WO2023005012A1 - Air conditioner and control method therefor, and computer-readable storage medium - Google Patents

Abstract

An air conditioner, a control method for an air conditioner, and a computer-readable storage medium. The control method comprises: when the air conditioner is in a refrigeration operation, obtaining an indoor heat exchanger temperature of the air conditioner, and obtaining a target frequency of a compressor under a current operating condition of the air conditioner; determining a frequency parameter according to the indoor heat exchanger temperature and the target frequency; and controlling the compressor to operate according to the frequency parameter, such that an air outlet temperature of the air conditioner is greater than a target temperature.

Description

Air conditioner, control method thereof, and computer-readable storage medium

priority information

This application claims priority to a Chinese patent application with application number 202110874115.3 filed on July 30, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of air conditioners, and in particular to an air conditioner control method, an air conditioner, and a computer-readable storage medium.

Background technique

With the development of economy and technology, the application of air conditioners is becoming more and more extensive, and the performance requirements of users for air conditioners are also getting higher and higher. At present, during the cooling operation of the air conditioner, there is no restriction on the outlet air temperature, and the air outlet temperature of the air conditioner is likely to be too low, which affects the comfort of indoor users.

Contents of the invention

The main purpose of the present application is to provide an air conditioner control method, an air conditioner and a computer-readable storage medium, aiming at preventing the air outlet temperature from being too low during the cooling process of the air conditioner and improving indoor user comfort.

In order to achieve the above object, the present application provides a control method of an air conditioner, the control method of the air conditioner includes the following steps:

When the air conditioner is in cooling operation, the temperature of the indoor heat exchanger of the air conditioner is obtained, and the working condition parameter of the air conditioner is obtained; the working condition parameter represents the current operating condition of the air conditioner;

determining a frequency parameter according to the temperature of the indoor heat exchanger and the working condition parameter;

The operation of the compressor is controlled according to the frequency parameter so that the outlet air temperature of the air conditioner is greater than a target temperature.

In one embodiment, the step of determining the frequency parameter according to the temperature of the indoor heat exchanger and the working condition parameter includes:

determining the target frequency required by the current operating condition of the air conditioner according to the operating condition parameters;

Correcting the target frequency according to the temperature of the indoor heat exchanger to obtain the frequency parameter.

In one embodiment, the working condition parameters include the indoor fan speed and ambient temperature of the air conditioner, and the step of determining the target frequency required by the current operating condition of the air conditioner according to the working condition parameters includes:

The target frequency is determined according to the rotational speed of the indoor fan and the ambient temperature.

In one embodiment, the ambient temperature includes an indoor ambient temperature and an outdoor ambient temperature, and the step of determining the target frequency according to the indoor fan speed and the ambient temperature includes:

The first frequency is determined according to the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined according to the indoor fan speed and the ambient temperature;

The target frequency is determined according to the first frequency and the second frequency.

In one embodiment, the step of determining the second frequency according to the speed of the indoor fan and the ambient temperature includes:

determining a frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature, and determining a frequency correction value according to the indoor fan speed;

Correcting the frequency limit value according to the frequency correction value to obtain the second frequency.

In one embodiment, the step of determining the frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature includes:

Determining the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature as the frequency limit value;

Or, the step of determining the frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature includes:

Obtain an initial frequency limit value according to the indoor fan speed, and determine a frequency compensation value according to the indoor ambient temperature and the outdoor ambient temperature;

Correcting the initial frequency limit value according to the frequency compensation value to obtain the frequency limit value.

In one embodiment, the step of correcting the target frequency according to the temperature of the indoor heat exchanger and obtaining the frequency parameter includes:

When the temperature of the indoor heat exchanger is greater than a first preset temperature value, increasing the target frequency to obtain the frequency parameter;

When the temperature of the indoor heat exchanger is less than or equal to a second preset temperature value, reducing the target frequency to obtain the frequency parameter;

Wherein, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value are determined according to the target temperature.

In an embodiment, the step of increasing the target frequency to obtain the frequency parameter includes:

increasing the target frequency according to a first frequency adjustment rate to obtain the frequency parameter; the first frequency adjustment rate shows an increasing trend as the temperature of the indoor heat exchanger increases;

And/or, the step of reducing the target frequency to obtain the frequency parameter includes:

The target frequency is decreased according to a second frequency adjustment rate to obtain the frequency parameter, and the second frequency adjustment rate has an increasing trend as the temperature of the indoor heat exchanger decreases.

In one embodiment, the target frequency includes a first frequency and/or a second frequency, the first frequency is determined according to the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined according to the outdoor ambient temperature Determine with the indoor fan speed of the air conditioner;

The step of increasing the target frequency to obtain the frequency parameter includes:

increasing the second frequency to obtain the frequency parameter;

And/or, the step of reducing the target frequency to obtain the frequency parameter includes:

reducing the characteristic frequency to obtain the frequency parameter; the characteristic frequency is the minimum value among the first frequency and the second frequency.

In one embodiment, after the step of determining the frequency parameter according to the temperature of the indoor heat exchanger and the operating condition parameter, it further includes:

Obtain the protection frequency under the current operating condition of the air conditioner; the protection frequency is the highest frequency allowed to operate the compressor with the goal of protecting the air conditioner;

If the protection frequency is less than the frequency parameter, then control the operation of the compressor according to the protection frequency;

If the protection frequency is greater than the frequency parameter, the step of controlling the operation of the compressor according to the frequency parameter to make the outlet air temperature of the air conditioner greater than the target temperature is executed.

In one embodiment, the frequency parameter is the maximum frequency value allowed to run by the compressor, and the step of controlling the operation of the compressor according to the frequency parameter includes:

The compressor is controlled to operate at a frequency less than or equal to the maximum frequency value.

