CN107631379B - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN107631379B CN107631379B CN201710993757.9A CN201710993757A CN107631379B CN 107631379 B CN107631379 B CN 107631379B CN 201710993757 A CN201710993757 A CN 201710993757A CN 107631379 B CN107631379 B CN 107631379B
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Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps of heating the air conditioner, controlling a first air deflector to rotate to a fully open state and a second air deflector to rotate to the fully open state, and controlling the first air deflector to rotate to an initial angle α when the air conditioner is switched to a defrosting mode0So as to reduce the air intake of the air inlet, control the second air deflector to rotate to the state of closing the air outlet, and after the first preset time a, control the second air deflector to rotate by the preset angle β0According to the control method of the air conditioner, when the air conditioner starts to enter the defrosting mode, the downward rotating angle α of the first air deflector is controlled0And the second air deflector is controlled to rotate upwards to a state of closing the air outlet, so that the air convection between the air inlet and the air outlet can be reduced, and the flow of cold air entering the outdoor unit can be reduced, thereby reducing the influence of outdoor cold air on the defrosting work of the air conditioner and improving the defrosting efficiency of the air conditioner. The control method of the air conditioner is simple to operate and high in practicability.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a control method of an air conditioner.
Background
When the air conditioner needs to perform heating operation in a snowy climate or a low temperature environment, a snow guard is generally installed on the air conditioner. The snow-proof device can effectively reduce the accumulation of ice and snow near the air conditioner during working, and ensure the normal air inlet of the outdoor heat exchanger, thereby ensuring the normal operation of the air conditioner. However, when the air conditioner performs heating defrosting, outdoor cold air can enter the outdoor unit through the air inlet on the snow-proof cover, and the cold air can exchange heat with the outdoor heat exchanger, so that the pressure of a refrigerant in the air conditioner is reduced, and the defrosting efficiency of the air conditioner is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method of an air conditioner, which has the advantages of simple operation and capability of improving the defrosting efficiency of the air conditioner.
According to the control method of the air conditioner, the air conditioner comprises an outdoor unit, the outdoor unit comprises a shell, a compressor, an outdoor heat exchanger and a four-way valve, the compressor, the outdoor heat exchanger and the four-way valve are arranged in the shell respectively, an air inlet through hole and an air outlet through hole are formed in the shell, a first snow-proof cover is covered outside the air inlet through hole, an air inlet is formed in the first snow-proof cover, a first air deflector used for opening or closing the air inlet is arranged at the air inlet, a second snow-proof cover is covered outside the air outlet through hole, an air outlet is formed in the second snow-proof cover, and a second air deflector used for opening or closing the air outlet is arranged at the air outlet0So as to reduce the air inlet volume of the air inlet, control the second air deflector to rotate to a state of closing the air outlet, and control the second air deflector to rotate by a preset angle β after a first preset time a0。
According to the control method of the air conditioner, when the air conditioner starts to enter the defrosting mode, the first air deflector is controlled to rotate downwards by an angle α0The second air deflector is controlled to rotate upwards to a state of closing the air outlet, so that air convection between the air inlet and the air outlet can be reduced, the flow rate of cold air entering the outdoor unit can be reduced, and the influence of the outdoor cold air on defrosting work of the air conditioner can be reduced, and the air conditioner can be improvedThe defrosting efficiency of the air conditioner is improved. The control method of the air conditioner is simple to operate and high in practicability.
According to some embodiments of the present invention, the refrigerant pressure Pc at the discharge port of the compressor is detected, and the control method further includes controlling the first air guiding plate to rotate to an initial angle α in the defrosting mode0Then, when the running frequency of the compressor reaches the specified defrosting frequency, the refrigerant pressure Pc is compared with a set pressure value PT, and when the refrigerant pressure Pc is less than a first set pressure value PT1, the first air deflector is controlled to rotate, so that the rotating angle α of the first air deflector is α0And + x, if not, controlling the first air deflector to maintain the current initial angle.
