CN117628634A - Method and device for controlling air conditioner and air conditioner - Google Patents

Abstract

The application relates to the technical field of intelligent household appliances and discloses a method for controlling an air conditioner, wherein the air conditioner comprises a valve box assembly arranged on a connecting pipeline of an indoor unit and an outdoor unit; the valve box component comprises an indoor unit throttle valve, a supercooling heat exchanger and a supercooling valve; the method comprises the following steps: under the condition of an air conditioner operation refrigeration mode, acquiring the current supercooling degree of an outlet end of a supercooling heat exchanger and the operation parameters of a compressor; determining to adjust the supercooling valve under the condition that the current supercooling degree and the running parameters of the compressor meet the corresponding preset parameters; and determining a target regulating strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and regulating record information of the supercooling valve, and executing. The method ensures that the adjustment of the supercooling valve is more targeted, and improves the adjustment precision. And the supercooling degree of the air conditioning refrigerant is more stable, and the noise regulation and control effect is obviously improved. The application also discloses a device for controlling the air conditioner and the air conditioner.

Description

Method and device for controlling air conditioner and air conditioner

Technical Field

The application relates to the technical field of intelligent household appliances, and for example relates to a method and device for controlling an air conditioner and the air conditioner.

Background

Noise is generated when an air conditioner is operated, and is one of important factors affecting the user's use experience. In order to reduce noise, noise is usually reduced by adjusting the opening of an electronic expansion valve in an indoor unit, adding a vibration-damping and sound-insulating material, and the like.

The air conditioner in the related art comprises an indoor unit, an outdoor unit, an air pipe pipeline, a liquid pipe pipeline, a cooling branch and a supercooling heat exchanger; the air pipe and the liquid pipe are arranged between the indoor unit and the outdoor unit, the outdoor unit comprises an outdoor pipeline, a compressor, an outdoor heat exchanger and a first throttling component, the compressor, the outdoor heat exchanger and the first throttling component are arranged on the outdoor pipeline, and the indoor unit comprises an indoor pipeline and an indoor heat exchanger arranged on the indoor pipeline; the cooling branch is characterized in that a first one-way valve is arranged on the air pipe, a second one-way valve is arranged on the cooling branch, two ends of the cooling branch are respectively connected with the air pipe, connection points of the cooling branch are respectively located at two sides of the first one-way valve, a part of the cooling branch is arranged in the supercooling heat exchanger, and a part of the liquid pipe is arranged in the supercooling heat exchanger to exchange heat.

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:

the flow of the refrigerant in the cooling branch is not controlled. Especially in the refrigeration process, the refrigerant flow in the cooling branch cannot be accurately controlled, and the refrigerant has the condition of flash. Further, the refrigerant noise of the indoor unit cannot be effectively treated.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a method and a device for controlling an air conditioner and the air conditioner, so as to effectively improve refrigerant noise of an indoor unit.

In some embodiments, an air conditioner includes an indoor unit and an outdoor unit connected by a pipe, and a valve box assembly disposed on the pipe; the valve box assembly comprises an indoor unit throttle valve, a supercooling heat exchanger and a supercooling valve; the method comprises the following steps: under the condition of an air conditioner operation refrigeration mode, acquiring the current supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor; determining to adjust the supercooling valve under the condition that the current supercooling degree and the operation parameters of the compressor meet corresponding preset parameters; determining a target regulation strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and regulation record information of the supercooling valve; and controlling the supercooling valve to execute the target regulation strategy.

In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to perform the method for controlling an air conditioner as described previously when the program instructions are executed.

In some embodiments, the air conditioner includes: the valve box assembly is arranged on a pipeline connected with the indoor unit and the outdoor unit of the air conditioner and comprises an indoor unit throttle valve, a supercooling heat exchanger and a supercooling valve; when the air conditioner operates in a refrigeration mode and the supercooling degree is adjusted, the refrigerant flowing through the supercooling heat exchanger flows into the indoor heat exchanger through the indoor unit throttle valve, and flows back to the compressor through the supercooling valve; and, the apparatus for controlling an air conditioner as described above.