In one embodiment, the step of controlling the compressor to operate at a frequency less than or equal to the maximum frequency value includes:

Obtain the indoor fan speed of the air conditioner;

determining the target indoor heat exchanger temperature of the air conditioner according to the indoor fan speed;

In a frequency range less than or equal to the maximum frequency value, determine the operating frequency of the compressor according to the target indoor heat exchanger temperature;

The compressor is controlled to operate at the operating frequency.

In one embodiment, the step of determining the target indoor heat exchanger temperature of the air conditioner according to the indoor fan speed includes:

The target indoor heat exchanger temperature is determined according to the speed range where the speed of the indoor fan is located, and the target indoor heat exchanger temperature shows an increasing trend as the speed in the speed range increases.

In an embodiment, after the step of controlling the operation of the compressor according to the frequency parameter, it further includes:

In the process of controlling the operation of the compressor according to the frequency parameter, controlling the indoor fan of the air conditioner to run at a speed greater than or equal to a target speed;

Wherein, the target rotation speed is greater than the minimum rotation speed allowed to operate of the air conditioner in the preset cooling mode, and the outlet air temperature of the air conditioner in the preset cooling mode is lower than the target temperature.

In addition, in order to achieve the above object, the present application also proposes an air conditioner, which includes:

compressor;

A control device, the compressor is connected to the control device, the control device includes: a memory, a processor, and a control program of the air conditioner stored in the memory and operable on the processor, the air conditioner When the control program of the air conditioner is executed by the processor, the steps of the control method for the air conditioner described in any one of the above items are implemented.

In addition, in order to achieve the above object, the present application also proposes a computer-readable storage medium, on which a control program of an air conditioner is stored, and when the control program of the air conditioner is executed by a processor, the above-mentioned A step of the air conditioner control method described in one item.

This application proposes a control method for an air conditioner. When the air conditioner is in cooling operation, the method controls the operating frequency of the compressor in combination with the temperature of the indoor heat exchanger and the current operating condition of the air conditioner, so as to ensure the cooling performance of the compressor. The capacity can match the actual heat transfer conditions of the indoor heat exchanger and the actual operating conditions of the air conditioner, avoiding excessive cooling capacity of the compressor, effectively preventing the air temperature from being too low during the cooling process of the air conditioner, and improving the comfort of indoor users.

Description of drawings

Fig. 1 is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present application;

Fig. 2 is a schematic flow chart of an embodiment of the control method of the air conditioner of the present application;

Fig. 3 is a schematic flow chart of another embodiment of the control method of the air conditioner of the present application;

Fig. 4 is a schematic diagram of the refinement process of step S21 in Fig. 3

Fig. 5 is a schematic flowchart of another embodiment of the control method of the air conditioner of the present application.

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

The main solution of the embodiment of the present application is: when the air conditioner is in cooling operation, obtain the temperature of the indoor heat exchanger of the air conditioner and the working condition parameters of the air conditioner; the working condition parameters represent the temperature of the air conditioner The current operating condition of the air conditioner; determine the frequency parameter according to the temperature of the indoor heat exchanger and the operating condition parameter; control the operation of the compressor according to the frequency parameter so that the outlet air temperature of the air conditioner is greater than the target temperature.

In the prior art, during the cooling operation of the air conditioner, there is no restriction on the air outlet temperature, and the air outlet temperature of the air conditioner is likely to be too low, which affects the comfort of indoor users.

The present application provides the above-mentioned solution, aiming at preventing the outlet air temperature from being too low during the cooling process of the air conditioner and improving the comfort of indoor users.

An embodiment of the present application provides an air conditioner. The air conditioner may be a wall-mounted air conditioner, a cabinet air conditioner, a mobile air conditioner, a window air conditioner, and/or a ceiling-mounted air conditioner.

In this embodiment, referring to FIG. 1 , the air conditioner includes a compressor 1 , an indoor fan 2 and a control device. Both the compressor 1 and the indoor fan 2 are connected to the control device, and the control device can be used to control the operation of the compressor 1 and the indoor fan 2 .

Specifically, the air conditioner also includes a casing and an indoor heat exchanger. The housing is provided with an air outlet, and the housing is provided with an air duct connected to the air outlet. The indoor fan 2 and the indoor heat exchanger are both located in the air duct. Driven by the indoor fan 2, the indoor air enters the air duct and passes through the indoor heat exchanger. The heat exchanger performs heat exchange, and the air after heat exchange is sent into the indoor environment from the air outlet.

Further, the air conditioner includes a refrigerant circulation system, and the refrigerant circulation system includes the above-mentioned compressor 1 , the first heat exchanger, the throttling device and the second heat exchanger connected in sequence. Among the first heat exchanger and the second heat exchanger, the indoor heat exchanger is defined as the indoor heat exchanger, and the outdoor heat exchanger is defined as the outdoor heat exchanger. During cooling operation, the indoor heat exchanger is in an evaporating state to absorb heat from the indoor air.

Further, the air conditioner may also include a temperature detection module 3 for detecting the ambient temperature. The temperature detection module 3 is connected with the control device, and the control device can obtain the data detected by the temperature detection module 3 . The specific temperature detection module 3 may include a first temperature sensor and/or a second temperature sensor. The first temperature sensor can be set in the indoor environment (such as the return air outlet of the air conditioner) to detect the indoor ambient temperature; the second temperature sensor can be set in the outdoor environment (such as the outdoor unit casing or the fresh air inlet) to detect the outdoor ambient temperature.

Further, the air conditioner may also include a temperature sensing package 4 for detecting the temperature of the indoor heat exchanger. The temperature-sensing package 4 can be connected with the control device, and the control device can obtain the data detected by the temperature-sensing package 4 . In this embodiment, the temperature-sensing package 4 is arranged on the coil of the indoor heat exchanger. In other embodiments, the temperature sensing package 4 can also be arranged on the inner wall of the air duct close to the indoor heat exchanger.