In some embodiments of the present invention, when the refrigerant pressure Pc is less than the first set pressure value PT1 and continues for the second predetermined time b, the first air deflector is controlled to rotate such that the rotation angle α of the first air deflector is α0+x。
According to some embodiments of the present invention, a refrigerant pressure Pc at an exhaust port of a compressor is detected, and a module temperature T of a control unit of the outdoor unit is detected, and the control method further includes: in the defrosting mode, when the refrigerant pressure Pc is greater than a second set pressure value PT2 or the module temperature T is greater than a set temperature value D, the first air deflector is controlled to rotate to a fully open state and the second air deflector is controlled to rotate to a fully open state.
According to some embodiments of the present invention, when the first air guiding plate rotates to the fully open state, the air inlet end of the first air guiding plate is located below the air outlet end of the first air guiding plate.
According to some embodiments of the invention, the second air deflection plate is horizontally disposed when the second air deflection plate is rotated to the fully open position.
According to some embodiments of the invention, the first air guiding plate is a plurality of plates, and the plurality of plates are driven by the same motor to rotate.
According to some embodiments of the invention, the second air guiding plate is a plurality of plates, and the plurality of plates are driven by the same motor to rotate.
According to some embodiments of the invention, the left and right side walls of the casing are respectively provided with the air inlet through holes, and the first snow-proof cover is covered outside each air inlet through hole.
According to some embodiments of the invention, the top of the casing is provided with the air outlet through hole, and the second snow protection cover is arranged at the top of the casing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view illustrating an overall structure of an outdoor unit according to an embodiment of the present invention;
fig. 2 is a side view of an outdoor unit according to an embodiment of the present invention;
fig. 3 is a schematic view of a structure of the first air guiding plate and the first driving motor according to an embodiment of the present invention, wherein the first air guiding plate is in an initial state;
fig. 4 is a schematic view of a structure of the first air guiding plate and the first driving motor according to an embodiment of the present invention, wherein a rotation angle of the first air guiding plate is α;
fig. 5 is a schematic view of a structure of the second air guiding plate and the second driving motor according to the embodiment of the invention, wherein the second air guiding plate is in an initial state;
fig. 6 is a schematic view of a structure of the second wind deflector cooperating with the second driving motor according to an embodiment of the present invention, wherein a rotation angle of the second wind deflector is β.
Reference numerals:
the outdoor unit 100 is provided with a refrigerant circuit,
the housing 10 is provided with a plurality of through holes,
a first snow-proof cover 110, a first inclined slope 110A, a second inclined slope 110B, a third inclined slope 110C, a second snow-proof cover 120, an air inlet 130, an air outlet 140,
a first air deflector 20, a connecting end 210, a rotating end 220,
a first drive motor (30) is provided,
the second air deflection plate 40, the first end 410, the second end 420,
a second drive motor 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A control method of an air conditioner including an outdoor unit 100 according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
The outdoor unit 100 includes a casing 10, a compressor, an outdoor heat exchanger, and a four-way valve, which are respectively provided in the casing 10. The compressor can compress the refrigerant, and the compressed refrigerant can enter the outdoor heat exchanger, so that heat exchange with outdoor air can be completed. The four-way valve can adjust the working modes of an indoor heat exchanger and an outdoor heat exchanger of the air conditioner. When the air conditioner performs refrigeration, the indoor heat exchanger is an evaporator, and the outdoor heat exchanger is a condenser. When the air conditioner performs heating work, the four-way valve can change the working modes of the indoor heat exchanger and the outdoor heat exchanger through reversing, the indoor heat exchanger is a condenser, and the outdoor heat exchanger is an evaporator.
As shown in fig. 1 to 2, the casing 10 is provided with an inlet vent and an outlet vent, and the inlet vent is covered by a first snow cover 110, and the first snow cover 110 can prevent the inlet vent from being blocked due to frost and snow accumulation, thereby ensuring that the outdoor unit 100 can normally supply air. The first snow guard cover 110 may extend in a longitudinal direction of the outdoor unit 100. As shown in fig. 1, the first snow-proof cover 110 is provided with an air inlet 130, wherein the air inlet 130 may be provided at a lower portion of the first snow-proof cover 110. A first air guide plate 20 for opening and closing the air inlet 130 is provided at the air inlet. For example, as shown in fig. 3-4, when the first air deflection plate 20 closes the air inlet 130, the first air deflection plate 20 rotates downward. When the first air deflector 20 opens the air inlet 130, the first air deflector 20 rotates upward.
