CN114198877B - Energy-saving control method and device for variable frequency air conditioner, air conditioner and storage medium - Google Patents

Abstract

The invention provides an energy-saving control method, device, air conditioner and storage medium for a variable frequency air conditioner. The control method includes the steps: S1, the air conditioner enters the energy-saving mode; S2, obtains the indoor ambient temperature T _{inner loop} and user settings Temperature T _{is set} , and the temperature difference △T is calculated, where △T = T _{inner ring} -T _setting ; S3, determines the temperature range to which the temperature difference △T belongs, and enters energy-saving mode A, B or according to the temperature range to which the temperature difference △T belongs. C. The energy-saving control method, device, air conditioner and storage medium of the inverter air conditioner of the present invention can dynamically adjust the compressor frequency and external motor speed of the air conditioner according to the indoor heat load or cooling capacity, so as to satisfy the cooling effect and user requirements. While being comfortable, it also has a certain energy-saving effect.

Description

Energy-saving control method, device, air conditioner and storage medium of inverter air conditioner

Technical field

The present invention relates to the technical field of air conditioning, and in particular to an energy-saving control method, device, air conditioner and storage medium for a variable frequency air conditioner.

Background technique

With the improvement of people's living needs and living standards, air conditioners have become an indispensable electrical appliance in people's lives. At present, air conditioners are generally equipped with cooling mode, heating mode, dehumidification mode, ventilation mode, automatic mode, etc. When the air conditioner is in one of the modes, such as cooling mode, the air conditioner will operate according to the user's settings, such as setting Temperature, wind speed, etc. are controlled accordingly.

In addition, some air conditioners are preset with energy-saving functions for users to turn on manually. However, the current energy-saving function of air conditioners is generally achieved by limiting the maximum operating frequency of the compressor and the maximum speed of the internal and external motors. On the one hand, this method is only suitable for scenarios with relatively small heat loads; on the other hand, this method is not beneficial to users. It has a great impact on the comfort of users, and it is impossible to achieve effective energy saving on the premise of ensuring user comfort.

In order to solve the above technical problems, this application is proposed.

Contents of the invention

The present invention designs an energy-saving control method, device, air conditioner and storage medium for a variable frequency air conditioner, so as to achieve effective energy saving under different heat loads of the air conditioner and at the same time improve the problem of reduced comfort caused by energy saving.

In order to solve the above problems, the present invention discloses an energy-saving control method for an inverter air conditioner.

An energy-saving control method for an inverter air conditioner, including the steps:

S1, the air conditioner enters energy-saving mode;

S2, obtain the indoor ambient temperature T _{inner loop} and the user set temperature T _setting , and calculate the temperature difference ΔT, where ΔT = T _{inner loop} - T _setting ;

S3, determine the temperature range to which the temperature difference △T belongs, and enter energy-saving mode A, B or C according to the temperature range to which the temperature difference △T belongs.

The energy-saving control method of the inverter air conditioner described in this application measures the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting , and calculates the temperature difference △ based on the difference between the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting . The size of T is represented by the temperature difference △T to represent the actual required cooling capacity or heat load. Then, according to the size of the temperature difference △T, the air conditioner is controlled to enter different energy-saving modes, such as energy-saving mode A, B or C, and in different In the energy-saving mode, the compressor and external motor of the air conditioner are controlled to operate in different states, achieving phased energy-saving operation according to the heat load or cooling capacity, and dynamically adjusting the energy-saving mode of the air conditioner according to the heat load or cooling capacity. Achieve precise control, effective energy saving and ensure comfort.

Further, the energy-saving control method of the inverter air conditioner is used for energy-saving control during the cooling mode operation of the air conditioner.

Limiting the energy-saving control method of the inverter air conditioner to energy-saving control during the cooling mode operation can make the energy-saving control more accurate and more effective.

Further, in the step S3, the value of the temperature difference ΔT is divided into three temperature intervals through the preset temperature difference thresholds T _{first threshold} and T _{second threshold} , and the order is T _{first threshold} < ΔT. The first temperature interval, the second temperature interval with T _{second threshold value} < ΔT ≤ T _{first threshold value} , and the third temperature interval with ΔT ≤ T _{second threshold value} , when the value of the temperature difference ΔT is within the first temperature interval When the value of the temperature difference △T is within the second temperature range, the air conditioner enters the energy-saving mode B. When the value of the temperature difference △T is within the third temperature range, The air conditioner enters energy-saving mode C operation.

