Control method, device and equipment of air conditioner and storage medium

Abstract

The invention discloses a control method, device and equipment of an air conditioner and a storage medium. The air conditioner comprises a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device comprises a first mode used for conveying indoor air to the outdoor, the operation mode of the air conditioner comprises a heating mode, and the method comprises the steps that working parameters of the air conditioner in the heating mode are obtained; and based on the working parameters, the air conditioner is controlled to start a defrosting mode for defrosting the first heat exchanger, and the fresh air device is controlled to operate in the first mode. Therefore, cold energy which is generated by the air conditioner in the defrosting mode and is not beneficial to a user can be pumped away, the comfort level of the user is improved, in the process of conveying indoor air to the outdoor, the pressure of a refrigerant at the position of the first heat exchanger of the outdoor unit is improved, and therefore the defrosting effect of the air conditioner is improved.

Description

Technical Field

[0001] The present application relates to the field of control technology, and in particular to a control method, device, equipment and storage medium for an air conditioner. Background Art

[0002] With the popularity of air conditioners, air conditioners will heat in winter. However, during the long heating process, the outdoor unit of the air conditioner will be in a low temperature and low pressure state. Long-term operation will cause frost on the outdoor condenser. Therefore, the condenser needs to be defrosted.

[0003] In the related art, during the defrosting process of the condenser, the evaporator on the indoor side will be in a low temperature and low pressure state. When the moisture in the air contacts the low temperature surface of the evaporator, it becomes condensed water, and these water droplets form frost on the surface of the evaporator, causing a large amount of frost to condense on the evaporator. In addition, in order to prevent the cold energy of the evaporator on the indoor side from being blown into the room, it is also necessary to control the indoor fan to stop running.

[0004] However, with the above solution, when the condenser is defrosted and switched to normal heating mode, the air conditioner needs to generate more heat to defrost the evaporator. During the defrosting process, a large amount of water vapor will be generated, which will eventually be blown into the room, reducing the user's comfort. In addition, since the indoor fan cannot operate, the evaporator cannot exchange heat. This will result in the outdoor condenser not getting enough heat input, resulting in poor defrosting efficiency, which will affect the heating effect of the air conditioner. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a control method, device, equipment and storage medium for an air conditioner, aiming to improve user comfort and the heating efficiency of the air conditioner.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for controlling an air conditioner, the method comprising:

[0008] The air conditioner comprises: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device comprises: a first mode for conveying indoor air to the outdoors, the operation mode of the air conditioner comprises: a heating mode, and the method comprises:

[0009] Acquire the operating parameters of the air conditioner in the heating mode;

[0010] Based on the working parameters, the air conditioner is controlled to start a defrost mode for defrosting the first heat exchanger, and the fresh air device is controlled to operate in the first mode.

[0011] In some embodiments, the air conditioner further comprises: an indoor fan, a compressor and a four-way valve, the state of the four-way valve comprises: a first state for directing the refrigerant of the compressor to flow to the first heat exchanger first, and in the defrost mode, the method further comprises:

[0012] The indoor fan is controlled to stop running, and the four-way valve is controlled to switch to the first state.

[0013] In some embodiments, the indoor fan comprises: an air outlet, a filter is arranged at the air outlet, and in the defrost mode, the method further comprises:

[0014] The filter is controlled to close the air outlet.

[0015] In some embodiments, the air conditioner further comprises: a second heat exchanger disposed on the indoor side, and in the defrost mode, the method further comprises:

[0016] Acquire first temperature data of the environment in which the air conditioner is located and second temperature data of the second heat exchanger;

[0017] In response to the second temperature data being greater than or equal to the first temperature data, the first mode is exited, and the fresh air device is controlled to stop running after running for a set period of time.

[0018] In some embodiments, the air conditioner further includes: a second heat exchanger disposed on the indoor side, the state of the four-way valve further includes: a second state for firstly directing the refrigerant of the compressor to flow to the second heat exchanger, and in the defrost mode, the method further includes:

[0019] Acquire third temperature data, where the third temperature data is temperature data of the first heat exchanger in the first state;

[0020] If it is determined that the third temperature data is greater than or equal to the first set temperature threshold, the four-way valve is controlled to switch the first state to the second state.

[0021] In some embodiments, the operating parameters include: fourth temperature data, the fourth temperature data is temperature data of the first heat exchanger in the heating mode, and based on the operating parameters, controlling the air conditioner to start a defrosting mode for defrosting the first heat exchanger includes:

[0022] Based on the fourth temperature data and the second set temperature threshold, a timing duration is generated, where the timing duration is used to represent a duration during which the fourth temperature data is less than the second set temperature threshold;

[0023] If it is determined that the timing duration is greater than or equal to the set duration threshold, the air conditioner is controlled to start a defrosting mode for defrosting the first heat exchanger.

[0024] In some embodiments, the operation mode of the fresh air device further includes: a second mode for delivering outdoor air to indoor space, and the method further includes:

[0025] If it is determined that the fourth temperature data is greater than or equal to the second set temperature threshold, the fresh air device is controlled to operate in the second mode.

