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

Abstract

The application relates to the air conditioning technical field and discloses a control method for an air conditioner outdoor unit, which comprises the following steps: obtaining a defrosting instruction of the air conditioner outdoor unit; and controlling the on-current of an air outlet grille according to the defrosting instruction of the air conditioner outdoor unit, or controlling the on-current of the air outlet grille and reversely rotating a heat dissipation fan at the same time. In the application, the defrosting instruction is obtained, the on-current of the air outlet grille is controlled according to the defrosting instruction, or the on-current of the air outlet grille and the reversely rotating of the heat dissipation fan are controlled at the same time, so that the control of the air conditioner outdoor unit is matched with the defrosting demand of the air conditioner outdoor unit, the defrosting cost is reduced, and the defrosting efficiency is improved. The application 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 conditioners, for example to a control method and device for an air conditioner outdoor unit and an air conditioner outdoor unit. BACKGROUND

[0002] At present, when an electric appliance such as an air conditioner is running in a heating condition, frost will appear on the surface of the heat exchanger when the surface temperature of the heat exchanger is lower than 0℃ and lower than the dew point temperature of outdoor air. Frost on the surface of the heat exchanger will increase the heat transfer resistance between the refrigerant and outdoor air, reduce the heat transfer efficiency of the heat exchanger, and ultimately cause adverse consequences such as a decrease in refrigerating capacity and fan performance degradation. Therefore, the heat exchanger needs to be defrosted regularly.

[0003] There is a defrosting device in the related art for defrosting a heat exchanger. The defrosting device is arranged at intervals on the side of the heat exchanger. The defrosting device includes an infrared heating module in a grid structure and the infrared heating module covers and heats at least one of the surfaces other than the air outlet surface of the heat exchanger. 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. The infrared heating module includes a plurality of sub-heating units 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 at least the following problems exist in the related art:

[0005] The infrared heating module in a grid structure is additionally arranged on the air inlet side of the heat exchanger. During defrosting, only the infrared heating module is controlled to pass current to generate heat to defrost the heat exchanger. The operation cannot be matched accurately according to the defrosting requirement, which increases the defrosting cost. In addition, the infrared heating module will block the air flow blown to the heat exchanger, affecting the heat exchange effect of the heat exchanger and the air flow, and further affecting the overall heating efficiency.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, the following brief summary is given. The summary is not an overall description of the application, nor is it intended to determine key / important elements or delineate the scope of these embodiments. It is intended as a prelude to the detailed description below.

[0008] The control method and device for the air conditioner outdoor unit and the air conditioner outdoor unit provided by the embodiments of the present disclosure simplify the defrosting structure of the air conditioner outdoor unit, match the control of the air conditioner outdoor unit with the defrosting demand of the air conditioner outdoor unit, reduce the defrosting cost, reduce the influence of the defrosting structure on the heat exchange effect, and improve the defrosting efficiency.

[0009] In some embodiments, the air conditioner outdoor unit comprises a shell, an air outlet grille and a heat dissipation fan. A side wall of the shell is provided with a heat dissipation opening, an inner part of the shell is provided with a heat exchanger, and the air outlet grille is arranged in the heat dissipation opening. The air outlet grille is made of a conductive alloy material. The heat dissipation fan is arranged in the inner part of the shell, and an air outlet end of the heat dissipation fan is arranged towards the heat dissipation opening. The control method for the air conditioner outdoor unit comprises the following steps:

[0010] obtaining a defrosting instruction of the air conditioner outdoor unit;

[0011] controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, or controlling the air outlet grille to conduct current and controlling the heat dissipation fan to reverse at the same time.

[0012] Optionally, the step of controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, or controlling the air outlet grille to conduct current and controlling the heat dissipation fan to reverse at the same time comprises: in the case that the defrosting instruction is a first-level defrosting instruction, controlling the air outlet grille to conduct current; and in the case that the defrosting instruction is a second-level defrosting instruction, controlling the air outlet grille to conduct current and controlling the heat dissipation fan to reverse at the same time.

[0013] Optionally, in the case that the defrosting instruction is a second-level defrosting instruction, after the step of controlling the air outlet grille to conduct current and controlling the heat dissipation fan to reverse at the same time, the method further comprises: obtaining a coil temperature of the heat exchanger of the air conditioner outdoor unit; and controlling the size of the current conducted by the air outlet grille and the speed of the heat dissipation fan according to the temperature range in which the coil temperature is located.

[0014] Optionally, the step of controlling the size of the current conducted by the air outlet grille and the speed of the heat dissipation fan according to the temperature range in which the coil temperature is located comprises: in the case that the coil temperature is located in a first temperature range, controlling the current conducted by the air outlet grille to increase and the speed of the heat dissipation fan to increase; and in the case that the coil temperature is located in a second temperature range, controlling the current conducted by the air outlet grille to decrease and the speed of the heat dissipation fan to decrease. The maximum value in the first temperature range is less than the minimum value in the second temperature range.

