Air conditioner control method and device, air conditioner and storage medium

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device, an air conditioner and a storage medium. According to the method, the communication state of the throttling element, the balance electromagnetic valve and the four-way valve in the air conditioner is adjusted by judging the operation mode before the air conditioner is shut down and the operation parameters before the compressor is shut down in combination with the outdoor environment temperature, so that the refrigerant pressure and the refrigerant flow direction in the refrigerant pipeline are controlled; the compressor is prevented from being pressed to rotate reversely due to the fact that the pressure difference value between the exhaust port and the air suction port of the compressor is too large, and the technical problem that in the prior art, an air conditioner stops under the condition that the pressure difference is large or the oil temperature is insufficient, and consequently the compressor rotates reversely is solved.

Description

Technical Field

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

[0002] If the compressor in an air conditioner starts up in a short time and then stops when the pressure difference is large or the oil temperature is insufficient, the compressor will reverse. This will cause the lubricating oil in the compressor oil sump to be quickly drawn back into the gas-liquid separator, affecting the compressor's service life and operating performance.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a control method, device, air conditioner, and storage medium for an air conditioner, aiming to solve the technical problem in the prior art where the air conditioner shuts down when the pressure difference is large or the oil temperature is insufficient, which causes the compressor to reverse.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, the air conditioner including a heat pump circuit and an enthalpy-increasing circuit, the heat pump circuit including an outdoor unit and an indoor unit, the outdoor unit including a compressor, a four-way valve, a gas-liquid separator, a throttling element, a first outdoor heat exchanger and a second outdoor heat exchanger, a balancing solenoid valve being provided between the exhaust port of the compressor and the gas-liquid separator, the indoor unit including at least one indoor heat exchanger, one end of the enthalpy-increasing circuit being connected to the second outdoor heat exchanger and the other end being connected to the enthalpy injection port of the compressor;

[0006] The method includes the following steps:

[0007] When the air conditioner receives a shutdown command during operation, it acquires the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner.

[0008] Control the compressor to stop; and

[0009] Adjust the connection status of at least one of the following components—the throttling element, the balancing solenoid valve, and the four-way valve—based on the current operating mode, the current operating parameters, and the outdoor ambient temperature.

[0010] Optionally, the current operating parameters include at least the continuous operating time of the compressor;

[0011] Adjusting the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature includes:

[0012] When the current operating mode is heating mode, determine the temperature range of the outdoor ambient temperature and the duration range of the continuous operation; and

[0013] When the outdoor ambient temperature is less than a first temperature threshold and the continuous operating time is less than a preset time, the connection status of the balancing solenoid valve, the throttling element and the four-way valve are adjusted at intervals of a first time.

[0014] Optionally, adjusting the connection state of the balancing solenoid valve, the throttling element, and the four-way valve includes:

[0015] Open the balancing solenoid valve and adjust the opening of the throttling element to its maximum opening; and

[0016] At a second time interval, the connection state of the four-way valve is switched, where the second time interval is longer than the second time interval.

[0017] Optionally, after determining whether the outdoor ambient temperature is less than a first temperature threshold and whether the continuous running time is less than a preset duration, the method further includes:

[0018] When the outdoor ambient temperature is greater than or equal to a first temperature threshold, or when the continuous operating time is greater than or equal to a preset time, the connection state of the balancing solenoid valve and the throttling element is adjusted at intervals of a first time.

[0019] Determine the operating status of the air conditioner; and

[0020] When the air conditioner is in the temperature-reaching shutdown state, the connection state of the four-way valve is adjusted after a third time interval.

[0021] Optionally, determining the operating status of the air conditioner includes:

[0022] The system obtains the indoor ambient temperature of the area where the indoor unit of the air conditioner is located and the set temperature of the air conditioner; and...

[0023] When the temperature difference between the indoor ambient temperature and the set temperature is less than the preset temperature difference value, the air conditioner is determined to be in the temperature-reached shutdown state.

