Air conditioning equipment and control methods thereof, computer-readable storage media

Abstract

This application discloses an air conditioning device and its control method, as well as a computer-readable storage medium, relating to the field of air conditioning device control technology. The air conditioning device includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, indoor heat exchanger, throttling module, and outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module. The control method of the air conditioning device includes, after heating operation and initiating the anti-oil blockage process, controlling the flow regulating valve to open and obtaining the inlet temperature of the outdoor heat exchanger; determining the target valve opening of the flow regulating valve based on the inlet temperature, and adjusting the valve opening of the flow regulating valve to the target valve opening.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment control technology, and in particular to an air conditioning equipment and its control method, and a computer-readable storage medium. Background Technology

[0002] Air conditioning systems using hydrocarbon refrigerants have extremely low refrigerant charges due to the flammable and explosive nature of these refrigerants. Therefore, higher heating capacity is typically achieved by increasing the compressor's displacement. However, this can lead to oil blockage in the air conditioning system under low-temperature conditions.

[0003] To prevent oil blockage in air conditioning equipment, the refrigerant temperature is usually controlled by reducing the compressor frequency and increasing the opening of the throttling module, thereby preventing oil blockage.

[0004] However, this method not only affects the superheat of the air conditioning equipment, thus reducing its heating efficiency, but also poses a risk of liquid carryover to the compressor, thereby reducing its reliability. Summary of the Invention

[0005] The main objective of this application is to provide an air conditioning device and its control method, as well as a computer-readable storage medium, which aims to avoid oil blockage in the air conditioning device while ensuring the heating efficiency and compressor reliability.

[0006] To achieve the above objectives, this application provides a control method for an air conditioning device. The air conditioning device includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, the indoor heat exchanger, the throttling module, and the outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module.

[0007] The control method for the air conditioning equipment includes:

[0008] After the heating operation is started and the oil blockage prevention process is initiated, the flow regulating valve is opened and the inlet temperature of the outdoor heat exchanger is obtained.

[0009] Based on the inlet temperature, determine the target valve opening of the flow regulating valve, and adjust the valve opening of the flow regulating valve to the target valve opening.

[0010] In one embodiment, the step of determining the target valve opening of the flow regulating valve based on the inlet temperature includes:

[0011] If the inlet temperature is less than the first preset temperature, then the target valve opening is determined to be the maximum valve opening of the flow regulating valve;

[0012] If the inlet temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, then the target valve opening is determined based on the inlet temperature, the first preset temperature, the second preset temperature and the maximum valve opening.

[0013] If the inlet temperature is greater than the second preset temperature, then the target valve opening is determined to be zero.

[0014] In one embodiment, the step of determining the target valve opening based on the inlet temperature, the first preset temperature, the second preset temperature, and the maximum valve opening includes:

[0015] The temperature difference ratio is calculated based on the temperature difference between the second preset temperature and the inlet temperature, and the temperature difference between the second preset temperature and the first preset temperature.

[0016] The target valve opening is obtained by multiplying the temperature difference ratio by the maximum valve opening.

[0017] In one embodiment, the method further includes:

[0018] If the outdoor ambient temperature and / or the outdoor heat exchanger temperature are monitored to be lower than the preset oil blockage temperature, or if the air conditioning equipment is monitored to have completed defrosting, the oil blockage prevention process is triggered.

[0019] In one embodiment, the method further includes:

[0020] If the air conditioning equipment is detected to be in heating and defrosting mode, the flow regulating valve is controlled to open to a preset degree.

[0021] In one embodiment, the method further includes:

[0022] The set temperature, indoor unit temperature, outdoor ambient temperature, and / or outdoor heat exchanger temperature of the air conditioning equipment are obtained.

[0023] If the temperature difference between the set temperature and the indoor unit temperature is less than or equal to a first preset temperature difference threshold, and the temperature difference between the outdoor ambient temperature and / or the outdoor heat exchanger temperature and the inlet temperature is less than or equal to a second preset temperature difference threshold, then the air conditioning device is controlled to enter the heating defrosting mode.

[0024] In one embodiment, after initiating the oil blockage prevention process, the method further includes:

[0025] The duration of the air conditioning device being in the anti-oil blockage process is obtained;

[0026] If the duration exceeds the preset duration, the air conditioning device is controlled to exit the oil blockage prevention process.

[0027] In one embodiment, after initiating the oil blockage prevention process, the method further includes:

[0028] If a change in the set temperature of the air conditioning device is detected, the air conditioning device is controlled to exit the oil blockage prevention process.

