Air conditioner oil return control method, device and storage medium

Abstract

The application belongs to the technical field of electrical appliances, and particularly relates to an air conditioner oil return control method and device and a storage medium. The application provides an air conditioner oil return device which comprises a condenser, a compressor, an oil storage device and a regulating valve. The condenser, the oil storage device, the regulating valve and a liquid storage tank of the compressor are sequentially connected through pipelines. A connecting end of the oil storage device and the condenser is located at the bottom of the condenser, so that lubricating oil accumulated at the bottom of the condenser can enter the oil storage device. The regulating valve is used for controlling the lubricating oil in the oil storage device to return to the liquid storage tank of the compressor, so that the lubricating oil accumulated at the bottom of the condenser can return to the compressor through the oil return device, the smooth oil return of the air conditioner system is realized under the condition of long pipelines, the operation condition of the compressor is improved, the failure and damage of the compressor caused by oil shortage are avoided, and the operation safety of the compressor is ensured.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, specifically relating to an air conditioning oil return control method, device, and storage medium. Background Technology

[0002] With the continuous improvement of production technology and the continuous growth of user demand, air conditioners have become a necessity for modern families and businesses.

[0003] In actual installation, traditional high-capacity air conditioners such as floor-standing units, built-in units, and ducted units often require long piping to connect the indoor and outdoor units to meet installation requirements due to the diverse installation conditions of different users.

[0004] However, in actual use cases, when long piping is used, the compressor cannot effectively return oil, which can lead to compressor failure or long-term oil shortage operation, reducing the compressor's service life. Summary of the Invention

[0005] To address the aforementioned issues, this application provides an air conditioning oil return control method, apparatus, and storage medium.

[0006] In a first aspect, this application provides an air conditioning oil return device, which includes: a condenser, a compressor, an oil storage device, and a regulating valve; wherein the condenser, the oil storage device, the regulating valve, and the liquid storage tank of the compressor are connected in sequence via pipelines;

[0007] The connection end of the oil storage device to the condenser is located at the bottom of the condenser, so that the lubricating oil accumulated at the bottom of the condenser can enter the oil storage device;

[0008] The regulating valve is used to control the return of lubricating oil in the oil storage device to the compressor's liquid storage tank.

[0009] Optionally, the air conditioning oil return device further includes: a control terminal; the oil storage device is equipped with a liquid level detection device for obtaining the lubricating oil level.

[0010] The control terminal is communicatively connected to the regulating valve and the liquid level detection device, and is used to control the opening and closing of the regulating valve according to the lubricating oil level.

[0011] Optionally, the air conditioning oil return device further includes: a gas-liquid separator;

[0012] The gas-liquid separator is connected between the regulating valve and the compressor's liquid storage tank via a pipeline. It is used to separate the liquid refrigerant mixed in the lubricating oil and deliver the lubricating oil to the compressor's liquid storage tank.

[0013] Optionally, the inlet of the gas-liquid separator is connected to the regulating valve via a pipe, and the outlet of the gas-liquid separator is connected to the liquid storage tank of the compressor via a pipe, so that the lubricating oil can enter the liquid storage tank of the compressor through the outlet.

[0014] Secondly, this application provides an air conditioning oil return control method, applied to the air conditioning oil return device described in the first aspect, the method comprising:

[0015] To obtain the lubricating oil level in the oil storage device;

[0016] The regulating valve is opened according to the lubricating oil level so that the lubricating oil in the oil storage device returns to the compressor's storage tank.

[0017] Optionally, controlling the opening of the regulating valve based on the lubricating oil level includes:

[0018] Determine whether the lubricating oil level has reached the first preset level.

[0019] If so, the regulating valve is controlled to open and close intermittently, so that the lubricating oil is injected into the pipeline.

[0020] Optionally, controlling the regulating valve to open and close includes:

[0021] Based on the correspondence between the lubricating oil level and the opening parameters of the regulating valve, the target opening parameters corresponding to the lubricating oil level are determined, and the target opening parameters include the opening degree and / or opening duration of the regulating valve.