As shown in fig. 1 to 2, the second snow guard cover 120 is covered at the outlet hole, the second snow guard cover 120 controls the amount of air passing through the outdoor unit 100, and the second snow guard cover 120 may extend in the width direction of the outdoor unit 100. As shown in fig. 2, the second snow-proof cover 120 is provided with an outlet 140, wherein the outlet 140 may be provided on a right side wall of the second snow-proof cover 120. The air outlet 140 is provided with a second air deflector 40 for opening or closing the same. For example, as shown in fig. 5 to 6, when the second air deflection plate 40 closes the outlet opening 140, the second air deflection plate 40 rotates upward. When the second air deflector 40 opens the outlet 140, the second air deflector 40 rotates downward.
The control method of the air conditioner according to the embodiment of the invention comprises the following steps:
when the air conditioner performs heating operation, the first air deflector 20 is controlled to rotate to the fully open state and the second air deflector 40 is controlled to rotate to the fully open state, and outdoor air flow can enter the outdoor unit 100 through the air inlet 130 and can be discharged from the air outlet 140, so that normal convection between the outdoor unit 100 and the outdoor air can be realized. It is understood that the rotation of the first air guiding plate 20 to the fully open state described in the present invention refers to the fully open state of the intake vent 130, and the ventilation volume of the intake vent 130 is the maximum. The rotation of the second air guiding plate 40 to the fully open state described in the present invention means that the outlet 140 is in the fully open state, and the ventilation volume of the outlet 140 is the maximum.
When the outdoor temperature is low, the outdoor unit 100 is frosted, the temperature sensing bulb disposed on the surface of the outdoor heat exchanger can detect the surface temperature of the outdoor heat exchanger and transmit the temperature signal to the four-way valve, the four-way valve receives the signal and then switches the direction, the air conditioner switches to the defrosting mode, and the first air deflector 20 is controlled to rotate downward to the initial angle α0The second air deflector 40 is controlled to rotate upwards to a state of closing the air outlet 140 so as to reduce the air intake of the air inlet 130, at the moment, the outdoor heat exchanger is a condenser, a high-temperature refrigerant can enter the outdoor heat exchanger to melt frost and snow in the outdoor unit 100, and the air outlet 140 is in a fully closed state, so that the influence of external air flow on heat exchange between the refrigerant and a frost layer can be reduced in the defrosting process, the high pressure of the refrigerant can be improved, the heat exchange temperature difference between the refrigerant and the frost layer can be increased, the defrosting efficiency of the air conditioner can be further improved, and after the air outlet 140 is continuously closed for a first preset time a, the second air deflector 40 is controlled to rotate downwards to a preset angle β0Accordingly, convection between the air inlet 130 and the air outlet 140 can be achieved, and moisture generated by defrosting can be discharged out of the outdoor unit 100. It should be noted that, in the defrosting mode, the outdoor fan generally stops rotating, so that the defrosting efficiency of the air conditioner can be further improved.
It should be noted that the first air guiding plate 20 rotates downwards by the initial angle α when the air conditioner starts to enter the defrosting mode0A first preset time a for continuously closing the air outlet 140 during the defrosting process, and an angle β for the second air guiding plate 40 to rotate downward after the defrosting mode is finished0For example, when the outdoor temperature is extremely low, the downward rotating angle α of the first air guiding plate 20 may be increased0Therefore, the air inlet area of the air inlet 130 can be reduced, and the influence of outdoor cold air on defrosting operation of the air conditioner can be reduced. In addition, the first preset time a for continuously closing the air outlet 140 can be prolonged, so that the heat exchange time between frost and snow and the heat of the refrigerant can be prolonged, and the utilization rate of the temperature of the refrigerant can be improved.