[0029] In addition, to achieve the above objectives, this application also provides an air conditioning device, which includes a memory, a processor, and a control program for the air conditioning device stored in the memory and executable on the processor. When the automatic control program is executed by the processor, it implements the steps of the control method for the air conditioning device as described above.

[0030] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning device as described above.

[0031] In addition, to achieve the above objectives, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning device as described above.

[0032] This application provides a control method for an air conditioning device. The air conditioning device includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, indoor heat exchanger, throttling module, and outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module. After heating operation and initiating the oil blockage prevention process, the flow regulating valve is opened to obtain the inlet temperature of the outdoor heat exchanger. Based on the inlet temperature, the target valve opening of the flow regulating valve is determined, and the valve opening of the flow regulating valve is adjusted to the target valve opening.

[0033] This application adds a flow regulating valve to the air conditioning equipment and connects it in series with the compressor's cooling passage in a bypass flow path. One end of this bypass flow path connects between the indoor heat exchanger and the throttling module, while the other end connects between one end of the bypass flow path and the throttling module. Thus, after heating operation and initiating the anti-oil blockage process, the flow regulating valve can be controlled to open. The valve opening can be adjusted according to the inlet temperature of the outdoor heat exchanger, allowing the compressor's cooling passage to efficiently transfer heat from the compression chamber to the throttling module, thereby preventing oil blockage in the air conditioning equipment. Therefore, since this application does not require adjustments to the original operating parameters of the compressor and throttling module, oil blockage in the air conditioning equipment can be avoided, thus not affecting the overheating of the air conditioning equipment or the reliability of the compressor.

[0034] Therefore, this application can achieve the following effect: while ensuring the heating efficiency of the air conditioning equipment and the reliability of the compressor, it avoids the phenomenon of oil blockage in the air conditioning equipment. Attached Figure Description

[0035] 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.

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the air conditioning equipment involved in the embodiments of this application;

[0038] Figure 2 This is a schematic diagram of the structure of the positive displacement compressor involved in the embodiments of this application;

[0039] Figure 3 This is a flowchart illustrating the first embodiment of the control method for an air conditioning device according to this application.

[0040] Figure 4 This is an overall flowchart of the control method for the air conditioning equipment according to an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the hardware operating environment involved in the embodiments of this application.

[0042] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0044] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Air conditioning systems using hydrocarbon refrigerants have extremely low refrigerant charges due to the flammable and explosive nature of these refrigerants. Therefore, higher heating capacity is typically achieved by increasing the compressor's displacement. However, this can lead to oil blockage in the air conditioning system under low-temperature conditions.

[0046] To prevent oil blockage in air conditioning equipment, the refrigerant temperature is usually controlled by reducing the compressor frequency and increasing the opening of the throttling module, thereby preventing oil blockage.

[0047] However, this method not only affects the superheat of the air conditioning equipment, thus reducing its heating efficiency, but also poses a risk of liquid carryover to the compressor, thereby reducing its reliability.

[0048] This application provides a control method for an air conditioning device. The air conditioning device includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, indoor heat exchanger, throttling module, and outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module. After heating operation and initiating the oil blockage prevention process, the flow regulating valve is opened to obtain the inlet temperature of the outdoor heat exchanger. Based on the inlet temperature, the target valve opening of the flow regulating valve is determined, and the valve opening of the flow regulating valve is adjusted to the target valve opening.

[0049] This application adds a flow regulating valve to the air conditioning equipment and connects it in series with the compressor's cooling passage in a bypass flow path. One end of this bypass flow path connects between the indoor heat exchanger and the throttling module, while the other end connects between one end of the bypass flow path and the throttling module. Thus, after heating operation and initiating the anti-oil blockage process, the flow regulating valve can be controlled to open. The valve opening can be adjusted according to the inlet temperature of the outdoor heat exchanger, allowing the compressor's cooling passage to efficiently transfer heat from the compression chamber to the throttling module, thereby preventing oil blockage in the air conditioning equipment. Therefore, since this application does not require adjustments to the original operating parameters of the compressor and throttling module, oil blockage in the air conditioning equipment can be avoided, thus not affecting the overheating of the air conditioning equipment or the reliability of the compressor.

[0050] Therefore, this application can achieve the following effect: while ensuring the heating efficiency of the air conditioning equipment and the reliability of the compressor, it avoids the phenomenon of oil blockage in the air conditioning equipment.

[0051] The execution subject of the control method for air conditioning equipment in this application can be an air conditioning device, or a server, central controller, wired controller, or other device that controls other devices to regulate the air. It can also be a control system or control circuit with corresponding functions; this embodiment does not specifically limit this. The air conditioning device refers to a device that processes the air in a workspace to maintain a set temperature and humidity, and to control the content of dust and harmful gases in the workspace. This air conditioning device can be an air conditioner, dehumidifier, humidifier, etc., and this embodiment does not specifically limit this either.