[0024] Optionally, the current operating parameters also include the exhaust temperature at the compressor's exhaust port;

[0025] The method of adjusting the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature further includes:

[0026] When the current operating mode is cooling mode, it is determined whether the outdoor ambient temperature is lower than a second temperature, and whether the exhaust temperature is lower than a third temperature, wherein the third temperature is higher than the second temperature; and

[0027] When the outdoor ambient temperature is lower than the second temperature and the exhaust temperature is lower than the third temperature, the balancing solenoid valve is opened at a fourth time interval.

[0028] Optionally, the control method for the air conditioner further includes:

[0029] When the outdoor ambient temperature is greater than or equal to the second temperature, or the exhaust temperature is greater than or equal to the third temperature, the balancing solenoid valve is opened at a fifth time interval, wherein the fifth time interval is greater than the fourth time interval.

[0030] Furthermore, to achieve the above objectives, the present invention also proposes a control device for an air conditioner, the control device comprising:

[0031] The acquisition module is used to acquire the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner when the air conditioner receives a shutdown command during operation.

[0032] A shutdown module is used to control the compressor to stop; and

[0033] The adjustment module is used to adjust the connection state of at least one of the following components: the throttling element, the balancing solenoid valve, and the four-way valve, according to the current operating mode, the current operating parameters, and the outdoor ambient temperature.

[0034] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, the control program being configured to implement the steps of the control method for the air conditioner as described above.

[0035] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a control program for an air conditioner, wherein the control program for the air conditioner, when executed by a processor, implements the steps of the control method for the air conditioner as described above.

[0036] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0037] The present invention provides one or more technical solutions that have at least the following technical effects: When the air conditioner receives a shutdown command during operation, the present invention obtains the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner; controls the compressor to stop; and adjusts the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature. By judging the operating mode of the air conditioner before shutdown and the operating parameters of the compressor before shutdown, combined with the outdoor ambient temperature, the connection state of the throttling element, the balancing solenoid valve, and the four-way valve in the air conditioner is adjusted to control the refrigerant pressure and refrigerant flow direction in the refrigerant pipeline, so as to avoid the compressor reversing due to excessive pressure difference between the compressor's exhaust port and intake port. This solves the technical problem in the prior art where the compressor reverses when the air conditioner stops under conditions of large pressure difference or insufficient oil temperature. Attached Figure Description

[0038] 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.

[0039] 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.

[0040] Figure 1 This is a flowchart illustrating the first embodiment of the control method for an air conditioner according to the present invention;

[0041] Figure 2 This is a schematic diagram of the air conditioner architecture according to an embodiment of the control method of the air conditioner of the present invention;

[0042] Figure 3 This is a flowchart illustrating the second embodiment of the control method for an air conditioner according to the present invention;

[0043] Figure 4 This is a flowchart illustrating the third embodiment of the control method for an air conditioner according to the present invention;

[0044] Figure 5 This is a structural block diagram of the first embodiment of the control device for the air conditioner of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of an air conditioner in the hardware operating environment involved in the embodiments of the present invention.

[0046] Explanation of icon numbers:

[0047] label name label name A1 compressor A2 Four-way valve A3 gas-liquid separator A4 Throttling element A5 First outdoor heat exchanger A6 Second outdoor heat exchanger A7 Balanced solenoid valve B1 Indoor heat exchanger

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] The main solution of this application embodiment is: when the air conditioner receives a shutdown command during operation, it obtains the current operating parameters of the compressor, the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, and the current operating mode of the air conditioner; controls the compressor to stop; and adjusts the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature.

[0052] In this embodiment, for ease of description, the controller that identifies the air conditioner will be used as the execution subject in the following description.

[0053] In existing technologies, to prevent the compressor from reversing and causing lubricating oil to be drawn back into the gas-liquid separator, the amount of oil drawn back into the gas separator is generally reduced by decreasing the oil return port of the compressor. However, when the reversal is rapid, lubricating oil will still be sprayed out from the suction pipe. This cannot fundamentally solve the technical problem that the compressor will reverse when the air conditioner stops due to a large pressure difference or insufficient oil temperature.