In the embodiment of the present application, referring to FIG. 1 , the control device of the air conditioner includes: a processor 1001 (such as a CPU), a memory 1002 and the like. The memory 1002 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1002 may also be a storage device independent of the foregoing processor 1001 .

Those skilled in the art can understand that the device structure shown in FIG. 1 does not constitute a limitation to the device, and may include more or less components than shown in the figure, or combine some components, or arrange different components.

As shown in FIG. 1 , the memory 1002 as a computer-readable storage medium may include a control program of the air conditioner. In the device shown in FIG. 1 , the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the related steps of the control method of the air conditioner in the following embodiments.

The embodiment of the present application also provides a method for controlling an air conditioner, which is applied to control the above air conditioner.

Referring to FIG. 2 , an embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, the control method of the air conditioner includes:

Step S10, when the air conditioner is in cooling operation, acquire the temperature of the indoor heat exchanger of the air conditioner and the operating condition parameters of the air conditioner; the operating condition parameters represent the current operating conditions of the air conditioner;

Specifically, the temperature of the indoor heat exchanger can be detected by a temperature sensing package arranged in the indoor heat exchanger.

The working condition parameters may specifically include the environmental parameters of the working environment of the air conditioner (such as ambient temperature and/or ambient humidity, etc.) and/or the current operating parameters of each refrigeration-related component in the air conditioner (such as the speed of the indoor fan and/or the speed of the outdoor fan, etc. ).

It should be noted that the order in which the working condition parameters and the temperature of the indoor heat exchanger are obtained is not specifically limited, and can be obtained successively or simultaneously according to actual needs. Specifically, the working condition parameters can be obtained first and then the temperature of the indoor heat exchanger. It is also possible to first obtain the temperature of the indoor heat exchanger and then obtain the working condition parameters.

Step S20, determining a frequency parameter according to the indoor heat exchanger temperature and the working condition parameter;

The frequency parameter here is specifically a parameter used to control the frequency of the compressor. The frequency parameter may be a frequency value required by the compressor to run, or a frequency limit value (such as a maximum frequency value and/or a minimum frequency value) during the operation of the compressor. In this embodiment, the frequency parameter is the maximum frequency value that the compressor is allowed to run.

Different indoor heat exchanger temperatures and different working condition parameters correspond to different frequency parameters. The corresponding relationship between the temperature of the indoor heat exchanger, the operating condition parameter and the frequency parameter can be preset, and the corresponding relationship can include calculation formulas and/or mapping relationships and the like. For example, the frequency parameters here can be calculated by substituting the indoor heat exchanger temperature and working condition parameters into the preset formula; the frequency parameters here can also be obtained by looking up table matching between the indoor heat exchanger temperature and working condition parameters; it can also be based on After the initial frequency is determined by the working condition parameters, the result of correcting the initial frequency by the temperature of the indoor heat exchanger is used as the frequency parameter here, and so on.

Step S30, controlling the operation of the compressor according to the frequency parameter so that the outlet air temperature of the air conditioner is greater than the target temperature.

When the frequency parameter is the frequency value required by the compressor to run, the compressor can be controlled to run with the frequency parameter.

When the frequency parameter is the frequency limit value of the compressor, the operating frequency of the compressor can be adjusted according to the actual coil temperature of the indoor heat exchanger, and its operating frequency will not exceed the frequency limit value during the adjustment process. For example, when the frequency limit value includes the minimum frequency, the minimum running frequency of the compressor cannot be lower than the minimum frequency; when the frequency limit value includes the maximum frequency, the maximum running frequency of the compressor cannot be higher than the maximum frequency.

The target temperature is specifically a value of the outlet air temperature that makes the user comfortable and does not feel cold. The target temperature may be a preset fixed temperature value, a parameter determined based on the actual operating condition of the air conditioner, or a temperature determined based on a setting parameter input by a user. For example, the target temperature here can be determined according to the outdoor ambient temperature or the indoor ambient temperature when cooling operation is started. In this embodiment, the value range of the target temperature is [18°C, 23°C], such as 20°C. Specifically, the target temperature is greater than or equal to the set temperature of the air conditioner (that is, the preset target value that the indoor ambient temperature needs to achieve during the cooling operation of the air conditioner).

An air conditioner control method proposed in the embodiment of the present application. When the air conditioner is in cooling operation, the method controls the operating frequency of the compressor in combination with the temperature of the indoor heat exchanger and the current operating condition of the air conditioner, so as to ensure that the compressor The cooling capacity can be matched with the actual heat transfer conditions of the indoor heat exchanger and the actual operating conditions of the air conditioner, avoiding excessive cooling capacity of the compressor, effectively preventing the air temperature from being too low during the cooling process of the air conditioner, and improving indoor user comfort sex.

Further, another embodiment of the air conditioner control method of the present application is proposed based on the above embodiments. In this embodiment, referring to FIG. 3, step S20 includes:

Step S21, determining the target frequency required by the current operating condition of the air conditioner according to the operating condition parameters;

The target frequency may be a frequency value required to run by the compressor, or may be a frequency limit value of the compressor.

The target frequencies corresponding to different working condition parameters have different values. The corresponding relationship between the working condition parameters and the target frequency can be preset, and can be in the form of calculation relationship, mapping relationship, etc.

The operating condition parameter may include one or more than one. When there are more than one operating condition parameters, the target frequency here can be calculated by integrating more than one operating condition parameters; different frequency values can also be determined based on different operating condition parameters, and the obtained more than one frequency values can be compared to obtain The target frequency can also be obtained by weighted average calculation of more than one frequency value to obtain the target frequency here; or, the currently obtained working condition parameters can also be queried in the preset mapping table of working condition parameters and frequencies, and the matching table can be obtained The result of is used as the target frequency here.