[0052] When using an air conditioning device to implement the control method of the air conditioning device in the following embodiments, the air conditioning device can be equipped with a flow regulating valve added to its original structure, and connected in series with the cooling passage of the compressor in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end is connected between one end of the bypass flow path and the throttling module, thereby obtaining the following... Figure 1 The structure shown.

[0053] It should be noted that, in order for the compressor's cooling passages to provide more heat from the compression chamber to the throttling module, the compression chamber can be selected from a part of the compressor that generates higher temperatures. For example, taking a positive displacement compressor as an example, please refer to... Figure 2 The compression chamber can be an upper bearing, a cylinder, or a lower bearing.

[0054] The following description uses an air conditioning device as the main implementer to illustrate the various embodiments.

[0055] Based on this, this application proposes a control method for an air conditioning device according to a first embodiment. The air conditioning device includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, indoor heat exchanger, throttling module, and outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module. Please refer to... Figure 3 The control method for air conditioning equipment includes steps S10 to S20:

[0056] Step S10: After heating operation and starting the oil blockage prevention process, control the flow regulating valve to open and obtain the inlet temperature of the outdoor heat exchanger.

[0057] It should be noted that the throttling module can be an electronic expansion valve, a throttling valve, a throttling ring, or other devices that can limit fluid flow; this embodiment does not specifically limit this. A temperature sensor can be installed at the outlet of the throttling module or the inlet of the outdoor heat exchanger, thereby obtaining the inlet temperature of the outdoor heat exchanger. The outlet of the throttling module or the inlet of the outdoor heat exchanger can have only one temperature sensor or multiple temperature sensors; this embodiment does not specifically limit this.

[0058] Step S20: Determine the target valve opening of the flow control valve based on the inlet temperature, and adjust the valve opening of the flow control valve to the target valve opening.

[0059] It should be noted that the target valve opening is negatively correlated with the inlet temperature. The heat flow rate supplied by the compressor's cooling passage to the throttling module is positively correlated with the target valve opening. Heat flow rate refers to the amount of heat supplied by the compressor's cooling passage to the throttling module per unit time.

[0060] Additionally, it should be noted that when determining the target valve opening of the flow control valve based on the inlet temperature, a relationship table can be pre-configured to record different inlet temperatures and valve openings that have a mapping relationship with the inlet temperatures. The target valve opening of the flow control valve can then be obtained by looking up the valve opening corresponding to the inlet temperature in this relationship table. Alternatively, the target valve opening of the flow control valve can be determined in different ways by comparing the inlet temperature with a first preset temperature and a second preset temperature; wherein the first preset temperature is less than the second preset temperature. This embodiment does not specifically limit the implementation method of step S20.

[0061] In one feasible implementation of determining the target valve opening of the flow control valve in different ways by comparing the inlet temperature with the first preset temperature and the second preset temperature, step S20 may include steps S21 to S23:

[0062] Step S21: If the inlet temperature is less than the first preset temperature, then the target valve opening is determined to be the maximum valve opening of the flow control valve.

[0063] Understandably, if the inlet temperature of the outdoor heat exchanger is lower than the first preset temperature, it indicates that the outlet temperature of the throttling module is too low, inevitably leading to oil blockage in the air conditioning unit. To quickly prevent or worsen oil blockage, the flow control valve can be fully opened, i.e., adjusted to its maximum opening. This allows the compressor's cooling channel to provide maximum heat flow to the throttling module, enabling the module's outlet to heat up rapidly. Therefore, when the inlet temperature of the outdoor heat exchanger is lower than the first preset temperature, the maximum opening of the flow control valve can be used as the target valve opening to effectively prevent oil blockage in the air conditioning unit.

[0064] Based on this, it should be noted that when the flow control valve is adjusted to its maximum opening, the compressor's cooling passage will provide the maximum heat flow to the throttling module, thus accelerating the heat loss rate in the compression chamber. This will, in effect, impact the superheat of the air conditioning equipment. Therefore, to ensure the heating efficiency of the air conditioning equipment, the flow control valve is generally not adjusted to its maximum opening unless the inlet temperature of the outdoor heat exchanger is excessively low.

[0065] Step S22: If the inlet temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, then determine the target valve opening based on the inlet temperature, the first preset temperature, the second preset temperature and the maximum valve opening.

[0066] It should be noted that the first and second preset temperatures can be determined based on the actual parameter configuration of the air conditioning equipment. In actual use, the first preset temperature can generally be any value between -40℃ and 50℃, and the second preset temperature can generally be any value between -20℃ and 30℃.