[0022] According to the target opening parameters, the regulating valve is controlled to open and close intermittently until the lubricating oil level is lower than the second preset level.

[0023] Optionally, the opening degree of the regulating valve is positively correlated with the lubricating oil level, and the opening duration is positively correlated with the lubricating oil level.

[0024] Thirdly, this application provides an air conditioning oil return control device, applied to the air conditioning oil return device described in the first aspect, the device comprising:

[0025] The acquisition module is used to acquire the lubricating oil level in the oil storage device;

[0026] The control module is used to control the opening of the regulating valve according to the lubricating oil level, so that the lubricating oil in the oil storage device returns to the compressor's liquid storage tank.

[0027] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon;

[0028] When the computer program is executed by the processor, it implements the method as described in the second aspect.

[0029] The air conditioning oil return device provided in this application includes: a condenser, a compressor, an oil storage device, and a regulating valve; wherein, the condenser, the oil storage device, the regulating valve, and the compressor's liquid storage tank are connected sequentially via pipelines; the connection end of the oil storage device to the condenser is located at the bottom of the condenser, so that the lubricating oil accumulated at the bottom of the condenser can enter the oil storage device; the regulating valve is used to control the lubricating oil in the oil storage device to return to the compressor's liquid storage tank, so that the lubricating oil accumulated at the bottom of the condenser can return to the compressor through the oil return device, realizing smooth oil return of the air conditioning system under long piping conditions, improving the compressor's operating conditions, avoiding compressor failures and damage caused by oil shortage, and ensuring the compressor's operational safety. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0031] Figure 1 A schematic diagram of the structure of an air conditioning oil return device provided in this application. Figure 1 ;

[0032] Figure 2 A schematic diagram of the structure of an air conditioning oil return device provided in this application. Figure 2 ;

[0033] Figure 3 A flowchart illustrating an air conditioning oil return control method provided in this application. Figure 1 ;

[0034] Figure 4 A flowchart illustrating an air conditioning oil return control method provided in this application. Figure 2 ;

[0035] Figure 5 This is a schematic diagram of the structure of an air conditioning oil return control device provided in this application.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0039] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] With the continuous improvement of production technology and the continuous growth of user demand, air conditioners have become a necessity for modern families and businesses.

[0041] In actual installation, traditional high-capacity air conditioners such as floor-standing units, built-in units, and ducted units often require long piping to connect the indoor and outdoor units to meet installation requirements due to the diverse installation conditions of different users.

[0042] However, in actual use cases, when using long piping, the lubricating oil is prone to separating from the refrigerant and adhering to the pipe wall. Due to the limited flow velocity of the refrigerant and the limited diameter of the refrigerant pipe, it is difficult for all the lubricating oil to flow back to the compressor with the refrigerant vapor. This results in the compressor not being able to return oil effectively, causing compressor failure or long-term oil shortage operation, and reducing the service life of the compressor.

[0043] To address the above problems, the present invention proposes the following technical concept: Since the lubricating oil accumulates mainly at the bottom of the condenser, a pipe can be added to the bottom of the condenser. This pipe is connected in sequence to an oil storage device, a regulating valve, and a compressor liquid receiver, so that the lubricating oil accumulated at the bottom of the condenser can return to the compressor through the pipe, thus achieving smooth oil return in the long-pipe air conditioning system.

[0044] Figure 1 A schematic diagram of the structure of an air conditioning oil return device provided in this application embodiment. Figure 1,like Figure 1 As shown: The air conditioning oil return device 100 includes: a condenser 101, a compressor 102, an oil storage device 103, and a regulating valve 104;

[0045] The condenser 101, the oil storage device 103, the regulating valve 104, and the liquid storage tank 1020 of the compressor 102 are connected in sequence by pipelines.

[0046] The connection end of the oil storage device 103 and the condenser 101 is located at the bottom of the condenser 101, so that the lubricating oil accumulated at the bottom of the condenser 101 can enter the oil storage device 103.

