Oil return control method and device of air conditioner, air conditioner and storage medium

Abstract

The invention discloses an oil return control method and device of an air conditioner, the air conditioner and a storage medium, the air conditioner comprises an air conditioner outdoor unit and at least one air conditioner indoor unit, the air conditioner outdoor unit is connected with the air conditioner indoor units, and each air conditioner indoor unit comprises a side air outlet and a lower air outlet; the method comprises the steps that the current load rate of the air conditioner is determined according to indoor unit operation information of a target air conditioner indoor unit, and the target air conditioner indoor unit is the air conditioner indoor unit with the refrigeration requirement; when the current load rate is smaller than a load rate threshold value, a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit are obtained; and when the first working state and the second working state meet the preset control condition, the oil return action is executed. By means of the mode, when the air conditioner returns oil under the small load, reasonable air outlet control is matched, the blowing feeling of a user during oil return under the small load is reduced, and the comfort of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an oil return control method and device of an air conditioner, the air conditioner and a storage medium. BACKGROUND

[0002] The conventional indoor unit with only side air outlet, when the multi-split unit performs oil return, since it is suddenly running at high frequency after stable running at low frequency for a period of time, the output of cold energy of the indoor unit will suddenly become large, and the air outlet mode of side air outlet will spread the cold energy to the indoor and directly blow to the user to the maximum extent, thereby causing overcooling in the indoor and discomfort of the user. SUMMARY

[0003] The main purpose of the present application is to provide an oil return control method and device of an air conditioner, the air conditioner and a storage medium, aiming at solving the technical problem of excessive output of indoor cold energy due to sudden frequency increase of the compressor when the multi-split unit performs oil return under low load in the prior art, thereby reducing the comfort of the user.

[0004] To achieve the above-mentioned purpose, the present application provides an oil return control method of an air conditioner, which is applied to the air conditioner, and the air conditioner comprises an air conditioner outdoor unit and at least one air conditioner indoor unit, the air conditioner outdoor unit is connected with each air conditioner indoor unit respectively, and the air conditioner indoor unit comprises a side air outlet and a lower air outlet.

[0005] The oil return control method of the air conditioner comprises the following steps.

[0006] Determining a current load rate of the air conditioner according to indoor unit running information of a target air conditioner indoor unit, the target air conditioner indoor unit being an air conditioner indoor unit with a refrigeration demand;

[0007] When the current load rate is less than a load rate threshold, obtaining a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit;

[0008] When the first working state and the second working state meet a preset control condition, performing an oil return action.

[0009] In an embodiment, the step of determining the current load rate of the air conditioner according to the indoor unit running information of the target air conditioner indoor unit comprises the following steps.

[0010] Determining a current running air speed of the target air conditioner indoor unit, a current indoor temperature corresponding to the target air conditioner indoor unit and a first nominal refrigeration capacity of the target air conditioner indoor unit according to the indoor unit running information of the target air conditioner indoor unit;

[0011] Determining a demand correction coefficient according to the current running air speed and the current indoor temperature;

[0012] The load rate of the air conditioner is determined according to the demand correction coefficient, the first nominal refrigerating capacity and the installed capacity of the air conditioner.

[0013] In an embodiment, the step of determining the demand correction coefficient according to the current running air speed and the current indoor temperature comprises:

[0014] The first correction coefficient corresponding to the current running air speed is searched in an air speed correction coefficient mapping relationship, and the air speed correction coefficient mapping relationship is used to represent the correction coefficient corresponding to each running air speed.

[0015] The second correction coefficient corresponding to the current indoor temperature is searched in a temperature correction coefficient mapping relationship, and the temperature correction coefficient mapping relationship is used to represent the correction coefficient corresponding to each indoor temperature.

[0016] The demand correction coefficient is determined according to the first correction coefficient and the second correction coefficient.

[0017] In an embodiment, before the step of determining the current load rate of the air conditioner according to the demand correction coefficient, the nominal refrigerating capacity and the installed capacity of the air conditioner, the method further comprises:

[0018] The second nominal refrigerating capacities of the air conditioner indoor units are obtained.

[0019] The installed capacity of the air conditioner is determined by summing up the second nominal refrigerating capacities.

[0020] In an embodiment, before the step of performing the oil return action when the first working state and the second working state satisfy the preset control condition, the method further comprises:

[0021] When the first working state is the closed state and the second working state is the open state, it is determined that the first working state and the second working state satisfy the preset control condition.

[0022] In an embodiment, after the step of obtaining the first working state of the side air outlet of the target air conditioner indoor unit and the second working state of the lower air outlet of the target air conditioner indoor unit when the current load rate is less than the load rate threshold, the method further comprises:

[0023] When the first working state of the side air outlet is the open state and the second working state of the lower air outlet is the closed state, it is determined that the first working state and the second working state do not satisfy the preset control condition.

[0024] The side air outlet is controlled to be closed, the lower air outlet is controlled to be opened, and the oil return action is performed.

[0025] In an embodiment, after the step of determining the current load rate of the air conditioner according to the indoor unit operation information of the target air conditioner indoor unit, the method further comprises:

[0026] When the current load rate is greater than or equal to the load rate threshold, performing an oil return action.