[0026] In a second aspect, an embodiment of the present application provides a control device for an air conditioner, the air conditioner comprising: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device comprising: a first mode for conveying indoor air to the outdoors, the operation mode of the air conditioner comprising: a heating mode, the device comprising:

[0027] An acquisition module, used for acquiring the working parameters of the air conditioner in the heating mode;

[0028] A control module is used to control the air conditioner to start a defrost mode for defrosting the first heat exchanger based on the working parameters, and control the fresh air device to operate in the first mode.

[0029] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein:

[0030] The processor is used to execute the steps of the method described in the first aspect when running a computer program.

[0031] In a fourth aspect, an embodiment of the present application provides a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect are implemented.

[0032] The technical solution provided by the embodiment of the present application provides a control method for an air conditioner, the air conditioner includes: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device includes: a first mode for delivering indoor air to the outdoor side, the operation mode of the air conditioner includes: a heating mode, and the method includes: obtaining the working parameters of the air conditioner in the heating mode; based on the working parameters, controlling the air conditioner to start the defrosting mode for defrosting the first heat exchanger, and controlling the fresh air device to operate in the first mode. In this way, by delivering indoor air to the outdoor side through the first mode of the fresh air device, the coldness generated by the air conditioner in the defrosting mode that is not conducive to the user can be extracted, thereby improving the user's comfort, and in the process of delivering indoor air to the outdoor side, the pressure of the refrigerant at the first heat exchanger is increased, thereby improving the defrosting effect of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of an air conditioner provided in one embodiment of the present application;

[0034] Figure 2 A flow chart of a method for controlling an air conditioner provided in one embodiment of the present application;

[0035] Figure 3 A structural schematic diagram of an air conditioner provided as an application example of this application;

[0036] Figure 4 This is a defrosting principle diagram of the back-blowing function of the fresh air system in an application example of this application;

[0037] Figure 5 A flow chart of a control scheme for rapid defrosting of a fresh air system in an application example of this application;

[0038] Figure 6 A schematic diagram of the structure of a control device for an air conditioner provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0040] Description of Reference Numerals

[0041] 11. The first heat exchanger;

[0042] 12. Indoor fan;

[0043] 13. Compressor;

[0044] 14. Four-way valve;

[0045] 15. Second heat exchanger;

[0046] 16. Indoor pipe temperature sensor;

[0047] 17. Indoor ambient temperature sensor;

[0048] 18. Outdoor pipe temperature sensor;

[0049] 19. External fan;

[0050] 20. Throttle valve. DETAILED DESCRIPTION

[0051] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0053] The present application embodiment provides an air conditioner, such as Figure 1 As shown, the air conditioner includes: a fresh air device, a first heat exchanger 11 arranged on the outdoor side, an indoor fan 12, a compressor 13 and a four-way valve 14, and a second heat exchanger 15 arranged on the indoor side.

[0054] It is understandable that the fresh air device is provided on the air conditioner, and the fresh air device is used to exchange indoor and outdoor air. Exemplarily, the air conditioner includes: an indoor unit and an outdoor unit, wherein the indoor unit includes an indoor fan 12 and a second heat exchanger 15, the fresh air device can be connected to the indoor unit and arranged on the indoor side, and the air duct of the fresh air device can be connected to the indoor fan 12, and the indoor fan 12 is used to drive the indoor air for heat exchange. The indoor fan 12 includes: an air outlet, and a filter is provided at the air outlet. The filter here can be a closable functional filter, and the opening and closing of the filter can be controlled.

[0055] Exemplarily, the fresh air device may include: an air duct, a fan, and a filter device. The operation modes of the fresh air device include: a first mode for delivering indoor air to the outdoors and a second mode for delivering outdoor air to the indoors. Here, the fresh air device may realize the first mode of delivering indoor air to the outdoors based on the reverse rotation of the fan, or realize the second mode of delivering outdoor air to the indoors based on the forward rotation of the fan.

[0056] It can be understood that the outdoor unit of the air conditioner includes: a first heat exchanger 11, the first heat exchanger 11 is arranged on the outdoor side, and the second heat exchanger 15 is arranged on the indoor side, both of which are used to realize the heat exchange of the air conditioner. The compressor 13 is the heart of the air conditioning system, which is used to compress and transport high-temperature and high-pressure gas refrigerant. The compressor 13 is connected to one end of the four-way valve 14, and the other end of the four-way valve 14 is respectively connected to the first heat exchanger 11 and the second heat exchanger 15. The state of the four-way valve 14 includes: a first state for the refrigerant of the compressor 13 to flow to the first heat exchanger 11 first and a second state for the refrigerant of the compressor 13 to flow to the second heat exchanger 15 first.

[0057] Here, the operation modes of the air conditioner include: heating mode and cooling mode. The switching between the cooling mode and the heating mode of the air conditioner can be achieved by switching the first state and the second state of the four-way valve 14. In addition, in the heating mode, the refrigerant generated by the compressor 13 releases heat on the indoor side and absorbs heat on the outdoor side. In the cooling mode, the refrigerant generated by the compressor 13 absorbs heat on the indoor side and releases heat on the outdoor side. For the first heat exchanger 11, when cooling, it acts as a condensing end and has a heat dissipation effect on the refrigerant, and when heating, it acts as an evaporating end and has a heat absorption effect on the refrigerant. For the second heat exchanger 15, when cooling, it acts as an evaporating end and has a heat absorption effect on the refrigerant, and when heating, it acts as a condensing end and has a heat dissipation effect on the refrigerant.

