Control method and device for air conditioner outdoor unit and air conditioner outdoor unit

Abstract

The invention relates to the technical field of air conditioners, and discloses an air conditioner outdoor unit control method which comprises the steps that a defrosting instruction of an air conditioner outdoor unit is obtained; and according to the defrosting instruction of the air conditioner outdoor unit, the air outlet grating is controlled to conduct current, or the cooling fan is controlled to rotate reversely while the air outlet grating is controlled to conduct current. According to the control method and device, the defrosting instruction is obtained, the air outlet grid is controlled to conduct the current according to the defrosting instruction, or the cooling fan is controlled to rotate reversely while the air outlet grid is controlled to conduct the current, control over the air conditioner outdoor unit is matched with the defrosting requirement, the defrosting cost is reduced, and the defrosting efficiency is improved. The invention further discloses a control device for the air conditioner outdoor unit and the air conditioner outdoor unit.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to a control method and device for an air conditioner outdoor unit, and an air conditioner outdoor unit. Background Art

[0002] At present, when air conditioners and other electrical equipment are running in heating conditions, when the surface temperature of the outdoor heat exchanger is lower than 0°C and lower than the dew point temperature of the outdoor air, frost will appear on the surface of the heat exchanger. Frost on the surface of the heat exchanger will increase the heat transfer resistance between the refrigerant and the outdoor air, reduce the heat transfer efficiency of the heat exchanger, and ultimately cause adverse consequences such as reduced cooling capacity and reduced fan performance. Therefore, the heat exchanger needs to be defrosted regularly.

[0003] There is a defrost device in the related technology, which is used for defrosting a heat exchanger. The defrost device is arranged at intervals beside the heat exchanger. The defrost device includes an infrared heating module with a grid structure, and the infrared heating module covers and heats at least one of the surfaces except the air outlet surface of the heat exchanger; wherein the heat exchanger has an air inlet side and an air outlet side facing each other, the air outlet surface is arranged on the air outlet side of the heat exchanger, and the infrared heating module includes a plurality of sub-heating units, and the plurality of sub-heating units are connected in series and / or in parallel to form a grid structure.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] An infrared heating module with a grille structure is additionally arranged on the air inlet side of the heat exchanger. During defrosting, the infrared heating module is only controlled to conduct current to emit heat to defrost the heat exchanger. The operation cannot be accurately matched according to the defrosting requirements, which increases the defrosting cost. In addition, the infrared heating module will block the incoming air flow blowing to the heat exchanger, affecting the heat exchange effect between the heat exchanger and the incoming air flow, and further affecting the overall heating efficiency.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a control method and device for an air-conditioning outdoor unit, and an air-conditioning outdoor unit, so as to simplify the defrost structure of the air-conditioning outdoor unit, match the control of the air-conditioning outdoor unit with its defrost demand, reduce the defrost cost, reduce the influence of the defrost structure on the heat exchange effect, and improve the defrost efficiency.

[0009] In some embodiments, an air conditioner outdoor unit includes: a housing, an air outlet grille, and a heat dissipation fan. A heat dissipation port is arranged on a side wall of the housing, a heat exchanger is arranged inside the housing, and the air outlet grille is arranged inside the heat dissipation port; wherein the air outlet grille is made of a conductive alloy material; the heat dissipation fan is arranged inside the housing, and the air outlet end of the heat dissipation fan is arranged toward the heat dissipation port; a control method for the air conditioner outdoor unit includes:

[0010] Obtain the defrost instruction of the air conditioner outdoor unit;

[0011] The conduction current of the air outlet grille is controlled according to the defrost instruction of the air conditioner outdoor unit, or the conduction current of the air outlet grille is controlled while the reversal of the cooling fan is controlled.

[0012] Optionally, the air outlet grille is controlled to conduct current according to the defrost command of the air conditioner outdoor unit, or the cooling fan is controlled to reverse while the air outlet grille is controlled to conduct current, including: when the defrost command is a first-level defrost command, the air outlet grille is controlled to conduct current; when the defrost command is a second-level defrost command, the air outlet grille is controlled to conduct current while the cooling fan is controlled to reverse.

[0013] Optionally, when the defrost instruction is a secondary defrost instruction, after controlling the air outlet grille to conduct current and controlling the cooling fan to reverse, it also includes: obtaining the coil temperature of the heat exchanger of the air conditioner outdoor unit; controlling the magnitude of the current conducted by the air outlet grille and the speed of the cooling fan reversal according to the temperature range of the coil temperature.

[0014] Optionally, the magnitude of the current conducted by the air outlet grille and the speed at which the cooling fan reverses are controlled according to the temperature range in which the coil temperature is located, including: when the coil temperature is in a first temperature range, controlling the magnitude of the current conducted by the air outlet grille to increase, and controlling the speed at which the cooling fan reverses to increase; when the coil temperature is in a second temperature range, controlling the magnitude of the current conducted by the air outlet grille to decrease, and controlling the speed at which the cooling fan reverses to decrease; wherein the maximum value in the first temperature range is less than the minimum value in the second temperature range.