The method and the device for controlling the air conditioner and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

in the air conditioner refrigeration mode, whether supercooling degree adjustment of the refrigerant is needed or not is determined by detecting the operation parameters of the air conditioner. And under the condition that the supercooling degree of the refrigerant is determined to be required to be regulated, determining and executing a target regulation strategy of the supercooling valve based on the current supercooling degree, the target supercooling degree of the refrigerant and the regulation record of the supercooling valve. Therefore, the adjustment of the supercooling valve is more targeted, and the adjustment precision is improved. And the supercooling degree of the air conditioning refrigerant is more stable, and the noise regulation and control effect is obviously improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 5 is a schematic view of an apparatus for controlling an air conditioner provided in an embodiment of the present disclosure;

fig. 6 is a schematic view of another apparatus for controlling an air conditioner provided in an embodiment of the present disclosure.

Reference numerals:

10: an indoor unit; 11: an indoor heat exchanger; 20: an outdoor unit; 21: a compressor; 22: a four-way valve; 23: an outdoor heat exchanger; 30: a valve box assembly; 31: a supercooling heat exchanger; 32: an indoor unit throttle valve; 33: a supercooling valve; 41: a liquid pipe; 42: and an air pipe.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.

Referring to fig. 1, the air conditioner includes an indoor unit 10, an outdoor unit 20, and a valve box assembly 30. The indoor unit 10 and the outdoor unit 20 are connected by a pipe including a liquid pipe 41 and an air pipe 42. The valve box assembly 30 is disposed on a pipeline, and includes an indoor unit throttle valve 32, a supercooling heat exchanger 31, and a supercooling valve 33. Specifically, the supercooling heat exchanger 31 is provided on the liquid pipe 41. The liquid pipe 41 is a pipe through which a liquid refrigerant flows in the cooling mode. The supercooling heat exchanger 31 includes a main path connected to the liquid pipe and an auxiliary path connected to the gas pipe 42. The auxiliary road is provided with a supercooling valve 33, and under the condition that the supercooling degree of the air conditioner does not need to be regulated, the supercooling valve 33 is closed, and the auxiliary road is not conducted. The indoor unit throttle valve 32 is provided in a liquid pipe 41 between the superheating heat exchanger 31 and the indoor unit, and the indoor refrigerant is adjusted by adjusting the indoor unit throttle valve 32. The outdoor unit includes a compressor 21, a four-way valve 22, and an outdoor heat exchanger 23. The indoor unit includes an indoor heat exchanger 11.

When the air conditioner is in heating operation, the high-temperature high-pressure gaseous refrigerant flowing out of the compressor 21 is diverted through the four-way valve 22 and flows into the indoor heat exchanger 11 through the pipe. After heat exchange, the refrigerant flows into the outdoor heat exchanger 23 through the indoor unit throttle valve 32 and the supercooling heat exchanger 31, and flows back to the compressor through the four-way valve 22. In this process, the supercooling heat exchanger 31 of the valve box assembly does not perform any heat exchange, and the supercooling valve 33 is in a closed state, and the refrigerant does not flow through the auxiliary passage of the supercooling heat exchanger 31.

During the refrigerating operation of the air conditioner, the high-temperature and high-pressure gaseous refrigerant flowing out of the compressor 21 flows into the outdoor heat exchanger 23 through the four-way valve 22, exchanges heat and then flows into the supercooling heat exchanger 31 and the indoor unit throttle valve 32 through the liquid pipe 41. And then flows into the indoor heat exchanger 11 to exchange heat, and finally flows back to the compressor 21 through the air pipe 42. When the refrigerant flows through the supercooling heat exchanger 31, if the air conditioner needs to perform supercooling degree adjustment, the supercooling valve 33 opens a part of the refrigerant to flow into the auxiliary passage of the supercooling heat exchanger 31. Heat exchange with the refrigerant flowing into the main path of the supercooling heat exchanger 31 increases the temperature and decreases the pressure of the refrigerant flowing back to the compressor 21, and simultaneously decreases the temperature of the refrigerant flowing into the indoor heat exchanger 11. If the air conditioner does not need to perform the supercooling degree adjustment, the supercooling valve 33 is closed and the refrigerant does not perform the heat exchange in the supercooling heat exchanger 31. And directly into the indoor unit through the indoor unit throttle valve 32.