The energy-saving control method of the inverter air conditioner can dynamically adjust the compressor frequency and external motor speed of the air conditioner according to the indoor heat load or cooling capacity. Under high load conditions, the air conditioner can output sufficient cooling capacity without sacrificing cooling. speed, appropriate energy saving; in the medium heat load state, the air conditioner sets the compressor frequency and external motor speed to make the whole system highly energy efficient, energy saving and efficiency increasing; in the low heat load state, the air conditioner dynamically adjusts the compressor frequency and external motor speed. speed, only outputting the minimum cooling capacity, which not only meets the cooling effect and user comfort, but also has a certain energy-saving effect.

Further, in the energy-saving mode A, the compressor of the air conditioner operates at the F _{first energy-saving frequency} , and the external motor operates at the N _{first energy-saving speed} ; in the energy-saving mode B, the compressor of the air conditioner operates at the F first energy-saving _{frequency. Second energy-saving frequency} operation, the external motor runs at N _{second energy-saving speed} ; in the energy-saving mode C, the operating frequency of the air conditioner compressor is between F _{second energy-saving frequency} and F _{third energy-saving frequency} , and the external motor runs at N _{The third energy-saving speed} operation; wherein, the F _{first energy-saving frequency} > F _{second energy-saving frequency} > F _{third energy-saving frequency} ; the N _{first energy-saving speed} , N _{second energy-saving speed} and N _{third energy-saving speed} are equal or N _{The first energy-saving speed} >N _{the second energy-saving speed} >N _{the third energy-saving speed} .

By optimizing and limiting the operating status of the air conditioner compressor and external motor in energy saving modes A, B and C, the energy saving effect and comfort during air conditioning operation can be further ensured and improved.

Further, in the energy-saving mode A, B or C, the rotation speed of the external motor is set according to the temperature of the external coil of the air conditioner T and the size of _{the external disk} : when T _{external disk} > T _{first external disk threshold} , the external motor runs _{Nth Energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ T _{first external disk threshold} , the external motor runs N _{second energy-saving speed} ; when T _{external disk} ≤ _{T second external disk threshold} , the external motor runs N _{third energy-saving speed} ; Wherein, the T _{first external disk threshold} and T _{the second external disk threshold are} preset external disk temperature thresholds, and the N _{first energy-saving speed} , N _{second energy-saving speed} and N _{third energy-saving speed} are equal or N _{first energy-saving speed} &gt; N _{second energy-saving speed} > N _third energy- _{saving speed} .

In energy-saving modes A, B and C, the speed of the external motor is set according to the temperature T of the external _coil of the air conditioner, which ensures the heat dissipation and cooling effect of the external motor on the external coil, making it better compatible with the air conditioner. to match the overall operating status.

Further, in the energy-saving mode A, B or C, the rotation speed of the external motor is set according to the temperature of the external coil of the air conditioner T and the size of _{the external disk} : when T _{external disk} > T _{first external disk threshold} , the external motor runs _{Nth Energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ T _{first external disk threshold} , the external motor keeps the current speed unchanged; when T _{external disk} ≤ _{T second external disk threshold} , the external motor runs N _{second energy-saving speed} ; where , the T _{first external disk threshold} and T _{the second external disk threshold are} preset external disk temperature thresholds, and the N _{first energy-saving rotational speed} > N _{second energy-saving rotational speed} .

When T _{second external disk threshold <} T _{external disk} ≤ T _{first external disk threshold} , the external motor keeps the current speed unchanged, that is, the external motor runs N _{first energy-saving speed} or N _{second energy-saving speed} , which can reduce the external motor speed switching frequency. Improve equipment operation stability while ensuring energy efficiency adaptation.

Further, after the air conditioner enters the energy saving mode A, it detects and determines whether the operating time of the air conditioner in the energy saving mode A is _{greater than the first time period} every set time. If so, it detects the indoor ambient temperature again _within T. _{The ring} and the user set temperature T _{are set} , the temperature difference ΔT is calculated, and it is judged whether the temperature difference ΔT meets _{the first threshold of} ΔT ≤ T. If so, the air conditioner is controlled to enter the energy-saving mode B.