[0047] The oil storage device can be, for example, a liquid storage tank. This embodiment does not limit the specific form of the oil storage device, as long as its pressure-bearing capacity meets the requirements of the air conditioning system. The regulating valve can be, for example, a solenoid valve or an electronic expansion valve. This embodiment does not limit the specific type of regulating valve.

[0048] Specifically, the bottom of the condenser 101 is connected to the inlet of the oil storage device 103 via a pipe 105, the outlet of the oil storage device is connected to one end of the regulating valve 104 via a pipe 106, and the other end of the regulating valve 104 is connected to the liquid storage tank 1020 of the compressor 102 via a pipe 107. The connection method of the above connection end can be, for example, a threaded connection, a bayonet connection, or a flange connection. A sealing ring can also be added to prevent leakage. This embodiment does not limit the specific connection method of the above connection end.

[0049] Understandably, residual lubricating oil in condenser 101 will accumulate at the bottom of condenser 101 due to gravity, and some liquid refrigerant in condenser 101 will also accumulate at the bottom. However, since the density of refrigerant is less than that of lubricating oil, and the two are immiscible, the liquid accumulated at the bottom of condenser 101 will separate into two layers due to the density difference: a small amount of liquid refrigerant on top and lubricating oil on the bottom. The internal pressure of condenser 101 is higher than that of oil storage device 103, and the liquid at the bottom of condenser will enter oil storage device 103 through pipe 105 due to the pressure difference. Since the connection between condenser 101 and pipe 105 is located at the bottom of condenser 101, below the height of the liquid stratification point, the liquid entering oil storage device 103 is mostly lubricating oil, with only a small amount of refrigerant.

[0050] The regulating valve 104 is used to control the return of lubricating oil in the oil storage device 103 to the liquid storage tank 1020 of the compressor 102.

[0051] Specifically, the lubricating oil at the bottom of the condenser 101 enters the oil storage device 103 through the pipe 105 due to the pressure difference. When the regulating valve 104 is closed, the lubricating oil is stored in the oil storage device 103. When the regulating valve 104 is opened, since the internal pressure of the oil storage device 103 is higher than the internal pressure of the liquid storage tank 1020 of the compressor 102, the lubricating oil in the oil storage device 103 will enter the liquid storage tank 1020 of the compressor 102 in sequence through the pipe 106, the regulating valve 104 and the pipe 107, and then enter the suction port of the compressor 102 through the liquid storage tank 1020, so as to realize the smooth oil return of the system.

[0052] The air conditioning oil return device provided in this embodiment includes: a condenser, a compressor, an oil storage device, and a regulating valve; wherein, the condenser, the oil storage device, the regulating valve, and the liquid storage tank of the compressor are connected in sequence by pipelines; the connection end of the oil storage device to the condenser is located at the bottom of the condenser, so that the lubricating oil accumulated at the bottom of the condenser can return to the compressor through the oil return device, realizing the smooth oil return of the air conditioning system in the case of long piping, and avoiding damage to the compressor due to lack of oil.

[0053] In some preferred embodiments, the connection end between the oil storage device 103 and the pipeline 106 can be located at the bottom of the oil storage device 103, so that after the lubricating oil and the small amount of refrigerant mixed in are separated in the oil storage device 103, the small amount of refrigerant mixed in the lubricating oil entering the pipeline 106 can be further reduced.

[0054] Optionally, the air conditioning oil return device further includes: a control terminal; the oil storage device 103 is equipped with a liquid level detection device for obtaining the lubricating oil level.

[0055] The control terminal is communicatively connected to the regulating valve 104 and the liquid level detection device, and is used to control the opening and closing of the regulating valve according to the lubricating oil level.

[0056] Understandably, the oil storage device 103 has a limited storage capacity, and the compressor requires a certain amount of oil to return during operation. The amount of lubricating oil in the oil storage device 103 reflects the amount of lubricating oil outside the compressor 102 at that time, and thus reflects the degree of oil shortage in the compressor. Therefore, a control terminal can be introduced into the air conditioning oil return device, and a liquid level detection device can be installed on the oil storage device 103 to obtain the lubricating oil level and indicate the amount of lubricating oil in the oil storage device 103. The control terminal is communicatively connected to the regulating valve 104 and the liquid level detection device to determine the target oil return flow rate based on the lubricating oil level in the oil storage device 103, and then control the regulating valve 104 to open and close according to the target oil return flow rate so that the lubricating oil returns to the compressor at an appropriate flow rate.

