner, and a storage medium. Background Technology

[0002] In current residential air conditioning systems, compressor oil and refrigerant are miscible and participate in the system circulation. The compressor oil discharged from the compressor exhaust pipe, after circulating through the system, enters the oil sump at the bottom of the compressor through the oil return hole of the receiver, undergoing periodic circulation to maintain a normal oil level in the sump and ensure reliable and normal compressor operation. As the compressor operating frequency increases, the amount of oil discharged increases, especially when meeting the demand for high heating capacity at ultra-low temperatures. The compressor operates at high frequency, and the system pressure is very low at this time, making it highly susceptible to poor compressor oil return. More compressor oil participating in the system circulation lowers the minimum oil level requirement in the compressor oil sump, seriously affecting the compressor's reliability and lifespan.

[0003] For compressor systems, the compressor typically uses the rotation of the crankshaft to pump the refrigerant oil in the oil sump through the oil hole at the lower end of the crankshaft to the compression chamber or to the oil hole channel at the upper end of the crankshaft to participate in the operation of the compressor pump body, thereby achieving lubrication and sealing. The amount of oil pumped by the compressor must not only meet the minimum oil level in the oil sump during high-frequency operation, but also ensure that the oil can be pumped smoothly to meet the lubrication requirements of the compressor during low-frequency operation.

[0004] Current compressor systems can only meet the high-frequency oil level requirements and low-frequency oil upward lubrication requirements within a certain frequency range. When applied to a wider frequency range, they cannot simultaneously meet the high-frequency oil level requirements and low-frequency oil upward lubrication requirements, resulting in insufficient reliability for high-speed, full-frequency applications of compressors. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, the present invention proposes a compressor system, an oil return control method, an air conditioner, and a storage medium, which enables the compressor to operate in a wider frequency range while taking into account both high-frequency oil level requirements and low-frequency lubrication requirements, thereby improving the reliability of the compressor during operation across the entire frequency band.

[0007] In a first aspect, embodiments of the present invention provide a compressor system, comprising:

[0008] The compressor body includes an oil sump, a crankshaft, and a bearing sleeved on the crankshaft; a main pump oil passage is provided inside the crankshaft, the bottom of the crankshaft extends to the oil sump, a first oil blade and a second oil blade located above the first oil blade are provided in the main pump oil passage, the bearing is sleeved outside the second oil blade, and the bearing is provided with an oil return through hole communicating with the main pump oil passage;

[0009] The auxiliary pump oil circuit includes an electrically controlled valve, one end of which is connected to the return oil through-hole via a pipeline, and the other end of which is connected to the oil sump via a pipeline.

[0010] The compressor system provided according to the first aspect of the present invention has at least the following beneficial effects: when the electronically controlled valve is closed, the auxiliary pump oil circuit is blocked, and under the rotation of the crankshaft, the first oil vane and the second oil vane work together to pump oil. At this time, only the main pump oil passage supplies oil to the compressor, so as to maintain the oil level in the oil sump of the compressor at high frequency operation not lower than the reference oil level; when the electronically controlled valve is opened, the auxiliary pump oil circuit is connected, the oil in the oil sump is drawn, and the oil enters the main pump oil passage through the auxiliary pump oil circuit and the return oil passage to increase the amount of oil pumped in the main pump oil passage. At this time, the auxiliary pump oil circuit and the main pump oil passage supply oil to the compressor together, so as to increase the amount of oil pumped by the compressor at low frequency or ultra-low frequency operation to meet the lubrication requirements, so as to maintain the normal operation of the compressor. The embodiments of the present invention can control and adjust the amount of oil pumped in the main pump oil channel according to the compressor operating frequency, reduce the probability of oil shortage during high-frequency operation of the compressor, ensure that the oil circuit lubrication meets the requirements when the compressor is operating at low or ultra-low frequency, and ensure that the oil level in the oil sump is qualified. That is, it can enable the compressor to operate in a wider frequency range, while taking into account both high-frequency oil level requirements and low-frequency lubrication requirements, improving the reliability of the compressor when operating across the entire frequency range, improving the system energy efficiency ratio, and extending the compressor life.

[0011] In one embodiment of the present invention, a control unit electrically connected to the electrically controlled valve is further included, the control unit being used to control the opening and closing of the electrically controlled valve according to the compressor operating frequency and a preset frequency value.