[0015] Optionally, the step of controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit comprises: determining a frosting area of the coil of the heat exchanger of the air conditioner outdoor unit; and controlling the air outlet grille to conduct current in the area corresponding to the frosting area according to the defrosting instruction of the air conditioner outdoor unit.

[0016] Optionally, the frost area of the heat exchanger coil of the air conditioner outdoor unit is obtained, including: 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 in the multiple coil temperatures as a target coil temperature, and determining the area corresponding to the target coil temperature as the frost area.

[0017] Optionally, the defrosting instruction of the air conditioner outdoor unit is obtained, including: obtaining a coil temperature of a heat exchanger coil of the air conditioner outdoor unit and an indoor environment temperature; determining a temperature difference between the coil temperature and the indoor environment temperature; and obtaining the defrosting instruction of the air conditioner outdoor unit in a case where the temperature difference is greater than or equal to a set threshold.

[0018] Optionally, the defrosting instruction of the air conditioner outdoor unit is obtained in a case where the temperature difference is greater than or equal to the set threshold, including: obtaining a continuous duration in the case where the temperature difference is greater than or equal to the set threshold; and obtaining the defrosting instruction of the air conditioner outdoor unit in a case where the continuous duration is greater than or equal to a first set duration.

[0019] In some embodiments, a control device for an air conditioner outdoor unit includes a processor and a memory storing program instructions, the processor being configured to execute the control method for the air conditioner outdoor unit of any of the above embodiments 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 the control device for the air conditioner outdoor unit of the above embodiments. The housing side wall is provided with a heat dissipation opening, and the inside is provided with a heat exchanger; the air outlet grille is arranged in the heat dissipation opening, wherein the air outlet grille is made of an electrically conductive alloy material; the heat dissipation fan is arranged inside the housing, and the air outlet end of the heat dissipation fan is arranged towards the heat dissipation opening; and the control device for the air conditioner outdoor unit of the above embodiments is mounted on the housing.

[0021] The control method and device for the air conditioner outdoor unit, and the air conditioner outdoor unit provided by 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 an electrically conductive alloy material, which can conduct current to generate heat to defrost the heat exchanger of the air conditioner outdoor unit, without the need for additional defrosting structure to defrost, thereby simplifying the defrosting structure of the air conditioner outdoor unit. The air outlet grille is located on the leeward side of the heat exchanger, so that the air outlet grille does not block the incoming air flow when the heat exchanger exchanges heat with the incoming air flow, thereby reducing the influence of the defrosting structure on the heat exchange effect. By obtaining the defrosting instruction, the air outlet grille is controlled to conduct current according to the defrosting instruction, or the air outlet grille is controlled to conduct current and the heat dissipation fan is controlled to reverse at the same time, so that the control of the air conditioner outdoor unit matches the defrosting demand, thereby reducing the defrosting cost and improving the defrosting efficiency.

[0023] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0025] Figure 1 This is a schematic diagram of a control method for an outdoor unit of an air conditioner provided in an embodiment of this disclosure;

[0026] Figure 2 This is a schematic diagram of another control method for an air conditioner outdoor unit provided in an embodiment of this disclosure;

[0027] Figure 3 This is a schematic diagram of another control method for an air conditioner outdoor unit provided in an embodiment of this disclosure;

[0028] Figure 4 This is a schematic diagram of a control device for an outdoor unit of an air conditioner provided in an embodiment of this disclosure;

[0029] Figure 5 This is a schematic diagram of the structure of an air conditioner outdoor unit provided in an embodiment of this disclosure;

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

[0031] Figure label:

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

[0033] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0034] The terms "first", "second", and the like in the description and in the claims of the embodiments of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to describe the embodiments of the present disclosure herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] Unless otherwise specified, the term "a plurality of" means two or more.

[0036] The term "corresponding" can refer to an association or binding relationship. A and B correspond to each other means that there is an association or binding relationship between A and B.

[0037] In the embodiments of the present disclosure, the smart home appliance refers to a home appliance product formed after introducing microprocessors, sensor technology, network communication technology into home appliances, having the characteristics of intelligent control, intelligent perception and intelligent application. The operation process of the smart home appliance often depends on the application and processing of modern technologies such as the Internet of Things, the Internet and electronic chips. For example, the smart home appliance can realize remote control and management of the smart home appliance by connecting electronic devices.