[0057] Figure 2 This application provides a schematic diagram of the structure of an air conditioning oil return device. Figure 2 ;like Figure 2 As shown, the air conditioning oil return device further includes: a gas-liquid separator 108;

[0058] The gas-liquid separator 108 is connected between the regulating valve 104 and the liquid storage tank 1020 of the compressor 102 via a pipeline, and is used to separate the refrigerant mixed in the lubricating oil and deliver the lubricating oil to the liquid storage tank of the compressor.

[0059] The inlet of the gas-liquid separator 108 is connected to the regulating valve 104 via pipe 109, and the outlet of the gas-liquid separator 108 is connected to the liquid storage tank of the compressor 102 via pipe 110, so that the lubricating oil can enter the liquid storage tank 1020 of the compressor via the outlet.

[0060] The gas-liquid separator 108 can be a gas-liquid separator pre-installed in the original air conditioning system, or it can be a gas-liquid separator independently installed in the air conditioning oil return device. This embodiment does not impose any restrictions here.

[0061] It is understandable that a small amount of refrigerant may still be mixed in the lubricating oil flowing from the regulating valve 104 to the compressor 102. The refrigerant may cause liquid slugging in the compressor 102 and damage the compressor 102. In order to avoid the above situation, a gas-liquid separator 108 can be added between the regulating valve 104 and the liquid storage tank 1020 of the compressor 102 to ensure the safe operation of the compressor.

[0062] Specifically, the lubricating oil flowing out of the regulating valve 104 enters the gas-liquid separator 108 through the inlet. Due to the sudden drop in pressure, a small amount of liquid refrigerant mixed in the lubricating oil will vaporize into gaseous refrigerant. The gaseous refrigerant and the lubricating oil enter the liquid storage tank 1020 of the compressor 102 through the outlet of the gas-liquid separator 108 and the pipe 110.

[0063] The air conditioning oil return device provided in this embodiment connects a gas-liquid separator to the oil return pipeline, so that a small amount of liquid refrigerant mixed in the lubricating oil is vaporized into gaseous refrigerant in the gas-liquid separator and then carries the lubricating oil back to the compressor's liquid receiver tank. This avoids the small amount of liquid refrigerant mixed in the lubricating oil from causing liquid slugging in the compressor, and further ensures the safe operation of the compressor.

[0064] Figures 1-2 The air conditioning oil return device of any corresponding embodiment can be used to perform... Figures 3-4 The technical solutions of any corresponding embodiment are similar in implementation principle and technical effect, and will not be described again here.

[0065] Figure 3 A flowchart illustrating an air conditioning oil return control method provided in this application embodiment. Figure 1 ;like Figure 3 As shown in the figure, the air conditioning oil return control method illustrated in this embodiment includes:

[0066] S201: Obtain the lubricating oil level in the oil storage device;

[0067] The lubricating oil level in the oil storage device is used to indicate the amount of lubricating oil stored in the device.

[0068] Specifically, the control terminal controls the liquid level detection device in the oil storage device to detect the lubricating oil level in the oil storage device in real time, and sends the detected lubricating oil level to the control device.

[0069] S202: Based on the lubricating oil level, control the regulating valve to open so that the lubricating oil in the oil storage device returns to the compressor's storage tank.

[0070] Understandably, the oil storage capacity of the oil reservoir is limited, and during compressor operation, it is necessary to ensure that the oil return volume meets certain requirements. The amount of lubricating oil stored in the oil reservoir can, to some extent, reflect the amount of lubricating oil currently outside the compressor, and thus reflect the degree of oil shortage in the compressor. Therefore, the lubricating oil level can be obtained, and based on the lubricating oil level, the regulating valve can be controlled to open, so that the lubricating oil returns to the compressor at an appropriate flow rate or velocity, ensuring the safe operation of the compressor.