[0012] In the above technical solution, by setting a control unit that is electrically connected to the electronically controlled valve, the control unit controls the opening and closing of the electronically controlled valve according to the compressor operating frequency and the preset frequency value. This is beneficial to control the on / off of the auxiliary pump oil circuit through the opening and closing of the electronically controlled valve, thereby controlling the pumping amount in the main pump oil channel.

[0013] In one embodiment of the present invention, controlling the opening and closing of the electronically controlled valve according to the compressor operating frequency and a preset frequency value includes:

[0014] When the compressor's operating frequency is greater than the preset frequency value, the electronically controlled valve is closed.

[0015] When the compressor's operating frequency is less than or equal to the preset frequency value, the electronically controlled valve is opened.

[0016] In the above technical solution, the operating frequency of the compressor is determined by setting a preset frequency value. Then, the opening and closing of the electronically controlled valve is controlled according to the operating frequency of the compressor. Finally, the opening and closing of the electronically controlled valve controls the on / off of the auxiliary pump oil circuit. This is beneficial for controlling and adjusting the amount of oil pumped in the main pump oil channel at different operating frequencies of the compressor, improving the oil shortage phenomenon during high-frequency operation of the compressor, reducing oil discharge at high frequency, and ensuring that the oil level in the oil sump is qualified. At the same time, it ensures that the oil circuit lubrication meets the requirements when the compressor is running at low or ultra-low frequency, improves the reliability of the compressor during full-frequency operation, and improves the system energy efficiency ratio.

[0017] In one embodiment of the present invention, a return capillary tube is further provided between the electrically controlled valve and the oil sump.

[0018] In the above technical solution, by setting a return capillary tube between the electronically controlled valve and the oil sump, the flow rate of engine oil entering the main pump oil channel through the auxiliary pump oil circuit is controlled.

[0019] In one embodiment of the present invention, the main pump oil passage includes a first oil supply passage and a second oil supply passage located above the first oil supply passage. The diameter of the second oil supply passage is smaller than that of the first oil supply passage. The first oil blade is disposed in the first oil supply passage, and the second oil blade is disposed in the second oil supply passage.

[0020] In the above technical solution, by setting a first oil supply channel and a second oil supply channel with a diameter smaller than the first oil supply channel, the first oil blade and the second oil blade are respectively set in the first oil supply channel and the second oil supply channel, which plays a role in controlling the pumping rate to a certain extent.

[0021] In one embodiment of the present invention, the main pump oil passage further includes a third oil supply passage located above the second oil supply passage, the diameter of the third oil supply passage being smaller than that of the second oil supply passage, and the top of the third oil supply passage being closed.

[0022] In the above technical solution, by setting a third oil supply channel with a smaller diameter than the second oil supply channel above the second oil supply channel and sealing the top of the third oil supply channel, the pumping rate is further controlled.

[0023] In one embodiment of the present invention, the crankshaft is provided with an oil outlet hole on its side wall.

[0024] In the above technical solution, by setting an oil outlet hole on the side wall of the crankshaft, the oil flows out from the oil outlet hole under the action of centrifugal force and enters the compressor to play a lubricating role, thereby improving the reliability of compressor operation.

[0025] Secondly, embodiments of the present invention also provide an oil return control method, applied to the compressor system described in the first aspect, the oil return control method comprising:

[0026] Obtain the compressor operating frequency;

[0027] The opening and closing of the solenoid valve is controlled according to the compressor's operating frequency and a preset frequency value.

[0028] The oil return control method provided by the second aspect of the present invention has at least the following beneficial effects: controlling the opening and closing of the electronically controlled valve according to the compressor operating frequency and the preset frequency value is beneficial to controlling the on / off of the auxiliary pump oil circuit through the opening and closing of the electronically controlled valve, thereby controlling the pumping amount in the main pump oil channel.

[0029] In one embodiment of the present invention, controlling the opening and closing of the solenoid valve according to the compressor operating frequency and a preset frequency value includes:

[0030] When the compressor's operating frequency is greater than the preset frequency value, the electronically controlled valve is closed.

[0031] When the compressor's operating frequency is less than or equal to the preset frequency value, the electronically controlled valve is opened.