[0038] In the embodiments of the present disclosure, the terminal device refers to an electronic device with wireless connection function. The terminal device can be connected to the Internet and communicate with the smart home appliance as described above, or can directly communicate with the smart home appliance as described above through Bluetooth, wifi and the like. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a built-in vehicle device in a hovercar, or any combination thereof. The mobile device may, for example, include a mobile phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, or any combination thereof, wherein the wearable device may, for example, include a smart watch, a smart bracelet, a pedometer, and the like.

[0039] In combination Figure 1 As shown in the figure, in one embodiment, the control method for the air conditioner outdoor unit comprises:

[0040] S01, the processor acquires the defrosting instruction of the air conditioner outdoor unit;

[0041] S02, the processor controls the current of the air outlet grid according to the defrosting instruction of the air conditioner outdoor unit, or controls the current of the air outlet grid and reverses the cooling fan at the same time.

[0042] The control method for the air conditioner outdoor unit provided by the embodiment of the present disclosure is used to make the air outlet grille of the air conditioner outdoor unit made of conductive alloy material, and the air outlet grille can conduct current to generate heat to defrost the heat exchanger of the air conditioner outdoor unit, without the need to additionally set a defrosting structure to defrost, thereby simplifying the defrosting structure of the air conditioner outdoor unit. The air outlet grille is located at the leeward side of the heat exchanger, so that 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 influence of the defrosting structure on the heat exchange effect. By obtaining the defrosting instruction, the air outlet grille is controlled to conduct current according to the defrosting instruction, or the air outlet grille is controlled to conduct current while the cooling fan is controlled to reverse, so that the control of the air conditioner outdoor unit matches the defrosting demand thereof, thereby reducing the defrosting cost and improving the defrosting efficiency.

[0043] In combination Figure 2 As shown in another embodiment, the control method for the air conditioner outdoor unit comprises:

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

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

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

[0047] The control method for the air conditioner outdoor unit provided by the embodiment of the present disclosure is used to make the air outlet grille of the air conditioner outdoor unit made of conductive alloy material, and the air outlet grille can conduct current to generate heat to defrost the heat exchanger of the air conditioner outdoor unit, without the need to additionally set a defrosting structure to defrost, thereby simplifying the defrosting structure of the air conditioner outdoor unit. The air outlet grille is located at the leeward side of the heat exchanger, so that 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 influence of the defrosting structure on the heat exchange effect. By obtaining the defrosting instruction, the air outlet grille is controlled to conduct current according to the defrosting instruction, or the air outlet grille is controlled to conduct current while the cooling fan is controlled to reverse, so that the control of the air conditioner outdoor unit matches the defrosting demand thereof, thereby reducing the defrosting cost and improving the defrosting efficiency.

[0048] Optionally, the processor controls the reversing of the four-way valve of the air conditioner outdoor unit and the stopping of the heat dissipation fan, including: the processor controls the reversing of the four-way valve of the air conditioner outdoor unit and controls the stopping of the heat dissipation fan, and at the same time, the stopping time of the heat dissipation fan is obtained; in the case that the stopping time reaches the set stopping time, the four-way valve is controlled to reverse again, and the heat dissipation fan is controlled to rotate again. In this way, the processor controls the reversing of the four-way valve and the stopping of the heat dissipation fan, and at the same time, the stopping time of the heat dissipation fan is obtained by using the refrigerant reversing of the compressor to pre-defrost, and in the case that the stopping time reaches the set stopping time, the four-way valve is controlled to reverse again, and the heat dissipation fan is controlled to rotate to restore the evaporation heat absorption process of the heat exchanger, thereby restoring the heating of the indoor and reducing the influence of the defrosting of the air conditioner outdoor unit on the indoor environmental comfort.

[0049] Specifically, the set stopping time can be 5 minutes. In this way, when the processor controls the reversing of the four-way valve and the stopping of the heat dissipation fan, the heat exchanger of the air conditioner outdoor unit works as a condenser to heat, and the heat exchanger on the indoor side works as an evaporator to cool, which will inevitably affect the indoor environmental temperature. Moreover, subsequent dehumidification operation will be performed on the outdoor side heat exchanger by controlling the power-on of the air outlet grille and the reverse rotation of the heat dissipation fan, so that the outdoor side heat exchanger works as a condenser to heat and defrost, which is only a pre-defrosting operation before the defrosting operation. Therefore, the set stopping time is set to 5 minutes, that is, after the processor controls the reversing of the four-way valve and the stopping of the heat dissipation fan for 5 minutes, the four-way valve is controlled to reverse again and the heat dissipation fan is controlled to rotate, so as to restore the heating effect of the indoor in time, which can improve the defrosting effect and reduce the influence of the defrosting on the indoor environmental temperature.

