Air conditioner control method and air conditioner

Abstract

The invention relates to the technical field of air conditioner equipment, particularly provides a control method of an air conditioner and the air conditioner, and aims to solve the problem that the heat exchange efficiency and the stability are affected due to the fact that control over the suction superheat degree is not accurate enough in the running process of an existing air conditioner. In order to achieve the purpose, the air conditioner comprises a shell, the shell comprises dimming glass, the dimming glass is electrically connected with a power source, the light transmittance of the dimming glass in the power-off state is the lowest, and the light transmittance of the dimming glass in the power-on state is increased along with increase of voltage; the condenser is installed at the position, close to the dimming glass, in the shell, and sunlight can irradiate the condenser through the dimming glass; the control method comprises the steps that when it is judged that the air conditioner is executing a heating mode, the superheat degree of an outlet of a condenser is obtained; and selectively adjusting the light transmittance of the dimming glass according to the superheat degree. Through the arrangement, illumination can be reasonably utilized to carry out auxiliary adjustment on the superheat degree of the refrigerant, so that the superheat degree is controlled within a reasonable range.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and specifically provides a control method of an air conditioner and an air conditioner. Background Art

[0002] Suction superheat usually refers to the difference between the temperature of the refrigerant at the outlet of the evaporation side and the saturation temperature at the corresponding pressure. It is a key parameter in the air conditioning heat exchange system, reflecting the heat absorption and evaporation efficiency of the refrigerant on the evaporation side.

[0003] The suction superheat has a significant impact on the efficiency and stability of the heat exchange system. Appropriate suction superheat can ensure that the refrigerant is completely vaporized, so that it enters the compressor in a vapor state, avoiding the wet stroke and potential liquid hammer risk caused by liquid refrigerant entering the compressor. However, excessive superheat will increase the load of the compressor, increase power consumption and exhaust temperature, and may cause overload and overheating. Therefore, the superheat needs to be controlled within a reasonable range.

[0004] However, the existing air conditioners do not accurately control the suction superheat during operation, which affects the heat exchange efficiency and stability.

[0005] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0006] The present invention aims to solve the above technical problem, namely, the problem that the existing air conditioner does not accurately control the suction superheat during operation, which affects the heat exchange efficiency and stability.

[0007] In a first aspect, the present invention provides a control method for an air conditioner, wherein an external unit of the air conditioner comprises: a shell, wherein the shell comprises dimming glass, wherein the dimming glass is electrically connected to a power supply, wherein the transmittance of the dimming glass is lowest in a power-off state, and the transmittance in a power-on state increases with increasing voltage; a condenser, wherein the condenser is installed in the shell near the dimming glass and enables sunlight to pass through the dimming glass and irradiate the condenser; the control method comprises: when it is determined that the air conditioner is executing a heating mode, obtaining the superheat at the outlet of the condenser; and selectively adjusting the transmittance of the dimming glass according to the superheat.

[0008] In the preferred technical solution of the above control method, the step of "selectively adjusting the transmittance of the dimming glass according to the superheat" specifically includes: calculating the difference between the superheat and the target superheat; and selectively adjusting the transmittance of the dimming glass according to the difference.

[0009] In the preferred technical solution of the above control method, the step of "selectively adjusting the transmittance of the dimming glass according to the difference" specifically includes: comparing the difference with a preset difference; and selectively adjusting the transmittance of the dimming glass according to the comparison result.

[0010] In the preferred technical scheme of the above-mentioned control method, the step of "selectively adjusting the transmittance of the dimming glass according to the comparison result" specifically includes: if the difference is greater than the preset difference and the superheat is greater than the target superheat, reducing the transmittance of the dimming glass; and / or if the difference is greater than the preset difference and the superheat is less than the target superheat, increasing the transmittance of the dimming glass; and / or if the difference is not greater than the preset difference, not adjusting the transmittance of the dimming glass.

[0011] In the preferred technical scheme of the above-mentioned control method, the step of "obtaining the superheat at the outlet of the condenser" specifically includes: obtaining the outlet temperature of the condenser; obtaining the internal temperature of the condenser; calculating the difference between the outlet temperature and the internal temperature to obtain the superheat at the outlet of the condenser.