[0015] Optionally, controlling the conduction current of the air outlet grille according to the defrost instruction of the air conditioner outdoor unit includes: determining the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit; controlling the conduction current of the area of ​​the air outlet grille corresponding to the frosting area according to the defrost instruction of the air conditioner outdoor unit.

[0016] Optionally, obtaining the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit includes: obtaining multiple coil temperatures of multiple areas of the heat exchanger coil, wherein each area corresponds to a coil temperature; determining the lowest coil temperature among the multiple coil temperatures as the target coil temperature, and determining the area corresponding to the target coil temperature as the frosting area.

[0017] Optionally, obtaining a defrost instruction for an outdoor unit of the air conditioner includes: obtaining the coil temperature of a heat exchanger coil of the outdoor unit of the air conditioner and the indoor ambient temperature; determining a temperature difference between the coil temperature and the indoor ambient temperature; and obtaining a defrost instruction for the outdoor unit of the air conditioner when the temperature difference is greater than or equal to a set threshold.

[0018] Optionally, when the temperature difference is greater than or equal to a set threshold, a defrost command for the air conditioner outdoor unit is obtained, including: when the temperature difference is greater than or equal to the set threshold, obtaining the duration; when the duration is greater than or equal to the first set duration, obtaining the defrost command for the air conditioner outdoor unit.

[0019] In some embodiments, a control device for an air conditioner outdoor unit includes: a processor and a memory storing program instructions, and the processor is configured to execute any of the above-mentioned control methods for the air conditioner outdoor unit when running the program instructions.

[0020] In some embodiments, an air conditioner outdoor unit includes: a housing, an air outlet grille, a heat dissipation fan, and a control device for the air conditioner outdoor unit of the above embodiment. A heat dissipation port is arranged on the side wall of the housing, and a heat exchanger is arranged inside; the air outlet grille is arranged inside the heat dissipation port, wherein the air outlet grille is made of a conductive alloy material; the heat dissipation fan is arranged inside the housing, and the air outlet end of the heat dissipation fan is arranged toward the heat dissipation port; the control device for the air conditioner outdoor unit of the above embodiment is installed on the housing.

[0021] The control method and device for an air conditioner outdoor unit and the air conditioner outdoor unit provided in the embodiments of the present disclosure can achieve the following technical effects:

[0022] The air outlet grille of the air conditioner outdoor unit is made of conductive alloy material. The air outlet grille can conduct current to generate heat to defrost the heat exchanger of the air conditioner outdoor unit. There is no need to set up an additional defrosting structure for defrosting, which simplifies the defrosting structure of the air conditioner outdoor unit. The air outlet grille is located on the leeward side of the heat exchanger. Therefore, when the heat exchanger exchanges heat with the incoming air flow, the air outlet grille will not block the incoming air flow, thereby reducing the impact of the defrosting structure on the heat exchange effect. By obtaining the defrost instruction, the air outlet grille is controlled to conduct current according to the defrost instruction, or the air outlet grille is controlled to conduct current while controlling the cooling fan to reverse, so that the control of the air conditioner outdoor unit matches its defrosting demand, reducing the defrosting cost and improving the defrosting efficiency.

[0023] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0025] Figure 1 is a schematic diagram of a control method for an air conditioner outdoor unit provided by an embodiment of the present disclosure;

[0026] Figure 2 is a schematic diagram of another control method for an air conditioner outdoor unit provided by an embodiment of the present disclosure;

[0027] Figure 3 is a schematic diagram of another control method for an air conditioner outdoor unit provided by an embodiment of the present disclosure;

[0028] Figure 4 is a schematic diagram of a control device for an outdoor unit of an air conditioner provided by an embodiment of the present disclosure;

[0029] Figure 5 is a structural schematic diagram of an air conditioner outdoor unit provided by an embodiment of the present disclosure;

[0030] Figure 6 It is a schematic diagram of the structure of the air outlet grille provided in an embodiment of the present disclosure.

[0031] Reference numerals:

[0032] 100. Processor; 101. Memory; 102. Communication Interface; 103. Bus; 200. Control device for air conditioner outdoor unit; 300. Casing; 310. Heat dissipation port; 320. Heat exchanger; 330. Insulating bracket; 400. Air outlet grille; 410. Flow hole; 500. Cooling fan. DETAILED DESCRIPTION

[0033] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0034] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0037] In the embodiments of the present disclosure, smart home appliances refer to home appliances that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliances. They have the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of smart home appliances often relies on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, smart home appliances can be connected to electronic devices to enable users to remotely control and manage the smart home appliances.

[0038] In the disclosed embodiments, the terminal device refers to an electronic device with a wireless connection function. The terminal device can communicate with the above-mentioned smart home appliances by connecting to the Internet, or can communicate with the above-mentioned smart home appliances directly through Bluetooth, WiFi, etc. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built into a hover car, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, etc., or any combination thereof, wherein wearable devices include, for example: smart watches, smart bracelets, pedometers, etc.

[0039] Combination Figure 1 As shown, in one embodiment, a control method for an air conditioner outdoor unit includes:

[0040] S01, the processor obtains a defrost instruction of an air conditioner outdoor unit;

[0041] S02, the processor controls the air outlet grille to conduct current according to the defrost instruction of the air conditioner outdoor unit, or controls the air outlet grille to conduct current while controlling the cooling fan to reverse.