[0050] Optionally, the processor controls the power-on of the air outlet grille according to the defrosting instruction of the air conditioner outdoor unit, or controls the power-on of the air outlet grille and the reverse rotation of the heat dissipation fan at the same time, including: the processor controls the power-on of the air outlet grille in the case that the defrosting instruction is a first-level defrosting instruction; the processor controls the power-on of the air outlet grille and the reverse rotation of the heat dissipation fan at the same time in the case that the defrosting instruction is a second-level defrosting instruction. In this way, since the required defrosting operation is different due to the different frosting degrees of the heat exchanger of the air conditioner outdoor unit, the air conditioner outdoor unit is controlled according to different defrosting instructions, so that the air conditioner outdoor unit can be controlled more accurately, and the response of the air conditioner outdoor unit can be matched with the defrosting demand. When the processor obtains the first-level defrosting instruction, the frosting condition of the heat exchanger is relatively light at this time, so the power-on of the air outlet grille is controlled to radiate heat to the heat exchanger to defrost, and the heat dissipation fan operates normally. When the processor obtains the second-level defrosting instruction, the frosting condition of the heat exchanger is relatively serious at this time, so the power-on of the air outlet grille is controlled to radiate heat, and the reverse rotation of the heat dissipation fan is controlled to blow the heat radiated by the air outlet grille to the heat exchanger, thereby improving the defrosting efficiency.

[0051] Optionally, the processor controls the out-air grille to conduct current in the case that the defrosting instruction is a first-level defrosting instruction, and the controlling comprises: the processor acquires a conduction duration of the out-air grille conducting current; and the processor controls the out-air grille to be powered off in the case that the conduction duration reaches a set conduction duration. In this way, the processor controls the out-air grille to be powered off after the out-air grille conducts current for the set conduction duration in the case that the defrosting instruction is a first-level defrosting instruction, so that the defrosting requirement can be met while the energy consumption is reduced.

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

[0053] Optionally, the processor controls the out-air grille to conduct current in the case that the defrosting instruction is a second-level defrosting instruction, and the controlling comprises: the processor acquires a conduction duration of the out-air grille conducting current; the processor controls the out-air grille to be powered off in the case that the conduction duration reaches a set conduction duration; and the processor acquires a power-off duration of the out-air grille and controls the heat dissipation fan to rotate in a normal direction in the case that the power-off duration reaches a set power-off duration. In this way, the out-air grille still has residual heat after being powered off, so that the heat dissipation fan is controlled to rotate in the normal direction after the out-air grille is powered off for the set power-off duration, so that the residual heat of the out-air grille can be blown to the heat exchanger by the heat dissipation fan for defrosting, and the energy consumption is reduced.

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

[0055] Optionally, the processor controls the out-air grille to conduct current, and the controlling comprises: the processor controls a current value of the out-air grille conducting current to be a first set current value. In this way, the processor controls the current value of the out-air grille conducting current to be the first set current value when the processor controls the out-air grille to conduct current, so that the current value of the out-air grille can be adjusted correspondingly in the subsequent process.

[0056] Specifically, the processor controls the current value of the out-air grille conducting current to be the first set current value, and the controlling comprises: the processor controls a voltage value applied to both ends of the out-air grille to be a first set voltage value. In this way, the processor controls the voltage value applied to both ends of the out-air grille when the processor controls the out-air grille to conduct current, so that the processor controls the voltage value applied to both ends of the out-air grille to be the first set voltage value, so that the current value of the out-air grille conducting current is the first set current value.

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

[0058] Optionally, the processor controls the heat dissipation fan to rotate in a reverse direction, and the controlling comprises: the processor controls a rotating speed of the heat dissipation fan rotating in the reverse direction to be a first set rotating speed value. In this way, the processor controls the rotating speed of the heat dissipation fan rotating in the reverse direction to be the first set rotating speed value when the processor controls the heat dissipation fan to rotate in the reverse direction, so that the rotating speed of the heat dissipation fan rotating in the reverse direction can be adjusted in the subsequent process.

[0059] For example, the first set rotation speed value is 200 rotations per minute.

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

[0061] Optionally, after the processor controls the current of the air outlet grille and the reverse rotation of the heat dissipation fan in the case that the defrosting instruction is the second-level defrosting instruction, the processor further obtains the temperature of the coil of the heat exchanger of the air conditioner outdoor unit, and controls the current of the air outlet grille and the rotation speed of the reverse rotation of the heat dissipation fan 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 cold energy of the coil of the heat exchanger to be unable to be dissipated to the external environment, and the temperature of the coil of the heat exchanger will be further reduced. Therefore, the thickness of the frost layer of the coil of the heat exchanger is reflected on the coil temperature, that is, the thicker the frost layer, the lower the temperature of the coil. In order to improve the defrosting efficiency, the current of the air outlet grille and the rotation speed of the reverse rotation of the heat dissipation fan required for the defrosting of the frost layer of different thicknesses are different. Therefore, after the processor obtains the second-level defrosting instruction and controls the current of the air outlet grille and the reverse rotation of the heat dissipation fan, the temperature of the coil of the heat exchanger needs to be obtained, and the current of the air outlet grille and the rotation speed of the reverse rotation of the heat dissipation fan are controlled according to the temperature range in which the coil temperature is located, so that the defrosting control can be more accurate, the control of the air conditioner outdoor unit can be more matched with the defrosting demand, the defrosting efficiency can be improved, and the energy consumption can be reduced.