[0071] Specifically, the control terminal determines the opening mode of the regulating valve based on the lubricating oil level and sends a control command to the regulating valve to control it to open according to the specified opening mode. For example, determining the opening mode based on the lubricating oil level can involve establishing a mapping relationship between the lubricating oil level and the valve opening degree, opening the regulating valve according to the opening degree corresponding to the lubricating oil level; alternatively, it can involve controlling the regulating valve to open when the lubricating oil level is higher than a preset height threshold and controlling it to close when it is lower than the preset height threshold. This embodiment does not limit the specific method for determining the opening mode of the regulating valve based on the lubricating oil level; the method only needs to ensure timely oil return.

[0072] The air conditioning oil return control method provided in this embodiment obtains the lubricating oil level in the oil storage device; based on the lubricating oil level, it controls the opening of the regulating valve, allowing the lubricating oil in the oil storage device to return to the compressor's liquid receiver. By obtaining the lubricating oil level in the oil storage device, the compressor's oil shortage status can be monitored in real time, and the regulating valve can be opened based on the lubricating oil level to prevent excessive accumulation of lubricating oil outside the compressor, ensuring the accuracy and timeliness of the air conditioning system's oil return, and further ensuring the normal operation of the compressor.

[0073] Figure 4 A flowchart illustrating an air conditioning oil return control method provided in this application embodiment. Figure 2 ;like Figure 4 As shown in the figure, the air conditioning oil return control method illustrated in this embodiment includes:

[0074] S301: Obtain the lubricating oil level in the oil storage device.

[0075] The implementation methods of step S201 and step S301 are similar, and will not be described again in this embodiment.

[0076] S302: Determine whether the lubricating oil level has reached the first preset level; if yes, proceed to step S303; if no, proceed to step S301.

[0077] The first preset liquid level height is used to indicate that when the lubricating oil level in the oil storage device reaches this height, the amount of lubricating oil stored in the oil storage device is excessive.

[0078] Understandably, the oil storage capacity of the oil reservoir is limited, and the compressor needs to ensure a certain amount of oil return during operation. The amount of lubricating oil stored in the oil reservoir can reflect the amount of lubricating oil outside the compressor at that time, and thus the degree of oil shortage in the compressor. Therefore, by judging whether the obtained lubricating oil level reaches the first preset level, it can be determined whether the amount of lubricating oil stored in the oil reservoir is excessive, and thus whether the compressor needs to return oil at this time. Based on this, the regulating valve is controlled to open and close, so as to start the oil return step at the appropriate time.

[0079] Specifically, the control terminal compares the value of the lubricating oil level in the oil storage device with the value of the first preset level. If the value of the lubricating oil level in the oil storage device is greater than or equal to the value of the first preset level, then step S303 is executed; if the value of the lubricating oil level in the oil storage device is less than the value of the first preset level, then step S301 is executed.

[0080] S303: Control the regulating valve to open and close until the lubricating oil level is lower than the second preset level.

[0081] Understandably, during air conditioning system operation, the pressure difference between the oil storage device and the suction port of the gas-liquid separator is usually large. When the regulating valve is continuously open, even at a small opening, the flow rate of lubricating oil through the regulating valve will be large, making it difficult to adjust the oil return rate in time. This results in a large amount of lubricating oil passing through the regulating valve per unit time, i.e., excessively fast oil return. In severe cases, the oil storage device may be emptied, and a large amount of refrigerant and gas in the condenser may enter the gas-liquid separator, causing excessive internal pressure and overload operation of the gas-liquid separator. Furthermore, the liquid refrigerant in the lubricating oil may not vaporize completely, leading to a large amount of lubricating oil and liquid refrigerant entering the compressor's suction port, damaging the compressor and even affecting the operation of the entire air conditioning system. Therefore, the regulating valve can be controlled to open and close intermittently, allowing the lubricating oil to be sprayed into the pipeline at certain time intervals and then into the gas-liquid separator, ensuring an appropriate oil return rate.