[0054] This application provides a solution that, by determining the operating mode of the air conditioner before it stops and the operating parameters of the compressor before it stops, and combining this with the outdoor ambient temperature, adjusts the connection status of the throttling element, the balancing solenoid valve, and the four-way valve in the air conditioner to control the refrigerant pressure and refrigerant flow in the refrigerant pipeline. This avoids excessive pressure difference between the compressor's exhaust port and intake port, which could cause the compressor to reverse under pressure, and prevents the lubricating oil in the compressor from being drawn back into the gas-liquid separator.

[0055] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as an air conditioner controller. The following description uses the control of an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0056] Based on this, embodiments of the present invention provide a control method for an air conditioner, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of a control method for an air conditioner according to the present invention.

[0057] In this embodiment, the control method for the air conditioner includes:

[0058] Step S10: When the air conditioner receives a shutdown command during operation, obtain the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner.

[0059] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as an air conditioner controller or control chip. The following description uses an air conditioner controller as an example to illustrate this embodiment and the subsequent embodiments.

[0060] If the compressor is running, it will be affected by the compressor rotor. Even if there is a pressure difference between the compressor's discharge port and suction port, it will be much smaller than the output pressure generated by the compressor's operation, and there will be no reverse rotation. However, if the compressor has a short start-up time, the refrigerant pipeline of the entire air conditioner has not established a relatively stable pressure environment. If the compressor stops at this time, there will be a pressure difference between the compressor's discharge port and suction port. If the oil viscosity in the pipeline is low at this time, it may cause the compressor to reverse, which will lead to oil migration. The rotor reverse rotation will accelerate the oil pump's oil sump.

[0061] It should be noted that the reference Figure 2 The air conditioner includes a heat pump circuit and an enthalpy-increasing circuit. The heat pump circuit includes an outdoor unit and an indoor unit. The outdoor unit includes a compressor A1, a four-way valve A2, a gas-liquid separator A3, a throttling element A4, a first outdoor heat exchanger A5, and a second outdoor heat exchanger A6. A balancing solenoid valve is also provided between the exhaust port of the compressor and the gas-liquid separator. The indoor unit includes at least one indoor heat exchanger B1. One end of the enthalpy-increasing circuit is connected to the second outdoor heat exchanger, and the other end is connected to the enthalpy injection port of the compressor.

[0062] In this embodiment, the second outdoor heat exchanger A6 can be configured as a plate heat exchanger, which is mainly used to improve the heat exchange efficiency of the refrigerant in the pipeline, thereby improving the heat exchange efficiency of the enthalpy-increasing loop.

[0063] Furthermore, a one-way valve can be installed at the discharge port of compressor A1, allowing refrigerant to be transferred from the compressor discharge port to the four-way valve A2 via the one-way valve. In the event of compressor reversal, this can also prevent the high-temperature and high-pressure refrigerant from flowing back into the condenser and reduce the refrigerant pressure at the compressor discharge port.

[0064] The balancing solenoid valve A7 is connected at one end to the suction port of compressor A1 and at the other end to the discharge port of compressor A1. It is mainly used to balance the pressure at the suction port and the discharge port after the compressor stops, so as to avoid pressure imbalance and cause the compressor to reverse.

[0065] Understandably, the current operating parameters of the compressor include at least the continuous operating time of the compressor before shutdown and the discharge temperature at the compressor discharge port. Since the compressor discharge port carries out some high-temperature lubricating oil when it discharges, and the two temperatures are similar, the discharge temperature is used to simulate the lubricating oil temperature in order to assess the oil viscosity of the lubricating oil in the pipeline before shutdown, and then determine whether a strategy to prevent backflow of lubricating oil is needed.

[0066] The outdoor ambient temperature of the area where the air conditioner outdoor unit is located can be measured by a temperature sensor or temperature detection device installed on the outdoor side, or it can be replaced by the coil temperature of the outdoor heat exchanger. The current operating mode of the air conditioner includes, but is not limited to, heating mode, cooling mode, and dehumidification mode. Since there are only two flow directions of the refrigerant in the air conditioner, one is to pass through the outdoor heat exchanger first and then through the indoor heat exchanger, and the other is to pass through the indoor heat exchanger first and then through the outdoor heat exchanger, this embodiment and subsequent embodiments use heating mode and cooling mode as examples.