[0012] In the preferred technical solution of the above-mentioned control method, before executing the step of "obtaining the superheat at the outlet of the condenser", the control method of the present invention also includes: obtaining the outdoor light intensity; according to the light intensity, selectively obtaining the superheat at the outlet of the condenser or disconnecting the connection between the dimming glass and the power supply.

[0013] In the preferred technical solution of the above-mentioned control method, the step of "selectively obtaining the superheat at the outlet of the condenser or disconnecting the connection between the dimming glass and the power supply according to the light intensity" specifically includes: comparing the light intensity with a preset intensity; if the light intensity is not lower than the preset intensity, obtaining the superheat at the outlet of the condenser; and / or if the light intensity is lower than the preset intensity, disconnecting the connection between the dimming glass and the power supply.

[0014] In the preferred technical solution of the above control method, when it is determined that the air conditioner is executing a cooling mode, the control method of the present invention further includes: disconnecting the connection between the dimming glass and the power supply to minimize the light transmittance of the dimming glass.

[0015] In the preferred technical solution of the above-mentioned control method, the condenser includes a plurality of branch pipes, the shell includes a plurality of dimming glasses, the positions of the plurality of dimming glasses correspond one-to-one to the positions of the plurality of branch pipes, and the step of "obtaining the superheat at the outlet of the condenser" specifically includes: obtaining the superheat at the outlet of each branch pipe; the step of "selectively adjusting the transmittance of the dimming glass according to the superheat" specifically includes: selectively adjusting the transmittance of each dimming glass according to the superheat at the outlet of each branch pipe.

[0016] In a second aspect, the present invention provides an air conditioner, comprising a controller configured to execute the above control method.

[0017] In the case of adopting the above technical solution, the external unit of the air conditioner of the present invention comprises: a shell, the shell comprises a dimming glass, the dimming glass is electrically connected to the power supply, the transmittance of the dimming glass is the lowest in the power-off state, and the transmittance in the power-on state increases with the increase of the voltage; a condenser, the condenser is installed in the shell near the dimming glass, and the sunlight can be irradiated on the condenser through the dimming glass; the control method of the present invention comprises: when it is determined that the air conditioner is executing the heating mode, the superheat at the outlet of the condenser is obtained; according to the superheat, the transmittance of the dimming glass is selectively adjusted. Through such a setting, when the air conditioner executes the heating mode, the light irradiation intensity of the condenser can be controlled by adjusting the transmittance of the dimming glass to control the heat transfer to the condenser, so as to achieve the effect of auxiliary adjustment of the superheat of the refrigerant, so as to maintain the dynamic balance of the superheat, so that the superheat is always kept in a reasonable range, which is helpful to increase the heating amount, and can make the refrigerant fully evaporate, prevent the risk of droplets entering the compressor and causing wet stroke and liquid hammer, improve the stability of the air conditioner, and extend the service life.

[0018] Furthermore, the control method of the present invention further includes: calculating the difference between the superheat and the target superheat; and selectively adjusting the light transmittance of the dimming glass according to the difference. Through such a setting, the target superheat can be used to calibrate the target value of the superheat corresponding to the air conditioner under an ideal state, providing a reference for the control of the superheat.

[0019] Furthermore, the control method of the present invention further includes: comparing the difference with a preset difference; and selectively adjusting the light transmittance of the dimming glass according to the comparison result. Through such an arrangement, the preset difference can be used to calibrate a reasonable range of superheat, so that the superheat has a certain reasonable fluctuation space, so as to avoid too frequent control of the dimming glass.

[0020] Furthermore, the control method of the present invention further includes: if the difference is greater than the preset difference and the superheat is greater than the target superheat, then the light transmittance of the dimming glass is reduced; and / or if the difference is greater than the preset difference and the superheat is less than the target superheat, then the light transmittance of the dimming glass is increased; and / or if the difference is not greater than the preset difference, then the light transmittance of the dimming glass is not adjusted. Through such an arrangement, the actual superheat at the outlet of the condenser can always fluctuate within a reasonable range around the target superheat, so as to maintain a dynamic balance of the superheat and ensure a good operating state of the air conditioner.

[0021] Furthermore, the control method of the present invention also includes: obtaining the outlet temperature of the condenser; obtaining the internal temperature of the condenser; calculating the difference between the outlet temperature and the internal temperature to obtain the superheat at the outlet of the condenser. Through such a setting, on the one hand, by detecting the temperature inside the condenser, the saturation temperature of the refrigerant when evaporating can be measured, making the calculated superheat more accurate; on the other hand, the detection method is simple, reliable and easy to implement.