[0032] In the above technical solution, the compressor's operating frequency is first determined by setting a preset frequency value. Then, the opening and closing of the electronically controlled valve is controlled based on the compressor's operating frequency. Finally, the opening and closing of the electronically controlled valve controls the on / off state of the auxiliary pump oil circuit. When the compressor's operating frequency is greater than the preset frequency value (i.e., the compressor operates at a high frequency), the electronically controlled valve is closed, and the main pump oil channel operates independently, reducing the amount of oil pumped and ensuring a suitable oil level. When the compressor's operating frequency is less than or equal to the preset frequency value (i.e., the compressor operates at a low frequency), the electronically controlled valve is opened, allowing both the auxiliary pump oil circuit and the main pump oil channel to supply oil to the compressor simultaneously, ensuring normal compressor operation. This invention can control and adjust the amount of oil pumped in the main pump oil channel when the compressor operates at different frequencies, improving the oil shortage phenomenon during high-frequency compressor operation, reducing oil discharge at high frequencies, and ensuring a suitable oil level in the oil sump. Simultaneously, it ensures that the oil circuit lubrication meets requirements during low-frequency or ultra-low-frequency compressor operation, improving the reliability of the compressor across the entire frequency range and increasing the system's energy efficiency ratio.

[0033] Thirdly, embodiments of the present invention also provide an operation control device, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the oil return control method as described in the second aspect.

[0034] Fourthly, embodiments of the present invention also provide an air conditioner, including the operation control device as described in the third aspect.

[0035] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the oil return control method as described in any one of the second aspects.

[0036] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0037] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0038] Figure 1 This is a schematic diagram of the structure of a compressor provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of the first oil blade before and after modification according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of a crankshaft structure provided in an embodiment of the present invention;

[0041] Figure 4 This is a schematic flowchart of a return oil control method provided in an embodiment of the present invention;

[0042] Figure 5 This is a detailed flowchart of step S420 provided in an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the compressor operation when the electrically controlled valve is closed, according to an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the compressor operation when the electrically controlled valve is opened, according to an embodiment of the present invention;

[0045] Figure 8 This is an embodiment of the present invention that provides having Figure 1 The diagram shows the structure of an air conditioner with a compressor.

[0046] Figure 9 This is a schematic diagram of the structure of a control and operation device provided in an embodiment of the present invention.

[0047] Figure label:

[0048] Compressor system 100, compressor body 110, oil sump 111, crankshaft 112, bearing 113, oil return through hole 114, first oil blade 115, second oil blade 116, oil outlet hole 117, main pump oil passage 118, auxiliary pump oil circuit 120, electric control valve 121, oil return capillary tube 122, first oil supply passage 1181, second oil supply passage 1182, third oil supply passage 1183;

[0049] Air conditioner 200, four-way reversing valve 210, throttling device 220, outdoor unit 230, indoor unit 240. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0051] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0052] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0053] In the description of this invention, unless otherwise explicitly defined, terms such as "setup" and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0054] This invention proposes a compressor system, an oil return control method, an air conditioner, and a storage medium, which can improve the oil shortage phenomenon during high-frequency compressor operation, reduce oil discharge at high frequencies, and ensure the oil level in the oil sump is within acceptable limits. Simultaneously, it ensures that the oil circuit lubrication meets requirements during low-frequency or ultra-low-frequency compressor operation; improves the reliability of the compressor across the entire frequency range, and increases the system's energy efficiency ratio. In other words, it enables the compressor to operate over a wider frequency range while simultaneously addressing both high-frequency oil level requirements and low-frequency lubrication requirements, thereby improving the reliability of the compressor across the entire frequency range, increasing the system's energy efficiency ratio, and extending the compressor's lifespan.

[0055] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0056] Reference Figure 1The compressor system 100 includes a compressor body 110 and an auxiliary oil pump circuit 120. The compressor body 110 includes an oil sump 111, a crankshaft 112, and a bearing 113 mounted on the crankshaft 112. A main oil pump passage 118 is provided inside the crankshaft 112, with the bottom of the crankshaft 112 extending into the oil sump 111. A first oil blade 115 and a second oil blade 116 located above the first oil blade 115 are provided in the main oil pump passage 118. The bearing 113 is mounted outside the second oil blade 116 and has a return oil through-hole 114 communicating with the main oil pump passage 118. The auxiliary oil pump circuit 120 includes an electrically controlled valve 121, one end of which is connected to the return oil through-hole 114 via a pipeline, and the other end of which is connected to the oil sump 111 via a pipeline.