[0027] In addition, to achieve the above-mentioned purpose, the present application also provides an oil return control device of an air conditioner, which comprises:

[0028] a processing module configured to determine a current load rate of the air conditioner according to indoor unit operation information of a target air conditioner indoor unit, the target air conditioner indoor unit being an air conditioner indoor unit with a refrigeration demand;

[0029] an obtaining module configured to, when the current load rate is less than a load rate threshold, obtain a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit;

[0030] an executing module configured to, when the first working state and the second working state meet a preset control condition, perform an oil return action.

[0031] In addition, to achieve the above-mentioned purpose, the present application also provides an air conditioner, which comprises a memory, a processor, and an oil return control program of an air conditioner stored in the memory and executable on the processor, wherein the oil return control program of the air conditioner is configured to implement the oil return control method of the air conditioner as described above.

[0032] In addition, to achieve the above-mentioned purpose, the present application also provides a storage medium, which is a computer readable storage medium, and a computer program is stored on the storage medium, wherein the computer program is executed by a processor to implement the steps of the oil return control method of the air conditioner as described above.

[0033] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to implement the steps of the oil return control method of the air conditioner as described above.

[0034] The one or more technical solutions provided in the application, the oil return control method of the air conditioner is applied to an air conditioner, the air conditioner comprises: an air conditioner outdoor unit and at least one air conditioner indoor unit, the air conditioner outdoor unit is connected with each air conditioner indoor unit respectively, and the air conditioner indoor unit comprises: a side air outlet and a lower air outlet; through the oil return control method of the air conditioner, when the air conditioner is in a small load oil return state, the reasonable air outlet control is matched, so that the phenomenon that the user is directly blown by the cold air with extremely low air outlet temperature caused by the excessive output of indoor cold energy of the traditional side air outlet indoor unit due to the sudden frequency increase of the compressor is effectively relieved, the air blowing feeling of the user is improved, and the user comfort is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0037] Figure 1 The flowchart provided for the first embodiment of the oil return control method of the air conditioner of the present application;

[0038] Figure 2 The structure and air outlet state of the indoor unit of the air conditioner of the present application are shown in the schematic diagram.

[0039] Figure 3 The air conditioner indoor unit temperature sensor setting diagram of the present application;

[0040] Figure 4 The flowchart provided for the second embodiment of the oil return control method of the air conditioner of the present application;

[0041] Figure 5 The module structure diagram of the oil return control device of the air conditioner of the present application;

[0042] Figure 6 The device structure schematic diagram of the hardware running environment involved in the oil return control method of the air conditioner in the embodiment of the present application.

[0043] Explanation of the reference numerals:

[0044] Indoor heat exchanger 21, indoor fan 22, air outlet assembly 23, first air guide assembly 24, second air guide assembly 25;

[0045] Side air outlet 201, lower air outlet 202, first switch door 231, second switch door 232.

[0046] The purposes, functional features and advantages of the present application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present application, and are not intended to limit the present application.

[0048] In order to better understand the technical solutions of the present application, the specific embodiments will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] The conventional and conventional multi-split indoor unit is in the form of side air outlet. Due to the single air outlet form, the end air flow organization is simple. When the multi-split unit performs oil return, since it is suddenly running at high frequency after stable running at low frequency for a period of time, it will cause the sudden increase of the indoor unit output cold quantity. The air outlet mode of the side air outlet will diffuse the cold quantity to the indoor and directly blow the user, thereby causing the indoor supercooling and the user discomfort.

[0050] The present application provides a solution. When the air conditioner is in small load oil return, the reasonable air outlet control is matched, thereby effectively relieving the phenomenon that the traditional side air outlet indoor unit directly blows the user due to the sudden increase of the compressor frequency when the multi-split air conditioning unit is in low load oil return, the air outlet temperature is extremely low, the cold wind is blown out, the user's blowing feeling is reduced, and the user's comfort is improved.

[0051] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as an air conditioner, an air conditioner and a fresh air device, or an electronic device, an air conditioner, etc. capable of realizing the above functions. The following will take the air conditioner as an example to explain the present embodiment and each of the following embodiments.

[0052] Based on this, the present embodiment provides an oil return control method of an air conditioner, which is described with reference to Figure 1 , Figure 1 The flowchart of the first embodiment of the oil return control method of the air conditioner of the present application.

[0053] In the present embodiment, the oil return control method of the air conditioner comprises steps S10-S30:

[0054] In the present embodiment, the control method of the air conditioner is applied to an air conditioner, and the air conditioner comprises: an air conditioner outdoor unit and at least one air conditioner indoor unit, the air conditioner outdoor unit is connected with each air conditioner indoor unit respectively, and the air conditioner indoor unit comprises: a side air outlet and a lower air outlet.

[0055] In the embodiment, the air conditioner in the embodiment refers to a multi-split air conditioner. The multi-split air conditioner is an air conditioner that connects multiple indoor units to one outdoor unit and can simultaneously adjust air temperature, humidity, cleanliness, and air flow rate in multiple rooms. The multi-split air conditioner includes but is not limited to a cooling mode, a heating mode, and a fresh air circulation mode.