Step S22, correcting the target frequency according to the temperature of the indoor heat exchanger to obtain the frequency parameter.

Specifically, the correction parameters of the target frequency (such as correction method, correction value or correction direction, etc.) can be determined according to the temperature of the indoor heat exchanger, and the frequency parameter can be obtained by correcting the target frequency based on the determined correction parameters.

In this embodiment, the target frequency of the compressor is first determined based on the requirements of the current operating conditions of the air conditioner, and then the target frequency is corrected based on the temperature of the indoor heat exchanger to obtain the frequency parameters, so as to realize the adjustment of the compressor frequency based on the actual heat exchange conditions in the room. The cooling capacity of the air conditioner is restricted to ensure that the cooling capacity is not too large, so that the temperature of the air outlet of the air conditioner can be above the target temperature.

Further, after the target frequency is determined, the air conditioner can be controlled to run according to the target frequency. When the operation reaches the preset time or the indoor ambient temperature reaches the preset temperature, the target frequency can be corrected according to the temperature of the indoor heat exchanger to obtain the frequency parameter to control The compressor is running.

Further, in this embodiment, the working condition parameters include the indoor fan speed and ambient temperature of the air conditioner, where the ambient temperature may include indoor ambient temperature and/or outdoor ambient temperature, which can be obtained by obtaining the temperature detection module of the air conditioner The detection data are obtained. Based on this, step S21 includes: determining the target frequency according to the rotational speed of the indoor fan and the ambient temperature.

Different indoor fan speeds and different ambient temperatures correspond to different target frequencies. Specifically, the target frequency can be calculated by substituting the speed of the indoor fan and the ambient temperature into a preset formula; the target frequency can also be obtained by querying a preset mapping table and matching the speed of the indoor fan and the ambient temperature.

Specifically, in this embodiment, the ambient temperature includes the indoor ambient temperature and the outdoor ambient temperature. Referring to FIG. 4 , the process of determining the target frequency by the ambient temperature and the indoor fan speed is specifically as follows (that is, step S21 includes the following steps):

Step S211, determining the first frequency according to the indoor ambient temperature and the set temperature of the air conditioner, and determining the second frequency according to the ambient temperature and the speed of the indoor fan;

The set temperature is specifically the target temperature value that the indoor ambient temperature needs to reach during the cooling operation of the air conditioner.

The second frequency is specifically the operating frequency of the compressor used to make the outlet air temperature of the air conditioner greater than a preset temperature, where the preset temperature is less than or equal to the above-mentioned target temperature.

Different indoor ambient temperatures and different set temperatures correspond to different first frequencies. Specifically, the first frequency may be determined according to the temperature difference between the indoor ambient temperature and the set temperature. The larger the temperature difference is, the higher the first frequency is. Conversely, the smaller the temperature difference is, the smaller the first frequency is.

Different ambient temperatures (indoor ambient temperature and/or outdoor ambient temperature) and different indoor fan speeds correspond to different second frequencies. The second frequency tends to increase as the ambient temperature increases, and the second frequency tends to increase as the rotational speed of the indoor fan increases. Conversely, the second frequency decreases with the decrease of the ambient temperature, and the second frequency decreases with the decrease of the rotation speed of the indoor fan. In this embodiment, the second frequency here is obtained through calculation based on the ambient temperature and the rotational speed of the indoor fan. In other embodiments, the second frequency here may also be obtained by querying a preset mapping relationship through the ambient temperature and the rotational speed of the indoor fan.

Step S212, determining the target frequency according to the first frequency and the second frequency.

Specifically, one of the first frequency and the second frequency can be selected as the target frequency, or the weighted average result of the first frequency and the second frequency can be used as the target frequency, or even the first frequency and the second frequency can be both As the target frequency, one of the first frequency and the second frequency is subsequently selected based on the temperature of the indoor heat exchanger to determine a frequency parameter.

In this embodiment, the target frequency for the operation of the compressor required by the current working condition is determined by the first frequency determined by the indoor ambient temperature and the set temperature, and the second frequency determined by the ambient temperature and the indoor fan speed. Specifically, the first The first frequency can represent the heat exchange demand of the indoor environment, and the second frequency can represent the frequency demand of the compressor when the outlet air temperature is maintained at a relatively high temperature. Based on this, the target frequency determined by combining the first frequency and the second frequency, It can meet the indoor heat exchange requirements while ensuring that the air outlet temperature of the air conditioner will not be too low, ensuring the comfort of indoor users.

Further, in this embodiment, the process of determining the second frequency in combination with the speed of the indoor fan and the ambient temperature is specifically as follows: the frequency limit value of the air conditioner is determined according to the outdoor ambient temperature and/or the indoor ambient temperature, and according to The rotational speed of the indoor fan determines a frequency correction value; the frequency limit value is corrected according to the frequency correction value to obtain the second frequency.

The frequency limit value here includes a maximum frequency value and/or a minimum frequency value that the compressor is allowed to run. The frequency limit values corresponding to different outdoor ambient temperatures and/or different indoor ambient temperatures have different values. Different indoor fan speeds correspond to different frequency correction values. Specifically, the frequency correction value may show an increasing trend as the rotational speed of the indoor fan increases.

Specifically, the product, difference or ratio of the frequency limit value and the frequency correction value may be used as the second frequency. The second frequency can also be obtained after calculating the product, difference or ratio of the frequency limit value and the frequency correction value, and further correcting the result by preset parameters.

Specifically, the determined second frequency is a maximum frequency and/or a minimum frequency used to limit the operation of the compressor.