[0057] According to the compressor system 100 provided in the embodiment of the present invention, a main pump oil passage 118 is provided inside the crankshaft 112, and the bottom of the crankshaft 112 extends to the oil sump 111. A first oil blade 115 and a second oil blade 116 located above the first oil blade 115 are provided in the main pump oil passage 118. When the crankshaft 112 rotates, the first oil blade 115 and the second oil blade 116 also rotate. During the rotation, the oil can enter the crankshaft 112 through the helical surface of the first oil blade 115. However, due to the presence of centrifugal force, the oil will be... The spiral surface of the oil vane 115 undergoes centrifugal motion, meaning that the oil in the bottom oil sump 111 is drawn into the main pump oil passage 118. The first oil vane 115 and the second oil vane 116 provide the flow power for the oil in the main pump oil passage 118. The bearing 113 is sleeved on the outside of the second oil vane 116, and the bearing 113 is provided with a return oil through hole 114 communicating with the main pump oil passage 118. The second oil vane 116 can provide the flow power for the oil flowing in through the return oil through hole 114. The auxiliary pump oil circuit 120 includes an electrically controlled valve 121. One end of valve 21 is connected to the return oil through-hole 114 via a pipeline, and the other end of the solenoid valve 121 is connected to the oil sump 111 via a pipeline to the bottom of the oil sump 111. This ensures that engine oil is drawn through the auxiliary pump oil circuit 120. In addition, the solenoid valve 121 can control the opening and closing of the auxiliary pump oil circuit 120. Specifically, when the solenoid valve 121 is closed, the auxiliary pump oil circuit 120 is blocked. Under the rotation of the crankshaft 112, the first oil vane 115 and the second oil vane 116 work together to pump oil. At this time, only the main pump oil passage 118 provides pressure. The compressor is supplied with oil to maintain the oil level in the oil sump 111 at high-frequency operation, ensuring it is not lower than the reference oil level. When the electronically controlled valve 121 is opened, the auxiliary pump oil circuit 120 is connected, and the oil in the oil sump 111 is drawn out. The oil then enters the main pump oil passage 118 through the auxiliary pump oil circuit 120 and the return oil through-hole 114, increasing the amount of oil pumped in the main pump oil passage 118. At this time, the auxiliary pump oil circuit 120 and the main pump oil passage 118 jointly supply oil to the compressor, increasing the amount of oil pumped during low-frequency or ultra-low-frequency operation to maintain normal compressor operation. This embodiment of the invention can control and adjust the amount of oil pumped in the main pump oil passage 118 according to the compressor's operating frequency, improving the oil shortage phenomenon during high-frequency compressor operation, reducing oil discharge at high frequencies, and ensuring the oil level in the oil sump 111 is qualified. Simultaneously, it ensures that the oil circuit lubrication meets requirements during low-frequency or ultra-low-frequency compressor operation, improving the reliability of the compressor across the entire frequency range and increasing the system's energy efficiency ratio. In other words, it enables the compressor to operate in a wider frequency range while taking into account both high-frequency oil level requirements and low-frequency lubrication requirements, thereby improving the reliability of the compressor during full-frequency operation, increasing the system energy efficiency ratio, and extending the compressor's lifespan.

[0058] It is understood that a rotor is also mounted on the crankshaft 112, and the rotor's rotational speed is related to the compressor's operating frequency. The rotor operates at a certain frequency, driving the crankshaft 112 to rotate. Furthermore, the compressor system 100 provided by this invention is equipped with a liquid receiver, an exhaust port, and an intake port. Since other internal structures and working principles of the compressor system 100 are well known to those skilled in the art, they will not be described in detail in this embodiment.

[0059] It is understandable that the compressor operating frequency has a certain range, namely, a maximum operating frequency and a minimum operating frequency. It is also understandable that when the compressor operates at its maximum operating frequency, the amount of oil discharged increases, while the system pressure is very low at this time, making it highly susceptible to poor oil return from the compressor. This can result in the oil level in the oil sump 111 being lower than the reference oil level, severely affecting the compressor's reliability and lifespan. To reduce the amount of oil discharged when the compressor operates at its maximum operating frequency, one embodiment of the present invention modifies the structure of the first oil blade 115, specifically reducing the rotation of the first oil blade 115. In one example, referring to... Figure 2 , Figure 2 This is a schematic diagram of the structure of the first oil blade before and after modification according to an embodiment of the present invention. The design reduces the helix of the first oil blade 115 from 0.5T to 0.3T. When the compressor operates at its highest operating frequency, the reduced helix of the first oil blade 115 reduces the power provided by the first oil blade 115 to flow the oil, thereby reducing the amount of oil discharged and ensuring that the oil level in the oil sump 111 is not lower than the reference oil level.