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

[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 includes that the processor controls the voltage applied across the air outlet grille to increase.

[0066] Specifically, the processor controls the voltage applied across 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 includes that the processor controls the voltage applied across 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; and 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, since the processor controls the conduction current of the air outlet grille, the current value of the air outlet grille at this time is the first set current value which is moderate in size, and the voltage value applied across the air outlet grille is the first set voltage value which is moderate in size, so that the current value and the voltage value of the air outlet grille are convenient for subsequent adjustment.

[0070] Specifically, the processor controls the rotation speed of the heat dissipation fan to increase to a second set rotation speed value.

[0071] Specifically, the processor controls the rotation speed of the heat dissipation fan to decrease to a third set rotation speed value.

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

[0073] Specifically, the second set current value can be 2.5 A, the third set current value can be 1 A, the second set voltage value can be 150 V, the third set voltage value can be 60 V, the second set rotation speed value can be 300 revolutions per minute, and the third set rotation speed value can be 100 revolutions per minute.

[0074] In one embodiment, the processor controls the conduction current of the air outlet grille according to the defrosting 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; and the processor controls the conduction current of the area corresponding to the frosting area of the air outlet grille according to the defrosting instruction of the air conditioner outdoor unit. In this way, when the heat exchanger frosts, there may be a phenomenon that some areas frost seriously and the remaining areas frost slightly. Therefore, the processor first determines the frosting area of the heat exchanger coil, and then controls the conduction current of the area corresponding to the frosting area of the air outlet grille to perform corresponding defrosting, so that the control of the air conditioner outdoor unit is more matched with the defrosting demand, and the energy consumption is reduced.

[0075] Optionally, the heat exchanger coil is divided into multiple areas, and the air outlet grille is also divided into multiple areas corresponding to the multiple areas of the heat exchanger coil, and each area of the air outlet grille can independently conduct current. In this way, the heat exchanger coil and the air outlet grille are both divided into multiple areas, and when it is obtained that one area of the heat exchanger coil is a frosting area, the conduction current of the heating area corresponding to the area is controlled to perform heating.

[0076] For example, the heat exchanger coil is divided into a first area, a second area, a third area and a fourth area, and the air outlet grille is divided into a first heating area, a second heating area, a third heating area and a fourth heating area corresponding to the division of the heat exchanger coil, wherein the first heating area, the second heating area, the third heating area and the fourth heating area can independently conduct current to heat; in the case where the determined frosting area is the first area, the conduction current of the first heating area is controlled to perform 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 one coil temperature; the processor determines the lowest coil temperature in the multiple coil temperatures as a 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 gradually decreases when it frosts, the processor can accurately determine the frosting area of the heat exchanger coil by obtaining the coil temperatures of multiple areas of the heat exchanger coil, determining the lowest coil temperature in the multiple coil temperatures as a target coil temperature, and determining the area corresponding to the target coil temperature as the frosting area, thereby improving the defrosting efficiency and reducing the energy consumption.

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

[0079] Specifically, a plurality of temperature sensors are arranged in each region of the heat exchanger coil, and the plurality of temperature sensors are uniformly distributed in the corresponding region. The processor acquires a plurality of coil temperatures sent by the plurality of temperature sensors, and determines the average value of the plurality of coil temperatures as the coil temperature of the region. In this way, by arranging a plurality of temperature sensors in each region of the heat exchanger coil, and determining the average value of the plurality of temperature values in the region as the coil temperature of the region, the accuracy of the acquired coil temperature of the region can be improved, so that the frosting region can be determined more accurately.

[0080] It can be understood that when there are a plurality of lowest coil temperatures in the acquired plurality of coil temperatures, the heat exchanger coil regions corresponding to the plurality of lowest coil temperatures are all frosting regions.

[0081] Alternatively, the processor controls the area of the frosting region to conduct current after the processor controls the area of the frosting region to conduct current according to the defrosting instruction of the air conditioner outdoor unit, and further comprises: the processor determines whether there is a defrosting region in the remaining regions of the heat exchanger coil; and the processor controls the rotation speed of the heat dissipation fan to increase in the case that there is a defrosting region in the plurality of regions of the heat exchanger coil and the heat dissipation fan is reversed. In this way, when there is a frosting region in the plurality of regions of the heat exchanger coil, the remaining regions of the heat exchanger coil also have a frosting risk, so it is necessary to acquire whether there is a defrosting region in the plurality of regions. When there is a defrosting region, the rotation speed of the heat dissipation fan is controlled to increase, the air inlet amount is increased, and the heat of the air outlet grille is blown to the heat exchanger coil in a large amount, so that the remaining defrosting region can also be heated, the defrosting effect of the heat exchanger is further improved, and the remaining regions of the air outlet grille do not need to be controlled to conduct current and heat, thereby further reducing the energy consumption.