Thus, by externally arranging the indoor unit throttle valve 32, noise generated when the air conditioner is used is reduced away from the user. And the opening degree of the supercooling valve 33 is adjusted according to the supercooling degree of the air conditioner operation, so that the probability of refrigerant flash is reduced. Thereby reducing the abnormal sound generated by the refrigerant of the indoor unit during the refrigeration operation.

As shown in connection with fig. 2, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:

s101, under the condition of an air conditioner operation refrigeration mode, the processor acquires the current supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor.

S102, determining to adjust the supercooling valve by the processor under the condition that the current supercooling degree and the operation parameters of the compressor meet the corresponding preset parameters.

And S103, the processor determines a target regulation strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and regulation record information of the supercooling valve.

S104, the processor controls the supercooling valve to execute the target regulation strategy.

Here, in the cooling mode, the temperature of the outlet end of the supercooling heat exchanger is detected by a temperature sensor provided at the outlet end of the supercooling heat exchanger. And calculating the difference between the detection temperature and the saturation temperature based on the saturation temperature, thereby obtaining the current supercooling degree of the outlet end of the supercooling heat exchanger. Meanwhile, the operation parameters such as the exhaust temperature, the return air temperature, the exhaust pressure and the return air pressure of the compressor can be detected through temperature sensors and pressure sensors arranged at the exhaust port and the return air port of the compressor.

Further, whether the supercooling degree of the refrigerant and the operation parameters of the compressor meet preset parameters is judged. If the current state of the supercooling valve is not satisfied, the supercooling degree adjustment is not needed, and the current state of the supercooling valve is maintained. If so, it indicates that supercooling degree control is required. That is, the opening degree of the supercooling valve needs to be adjusted so that the supercooling degree is maintained at the target value. Specifically, according to the supercooling degree, the target supercooling degree and the adjustment record information of the supercooling valve, an adjustment strategy of the supercooling valve is determined. The adjustment record information of the supercooling valve refers to the adjustment record of the supercooling valve when the machine is started for refrigeration. The adjustment record comprises information such as adjustment time, supercooling degree, adjustment action direction (adjustment of small or large), adjustment amplitude and the like. Thus, based on the adjustment record and the current supercooling degree information, the adjustment action direction and the adjustment amplitude of the current supercooling valve are determined. Therefore, the adjustment of the supercooling valve is more targeted, and the supercooling degree is ensured to be in the target supercooling degree range. Thereby avoiding the flash of the refrigerant and effectively improving the noise. Meanwhile, the operation parameters of the compressor are prevented from exceeding the operation protection range of the compressor, and the operation of the air conditioning system is more stable.

By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, in the air conditioner refrigeration mode, whether the supercooling degree adjustment of the refrigerant is needed is determined by detecting the operation parameters of the air conditioner. And under the condition that the supercooling degree of the refrigerant is determined to be required to be regulated, determining and executing a target regulation strategy of the supercooling valve based on the current supercooling degree of the outlet end of the cold heat exchanger, the target supercooling degree of the refrigerant and the regulation record of the supercooling valve. Therefore, the adjustment of the supercooling valve is more targeted, and the adjustment precision is improved. And the supercooling degree of the air conditioning refrigerant is more stable, and the noise regulation and control effect is obviously improved.

Optionally, in step S102, the processor determines that the supercooling degree and the operation parameter of the compressor both satisfy the corresponding preset parameters by:

the current subcooling degree is less than or equal to the target subcooling degree, the exhaust temperature is greater than the first exhaust temperature and less than or equal to the second exhaust temperature, and the return air superheat degree is greater than the target return air superheat degree.

Here, since the refrigerant flowing through the supercooling throttle flows back to the compressor after heat exchange, supercooling degree adjustment affects the degree of superheat of the return air and the discharge temperature of the compressor. If the current subcooling degree is greater than the target subcooling degree, the return air superheat degree may be higher, and the compressor discharge temperature is higher. When the current supercooling degree is smaller than the target supercooling degree, the air return superheat degree is lower, and the performance of the compressor is affected. Therefore, whether the supercooling degree of the air conditioning system needs to be adjusted is determined by judging the current supercooling degree, the exhaust temperature and the return air superheat degree. The adjustment of the supercooling degree is performed only if all three parameters satisfy preset parameters.