[0058] For example, in the cooling mode, corresponding to the first state of the four-way valve 14, the first state is used to make the refrigerant of the compressor 13 flow to the first heat exchanger 11 first. In the first state, the high-temperature and high-pressure gas refrigerant discharged from the compressor 13 flows through the four-way valve 14, and the four-way valve 14 controls the refrigerant to flow to the first heat exchanger 11 first, and then to the second heat exchanger 15. At this time, for the first heat exchanger 11, it serves as the condensing end, and the refrigerant dissipates heat at the first heat exchanger 11 on the outdoor side, and the second heat exchanger 15 serves as the evaporating end, and absorbs heat at the second heat exchanger 15.

[0059] For example, when the outdoor temperature is low, the air conditioner needs to be controlled to enter the heating mode. In the heating mode, the corresponding four-way valve is in the second state, and the second state is used to make the refrigerant of the compressor 13 flow to the second heat exchanger 15 first, and then to the first heat exchanger 11. At this time, the first heat exchanger 11 acts as an evaporation end and absorbs heat from the refrigerant, and the second heat exchanger 11 acts as a condensation end and dissipates heat from the refrigerant. At this time, if the heating mode is operated for a long time, the first heat exchanger 11 will frost.

[0060] It can be understood that the air conditioner also includes: an indoor ambient temperature sensor 16, an indoor pipe temperature sensor 17 and an outdoor pipe temperature sensor 18, wherein the indoor ambient temperature sensor 16 is used to detect the first temperature data of the environment in which the air conditioner is located, the indoor pipe temperature sensor 17 is used to detect the second temperature data of the second heat exchanger 15, and the outdoor pipe temperature sensor 18 is used to detect the temperature data of the first heat exchanger 11.

[0061] The present application also provides a method for controlling an air conditioner. Figure 2 As shown, the method comprises the following steps:

[0062] Step 210: Obtain the operating parameters of the air conditioner in the heating mode.

[0063] Here, after determining that the air conditioner enters the heating mode, the control device of the air conditioner will obtain the working parameters of the air conditioner in the heating mode.

[0064] Step 220: Based on the operating parameters, control the air conditioner to start a defrost mode for defrosting the first heat exchanger, and control the fresh air device to operate in the first mode.

[0065] Here, in the heating mode of the air conditioner, the first heat exchanger arranged on the outdoor side is in a low temperature and low pressure state, and the first heat exchanger will be frozen if it is operated for a long time. Therefore, based on the working parameters, the air conditioner is controlled to start the defrost mode for defrosting the first heat exchanger, that is, the air conditioner starts the defrost mode in the heating mode.

[0066] Here, based on the working parameters, the fresh air device is controlled to operate in the first mode. In the first mode, the fresh air device transports indoor air to the outside, so that the fresh air device exhausts air to the outside of the room, thereby increasing the pressure inside, and correspondingly, the outdoor pressure will also become relatively high. The first heat exchanger is arranged on the outdoor side, and accordingly, the pressure of the refrigerant at the first heat exchanger of the outdoor unit can be increased.

[0067] Exemplarily, the fresh air device may be provided with a reverse blowing function by controlling the reverse rotation of the fan in the fresh air device, so that the fresh air device exhausts air to the outside of the room.

[0068] In this way, the indoor air is transported to the outdoors through the first mode of the fresh air device, which can remove the cold that is not beneficial to the user generated by the air conditioner in the defrost mode, thereby improving the user's comfort. In the process of transporting the indoor air to the outdoors, the pressure of the refrigerant at the first heat exchanger is increased, thereby improving the defrost effect of the air conditioner.

[0069] In some embodiments, in the defrost mode, the method includes:

[0070] The indoor fan is controlled to stop running, and the four-way valve is controlled to switch to the first state.

[0071] Here, when the air conditioner starts the defrost mode, the control device of the air conditioner controls the indoor fan of the indoor unit to stop running in the defrost mode, because in the defrost mode, the indoor side of the air conditioner will generate cold energy. In this way, controlling the indoor fan to stop running can prevent the cold energy generated by the air conditioner on the indoor side from being brought into the room.

[0072] Here, the four-way valve is controlled to switch to the first state, and the refrigerant of the compressor is controlled to flow to the first heat exchanger first. At this time, the refrigerant absorbs heat in the indoor unit and releases heat in the outdoor unit, that is, the air conditioner is controlled to be switched from heating mode to cooling mode. In this way, the first heat exchanger arranged on the outdoor side will not be in a low temperature and low pressure state, thereby realizing defrosting of the first heat exchanger on the outdoor side.

[0073] In this way, it is possible to avoid bringing the cold energy generated by the air conditioner on the indoor side into the room, and to achieve defrosting of the first outdoor heat exchanger.