In this application, it is considered that when △T ≤ T _{first threshold} , the indoor ambient temperature T _{inner loop} enters the user's comfort temperature range. At this time, even if the operating frequency of the compressor and the rotation speed of the external motor are further reduced, and the cooling speed is sacrificed, It also has less impact on the user's physical comfort. Therefore, the operating frequency of the compressor and the speed of the external motor can be further reduced to achieve energy saving. That is, in the energy-saving mode A, when the operating time of the air conditioner in the energy-saving mode A > t _{first time period} , and ΔT ≤ T _{first threshold} , the air conditioner can be made to operate according to _{the second energy-saving frequency of} F and N Operation _{at the second energy-saving speed} . Among them, F _{the second energy-saving frequency} and N _{the second energy-saving speed} are values that have been tested many times in the laboratory. At this operating frequency and speed, the air conditioner has the highest energy efficiency, good energy saving, and has certain The cooling effect can meet the user's comfort requirements. At the same time, in general, the frequency reduction speed of the air conditioner is slow during rapid cooling in the cooling mode. The cooling capacity of the air conditioner is higher than the heat load of the room, causing the indoor ambient temperature T _{in the inner loop} to first be lower than the user-set temperature T, and then rebound back _to the user-set temperature T. Near the constant temperature T _setting , and the process of rapid frequency adjustment of the compressor described in this application from _{the first energy-saving frequency} of F to _{the second energy-saving frequency of} F can quickly bring the room heat load and the cooling capacity of the air conditioner close to each other, avoiding the effects of excessive cooling. Reduce unnecessary power consumption and further achieve energy saving effect.

Further, after the air conditioner enters the energy-saving mode B, it detects and determines whether the operating time of the air conditioner in the energy-saving mode B is >t _{second time period} every set time. If so, it detects the indoor ambient temperature again _within T _Ring and user set temperature T _{are set} , calculate the temperature difference △T, and determine the temperature range of the temperature difference △T. If △T>T _{the first threshold,} the air conditioner is controlled to enter the energy-saving mode A; if △T ≤ T _{the first threshold 2 thresholds} , the air conditioner is controlled to enter the energy-saving mode C.

In this application, it is considered that when △T ≤ T _{second threshold} , _{the inner ring of} indoor ambient temperature T is located near the user- _set temperature T, or lower than the user-set temperature, such as _{the second threshold of T is} 1°C or -1 ℃, it can be considered that the indoor ambient temperature T _{inner loop} is moderate, and there is no need to continue cooling. The compressor frequency is automatically adjusted between _{the second energy-saving frequency} F and _{the third energy-saving frequency} F, so that the cooling capacity of the air conditioner can dynamically increase slightly according to the indoor heat load. Adjust so that the indoor ambient temperature T _{inner loop} is basically equal to the user-set temperature T _setting to avoid excessive cooling or rebound of the indoor ambient temperature T _{inner loop} .

Further, after the air conditioner enters the energy-saving mode C, it detects and determines whether the operating time of the air conditioner in the energy-saving mode C is _{greater than the third time period} every set time. If so, it detects the indoor ambient temperature again _within T _{The ring} and the user set temperature T _{are set} , the temperature difference △T is calculated, and the temperature range of the temperature difference △T is judged. If △T>T _{the second threshold,} the air conditioner is controlled to enter the energy-saving mode B; if △T ≤ T _{the second} threshold _{Three thresholds} , the air conditioner is controlled to enter a temperature-reaching shutdown state, where T _{third threshold is} a preset temperature difference threshold, and T _{third threshold} < T _{second threshold} < T _{first threshold} .

In this application, it is considered that when △T ≤ T _{third threshold} , the indoor ambient temperature T _{inner loop} is too low, user comfort is poor, and the air conditioner needs to stop outputting cooling capacity. At this time, the air conditioner is controlled to enter the temperature shutdown state to achieve energy saving and To improve comfort.

Further, after the air conditioner enters the temperature shutdown state, the compressor and external motor of the air conditioner stop running, and the indoor ambient temperature T _{inner ring} and the user _set temperature T are detected again every set time, and the temperature difference △T is calculated. , and determine whether the temperature difference ΔT satisfies _{the second threshold of} ΔT>T. If so, the air conditioner is controlled to enter the energy-saving mode B. If not, the current state is maintained.