Optionally, in step S103, the processor determines a target adjustment strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree, and adjustment record information of the supercooling valve, including:

and S131, determining the target opening degree of the supercooling valve as a first opening degree by the processor under the condition that the adjustment record indicates that the supercooling valve is not excessively adjusted in the starting refrigeration.

And S132, under the condition that the regulation record indicates that the overcorrection valve is excessively regulated in the current start-up refrigeration, the processor determines a target regulation strategy of the overcorrection valve according to the current overcooling degree, the target overcooling degree and the regulation information of the last overcorrection valve.

Here, when the power-on refrigeration is performed this time, if the over-regulation of the supercooling valve does not occur, the current regulation is indicated as the first regulation. The target opening degree of the supercooling valve is the first opening degree. The first opening degree is an initial operation opening degree of the supercooling valve set based on the type of the air conditioning system. Different air conditioning system types and different initial motion opening degrees. In addition, the adjusting action direction of the supercooling valve can be determined according to the current supercooling degree and the target supercooling degree. And if the current supercooling degree is greater than the target supercooling degree, reducing the opening degree of the supercooling valve. And if the current supercooling degree is smaller than the target supercooling degree, adjusting the opening degree of the supercooling valve. The target supercooling degree may be a specific value or a range of values.

If the overcorrection valve occurs, a target opening degree of the overcorrection valve is determined based on the adjustment information of the last overcorrection valve. The last subcooling valve adjustment information refers to the last subcooling valve adjustment information that is closest to the current adjustment. As one example, the adjustment record of the subcooling valve indicates that the opening of the subcooling valve was last turned down and the adjustment amplitude is a first amplitude. And determining the opening degree of the supercooling valve which still needs to be reduced according to the current supercooling degree and the target supercooling degree. The adjustment amplitude may be determined based on a magnitude relationship of a first subcooling difference of a last subcooling degree and a target subcooling degree, and a second subcooling difference of a current subcooling degree and a target subcooling degree. If the first supercooling difference is larger than the second supercooling difference, and the difference is larger, the adjusting amplitude is smaller. The larger the difference value between the two difference values is, the better the last adjusting effect is, and therefore the amplitude of the current adjustment is smaller. Likewise, the smaller the difference between the two differences, the smaller the change in supercooling degree after the last adjustment. Therefore, the amplitude of the current adjustment needs to be increased. Thus, the target strategy of the supercooling valve is determined based on the last adjustment effect and the current demand. The control precision is higher, and the regulation and control speed is high. The supercooling degree reaches the target supercooling degree, and noise generated by flash evaporation of the refrigerant is avoided. At the same time, the problem of control lead or lag of traditional feedback regulation can be avoided. The stability of the regulation of the air conditioning system is improved.

Optionally, in step S132, the processor determines a target adjustment strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and the adjustment information of the last supercooling valve, including:

the processor obtains a first supercooling difference value of the current supercooling degree and the target supercooling degree, a second supercooling difference value of the supercooling degree and the target supercooling degree when the supercooling valve is adjusted last time, and a first ratio of the second supercooling difference value to the first supercooling difference value.

The processor determines a target regulation strategy of the supercooling valve according to the first ratio and the second supercooling difference value.

Here, the adjustment information of the last supercooling valve includes a recorded cold overdetection value, that is, a supercooling degree at the time of adjusting the supercooling valve. Respectively obtaining a first supercooling difference b of the current supercooling degree and the target supercooling degree _c Second supercooling difference a between supercooling degree and target supercooling degree when regulating supercooling valve last time _c . And obtaining a first ratio A of the second supercooling difference to the first supercooling difference _c ＝a _c /b _c . The adjusting action direction and the adjusting amplitude of the supercooling valve can be determined through the first ratio and the second supercooling difference. As one example, a second subcooling difference value greater than zero indicates that the last time the subcooling valve was adjusted the subcooling degree was greater than the target subcooling degree. And if the first ratio is smaller than zero, the current supercooling degree is smaller than the target supercooling degree. Further, when the opening degree of the supercooling valve is reduced last time, the opening degree of the supercooling valve should be increased this time. In addition, the adjusting step length of the supercooling valve is determined according to the first ratio. For example, the larger the first ratio, the more the step size is adjustedIs small. As described above, the larger the first ratio, the more significantly the first subcooling difference between the current subcooling degree and the target subcooling is reduced after the last adjustment of the subcooling valve. Therefore, the amplitude of the current adjustment is small.