[0042] By adopting the control method for the outdoor unit of the air conditioner provided by the embodiment of the present disclosure, the air outlet grille of the outdoor unit of the air conditioner is made of a conductive alloy material, and the air outlet grille can conduct current to emit heat to defrost the heat exchanger of the outdoor unit of the air conditioner, without the need to set up an additional defrosting structure for defrosting, thereby simplifying the defrosting structure of the outdoor unit of the air conditioner. The air outlet grille is located on the leeward side of the heat exchanger, so when the heat exchanger exchanges heat with the incoming air flow, the air outlet grille will not block the incoming air flow, thereby reducing the impact of the defrosting structure on the heat exchange effect. By obtaining a defrost instruction, controlling the air outlet grille to conduct current according to the defrost instruction, or controlling the air outlet grille to conduct current while controlling the cooling fan to reverse, the control of the outdoor unit of the air conditioner is matched with its defrosting demand, thereby reducing the defrosting cost and improving the defrosting efficiency.

[0043] Combination Figure 2 As shown, in another embodiment, a control method for an air conditioner outdoor unit includes:

[0044] S01, the processor obtains a defrost instruction of an air conditioner outdoor unit;

[0045] S03, the processor controls the four-way valve of the air conditioner outdoor unit to switch direction, and the cooling fan stops rotating;

[0046] S02, the processor controls the air outlet grille to conduct current according to the defrost instruction of the air conditioner outdoor unit, or controls the air outlet grille to conduct current while controlling the cooling fan to reverse.

[0047] Using the control method for the air conditioner outdoor unit provided by the embodiment of the present disclosure, after the processor obtains the defrost instruction, the processor first controls the reversing of the four-way valve of the air conditioner outdoor unit, stops the cooling fan, and the compressor enters the defrost frequency. At this time, the high-temperature and high-pressure refrigerant flows into the heat exchanger of the air conditioner outdoor unit, and the heat exchanger acts as a condenser to condense and release heat, so that the frost on the surface of the heat exchanger is heated and melted. The cooling fan is controlled to stop, and the heat exchange between the heat exchanger and the outside is reduced, so that the heat emitted by the heat exchanger acts efficiently on the frost layer, speeds up the defrost efficiency, and has the effect of pre-defrosting the heat exchanger. The heat of the heat exchanger melts the frost layer in contact with the surface of the heat exchanger in advance, making the frost layer easier to fall off, which is convenient for subsequent defrosting operations.

[0048] Optionally, the processor controls the reversal of the four-way valve of the air conditioner outdoor unit and stops the cooling fan, including: the processor controls the reversal of the four-way valve of the air conditioner outdoor unit, controls the cooling fan to stop, and obtains the cooling fan stop time; when the stop time reaches the set stop time, controls the four-way valve to reverse again, and the cooling fan resumes rotation. In this way, the processor controls the reversal of the four-way valve to stop the cooling fan, uses the refrigerant reversal of the compressor to perform pre-defrosting, and obtains the cooling fan stop time, and when the stop time reaches the set stop time, controls the four-way valve to reverse again, and the cooling fan rotates to resume the evaporation heat absorption process of the heat exchanger, thereby resuming the indoor heating and reducing the impact of the air conditioner outdoor unit defrosting on the indoor environmental comfort.

[0049] Specifically, the set stop time can be 5 minutes. In this way, since the processor controls the reversal of the four-way valve, when the cooling fan stops, the heat exchanger of the air conditioner outdoor unit is used as a condenser for heating, and the heat exchanger on the indoor side is used as an evaporator for cooling, which is bound to affect the indoor ambient temperature. In addition, the outdoor heat exchanger will be dehumidified later by controlling the power supply of the air outlet grille and the reversal of the cooling fan. Therefore, using the outdoor heat exchanger as a condenser for heating and defrosting is only a pre-defrosting operation before defrosting. Therefore, the set stop time is set to 5 minutes, that is, the processor controls the reversal of the four-way valve, and after the cooling fan stops for 5 minutes, it immediately controls the four-way valve to reverse again, and the cooling fan rotates to restore the indoor heating effect in time, which can not only improve the defrosting effect, but also reduce the impact of defrosting on the indoor ambient temperature.

[0050] Optionally, the processor controls the air outlet grille to conduct current according to the defrost instruction of the air conditioner outdoor unit, or controls the air outlet grille to conduct current while controlling the heat dissipation fan to reverse, including: when the defrost instruction is a first-level defrost instruction, the processor controls the air outlet grille to conduct current while controlling the heat dissipation fan to reverse when the defrost instruction is a second-level defrost instruction. In this way, since the defrost operation required for the heat exchanger of the air conditioner outdoor unit is different due to the different degrees of frosting, the air conditioner outdoor unit can be controlled more accurately by obtaining different defrost instructions to control the air conditioner outdoor unit accordingly, so that the response of the air conditioner outdoor unit matches the defrosting demand. When the defrost instruction obtained by the processor is a first-level defrost instruction, the frosting condition of the heat exchanger is relatively light at this time, so the air outlet grille is controlled to conduct current, and the heat emitted by the air outlet grille is radiated to the heat exchanger for defrosting, and the heat dissipation fan operates normally. When the defrost instruction obtained by the processor is a secondary defrost instruction, the frosting condition of the heat exchanger is relatively serious at this time, so the air outlet grille is controlled to conduct current to emit heat, and the cooling fan is controlled to reverse to blow the heat emitted by the air outlet grille to the heat exchanger to improve the defrost efficiency.