[0082] Optionally, the processor determines whether the remaining area of the heat exchanger coil is a defrosting area, comprising: the processor determines a temperature difference between the coil temperature of the remaining area of the heat exchanger coil and the target coil temperature; and the processor determines that the area is a defrosting area when the temperature difference is less than or equal to a set temperature difference. In this way, the processor determines the temperature difference between the coil temperature of the remaining area of the heat exchanger coil and the target coil temperature, and when the temperature difference is less than or equal to the set temperature difference, the temperature of the remaining area of the heat exchanger coil is also relatively low at this time, and is at risk of frosting at any time, so the area at risk of frosting is determined to be a defrosting area.

[0083] Specifically, the set temperature difference is 2℃.

[0084] In combination Figure 3 As shown in FIG. 1, in another embodiment, a control method for an air conditioner outdoor unit comprises:

[0085] S011, the processor acquires a coil temperature of a heat exchanger coil of the air conditioner outdoor unit and an indoor environment temperature;

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

[0087] S013, the processor acquires a defrosting instruction of the air conditioner outdoor unit when the temperature difference is greater than or equal to a set threshold value;

[0088] S02, the processor controls the outflow grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, or controls the outflow grille to conduct current and controls the heat dissipation fan to reverse at the same time.

[0089] When the heat exchanger coil of the air conditioner outdoor unit frosts, the heat exchange performance of the heat exchanger is affected, and the temperature of the heat exchanger coil on the outdoor side will further decrease. The processor acquires the coil temperature of the heat exchanger coil and the indoor environment temperature, and when the temperature difference between the coil temperature and the indoor environment temperature is greater than or equal to the set threshold value, the heat exchanger coil has frosting phenomenon at this time, so the defrosting instruction of the air conditioner outdoor unit is acquired, and the air conditioner outdoor unit is controlled to defrost, which can improve the judgment accuracy of the heat exchanger frosting.

[0090] Optionally, the processor obtains the defrosting instruction of the air conditioner outdoor unit when the temperature difference is greater than or equal to the set threshold value, including: the processor determines the difference between the temperature difference and the set threshold value; the processor obtains a first defrosting instruction when the difference is greater than or equal to 0 and less than or equal to 3℃; the processor obtains a second defrosting instruction when the difference is greater than 3℃. In this way, when the difference between the temperature difference and the set threshold value is greater than or equal to 0 and less than or equal to 3℃, the temperature difference between the coil temperature and the indoor environment temperature is relatively small, and the frosting condition of the heat exchanger coil is relatively light, so the first defrosting instruction is obtained to control the power-on heating of the air outlet grille and defrosting by heat radiation. When the difference between the temperature difference and the set threshold value is greater than 3℃, the temperature difference between the coil temperature and the indoor environment temperature is relatively large, and the frosting condition of the heat exchanger coil is relatively serious, so the second defrosting instruction is obtained to control the power-on heating of the air outlet grille and the reverse rotation of the heat dissipation fan to blow heat to the heat exchanger for efficient defrosting.

[0091] Optionally, the processor obtains the defrosting instruction of the air conditioner outdoor unit when the temperature difference is greater than or equal to the set threshold value, including: the processor obtains the duration when the temperature difference is greater than or equal to the set threshold value; the processor obtains the defrosting instruction of the air conditioner outdoor unit when the duration is greater than or equal to the first set duration. In this way, since the air conditioner outdoor unit has the ability of self-regulation, and in order to reduce the misjudgment caused by unexpected situations, the processor obtains the duration when the temperature difference is greater than or equal to the set threshold value, and when the duration is greater than or equal to the first set duration, the heat exchanger determines that frosting occurs, so the defrosting instruction is obtained, improving the accuracy of the judgment.

[0092] It can be understood that whether the difference between the temperature difference and the set threshold value is greater than or equal to 0 and less than or equal to 3℃, or the difference between the temperature difference and the set threshold value is greater than 3℃, the duration needs to be judged.

[0093] For example, the set threshold value can be 15℃, and the first set duration can be 10 minutes.

[0094] In combination with Figure 4 As shown in the figure, 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 can also include a communication interface 102 and a bus 103. Wherein the processor 100, the communication interface 102, the memory 101 can complete the communication among each other through the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can call the logical instructions in the memory 101 to execute the control method for the air conditioner outdoor unit of the above-mentioned embodiment.