[0060] It should be noted that the present invention does not impose specific restrictions on the design rotation of the first oil blade 115, which can be designed according to the actual compressor oil discharge requirements and the reference oil level height.

[0061] The reduced rotation of the first oil blade 115 solves the problem of excessive oil discharge and unqualified oil level when the compressor operates at its highest frequency. However, when the compressor operates at its lowest frequency, the reduced rotation of the first oil blade 115 results in insufficient oil discharge, affecting the normal operation of the compressor. Therefore, in one embodiment of the present invention, a second oil blade 116 and an auxiliary oil pump circuit 120 with an electrically controlled valve 121 are added to the compressor. When the compressor operates at low or ultra-low frequency, the electrically controlled valve 121 is opened, connecting the auxiliary oil pump circuit 120. The auxiliary oil pump circuit 120 increases the amount of oil in the main oil pump passage 118. The second oil blade 116 acts as a relay, providing the oil in the main oil pump passage 118 with the power to continue flowing, ensuring sufficient oil discharge to maintain the normal operation of the compressor at low or ultra-low frequency.

[0062] In one embodiment of the present invention, the compressor system 100 further includes a control unit electrically connected to the electrically controlled valve 121. The control unit is used to control the opening and closing of the electrically controlled valve 121 according to the compressor operating frequency and a preset frequency value. By providing a control unit electrically connected to the electrically controlled valve 121, the control unit controls the opening and closing of the electrically controlled valve 121 according to the compressor operating frequency and the preset frequency value. This facilitates the control of the on / off state of the auxiliary pump oil circuit 120 through the opening and closing of the electrically controlled valve 121, thereby controlling the pumping quantity in the main pump oil passage 118. It should be noted that the electrically controlled valve 121 can be a solenoid valve or an electric valve. This application does not impose specific limitations on the type of electrically controlled valve 121, as long as it can be electrically connected to the control unit and can be opened and closed under the control of the control unit.

[0063] In one embodiment of the present invention, controlling the opening and closing of the electronically controlled valve 121 according to the compressor operating frequency and a preset frequency value includes: controlling the electronically controlled valve 121 to close when the compressor operating frequency is greater than the preset frequency value; and controlling the electronically controlled valve 121 to open when the compressor operating frequency is less than or equal to the preset frequency value. Specifically, the compressor operating frequency is determined by setting a preset frequency value, and then the opening and closing of the electronically controlled valve 121 is controlled according to the compressor operating frequency. Finally, the opening and closing of the auxiliary pump oil circuit 120 is controlled by the opening and closing of the electronically controlled valve 121. This is beneficial for controlling and adjusting the amount of oil pumped in the main pump oil channel 118 at different operating frequencies of the compressor, improving the oil shortage phenomenon during high-frequency operation of the compressor, reducing oil discharge at high frequency of the compressor, and ensuring that the oil level in the oil sump 111 is qualified. At the same time, it ensures that the oil circuit lubrication meets the requirements when the compressor is running at low or ultra-low frequency; improves the reliability of the compressor during full-frequency operation; and improves the system energy efficiency ratio.

[0064] Reference Figure 1 In one embodiment of the present invention, a return capillary tube 122 is also provided between the solenoid valve 121 and the oil sump 111. By providing the return capillary tube 122 between the solenoid valve 121 and the oil sump 111, the gaseous refrigerant in the oil sump 111 is prevented from entering the main pump oil channel 118 through the auxiliary pump oil circuit 120.