For example, the second frequency can be specifically calculated by the following formula:

Wherein, X _NOW is a wind speed grade, which can be expressed as a percentage of the current indoor fan speed relative to the rated maximum speed of the indoor fan.

Indicates the above-mentioned frequency correction value. _{Fre_max} and _{Fre_mim} are frequency limit values here. Among them, _{Fre_max} is the maximum frequency allowed by the compressor in the frequency limit value. _{Fre_min} is the minimum frequency that the compressor is allowed to run in the frequency limit value, which can be preset to 20Hz or other values, and can also be obtained according to the speed of the indoor fan. Based on this, after the indoor fan speed and the frequency limit value corresponding to the ambient temperature are known, the indoor fan speed and frequency limit value can be substituted into the above formula, and the calculation result after correcting the frequency limit value based on the indoor fan speed is taken as the first Second frequency.

In this embodiment, the determination of the second frequency by the above method can ensure that the determined second frequency can match the ambient temperature and ensure the reliable operation of the air conditioner. On the basis of ensuring the reliable operation of the air conditioner, it is adapted to limit the speed of the indoor fan, so as to effectively avoid the current speed of the fan. The frequency of the lower compressor is too high, so that the cooling capacity of the air conditioner can be limited according to the speed of the fan, so as to ensure that the operation of the compressor and the indoor fan cooperates to ensure that the air temperature of the air conditioner will not be too low, so as to ensure that the indoor users will not be too low during the cooling process. comfort.

Specifically, in an embodiment, a maximum frequency allowed to run of the compressor corresponding to the outdoor ambient temperature is determined as the frequency limit value. Different outdoor ambient temperatures correspond to different maximum frequencies. The maximum frequency here increases with the increase of the outdoor ambient temperature. In this embodiment, the temperature range where the outdoor ambient temperature is located is determined, and the frequency corresponding to the determined temperature range is used as the maximum frequency here. For example, when T4>40°C, the above _{Fre_max} can be 50HZ (the specific value can be set according to the air conditioner type and other factors); when T4≤40°C, the above _{Fre_max} can be 40HZ (the specific value can be set according to the air conditioner type, etc. Factor requirement setting), it should be noted that, in other embodiments, 40°C here can also be set as thresholds of other values, such as 35°C, 38°C, and so on. In other embodiments, the maximum frequency here may also be directly calculated from the outdoor ambient temperature.

In this embodiment, based on this, it can be ensured that the compressor operates reliably and the outlet air temperature will not be too low, thereby ensuring user comfort.

In addition, in another embodiment, an initial frequency limit value is obtained according to the indoor fan speed, a frequency compensation value is determined according to the indoor ambient temperature and the outdoor ambient temperature; and the initial frequency limit is corrected according to the frequency compensation value value to obtain the frequency limit value. The initial frequency limit values corresponding to different indoor fan speeds have different values. The larger the indoor fan speed, the larger the initial frequency limit value, and the smaller the indoor fan speed, the smaller the initial frequency limit value. In this embodiment, the initial frequency limit value specifically includes an initial minimum frequency and an initial maximum frequency corresponding to the rotational speed of the indoor fan. Based on this, the initial minimum frequency and the initial maximum frequency can be corrected based on the indoor ambient temperature and the outdoor ambient temperature, respectively, and the corrected minimum frequency and maximum frequency are used as frequency limit values.

Specifically, the frequency limit value can be calculated by the following formula:

_{Fre_max} = Fre_Warmwindmax+a_Warmwind*(T4-35)+

b_Warmwind*(T1-27)——(2)

_{Fre_min} = Fre_Warmwindmin+a_Warmwind*(T4-35)+b_Warmwind*(T1-27)——(3);

Wherein, T1 is the indoor environment temperature, T4 is the outdoor environment temperature, a_Warmwind is the correction coefficient corresponding to the outdoor environment (a known constant), b_Warmwind is the correction coefficient corresponding to the indoor environment (a known constant), in this embodiment , a_Warmwind is greater than b_Warmwind, specifically 1.2 and 1.0 respectively. In other embodiments, it can also be set to other values according to actual needs. Fre_ _max is the maximum frequency value that the compressor is allowed to run in the frequency limit value, and Fre_ _min is the minimum frequency value that the compressor is allowed to run in the frequency limit value. Fre_Warmwindmin and Fre_Warmwindmax are the minimum and maximum values of the compressor operating frequency allowed by the current speed of the fan when the outlet air temperature is greater than the target temperature. In this embodiment, Fre_Warmwindmin and Fre_Warmwindmax are 20Hz and 35Hz respectively, and can also be set in other embodiments for other values.

After _{Fre_max} and _{Fre_min} are obtained here, they can be substituted into the above-mentioned formula (1) to calculate the second frequency.

Here, on the basis of the frequency limit value determined by the indoor and outdoor temperature, the second frequency is obtained after adjusting the speed of the indoor fan, which can ensure the reliable operation of the air conditioner and the comfortable indoor temperature, avoid the temperature of the air outlet from being too low, and ensure that the air conditioner The comfortable air temperature can meet the comfort needs of users.

Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of the present application is proposed. In this embodiment, referring to FIG. 5, step S22 includes:

Step S221, when the temperature of the indoor heat exchanger is greater than a first preset temperature value, increase the target frequency to obtain the frequency parameter;

Step S222, when the temperature of the indoor heat exchanger is less than or equal to a second preset temperature value, reduce the target frequency to obtain the frequency parameter;

Wherein, the second preset temperature value is less than or equal to the first preset temperature value, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value is determined according to the target temperature.

Specifically, the frequency parameter can be obtained after reducing or increasing the target frequency according to the preset fixed frequency adjustment parameter, or the corresponding frequency adjustment parameter can be determined according to the temperature of the indoor heat exchanger to reduce or increase the target frequency Get the frequency parameter.