Optionally, the processor determines a target adjustment strategy of the supercooling valve according to the first ratio and the second supercooling difference, including:

under the condition that the second supercooling difference value is a negative value, if the first ratio is a negative value, the processor determines to adjust the opening of the supercooling valve, and adjusts the step length to be a first step length; if the first ratio is positive, the processor determines to increase the opening of the subcooling valve and the adjustment step decreases as the first ratio increases.

If the first ratio is a negative value under the condition that the second supercooling difference value is a positive value, the processor determines to increase the opening of the supercooling valve, and adjusts the step length to be a first step length; if the first ratio is positive, the processor determines to decrease the opening of the subcooling valve and the adjustment step decreases as the first ratio increases.

Here, based on the second supercooling difference a _c And a first ratio A _c And determining a target modulation strategy for the super-cooled valve. If the second subcooling difference is negative and the first ratio is also negative (i.e., a _c ＜0、A _c < 0). Then it is indicated that the first subcooling difference is positive (i.e., b _c > 0), i.e., the current supercooling degree is greater than the target supercooling degree. At this time, the opening of the supercooling valve is determined to be reduced, and the adjustment step length is the first step length. The first step size is the step size of the minimum adjusting amplitude. The adjustment operation directions of the two adjacent supercooling valves are opposite, and in this case, the adjustment is performed with the minimum amplitude. If the second subcooling difference is negative and the first ratio is positive (i.e., a _c < 0, i.e. A _c > 0). Then it is indicated that the first subcooling difference is negative (i.e., b _c < 0), i.e., the current supercooling degree is less than the target supercooling degree. At this time, it is determined to increase the opening of the supercooling valve, and the adjustment step size depends on the magnitude of the first ratio. The larger the first ratio, the smaller the adjustment step. Thereby enabling the supercooling degree to rapidly reach the target supercooling degree.

Likewise, if the second subcooling difference is positive andthe first ratio is negative (i.e. a _c ＞0，A _c < 0). Then it is indicated that the first subcooling difference is negative (i.e., b _c < 0), i.e., the current supercooling degree is less than the target supercooling degree. At this time, it is determined to increase the opening of the supercooling valve, and the adjustment step is the first step. The first step size is the step size of the minimum adjusting amplitude. The second supercooling difference value is different from the first supercooling difference value in positive and negative, and the adjusting action directions of the two supercooling valves are opposite. In this case, the current time is adjusted with the minimum amplitude. If the second subcooling difference is positive and the first ratio is positive (i.e., a _c ＞0，A _c > 0). Then it is indicated that the first subcooling difference is positive (i.e., b _c > 0), i.e., the current supercooling degree is greater than the target supercooling degree. At this time, it is determined to decrease the opening of the supercooling valve, and the adjustment step size depends on the magnitude of the first ratio. The larger the first ratio, the smaller the adjustment step.

In some embodiments, when the first ratio is a positive value, the first ratio may be divided into a plurality of interval values, each interval corresponding to a different adjustment step. For example, as shown in Table 1, a first ratio A _c Divided into five sections, A respectively _c ≥A _c1 、A _c2 ≤A _c ＜A _c1 、A _c3 ≤A _c ＜A _c2 、A _c4 ≤A _c ＜A _c3 、A _c5 ≤A _c ＜A _c4 The corresponding adjustment step for each interval is F (Dx), dx=g+e. Wherein Dx is the current supercooling valve action level, G is the last supercooling valve action level, and E is the supercooling valve action correction parameter. E increases as the first ratio decreases, and the value of each correction parameter E represents an opening. The larger the value is, the larger the opening degree is. The value-2 is the minimum value, and the opening is the minimum opening. The value 2 is the maximum value, and the opening is the maximum opening. Furthermore, the current opening pc=bx+cx of the regulated supercooling valve is F (Dx). Bx is the opening before the adjustment of the supercooling valve, cx is the adjustment action direction of the supercooling valve, i.e. the adjustment size is adjusted. It may be provided that cx=1 when the valve opening is increased and cx= -1 when the valve opening is decreased. As an example, at a _c ＞0，A _c The value range is A _c2 ≤A _c ＜A _c1 When e= -1, cx= -1, pc=bx-F (G-1). As a means ofAnother example, at a _c ＜0，A _c The value range is A _c2 ≤A _c ＜A _c1 When e= -1, cx=1, pc=bx+f (G-1).