[0074] In some embodiments, in the defrost mode, the method further includes:

[0075] Control the filter to close the air outlet.

[0076] Here, in the defrost mode of the first heat exchanger, the four-way valve is switched to the first state. At this time, the refrigerant is in a state of releasing heat on the outdoor side and absorbing heat on the indoor side. Correspondingly, a large amount of frost will condense on the indoor side, that is, on the indoor unit side of the air conditioner. For example, a large amount of frost will condense on the second heat exchanger 15. At this time, when the fresh air device is operating in the first mode, the pressure on the indoor side can also be increased to defrost the frost on the indoor side. During the defrosting process, a large amount of water vapor will be generated, which will eventually be blown into the room, and the user will easily experience discomfort.

[0077] Here, in the defrost mode, the fresh air device transports indoor air to the outdoors, so that the fresh air device exhausts air to the outside of the room, thereby increasing the pressure on the indoor unit side, so that the frost condensed on the indoor unit side can be defrosted. At this time, the filter is controlled to close the air outlet of the indoor fan of the indoor unit, so as to prevent the large amount of water vapor generated by the air conditioner when defrosting the indoor unit side from condensing on the indoor unit and being blown into the room, which improves the user experience and greatly reduces the heating effect caused by the defrosting of the air conditioner.

[0078] In some embodiments, the method further comprises:

[0079] Acquire first temperature data of the environment where the air conditioner is located and second temperature data of the second heat exchanger;

[0080] In response to the second temperature data being greater than or equal to the first temperature data, the first mode is exited, and the fresh air device is controlled to stop running after running for a set period of time.

[0081] Here, in the defrost mode, the control device of the air conditioner can detect and obtain the first temperature data of the environment where the air conditioner is located and the second temperature data of the second heat exchanger based on the indoor environment temperature sensor 16.

[0082] For example, the air conditioner is installed in a house, and the first temperature data is the temperature data in the house where the air conditioner is located. The second heat exchanger is arranged indoors, and the temperature of the surface of the copper tube of the second heat exchanger is detected by the indoor pipe temperature sensor 17 to obtain the second temperature data.

[0083] Here, when the second temperature data is greater than or equal to the first temperature data, it indicates that the temperature of the second heat exchanger is the same as or greater than the ambient temperature. At this time, it indicates that the frost on the second heat exchanger has melted completely, and no cold air will be generated on the indoor side to affect the indoor temperature. The first mode is exited, and the fresh air device is controlled to stop running after the set time.

[0084] In this way, by responding to the second temperature data being greater than or equal to the first temperature data, the first mode is exited, and the fresh air device is controlled to stop running after a set period of time. This can effectively identify whether the second heat exchanger of the current air conditioner has been defrosted, thereby achieving effective control of the air conditioner and saving energy.

[0085] In some embodiments, in the defrost mode, the method further includes:

[0086] Acquire third temperature data, where the third temperature data is temperature data of the first heat exchanger in the first state;

[0087] If it is determined that the third temperature data is greater than or equal to the first set temperature threshold, the four-way valve is controlled to switch the first state to the second state.

[0088] Here, in the defrost mode, the temperature data of the first heat exchanger in the first state where the refrigerant of the compressor flows to the first heat exchanger first, i.e., the third temperature data, is obtained. For example, the outdoor pipe temperature sensor can detect the temperature data of the surface of the copper tube of the first heat exchanger as the temperature data of the first heat exchanger in the first state, i.e., the third temperature data.

[0089] Here, the first set temperature threshold is the temperature value of the copper tube surface after the first heat exchanger is defrosted. If it is determined that the third temperature data is greater than or equal to the first set temperature threshold, at this time, the first heat exchanger has completed defrosting, and the four-way valve is controlled to switch the first state to the second state. The second state here refers to the second state in which the four-way valve allows the refrigerant of the compressor to flow to the second heat exchanger first.

[0090] In this way, by controlling the four-way valve to switch the first state to the second state if it is determined that the third temperature data is greater than or equal to the first set temperature threshold, it is possible to effectively detect whether the current first heat exchanger has completed defrosting, thereby improving the control efficiency of the air conditioner.

[0091] In some embodiments, the working parameters include: fourth temperature data, the fourth temperature data is temperature data of the first heat exchanger in the heating mode, and based on the working parameters, controlling the air conditioner to start a defrosting mode for defrosting the first heat exchanger includes:

[0092] Based on the fourth temperature data and the second set temperature threshold, a timing duration is generated, where the timing duration is used to represent a duration during which the fourth temperature data is less than the second set temperature threshold;

[0093] If it is determined that the timing duration is greater than or equal to the set duration threshold, the air conditioner is controlled to start a defrosting mode for defrosting the first heat exchanger.

[0094] Here, the temperature data of the first heat exchanger in the heating mode, that is, the fourth temperature data, is less than or equal to the second set temperature threshold, where the second set temperature threshold is the temperature value at which the heat exchanger needs to start defrosting. When it is determined that the fourth temperature data is less than the second set temperature threshold, the defrosting condition of the defrosting mode is met, but defrosting cannot be started yet and a period of time is required. That is, when the fourth temperature data is less than the second set temperature threshold, the control device of the air conditioner starts timing and generates a timing duration, which is used to characterize the duration of the fourth temperature data being less than or equal to the second set temperature threshold.