When the air conditioner enters the temperature shutdown state for too long, the indoor temperature will gradually rise. In order to avoid the decrease in comfort caused by the rise in indoor temperature, when the temperature difference △T meets _{the second threshold of} △T>T, the air conditioner is controlled to enter the energy saving state. Mode B, cooling again.

An energy-saving control device for a variable frequency air conditioner. The energy-saving control device operates according to the above-mentioned energy-saving control method.

An air conditioner includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and run by the processor, the above-mentioned energy-saving control method is implemented.

A computer-readable storage medium stores a computer program. When the computer program is read and run by a processor, the above-mentioned energy-saving control method is implemented.

The energy-saving control method, device, air conditioner and storage medium of the inverter air conditioner described in this application can dynamically adjust the compressor frequency and external motor speed of the air conditioner according to the indoor heat load or cooling capacity. Under high load conditions, the air conditioner can maintain On the premise of outputting sufficient cooling capacity, the cooling speed is sacrificed to appropriately save energy; under the medium heat load state, the compressor frequency and external motor speed set by the air conditioner make the whole system energy efficient, energy saving and efficiency increasing; under the low heat load state, the air conditioner sets Dynamically adjust the frequency of the compressor and the speed of the external motor to output only the minimum cooling capacity, which not only meets the cooling effect and user comfort, but also has a certain energy-saving effect.

Description of the drawings

Figure 1 is a flow chart of the energy-saving control method of the inverter air conditioner according to the present invention;

Figure 2 shows the corresponding operating parameters of the air conditioner in the energy-saving modes A, B, C and the Darwin shutdown state of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 2, an energy-saving control method for an inverter air conditioner includes steps:

S1, the air conditioner enters energy-saving mode;

S2, obtain the indoor ambient temperature T _{inner loop} and the user set temperature T _setting , and calculate the temperature difference ΔT, where ΔT = T _{inner loop} - T _setting ;

S3, determine the temperature range to which the temperature difference △T belongs, and enter energy-saving mode A, B or C according to the temperature range to which the temperature difference △T belongs.

The energy-saving control method of the inverter air conditioner described in this application measures the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting , and calculates the temperature difference △ based on the difference between the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting . The size of T is represented by the temperature difference △T to represent the actual required cooling capacity or heat load. Then, according to the size of the temperature difference △T, the air conditioner is controlled to enter different energy-saving modes, such as energy-saving mode A, B or C, and in different In the energy-saving mode, the compressor and external motor of the air conditioner are controlled to operate in different states, achieving phased energy-saving operation according to the heat load or cooling capacity, and dynamically adjusting the energy-saving mode of the air conditioner according to the heat load or cooling capacity. Achieve precise control, effective energy saving and ensure comfort.

Further, the energy-saving control method of the inverter air conditioner is used for energy-saving control during the cooling mode operation of the air conditioner.

Specifically, in step S1, the user can control the air conditioner to enter the cooling mode through wired or wireless devices such as remote control, body buttons or mobile app. When the air conditioner enters the cooling mode and the energy saving function is turned on, the user manually selects or Automatically enter energy saving mode according to user settings.

As some embodiments of the present application, as shown in Figure 1, in step S1, the user controls the air conditioner to enter the cooling mode through the remote control. After the air conditioner enters the cooling mode, it first operates in the conventional cooling mode, and then determines whether the energy-saving function is turned on. , if the energy-saving function is not turned on, it will continue to operate in the regular cooling mode; if the energy-saving function is turned on, it will enter the energy-saving mode.

Further, after entering the energy-saving mode through the step S1, the air conditioner continues to run the step S2, and obtains the indoor ambient temperature T _{inner ring} and the user _set temperature T through the step S2, and calculates the temperature difference ΔT.

Furthermore, after the value of the temperature difference ΔT is calculated through the step S2, the air conditioner continues to run the step S3, determines the temperature interval to which the temperature difference ΔT belongs, and then controls it according to the temperature interval to which the temperature difference ΔT belongs. The air conditioner enters the corresponding energy-saving mode A, B or C.

Specifically, in the step S3, the value of the temperature difference ΔT is divided into three temperature intervals through the preset temperature difference thresholds T _{first threshold} and T _{second threshold} , and the following are: T _{first threshold} < ΔT The first temperature interval, the second temperature interval with T _{second threshold value} < ΔT ≤ T _{first threshold value} , and the third temperature interval with ΔT ≤ T _{second threshold value} , when the value of the temperature difference ΔT is within the first temperature interval When the value of the temperature difference △T is within the second temperature range, the air conditioner enters the energy-saving mode B. When the value of the temperature difference △T is within the third temperature range, The air conditioner enters energy-saving mode C operation.