[0067] Step S20: Control the compressor to stop.

[0068] Understandably, in order not to affect the normal use of the air conditioner and to meet the actual shutdown requirements, the control of each component of the air conditioner in this embodiment is carried out after the compressor is officially shut down.

[0069] Step S30: Adjust the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature.

[0070] It should be noted that since the throttling element, the balancing solenoid valve, and the four-way valve can affect the refrigerant flow direction and flow rate of the air conditioner after the compressor stops, if it is determined that reverse oil extraction may occur based on the current operating mode of the air conditioner, the current operating parameters of the compressor, and the outdoor ambient temperature, this embodiment can adjust at least one of the throttling element, the balancing solenoid valve, and the four-way valve to reduce the refrigerant pressure at the compressor discharge port or change the refrigerant flow direction.

[0071] This embodiment obtains the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit is located, and the current operating mode of the air conditioner when the air conditioner receives a shutdown command during operation; controls the compressor to stop; and adjusts the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature. By judging the operating mode of the air conditioner before shutdown and the operating parameters of the compressor before shutdown, combined with the outdoor ambient temperature, the connection state of the throttling element, the balancing solenoid valve, and the four-way valve in the air conditioner is adjusted to control the refrigerant pressure and refrigerant flow in the refrigerant pipeline. This avoids excessive pressure difference between the compressor's exhaust port and intake port, which would cause the compressor to reverse due to pressure. This solves the technical problem in the prior art where the air conditioner shuts down when the pressure difference is large or the oil temperature is insufficient, causing the compressor to reverse.

[0072] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 Step S30 includes:

[0073] Step S301: When the current operating mode is heating mode, determine whether the outdoor ambient temperature is lower than the first temperature and whether the continuous running time is lower than the preset time.

[0074] It should be noted that in heating mode, after the refrigerant is discharged from the compressor's exhaust port, it first enters the indoor heat exchanger through the four-way valve. If the compressor stops at this time, and the outdoor ambient temperature is low, and the compressor's continuous operating time before stopping is short, the ambient temperature around the compressor is low, the oil viscosity is low, and the probability of the compressor rotor reversing and drawing oil is relatively high. The connection status of the balancing solenoid valve, throttling element, and the four-way valve can be adjusted to reduce the pressure difference between the compressor's exhaust port and suction port. The continuous operating time is the duration from when the compressor is turned on (or started) until the air conditioner receives the shutdown command.

[0075] Step S302: When the outdoor ambient temperature is less than the first temperature threshold and the continuous running time is less than the preset time, the connection status of the balancing solenoid valve, the throttling element and the four-way valve is adjusted at intervals of the first time.

[0076] It is understandable that the first temperature threshold can be set to -5℃. At this temperature, the lubricating oil has low viscosity and is prone to oil migration. The preset time can be set to 10 minutes. This embodiment does not impose specific restrictions on this.

[0077] The first interval can be set within the range of 1 to 3 seconds. Setting the first interval too long will cause more oil migration in the compressor. A suitable interval can allow the lubricating oil carried out by the refrigerant to return to the compressor, thus improving the oil return efficiency.

[0078] The first interval is started from the time the compressor stops. That is, when the outdoor ambient temperature is lower than the first temperature threshold and the continuous running time is less than the preset time, and after the first interval since the compressor stops, the connection status of the balancing solenoid valve, the throttling element, and the four-way valve is adjusted. The first, second, third, and fourth intervals in this application are started from the time the previous step is completed.

[0079] Further, adjusting the connection state of the balancing solenoid valve, the throttling element, and the four-way valve includes:

[0080] Open the balancing solenoid valve and adjust the opening of the throttling element to its maximum opening.

[0081] At a second time interval, the connection state of the four-way valve is switched, where the second time interval is longer than the second time interval.