[0067] Understandably, if the inlet temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, it indicates that the outlet temperature of the throttling module is not within the temperature range that would necessarily cause oil blockage in the air conditioning unit. However, since the inlet temperature is less than or equal to the second preset temperature, the current inlet temperature still carries a high probability of causing oil blockage in the air conditioning unit. To quickly prevent oil blockage or its further deterioration, a reasonable valve opening can be determined as the target valve opening based on the current inlet temperature, the first preset temperature, the second preset temperature, and the maximum valve opening. This ensures that the cooling channel of the subsequent compressor can provide a reasonable heat flow to the throttling module, thereby achieving the effect of preventing oil blockage in the air conditioning unit while maintaining its heating efficiency and compressor reliability.

[0068] In one feasible implementation, step S22 may include steps S221 to S222:

[0069] Step S221: Calculate the temperature difference ratio based on the temperature difference between the second preset temperature and the inlet temperature, and the temperature difference between the second preset temperature and the first preset temperature.

[0070] Step S222: Calculate the product of the temperature difference ratio and the maximum valve opening to obtain the target valve opening.

[0071] It should be noted that the calculation process of steps S221 and S222 can be expressed by the following formula:

[0072]

[0073] Where K1 is the target valve opening, T vo For the inlet temperature, T down The first preset temperature, T up The second preset temperature, K max This represents the maximum valve opening.

[0074] In another feasible implementation, to improve the efficiency of determining the target valve opening, a relationship table can be set up to record different inlet temperatures, a first preset temperature, a second preset temperature, the target valve opening, and valve openings that have a mapping relationship with the inlet temperature, the first preset temperature, the second preset temperature, and the maximum valve opening. Therefore, step S22 can include: searching the preset relationship table for the valve opening corresponding to the inlet temperature, the first preset temperature, the second preset temperature, and the maximum valve opening, and using this as the target valve opening.

[0075] The above are only two feasible implementation methods of step S22 provided in this embodiment. This embodiment does not specifically limit the specific implementation method of step S22.

[0076] Step S23: If the inlet temperature is greater than the second preset temperature, then the target valve opening is determined to be zero.

[0077] Understandably, if the inlet temperature is higher than the second preset temperature, it indicates that the outlet temperature of the throttling module is very high, which generally does not cause oil blockage in the air conditioning equipment, or the possibility of oil blockage is very low. In this case, the heat from the compression chamber does not need to be supplied to the throttling module. Therefore, the flow control valve can be closed, that is, its opening can be adjusted to zero. Thus, when the inlet temperature of the outdoor heat exchanger is higher than the second preset temperature, the target valve opening can be determined to be zero.

[0078] In another feasible implementation of determining the target valve opening of the flow control valve in different ways by comparing the inlet temperature with the first preset temperature and the second preset temperature, step S20 may include: if the inlet temperature is less than the first preset temperature, then the target valve opening is determined to be the first preset valve opening; if the inlet temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, then the target valve opening is determined to be the second preset valve opening; if the inlet temperature is greater than the second preset temperature, then the target valve opening is determined to be the third preset valve opening; wherein, the first preset valve opening is greater than the second preset valve opening, the second preset valve opening is greater than the third preset valve opening, and the first preset valve opening, the second preset valve opening and the third preset valve opening can be flexibly set by the user according to the actual situation, or can be a default value, and this embodiment does not specifically limit this.

[0079] This embodiment adds a flow regulating valve to the air conditioning unit and connects it in series with the compressor's cooling passage in a bypass flow path. One end of this bypass flow path connects between the indoor heat exchanger and the throttling module, while the other end connects between one end of the bypass flow path and the throttling module. Thus, after heating operation and initiating the anti-oil blockage process, the flow regulating valve can be controlled to open. The valve opening can be adjusted according to the inlet temperature of the outdoor heat exchanger, allowing the compressor's cooling passage to efficiently transfer heat from the compression chamber to the throttling module, thereby preventing oil blockage in the air conditioning unit. Therefore, since this embodiment does not require adjustment of the original operating parameters of the compressor and throttling module, oil blockage in the air conditioning unit can be avoided, thus not affecting the overheating of the air conditioning unit or the reliability of the compressor.

[0080] Therefore, this embodiment can achieve the following effect: while ensuring the heating efficiency of the air conditioning equipment and the reliability of the compressor, it avoids the phenomenon of oil blockage in the air conditioning equipment.

[0081] In addition, this embodiment provides heat from the compression chamber to the throttling module through the compressor's cooling channel, which also helps to increase the evaporation temperature of the air conditioning equipment, thereby reducing the compressor pressure ratio and compressor power consumption.