[0056] It can be understood that, with reference to Figure 2 , the air conditioner includes an air conditioner indoor unit. The air conditioner indoor unit includes at least two air outlets. Different air outlets have different orientations and different air outlet wind resistances. In the embodiment, the air conditioner indoor unit includes a side air outlet and a lower air outlet. The air outlet wind resistance of the lower air outlet is greater than that of the side air outlet.

[0057] In the embodiment, the air conditioner indoor unit is a ducted air conditioner. The installation height of the air conditioner indoor unit is higher than the height of a human body.

[0058] The air conditioner indoor unit is provided with an indoor air duct. The at least two air outlets are in communication with the indoor air duct. The indoor air duct is provided with an indoor heat exchanger 21 and an indoor fan 22. The indoor fan 22 can drive indoor air to enter the indoor air duct, exchange heat with the indoor heat exchanger 21, and then be sent into the room from the at least one air outlet.

[0059] In the embodiment, the air conditioner indoor unit includes a shell. The shell includes a bottom plate and a side plate connected to the bottom plate. The bottom plate is provided with a lower air outlet 202. The side plate is provided with a side air outlet 201. The lower air outlet 202 and the side air outlet 201 are in communication with the indoor air duct.

[0060] The bottom plate is a plate body located at the bottom of the shell when the air conditioner indoor unit is installed in an indoor space. The side plate is a plate body adjacent to the bottom plate on the shell. When the air conditioner indoor unit is installed in an indoor space, the included angle (for example, 0 degrees) between the side plate and the wall of the indoor space is less than the included angle (for example, 90 degrees) between the bottom plate and the wall of the indoor space.

[0061] The air outlet surface where the lower air outlet 202 is located and the air outlet surface where the side air outlet 201 is located can be intersected (with reference to Figure 2 ). They can also be arranged without intersection. The embodiment does not limit this. Without the air guiding effect of the air guiding assembly, the air outlet direction of the lower air outlet 202 is downward (vertically downward or an included angle with the vertical direction less than or equal to 45°). The air outlet direction of the side air outlet 201 is horizontal (along the horizontal direction or an included angle with the horizontal direction less than or equal to 45°). In the embodiment, the air outlet surface where the lower air outlet 202 is located is perpendicular to the air outlet surface where the side air outlet 201 is located.

[0062] When the indoor fan 22 operates without the air guide assembly, the air resistance of the air in the indoor air duct when the air flows out of the lower air outlet 202 is greater than the air resistance of the air in the indoor air duct when the air flows out of the side air outlet 201, that is, the air volume of the lower air outlet 202 is less than the air volume of the side air outlet 201 at the same speed of the indoor fan 22. In the embodiment, the area of the lower air outlet 202 is less than the area of the side air outlet 201, and the angle between the air direction of the indoor fan 22 and the air outlet surface where the side air outlet 201 is located is greater than the angle between the air direction of the indoor fan 22 and the air outlet surface where the lower air outlet 202 is located, that is, the air direction of the indoor fan 22 is toward the side air outlet 201 and not toward the lower air outlet 202.

[0063] When the air conditioner indoor unit blows air through the lower air outlet 202, the air not only adjusts the air temperature of the indoor space but also adjusts the temperature of the enclosure of the indoor space.

[0064] In other embodiments, the at least two air outlets can also be arranged on the side of the air conditioner indoor unit, or the air directions of the at least two air outlets when the at least two air outlets are fully opened can be the same.

[0065] In the embodiment, the air conditioner indoor unit further comprises an air outlet assembly 23 arranged to adjust the air outlet state of the at least two air outlets, and the air outlet assembly 23 can adjust the opening and / or closing of each air outlet and / or adjust the air volume.

[0066] The air outlet assembly 23 can be a whole structure or composed of more than one switch door. When the air outlet assembly 23 comprises more than one switch door, the air outlets can correspond to the switch doors one by one, and each switch door can adjust the air outlet state of the corresponding air outlet; or some switch doors can adjust the air outlet state of different air outlets at the same time.

[0067] In the embodiment, the air outlet assembly 23 is arranged in the indoor air duct, and the position change of the air outlet assembly 23 can realize the cooperation of the lower air outlet 202 and the side air outlet 201 in different air outlet states:

[0068] Referring to Figure 2 , the dashed line is the air flow direction, and when the air outlet assembly 23 is in the first position state, the lower air outlet 202 and the side air outlet 201 are both opened.

[0069] In the embodiment, the air outlet assembly 23 comprises a first switch door 231 and a second switch door 232, the side air outlet 201 comprises a first air outlet area and a second air outlet area, the first switch door 231 is arranged to adjust the air volume of the first air outlet area, and the second switch door 232 is arranged to adjust the air volume of the second air outlet area and the lower air outlet 202.