Furthermore, in the energy-saving mode A, the compressor of the air conditioner operates at _{the first energy-saving frequency of} F, and the external motor operates at _{the first energy-saving speed} of N; in the energy-saving mode B, the compressor of the air conditioner operates at the first energy-saving frequency of F. When running _{at the second energy-saving frequency} , the external motor operates at the N _{second energy-saving speed} ; in the energy-saving mode C, the operating frequency of the air conditioner compressor is between the F _{second energy-saving frequency} and the F _{third energy-saving frequency} , and the external motor operates at the N second energy-saving frequency. N runs _{at the third energy-saving speed} .

Wherein, the magnitudes of the F _{first energy-saving frequency} , F _{the second energy-saving frequency} and F _{the third energy-saving frequency} decrease in sequence, that is, F _{the first energy-saving frequency} > F _{the second energy-saving frequency} > F _{the third energy-saving frequency} ; the N _{first energy} -saving frequency _{The energy-saving speed} , N _{second energy-saving speed} and N _{third energy-saving speed} can be equal, or they can decrease in sequence, that is, N _{first energy-saving speed} > N _{second energy-saving speed} > N _{third energy-saving speed} .

As some embodiments of the present application, in the energy-saving mode A, B or C, the rotation speed of the external motor is not set according to the temperature difference ΔT, but is set according to the temperature T of the outer coil of the air conditioner and the size of _{the outer disk.} . Specifically, when T _{external disk} > T _{first external disk threshold} , the external motor runs N _{first energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ _{T first external disk threshold} , external motor runs N _{second energy-saving speed} ; when When T _{external disk} ≤ T _{second external disk threshold} , the external motor runs N _{third energy-saving speed} ; wherein, the T _{first external disk threshold} and T _{the second external disk threshold are} the preset external disk temperature thresholds, and the N _{first energy-saving speed} , N _{second energy-saving speed} and N _{third energy-saving speed} can be equal, or they can decrease in sequence, that is, N _{first energy-saving speed} > N _{second energy-saving speed} > N _{third energy-saving speed} .

As some embodiments of the present application, in the energy-saving mode A, B or C, the rotation speed of the external motor is not set according to the temperature difference ΔT, but is set according to the temperature T of the outer coil of the air conditioner and the size of _{the outer disk} . . Specifically, when T _{external disk} > T _{first external disk threshold} , the external motor runs N _{first energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ _{T first external disk threshold} , the external motor keeps the current speed unchanged, that is, the external motor The motor runs N _{first energy-saving speed} or N _{second energy-saving speed} ; when T _{external disk} ≤ _{T second external disk threshold} , the external motor runs N _{second energy-saving speed} ; where, the T _{first external disk threshold} and T _{second external disk threshold are} The preset external disk temperature threshold, the N _{first energy-saving rotation speed} > N _{the second energy-saving rotation speed} .

In this application, _{the first threshold} of the temperature difference threshold T is a preset value. It is generally believed that when △T>T _{the first threshold} , the indoor ambient temperature T _{in the inner ring} is much higher than the user- _set temperature T, such as T _{first The threshold is} 5°C. At this time, the air conditioner needs to cool quickly to avoid affecting the user's comfort.

In addition, the F _{first energy-saving frequency} and N _{first energy-saving speed} are values that have been tested many times in the laboratory. At this operating frequency and speed, the air conditioner basically meets the indoor cooling needs, and at the F _{first energy-saving frequency} and N At _{the first energy-saving speed} , the overall operating power of the air conditioner is lower than the power in the normal cooling mode, which has a certain energy-saving effect and ensures that the user's comfort will not be significantly damaged. Therefore, in the energy-saving mode A, The air conditioner operates according to the F _{first energy-saving frequency} and N _{first energy-saving speed} , which can achieve a certain energy saving effect while ensuring that comfort will not be significantly reduced.