[0082] In addition, conventional techniques for preventing oil blockage in air conditioning equipment include replacing the lubricating oil with one that has a lower pour point to improve its low-temperature fluidity. However, lubricating oils with lower pour points that meet the requirements of air conditioning equipment are expensive. While this embodiment requires an additional flow control valve in the air conditioning equipment to achieve the desired effect, the flow control valve is less expensive than a lubricating oil with a lower pour point that meets the requirements of the air conditioning equipment. Therefore, the control method for air conditioning equipment provided in this embodiment has a lower implementation cost compared to existing technologies.

[0083] Based on the first embodiment described above, a second embodiment of the control method for the air conditioning equipment of this application is proposed. In the second embodiment, step S01 may be further included:

[0084] S01. If the outdoor ambient temperature and / or the outdoor heat exchanger temperature are monitored to be lower than the preset oil blockage temperature, or if the air conditioning equipment is monitored to have completed defrosting, the oil blockage prevention process is triggered.

[0085] It should be noted that the outdoor ambient temperature refers to the temperature of the working space where the air conditioning equipment is located, and the outdoor heat exchanger temperature refers to the temperature of the outdoor heat exchanger in the air conditioning equipment. Temperature sensors can be installed in the outdoor unit and / or the outdoor heat exchanger to obtain the outdoor ambient temperature and / or the outdoor heat exchanger temperature; however, only one temperature sensor or multiple temperature sensors can be used, and this embodiment does not specifically limit this. The preset oil plug temperature can be determined according to the actual parameter configuration of the air conditioning equipment. In actual use, the oil plug temperature can generally be any value below 0°C.

[0086] Additionally, it should be noted that after the air conditioning unit completes the transition from heating to defrosting under low-temperature conditions, it will be in the initial heating start-up phase. At this time, the compressor will instantly draw the refrigerant from the outdoor heat exchanger back into the compressor, causing a rapid drop in temperature after throttling. Consequently, the refrigerant / lubricating oil mixture is prone to a sudden drop in pressure and temperature when passing through the throttling module, leading to changes in the solubility and viscosity of the lubricating oil. If the temperature difference before and after throttling is too large, the oil content in the refrigerant will decrease, and the viscosity of the lubricating oil will increase exponentially with decreasing temperature, easily causing oil accumulation in low-temperature components such as capillary tubes and evaporator pipes. If the temperature is below the oil's pour point, solid paraffin will precipitate, thereby reducing its heat exchange characteristics and the reliability of the compressor. Please refer to Tables 1 and 2 below for a clearer understanding of the content described in this section.

[0087] Table 1:

[0088]

[0089] Table 2:

[0090] R290 air conditioner 0.01MPa -49℃ R32 air conditioner 0.20MPa -25℃

[0091] Based on the first and / or second embodiments described above, a third embodiment of the control method for the air conditioning equipment of this application is proposed. In the third embodiment, the control method for the air conditioning equipment further includes steps S100 to S200:

[0092] Step S100: If the air conditioning equipment is detected to be in heating and defrosting mode, control the flow regulating valve to open to the preset opening degree.

[0093] When the air conditioning equipment is in heating and defrosting mode, the refrigerant discharged from the compressor outlet passes through the indoor heat exchanger, the throttling module, and the outdoor heat exchanger in sequence. At this time, the indoor heat exchanger acts as a condenser, the outdoor heat exchanger acts as an evaporator, and the maximum opening of the throttling module is greater than the opening when the air conditioning equipment is in normal heating mode.

[0094] It should be noted that the preset opening degree can be set according to the defrosting opening degree. For example, the preset opening degree can be set to any valve opening degree within the valve opening degree range corresponding to the defrosting opening degree; or the preset opening degree can be directly set to the defrosting opening degree. This embodiment does not specifically limit this.

[0095] In one feasible implementation, the valve opening range corresponding to the defrosting opening can be determined based on the defrosting opening degree. Specifically, the upper limit of the valve opening range is obtained by calculating the sum of the defrosting opening degree and the preset opening adjustment value; the lower limit of the valve opening range is obtained by calculating the difference between the defrosting opening degree and the preset opening adjustment value.

[0096] In this embodiment, when the air conditioning unit is in heating defrosting mode, the flow regulating valve is opened to a preset degree, allowing the compressor's cooling channel to efficiently supply heat from the compression chamber to the throttling module. The throttling module then further transfers the heat from the compression chamber provided by the cooling channel to the outdoor heat exchanger in the air conditioning unit, thereby assisting the outdoor heat exchanger in achieving normal defrosting in heating defrosting mode. Therefore, this embodiment overcomes the technical shortcomings of conventional methods that use the indoor heat exchanger to provide heat to the outdoor heat exchanger for normal defrosting in heating defrosting mode, which affects the heating efficiency of the air conditioning unit, ensuring the stability of the indoor unit temperature when the air conditioning unit is heating.