[0022] Furthermore, before executing the step of "obtaining the superheat at the outlet of the condenser", the control method of the present invention further includes: obtaining the outdoor light intensity; and selectively obtaining the superheat at the outlet of the condenser or disconnecting the connection between the dimming glass and the power supply according to the light intensity. Through such a setting, it is judged whether the outdoor light intensity can provide heat energy for the condenser, so as to decide whether it is necessary to continue to supply power to the dimming glass to adjust the transmittance, thereby improving the intelligence of the control.

[0023] Furthermore, the control method of the present invention also includes: comparing the light intensity with the preset intensity; if the light intensity is not lower than the preset intensity, obtaining the superheat at the outlet of the condenser; and / or if the light intensity is lower than the preset intensity, disconnecting the connection between the dimming glass and the power supply. Through such a setting, the air conditioner will only supply power to the dimming glass to adjust the transmittance when the light is strong enough to provide heat energy to the condenser, and when the light is weak and cannot provide heat to the condenser, the dimming glass will be powered off to keep it in an opaque state, avoiding invalid adjustment of the dimming glass, and achieving the purpose of saving energy and protecting equipment.

[0024] Furthermore, when it is determined that the air conditioner is in cooling mode, the control method of the present invention further includes: disconnecting the dimming glass from the power supply to minimize the light transmittance of the dimming glass. Through such a setting, it is possible to prevent sunlight from entering the interior of the external unit to transfer heat to the condenser, reduce the amount of heat absorbed by the condenser, and improve the heat dissipation effect of the condenser to meet the heat dissipation requirements of the condenser in cooling mode.

[0025] Furthermore, the condenser of the present invention includes a plurality of branch pipes, the shell includes a plurality of dimming glasses, the positions of the plurality of dimming glasses correspond to the positions of the plurality of branch pipes one by one, and the step of "obtaining the superheat at the outlet of the condenser" specifically includes: obtaining the superheat at the outlet of each branch pipe; the step of "selectively adjusting the transmittance of the dimming glass according to the superheat" specifically includes: selectively adjusting the transmittance of each dimming glass according to the superheat at the outlet of each branch pipe. Through such a setting, the dimming glass corresponding to each branch can be independently controlled to adjust the superheat at the outlet of each branch, so that the superheat of each branch can fluctuate within a reasonable range, thereby improving the control accuracy of the superheat, further improving the heat absorption and evaporation amount of the refrigerant in the condenser, and ensuring the stability and service life of the system.

[0026] In addition, the air conditioner further provided by the present invention on the basis of the above-mentioned control method has the technical effects possessed by the above-mentioned control method due to the adoption of the above-mentioned control method. Compared with the air conditioner before the improvement, the air conditioner of the present invention can use light to assist in adjusting the superheat of the refrigerant in the condenser, thereby improving the control accuracy, making the operation of the air conditioner more stable, extending the service life of the compressor, and at the same time improving the heat exchange efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of an outdoor unit of an air conditioner of the present invention;

[0029] Figure 2 is a flow chart of a method for controlling an air conditioner of the present invention;

[0030] Figure 3 It is a flow chart of an embodiment of a method for controlling an air conditioner according to the present invention.

[0031] List of reference numerals:

[0032] 1. Shell; 11. Dimming glass; 2. Condenser; 21. Main pipe; 22. Branch pipe. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] It should be noted that, in the description of the present invention, the terms "inside", "outside", and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] Based on the problem pointed out in the background technology that the existing air conditioner does not accurately control the suction superheat during operation, which affects the heat exchange efficiency and stability. The present invention provides a control method and air conditioner for an air conditioner, by arranging a dimming glass on the shell of an external unit so that light can be irradiated onto the condenser through the dimming glass, and the light transmittance of the dimming glass is controlled according to the superheat of the condenser, so as to achieve the effect of reasonably utilizing light energy to assist in adjusting the superheat.