[0070] In the embodiment, the first air outlet area is an upper air outlet area away from the lower air outlet 202, the second air outlet area is a lower air outlet area close to the lower air outlet 202, the first switch door 231 is rotatably installed on the upper side of the side air outlet 201 to adjust the air volume of the upper air outlet area, and the second switch door 232 is rotatably installed at the abutting position between the lower air outlet 202 and the side air outlet 201, and the second switch door 232 can simultaneously adjust the air volume of the lower air outlet area and the lower air outlet 202 when rotating.

[0071] With reference to Figure 2 , the first position state includes that the first switch door 231 is in the first position and the second switch door 232 is in the second position, the second switch door 232 simultaneously opens the second air outlet area and the lower air outlet 202 in the second position, and at this time, the side air outlet 201 is fully opened. The first switch door 231 and the second switch door 232 cooperate to open the lower air outlet 202 and the side air outlet 201, and the air outlet of the indoor fan 22 is blown into the indoor room from the lower air outlet 202 and the side air outlet 201 under the cooperative guiding action of the first switch door 231 and the second switch door 232.

[0072] In other embodiments, the air outlet assembly 23 can also include a third switch door rotatably installed between the lower air outlet 202 and the side air outlet 201, and the third switch door can be switched between a first operating position, a second operating position and a third operating position. The first operating position is a position of closing the lower air outlet 202 and opening the side air outlet 201, the second operating position is a position of closing the side air outlet 201 and opening the lower air outlet 202, and the third operating position is a position of simultaneously opening the lower air outlet 202 and the side air outlet 201 between the lower air outlet 202 and the side air outlet 201.

[0073] In an embodiment, the air conditioner indoor unit can further include a first air guide assembly 24, which can be arranged at the lower air outlet 202 and located outside the indoor air duct, and the first air guide assembly 24 can be installed on the shell.

[0074] The first air guide assembly 24 can open or close the lower air outlet 202, and adjust the air direction of the lower air outlet 202 when the lower air outlet 202 is opened.

[0075] In an embodiment, the air conditioner indoor unit can further include a second air guide assembly 25, which can be arranged at the side air outlet 201 and located outside the indoor air duct, and the second air guide assembly 25 can be installed on the shell.

[0076] The second air guide assembly 25 can open or close the side air outlet 201, and adjust the air direction of the side air outlet 201 when the side air outlet 201 is opened.

[0077] In one embodiment, the air conditioner includes a refrigerant circulation circuit, which includes the above-mentioned air conditioner indoor unit, a throttling device, an outdoor heat exchanger, a reversing component and a compressor, and the compressor is connected to the air conditioner indoor unit.

[0078] The exhaust port of the compressor, the return air port of the compressor, the outdoor heat exchanger and the indoor heat exchanger 21 are all connected to the reversing component. The reversing component has a first operating state and a second operating state. When the reversing component operates in the first operating state, the exhaust port is connected to the outdoor heat exchanger and the return air port is connected to the indoor heat exchanger 21. When the reversing component operates in the second operating state, the exhaust port is connected to the indoor heat exchanger 21 and the return air port is connected to the outdoor heat exchanger.

[0079] The air conditioner indoor unit further includes a first temperature sensor (not shown), which can be disposed in the indoor air duct and located on the air outlet side of the indoor fan 22 to detect the air outlet temperature of the air conditioner indoor unit.

[0080] The air conditioner indoor unit further includes a second temperature sensor (not shown), which can be disposed on the coil of the indoor heat exchanger 21 to detect the temperature of the indoor heat exchanger 21 .

[0081] like Figure 3 As shown, for example, the indoor unit 1 includes a side air outlet and a lower air outlet. A plurality of temperature sensing packages are provided in the indoor unit to detect the temperature of each component in the indoor unit, including a T2B temperature sensing package, a T2 temperature sensing package, and an air outlet temperature sensing package. The T2 temperature sensing package is placed in the middle of the evaporator, the T2B temperature sensing package is placed at the evaporator outlet in the cooling flow direction, and the air outlet temperature sensing package is placed at the intersection of the side air outlet and the lower air outlet.

[0082] Step S10: determining the current load rate of the air conditioner according to the indoor unit operation information of the target air conditioner indoor unit, wherein the target air conditioner indoor unit is an air conditioner indoor unit with cooling demand.

[0083] It should be noted that the target air-conditioning indoor unit refers to the air-conditioning indoor unit in the air conditioner that has cooling demand. The indoor unit operating information includes but is not limited to the current indoor temperature of the environment in which the target air-conditioning indoor unit is located, the first nominal cooling capacity of the target air-conditioning indoor unit, and the current operating wind speed of the target air-conditioning indoor unit and other operating information.

[0084] It will be appreciated that a load factor calculation can be performed based on the target air conditioner's indoor unit operating information and the installed capacity of the air conditioner's outdoor unit to determine the load factors of all air conditioner indoor units currently experiencing cooling demand. In this embodiment, the current load factor LR of the air conditioner refers to the load factors of all air conditioner indoor units currently experiencing cooling demand.

[0085] It should be noted that in a possible implementation, after the step S10, the method can further include: if the current load rate LR is greater than or equal to the set load rate threshold LR_low, if yes, directly responding to the oil return instruction, and performing the oil return action, at this time, there is no need to adjust the working states of the side air outlet and the lower air outlet of the target air conditioner indoor unit.