[0097] Therefore, this embodiment can improve the heating efficiency of air conditioning equipment in heating and defrosting mode while ensuring normal defrosting of the air conditioning equipment.

[0098] In one feasible implementation, the control method for the air conditioning equipment further includes steps S001 to S002:

[0099] Step S001: Obtain the set temperature of the air conditioning equipment, the indoor unit temperature, the outdoor ambient temperature, and / or the outdoor heat exchanger temperature;

[0100] It should be noted that the set temperature refers to the specific temperature value that the user or the device itself wishes to achieve and maintain. The indoor unit temperature refers to the temperature of the indoor unit in the air conditioning equipment. A temperature sensor can be installed in the indoor unit to obtain the indoor unit temperature; however, the indoor unit may have only one temperature sensor or multiple temperature sensors, and this embodiment does not specifically limit this.

[0101] Step S002: If the temperature difference between the set temperature and the indoor unit temperature is less than or equal to the first preset temperature difference threshold, and the temperature difference between the outdoor ambient temperature and / or the outdoor heat exchanger temperature and the inlet temperature is less than or equal to the second preset temperature difference threshold, then control the air conditioning equipment to enter the heating defrosting mode.

[0102] It should be noted that the first and second preset temperature difference thresholds can be determined based on the actual parameter configuration of the air conditioning equipment. In actual use, the first preset temperature difference threshold can generally be any value between 0 and 5°C, and the second preset temperature difference threshold can generally be any value between 2 and 10°C.

[0103] Understandably, if the temperature difference between the set temperature and the indoor unit temperature is less than or equal to the first preset temperature difference threshold, and the temperature difference between the outdoor ambient temperature and / or the outdoor heat exchanger temperature and the inlet temperature is less than or equal to the second preset temperature difference threshold, it indicates that the indoor heating demand is low and the outdoor frost layer is thin. In this case, it is necessary to control the air conditioning equipment to enter the heating defrosting mode to thicken the outdoor frost layer until the specified thickness is reached, and then control the air conditioning equipment to enter the normal heating mode to avoid affecting the heating effect of the air conditioning equipment due to the thin outdoor frost layer.

[0104] In one feasible implementation, after step S100, the method further includes: monitoring whether the inlet temperature of the outdoor heat exchanger is greater than a preset defrosting completion critical temperature; if so, controlling the air conditioning equipment to exit the heating defrosting mode. The preset defrosting completion critical temperature can be determined based on the actual parameter configuration of the air conditioning equipment.

[0105] Based on the first, second, and / or third embodiments described above, a fourth embodiment of the control method for the air conditioning equipment of this application is proposed. In the fourth embodiment, after the oil blockage prevention process is initiated, steps S30 to S40 are further included:

[0106] Step S30: Obtain the duration of the air conditioning device in the oil blockage prevention process;

[0107] Step S40: If the duration exceeds the preset duration, control the air conditioning device to exit the oil blockage prevention process.

[0108] It should be noted that the preset duration can be flexibly set by the user according to the actual situation, or it can be a default value. This embodiment does not impose specific limitations on this. In actual use, the preset duration can generally be any value between 10 minutes and -30 minutes.

[0109] It is understandable that when an air conditioner is in the oil-blocking prevention process, the compressor's cooling passage is generally in a state of providing heat from the compression chamber to the throttling module. Therefore, if the air conditioner is in the oil-blocking prevention process for an extended period, the compressor's cooling passage will also need to continuously provide heat from the compression chamber to the throttling module, which will affect the overheating of the air conditioner. Therefore, this embodiment limits the duration of the air conditioner in the oil-blocking prevention process to a preset time, thereby avoiding the impact on the air conditioner's heating capacity caused by prolonged oil-blocking prevention and further ensuring the heating efficiency of the air conditioner.

[0110] Based on the first, second, and / or third embodiments described above, a fifth embodiment of the control method for the air conditioning equipment of this application is proposed. In the fifth embodiment, after the oil blockage prevention process is initiated, step S50 is further included:

[0111] In step S50, if a change in the set temperature of the air conditioning equipment is detected, the air conditioning equipment is controlled to exit the oil blockage prevention process.

[0112] Understandably, if a change in the set temperature of the air conditioning unit is detected, the corresponding operating parameters of the air conditioning unit will also change accordingly. If the air conditioning unit is in the anti-oil-clogging process, this may affect the change in the corresponding operating parameters, thereby affecting the normal operation of the air conditioning unit. Therefore, this embodiment limits the air conditioning unit to exit the anti-oil-clogging process when a change in the set temperature is detected, thereby ensuring the normal operation of the air conditioning unit.