[0095] Here, if it is determined that the timing duration is greater than or equal to the set duration threshold, the air conditioner is controlled to start the defrost mode for defrosting the first heat exchanger. In this way, by controlling the air conditioner to start the defrost mode for defrosting the first heat exchanger if the timing duration is greater than or equal to the set duration threshold, the defrost efficiency of the first heat exchanger is improved.

[0096] In some embodiments, the operation mode of the fresh air device further includes: a second mode for delivering outdoor air to indoor space, and the method further includes:

[0097] If it is determined that the fourth temperature data is greater than or equal to the second set temperature threshold, the fresh air device is controlled to operate in the second mode.

[0098] Here, when it is determined that the fourth temperature data is greater than or equal to the second set temperature threshold, the first heat exchanger does not need to be defrosted, and the fresh air device is controlled to operate in the second mode. The outdoor fresh air can run forward through the fresh air duct motor to deliver fresh air to the room.

[0099] Below, the embodiment of the present application is described in detail with reference to an application example.

[0100] At present, when the air conditioner is heating and defrosting, the indoor evaporator will not change to low temperature and low pressure. In order to avoid blowing the cold air of the evaporator to the indoor room, the conventional method is to stop the indoor fan during defrosting. At this time, the evaporator cannot exchange heat. Although the cold air will not be blown to the indoor room, the evaporator cannot exchange heat, which will make the outdoor condenser defrost poorly and prolong the time. Therefore, a new solution needs to be considered to deal with it. It can not only quickly not affect the heat exchange of the indoor unit, but also solve the problem of blowing the frost water generated in the defrosting room directly to the indoor room after the defrosting is completed.

[0101] Based on this, adopting the above solution will lead to the following disadvantages:

[0102] 1. Stopping the internal fan during defrosting will prolong the defrosting time, which is not conducive to the user's heating experience.

[0103] 2. During defrosting, a large amount of frost condenses on the evaporator. When switching to normal heating mode, more heating power is required to defrost. During defrosting, a large amount of water vapor is generated, which will eventually blow into the room, making users feel uncomfortable.

[0104] like Figure 3 As shown, this application example first introduces the relevant principles of the air-conditioning system.

[0105] In this application example, Figure 3 As shown, Figure 3 Schematic diagram of the structure of an air conditioner, the air conditioner comprises:

[0106] Compressor 13 - the heart of the air conditioning system, compressing and transporting refrigerant;

[0107] Four-way valve 14 - realizes switching between cooling mode and heating mode. Here, one end of the four-way valve is connected to the compressor. The states of the four-way valve include: a first state for directing the refrigerant of the compressor to flow to the first heat exchanger first and a second state for directing the refrigerant of the compressor to flow to the second heat exchanger first. The four-way valve can enter the cooling mode and heating mode of the air conditioner respectively through the first state and the second state.

[0108] Condenser (i.e. the aforementioned first heat exchanger) 11 - acts as a condensing end during cooling, and has a heat dissipation effect on the refrigerant; acts as an evaporating end during heating, and has a heat absorption effect on the refrigerant;

[0109] The outdoor fan 19 drives the outdoor air through the heat exchanger, i.e., the condenser, so that the air exchanges heat with the refrigerant in the pipe;

[0110] The outdoor pipe temperature sensor 18 is used to detect the temperature T3 (i.e., the fourth temperature data) of the copper tube surface of the condenser in the heating mode and the temperature T4 (i.e., the third temperature data) of the copper tube surface of the condenser in the first state of the four-way valve in the defrosting mode;

[0111] Throttle valve 20——plays the role of throttling and reducing pressure;

[0112] Evaporator (i.e. the aforementioned second heat exchanger) 15 - acts as an evaporation end during cooling, absorbing heat from the refrigerant, and acts as a condensation end during heating, dissipating heat from the refrigerant;

[0113] Internal fan (i.e. the aforementioned indoor fan) 12 - drives the indoor air through the heat exchanger, i.e. the evaporator, so that the air exchanges heat with the refrigerant in the pipe;

[0114] Indoor pipe temperature sensor 17 - detects the temperature T2 (i.e. the aforementioned second temperature data) on the surface of the indoor heat exchanger, i.e., the evaporator copper tube;

[0115] Indoor ambient temperature sensor 16 - detects the indoor ambient temperature T1 (i.e. the aforementioned first temperature data);

[0116] The fresh air system of the indoor unit (i.e. the fresh air device mentioned above) is a system that can exchange indoor and outdoor air, consisting of air ducts, fans, and filtering devices;

[0117] Closable functional filter (i.e. the filter mentioned above) - used to close the air outlet of the internal fan.

[0118] 1. The operating principle of the air conditioning system in cooling mode.