[0037] Specifically, Figure 1 As shown, the external unit of the air conditioner of the present invention includes: a shell 1, the shell 1 includes a dimming glass 11, the dimming glass 11 is electrically connected to the power supply, the transmittance of the dimming glass 11 is the lowest in the power-off state, and the transmittance in the power-on state increases with the increase of voltage; a condenser 2, the condenser 2 is installed in the shell 1 near the dimming glass 11, and can allow sunlight to shine on the condenser 2 through the dimming glass 11.

[0038] Exemplarily, the housing 1 may be entirely composed of the dimming glass 11, or the dimming glass 11 may be used only in some positions, as long as the sunlight can penetrate the housing 1 and shine into the interior of the external unit. The present invention preferably sets the dimming glass 11 on the side of the housing 1 that receives the longest light exposure time, and installs the condenser 2 close to the inner side of the dimming glass 11, so that the sunlight can irradiate the surface of the condenser 2 to the greatest extent. At the same time, the surface of the condenser 2 may also be coated with a light-absorbing material to increase the heat absorption of the condenser 2.

[0039] The dimming glass 11 can switch between transparent and opaque states through various methods such as electrical control, temperature control, light control, and voltage control. Among them, the electrically controlled dimming glass 11 is the most common type, and its working mechanism is based on the electric field effect of liquid crystal molecules. Specifically, the dimming glass 11 is a layer of liquid crystal polymer sandwiched between two transparent conductive glasses. In the natural state, the liquid crystal molecules are arranged disorderly, and light will scatter when it shines on the glass, making the glass opaque; when the power is turned on, the electric field makes the liquid crystal molecules arranged in order, and the light can pass through the glass smoothly, making the glass transparent. By adjusting the size and direction of the voltage, the arrangement of the liquid crystal molecules can be controlled, thereby adjusting the light transmittance of the glass. The greater the voltage applied to the dimming glass 11, the higher its light transmittance, and the more transparent the glass is. The smaller the voltage applied to the dimming glass 11, the lower its light transmittance, and the more blurred the glass is.

[0040] In the heating mode of the air conditioner, condenser 2, as the evaporation side, needs to absorb heat to evaporate the refrigerant. Ideally, a certain degree of superheat needs to be maintained at its outlet, preferably set to 2°C, so that the refrigerant can evaporate fully and then enter the compressor in a vapor state, avoiding the wet stroke and potential liquid hammer risk caused by the liquid refrigerant entering the compressor.

[0041] However, if the superheat is too high, the load on the compressor will increase, the power consumption and exhaust temperature will increase, which may cause the compressor to overload and overheat, causing the compressor to frequently enter protective shutdown, affecting the heating efficiency and stability. At the same time, excessively high operating temperature will also damage the compressor and shorten its service life. Therefore, the superheat needs to be controlled within a reasonable range.

[0042] Since condenser 2 is installed in the outdoor unit of the air conditioner, it is easily affected by outdoor environmental factors such as light and temperature, making it difficult for its outlet to reach an ideal overheating state. For example, the heating mode is usually operated in winter, and the outdoor air temperature is low. If only convection heat exchange is performed between condenser 2 and the air, the refrigerant may not obtain enough heat.

[0043] Based on this, the present application creatively applies the dimming glass 11 to the shell 1 of the air conditioner outdoor unit, so that the shell 1 has light transmittance, and can increase the transmittance of the dimming glass 11 when the superheat is low, increase the intensity of sunlight on the condenser 2, so as to increase the heat supplement to the condenser 2, and then increase the heat absorption of the refrigerant; and when the superheat is high, the transmittance of the dimming glass 11 will be lowered, and the intensity of sunlight on the condenser 2 will be reduced, so as to reduce the heat supplement to the condenser 2, and then reduce the heat absorption of the refrigerant, thereby realizing auxiliary regulation of the superheat.

[0044] This can maintain a dynamic balance of superheat and keep it within a reasonable range, which not only helps to increase the heating capacity, but also allows the refrigerant to evaporate fully, preventing droplets from entering the compressor and causing the risk of wet stroke and liquid hammer, thereby improving the stability of the air conditioner and extending its service life.

[0045] Preferably, if Figure 2 As shown, based on the above air conditioner structure, the control method provided by the present invention includes:

[0046] S3000: When it is determined that the air conditioner is executing a heating mode, obtaining a superheat degree at an outlet of the condenser;

[0047] S4000: Selectively adjusts the light transmittance of the switchable glass according to the degree of overheating.