[0082] In practice, opening the balancing solenoid valve can balance the pressure at the compressor's discharge port and suction port, reducing the pressure on both sides of the compressor rotor and the possibility of rotor reversal. Adjusting the opening of the throttling element to its maximum opening allows some refrigerant to flow towards the indoor heat exchanger due to the pressure difference in the refrigerant pipeline, thereby driving the flow of lubricating oil in the pipeline, reducing the amount of lubricating oil flowing back to the compressor, and thus reducing the possibility of lubricating oil being drawn back to the gas-liquid separator.

[0083] The second time interval is used to switch the connection state of the four-way valve in order to avoid frequent switching of the four-way valve in the heating mode. The second time interval is longer than the first time interval, and can generally be set to 3-10 seconds. This embodiment does not impose specific restrictions on this.

[0084] The second time interval begins after the balance solenoid valve is opened and the opening of the throttling element is adjusted to the maximum opening of the throttling element. That is to say, the four-way valve is switched to its connection state after the balance solenoid valve is opened and the opening of the throttling element is adjusted to the maximum opening of the throttling element for a second time.

[0085] Furthermore, the control method further includes:

[0086] When the outdoor ambient temperature is greater than or equal to a first temperature threshold, or when the continuous operating time is greater than or equal to a preset time, the connection state of the balancing solenoid valve and the throttling element is adjusted at intervals of a first time.

[0087] Determine the operating status of the air conditioner; and

[0088] When the air conditioner is in the temperature-reaching shutdown state, the connection state of the four-way valve is adjusted after a third time interval.

[0089] The third interval starts timing from when the air conditioner is determined to be in the temperature-reaching shutdown state. That is to say, after the air conditioner is determined to be shut down due to reaching the temperature, the connection state of the four-way valve is switched after the third interval. The third interval can generally be set to 2 minutes, but this embodiment does not impose a specific limitation on it.

[0090] It is understandable that if the outdoor ambient temperature is not very low, or if the continuous running time is greater than 10 minutes, the refrigerant pipeline of the air conditioner may have already established a stable pressure circuit. At this time, the shutdown may be due to the air conditioner reaching the temperature and shutting down. In this case, the compressor shutdown will not cause the lubricating oil to be drawn back into the gas-liquid separator, and there is no need to perform four-way valve switching or other controls.

[0091] If the air conditioner shuts down not because it has reached the required temperature, but because of a user control command or other shutdown command, there is still a risk of oil migration and compressor rotor reversal. Therefore, the following steps can be performed: after a first time interval, open the balancing solenoid valve and adjust the opening of the throttling element to the maximum opening of the throttling element; and after a second time interval, switch the connection state of the four-way valve, where the second time interval is longer than the first time interval.

[0092] Furthermore, determining whether the air conditioner has reached the required temperature and stopped includes:

[0093] The system obtains the indoor ambient temperature of the area where the indoor unit of the air conditioner is located and the set temperature of the air conditioner; and...

[0094] When the temperature difference between the indoor ambient temperature and the set temperature is less than the preset temperature difference value, the air conditioner is determined to be in the temperature-reached shutdown state.

[0095] It is understandable that determining whether an air conditioner is in a state of stopping after reaching the set temperature can be done by judging the temperature difference between the indoor ambient temperature of the area where the air conditioner is located and the set temperature of the air conditioner. If the temperature difference between the indoor ambient temperature and the set temperature is less than a certain threshold, such as 2°C, then it can be determined that the air conditioner has reached the set temperature and has stopped.

[0096] This embodiment determines whether the outdoor ambient temperature is lower than a first temperature and whether the continuous running time is less than a preset time when the current operating mode is heating mode. This allows for the adjustment of the connection status of the balancing solenoid valve, the throttling element, and the four-way valve after the compressor stops for a first time interval, thereby reducing the risk of oil migration and compressor rotor reversal.

[0097] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 Step S30 further includes:

[0098] Step S301: When the current operating mode is cooling mode, determine whether the outdoor ambient temperature is lower than the second temperature and whether the exhaust temperature is lower than the third temperature, wherein the third temperature is higher than the second temperature.