Further, when the air conditioner enters the energy saving mode A, it is detected and judged every set time whether the operating time of the air conditioner in the energy saving mode A is >t _{the first time period} . If so, the indoor ambient temperature T is detected again. _{The inner loop} and the user set temperature T _{are set} , the temperature difference ΔT is calculated, and it is judged whether the temperature difference ΔT meets _{the first threshold of} ΔT ≤ T. If so, the air conditioner is controlled to enter the energy-saving mode B.

Furthermore, when the air conditioner enters the energy saving mode A, it detects and determines whether the operating time of the air conditioner in the energy saving mode A is _{greater than the first time period} every set time. If not, it continues to operate in the energy saving mode. A operation; if so, detect the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting again, calculate the temperature difference △T, and determine whether the temperature difference △T meets _{the first threshold of} △T ≤ T. If so, control the air conditioner to enter the desired state. Describe energy-saving mode B; if not, continue to operate in energy-saving mode A.

In this application, it is considered that when △T ≤ T _{first threshold} , the indoor ambient temperature T _{inner loop} enters the user's comfort temperature range. At this time, even if the operating frequency of the compressor and the rotation speed of the external motor are further reduced, and the cooling speed is sacrificed, It also has less impact on the user's physical comfort. Therefore, the operating frequency of the compressor and the speed of the external motor can be further reduced to achieve energy saving. That is, in the energy-saving mode A, when the operating time of the air conditioner in the energy-saving mode A > t _{first time period} , and ΔT ≤ T _{first threshold} , the air conditioner can be made to operate according to _{the second energy-saving frequency of} F and N Operation _{at the second energy-saving speed} . Among them, F _{the second energy-saving frequency} and N _{the second energy-saving speed} are values that have been tested many times in the laboratory. At this operating frequency and speed, the air conditioner has the highest energy efficiency, good energy saving, and has certain The cooling effect can meet the user's comfort requirements. At the same time, in general, the frequency reduction speed of the air conditioner in the cooling mode is slow during rapid cooling. The cooling capacity of the air conditioner is higher than the heat load of the room, causing the indoor ambient temperature T _{in the inner loop} to first be lower than the user set temperature T _setting , and then rebound back to the user set temperature T. Near the constant temperature T _setting , and the process of rapid frequency adjustment of the compressor described in this application from _{the first energy-saving frequency} of F to _{the second energy-saving frequency of} F can quickly bring the room heat load and the cooling capacity of the air conditioner close to each other, avoiding the effects of excessive cooling. Reduce unnecessary power consumption and further achieve energy saving effect.

Further, when the air conditioner enters the energy saving mode B, it detects and determines whether the operating time of the air conditioner in the energy saving mode B is >t _{second time period} every set time. If so, the indoor ambient temperature T is detected again. _{The inner loop} and the user set temperature T _{are set} , the temperature difference △T is calculated, and the temperature range of the temperature difference △T is determined. If △T>T _{the first threshold,} the air conditioner is controlled to enter the energy-saving mode A; if △T ≤ T _{second threshold} , the air conditioner is controlled to enter the energy-saving mode C.

Furthermore, when the air conditioner enters the energy saving mode B, it is detected and judged every set time whether the operating time of the air conditioner in the energy saving mode B is >t _{the second time period} . If not, the operation time of the air conditioner in the energy saving mode B is continued. B operation; if so, detect the indoor ambient temperature T _{inner loop} and user set temperature T _setting again, calculate the temperature difference △T, and determine the temperature range described by the temperature difference △T. If △T>T _{first threshold,} control the air conditioner Enter the energy-saving mode A; if ΔT ≤ T _{second threshold} , control the air conditioner to enter the energy-saving mode C.

In this application, it is considered that when △T ≤ T _{second threshold} , _{the inner ring of} indoor ambient temperature T is located near the user- _set temperature T, or lower than the user-set temperature, such as _{the second threshold of T is} 1°C or -1 ℃, it can be considered that the indoor ambient temperature T _{inner loop} is moderate, and there is no need to continue cooling. The compressor frequency is automatically adjusted between _{the second energy-saving frequency} F and _{the third energy-saving frequency} F, so that the cooling capacity of the air conditioner can dynamically increase slightly according to the indoor heat load. Adjust so that the indoor ambient temperature T _{inner loop} is basically equal to the user-set temperature T _setting to avoid excessive cooling or rebound of the indoor ambient temperature T _{inner loop} .