[0048] That is, after the air conditioner is turned on, the controller first determines whether the air conditioner is executing a heating mode or a cooling mode. When it is determined that the air conditioner is executing a heating mode, the superheat at the outlet of the condenser 2 is obtained.

[0049] Regarding the acquisition of superheat, in a preferred embodiment of the present invention, temperature sensors are provided inside and at the outlet of the evaporator main line 21 to detect the temperatures inside and at the outlet of the main line 21, respectively. The temperature inside the main line 21 can accurately reflect the saturation temperature when the refrigerant is completely evaporated, and the superheat at the outlet of the condenser 2 is obtained by calculating the difference between the two.

[0050] Preferably, if Figure 3 As shown in FIG. 1 , the step of “obtaining the superheat at the outlet of the condenser” specifically includes:

[0051] S3100: Obtain the outlet temperature of the condenser;

[0052] S3200: Acquire the internal temperature of the condenser;

[0053] S3300: Calculate the difference between the outlet temperature and the internal temperature to obtain the superheat at the outlet of the condenser.

[0054] Through such an arrangement, on the one hand, the saturation temperature of the refrigerant when evaporating can be measured by detecting the temperature inside the condenser 2, so that the calculated superheat is more accurate; on the other hand, the detection method is simple, reliable and easy to implement.

[0055] Preferably, if Figure 3 As shown, the step of “selectively adjusting the light transmittance of the switchable glass according to the degree of overheating” specifically includes:

[0056] S4100: Calculate the difference between the superheat and the target superheat;

[0057] S4200: Selectively adjust the light transmittance of the switchable glass according to the difference.

[0058] In the present invention, the target superheat is preferably set to 2°C. The target superheat can be used to calibrate the target value of superheat corresponding to the air conditioner under ideal conditions, providing a reference for dynamic control of superheat so that the actual superheat is as close to the target superheat as possible.

[0059] Preferably, if Figure 3 As shown, the step of “selectively adjusting the transmittance of the switchable glass according to the difference” specifically includes:

[0060] S4210: Compare the difference value with a preset difference value;

[0061] S4220: Selectively adjust the light transmittance of the switchable glass according to the comparison result.

[0062] In the present invention, the preset difference is preferably set to 1°C. The preset difference can be used to calibrate the controllable range of superheat, so that the superheat has a certain fluctuation space, that is, it fluctuates within a range of 1°C. The dimming glass 11 will be controlled only when the actual superheat exceeds this range, thereby avoiding too frequent control of the dimming glass 11 based on the target superheat.

[0063] Preferably, if Figure 3 As shown, the step of “selectively adjusting the transmittance of the switchable glass according to the comparison result” specifically includes:

[0064] S4221: if the difference is greater than a preset difference and the superheat is greater than a target superheat, reducing the light transmittance of the switchable glass; and / or

[0065] S4222: If the difference is greater than the preset difference and the superheat is less than the target superheat, increase the light transmittance of the switchable glass; and / or

[0066] S4223: If the difference is not greater than the preset difference, the transmittance of the switchable glass is not adjusted.

[0067] For example, taking the preferred target superheat of 2°C and the preset difference of 1°C in this case as an example, if the difference is greater than the preset difference and the superheat is greater than the target superheat, it means that the actual superheat is already greater than 3°C, and the transmittance of the dimming glass 11 needs to be reduced to reduce the intensity of sunlight on the condenser 2, thereby reducing the heat absorption of the refrigerant; if the difference is greater than the preset difference and the superheat is less than the target superheat, it means that the actual superheat is less than 1°C, and the transmittance of the dimming glass 11 needs to be increased to increase the intensity of sunlight on the condenser 2, thereby increasing the heat absorption of the refrigerant; if the difference is not greater than the preset difference, it means that the actual superheat is between 1°C and 3°C, which is within a reasonable fluctuation range, and there is no need to adjust the transmittance of the dimming glass 11.

[0068] Thereby, the actual superheat at the outlet of the condenser 2 can always fluctuate within a reasonable range around the target superheat, so as to maintain a dynamic balance of the superheat and ensure a good operating state of the air conditioner.