[0086] Step S20: When the current load rate is less than the load rate threshold, obtaining a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit.

[0087] It should be noted that when the current load rate LR is less than the load rate threshold LR_low, it indicates that the air conditioner is in a low load operation at this time, and if the oil return action is directly performed when the side air outlet of the target air conditioner indoor unit is in the open state, it will cause the indoor coldness to be excessively output, and the cold air with extremely low outlet temperature is blown out, causing the user to be directly blown and uncomfortable. Therefore, when the current load rate LR is less than the load rate threshold LR_low, the first working state of the side air outlet of the target air conditioner indoor unit and the second working state of the lower air outlet of the target air conditioner indoor unit need to be obtained. In this embodiment, the working state of the air outlet includes an open state and a closed state.

[0088] In a possible implementation, after the step S20, the method can further include steps A11-A12:

[0089] Step A11: When the first working state of the side air outlet is in the open state and the second working state of the lower air outlet is in the closed state, it is determined that the first working state and the second working state do not satisfy a preset control condition.

[0090] Step A12: controlling the side air outlet to be closed, and controlling the lower air outlet to be opened, and performing the oil return action.

[0091] It should be noted that the preset control condition refers to that the first working state of all side air outlets of the target air conditioner indoor unit is in the closed state and the second working state of all lower air outlets of the target air conditioner indoor unit is in the open state.

[0092] It can be understood that, in all air conditioners with a refrigeration demand, if the first working state of the side air outlet of any one target air conditioner indoor unit is an open state and the second working state of the lower air outlet is a closed state, it indicates that the first working state and the second working state of the target air conditioner indoor unit do not satisfy the preset control condition. At this time, in the case that the current load rate LR is less than the load rate threshold LR_low, the side air outlet of the target air conditioner indoor unit needs to be controlled to be closed, the lower air outlet is controlled to be opened, and when the air outlet mode of all target air conditioner indoor units is only through the lower air outlet, the oil return action is performed. In this embodiment, after the oil return action is completed, the air outlet mode of all target air conditioner indoor units is restored, the side air outlet closed before the oil return action is performed is opened, and the lower air outlet opened before the oil return action is performed is closed.

[0093] In a specific implementation, in all air conditioners with a refrigeration demand, if the first working state of the side air outlet of any one target air conditioner indoor unit is an open state and the second working state of the lower air outlet is also an open state, it indicates that the first working state and the second working state of the target air conditioner indoor unit do not satisfy the preset control condition. At this time, in the case that the current load rate LR is less than the load rate threshold LR_low, the side air outlet of the target air conditioner indoor unit needs to be controlled to be closed, and the lower air outlet is kept open, and when the air outlet mode of all target air conditioner indoor units is only through the lower air outlet, the oil return action is performed. In this embodiment, after the oil return action is completed, the air outlet mode of all target air conditioner indoor units is restored, and the side air outlet closed before the oil return action is performed is opened.

[0094] In this embodiment, for the air conditioner indoor unit with integrated side air outlet and lower air outlet, during refrigeration operation, on the one hand, in terms of output cooling capacity: under the same fan speed, the side air outlet has a large area and outputs a large cooling capacity, if the air is output from the side air outlet, the output cooling capacity is the largest; if the lower air outlet and the side air outlet output air at the same time, the same air volume is shared by the two air outlets in the vertical direction, the air pressure becomes smaller, and the output cooling capacity is reduced; if the air is output from the lower air outlet, the output cooling capacity is further reduced because the area of the lower air outlet is smaller than that of the side air outlet. Therefore, the output cooling capacity is: only side air outlet > side air outlet + lower air outlet > only lower air outlet; on the other hand, in terms of air flow organization, the lower air outlet can effectively avoid cold air direct blowing compared with the side air outlet, reduce the user's blowing feeling, and improve user comfort.

[0095] Step S30: performing an oil return action when the first working state and the second working state satisfy the preset control condition.

[0096] In a feasible implementation, before the step S30, the method can further include: determining that the first working state of the side air outlet and the second working state of the lower air outlet meet a preset control condition when the first working state of the side air outlet of all target air conditioner indoor units is in a closed state and the second working state of the lower air outlet of all target air conditioner indoor units is in an open state, and performing the oil return action at this time.

[0097] In the embodiment, through the above manner, when the air conditioner is in a small load oil return, the reasonable air outlet control is matched, so that the phenomenon that the user is directly blown by the cold air with extremely low air outlet temperature due to the excessive output of indoor cold energy caused by the sudden frequency increase of the compressor of the traditional side air outlet indoor unit when the multi-connected air conditioner unit is in a low load oil return is effectively relieved, the blowing feeling of the user is reduced, and the user comfort is improved.

[0098] Based on the first embodiment of the application, in the second embodiment of the application, the same or similar contents as the above embodiment one can be referred to the above description, and will not be described in detail. On this basis, please refer to Figure 4 , the step S10 includes steps S11-S13:

[0099] Step S11: determining the current running wind speed of the target air conditioner indoor unit, the current indoor temperature corresponding to the target air conditioner indoor unit, and the first nominal refrigerating capacity of the target air conditioner indoor unit according to the indoor unit running information of the target air conditioner indoor unit.