[0119] When the air-conditioning system is cooling, the air-conditioning system operates normally and, under user control, can control the fresh air system (i.e., the aforementioned fresh air device) to start the fresh air mode (i.e., the aforementioned second mode). Based on the second mode, the motor of the fresh air device is controlled to run forward, and the fresh air is controlled to transport fresh air from outdoors to indoors through the fresh air duct.

[0120] In cooling mode, the refrigerant flow direction of the air conditioning system is as follows Figure 3 As shown by the solid arrow in the figure, the high-temperature and high-pressure gas refrigerant discharged from the compressor 13 flows through the four-way valve 14. In the refrigeration mode, the four-way valve 14 is in a first state for directing the refrigerant of the compressor 13 to flow to the first heat exchanger 11 (i.e., the condenser) first. The four-way valve 14 controls the refrigerant of the compressor 13 to flow to the condenser 11 first. After entering the condenser 11, the condenser 11 dissipates heat for the refrigerant. After passing through the outdoor fan 19 and then the throttle valve 20, the refrigerant enters the second heat exchanger 15, i.e., the evaporator on the indoor side, to absorb heat and evaporate, so that the gaseous refrigerant returns to the compressor 13 for circulation.

[0121] 2. The operating principle of the air conditioning system in heating mode.

[0122] When the air conditioning system is heating, Figure 3 As shown by the dotted arrow, the high-temperature and high-pressure gas refrigerant discharged from the compressor 13 flows through the four-way valve 14. In the heating mode, the four-way valve 14 is in the second state for directing the refrigerant of the compressor 13 to flow to the second heat exchanger 15, i.e., the evaporator. The four-way valve 14 controls the refrigerant to enter the evaporator side for heat dissipation, and then passes through the filter, and then throttles through the heating throttle valve 20 to form a low-temperature and low-pressure refrigerant. The refrigerant then enters the outdoor condenser 11 for heat absorption and evaporation, and the gaseous refrigerant returns to the compressor 13 for circulation. At this time, the outdoor fan 19 of the air conditioning system handles the low-temperature and low-pressure state, and the condenser 11 will be frozen and frosted if it is operated for a long time. Therefore, the condenser 11 needs to be defrosted.

[0123] 3. The operating principle of the air conditioner entering the defrost mode in heating mode.

[0124] When the four-way valve 14 is switched to the defrost mode, the indoor unit evaporator 15 will become a low-temperature and low-pressure state. At this time, the user needs hot air, and the indoor fan cannot exhaust cold air, so the indoor fan 12 needs to remain in a stopped state. At this time, since the indoor unit cannot exchange heat, the evaporator 15 will quickly be covered with frost when running in this state.

[0125] Therefore, refer to Figure 4 , Figure 4 This is the defrost principle diagram of the back-blowing function of the fresh air device.

[0126] This application example adds a reverse blowing function to the fresh air system, that is, the operating states of the fresh air device include: a first mode for transporting indoor air to the outdoors (i.e., the reverse blowing function), so that the fresh air system exhausts air to the outside of the room and a second mode for transporting outdoor air to the indoors, i.e., the general fresh air mode, that is, the forward and reverse fresh air exhaust and exhaust system.

[0127] The internal fan, that is, the return air outlet of the indoor fan, is closed by controlling the closed filter. The rear filter can be adjusted to open and close, and the exhaust air flow will flow back through the evaporator through the indoor air outlet, and the cold on the evaporator is discharged from the fresh air duct to the indoor room, which is equivalent to the evaporator realizing heat exchange. A large amount of frost and water vapor will not condense at the indoor unit, which will increase the internal pressure and the outdoor pressure will also become relatively high, thereby achieving the purpose of rapid defrosting of the condenser, greatly reducing the impact of air conditioning defrosting on the user experience of heating effect.

[0128] In this application example, the specific steps of a control solution for rapid defrosting of a fresh air system are as follows:

[0129] Step 501: The air conditioner operates in heating mode.

[0130] Here, the air conditioner is in a heating mode, and the operating parameters of the air conditioner in the heating mode are obtained. The operating parameters include: fourth temperature data, and the fourth temperature data is the temperature data of the first heat exchanger in the heating mode.

[0131] Here, when the heating is turned on, the T3 temperature is detected first. The four-way valve is in the first state, and the T3 temperature here (i.e., the fourth temperature data mentioned above) can be obtained by detecting the temperature of the copper tube surface of the condenser in the heating mode based on the outdoor pipe temperature sensor 18.

[0132] Step 502: Detect T3 ≥ second set threshold a.

[0133] Step 503: The air conditioner operates normally for heating, and the fresh air system delivers fresh air to the room normally.

[0134] Here, if it is determined that T3 ≥ the second set temperature threshold a, the fresh air device, that is, the fresh air system, is controlled to operate in the second mode, the air conditioner operates normally for heating, and the fresh air system delivers fresh air to the room normally.

[0135] Step 504: Detect T3 < second set threshold a.

[0136] Here, if it is determined that T3 is less than the second set temperature threshold a, the air conditioner enters the defrost timing, and after running for a certain period of time, the timing duration is obtained, which is used to represent the duration that the fourth temperature data is less than or equal to the second set temperature threshold.