[0051] Optionally, when the defrost instruction is a first-level defrost instruction, the processor controls the air outlet grille to conduct current, including: the processor obtains the conduction time of the conduction current of the air outlet grille; when the conduction time reaches a set conduction time, the processor controls the air outlet grille to be powered off. In this way, when the processor obtains the first-level defrost instruction, the processor controls the air outlet grille to be powered on for the set conduction time and then powered off, which can reduce energy consumption while meeting the defrosting demand.

[0052] Specifically, the conduction time is set to 10 minutes.

[0053] Optionally, when the defrost instruction is a secondary defrost instruction, the processor controls the air outlet grille to conduct current while controlling the heat dissipation fan to reverse, including: the processor obtains the conduction time of the conduction current of the air outlet grille; when the conduction time reaches the set conduction time, the processor controls the air outlet grille to be powered off; the processor obtains the power-off time of the air outlet grille, and when the power-off time reaches the set power-off time, the heat dissipation fan is controlled to rotate forward. In this way, the air outlet grille still has residual heat after the air outlet grille is powered off, so the heat dissipation fan is controlled to rotate forward after the air outlet grille is powered off for the set power-off time, and the heat dissipation fan can be used to blow the residual heat of the air outlet grille to the heat exchanger for defrosting, thereby reducing energy consumption.

[0054] Specifically, the power-off duration is set to 5 seconds.

[0055] Optionally, the processor controls the air outlet grille to conduct current, including: the processor controls the current value of the air outlet grille to conduct current to be a first set current value. In this way, when the processor controls the air outlet grille to conduct current, the current value of the air outlet grille is controlled to be the first set current value, which facilitates the subsequent corresponding adjustment of the current value of the air outlet grille.

[0056] Specifically, the processor controls the current value of the current conducted by the air outlet grille to be the first set current value, including: the processor controls the voltage value applied to both ends of the air outlet grille to be the first set voltage value. In this way, the processor controls the current conducted by the air outlet grille to be substantially controlling the voltage applied to both ends of the air outlet grille, and therefore the processor controls the voltage value applied to both ends of the air outlet grille to be the first set voltage value, so that the current value conducted by the air outlet grille is the first set current value.

[0057] Exemplarily, the first set current value may be 1.5A, and the first set voltage value may be 90V.

[0058] Optionally, the processor controls the cooling fan to reverse, including: the processor controls the cooling fan to reverse at a first set speed value. In this way, when the processor controls the cooling fan to reverse, the cooling fan is reversed at the first set speed value, which facilitates subsequent adjustment of the cooling fan's reverse speed.

[0059] Exemplarily, the first set speed value is 200 revolutions per minute.

[0060] It can be understood that no matter whether the defrost instruction obtained by the processor is a first-level defrost instruction or a second-level defrost instruction, the current value controlling the conduction of the air outlet grille is the first set current value, that is, the voltage value applied to both ends of the air outlet grille is the first set voltage value.

[0061] Optionally, when the defrost instruction is a secondary defrost instruction, the processor controls the air outlet grille to conduct current while controlling the cooling fan to reverse, and further includes: the processor obtains the coil temperature of the heat exchanger of the air conditioner outdoor unit; the processor controls the magnitude of the current conducted by the air outlet grille and the speed of the cooling fan reversal according to the temperature range in which the coil temperature is located. In this way, when the heat exchanger of the air conditioner outdoor unit is frosted, the accumulation of the frost layer will cause the coldness of the heat exchanger coil to be unable to be dissipated to the external environment, and the temperature of the heat exchanger coil will be further reduced. Therefore, the thickness of the frost layer on the heat exchanger coil is reflected in the coil temperature, that is, the thicker the frost layer, the lower the coil temperature. In order to improve the defrost efficiency, the magnitude of the conduction current of the air outlet grille and the speed of the cooling fan reversal required for different frost layer thicknesses are different. Therefore, when the processor obtains the secondary defrost instruction and controls the power supply of the air outlet grille, it needs to obtain the temperature of the heat exchanger coil after the cooling fan reverses. According to the temperature range of the coil temperature, it controls the current conducted by the air outlet grille and the reverse speed of the cooling fan. This can control the defrost more accurately, making the control of the air conditioner outdoor unit more compatible with the defrost demand, improving the defrost efficiency while reducing energy consumption.