[0082] Optionally, the target opening parameter corresponding to the lubricating oil level can be determined based on the correspondence between the lubricating oil level and the opening parameter of the regulating valve.

[0083] The target opening parameters include the opening degree and / or opening duration of the regulating valve. The opening degree is used to indicate the degree to which the regulating valve is open or closed, and the opening duration is used to indicate the opening duration of the solenoid valve within one switching cycle when the solenoid valve is flashing open and closed and the solenoid valve switching cycle is fixed.

[0084] The opening degree of the regulating valve is positively correlated with the lubricating oil level, and the opening time is positively correlated with the lubricating oil level.

[0085] Understandably, controlling the return oil rate means controlling the flow rate of lubricating oil through the regulating valve. On one hand, the flow rate can be controlled by adjusting the opening degree of the regulating valve; on the other hand, when the solenoid valve is open and closed intermittently, the flow rate can be controlled by adjusting the opening duration of the solenoid valve, i.e., controlling the duration for which lubricating oil can pass through the regulating valve within a certain time period.

[0086] The higher the level of lubricating oil in the oil storage device, the more lubricating oil is located outside the compressor, the greater the compressor's demand for lubricating oil, the higher the required oil return rate, and the greater the required flow rate of lubricating oil through the regulating valve. Therefore, the opening degree of the regulating valve is positively correlated with the level of the lubricating oil, and the opening time is also positively correlated with the level of the lubricating oil.

[0087] Specifically, the control terminal pre-sets the correspondence between the lubricating oil level and the regulating valve opening parameters. Based on the current lubricating oil level in the oil storage device and the aforementioned correspondence, the control terminal determines the regulating valve opening parameters corresponding to the current lubricating oil level in the oil storage device as the target opening parameters.

[0088] According to the target opening parameters, the regulating valve is controlled to open and close intermittently until the lubricating oil level is lower than the second preset level.

[0089] The second preset liquid level height is used to indicate that when the lubricating oil level in the oil storage device reaches this height, the amount of lubricating oil stored in the oil storage device is relatively small.

[0090] Understandably, when the lubricating oil level is lower than the second preset level, it means that most of the lubricating oil in the system is outside the oil storage device. At this time, the regulating valve can be closed to stop the return of oil from the oil storage device to the compressor.

[0091] Specifically, the control terminal sends a control command to the regulating valve according to the target opening parameters, controlling the regulating valve to open and close according to the target opening parameters, and controls the liquid level detection device in the oil storage device to obtain the lubricating oil level in the oil storage device in real time, and compares its value with the value of the second preset liquid level. When the lubricating oil level is lower than the second preset liquid level, a control command is sent to the regulating valve to control the regulating valve to close.

[0092] The air conditioning oil return control method provided in this embodiment determines when to start and stop oil return, as well as the rate of oil return, based on the lubricating oil level in the oil storage device. This method is highly flexible and accurate, and is simple and easy to implement. It enables the air conditioning system with long piping to return oil in a timely and sufficient manner, ensuring the safe and normal operation of the compressor, reducing the possibility of malfunction and damage, and improving user satisfaction.

[0093] Figure 5 This is a schematic diagram of the structure of an air conditioning oil return control device provided in an embodiment of this application; as shown below. Figure 5 As shown, this application provides an air conditioning oil return control device, the air conditioning oil return control device 400 including:

[0094] The acquisition module 401 is used to acquire the lubricating oil level in the oil storage device;

[0095] The control module 402 is used to control the opening of the regulating valve according to the lubricating oil level, so that the lubricating oil in the oil storage device returns to the compressor's storage tank.

[0096] Optionally, the air conditioning oil return control device 400 further includes: a judgment module 403;

[0097] The judgment module 403 is specifically used to determine whether the lubricating oil level has reached the first preset level.

[0098] The control module 402 is specifically used to control the regulating valve to open and close when the lubricating oil level reaches a first preset height, so that the lubricating oil is sprayed into the pipeline.