[0137] If it is determined that the timing duration is greater than or equal to the set duration threshold, the air conditioner is controlled to start a defrost mode for defrosting the first heat exchanger, and the system enters the defrost mode.

[0138] Step 505: The system enters the defrost mode.

[0139] The fresh air device is controlled to operate in the first mode, that is, the fresh air system is controlled to reverse and exhaust air. In this way, (1) the fresh air system is used to extract the cold that is not beneficial to the user; (2) indoor ventilation is achieved to keep the indoor air fresh; (3) the defrost mode is prevented from running for too long, affecting the user's heating experience; and (4) the frost-containing heat required for the frost formed on the evaporator during defrosting is reduced.

[0140] Control the indoor fan to stop running, in other words, control the indoor air supply motor to stop, and control the four-way valve to switch to the first state;

[0141] Closing the return air filter means controlling the filter to close the air outlet, which can prevent a large amount of water vapor generated by the melting of a large amount of frost retained in the indoor unit from entering the room after defrosting is completed, thus affecting the indoor humidity.

[0142] Step 506: Continue to detect the temperature T4 of the condenser in the first state (ie, the aforementioned third temperature data).

[0143] If it is determined that the third temperature data T4 is greater than or equal to the first set temperature threshold b, the four-way valve is controlled to switch the first state to the second state, that is, the control system exits the cooling mode and switches to the heating mode.

[0144] Step 507: Determine whether the indoor evaporator tube temperature T2 ≥ T1 ambient temperature.

[0145] The fresh air system continues to draw air to the outdoors. When it detects T2≥T1, it indicates that the frost on the evaporator has been completely melted. In response to T2≥T1, the fresh air system maintains the reverse exhaust mode for 30 seconds and then exits the reverse mode, i.e., the first mode.

[0146] Step 508: Completely exit the defrost mode, and the air conditioner operates normally for heating.

[0147] Step 509: Repeat step 501.

[0148] The technical solution provided in this application example can be a reversible fresh air system that can not only take in air, but also exhaust air. It optimizes the defrost mode of the system, achieving a faster defrost effect than the conventional mode while avoiding a large amount of moisture from entering the room.

[0149] like Figure 6 As shown, the air conditioner includes: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device includes: a first mode for transporting indoor air to the outdoors, the operation mode of the air conditioner includes: a heating mode, and the control device 600 of the air conditioner includes: an acquisition module 610 and a control module 620, the acquisition module 610 is used to acquire the working parameters of the air conditioner in the heating mode; the control module 620 is used to control the air conditioner to start the defrost mode for defrosting the first heat exchanger based on the working parameters, and control the fresh air device to operate in the first mode.

[0150] In some embodiments, the air conditioner also includes: an indoor fan, a compressor and a four-way valve. The states of the four-way valve include: a first state for directing the refrigerant of the compressor to flow to the first heat exchanger first. In the defrost mode, the control module 620 is also used to control the indoor fan to stop running and control the four-way valve to switch to the first state.

[0151] In some embodiments, the indoor fan includes: an air outlet, a filter is arranged at the air outlet, and in the defrost mode, the control module 620 is also used to control the filter to close the air outlet.

[0152] In some embodiments, the air conditioner also includes: a second heat exchanger arranged on the indoor side. In the defrost mode, the acquisition module 610 is also used to obtain the first temperature data of the environment in which the air conditioner is located and the second temperature data of the second heat exchanger; the control module 620 is also used to exit the first mode in response to the second temperature data being greater than or equal to the first temperature data, and control the fresh air device to stop running after a set period of time.

[0153] In some embodiments, the air conditioner also includes: a second heat exchanger arranged on the indoor side, the state of the four-way valve also includes: a second state for directing the refrigerant of the compressor to flow to the second heat exchanger first, and in the defrost mode, the acquisition module 610 is also used to obtain third temperature data, and the third temperature data is the temperature data of the first heat exchanger in the first state; the control module 620 is also used to control the four-way valve to switch the first state to the second state if it is determined that the third temperature data is greater than or equal to the first set temperature threshold.

[0154] In some embodiments, the working parameters include: fourth temperature data, the fourth temperature data is the temperature data of the first heat exchanger in the heating mode, and the control device of the air conditioner also includes: a generation module 630, the generation module 630 is used to generate a timing duration based on the fourth temperature data and the second set temperature threshold, and the timing duration is used to characterize the duration of time that the fourth temperature data is less than the second set temperature threshold; the control module 620 is also used to control the air conditioner to start the defrost mode for defrosting the first heat exchanger if it is determined that the timing duration is greater than or equal to the set duration threshold.

[0155] In some embodiments, the operation mode of the fresh air device also includes: a second mode for delivering outdoor air to the indoor room, and the control module 620 is also used to control the fresh air device to operate in the second mode if it is determined that the fourth temperature data is greater than or equal to the second set temperature threshold.

[0156] In actual application, the acquisition module 610, the determination module 620 and the generation module 630 can be implemented by a processor in the control device of the air conditioner. Of course, the processor needs to run the computer program in the memory to realize its function.