[0099] It is understandable that the second temperature can be set to 20℃ and the third temperature can be set to 40℃. Since the exhaust temperature is higher than the outdoor ambient temperature, the condenser cannot achieve the condensing effect and cannot exchange heat with the external environment. As a result, when the refrigerant enters the room, the indoor temperature will rise and the cooling mode will fail. Therefore, in this embodiment, the third temperature is set to be higher than the second temperature. The specific values ​​of the second and third temperatures are not specifically limited in this embodiment.

[0100] Step S302: When the outdoor ambient temperature is lower than the second temperature and the exhaust temperature is lower than the third temperature, the balancing solenoid valve is opened after a fourth time interval.

[0101] In cooling mode, after the refrigerant is discharged from the compressor's exhaust port, it first enters the outdoor heat exchanger through the four-way valve. If the compressor stops at this time, and the outdoor ambient temperature and exhaust temperature are low, the compressor will open the solenoid valve to avoid the high temperature affecting the opening of the balance solenoid valve and generating a lot of noise.

[0102] The fourth interval is started from the time after the compressor stops. That is, when the outdoor ambient temperature is lower than the second temperature and the exhaust temperature is lower than the third temperature, and after the compressor stops for the fourth time, the balancing solenoid valve is opened. The fourth time can be set to 1-5 seconds, that is, the balancing solenoid valve is opened 1-5 seconds after the compressor stops to achieve pressure balance of the compressor. This embodiment does not impose specific restrictions on the specific value of the above-mentioned time.

[0103] Furthermore, when the outdoor ambient temperature is greater than or equal to the second temperature, or the exhaust temperature is greater than or equal to the third temperature, the balancing solenoid valve is opened at a fifth time interval, wherein the fifth time interval is greater than the fourth time interval.

[0104] The fifth interval also starts timing after the compressor stops. That is, when the outdoor ambient temperature is greater than or equal to the second temperature, or the exhaust temperature is greater than or equal to the third temperature, and after the compressor stops for the fifth time, the balancing solenoid valve is opened. The second time interval can be set to 30 seconds, that is, the balancing solenoid valve is opened 30 seconds after the compressor stops to achieve pressure balance of the compressor. This embodiment does not impose specific restrictions on the specific value of the above-mentioned time interval.

[0105] If the outdoor temperature is high and the compressor discharge temperature is high, the refrigerant pipe temperature in the outdoor unit of the air conditioner will also be relatively high, making it easier to establish a stable pressure circuit. In this case, if the compressor suddenly stops, the balancing solenoid valve can be opened 30 seconds after the compressor stops to achieve pressure balance of the compressor and avoid frequent restarts.

[0106] This embodiment determines whether the outdoor ambient temperature is lower than a second temperature and whether the exhaust temperature is lower than a third temperature when the current operating mode is cooling mode. This allows for the selection of different intervals after the compressor stops to adjust the connection state of the balancing solenoid valve, reducing the risk of oil migration and compressor rotor reversal.

[0107] This application also provides a control device for an air conditioner; please refer to [reference needed]. Figure 5 The control device of the air conditioner includes:

[0108] The acquisition module 10 is used to acquire the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner when the air conditioner receives a shutdown command during operation.

[0109] The shutdown module 20 is used to control the compressor to stop.

[0110] The adjustment module 30 is used to adjust the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature.

[0111] In one embodiment, the adjustment module 30 is further configured to, when the current operating mode is heating mode, determine the temperature range of the outdoor ambient temperature and the duration range of the continuous operating time; and when the outdoor ambient temperature is less than a first temperature threshold and the continuous operating time is less than a preset duration, adjust the connection state of the balancing solenoid valve, the throttling element and the four-way valve at intervals of a first duration.

[0112] In one embodiment, the adjustment module 30 is further configured to open the balancing solenoid valve and adjust the opening degree of the throttling element to the maximum opening degree of the throttling element; and to switch the connection state of the four-way valve at intervals of a second duration, wherein the second duration is longer than the second duration.