According to the control method of the air conditioner of the embodiment of the invention, when the air conditioner starts to enter the defrosting mode, the first air deflector 20 is controlled to rotate downwards by the angle α0The second air deflector 40 is controlled to rotate upwards to a state of closing the air outlet 140, so that air convection between the air inlet 130 and the air outlet 140 can be reduced, and the flow rate of cold air entering the outdoor unit 100 can be reduced, thereby reducing the influence of the outdoor cold air on the defrosting operation of the air conditioner and improving the defrosting efficiency of the air conditioner. The control method of the air conditioner is simple to operate and high in practicability.
According to some embodiments of the invention, the control method further comprises the steps of:
in the defrosting mode, the first air deflector 20 is controlled to rotate to the initial angle α0When the refrigerant pressure Pc is less than the first set pressure PT1, the first air deflector 20 is controlled to continue to rotate downward such that the rotation angle α of the first air deflector 20 is α0+ x, thereby reducing the air intake area of the air intake 130, reducing the flow of the cold air blown into the outdoor unit 100, reducing the heat exchange between the refrigerant and the cold air, and thus increasing the utilization of the heat of the refrigerant, and enabling the cooling in the air conditionerThe medium keeps sufficient circulation pressure, promotes the defrosting efficiency of air conditioner.
If the refrigerant pressure Pc is greater than or equal to the first set pressure value PT1, which indicates that the refrigerant flow in the air conditioner can meet the normal working requirement, the first air deflector 20 is controlled to maintain the current initial angle, and the normal convection between the air inlet 130 and the air outlet 140 is maintained. It should be noted that, the angle x of the downward rotation of the first air deflector 20 and the magnitude of the first set pressure value PT1 may be selected according to actual requirements, and the present invention is not limited in this regard. For example, when the pressure difference between the refrigerant pressure Pc and the set pressure value PT is large, the downward rotation angle x of the first air guiding plate 20 can be increased appropriately, so that the flow rate of the cool air entering the outdoor unit 100 can be further reduced. Alternatively, the first set pressure value PT1 may be 1.2 MPa.
According to some embodiments of the present invention, when the refrigerant pressure Pc < the first set pressure value PT1 and continues for the second predetermined time b, the first air guiding plate 20 is controlled to rotate downward such that the rotation angle α of the first air guiding plate 20 is α0+ x, thereby reducing the air intake area of the air intake 130 and reducing the flow of the cold air blown into the outdoor unit 100, so as to improve the utilization rate of the heat of the refrigerant, improve the defrosting efficiency of the air conditioner, and simultaneously avoid the phenomenon of controlling the first air deflector 20 to rotate by mistake due to the detection fault, thereby improving the reliability. Alternatively, the second predetermined time b may be 20 seconds.
According to some embodiments of the invention, the control method further comprises the steps of:
after the operating frequency of the compressor reaches a designated defrosting frequency, a refrigerant pressure Pc at an exhaust port of the compressor and a module temperature T of a control unit of the outdoor unit 100 are detected. When the refrigerant pressure Pc is greater than the second set pressure value PT2 and/or the module temperature T is greater than the set temperature value D, the fan needs to perform heat dissipation intensively at this time, the first air deflector 20 can be controlled to rotate to the fully open state and the second air deflector 40 can be controlled to rotate to the fully open state, so that the air circulation area at the air inlet 130 and the air outlet 140 can be increased, the air convection between the air inlet 130 and the air outlet 140 can be enhanced, the heat exchange between the control unit and the outdoor air can be accelerated, the module temperature of the control unit of the outdoor unit 100 can be reduced, and the normal operation of the control unit can be ensured.
It should be noted that the second set pressure value PT2 and the set temperature value D can be selectively set according to the actual characteristics of the control unit, wherein the second set pressure value PT2 is greater than the first set pressure value PT1, and the set temperature value D should be less than the maximum working temperature that the control unit can bear. Alternatively, the second set pressure value PT2 may be 2.8MPa and the set temperature value D may be 70 ℃.