[0099] Optionally, the control module 402 is specifically used to determine the target opening parameter corresponding to the lubricating oil level based on the correspondence between the lubricating oil level and the opening parameter of the regulating valve. The target opening parameter includes the opening degree and / or opening duration of the regulating valve.

[0100] According to the target opening parameters, the regulating valve is controlled to open and close intermittently until the lubricating oil level is lower than the second preset level.

[0101] In addition, this embodiment also provides a computer-readable storage medium storing a computer program thereon, which is executed by a processor to implement the air conditioning oil return control method of the above embodiment.

[0102] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0103] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0104] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0105] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute partial steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0106] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is merely an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0107] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An air conditioning oil return device, characterized in that, The air conditioning oil return device includes: a condenser, a compressor, an oil storage device, and a regulating valve; wherein the condenser, the oil storage device, the regulating valve, and the compressor's liquid storage tank are connected in sequence via pipelines; The connection end between the oil storage device and the condenser is located at the bottom of the condenser, so that the lubricating oil accumulated at the bottom of the condenser can enter the oil storage device. The regulating valve is used to control the lubricating oil in the oil storage device to return to the liquid storage tank of the compressor. The regulating valve is used to control the opening and closing of the oil storage device when the lubricating oil level reaches the first preset level, so that the lubricating oil is sprayed into the pipeline until the lubricating oil level is lower than the second preset level. The air conditioning oil return device also includes: a gas-liquid separator; The gas-liquid separator is connected between the regulating valve and the compressor's liquid storage tank via a pipeline. It is used to separate the liquid refrigerant mixed in the lubricating oil and deliver the lubricating oil to the compressor's liquid storage tank.

2. The apparatus according to claim 1, characterized in that, The air conditioning oil return device also includes: a control terminal; the oil storage device is equipped with a liquid level detection device for obtaining the lubricating oil level. The control terminal is communicatively connected to the regulating valve and the liquid level detection device, and is used to control the opening and closing of the regulating valve according to the lubricating oil level.

3. The apparatus according to claim 1, characterized in that, The inlet of the gas-liquid separator is connected to the regulating valve via a pipe, and the outlet of the gas-liquid separator is connected to the liquid storage tank of the compressor via a pipe, so that the lubricating oil can enter the liquid storage tank of the compressor through the outlet.

4. An air conditioning oil return control method, characterized in that, The method, applied to the air conditioning oil return device as described in any one of claims 1 to 3, comprises: To obtain the lubricating oil level in the oil storage device; The regulating valve is opened according to the lubricating oil level so that the lubricating oil in the oil storage device returns to the compressor's storage tank.

5. The method according to claim 4, characterized in that, The step of controlling the opening of the regulating valve based on the lubricating oil level includes: Determine whether the lubricating oil level has reached the first preset level. If so, the regulating valve is controlled to open and close intermittently, so that the lubricating oil is injected into the pipeline.

6. The method according to claim 5, characterized in that, The control of the regulating valve to open and close includes: Based on the correspondence between the lubricating oil level and the opening parameters of the regulating valve, the target opening parameters corresponding to the lubricating oil level are determined, and the target opening parameters include the opening degree and / or opening duration of the regulating valve. According to the target opening parameters, the regulating valve is controlled to open and close intermittently until the lubricating oil level is lower than the second preset level.

7. The method according to claim 6, characterized in that, The opening degree of the regulating valve is positively correlated with the lubricating oil level, and the opening duration is also positively correlated with the lubricating oil level.

8. An air conditioning oil return control device, characterized in that, An air conditioning oil return device as described in any one of claims 1 to 3, the device comprising: The acquisition module is used to acquire the lubricating oil level in the oil storage device; The control module is used to control the opening of the regulating valve according to the lubricating oil level, so that the lubricating oil in the oil storage device returns to the compressor's liquid storage tank.

9. A computer-readable storage medium, characterized in that, It contains computer programs; When the computer program is executed by a processor, it implements the method as described in any one of claims 4-7.

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