In this embodiment, when the temperature of the indoor heat exchanger is high, the frequency parameter obtained by increasing the target frequency is used to control the operation of the compressor, so that the compressor can operate at a higher frequency to ensure the cooling efficiency of the air conditioner to meet the needs of indoor users. When the temperature of the indoor heat exchanger is low, the frequency parameter obtained by reducing the target frequency is used to control the operation of the compressor, so that the compressor can operate at a lower frequency to ensure that the air temperature of the air conditioner will not be too low. Specifically, adjusting the target frequency based on the temperature of the indoor heat exchanger in the above manner is used as a frequency parameter for controlling the compressor, so as to ensure that the temperature of the indoor heat exchanger can be maintained between the first preset temperature value and the second preset temperature value. To ensure that the outlet air temperature of the air conditioner can reach above the target temperature and the air conditioner has better cooling efficiency.

Specifically, in this embodiment, the step of increasing the target frequency includes: increasing the target frequency according to a first frequency adjustment rate to obtain the frequency parameter; the first frequency adjustment rate increases with the The temperature of the indoor heat exchanger is increasing. Specifically, the target frequency is gradually adjusted according to the first adjustment rate, and the adjusted result is used as a frequency parameter for controlling the operation of the compressor. The higher the temperature of the indoor heat exchanger, the faster the first frequency adjustment rate, which can ensure that when the compressor is controlled according to the frequency parameter, the frequency of the compressor can be effectively increased to ensure the cooling efficiency of the air conditioner.

And/or, the step of reducing the target frequency to obtain the frequency parameter includes:

The target frequency is decreased according to a second frequency adjustment rate to obtain the frequency parameter, and the second frequency adjustment rate has an increasing trend as the temperature of the indoor heat exchanger decreases. Specifically, the target frequency is gradually adjusted according to the second adjustment rate, and the adjusted result is used as a frequency parameter for controlling the operation of the compressor. The lower the temperature of the indoor heat exchanger, the faster the adjustment rate of the second frequency, which can ensure that when the compressor is controlled according to the frequency parameter, the frequency of the compressor can be effectively limited to avoid the air temperature of the air conditioner being too low.

Further, in this embodiment, the target frequency includes a first frequency and/or a second frequency, the first frequency is determined according to the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined according to The outdoor ambient temperature and the indoor fan speed of the air conditioner are determined; the first frequency and the second frequency here are the same concepts as the first frequency and the second frequency mentioned in the above-mentioned embodiment, and the determination process will not be done here repeat. Based on this, the step of increasing the target frequency to obtain the frequency parameter includes: increasing the second frequency to obtain the frequency parameter. And/or, the step of reducing the target frequency to obtain the frequency parameter includes: reducing a characteristic frequency to obtain the frequency parameter; the characteristic frequency is one of the first frequency and the second frequency minimum value.

In this embodiment, when the temperature of the indoor heat exchanger is high, the frequency parameter is obtained after adjustment based on the second frequency, which can ensure that when the frequency parameter after increasing the frequency is used to control the operation of the compressor, the frequency of the compressor will not If it is too high, the outlet air temperature of the air conditioner will not be too low, and the outlet air temperature can reach above the target temperature to ensure user comfort. When the temperature of the indoor heat exchanger is low, the frequency reference is adjusted based on the minimum value of the first frequency and the second frequency, which can ensure that the frequency parameter after reducing the frequency controls the operation of the compressor, and the frequency of the compressor can be quickly Decrease to ensure that the outlet air temperature of the air conditioner is not too low and can be maintained above the target temperature to meet user comfort.

Further, in order to better understand the determination process of the frequency parameter in the air conditioner control method mentioned in this embodiment, a specific application of the solution of this embodiment is provided below:

In this embodiment, the first frequency, the second frequency and the frequency parameter are the highest frequency limit of the air conditioner compressor. On the basis of , according to the T2 temperature (indoor heat exchanger temperature) adjustment and calculation, the frequency parameters for controlling the operation of the compressor are as follows:

When T2>22.5℃, the maximum frequency f2 increases by 2HZ every 60 seconds.

When 22.5≥T2＞21.5℃, the maximum frequency f2 increases by 1HZ every 90 seconds;

When 21.5≥T2＞20.5℃, the maximum frequency f2 increases by 0.5HZ every 90 seconds;

When 20.5≥T2≥19.5℃, the maximum frequency f2 value will not be processed, and the maximum frequency limit will be updated after an interval of 180 seconds;

When 19.5>T2≥18.5°C, the minimum value of f1 and f2 is reduced by 0.5HZ at intervals of 90s;

When 18.5>T2≥17.5°C, the minimum value of f1 and f2 is reduced by 1HZ at intervals of 90s;

When T2<17.5°C, reduce 2HZ at intervals of 60s on the basis of the minimum value of f1 and f2.

Further, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, after the step of determining the frequency parameter according to the temperature of the indoor heat exchanger and the working condition parameter, it further includes: obtaining the protection frequency under the current operating condition of the air conditioner; the protection frequency is the highest frequency allowed to operate the compressor with the goal of protecting the air conditioner; if the protection frequency is less than the frequency parameter, then control the operation of the compressor according to the protection frequency; if the protection frequency is greater than The frequency parameter, then execute the step of controlling the operation of the compressor according to the frequency parameter so that the outlet air temperature of the air conditioner is greater than the target temperature. Here, on the basis that the determined frequency parameter can make the outlet air temperature greater than the target temperature, before controlling the operation of the compressor according to the determined frequency parameter, it is first compared with the protection frequency of the air conditioner, and the smaller frequency in the comparison result is controlled The compressor is running, so as to ensure that the outlet air temperature will not be too low to meet user comfort and protect the reliable operation of the air conditioning system.