As shown in fig. 3, according to some embodiments of the present invention, when the first air guiding plate 20 rotates to the fully open state, the air inlet end of the first air guiding plate 20 is located below the air outlet end of the first air guiding plate 20, so that the air inlet area of the air inlet 130 can be increased. Specifically, as shown in fig. 3, the air inlet end of the first air guiding plate 20 is disposed near the air inlet 130, and the air outlet end of the first air guiding plate 20 is disposed far from the air inlet 130. When the first air guiding plate 20 is in the fully opened state, the first air guiding plate 20 is disposed in an inclined manner, the inclined direction of the first air guiding plate can be perpendicular to the inclined direction of the first snow guard 110, and the air inlet end is located obliquely below the air outlet end, so that the air inlet area of the air inlet 130 can be increased, and the air convection between the outdoor unit 100 and the outside can be improved.
As shown in fig. 5, according to some embodiments of the present invention, when the second air deflectors 40 rotate to the fully open state, the second air deflectors 40 are horizontally disposed, so that a distance between two adjacent second air deflectors 40 can be increased, and an air outlet area of the air outlet 140 can be increased. As shown in fig. 2, it can be understood that the right side wall of the second snow guard 120 is vertically disposed, the second air guiding plate 40 is horizontally disposed in the fully open state, and the second air guiding plate 40 is perpendicular to the plane where the air inlet 130 is located, so that the air outlet area of the air outlet 140 can be increased to the maximum, the resistance of the second air guiding plate 40 to the air flow can be reduced, and the smooth air outlet of the outdoor unit 100 can be ensured.
As shown in fig. 3 to 4, according to some embodiments of the present invention, there are a plurality of first wind deflectors 20, and the plurality of first wind deflectors 20 are driven by the same motor to rotate, so that the matching structure of the plurality of first wind deflectors 20 is more compact and is convenient to control. Specifically, as shown in fig. 3, the first driving motor 30 is disposed at the lower end of the air inlet 130, and each first air guiding plate 20 includes a connecting end 210 and a rotating end 220, wherein the connecting end 210 of each first air guiding plate 20 faces a direction close to the air inlet 130. The first driving motor 30 is connected to the connection end 210 of each first air deflection plate 20. When the air inlet 130 needs to be closed, the first driving motor 30 may drive the connecting end 210 of each first air guiding plate 20 to move downward, and each first air guiding plate 20 may rotate downward around the rotating end 220 thereof, so that the air inlet 130 may be closed. When the air inlet 130 needs to be opened, the first driving motor 30 may drive the connecting end 210 of each first air guiding plate 20 to move upward, and each first air guiding plate 20 may rotate upward around the rotating end 220 thereof, so that the air outlet 140 may be opened. Alternatively, the first driving motor 30 may be a stepping motor, and the first driving motor 30 may realize precise control of the inclination angle of the first air deflector 20 by adjusting the rotation number of itself.
As shown in fig. 5 to 6, according to some embodiments of the present invention, there are a plurality of second wind deflectors 40, and the plurality of second wind deflectors 40 are driven by the same motor to rotate, so that the matching structure of the plurality of second wind deflectors 40 is more compact and is convenient to control. Specifically, as shown in fig. 5, the second driving motor 50 is disposed at the upper end of the air outlet 140, and each second air deflector 40 includes a first end 410 and a second end 420, wherein the second end 420 of each second air deflector 40 faces a direction close to the air outlet 140. A second drive motor 50 is coupled to the second end 420 of each second air deflection plate 40. When it is required to close the air outlet 140, the second driving motor 50 may drive the second end 420 of each second air guiding plate 40 to move upward, and each second air guiding plate 40 may rotate upward around the first end 410 thereof, so that the air outlet 140 may be closed. When it is required to open the air outlet 140, the second driving motor 50 may drive the second end 420 of each second air deflector 40 to move downward, and each second air deflector 40 may rotate downward around the first end 410 thereof, so that the air outlet 140 may be opened. Alternatively, the second driving motor 50 may be a stepping motor, and the second driving motor 50 may realize the precise control of the inclination angle of the second air guiding plate 40 by adjusting the rotation number thereof.