[0069] In practical applications, when outdoor light is weak, such as at night or on cloudy days, the auxiliary heating effect of light energy on the condenser 2 is negligible or even ineffective. At this time, if the dimming glass 11 is still powered to adjust the transmittance according to the change of superheat, it will cause a waste of electric energy. Based on this, Figure 3 As shown, before executing the step of "obtaining the superheat at the outlet of the condenser", the control method of the present invention further includes:

[0070] S1000: Get outdoor light intensity;

[0071] S2000: selectively obtaining the superheat at the outlet of the condenser or disconnecting the dimming glass from the power supply according to the light intensity.

[0072] It is used to judge whether the outdoor light intensity can provide heat energy for the condenser 2, so as to decide whether it is necessary to continue to supply power to the dimming glass 11 to adjust the transmittance, thereby avoiding the waste of electric energy and improving the intelligence of control.

[0073] Preferably, if Figure 3 As shown, the step of "selectively obtaining the superheat at the outlet of the condenser or disconnecting the connection between the dimming glass and the power supply according to the light intensity" specifically includes:

[0074] S2100: Compare the light intensity with a preset intensity;

[0075] S2110: If the light intensity is not lower than the preset intensity, obtaining the superheat at the outlet of the condenser; and / or

[0076] S2120: If the light intensity is lower than the preset intensity, disconnect the switchable glass from the power supply.

[0077] The air conditioner will supply power to the dimming glass 11 to adjust the transmittance only when the light is strong enough to provide heat energy for the condenser 2. When the light is weak and cannot provide heat energy for the condenser 2, the dimming glass 11 will be powered off to keep it in an opaque state, avoiding ineffective adjustment of the dimming glass 11, thereby saving energy and protecting equipment.

[0078] In addition, the adjustment of light transmittance is also meaningful in the cooling mode of the air conditioner. When the air conditioner is in cooling mode in summer, the condenser 2 changes from the evaporation side to the condensation side, and a large amount of heat needs to be dissipated outward. Therefore, the auxiliary heating effect of light is not required, and sunlight should be prevented from irradiating the condenser 2.

[0079] Preferably, if Figure 3 As shown, the control method of the present invention also includes:

[0080] S500: When it is determined that the air conditioner is executing the cooling mode, disconnect the dimming glass from the power supply to minimize the light transmittance of the dimming glass.

[0081] Through such a setting, sunlight can be prevented from entering the outside unit to transfer heat to the condenser 2, the heat absorption of the condenser 2 can be reduced, and the heat dissipation effect of the condenser 2 can be improved to meet the heat dissipation requirements of the condenser 2 in the cooling mode.

[0082] In addition, since the pipe of a main pipeline 21 is too long and the pressure drop is large, the refrigerant of the condenser 2 needs to be divided into multiple parallel branch pipelines 22. However, due to the limitation of the process level, it is difficult to ensure that the refrigerant is subjected to the same resistance in each branch pipeline, resulting in uneven flow distribution. However, the lengths of the branch pipelines 22 are equal. When the branch pipelines 22 absorb equal heat, the branch pipeline 22 with a small flow rate is more likely to evaporate and overheat, and then the superheat degree of each branch pipeline 22 will be different.

[0083] Based on this, Figure 1 As shown, in another preferred embodiment of the present invention, the condenser 2 includes a plurality of branch pipes 22, the shell 1 includes a plurality of dimming glasses 11, the positions of the plurality of dimming glasses 11 correspond one to one with the positions of the plurality of branch pipes 22, and temperature sensors are provided inside and at the outlet of each branch pipe 22 to detect the superheat at the outlet of each branch pipe 22, and the transmittance of each dimming glass 11 can be adjusted according to the superheat of the corresponding branch.

[0084] Therefore, the step of “obtaining the superheat at the outlet of the condenser” specifically includes:

[0085] Obtain the superheat at the outlet of each branch pipeline;

[0086] The step of “selectively adjusting the light transmittance of the switchable glass according to the degree of overheating” specifically includes:

[0087] According to the superheat at the outlet of each branch pipe, the light transmittance of each dimming glass is selectively adjusted individually.

[0088] Through such a setting, the dimming glass 11 corresponding to each branch can be independently controlled to adjust the superheat at the outlet of each branch, so that the superheat of each branch can fluctuate within a reasonable range, thereby improving the control accuracy of the superheat, further improving the heat absorption and evaporation amount of the refrigerant in the condenser 2, and ensuring the stability and service life of the system.