[0095] In addition, the logical instructions in the memory 101 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium.

[0096] The memory 101 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiments of the present disclosure. The processor 100 executes the program instructions / modules stored in the memory 101, thereby performing functional applications and data processing, that is, implementing the control method for the air conditioner outdoor unit in the above embodiments.

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

[0098] In combination with FIGS. 1-4, Figure 5 and Figure 6 As shown in the above embodiments, the present disclosure provides an outdoor unit, which comprises: a shell 300, an air outlet grille 400, a heat dissipation fan 500, and the control device 200 for the air conditioner outdoor unit. The shell 300 is provided with a heat dissipation opening 310 on the side wall, and a heat exchanger 320 is arranged inside; the air outlet grille 400 is arranged in the heat dissipation opening 310, wherein the air outlet grille 400 is made of an electrically conductive alloy material; the heat dissipation fan 500 is arranged inside the shell 300, and the air outlet end of the heat dissipation fan 500 is arranged towards the heat dissipation opening 310; and the control device 200 for the air conditioner outdoor unit is mounted on the shell 300. The mounting relationship described herein is not limited to placing inside the product, but also includes mounting connection with other components of the product, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand 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 made of the electrically conductive alloy material, the air outlet grille 400 can conduct current to generate heat to defrost the heat exchanger 320, and no additional defrosting structure is needed to defrost, thereby simplifying the defrosting structure of the air conditioner outdoor unit. The air outlet grille 400 is located at the leeward side of the heat exchanger 320, so that the air outlet grille 400 does not block the incoming air flow when the heat exchanger 320 exchanges heat with the incoming air flow, thereby reducing the influence of the defrosting structure on the heat exchange effect. By obtaining the defrosting instruction, the current conducted by the air outlet grille 400 is controlled according to the defrosting instruction, or the current conducted by the air outlet grille 400 is controlled while the reversing of the heat dissipation fan 500 is controlled, so that the control of the air conditioner outdoor unit matches the defrosting demand, thereby reducing the defrosting cost and improving the defrosting efficiency.

[0100] Optionally, the electrically conductive alloy material is a nickel alloy. In this way, the nickel alloy has a relatively thin processing thickness, relatively less self-heat loss, relatively high thermal conductivity and thermal diffusivity, and can efficiently convert electrical energy into heat 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 the nickel alloy can quickly recover to normal temperature, and the thermal efficiency is higher.

[0101] Optionally, the heat dissipation fan 500 is arranged at the windward side of the heat exchanger 320, and the air outlet grille 400 is located at the leeward side of the heat exchanger 320. In this way, the heat radiation of the heat dissipation fan 500 to the air outlet grille 400 can be avoided, and the interference of the heat of the air outlet grille 400 on the heat dissipation fan 500 can be reduced.

[0102] Optionally, the air conditioner outdoor unit further comprises an insulating support 330. The insulating support 330 is connected to the edge of the heat dissipation opening 310, and the air outlet grille 400 is arranged on the insulating support 330. In this way, the insulating support 330 can support the air outlet grille 400, and can also avoid the interference and waste caused by the current flowing to the shell 300.

[0103] Optionally, a plurality of honeycomb-shaped flow holes 410 are formed in the inner side of the air outlet grille 400. In this way, the contact area of the air outlet grille 400 with the air flow 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, and the heat exchanger 320 can be heated better.

[0104] Optionally, the heat dissipation fan 500 is a direct current fan. In this way, the air flow rate is not much different when the direct current fan is reversed, so that the air flow rate when the heat exchanger 320 is defrosted by reversing can be ensured.

[0105] The embodiment of the present disclosure provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute the control method for the air conditioner outdoor unit.

[0106] The computer readable storage medium described above can be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

[0107] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method disclosed in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, or can be a transitory storage medium.

[0108] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural, logical, electrical, process, and other changes. The embodiments represent only a few of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included in or replace parts and features of other embodiments. Also, the words used in this application are used only to describe the embodiments and not to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations of one or more associated listed items. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" refer to the presence of stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, or device including the element. In this document, each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the method, product, etc. disclosed in the embodiments, if it corresponds to the method part disclosed in the embodiments, the relevant part can be referred to the description of the method part.