As shown in fig. 1-2, according to some embodiments of the present invention, air inlet through holes are respectively formed on left and right sidewalls of the casing 10, and a first snow cover 110 is covered at each air inlet through hole, and the first snow cover 110 can effectively reduce ice and snow accumulation near the air conditioner, thereby ensuring normal air inlet of the outdoor heat exchanger. For example, as shown in fig. 1, the first snow-proof cover 110 is provided with a first inclined slope 110A, a second inclined slope 110B and a third inclined slope 110C, wherein the first inclined slope 110A is located at an upper end of the first snow-proof cover 110 and is connected to the housing 10, the third inclined slope 110C is located at a lower end of the first snow-proof cover 110 and is connected to the housing 10, and the second inclined slope 110B is located between the first inclined slope 110A and the third inclined slope 110C. Wherein the first inclined slope 110A and the second inclined slope 110B both extend in the up-down direction toward a direction away from the casing 10, wherein the inclination angle of the first inclined slope 110A is greater than the inclination angle of the second inclined slope 110B. The third inclined slope 110C extends in the up-down direction toward a direction close to the cabinet 10. When frost and snow fall on the first snow prevention cover 110, the frost and snow may slide down the first inclined surface 110A and the second inclined surface 110B under the action of gravity or wind, so that the influence of the frost and snow on the outdoor unit 100 may be reduced, and the phenomenon of freezing of the outdoor heat exchanger due to the accumulation of the frost and snow may be prevented. It should be noted that the overall structure of the first snow-proof cover 110 is not limited thereto, and the present invention is not particularly limited thereto.
As shown in fig. 2, according to some embodiments of the present invention, the top of the cabinet 10 is provided with an air outlet hole, the second snow-proof cover 120 is provided at the top of the cabinet 10, and an upper side of the second snow-proof cover 120 may be inclined and extended in an up-down direction toward a direction approaching the first snow-proof cover 110. The second snow prevention cover 120 is located at the upper end of the first snow prevention cover 110, and when frost and snow fall down to the second snow prevention cover 120, the frost and snow may slide down onto the first snow prevention cover 110 along the upper side of the second snow prevention cover 120 under the action of gravity or wind, and may continuously slide down along the first snow prevention cover 110, thereby reducing the temperature influence of the frost and snow on the outdoor unit 100.
A method for controlling an air conditioner including an outdoor unit 100 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 6. It is to be understood that the following description is only exemplary, and not restrictive of the invention.
The outdoor unit 100 includes a casing 10, a compressor, an outdoor heat exchanger, and a four-way valve, which are respectively provided in the casing 10. The casing 10 is provided with an air inlet through hole and an air outlet through hole, a first snow-proof cover 110 is covered outside the air inlet through hole, an air inlet 130 is arranged on the first snow-proof cover 110, and the air inlet 130 is arranged at the lower part of the first snow-proof cover 110. A first air guide plate 20 for opening and closing the air inlet 130 is provided at the air inlet. The second snow-proof cover 120 is covered outside the air outlet through hole, an air outlet 140 is arranged on the second snow-proof cover 120, wherein the air outlet 140 is arranged on the right side wall of the second snow-proof cover 120, and a second air deflector 40 for opening or closing the air outlet 140 is arranged at the position of the air outlet 140.
As shown in fig. 1, the first snow-proof cover 110 is provided with a first inclined slope 110A, a second inclined slope 110B and a third inclined slope 110C, wherein the first inclined slope 110A is located at an upper end of the first snow-proof cover 110 and is connected to the cabinet 10, the third inclined slope 110C is located at a lower end of the first snow-proof cover 110 and is connected to the cabinet 10, and the second inclined slope 110B is located between the first inclined slope 110A and the third inclined slope 110C. The first inclined surface 110A and the second inclined surface 110B extend in a direction away from the outdoor unit 100 in the vertical direction, and an inclination angle of the first inclined surface 110A is greater than an inclination angle of the second inclined surface 110B. The third inclined slope 110C extends in the up-down direction toward the outdoor unit 100.