TABLE 1

A c Is a range of values of (a)	Value of E
		A c ≥A c1	-2
A c2 ≤A c ＜A c1	-1
		A c3 ≤A c ＜A c2	0
A c4 ≤A c ＜A c3	1
		A c5 ≤A c ＜A c4	2

As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

s201, under the condition of an air conditioner operation refrigeration mode, the processor acquires the current supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor.

S202, under the condition that the current supercooling degree and the running parameters of the compressor meet the corresponding preset parameters, the processor obtains the time length of the last adjustment time and the current time of the supercooling valve.

And S203, determining to adjust the supercooling valve by the processor under the condition that the duration is greater than or equal to the preset duration.

S204, the processor determines a target regulation strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and regulation record information of the supercooling valve.

S205, the processor controls the supercooling valve to execute the target adjusting strategy.

Here, a preset time period is set for the time interval as supercooling regulation. That is, the time interval between two adjacent supercooling degree adjustment cannot be smaller than the preset time length, so that the problem that an air conditioning system is unstable due to frequent actions of a supercooling valve caused by frequent adjustment is avoided.

As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

s301, an air conditioner operates in a refrigeration mode.

S302, the processor acquires the supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor.

S303, determining to adjust the supercooling valve by the processor under the condition that the supercooling degree and the operation parameters of the compressor meet the corresponding preset parameters.

S304, the processor determines a target regulation strategy of the supercooling valve according to the supercooling degree, the target supercooling degree and regulation record information of the supercooling valve.

S305, the processor controls the supercooling valve to execute the target adjusting strategy.

S306, the processor obtains the current return air superheat degree of the compressor.

S307, the processor determines a target regulation strategy of the indoor unit throttle valve according to the current return air superheat degree, the target superheat degree and regulation record information of the indoor unit throttle valve; and executed.

Here, the air conditioner also monitors the degree of superheat of the return air of the compressor when operating in the cooling mode. And then the opening degree of the electronic expansion valve of the indoor unit is adjusted based on the superheat degree of the return air. Specifically, the target adjustment strategy of the throttle valve may be determined based on the current return air superheat degree, the target superheat degree, and an adjustment record of the indoor-unit throttle valve (hereinafter simply referred to as throttle valve). The adjusting record of the throttle valve refers to the adjusting record of the throttle valve in the process of the current start-up operation refrigeration mode. Therefore, the adjusting strategy of the throttle valve is more accurately determined by combining the adjusting record and the current air return superheat degree.

Optionally, in step S307, the processor determines a target adjustment strategy of the indoor unit throttle valve according to the current air return superheat degree, the target superheat degree, and adjustment record information of the indoor unit throttle valve, including:

and under the condition that the regulation record information indicates that the indoor unit throttle valve is not regulated when the starting refrigeration is performed, the processor determines that the target regulation opening degree of the indoor throttle valve is the second opening degree.

And under the condition that the regulation record information indicates that the indoor unit throttle valve is adjusted excessively in the current start-up refrigeration, the processor determines a target regulation strategy of the indoor throttle valve according to the air return superheat degree, the target superheat degree and the information of regulating the indoor unit throttle valve last time.

Here, when the power-on refrigeration is performed this time, if the over-regulation throttle valve does not occur, the current regulation is indicated as the first regulation. The target opening degree of the throttle valve is the first opening degree. The first opening is an initial operation opening of the throttle valve set based on the type of the air conditioning system. Different air conditioning system types and different initial motion opening degrees. In addition, the adjusting action direction of the throttle valve can be determined according to the current air return superheat degree and the target superheat degree. And if the current superheat degree is greater than the target superheat degree, the opening degree of the throttle valve is increased. And if the current superheat degree is smaller than the target superheat degree, regulating the opening degree of the throttle valve. The target degree of superheat may be a specific value or a range of values.