Further, based on any of the above-mentioned embodiments, another embodiment of the control method of the air conditioner of the present application is proposed. In this embodiment, the frequency parameter is the maximum frequency value that the compressor is allowed to operate, and the The step of controlling the operation of the compressor by the frequency parameter includes: controlling the compressor to operate at a frequency less than or equal to the maximum frequency value. Based on this, the operating frequency of the air conditioner can be limited from being too high, so as to ensure that the temperature of the air outlet of the air conditioner will not be high or low, and can reach above the target temperature to satisfy the user's comfort.

Specifically, within a frequency range less than or equal to the maximum frequency value, the compressor can run at a fixed frequency or at a variable frequency.

Specifically, in this embodiment, the indoor fan speed of the air conditioner is obtained; the target indoor heat exchanger temperature of the air conditioner is determined according to the indoor fan speed; in the frequency range less than or equal to the maximum frequency value Within, the operating frequency of the compressor is determined according to the target indoor heat exchanger temperature; and the compressor is controlled to operate at the operating frequency.

The target indoor heat exchanger temperature is specifically the target temperature that the indoor heat exchanger needs to reach during cooling operation. The target indoor heat exchanger temperature may be a preset fixed parameter, or a parameter determined according to the actual operating state of the air conditioner (for example, according to the indoor fan speed and/or the current indoor ambient temperature, etc.). Specifically, the frequency adjustment parameters of the compressor (such as frequency adjustment direction (such as increasing frequency or decreasing frequency, etc.), frequency adjustment range or frequency adjustment rate, etc.), control the compressor adjustment frequency according to the determined frequency adjustment parameters, so that the time temperature of the indoor heat exchanger can reach the target indoor heat exchanger temperature.

Specifically, the higher the speed of the indoor fan, the higher the target indoor heat exchanger temperature. The target indoor heat exchanger temperature can be obtained by calculating the speed of the indoor fan, or can be obtained by matching the speed of the indoor fan through table lookup.

Specifically, in this embodiment, the target indoor heat exchanger temperature is determined according to the speed range in which the speed of the indoor fan is located, and the target indoor heat exchanger temperature increases as the speed in the speed range increases. trend.

In this embodiment, T2 is defined as the preset indoor heat exchanger temperature, and the corresponding relationship between different indoor fan speeds and the target indoor heat exchanger temperature can be shown in the following table:

In this embodiment, the target indoor heat exchanger temperature is determined based on the speed of the indoor fan to control the operation of the compressor, so as to achieve precise control of the frequency of the compressor and ensure that the compressor and the fan cooperate to achieve accurate air outlet temperature of the air conditioner. Reach above the target temperature to ensure the satisfaction of user comfort.

Further, based on any of the above embodiments, in this embodiment, after the step of controlling the operation of the compressor according to the frequency parameter, it further includes: after the process of controlling the operation of the compressor according to the frequency parameter , controlling the indoor fan of the air conditioner to run at a speed greater than or equal to the target speed; wherein, the target speed is greater than the minimum speed allowed to run by the air conditioner in the preset cooling mode, and in the preset cooling mode The outlet air temperature of the air conditioner is lower than the target temperature.

For example, the minimum rotation speed in the preset cooling mode is 5%N, and the minimum rotation speed of the indoor fan is 20%N in the error of controlling the operation of the compressor according to the frequency parameter. Based on this, it can be ensured that the rotational speed of the indoor fan will not be too low to cause the outlet air temperature to be too low, and further ensure that the outlet air temperature of the air conditioner can reach above the target temperature to satisfy user comfort.

Among them, within the speed range greater than or equal to the target speed, if there is a set speed corresponding to the user input command, the indoor fan is controlled to run according to the set speed; if there is no set speed corresponding to the user input command, it can be controlled according to the indoor environment. The rotational speed determined by the temperature difference between the temperature and the set temperature controls the operation of the indoor fan. In order to ensure that the air outlet of the air conditioner can meet the comfort of the user.

In addition, the embodiment of the present application also proposes a computer-readable storage medium, the computer-readable storage medium stores the control program of the air conditioner, and when the control program of the air conditioner is executed by the processor, the above control of the air conditioner is realized. The relevant steps of any embodiment of the method.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present application are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium as described above (such as ROM/RAM , magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the methods described in various embodiments of the present application.

The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structures or equivalent process transformations made by using the description of the application and the accompanying drawings are directly or indirectly used in other related technical fields. , are all included in the patent protection scope of the present application in the same way.

Claims (16)

1. A method for controlling an air conditioner, wherein the method for controlling an air conditioner includes the following steps:

   When the air conditioner is in cooling operation, the temperature of the indoor heat exchanger of the air conditioner is obtained, and the working condition parameter of the air conditioner is obtained; the working condition parameter represents the current operating condition of the air conditioner;

   determining a frequency parameter according to the temperature of the indoor heat exchanger and the working condition parameter;

   The operation of the compressor is controlled according to the frequency parameter so that the outlet air temperature of the air conditioner is greater than a target temperature.
2. The control method of an air conditioner according to claim 1, wherein the step of determining the frequency parameter according to the temperature of the indoor heat exchanger and the operating condition parameter comprises:

   determining the target frequency required by the current operating condition of the air conditioner according to the operating condition parameters;

   Correcting the target frequency according to the temperature of the indoor heat exchanger to obtain the frequency parameter.
3. The control method of the air conditioner according to claim 2, wherein the operating condition parameters include the indoor fan speed and the ambient temperature of the air conditioner, and determining the current operating condition of the air conditioner according to the operating condition parameters The steps to target frequency of demand include:

   The target frequency is determined according to the rotational speed of the indoor fan and the ambient temperature.
4. The control method of an air conditioner according to claim 3, wherein the ambient temperature includes an indoor ambient temperature and an outdoor ambient temperature, and the step of determining the target frequency according to the indoor fan speed and the ambient temperature includes:

   The first frequency is determined according to the indoor ambient temperature and the set temperature of the air conditioner, and the second frequency is determined according to the indoor fan speed and the ambient temperature;

   The target frequency is determined according to the first frequency and the second frequency.
5. The control method of an air conditioner according to claim 4, wherein the step of determining the second frequency according to the indoor fan speed and the ambient temperature comprises:

   determining a frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature, and determining a frequency correction value according to the indoor fan speed;

   Correcting the frequency limit value according to the frequency correction value to obtain the second frequency.
6. The control method of an air conditioner according to claim 4, wherein the step of determining the frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature comprises:

   Determining the maximum allowable operating frequency of the compressor corresponding to the outdoor ambient temperature as the frequency limit value;

   Or, the step of determining the frequency limit value of the air conditioner according to the outdoor ambient temperature and/or the indoor ambient temperature includes:

   Obtain an initial frequency limit value according to the indoor fan speed, and determine a frequency compensation value according to the indoor ambient temperature and the outdoor ambient temperature;

   Correcting the initial frequency limit value according to the frequency compensation value to obtain the frequency limit value.
7. The control method of an air conditioner according to claim 2, wherein the step of correcting the target frequency according to the temperature of the indoor heat exchanger and obtaining the frequency parameter comprises:

   When the temperature of the indoor heat exchanger is greater than a first preset temperature value, increasing the target frequency to obtain the frequency parameter;

   When the temperature of the indoor heat exchanger is less than or equal to a second preset temperature value, reducing the target frequency to obtain the frequency parameter;

   Wherein, the second preset temperature value is less than or equal to the first preset temperature value, and the first preset temperature value and the second preset temperature value are determined according to the target temperature.
8. The control method of an air conditioner according to claim 7, wherein said step of increasing said target frequency to obtain said frequency parameter comprises:

   increasing the target frequency according to a first frequency adjustment rate to obtain the frequency parameter; the first frequency adjustment rate shows an increasing trend as the temperature of the indoor heat exchanger increases;

   And/or, the step of reducing the target frequency to obtain the frequency parameter includes:

   The target frequency is decreased according to a second frequency adjustment rate to obtain the frequency parameter, and the second frequency adjustment rate has an increasing trend as the temperature of the indoor heat exchanger decreases.
9. The control method of an air conditioner according to claim 7, wherein the target frequency includes a first frequency and/or a second frequency, and the first frequency is determined according to the indoor ambient temperature and the set temperature of the air conditioner, The second frequency is determined according to the outdoor ambient temperature and the speed of the indoor fan of the air conditioner;

   The step of increasing the target frequency to obtain the frequency parameter includes:

   increasing the second frequency to obtain the frequency parameter;

   And/or, the step of reducing the target frequency to obtain the frequency parameter includes:

   reducing the characteristic frequency to obtain the frequency parameter; the characteristic frequency is the minimum value among the first frequency and the second frequency.
10. The control method of an air conditioner according to claim 1, wherein, after the step of determining the frequency parameter according to the temperature of the indoor heat exchanger and the operating condition parameter, further comprising:

    Obtain the protection frequency under the current operating condition of the air conditioner; the protection frequency is the highest frequency allowed to operate the compressor with the goal of protecting the air conditioner;

    The protection frequency is less than the frequency parameter, and the operation of the compressor is controlled according to the protection frequency;

    The protection frequency is greater than the frequency parameter, and the step of controlling the operation of the compressor according to the frequency parameter is performed to make the outlet air temperature of the air conditioner greater than the target temperature.
11. The control method of the air conditioner according to any one of claims 1 to 10, wherein the frequency parameter is the maximum frequency value allowed for the operation of the compressor, and the operation of the compressor is controlled according to the frequency parameter The steps include:

    The compressor is controlled to operate at a frequency less than or equal to the maximum frequency value.
12. The control method of an air conditioner according to claim 11, wherein the step of controlling the compressor to operate at a frequency less than or equal to the maximum frequency value comprises:

    Obtain the indoor fan speed of the air conditioner;

    determining the target indoor heat exchanger temperature of the air conditioner according to the indoor fan speed;

    In a frequency range less than or equal to the maximum frequency value, determine the operating frequency of the compressor according to the target indoor heat exchanger temperature;

    The compressor is controlled to operate at the operating frequency.
13. The control method of the air conditioner according to claim 11, wherein the step of determining the target indoor heat exchanger temperature of the air conditioner according to the speed of the indoor fan comprises:

    The target indoor heat exchanger temperature is determined according to the speed range where the speed of the indoor fan is located, and the target indoor heat exchanger temperature shows an increasing trend as the speed in the speed range increases.
14. The air conditioner control method according to any one of claims 1 to 10, wherein, after the step of controlling the operation of the compressor according to the frequency parameter, further comprising:

    In the process of controlling the operation of the compressor according to the frequency parameter, controlling the indoor fan of the air conditioner to run at a speed greater than or equal to a target speed;

    Wherein, the target rotation speed is greater than the minimum rotation speed allowed to operate of the air conditioner in the preset cooling mode, and the outlet air temperature of the air conditioner in the preset cooling mode is lower than the target temperature.
15. An air conditioner, wherein the air conditioner includes:

    compressor;

    A control device, the compressor is connected to the control device, the control device includes: a memory, a processor, and a control program of the air conditioner stored in the memory and operable on the processor, the air conditioner When the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner according to any one of claims 1 to 14 are realized.
16. A computer-readable storage medium, wherein a control program of an air conditioner is stored on the computer-readable storage medium, and when the control program of the air conditioner is executed by a processor, the implementation of any one of claims 1 to 14 is achieved. The steps of the control method of the air conditioner described above.

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