As shown in fig. 2, the second snow guard 120 is provided on the top of the housing 10, and the upper side of the second snow guard 120 extends obliquely in the vertical direction toward the first snow guard 110. The second snow prevention cover 120 is located at the upper end of the first snow prevention cover 110, and when frost and snow fall down to the second snow prevention cover 120, the frost and snow may slide down onto the first snow prevention cover 110 along the upper side of the second snow prevention cover 120 under the action of gravity or wind, and may continuously slide down along the first snow prevention cover 110, thereby reducing the temperature influence of the frost and snow on the outdoor unit 100.
As shown in fig. 3 to 4, the number of the first air guiding plates 20 is multiple, and each first air guiding plate 20 includes a connection end 210 and a rotation end 220, wherein the connection end 210 of each first air guiding plate 20 is disposed toward a direction close to the air inlet 130. The lower end of the air inlet 130 is provided with a first driving motor 30, wherein the first driving motor 30 is a step motor, and the first driving motor 30 is connected to the connecting end 210 of each first air deflector 20. As shown in fig. 5 to 6, there are a plurality of second air deflectors 40, each of the second air deflectors 40 includes a first end 410 and a second end 420, and the second end 420 of each of the second air deflectors 40 faces a direction close to the outlet 140. The lower end of the air outlet 140 is provided with a second driving motor 50, the first driving motor 30 is a step motor, and the second driving motor 50 is connected to the second end 420 of each second air guiding plate 40.
Specifically, when the outdoor temperature is low, the outdoor unit 100 is frozen or frosted, the temperature sensing bulb arranged on the surface of the outdoor heat exchanger can detect the surface temperature of the outdoor heat exchanger and transmit a temperature signal to the four-way valve, the four-way valve performs reversing after receiving the temperature signal, the air conditioner switches to the defrosting mode, the outdoor fan stops rotating, and the first driving motor 30 controls the plurality of first air deflectors 20 to rotate downwards to the inclination angle α0In order to reduce the intake volume of the air inlet 130, the second driving motor 50 controls the plurality of second air deflectors 40 to rotate upward to close the air outlet 140, at this time, the outdoor heat exchanger is a condenser, a high-temperature refrigerant can enter the outdoor heat exchanger, and can exchange heat with frost and snow in the outdoor unit 100 to melt the frost and snow, and after the air inlet 130 is continuously closed for 2 minutes, the second driving motor 50 controls the plurality of second air deflectors 40 to rotate downward to a preset angle β0The air outlet 140 is opened, so that convection between the air inlet 130 and the air outlet 140 can be achieved, and moisture generated by defrosting can be discharged out of the outdoor unit 100. Then the four-way valve is reversed, and the air conditioner continues to perform normal heating work.
When the air conditioner is operated, after the operating frequency of the compressor reaches the specified defrosting frequency, the refrigerant pressure Pc of the exhaust port of the compressor and the module temperature T of the control unit are detected. When the pressure of refrigerant Pc is less than 1.2MPa and is continuousAfter 20 seconds, the first driving motor 30 controls the plurality of first air deflectors 20 to rotate downwards, so that the rotation angle of each first air deflector 20 is α - α0+ x, the flow rate of the cold air blown into the outdoor unit 100 can be reduced, thereby increasing the utilization rate of the heat of the refrigerant and improving the defrosting efficiency of the air conditioner. When the refrigerant pressure Pc is more than 2.8MPa or the module temperature T is more than 70 ℃. In the meantime, the fan needs to perform enhanced heat dissipation, the first driving motor 30 drives the first air guiding plate 20 to rotate to the fully open state, and the second driving motor 50 drives the second air guiding plate 40 to rotate to the fully open state, so that air convection between the air inlet 130 and the air outlet 140 can be increased, heat exchange between the control unit and the outside air is accelerated, the module temperature of the control unit of the outdoor unit 100 can be reduced, and the normal operation of the control unit is ensured.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The control method of the air conditioner is characterized in that the air conditioner comprises an outdoor unit, the outdoor unit comprises a casing, a compressor, an outdoor heat exchanger and a four-way valve, the compressor, the outdoor heat exchanger and the four-way valve are respectively arranged in the casing, an air inlet through hole and an air outlet through hole are formed in the casing, a first snow-proof cover is covered outside the air inlet through hole, an air inlet is formed in the first snow-proof cover, a first air deflector used for opening or closing the air inlet is arranged at the air inlet, a second snow-proof cover is covered outside the air outlet through hole, an air outlet is formed in the second snow-proof cover, and a second air deflector used for opening or closing the air outlet is arranged at the air outlet, and the control method comprises the following steps:
the air conditioner is in heating operation, and the first air deflector is controlled to rotate to a fully open state and the second air deflector is controlled to rotate to a fully open state;
when the air conditioner is controlled to be switched to the defrosting mode, the first air deflector is controlled to rotate to an initial angle α0So as to reduce the air inlet volume of the air inlet, control the second air deflector to rotate to a state of closing the air outlet, and control the second air deflector to rotate by a preset angle β after a first preset time a0。
2. The method of claim 1, wherein a refrigerant pressure Pc at a discharge port of the compressor is detected, the method further comprising:
in the defrosting mode, the first air deflector is controlled to rotate to an initial angle α0Then, when the running frequency of the compressor reaches the specified defrosting frequency, comparing the refrigerant pressure Pc with a set pressure value PT;
when the refrigerant pressure Pc is less than a first set pressure value PT1, the first air deflector is controlled to rotate so that the rotation angle α of the first air deflector is α0And + x, if not, controlling the first air deflector to maintain the current initial angle.
3. The method as claimed in claim 2, wherein when the refrigerant pressure Pc < the first set pressure PT1 and continues for a second predetermined time b, the first air deflector is controlled to rotate such that the rotation angle α of the first air deflector is α0+x。
4. The method of claim 1, wherein a refrigerant pressure Pc at a discharge port of a compressor is detected, and a module temperature T of a control unit of the outdoor unit is detected, the method further comprising:
in the defrosting mode, when the refrigerant pressure Pc is greater than a second set pressure value PT2 or the module temperature T is greater than a set temperature value D, the first air deflector is controlled to rotate to a fully open state and the second air deflector is controlled to rotate to a fully open state.
5. The method of claim 1, wherein when the first air deflector is rotated to a fully open position, the air inlet end of the first air deflector is located below the air outlet end of the first air deflector.
6. The method of claim 1, wherein the second air deflector is horizontally disposed when the second air deflector is rotated to a fully open state.
7. The method as claimed in claim 1, wherein the first air guiding plate is provided in plurality, and the plurality of first air guiding plates are driven by a same motor to rotate.
8. The method as claimed in claim 1, wherein the number of the second wind deflectors is plural, and the plural second wind deflectors are rotated by the same motor.
9. The control method of an air conditioner according to claim 1, wherein said air intake through holes are formed in left and right side walls of said cabinet, respectively, and said first snow guard is covered at each of said air intake through holes.
10. The control method of an air conditioner according to any one of claims 1 to 9, wherein the outlet vent hole is provided at a top of the cabinet, and the second snow shield is provided at the top of the cabinet.
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| CN201710993757.9A CN107631379B (en) | 2017-10-23 | 2017-10-23 | Control method of air conditioner |
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| CN201710993757.9A CN107631379B (en) | 2017-10-23 | 2017-10-23 | Control method of air conditioner |
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| CN107631379B true CN107631379B (en) | 2020-09-04 |
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| CN110887169A (en) * | 2019-10-16 | 2020-03-17 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and device and air conditioner |
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| CN102518595A (en) * | 2011-12-13 | 2012-06-27 | Tcl空调器(中山)有限公司 | Method for controlling rotating speed of outer fan of multi-split air conditioner |
| JP2017083147A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Outdoor unit of air conditioner |
| CN205641433U (en) * | 2016-04-29 | 2016-10-12 | 广东美的制冷设备有限公司 | Air conditioner shell and window air conditioner |
| CN106369750A (en) * | 2016-09-08 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and defrosting control device of air conditioner and air conditioner |
| CN107238148A (en) * | 2017-07-20 | 2017-10-10 | 广东美的暖通设备有限公司 | Air-conditioner outdoor unit, air-conditioning and air-conditioner outdoor unit control method |
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