[0065] Reference Figure 3 , Figure 3This is a schematic diagram of a crankshaft structure provided in one embodiment of the present invention. In one embodiment of the present invention, the main pump oil passage 118 includes a first oil supply passage 1181 and a second oil supply passage 1182 located above the first oil supply passage 1181. The diameter of the second oil supply passage 1182 is smaller than that of the first oil supply passage 1181. A first oil blade 115 is disposed in the first oil supply passage 1181, and a second oil blade 116 is disposed in the second oil supply passage 1182. By setting the first oil supply passage 1181 and the second oil supply passage 1182 with a diameter smaller than that of the first oil supply passage 1181, the first oil blade 115 and the second oil blade 116 are respectively engaged in the first oil supply passage 1181 and the second oil supply passage 1182, which to a certain extent plays a role in controlling the pumping rate. In one embodiment of the present invention, the main pump oil passage 118 further includes a third oil supply passage 1183 located above the second oil supply passage 1182. The diameter of the third oil supply passage 1183 is smaller than that of the second oil supply passage 1182, and the top of the third oil supply passage 1183 is closed. Specifically, by setting a third oil supply channel 1183 with a diameter smaller than that of the second oil supply channel 1182 above the second oil supply channel 1182, and sealing the top of the third oil supply channel 1183, the pumping rate is further controlled. It should be noted that the present invention does not impose specific limitations on the diameters of the first oil supply channel 1181, the second oil supply channel 1182, and the third oil supply channel 1183.

[0066] Reference Figure 3 In one embodiment of the present invention, an oil outlet hole 117 is provided on the side wall of the crankshaft 112. By providing the oil outlet hole 117 on the side wall of the crankshaft 112, engine oil flows out from the oil outlet hole 117 under the action of centrifugal force and enters the compressor to play a lubricating role, thereby improving the reliability of compressor operation. It should be noted that the present invention does not impose specific limitations on the number and shape of the oil outlet hole 117, and those skilled in the art can set it according to specific needs.

[0067] Reference Figure 4 , Figure 4 This is a schematic flowchart of a return oil control method provided in an embodiment of the present invention. The return oil control method is applied to... Figure 1 The compressor system 100 shown in this embodiment of the invention includes, but is not limited to, steps S410 and S420.

[0068] Step S410: Obtain the compressor operating frequency.

[0069] Step S420: Control the opening and closing of the solenoid valve according to the compressor operating frequency and the preset frequency value.

[0070] The oil return control method provided by the embodiments of the present invention can obtain the compressor operating frequency and control the opening and closing of the electronically controlled valve 121 according to the compressor operating frequency and a preset frequency value. This facilitates the control of the auxiliary pump oil circuit 120 through the opening and closing of the electronically controlled valve 121, thereby controlling the pumping quantity in the main pump oil channel 118. This allows the compressor to operate in a wider frequency range while taking into account both high-frequency oil level requirements and low-frequency lubrication requirements, improving the reliability of the compressor during full-frequency operation, increasing the system energy efficiency ratio, and extending the compressor's lifespan.

[0071] Reference Figure 5 , Figure 5 This is a flowchart of step S420 provided in an embodiment of the present invention. Step S420 controls the opening and closing of the solenoid valve according to the compressor operating frequency and a preset frequency value, including but not limited to steps S510 and S520:

[0072] Step S510: When the compressor operating frequency is greater than the preset frequency value, the control valve is closed.

[0073] Step S520: When the compressor operating frequency is less than or equal to the preset frequency value, control the electronically controlled valve to open.

[0074] First, the compressor's operating frequency is determined by setting a preset frequency value. Then, the opening and closing of the electronically controlled valve 121 is controlled based on the compressor's operating frequency. Finally, the opening and closing of the electronically controlled valve 121 controls the on / off state of the auxiliary oil pump circuit 120. When the compressor's operating frequency is greater than the preset frequency value, i.e., the compressor's operating frequency is high, the electronically controlled valve 121 is closed, and the main oil pump channel 118 operates independently, reducing the amount of oil pumped and ensuring the oil level is within acceptable limits. When the compressor's operating frequency is less than or equal to the preset frequency value, i.e., the compressor's operating frequency is low, the electronically controlled valve 121 is opened, allowing both the auxiliary oil pump circuit 120 and the main oil pump channel 118 to simultaneously supply oil to the compressor, ensuring normal compressor operation. This embodiment of the invention can control and adjust the amount of oil pumped in the main oil pump channel 118 when the compressor operates at different frequencies, improving the oil shortage phenomenon during high-frequency compressor operation, reducing oil discharge at high frequencies, and ensuring the oil level in the oil sump 111 is within acceptable limits. Simultaneously, it ensures that the oil circuit lubrication meets requirements during low-frequency or ultra-low-frequency compressor operation, improving the reliability of the compressor across the entire frequency range and increasing the system's energy efficiency ratio. The embodiments of the present invention enable the compressor to operate in a wider frequency range, while taking into account both high-frequency oil level requirements and low-frequency lubrication requirements, thereby improving the reliability of the compressor during operation across the entire frequency band, increasing the system energy efficiency ratio, and extending the compressor's lifespan.