[0113] In other embodiments, the conditions for controlling the air conditioning device to exit the anti-oil blockage process may also include user shutdown, user active control of the air conditioning device to exit heating mode, or the air conditioning device displaying a fault code.

[0114] For example, to help understand the implementation flow of the control method for the air conditioning equipment obtained by combining the above embodiments, please refer to... Figure 4 , specifically:

[0115] After the air conditioning unit is turned on for heating, it first monitors whether the temperature difference between the set temperature Tset and the indoor unit temperature T1 of the air conditioning unit is less than or equal to the first preset temperature difference threshold △T1, and whether the temperature difference between the outdoor ambient temperature and / or the outdoor heat exchanger temperature Tout and the inlet temperature Tvo is less than or equal to the second preset temperature difference threshold △T2. If so, the air conditioning unit is controlled to enter the heating defrosting mode, and then the flow regulating valve is controlled to open to the defrosting opening. If the inlet temperature Tvo of the outdoor heat exchanger is monitored to be greater than the preset defrosting completion critical temperature Ths, the air conditioning unit will be controlled to exit the heating defrosting mode.

[0116] If the temperature difference between Tset and T1 is greater than ΔT1, and the temperature difference between Tout and Tvo is greater than ΔT2, the air conditioning unit is controlled to enter the normal heating mode (in the normal heating mode, the valve opening of the flow regulating valve is zero). Then, the outdoor ambient temperature and / or the outdoor heat exchanger temperature Tout are monitored to see if they are less than the preset oil blockage temperature Tm, and the air conditioning unit is monitored to see if defrosting is completed. If the outdoor ambient temperature and / or the outdoor heat exchanger temperature Tout are monitored to be less than the preset oil blockage temperature Tm, or if the air conditioning unit is monitored to have completed defrosting, the air conditioning unit is controlled to enter the heating anti-oil blockage mode (i.e., the anti-oil blockage process is started).

[0117] After the air conditioning unit enters the heating anti-oil blockage mode, if the inlet temperature Tvo of the outdoor heat exchanger is less than the first preset temperature Tdown, the valve opening of the flow control valve is adjusted to the maximum valve opening; if the inlet temperature Tvo of the outdoor heat exchanger is greater than or equal to the first preset temperature Tdown and less than or equal to the second preset temperature Tup, the valve opening of the flow control valve is adjusted to the calculated valve opening; if the inlet temperature Tvo of the outdoor heat exchanger is greater than the second preset temperature Tup, the valve opening of the flow control valve is adjusted to zero, and the air conditioning unit is controlled to return to the normal heating mode.

[0118] It should be noted that this example is only for the purpose of assisting in understanding this application and does not constitute a limitation on the control method of the air conditioning equipment of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0119] This application also provides an air conditioning device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the control method of the air conditioning device in the above embodiments.

[0120] The following is for reference. Figure 5 It shows a structural schematic diagram of an air conditioning device suitable for implementing the embodiments of this application. Figure 5 The air conditioning device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments of this application.

[0121] like Figure 5As shown, the air conditioning device may include a processing unit 101 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 102 or a program loaded from a storage device 103 into a random access memory (RAM) 104. The RAM 104 also stores various programs and data required for the operation of the air conditioning device. The processing unit 101, ROM 102, and RAM 104 are interconnected via a bus 105. An input / output (I / O) interface 106 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 106: input devices 107 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 108 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 103 including, for example, magnetic tape, hard disk, etc.; and communication devices 109. Communication device 109 allows the air conditioning unit to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows an air conditioning unit with various systems, it should be understood that it is not required to implement or possess all of the systems shown. More or fewer systems may be implemented alternatively.

[0122] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 103, or installed from ROM 102. When the computer program is executed by processing device 101, it performs the functions defined in the methods of the embodiments of this application.

[0123] The air conditioning device provided in this application embodiment, employing the control method of the air conditioning device in the above embodiments, can avoid oil blockage in the air conditioning device while ensuring the heating efficiency and compressor reliability. Compared with the prior art, the beneficial effects of the air conditioning device provided in this application embodiment are the same as the beneficial effects of the control method of the air conditioning device provided in the above embodiments, and other technical features in this air conditioning device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0124] It should be understood that various parts of the embodiments of this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0125] The above description is merely a specific implementation of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of this application should be determined by the protection scope of the above claims.

[0126] This application also provides a computer-readable storage medium storing an operating program for a smart home system that can run on a processor. The computer-readable program instructions are used to execute the control method for the air conditioning device in the above embodiments.