[0062] Optionally, the processor controls the magnitude of the conduction current of the air outlet grille and the speed of the reverse rotation of the heat dissipation fan according to the temperature interval of the coil temperature, including: when the coil temperature is in the first temperature interval, the processor controls the conduction current of the air outlet grille to increase, and the speed of the reverse rotation of the heat dissipation fan to increase; when the coil temperature is in the second temperature interval, the processor controls the conduction current of the air outlet grille to decrease, and the speed of the reverse rotation of the heat dissipation fan to decrease; wherein the maximum value in the first temperature interval is less than the minimum value in the second temperature interval. In this way, when the coil temperature obtained by the processor is in the relatively low first temperature interval, the temperature of the heat exchanger coil is low, and the frost layer on the surface of the heat exchanger coil is thick. In order to improve the defrosting efficiency, the conduction current of the air outlet grille is controlled to increase, and the speed of the reverse rotation of the heat dissipation fan is increased, and the heat emitted by the air outlet grille is blown to the heat exchanger for defrosting through the reverse rotation of the heat dissipation fan. When the coil temperature obtained by the processor is in a relatively high second temperature range, the temperature of the heat exchanger coil is relatively high and the frost on the surface of the heat exchanger coil is relatively light. In order to reduce energy consumption, the conduction current of the air outlet grille is controlled to be reduced and the reverse speed of the cooling fan is reduced, thereby reducing energy consumption while ensuring defrosting efficiency.

[0063] Specifically, the processor controls the conduction current of the air outlet grille to increase to a second set current value.

[0064] Specifically, the processor controls the conduction current of the air outlet grille to decrease to a third set current value.

[0065] Optionally, the processor controls the conduction current of the air outlet grille to increase, including: the processor controls the voltage applied to both ends of the air outlet grille to increase.

[0066] Specifically, the processor controls the voltage applied to both ends of the air outlet grille to increase to a second set voltage value.

[0067] Optionally, the processor controls the conduction current of the air outlet grille to decrease, including: the processor controls the voltage applied to both ends of the air outlet grille to decrease.

[0068] Specifically, the processor controls the voltage applied across the air outlet grille to decrease to a third set voltage value.

[0069] Specifically, the second set current value is greater than the first set current value, and the first set current value is greater than the third set current value; the second set voltage value is greater than the first set voltage value, and the first set voltage value is greater than the third set voltage value. In this way, when the processor controls the air outlet grille to conduct current, the current value conducted by the air outlet grille at this time is the first set current value of moderate magnitude, and the voltage value applied at both ends is the first set voltage value of moderate magnitude, which facilitates subsequent adjustment of the current value and voltage value of the air outlet grille.

[0070] Specifically, the processor controls the cooling fan to reversely rotate at a speed that increases to a second set speed value.

[0071] Specifically, the processor controls the cooling fan to reversely rotate at a speed reduced to a third set speed value.

[0072] Specifically, the second set speed value is greater than the first set speed value, and the first set speed value is greater than the third set speed value.

[0073] Exemplarily, the second set current value may be 2.5A, the third set current value may be 1A, the second set voltage value may be 150V, the third set voltage value may be 60V, the second set speed value may be 300 rpm, and the third set speed value may be 100 rpm.

[0074] In one embodiment, the processor controls the conduction current of the air outlet grille according to the defrost instruction of the air conditioner outdoor unit, including: the processor determines the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit; the processor controls the regional conduction current of the air outlet grille corresponding to the frosting area according to the defrost instruction of the air conditioner outdoor unit. In this way, when the heat exchanger is frosted, some areas may be severely frosted, while the remaining areas may be slightly frosted. Therefore, the processor first determines the frosting area of ​​the heat exchanger coil, and then controls the regional conduction current of the air outlet grille corresponding to the frosting area to perform corresponding defrosting, so that the control of the air conditioner outdoor unit is more matched with the defrosting demand, thereby reducing energy consumption.

[0075] Optionally, the heat exchanger coil is divided into multiple areas, and the air outlet grille also corresponds to the multiple area divisions of the heat exchanger coil, and each area of ​​the air outlet grille can conduct current independently. In this way, the heat exchanger coil and the air outlet grille are divided into multiple areas, and when a region of the heat exchanger coil is obtained as a frosted region, the heating region corresponding to the region is controlled to conduct current for heating.

[0076] Exemplarily, the heat exchanger coil is divided into a first zone, a second zone, a third zone and a fourth zone, and the zones of the heat exchanger coil corresponding to the air outlet grille are divided into a first heating zone, a second heating zone, a third heating zone and a fourth heating zone, wherein the first heating zone, the second heating zone, the third heating zone and the fourth heating zone can all be independently heated by conducting current; when the frosting area is determined to be the first zone, the first heating zone is controlled to conduct current for heating.

[0077] Optionally, the processor obtains the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit, including: the processor obtains multiple coil temperatures of multiple areas of the heat exchanger coil, wherein each area corresponds to a coil temperature; the processor determines the lowest coil temperature among the multiple coil temperatures as the target coil temperature, and determines the area corresponding to the target coil temperature as the frosting area. In this way, since the temperature of the heat exchanger coil will gradually decrease when it frosts, the processor obtains the coil temperatures of multiple areas of the heat exchanger coil, determines the lowest of the multiple coil temperatures as the target coil temperature, and determines the area corresponding to the target coil temperature as the frosting area, so as to accurately determine the frosting area of ​​the heat exchanger coil, improve defrosting efficiency, and reduce energy consumption.