[0075] It should be noted that the preset frequency value can be designed according to the actual working requirements of the compressor, and this invention does not impose specific limitations on it.

[0076] Specifically, refer to Figure 6 , Figure 6 This is a schematic diagram of the compressor operation when the electrically controlled valve is closed, according to an embodiment of the present invention. When the compressor operates at a high frequency, the electrically controlled valve 121 is closed by the control unit, blocking the auxiliary oil pump circuit 120. At this time, the main oil pump channel 118 operates independently to pump oil, so as to maintain the oil level in the oil sump during high-frequency operation of the compressor not lower than the reference oil level. The oil at the bottom of the oil sump 111 is drawn into the main oil pump channel 118 under the power provided by the first oil blade 115, and flows upward through the first oil supply channel 1181, the second oil supply channel 1182 and the third oil supply channel 1183 in sequence under the combined action of the first oil blade 115 and the second oil blade 116. The first oil supply channel 1181, the second oil supply channel 1182 and the third oil supply channel 1183 play a role in controlling the oil flow rate to a certain extent.

[0077] Specifically, refer to Figure 7 , Figure 7 This is a schematic diagram of compressor operation when the electrically controlled valve is open, according to an embodiment of the present invention. When the compressor operates at a low frequency, in order to provide sufficient oil to ensure the normal operation of the compressor, the electrically controlled valve 121 is opened by the control unit, which connects the auxiliary oil pump circuit 120. The auxiliary oil pump circuit 120 and the main oil pump channel 118 simultaneously supply oil to the compressor. While the main oil pump channel 118 is pumping oil, oil is drawn from the oil sump 111 and sequentially passes through the auxiliary oil pump circuit 120 and the return oil through hole 114 into the main oil pump channel 118 to increase the amount of oil pumped in the main oil pump channel 118, ensuring that the oil output meets the requirements when the compressor is operating at low or ultra-low frequencies.

[0078] Figure 8 This is an embodiment of the present invention that provides having Figure 1 The diagram shows the structure of an air conditioner with a compressor. Specifically, this air conditioner 200 is a heat pump air conditioner, including a compressor system 100, a four-way reversing valve 210, a throttling device 220, an outdoor unit 230, and an indoor unit 240, etc., capable of switching between cooling and heating functions. The compressor system 100 is the main functional part of the air conditioner 200 for cooling or heating. The compressor operating frequency characterizes the cooling or heating output capacity of the air conditioner 200. Since the principle of heat pump air conditioners is well known to those skilled in the art, it will not be described in detail in this embodiment. Figure 1When the air conditioner 200 with the compressor shown is operating normally, the control unit in the compressor system 100 first determines the compressor's operating frequency by setting a preset frequency value. Then, based on the compressor's operating frequency, it controls the opening and closing of the electronically controlled valve 121. Finally, the opening and closing of the electronically controlled valve 121 controls the on / off state of the auxiliary oil pump circuit 120. When the compressor operates at a high frequency, the electronically controlled valve 121 is closed, and the main oil pump channel 118 operates independently, reducing the amount of oil pumped and ensuring the oil level is within acceptable limits. When the compressor operates at a low frequency, the electronically controlled valve 121 is opened, allowing both the auxiliary oil pump circuit 120 and the main oil pump channel 118 to supply oil to the compressor simultaneously, ensuring normal compressor operation. The compressor can operate over a wider frequency range, balancing high-frequency oil level requirements and low-frequency lubrication requirements, improving the reliability of the compressor across the entire frequency range, increasing the system's energy efficiency ratio, and extending the compressor's lifespan. Using this compressor facilitates high-speed applications in air conditioners. Even when the air conditioner operates at high speeds, the compressor system 100 can guarantee reliable operation across the entire frequency range.

[0079] It should be noted that the compressor system 100 provided in this embodiment of the invention can be applied to high-speed heat pump air conditioners, as well as other air conditioners, to achieve the same effect.