[0127] The computer-readable storage medium provided in this application embodiment may be, for example, a USB flash drive, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0128] The aforementioned computer-readable storage medium may be included in the air conditioning equipment; or it may exist independently and not be assembled into the air conditioning equipment.

[0129] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the air conditioning equipment, cause the air conditioning equipment to: after starting heating operation and initiating the anti-oil blockage process, control the flow regulating valve to open and obtain the inlet temperature of the outdoor heat exchanger; determine the target valve opening of the flow regulating valve based on the inlet temperature, and adjust the valve opening of the flow regulating valve to the target valve opening.

[0130] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0131] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0132] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0133] The computer-readable storage medium provided in this application embodiment stores computer-readable program instructions for executing the control method of the air conditioning equipment described above. This allows for the prevention of oil blockage in the air conditioning equipment while ensuring its heating efficiency and compressor reliability. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application embodiment are the same as those of the control method for the air conditioning equipment provided in the above embodiments, and will not be repeated here.

[0134] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning equipment as described above.

[0135] The computer program product provided in this application embodiment can prevent oil blockage in air conditioning equipment while ensuring the heating efficiency and compressor reliability. Compared with the prior art, the beneficial effects of the computer program product provided in this application embodiment are the same as those of the air conditioning equipment control method provided in the above embodiments, and will not be repeated here.

[0136] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A control method for an air conditioning device, characterized in that, The air conditioning equipment includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, a throttling module, and a flow regulating valve. The compressor includes a compression chamber and a cooling channel, which are isolated from each other. The compressor, the indoor heat exchanger, the throttling module, and the outdoor heat exchanger are connected in sequence. The flow regulating valve and the cooling channel are connected in series in a bypass flow path. One end of the bypass flow path is connected between the indoor heat exchanger and the throttling module, and the other end of the bypass flow path is connected between one end of the bypass flow path and the throttling module. The control method for the air conditioning equipment includes: After the heating operation is started and the oil blockage prevention process is initiated, the flow regulating valve is opened and the inlet temperature of the outdoor heat exchanger is obtained. Based on the inlet temperature, determine the target valve opening of the flow regulating valve, and adjust the valve opening of the flow regulating valve to the target valve opening; The step of determining the target valve opening of the flow regulating valve based on the inlet temperature includes: If the inlet temperature is less than the first preset temperature, then the target valve opening is determined to be the maximum valve opening of the flow regulating valve; If the inlet temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, then the target valve opening is determined based on the inlet temperature, the first preset temperature, the second preset temperature and the maximum valve opening. If the inlet temperature is greater than the second preset temperature, then the target valve opening is determined to be zero. The step of determining the target valve opening based on the inlet temperature, the first preset temperature, the second preset temperature, and the maximum valve opening includes: The temperature difference ratio is calculated based on the temperature difference between the second preset temperature and the inlet temperature, and the temperature difference between the second preset temperature and the first preset temperature. The target valve opening is obtained by multiplying the temperature difference ratio by the maximum valve opening.

2. The method as described in claim 1, characterized in that, The method further includes: If the outdoor ambient temperature and / or the outdoor heat exchanger temperature are monitored to be lower than the preset oil blockage temperature, or if the air conditioning equipment is monitored to have completed defrosting, the oil blockage prevention process is triggered.

3. The method as described in claim 1 or 2, characterized in that, The method further includes: If the air conditioning device is detected to be in heating and defrosting mode, the flow regulating valve is controlled to open to a preset degree.

4. The method as described in claim 3, characterized in that, The method further includes: The set temperature, indoor unit temperature, outdoor ambient temperature, and / or outdoor heat exchanger temperature of the air conditioning equipment are obtained. If the temperature difference between the set temperature and the indoor unit temperature is less than or equal to a first preset temperature difference threshold, and the temperature difference between the outdoor ambient temperature and / or the outdoor heat exchanger temperature and the inlet temperature is less than or equal to a second preset temperature difference threshold, then the air conditioning device is controlled to enter the heating defrosting mode.

5. The method as described in claim 1 or 2, characterized in that, After initiating the oil blockage prevention process, the method further includes: The duration of the air conditioning device being in the oil blockage prevention process is obtained; If the duration exceeds the preset duration, the air conditioning device is controlled to exit the oil blockage prevention process.

6. The method as described in claim 1 or 2, characterized in that, After initiating the oil blockage prevention process, the method further includes: If a change in the set temperature of the air conditioning device is detected, the air conditioning device is controlled to exit the oil blockage prevention process.

7. An air conditioning device, characterized in that, The air conditioning device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the air conditioning device as claimed in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the control method for the air conditioning device according to any one of claims 1 to 6.

Images