[0078] Exemplarily, the heat exchanger coil is divided into a first area, a second area, a third area and a fourth area, and the processor obtains the coil temperatures of the first area, the second area, the third area and the fourth area of ​​the heat exchanger coil, wherein the coil temperature of the first area is recorded as the first temperature, the coil temperature of the second area is recorded as the second temperature, the coil temperature of the third area is recorded as the third temperature, and the coil temperature of the fourth area is recorded as the fourth temperature, and the lowest temperature among the first temperature, the second temperature, the third temperature and the fourth temperature is determined to be the target coil temperature. For example, the first temperature is the lowest target coil temperature, and the first area is then determined to be a frosting area.

[0079] Specifically, multiple temperature sensors are set in each area of ​​the heat exchanger coil, and the multiple temperature sensors are evenly distributed in the corresponding area. The processor obtains multiple coil temperatures sent by the multiple temperature sensors, and determines the average value of the multiple coil temperatures as the coil temperature of the area. In this way, by setting multiple temperature sensors in each area of ​​the heat exchanger coil, and obtaining multiple temperature values ​​of the area, and determining the average value as the coil temperature of the area, the accuracy of the obtained coil temperature of the area can be improved, so as to more accurately determine the frosting area.

[0080] It can be understood that when there are multiple lowest coil temperatures among the multiple coil temperatures obtained, the heat exchanger coil areas corresponding to the multiple lowest coil temperatures are all frosted areas.

[0081] Optionally, after the processor controls the area of ​​the air outlet grille corresponding to the frosted area to conduct current according to the defrost instruction of the air conditioner outdoor unit, it also includes: the processor determines whether there is an area to be defrosted in the remaining areas of the heat exchanger coil; when there is an area to be defrosted in multiple areas of the heat exchanger coil and the cooling fan is reversed, the processor controls the speed of the heat dissipation fan to be reversed to increase. In this way, when there is a frosted area in multiple areas of the heat exchanger coil, the remaining areas in the heat exchanger coil are also at risk of frosting, so whether there is an area to be defrosted in multiple areas is obtained. When there is an area to be defrosted, the speed of the cooling fan reversal is controlled to increase, the air intake is increased, and a large amount of heat from the air outlet grille is blown to the heat exchanger coil, so that the remaining areas to be defrosted can also be heated, further improving the defrosting effect of the heat exchanger, and there is no need to control the remaining areas of the air outlet grille to be powered on for heating, further reducing energy consumption.

[0082] Optionally, the processor determines whether there is a to-be-defrosted area in the remaining areas of the heat exchanger coil, including: the processor determines the temperature difference between the coil temperature of the remaining areas of the heat exchanger coil and the target coil temperature; the processor determines the area as the to-be-defrosted area when the temperature difference is less than or equal to the set temperature difference. In this way, the processor determines the temperature difference between the coil temperature of the remaining areas of the heat exchanger coil and the target coil temperature. When the temperature difference is less than or equal to the set temperature difference, the temperature of the remaining areas of the heat exchanger coil is also relatively low at this time, and there is a risk of frost at any time, so the area with the risk of frost is determined as the to-be-defrosted area.

[0083] Specifically, the temperature difference is set to 2°C.

[0084] Combination Figure 3 As shown, in another embodiment, a control method for an air conditioner outdoor unit includes:

[0085] S011, the processor obtains the coil temperature of the heat exchanger coil of the air conditioner outdoor unit and the indoor ambient temperature;

[0086] S012, the processor determines the temperature difference between the coil temperature and the indoor ambient temperature;

[0087] S013, the processor obtains a defrost instruction for the air conditioner outdoor unit when the temperature difference is greater than or equal to a set threshold;

[0088] S02, the processor controls the air outlet grille to conduct current according to the defrost instruction of the air conditioner outdoor unit, or controls the air outlet grille to conduct current while controlling the cooling fan to reverse.

[0089] By adopting the control method for the outdoor unit of the air conditioner provided by the embodiment of the present disclosure, when the heat exchanger coil of the outdoor unit of the air conditioner is frosted, the heat exchange performance of the heat exchanger is affected, and the temperature of the outdoor heat exchanger coil will further drop. The processor obtains the coil temperature of the heat exchanger coil and the indoor ambient temperature. When the temperature difference between the coil temperature and the indoor ambient temperature is greater than or equal to the set threshold, the heat exchanger coil is frosted. Therefore, the defrost instruction of the outdoor unit of the air conditioner is obtained, and the outdoor unit of the air conditioner is controlled to defrost, which can improve the accuracy of judging the frosting of the heat exchanger.