[0100] It should be noted that the current indoor temperature corresponding to the target air conditioner indoor unit refers to the indoor temperature of the environment where the target air conditioner indoor unit is located, and the first nominal refrigerating capacity refers to the maximum air conditioning output capacity that the target air conditioner indoor unit can provide under standard test conditions.

[0101] Step S12: determining the demand correction coefficient according to the current running wind speed and the current indoor temperature.

[0102] It should be noted that the demand correction coefficient K includes a first correction coefficient k1 and a second correction coefficient k2, the first correction coefficient is a load demand correction coefficient determined according to the current running wind speed, and the second correction coefficient is a load demand correction coefficient determined according to the current indoor temperature, and the value range of k1 and k2 is between 0.6 and 1.2.

[0103] In an implementable embodiment, the step S12 can further include: searching for a first correction coefficient corresponding to a current operating wind speed in a wind speed coefficient mapping relationship for representing correction coefficients corresponding to operating wind speeds, and the correction coefficient increases with the operating wind speed; searching for a second correction coefficient corresponding to a current indoor temperature in a temperature coefficient mapping relationship for representing correction coefficients corresponding to indoor temperatures, and the correction coefficient increases with the indoor temperature; and determining the demand correction coefficient after searching for the first correction coefficient k1 and the second correction coefficient k2. In this embodiment, the demand correction coefficient K=k1×k2.

[0104] Step S13: performing load rate calculation according to the demand correction coefficient, the first nominal refrigerating capacity, and the installed capacity of the air conditioner to determine a current load rate of the air conditioner.

[0105] It should be noted that the current load rate LR=first nominal refrigerating capacity×demand correction coefficient / installed capacity of the air conditioner is obtained by performing load rate calculation according to the demand correction coefficient, the first nominal refrigerating capacity, and the installed capacity of the target air conditioner indoor unit. When there are multiple target air conditioner indoor units, the current load rate LR=Σ(first nominal refrigerating capacity×demand correction coefficient) / installed capacity of the air conditioner. wherein n is the number of target air conditioner indoor units, and i is the index number of the target air conditioner indoor unit.

[0106] In an implementable embodiment, the step S13 can further include: obtaining second nominal refrigerating capacities of all air conditioner indoor units connected to the air conditioner outdoor unit, and calculating a sum of all the second nominal refrigerating capacities to obtain the installed capacity of the air conditioner.

[0107] In this embodiment, the current operating wind speed of the target air conditioner indoor unit, the current indoor temperature corresponding to the target air conditioner indoor unit, and the first nominal refrigerating capacity of the target air conditioner indoor unit are determined according to the indoor unit operating information of the target air conditioner indoor unit; the demand correction coefficient is determined according to the current operating wind speed and the current indoor temperature; and the current load rate of the air conditioner is determined by performing load rate calculation according to the demand correction coefficient, the first nominal refrigerating capacity, and the installed capacity of the air conditioner. In this way, the accuracy of the load rate calculation is ensured.

[0108] It should be noted that the above examples are only used for understanding the present application and do not limit the oil return control method of the air conditioner of the present application. More forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0109] The present application also provides an oil return control device of an air conditioner, which will be described below with reference to Figure 5 The oil return control device of the air conditioner includes:

[0110] The processing module 10 is configured to determine a current load rate of the air conditioner according to indoor unit operation information of a target air conditioner indoor unit, the target air conditioner indoor unit being an air conditioner indoor unit having a refrigeration demand.

[0111] The obtaining module 20 is configured to obtain a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit when the current load rate is less than a load rate threshold.

[0112] The execution module 30 is configured to perform an oil return action when the first working state and the second working state satisfy a preset control condition.

[0113] In an embodiment, the processing module 10 is further configured to determine a current operation air speed of the target air conditioner indoor unit, a current indoor temperature corresponding to the target air conditioner indoor unit, and a first nominal refrigeration capacity of the target air conditioner indoor unit according to the indoor unit operation information of the target air conditioner indoor unit; determine a demand correction coefficient according to the current operation air speed and the current indoor temperature; and determine the current load rate of the air conditioner by load rate calculation according to the demand correction coefficient, the first nominal refrigeration capacity, and an installed capacity of the air conditioner.

[0114] In an embodiment, the processing module 10 is further configured to find a first correction coefficient corresponding to the current operation air speed in an air speed coefficient mapping relationship, the air speed coefficient mapping relationship being used to represent correction coefficients corresponding to respective operation air speeds; find a second correction coefficient corresponding to the current indoor temperature in a temperature coefficient mapping relationship, the temperature coefficient mapping relationship being used to represent correction coefficients corresponding to respective indoor temperatures; and determine the demand correction coefficient according to the first correction coefficient and the second correction coefficient.

[0115] In an embodiment, the processing module 10 is further configured to obtain second nominal refrigeration capacities of respective air conditioner indoor units; and determine the installed capacity of the air conditioner by summation calculation according to the respective second nominal refrigeration capacities.