[0113] In one embodiment, the adjustment module 30 is further configured to, at a first time interval, adjust the connection state of the balancing solenoid valve and the throttling element when the outdoor ambient temperature is greater than or equal to a first temperature threshold, or when the continuous running time is greater than or equal to a preset time interval; determine the operating state of the air conditioner; and when the air conditioner is in the temperature-reaching shutdown state, adjust the connection state of the four-way valve at a third time interval.

[0114] In one embodiment, the adjustment module 30 is further configured to acquire the indoor ambient temperature of the area where the indoor unit of the air conditioner is located and the set temperature of the air conditioner; and when the temperature difference between the indoor ambient temperature and the set temperature is less than a preset temperature difference value, determine that the air conditioner is in a temperature-reached shutdown state.

[0115] In one embodiment, the adjustment module 30 is further configured to, when the current operating mode is cooling mode, determine whether the outdoor ambient temperature is lower than a second temperature and whether the exhaust temperature is lower than a third temperature, wherein the third temperature is higher than the second temperature; and when the outdoor ambient temperature is lower than the second temperature and the exhaust temperature is lower than the third temperature, open the balancing solenoid valve at a fourth time interval.

[0116] In one embodiment, the adjustment module 30 is further configured to open the balancing solenoid valve at a fifth time interval when the outdoor ambient temperature is greater than or equal to the second temperature, or the exhaust temperature is greater than or equal to the third temperature, wherein the fifth time interval is greater than the fourth time interval.

[0117] This embodiment obtains the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit is located, and the current operating mode of the air conditioner when the air conditioner receives a shutdown command during operation; controls the compressor to stop; and adjusts the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature. By judging the operating mode of the air conditioner before shutdown and the operating parameters of the compressor before shutdown, combined with the outdoor ambient temperature, the connection state of the throttling element, the balancing solenoid valve, and the four-way valve in the air conditioner is adjusted to control the refrigerant pressure and refrigerant flow in the refrigerant pipeline. This avoids excessive pressure difference between the compressor's exhaust port and intake port, which would cause the compressor to reverse due to pressure. This solves the technical problem in the prior art where the air conditioner shuts down when the pressure difference is large or the oil temperature is insufficient, causing the compressor to reverse.

[0118] The air conditioner control device provided in this application, employing the air conditioner control method in the above embodiments, can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the air conditioner control device provided in this application are the same as those of the air conditioner control method provided in the above embodiments, and other technical features in the air conditioner control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0119] This application provides an air conditioner, 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 conditioner in the first embodiment described above.

[0120] The following is for reference. Figure 6 The diagram illustrates a structural schematic of an air conditioner suitable for implementing embodiments of this application. The air conditioner in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 6 The air conditioner shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0121] like Figure 6As shown, the air conditioner may include a processing device 1001 (e.g., a central processing unit, a graphics processor, 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. The RAM 1004 also stores various programs and data required for the operation of the air conditioner. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the air conditioner to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows an air conditioner with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.

[0122] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application 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 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0123] The air conditioner provided in this application, employing the control method of the air conditioner in the above embodiments, can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as the beneficial effects of the control method of the air conditioner provided in the above embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the previous embodiment, and will not be repeated here.

[0124] It should be understood that the various parts disclosed in 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 embodiment of this application, but the scope of protection 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 scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0126] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the air conditioner control method of the above embodiments.

[0127] 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, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, 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 devices, magnetic storage devices, 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 conditioner; or it may exist independently and not be installed in the air conditioner.

[0129] The aforementioned computer-readable storage medium carries one or more programs, which, when executed by the air conditioner, cause the air conditioner to perform the aforementioned air conditioner control method.

[0130] Computer program code for performing the operations of this application 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 readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the air conditioner described above, and is capable of solving the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the control method of the air conditioner 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 air conditioner control method described above.

[0135] The computer program product provided in this application can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the air conditioner control method provided in the above embodiments, and will not be repeated here.