[0080] Figure 9 This is a schematic diagram of the structure of a control and operation device provided in an embodiment of the present invention. The control and operation device 900 includes: a memory 910, a processor 920, and a computer program stored in the memory 910 and executable on the processor 920. When the computer program is executed, it is used to perform the above-described oil return control method.

[0081] The processor 920 and memory 910 can be connected via a bus or other means.

[0082] The memory 910, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the oil return control method described in the embodiments of the present invention. The processor 920 implements the above-described oil return control method by running the non-transitory software program and instructions stored in the memory 910. The memory 910 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and an application program required for at least one function; the data storage area may store the execution of the above-described oil return control method. In addition, the memory 910 may include high-speed random access memory and may also include non-transitory memory, such as at least one storage device, flash memory, or other non-transitory solid-state storage device. In some embodiments, the memory 910 may optionally include memory 910s remotely located relative to the processor 920, and these remote memories 910s may be connected to the control operation device 900 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0083] The non-transient software program and instructions required to implement the above-described oil return control method are stored in memory 910. When executed by one or more processors 920, the above-described oil return control method is performed, for example, executing... Figure 4 Method steps S410 to S420, Figure 5 Method steps S510 to S520.

[0084] This invention also provides a computer-readable storage medium storing computer-executable instructions for executing the aforementioned oil return control method. It is understood that the computer-readable storage medium stores computer-executable instructions that are executed by one or more control processors, for example, by one processor 920 in the aforementioned control operation device 900, causing the processor 920 to execute the aforementioned oil return control method, for example, to execute... Figure 4 Method steps S410 to S420, Figure 5 Method steps S510 to S520.

[0085] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0086] Those skilled in the art will understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, storage device storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0087] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A compressor system, characterized in that, include: The compressor body includes an oil sump, a crankshaft, and a bearing sleeved on the crankshaft; a main pump oil passage is provided inside the crankshaft, the bottom of the crankshaft extends into the oil sump, a first oil blade and a second oil blade located above the first oil blade are provided in the main pump oil passage, the bearing is sleeved outside the second oil blade, and the bearing is provided with an oil return through hole communicating with the main pump oil passage; wherein, the helical rotation of the first oil blade is reduced; An auxiliary pump oil circuit includes an electrically controlled valve, one end of which is connected to the return oil through-hole via a pipeline, and the other end of which is connected to the oil sump via a pipeline. The compressor system also includes a control unit electrically connected to the electronically controlled valve, which is used to control the opening and closing of the electronically controlled valve according to the compressor operating frequency and a preset frequency value. The method of controlling the opening and closing of the electronically controlled valve according to the compressor operating frequency and a preset frequency value includes: controlling the electronically controlled valve to close when the compressor operating frequency is greater than the preset frequency value; and controlling the electronically controlled valve to open when the compressor operating frequency is less than or equal to the preset frequency value.

2. The compressor system according to claim 1, characterized in that, An oil return capillary tube is also provided between the electrically controlled valve and the oil tank.

3. The compressor system according to claim 1, characterized in that, The main pump oil passage includes a first oil supply passage and a second oil supply passage located above the first oil supply passage. The diameter of the second oil supply passage is smaller than that of the first oil supply passage. The first oil blade is disposed in the first oil supply passage, and the second oil blade is disposed in the second oil supply passage.

4. The compressor system according to claim 3, characterized in that, The main pump oil passage also includes a third oil supply passage located above the second oil supply passage. The diameter of the third oil supply passage is smaller than that of the second oil supply passage, and the top of the third oil supply passage is closed.

5. The compressor system according to claim 1, characterized in that, The crankshaft has an oil outlet hole on its side wall.

6. A method for controlling oil return, characterized in that, Applied to the compressor system as described in claim 1, the oil return control method includes: Obtain the compressor operating frequency; The opening and closing of the electronically controlled valve is controlled according to the compressor operating frequency and the preset frequency value; The step of controlling the opening and closing of the electronically controlled valve according to the compressor operating frequency and a preset frequency value includes: When the compressor's operating frequency is greater than the preset frequency value, the electronically controlled valve is closed. When the compressor's operating frequency is less than or equal to the preset frequency value, the electronically controlled valve is opened.

7. An operation control device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the oil return control method as described in claim 6.

8. An air conditioner, characterized in that, Includes the operation control device as described in claim 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the oil return control method as described in claim 6.

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