[0116] In an embodiment, the execution module 30 is further configured to determine that the first working state and the second working state satisfy the preset control condition when the first working state is a closed state and the second working state is an open state.

[0117] In an embodiment, the obtaining module 20 is further configured to determine that the first working state and the second working state do not satisfy the preset control condition when the first working state of the side air outlet is an open state and the second working state of the lower air outlet is a closed state; control the side air outlet to be closed and the lower air outlet to be open; and perform the oil return action.

[0118] In an embodiment, the processing module 10 is further configured to perform an oil return action when the current load rate is greater than or equal to a load rate threshold.

[0119] In the embodiment, the current load rate of the air conditioner is determined according to the indoor unit operation information of a target air conditioner indoor unit, the target air conditioner indoor unit being an air conditioner indoor unit having a refrigeration demand; when the current load rate is less than a load rate threshold, a first working state of a side air outlet of the target air conditioner indoor unit and a second working state of a lower air outlet of the target air conditioner indoor unit are obtained; and when the first working state and the second working state satisfy a preset control condition, an oil return action is performed. In this way, when the air conditioner is in a small load oil return state, the air conditioner is matched with reasonable air outlet control, thereby effectively alleviating the phenomenon that, when a multi-split air conditioner unit is in a low load oil return state, the indoor cooling capacity is excessively output due to sudden compressor frequency increase of a traditional side air outlet indoor unit, the extremely low temperature air is blown out to cause a direct blowing discomfort to a user, the air blowing feeling of the user is reduced, and the user comfort is improved.

[0120] The oil return control device of the air conditioner provided in the application adopts the oil return control method of the air conditioner in the above embodiment, and can solve the technical problem in the prior art that, when a multi-split air conditioner is in a low load oil return state, the indoor cooling capacity is excessively output due to sudden compressor frequency increase, thereby reducing the user comfort. Compared with the prior art, the oil return control device of the air conditioner provided in the application has the same beneficial effects as the oil return control method of the air conditioner provided in the above embodiment, and other technical features in the oil return control device of the air conditioner are the same as the features disclosed in the above embodiment, which will not be described herein.

[0121] The application provides an air conditioner, which comprises at least one processor and a memory connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the oil return control method of the air conditioner in the above embodiment.

[0122] Reference will now be made to the following description Figure 6 which shows a structural diagram of an air conditioner suitable for implementing the embodiments of the application. The air conditioner in the embodiments of the application can include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (for example, vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 6The illustrated air conditioner is merely an example and should not bring any limitation to the function and use range of the embodiments of the present application.

[0123] As shown in Figure 6 The air conditioner can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. In the RAM 1004, various programs and data required for operation of the air conditioner are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the air conditioner to communicate with other devices wirelessly or by wire to exchange data. Although the air conditioner with various systems is shown in the figure, it should be understood that all the illustrated systems are not required to be implemented or provided. More or less systems can be alternatively implemented or provided.

[0124] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program codes for executing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by the communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of the embodiments disclosed in the present application are performed.

[0125] The air conditioner provided in the present application adopts the oil return control method of the air conditioner in the above embodiment, and can solve the technical problem of excessive indoor cooling capacity output due to sudden frequency increase of the compressor during low load oil return of the multi-split air conditioner in the prior art, thereby reducing user comfort. Compared with the prior art, the air conditioner provided in the present application has the same beneficial effects as the oil return control method of the air conditioner provided in the above embodiment, and other technical features in the air conditioner are the same as the features disclosed in the above embodiment method, which will not be described here.

[0126] It should be understood that parts of the present application can be realized by 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 one or more embodiments or examples in a suitable manner.

[0127] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0128] The present application provides a computer readable storage medium having computer readable program instructions (i.e. computer programs) stored thereon, the computer readable program instructions being used to execute the oil return control method of the air conditioner in the above embodiment.

[0129] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores 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 appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0130] The computer-readable storage medium may be included in the air conditioner, or may exist independently without being assembled into the air conditioner.

[0131] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the air conditioner, the air conditioner: determines the current load rate of the air conditioner based on the indoor unit operation information of the target air conditioner, and the target air conditioner is an air conditioner with cooling demand; when the current load rate is less than the load rate threshold, obtains the first working state of the side air outlet of the target air conditioner and the second working state of the lower air outlet of the target air conditioner; when the first working state and the second working state meet the preset control conditions, performs the oil return action.

[0132] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0133] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0134] The modules involved in the embodiments of the present application can be implemented in software or hardware. In some cases, the names of the modules do not limit the modules themselves.

[0135] The computer readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer program) for executing the oil return control method of the air conditioner. The technical problem of excessive indoor cooling output caused by sudden frequency increase of the compressor during low load oil return of the multi-split air conditioner in the prior art, thereby reducing user comfort, can be solved. Compared with the prior art, the beneficial effects of the computer readable storage medium provided by the present application are the same as those of the oil return control method of the air conditioner provided by the above-mentioned embodiments, which will not be repeated here.

[0136] The application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the oil return control method of the air conditioner as described above.