If an over-regulation of the throttle valve occurs, a target opening degree of the throttle valve is determined based on the regulation information of the throttle valve last time. The last throttle adjustment information refers to the last throttle adjustment information that is the most recent time from the current adjustment. Respectively obtaining a first superheat difference value b of the current return air superheat degree and the target superheat degree _h Upper, upperSecond superheat difference a between the return air superheat degree and the target superheat degree in secondary throttle valve adjustment _h . And obtaining a second ratio A of the second superheat difference to the first superheat difference _h ＝a _h /b _h . The adjusting action direction of the throttle valve can be determined by the second ratio and the second overheat difference. And determining the adjusting step length of the throttle valve according to the second ratio. For example, the larger the second ratio, the smaller the adjustment step.

Further, based on the second superheat difference value a _h And a second ratio A _h And determining a target adjustment strategy for the throttle valve. If the second superheat difference is negative and the second ratio is also negative (i.e., a _h ＜0、A _h < 0). Then it is indicated that the first superheat difference is positive (i.e., b _h > 0), i.e., the current return air superheat is greater than the target superheat. At this time, the opening degree of the throttle valve is determined to be increased, and the adjustment step length is a first step length. The first step size is the step size of the minimum adjusting amplitude. The adjusting action directions of the adjacent throttle valves are opposite, and in this case, the adjustment is performed with the minimum amplitude. If the second superheat difference is negative and the first ratio is positive (i.e., a _h ＜0、A _h > 0). Then it is indicated that the first superheat difference is negative (i.e., b _h < 0), i.e., the current return air superheat is less than the target superheat. At this time, the opening degree of the throttle valve is determined to be adjusted, and the adjustment step size depends on the magnitude of the second ratio. The larger the second ratio, the smaller the adjustment step. Thereby the superheat degree of the return air can reach the target superheat degree rapidly. Likewise, the adjustment strategy when the second superheat difference is positive may be determined, and will not be described in detail herein. Further, in some embodiments, when the second ratio is positive, the second ratio may be divided into a plurality of interval values, each interval corresponding to a different adjustment step. See in particular table 1 above.

As shown in conjunction with fig. 5, an embodiment of the present disclosure provides an apparatus for controlling an air conditioner, including an acquisition module 51, a first determination module 52, a second determination module 53, and a control module 54. The obtaining module 51 is configured to obtain the current supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor in the case of the air conditioning operation refrigeration mode. The first determination module 52 is configured to determine to adjust the subcooling valve if both the current subcooling degree and the operating parameter of the compressor satisfy corresponding preset parameters. The second determination module 53 is configured to determine a target adjustment strategy for the subcooling valve based on the current subcooling degree, the target subcooling degree, and adjustment record information for the subcooling valve. The control module 54 is configured to control the subcooling valve to execute a target modulation strategy.

By adopting the device for controlling the air conditioner provided by the embodiment of the disclosure, whether the supercooling degree of the refrigerant is required to be adjusted is determined by detecting the operation parameters of the air conditioner in the air conditioner refrigeration mode. And under the condition that the supercooling degree of the refrigerant is determined to be required to be regulated, determining and executing a target regulation strategy of the supercooling valve based on the refrigerant supercooling degree, the target refrigerant supercooling degree and the regulation record of the supercooling valve. Therefore, the adjustment of the supercooling valve is more targeted, and the adjustment precision is improved. And the supercooling degree of the air conditioning refrigerant is more stable, and the noise regulation and control effect is obviously improved.

As shown in connection with fig. 6, an embodiment of the present disclosure provides an apparatus for controlling an air conditioner, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling an air conditioner of the above-described embodiment.

Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.

The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, i.e., implements the method for controlling an air conditioner in the above-described embodiments.

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

The embodiment of the disclosure provides an air conditioner, which comprises the device for controlling the air conditioner.

The disclosed embodiments provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling an air conditioner.

The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A method for controlling an air conditioner, the air conditioner including an indoor unit and an outdoor unit connected through a pipe, and a valve box assembly disposed on the pipe; the valve box assembly is characterized by comprising an indoor unit throttle valve, a supercooling heat exchanger and a supercooling valve; the method comprises the following steps:

under the condition of an air conditioner operation refrigeration mode, acquiring the current supercooling degree of the outlet end of the supercooling heat exchanger and the operation parameters of the compressor;

determining to adjust the supercooling valve under the condition that the current supercooling degree and the operation parameters of the compressor meet corresponding preset parameters;

determining a target regulation strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and regulation record information of the supercooling valve;

and controlling the supercooling valve to execute the target regulation strategy.