[0157] It should be noted that: the control device for the air conditioner provided in the above embodiment only uses the division of the above program modules as an example when controlling the air conditioner. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the control device for the air conditioner provided in the above embodiment and the control method embodiment of the air conditioner belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0158] Based on the hardware implementation of the above program modules and in order to implement the method of the embodiment of the present application, the embodiment of the present application also provides an electronic device. Figure 7 Only an exemplary structure of the electronic device is shown, not all structures, and it can be implemented as needed. Figure 7 Partial or complete structure shown.

[0159] like Figure 7 As shown, the electronic device 700 provided in the embodiment of the present application includes: at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in the electronic device 700 are coupled together through a bus system 705. It can be understood that the bus system 705 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, in Figure 7 Various buses are labeled as bus system 705.

[0160] The user interface 703 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0161] The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the electronic device. Examples of such data include: any computer program used to operate on the electronic device.

[0162] The control method of the air conditioner disclosed in the embodiment of the present application can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the control method of the air conditioner can be completed by the hardware integrated logic circuit or software instructions in the processor 701. The above-mentioned processor 701 can be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the control method of the air conditioner provided in the embodiment of the present application in combination with its hardware.

[0163] In an exemplary embodiment, the electronic device may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0164] It can be understood that the memory 702 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAM bus random access memory (DRRAM, Direct Rambus Random Access Memory).The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0165] In an exemplary embodiment, the present application also provides a storage medium, namely a computer storage medium, which may be a computer-readable storage medium, for example, a memory 702 storing a computer program, and the computer program may be executed by a processor 701 of an electronic device to complete the steps of the method of the present application. The computer-readable storage medium may be a memory such as a ROM, a PROM, an EPROM, an EEPROM, a Flash Memory, a magnetic surface memory, an optical disk, or a CD-ROM.

[0166] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0167] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0168] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner comprises: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device comprises: a first mode for conveying indoor air to the outdoors, the operation mode of the air conditioner comprises: a heating mode, and the method comprises: Acquire the operating parameters of the air conditioner in the heating mode; Based on the working parameters, the air conditioner is controlled to start a defrost mode for defrosting the first heat exchanger, and the fresh air device is controlled to operate in the first mode.

2. The method according to claim 1, characterized in that The air conditioner further includes: an indoor fan, a compressor and a four-way valve, the state of the four-way valve includes: a first state for causing the refrigerant of the compressor to flow to the first heat exchanger first, and in the defrost mode, the method further includes: The indoor fan is controlled to stop running, and the four-way valve is controlled to switch to the first state.

3. The method according to claim 2, characterized in that The indoor fan comprises: an air outlet, a filter screen is arranged at the air outlet, and in the defrost mode, the method further comprises: The filter is controlled to close the air outlet.

4. The method according to claim 1, characterized in that: The air conditioner further includes: a second heat exchanger disposed on the indoor side; in the defrost mode, the method further includes: Acquire first temperature data of the environment in which the air conditioner is located and second temperature data of the second heat exchanger; In response to the second temperature data being greater than or equal to the first temperature data, the first mode is exited, and the fresh air device is controlled to stop running after running for a set period of time.

5. The method according to claim 2, characterized in that: The air conditioner further includes: a second heat exchanger disposed on the indoor side, the state of the four-way valve further includes: a second state for causing the refrigerant of the compressor to flow to the second heat exchanger first, and in the defrost mode, the method further includes: Acquire third temperature data, where the third temperature data is temperature data of the first heat exchanger in the first state; If it is determined that the third temperature data is greater than or equal to the first set temperature threshold, the four-way valve is controlled to switch the first state to the second state.

6. The method according to claim 1, characterized in that The working parameter includes: fourth temperature data, the fourth temperature data is temperature data of the first heat exchanger in the heating mode, and the controlling the air conditioner to start the defrosting mode for defrosting the first heat exchanger based on the working parameter includes: Based on the fourth temperature data and the second set temperature threshold, a timing duration is generated, where the timing duration is used to represent a duration during which the fourth temperature data is less than the second set temperature threshold; If it is determined that the timing duration is greater than or equal to the set duration threshold, the air conditioner is controlled to start a defrosting mode for defrosting the first heat exchanger.

7. The method according to claim 6, characterized in that The operation mode of the fresh air device also includes: a second mode for delivering outdoor air to indoor space, and the method also includes: If it is determined that the fourth temperature data is greater than or equal to the second set temperature threshold, the fresh air device is controlled to operate in the second mode.

8. A control device for an air conditioner, characterized in that: The air conditioner comprises: a fresh air device and a first heat exchanger arranged on the outdoor side, the operation mode of the fresh air device comprises: a first mode for conveying indoor air to the outdoors, the operation mode of the air conditioner comprises: a heating mode, and the device comprises: An acquisition module, used for acquiring the working parameters of the air conditioner in the heating mode; A control module is used to control the air conditioner to start a defrost mode for defrosting the first heat exchanger based on the working parameters, and control the fresh air device to operate in the first mode.

9. An electronic device, characterized in that: include: A processor and a memory for storing a computer program that can be executed on the processor, wherein: The processor is used to execute the steps of the method according to any one of claims 1 to 7 when running a computer program.

10. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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