[0137] The computer program product provided by the application can solve the technical problem in the prior art that when the multi-split air conditioner is in low load oil return, the indoor cold output is excessively high due to the sudden frequency increase of the compressor, thereby reducing the user comfort. Compared with the prior art, the beneficial effects of the computer program product provided by the application are the same as those of the oil return control method of the air conditioner provided by the above-mentioned embodiments, and are not described here.

[0138] The above only describes some embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made by using the content of the specification and drawings, or direct / indirect application in other related technical fields within the technical concept of the application is included in the patent protection scope of the application.

Claims

1. An oil return control method for an air conditioner, characterized in that: The oil return control method of the air conditioner is applied to an air conditioner, the air conditioner comprising: an air conditioner outdoor unit and at least one air conditioner indoor unit, the air conditioner outdoor unit is connected to each air conditioner indoor unit, the air conditioner indoor unit comprises: a side air outlet and a bottom air outlet; The oil return control method of the air conditioner comprises: determining a current load rate of the air conditioner based on operating information of a target air conditioner indoor unit, wherein the target air conditioner indoor unit is an air conditioner indoor unit with cooling demand; When the current load rate is less than a load rate threshold, obtaining a first operating state of a side air outlet of the target air conditioner indoor unit and a second operating state of a lower air outlet of the target air conditioner indoor unit; When the first working state and the second working state meet the preset control conditions, the oil return action is performed.

2. The method according to claim 1, wherein The step of determining the current load rate of the air conditioner according to the indoor unit operation information of the target air conditioner comprises: determining, based on the target air conditioner indoor unit operation information, a current operating wind speed of the target air conditioner indoor unit, a current indoor temperature corresponding to the target air conditioner indoor unit, and a first nominal cooling capacity of the target air conditioner indoor unit; determining a demand correction coefficient according to the current operating wind speed and the current indoor temperature; A load rate calculation is performed based on the demand correction coefficient, the first nominal cooling capacity, and the installed capacity of the air conditioner to determine a current load rate of the air conditioner.

3. The method according to claim 2, wherein The step of determining the demand correction coefficient according to the current operating wind speed and the current indoor temperature includes: Searching for a first correction coefficient corresponding to the current operating wind speed in a wind speed coefficient mapping relationship, wherein the wind speed coefficient mapping relationship is used to characterize the correction coefficients corresponding to each operating wind speed; searching for a second correction coefficient corresponding to the current indoor temperature in the temperature coefficient mapping relationship, wherein the temperature coefficient mapping relationship is used to represent the correction coefficient corresponding to each indoor temperature; A demand correction coefficient is determined according to the first correction coefficient and the second correction coefficient.

4. The method according to claim 2, wherein Before the step of calculating the load rate according to the demand correction coefficient, the nominal cooling capacity, and the installed capacity of the air conditioner to determine the current load rate of the air conditioner, the method further includes: Obtaining the second nominal cooling capacity of each indoor unit of the air conditioner; The installed capacity of the air conditioner is determined by performing a summation calculation based on the second nominal cooling capacities.

5. The method according to any one of claims 1 to 4, characterized in that Before the step of executing the oil return action when the first working state and the second working state meet the preset control conditions, the step includes: When the first working state is the off state and the second working state is the on state, it is determined that the first working state and the second working state meet a preset control condition.

6. The method according to any one of claims 1 to 4, characterized in that After the step of obtaining the first operating state of the side air outlet of the target air conditioner indoor unit and the second operating state of the lower air outlet of the target air conditioner indoor unit when the current load rate is less than the load rate threshold, the method further includes: When the first working state of the side air outlet is an open state and the second working state of the lower air outlet is a closed state, determining that the first working state and the second working state do not meet the preset control condition; The side air outlet is controlled to be closed, the lower air outlet is controlled to be opened, and the oil return action is performed.

7. The method according to any one of claims 1 to 4, characterized in that After the step of determining the current load rate of the air conditioner according to the indoor unit operation information of the target air conditioner, the method further includes: When the current load rate is greater than or equal to the load rate threshold, the oil return action is performed.

8. An oil return control device for an air conditioner, characterized in that: The oil return control device of the air conditioner comprises: a processing module, configured to determine a current load rate of the air conditioner based on operating information of a target air conditioner indoor unit, wherein the target air conditioner indoor unit is an air conditioner indoor unit with a cooling demand; an acquisition module, configured to acquire a first operating state of a side air outlet of the target air conditioner indoor unit and a second operating state of a lower air outlet of the target air conditioner indoor unit when the current load rate is less than a load rate threshold; The execution module is used to execute the oil return action when the first working state and the second working state meet the preset control conditions.

9. An air conditioner, characterized in that: The air conditioner includes: a memory, a processor, and an oil return control program of the air conditioner stored in the memory and executable on the processor, wherein the oil return control program of the air conditioner is configured to implement the oil return control method of the air conditioner according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores an oil return control program for the air conditioner, and when the oil return control program for the air conditioner is executed by the processor, the oil return control method for the air conditioner according to any one of claims 1 to 7 is implemented.

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