[0136] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes a heat pump circuit and an enthalpy-increasing circuit. The heat pump circuit includes an outdoor unit and an indoor unit. The outdoor unit includes a compressor, a four-way valve, a gas-liquid separator, a throttling element, a first outdoor heat exchanger, and a second outdoor heat exchanger. A balancing solenoid valve is also provided between the exhaust port of the compressor and the gas-liquid separator. The indoor unit includes at least one indoor heat exchanger. One end of the enthalpy-increasing circuit is connected to the second outdoor heat exchanger, and the other end is connected to the enthalpy injection port of the compressor. The control method for the air conditioner includes: When the air conditioner receives a shutdown command during operation, it acquires the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner. Control the compressor to stop; and Adjust the connection status of at least one of the following components—the throttling element, the balancing solenoid valve, and the four-way valve—based on the current operating mode, the current operating parameters, and the outdoor ambient temperature.

2. The control method for an air conditioner as described in claim 1, characterized in that, The current operating parameters include at least the continuous operating time of the compressor; Adjusting the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature includes: When the current operating mode is heating mode, determine the temperature range of the outdoor ambient temperature and the duration range of the continuous operation; and When the outdoor ambient temperature is less than a first temperature threshold and the continuous operating time is less than a preset time, the connection status of the balancing solenoid valve, the throttling element and the four-way valve are adjusted at intervals of a first time.

3. The control method for an air conditioner as described in claim 2, characterized in that, Adjusting the connection state of the balancing solenoid valve, the throttling element, and the four-way valve includes: Open the balancing solenoid valve and adjust the opening of the throttling element to its maximum opening; and At a second time interval, the connection state of the four-way valve is switched, where the second time interval is longer than the second time interval.

4. The control method for an air conditioner as described in claim 2, characterized in that, The control method further includes: When the outdoor ambient temperature is greater than or equal to a first temperature threshold, or when the continuous operating time is greater than or equal to a preset time, the connection state of the balancing solenoid valve and the throttling element is adjusted at intervals of a first time. Determine the operating status of the air conditioner; and When the air conditioner is in the temperature-reaching shutdown state, the connection state of the four-way valve is adjusted after a third time interval.

5. The control method for an air conditioner as described in claim 4, characterized in that, Determining the operating status of the air conditioner includes: The system obtains the indoor ambient temperature of the area where the indoor unit of the air conditioner is located and the set temperature of the air conditioner; and... When the temperature difference between the indoor ambient temperature and the set temperature is less than the preset temperature difference value, the air conditioner is determined to be in the temperature-reached shutdown state.

6. The control method for an air conditioner as described in claim 1, characterized in that, The current operating parameters also include the exhaust temperature at the compressor's exhaust port; The method of adjusting the connection state of at least one of the throttling element, the balancing solenoid valve, and the four-way valve according to the current operating mode, the current operating parameters, and the outdoor ambient temperature further includes: When the current operating mode is cooling mode, it is determined whether the outdoor ambient temperature is lower than a second temperature, and whether the exhaust temperature is lower than a third temperature, wherein the third temperature is higher than the second temperature; and When the outdoor ambient temperature is lower than the second temperature and the exhaust temperature is lower than the third temperature, the balancing solenoid valve is opened at a fourth time interval.

7. The control method for an air conditioner as described in claim 6, characterized in that, The control method for the air conditioner further includes: When the outdoor ambient temperature is greater than or equal to the second temperature, or the exhaust temperature is greater than or equal to the third temperature, the balancing solenoid valve is opened at a fifth time interval, wherein the fifth time interval is greater than the fourth time interval.

8. A control device for an air conditioner, characterized in that, The control device for the air conditioner includes: The acquisition module is used to acquire the current operating parameters of the compressor, the outdoor ambient temperature of the area where the outdoor unit of the air conditioner is located, and the current operating mode of the air conditioner when the air conditioner receives a shutdown command during operation. A shutdown module is used to control the compressor to stop; and The adjustment module is used to adjust the connection state of at least one of the following components: the throttling element, the balancing solenoid valve, and the four-way valve, according to the current operating mode, the current operating parameters, and the outdoor ambient temperature.

9. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, the control program being configured to implement the control method for the air conditioner as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the control method for an air conditioner as described in any one of claims 1 to 7.

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