[0090] Optionally, when the temperature difference is greater than or equal to a set threshold, the processor obtains a defrost instruction for the air conditioner outdoor unit, including: the processor determines the difference between the temperature difference and the set threshold; the processor obtains a first-level defrost instruction when the difference is greater than or equal to 0 and less than or equal to 3°C; the processor obtains a second-level defrost instruction when the difference is greater than 3°C. In this way, when the difference between the temperature difference and the set threshold is greater than or equal to 0 and less than or equal to 3°C, the temperature difference between the coil temperature and the indoor ambient temperature is relatively small, and the frosting of the heat exchanger coil is relatively light, so the first-level defrost instruction is obtained, the air outlet grille is controlled to be powered on and heated, and defrosting is performed by heat radiation. When the difference between the temperature difference and the set threshold is greater than 3°C, the temperature difference between the coil temperature and the indoor ambient temperature is relatively large, and the frosting of the heat exchanger coil is relatively serious, so the second-level defrost instruction is obtained, and the air outlet grille is controlled to be powered on and heated, and the heat dissipation fan is controlled to reverse and blow heat to the heat exchanger for efficient defrosting.

[0091] Optionally, the processor obtains a defrost instruction for the air conditioner outdoor unit when the temperature difference is greater than or equal to a set threshold, including: the processor obtains the duration when the temperature difference is greater than or equal to the set threshold; the processor obtains the defrost instruction for the air conditioner outdoor unit when the duration is greater than or equal to a first set duration. In this way, since the air conditioner outdoor unit has the ability to self-regulate, and in order to reduce misjudgments caused by unexpected situations, the processor obtains the duration when the temperature difference is greater than or equal to the set threshold. When the duration is greater than or equal to the first set duration, the heat exchanger is determined to be frosted, so the defrost instruction is obtained, thereby improving the accuracy of the judgment.

[0092] It is understandable that no matter the difference between the temperature difference and the set threshold is greater than or equal to 0 and less than or equal to 3°C, or the difference between the temperature difference and the set threshold is greater than 3°C, it is necessary to determine the duration.

[0093] Exemplarily, the threshold value may be set to 15° C., and the first set time period may be 10 minutes.

[0094] Combination Figure 4 As shown, the embodiment of the present disclosure provides a control device 200 for an air conditioner outdoor unit, including a processor 100 and a memory 101. Optionally, the device may also include a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the control method for the air conditioner outdoor unit of the above embodiment.

[0095] In addition, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0096] The memory 101 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 100 executes the function application and data processing by running the program instructions / modules stored in the memory 101, that is, the control method for the air conditioner outdoor unit in the above embodiment is implemented.

[0097] The memory 101 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 101 may include a high-speed random access memory and may also include a non-volatile memory.

[0098] Combination Figure 5 and Figure 6 As shown, the embodiment of the present disclosure provides an outdoor unit, including: a housing 300, an air outlet grille 400, a heat dissipation fan 500 and the control device 200 for the air conditioner outdoor unit of the above embodiment. The side wall of the housing 300 is provided with a heat dissipation port 310, and a heat exchanger 320 is provided inside; the air outlet grille 400 is arranged inside the heat dissipation port 310, wherein the air outlet grille 400 is made of a conductive alloy material; the heat dissipation fan 500 is arranged inside the housing 300, and the air outlet end of the heat dissipation fan 500 is arranged toward the heat dissipation port 310; the control device 200 for the air conditioner outdoor unit of the above embodiment is installed on the housing 300. The installation relationship described here is not limited to placement inside the product, but also includes installation connection with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. It can be understood by those skilled in the art that the control device 200 for the air conditioner outdoor unit can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0099] The air conditioner outdoor unit provided by the embodiment of the present disclosure is adopted, and the air outlet grille 400 of the air conditioner outdoor unit is made of a conductive alloy material. The air outlet grille 400 can conduct current to emit heat to defrost the heat exchanger 320 of the air conditioner outdoor unit, and there is no need to set up an additional defrosting structure for defrosting, thereby simplifying the defrosting structure of the air conditioner outdoor unit. The air outlet grille 400 is located on the leeward side of the heat exchanger 320, so when the heat exchanger 320 exchanges heat with the incoming air flow, the air outlet grille 400 will not block the incoming air flow, thereby reducing the influence of the defrosting structure on the heat exchange effect. By obtaining a defrosting instruction, the air outlet grille 400 is controlled to conduct current according to the defrosting instruction, or the air outlet grille 400 is controlled to conduct current while the cooling fan 500 is controlled to reverse, so that the control of the air conditioner outdoor unit matches its defrosting demand, reducing the defrosting cost and improving the defrosting efficiency.

[0100] Optionally, the conductive alloy material is a nickel alloy. In this way, the nickel alloy has a thinner processing thickness, relatively less self-loss heat, higher thermal conductivity and thermal diffusivity, and can efficiently convert electrical energy into thermal energy, so that the heat is efficiently dissipated to the heat exchanger 320 for defrosting. Moreover, the temperature of the air outlet grille 400 made of nickel alloy can quickly return to normal temperature, and the thermal efficiency is higher.

[0101] Optionally, the cooling fan 500 is disposed on the windward side of the heat exchanger 320, and the air outlet grille 400 is located on the leeward side of the heat exchanger 320. In this way, the cooling fan 500 can be prevented from blocking the heat radiation of the air outlet grille 400, and the interference of the heat of the air outlet grille 400 on the cooling fan 500 can be reduced.