[0089] It should be noted that the control logic between each dimming glass 11 and the superheat at the outlet of each branch pipe 22 is the same as the above solution, which will not be repeated here.

[0090] In addition, the air conditioner further provided by the present invention on the basis of the above-mentioned control method has the technical effect possessed by the above-mentioned control method because it adopts the above-mentioned control method. Compared with the air conditioner before the improvement, the air conditioner of the present invention can use light to assist in adjusting the superheat of the refrigerant in the condenser 2, thereby improving the control accuracy, making the operation of the air conditioner more stable, and extending the service life of the compressor. At the same time, it improves the heat exchange efficiency and reduces energy consumption.

[0091] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The external unit of the air conditioner comprises: A housing, wherein the housing comprises a dimming glass, wherein the dimming glass is electrically connected to a power source, wherein the transmittance of the dimming glass is the lowest in a power-off state, and the transmittance of the dimming glass increases with an increase in voltage in a power-on state; A condenser, the condenser being installed in the housing at a position close to the dimming glass, so that sunlight can pass through the dimming glass and irradiate the condenser; The control method comprises: When it is determined that the air conditioner is executing a heating mode, obtaining a superheat degree at an outlet of the condenser; The light transmittance of the switchable glass is selectively adjusted according to the overheating degree.

2. The control method according to claim 1, characterized in that: The step of "selectively adjusting the light transmittance of the switchable glass according to the superheat" specifically includes: calculating a difference between the superheat and the target superheat; According to the difference, the light transmittance of the switchable glass is selectively adjusted.

3. The control method according to claim 2, characterized in that: The step of "selectively adjusting the light transmittance of the switchable glass according to the difference" specifically includes: comparing the difference with a preset difference; According to the comparison result, the light transmittance of the switchable glass is selectively adjusted.

4. The control method according to claim 3, characterized in that: The step of "selectively adjusting the light transmittance of the switchable glass according to the comparison result" specifically includes: If the difference is greater than the preset difference and the superheat is greater than the target superheat, the light transmittance of the switchable glass is reduced; and / or If the difference is greater than the preset difference and the superheat is less than the target superheat, increasing the light transmittance of the switchable glass; and / or If the difference is not greater than the preset difference, the light transmittance of the switchable glass is not adjusted.

5. The control method according to claim 1, characterized in that: The step of "obtaining the superheat at the outlet of the condenser" specifically includes: Obtaining the outlet temperature of the condenser; obtaining the internal temperature of the condenser; The difference between the outlet temperature and the internal temperature is calculated to obtain the superheat at the outlet of the condenser.

6. The control method according to claim 1, characterized in that: Before executing the step of "obtaining the superheat at the outlet of the condenser", the control method of the present invention further includes: Get the outdoor light intensity; According to the light intensity, the superheat at the outlet of the condenser is selectively obtained or the connection between the dimming glass and the power supply is disconnected.

7. The control method according to claim 6, characterized in that: The step of "selectively obtaining the superheat at the outlet of the condenser or disconnecting the connection between the dimming glass and the power supply according to the light intensity" specifically includes: comparing the light intensity with a preset intensity; If the illumination intensity is not lower than the preset intensity, obtaining the superheat at the outlet of the condenser; and / or If the light intensity is lower than the preset intensity, the connection between the dimming glass and the power source is disconnected.

8. The control method according to claim 1, characterized in that: When it is determined that the air conditioner is executing a cooling mode, the control method of the present invention further includes: The connection between the dimming glass and the power supply is disconnected to minimize the light transmittance of the dimming glass.

9. The control method according to claim 1, characterized in that: The condenser includes a plurality of branch pipes, the shell includes a plurality of dimming glasses, the positions of the plurality of dimming glasses correspond to the positions of the plurality of branch pipes one by one, and the step of "obtaining the superheat at the outlet of the condenser" specifically includes: Obtaining the superheat at the outlet of each branch pipeline; The step of "selectively adjusting the light transmittance of the switchable glass according to the superheat" specifically includes: The light transmittance of each piece of the dimming glass is selectively and individually adjusted according to the superheat at the outlet of each branch pipe.

10. An air conditioner, characterized in that: The air conditioner includes a controller configured to be able to execute the control method according to any one of claims 1 to 9.

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