2. The method of claim 1, wherein the determining the target adjustment strategy for the subcooling valve based on the current subcooling degree, a target subcooling degree, and adjustment record information for the subcooling valve comprises:

under the condition that the regulation record indicates that the current start-up refrigeration does not occur over regulation of the indoor unit throttle valve, determining the target opening of the supercooling valve as a first opening;

and under the condition that the regulation record indicates that the current start-up refrigeration is over-regulated on the indoor unit throttle valve, determining a target regulation strategy of the supercooling valve according to the current supercooling degree, the target supercooling degree and the regulation information of the last supercooling valve.

3. The method of claim 2, wherein the determining the target adjustment strategy for the super-cooled valve based on the current, target and last adjustment information for the super-cooled valve comprises:

acquiring a first supercooling difference value of the current supercooling degree and the target supercooling degree, a second supercooling difference value of the supercooling degree and the target supercooling degree when the supercooling valve is adjusted last time, and a first ratio of the second supercooling difference value to the first supercooling difference value;

and determining a target regulation strategy of the supercooling valve according to the first ratio and the second supercooling difference value.

4. The method of claim 3, wherein determining the target modulation strategy for the subcooling valve based on the first ratio, the magnitude of the second subcooling difference, comprises:

under the condition that the second supercooling difference value is a negative value, if the first ratio is a negative value, determining to reduce the opening of the supercooling valve, and adjusting the step length to be a first step length; if the first ratio is positive, determining to increase the opening of the supercooling valve, and reducing the adjustment step length along with the increase of the first ratio;

if the first ratio is a negative value under the condition that the second supercooling difference value is a positive value, determining to increase the opening of the indoor unit throttle valve, and adjusting the step length to be a first step length; and if the first ratio is a positive value, determining to adjust the opening of the throttle valve of the indoor unit, wherein the adjustment step length is reduced along with the increase of the first ratio.

5. The method of claim 1 wherein the operating parameters of the compressor include discharge temperature and return air superheat; the current supercooling degree and the operation parameters of the compressor are determined to meet the corresponding preset parameters in the following manner:

the current supercooling degree is less than or equal to the target supercooling degree, the exhaust temperature is greater than the first exhaust temperature and less than or equal to the second exhaust temperature, and the return air superheat degree is greater than the target return air superheat degree.

6. The method of any one of claims 1 to 5, wherein the determining before adjusting the subcooling valve further comprises:

acquiring the time length between the last adjustment time of the supercooling valve and the current time;

and under the condition that the duration is longer than the preset duration, determining to adjust the supercooling valve.

7. The method according to any one of claims 1 to 5, further comprising:

acquiring the current return air superheat degree of the compressor;

determining a target regulation strategy of the indoor unit throttle valve according to the current return air superheat degree, the target superheat degree and regulation record information of the indoor unit throttle valve; and executed.

8. The method of claim 7, wherein determining the target adjustment strategy for the indoor unit throttle valve based on the current return air superheat, the target superheat, and adjustment record information for the indoor unit throttle valve comprises:

determining that the target adjusting opening degree of the indoor throttle valve is a second opening degree under the condition that the adjusting record information indicates that the indoor unit throttle valve is not adjusted when the indoor unit is started for refrigeration; or alternatively, the first and second heat exchangers may be,

and under the condition that the regulation record information indicates that the indoor unit throttle valve is regulated when the start-up refrigeration occurs, determining a target regulation strategy of the indoor throttle valve according to the current air return superheat degree, the target superheat degree and the information of regulating the indoor unit throttle valve last time.

9. An apparatus for controlling an air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling an air conditioner according to any one of claims 1 to 8 when the program instructions are run.

10. An air conditioner, comprising:

the valve box assembly is arranged on a pipeline connected with the indoor unit and the outdoor unit of the air conditioner and comprises an indoor unit throttle valve, a supercooling heat exchanger and a supercooling valve; when the air conditioner operates in a refrigeration mode and the supercooling degree is adjusted, the refrigerant flowing through the supercooling heat exchanger flows into the indoor heat exchanger through the indoor unit throttle valve, and flows back to the compressor through the supercooling valve; and, a step of, in the first embodiment,

the apparatus for controlling an air conditioner as claimed in claim 9.