[0102] Optionally, the air conditioner outer unit further includes: an insulating bracket 330. The insulating bracket 330 is connected to the edge of the heat dissipation port 310, and the air outlet grille 400 is laid on the insulating bracket 330. In this way, the insulating bracket 330 can support the air outlet grille 400 and prevent the current from flowing to the housing 300 to cause interference and waste.

[0103] Optionally, a plurality of honeycomb-shaped flow holes 410 are formed inside the air outlet grille 400. In this way, the contact area between the air outlet grille 400 and the airflow can be increased, and the heat exchange efficiency can be improved. The heat radiation area of ​​the air outlet grille 400 can also be increased to better heat the heat exchanger 320.

[0104] Optionally, the heat dissipation fan 500 is a DC fan. In this way, the air volume is not much different when rotating forward and reverse, thereby ensuring the air volume when back-blowing and defrosting the heat exchanger 320.

[0105] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for an air conditioner outdoor unit.

[0106] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0107] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0108] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0109] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0110] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0111] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A control method for an air conditioner outdoor unit, characterized in that: The air conditioner outdoor unit comprises: a casing, an air outlet grille and a heat dissipation fan; a heat dissipation port is arranged on a side wall of the casing, a heat exchanger is arranged inside the casing, and the air outlet grille is arranged inside the heat dissipation port; wherein the air outlet grille is made of a conductive alloy material; the heat dissipation fan is arranged inside the casing, and the air outlet end of the heat dissipation fan is arranged toward the heat dissipation port; the method comprises: Obtain the defrost instruction of the air conditioner outdoor unit; The conduction current of the air outlet grille is controlled according to the defrost instruction of the air conditioner outdoor unit, or the conduction current of the air outlet grille is controlled while the reversal of the cooling fan is controlled.

2. The method according to claim 1, characterized in that According to the defrost instruction of the air conditioner outdoor unit, the air outlet grille conduction current is controlled, or the cooling fan is reversed while the air outlet grille conduction current is controlled, including: When the defrost command is a first-level defrost command, the air outlet grille is controlled to conduct current; When the defrost command is a secondary defrost command, the air outlet grille is controlled to conduct current while the cooling fan is controlled to reverse.

3. The method according to claim 2, characterized in that When the defrost instruction is a secondary defrost instruction, after controlling the air outlet grille to conduct current and controlling the cooling fan to reverse, the method further includes: Get the coil temperature of the heat exchanger of the air conditioner outdoor unit; The magnitude of the current conducted by the air outlet grille and the speed of the cooling fan reverse rotation are controlled according to the temperature range of the coil temperature.

4. The method according to claim 3, characterized in that According to the temperature range of the coil temperature, the current of the air outlet grille is controlled, as well as the speed of the cooling fan reverse, including: When the coil temperature is in the first temperature range, the conduction current of the air outlet grille is controlled to increase, and the speed of the heat dissipation fan is controlled to increase; When the coil temperature is in the second temperature range, the conduction current of the air outlet grille is controlled to decrease, and the speed of the heat dissipation fan is controlled to decrease; The maximum value in the first temperature interval is smaller than the minimum value in the second temperature interval.

5. The method according to any one of claims 1 to 4, characterized in that: Controlling the conduction current of the air outlet grille according to the defrost instruction of the air conditioner outdoor unit, including: Determine the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit; According to the defrost command of the air conditioner outdoor unit, the regional conduction current of the air outlet grille corresponding to the frosted area is controlled.

6. The method according to claim 5, characterized in that Get the frosting area of ​​the heat exchanger coil of the air conditioner outdoor unit, including: Obtain multiple coil temperatures of multiple zones of a heat exchanger coil, wherein each zone corresponds to a coil temperature; The lowest coil temperature among the multiple coil temperatures is determined as the target coil temperature, and the area corresponding to the target coil temperature is determined as the frosting area.

7. The method according to any one of claims 1 to 4, characterized in that: Get the defrost command of the air conditioner outdoor unit, including: Obtain the coil temperature of the heat exchanger coil of the air conditioner outdoor unit and the indoor ambient temperature; Determine the temperature difference between the coil temperature and the indoor ambient temperature; When the temperature difference is greater than or equal to the set threshold, a defrost instruction for the air conditioner outdoor unit is obtained.

8. The method according to claim 7, characterized in that When the temperature difference is greater than or equal to the set threshold, a defrost instruction for the air conditioner outdoor unit is obtained, including: When the temperature difference is greater than or equal to the set threshold, obtain the duration; When the duration is greater than or equal to the first set duration, a defrost instruction for the air conditioner outdoor unit is obtained.

9. A control device for an air conditioner outdoor unit, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the control method for the air conditioner outdoor unit according to any one of claims 1 to 8 when running the program instructions.

10. An air conditioner outdoor unit, characterized in that: include: The housing (300) has a heat dissipation port (310) disposed on its side wall and a heat exchanger (320) disposed inside. An air outlet grille (400) is arranged in the heat dissipation port (310), wherein the air outlet grille (400) is made of a conductive alloy material; A heat dissipation fan (500) is disposed inside the housing (300), and an air outlet end of the heat dissipation fan (500) is disposed toward the heat dissipation port (310); The control device (200) for the outdoor unit of an air conditioner as claimed in claim 9 is mounted on a casing (300).

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