[0109] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present disclosure. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0110] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of 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 the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0111] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A control method for an outdoor unit of an air conditioner, characterized in that, The air conditioner outdoor unit comprises: a casing, an air outlet grille and a cooling fan; a side wall of the casing is provided with a cooling port, an inner part of the casing is provided with a heat exchanger, and the air outlet grille is arranged in the cooling port; wherein the air outlet grille is made of conductive alloy material; the cooling fan is arranged in the inner part of the casing, and an air outlet end of the cooling fan is arranged towards the cooling port; the method comprises: obtaining a defrosting instruction of the air conditioner outdoor unit; controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, or controlling the air outlet grille to conduct current and controlling the cooling fan to reverse at the same time according to the defrosting instruction of the air conditioner outdoor unit; controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, comprising: determining a frosting area of the heat exchanger coil of the air conditioner outdoor unit; controlling the air outlet grille to conduct current in the area corresponding to the frosting area according to the defrosting instruction of the air conditioner outdoor unit; determining the frosting area of the heat exchanger coil of the air conditioner outdoor unit, comprising: obtaining a plurality of coil temperatures of a plurality of areas of the heat exchanger coil, wherein each area corresponds to a coil temperature; determining the lowest coil temperature in the plurality of coil temperatures as a target coil temperature, and determining the area corresponding to the target coil temperature as the frosting area; after controlling the air outlet grille to conduct current in the area corresponding to the frosting area according to the defrosting instruction of the air conditioner outdoor unit, further comprising: determining whether there is a defrosting area in the remaining areas of the heat exchanger coil; in the case that there is a defrosting area in the plurality of areas of the heat exchanger coil and the cooling fan reverses, controlling the rotation speed of the cooling fan to increase; determining whether there is a defrosting area in the remaining areas of the heat exchanger coil, comprising: determining the temperature difference between the coil temperature of the remaining areas of the heat exchanger coil and the target coil temperature; in the case that the temperature difference is less than or equal to a set temperature difference, the processor determines that the area is a defrosting area.

2. The method of claim 1, wherein, controlling the air outlet grille to conduct current according to the defrosting instruction of the air conditioner outdoor unit, or controlling the air outlet grille to conduct current and controlling the cooling fan to reverse at the same time according to the defrosting instruction of the air conditioner outdoor unit, comprising: in the case that the defrosting instruction is a first-level defrosting instruction, controlling the air outlet grille to conduct current; in the case that the defrosting instruction is a second-level defrosting instruction, controlling the air outlet grille to conduct current and controlling the cooling fan to reverse at the same time.

3. The method of claim 2, wherein, in the case that the defrosting instruction is a second-level defrosting instruction, after controlling the air outlet grille to conduct current and controlling the cooling fan to reverse at the same time, further comprising: obtaining the coil temperature of the heat exchanger of the air conditioner outdoor unit; controlling the size of the current conducted by the air outlet grille and the high and low of the rotation speed of the cooling fan according to the temperature interval in which the coil temperature is located.

4. The method of claim 3, wherein, controlling the size of the current conducted by the air outlet grille and the high and low of the rotation speed of the cooling fan according to the temperature interval in which the coil temperature is located, comprising: in the case that the coil temperature is in a first temperature interval, controlling the current conducted by the air outlet grille to increase and the rotation speed of the cooling fan to increase; in the case that the coil temperature is in a second temperature interval, controlling the current conducted by the air outlet grille to decrease and the rotation speed of the cooling fan to decrease; wherein the maximum value in the first temperature interval is less than the minimum value in the second temperature interval.

5. The method according to any one of claims 1 to 4, characterized in that, obtaining the defrosting instruction of the air conditioner outdoor unit, comprising: obtaining the coil temperature of the heat exchanger coil of the air conditioner outdoor unit and the indoor environment temperature; determining the temperature difference between the coil temperature and the indoor environment temperature; In a case where the temperature difference is greater than or equal to a set threshold, obtain a defrosting instruction of the air conditioner outdoor unit.

6. The method of claim 5, wherein, In a case where the temperature difference is greater than or equal to a set threshold, obtain a defrosting instruction of the air conditioner outdoor unit, including: In a case where the temperature difference is greater than or equal to a set threshold, obtain a defrosting instruction of the air conditioner outdoor unit. In a case where the temperature difference is greater than or equal to a set threshold, obtain a defrosting instruction of the air conditioner outdoor unit.

7. A control device for an air conditioner outdoor unit, comprising a processor and a memory having stored program instructions, characterized in that, The processor is configured to execute the control method for the air conditioner outdoor unit as claimed in any one of claims 1 to 6 when running the program instructions.

8. An air conditioner outdoor unit characterized by comprising: Including: A shell (300) is provided with a heat dissipation opening (310) in the side wall, and a heat exchanger (320) is arranged inside; An air outlet grille (400) is arranged in the heat dissipation opening (310), wherein the air outlet grille (400) is made of a conductive alloy material; A heat dissipation fan (500) is arranged inside the shell (300), and the air outlet end of the heat dissipation fan (500) is arranged towards the heat dissipation opening (310); The control device (200) for the air conditioner outdoor unit as claimed in claim 7 is mounted on the shell (300).

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