Further, when the air conditioner enters the energy saving mode C, it is detected and judged every set time whether the operating time of the air conditioner in the energy saving mode C is >t _{for the third time} . If so, the indoor ambient temperature T is detected again. _{The inner loop} and the user set temperature T _{are set} , the temperature difference △T is calculated, and the temperature range of the temperature difference △T is determined. If △T>T _{the second threshold,} the air conditioner is controlled to enter the energy-saving mode B; if △T ≤ T _{At the third threshold} , the air conditioner is controlled to enter the temperature reaching shutdown state. Wherein, the T _{third threshold is} a preset temperature difference threshold, and the T _{third threshold} < T _{second threshold} < T _{first threshold} .

Furthermore, when the air conditioner enters the energy-saving mode C, it is detected and judged every set time whether the operating time of the air-conditioner in the energy-saving mode C is >t _{the third time} . If not, the operation time of the air conditioner in the energy-saving mode C is continued. C operation; if so, detect the indoor ambient temperature T _{inner loop} and user set temperature T _setting again, calculate the temperature difference △T, and determine the temperature range described by the temperature difference △T. If △T>T _{second threshold} , control the air conditioner Enter the energy-saving mode B; if △T ≤ T _{third threshold} , the indoor ambient temperature T _{inner loop} is too low, user comfort is poor, and the air conditioner needs to stop outputting cooling capacity. At this time, the air conditioner is controlled to enter the temperature shutdown state. After the device enters the temperature shutdown state, it will detect the indoor ambient temperature T _{inner loop} and the user-set temperature T _setting again every set time, calculate the temperature difference △T, and determine whether the temperature difference △T meets _{the second threshold of} △T>T. If yes, the air conditioner is controlled to enter the energy-saving mode B; if not, the current state is maintained.

Specifically, when the air conditioner enters the Darwin shutdown state, the compressor and external motor of the air conditioner stop running.

Furthermore, when the user sets the automatic wind mode, in the energy-saving mode A, the internal motor of the air conditioner runs at a high wind or strong wind speed; in the energy-saving mode B, the internal motor of the air conditioner runs at a high wind or strong wind speed. Mid-range gear; in the energy-saving mode C, the internal motor of the air conditioner operates at low-wind or silent wind gear.

In addition, this application also provides an energy-saving control device for an inverter air conditioner. The energy-saving control device operates according to the above-mentioned energy-saving control method. The energy-saving control device includes:

The detection unit includes a plurality of temperature sensors and other temperature sensing devices. Through the temperature sensing device, the detection unit can detect the indoor ambient temperature T _{of the inner ring} , the temperature of the outer coil T of the outer _disk , etc. when running the above energy-saving control method. Various measured temperatures required;

Storage unit, the above-mentioned various preset values are pre-stored in the storage unit, such as the preset temperature difference threshold T _{first threshold} , T _{second threshold} and T _{third threshold} , and the preset operating frequency of the compressor in each energy-saving mode. F _{the first energy-saving frequency} , F _{the second energy-saving frequency} and F _{the third energy-saving frequency} , the speed of the external motor in each energy-saving mode is preset N _{the first energy-saving speed} , N _{the second energy-saving speed} and N _{the third energy-saving speed} , the preset External disk temperature threshold T _{first external disk threshold} and T _{second external disk threshold} , preset running time thresholds t _{first duration} , t _{second duration} and t _{third duration,} etc.;

Determination unit, the determination unit can perform corresponding determination actions according to the above-mentioned energy-saving control method, such as determining the temperature range to which the temperature difference ΔT belongs, determining whether the energy-saving function is turned on, determining whether the operating time of the air conditioner in each energy-saving mode meets the requirements, etc. ;

A control unit capable of controlling the air conditioner to operate according to the above energy-saving control method based on the information transmitted by the detection unit, storage unit and determination unit.

Furthermore, the temperature sensing device may be a built-in temperature sensor of an air conditioner, a built-in temperature sensor of a remote control, a WIFI network or a smart wearable device, etc.

Furthermore, this application also provides an air conditioner. The air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor heat exchanger, an internal motor and other components. The outdoor unit includes a compressor, an external motor and an outdoor unit. heat exchanger, etc., the temperature T of _{the outer} coil is the coil temperature of the outdoor heat exchanger. The air conditioner also includes a computer-readable storage medium and a processor storing a computer program. The computer When the program is read and run by the processor, the above energy-saving control method is implemented.

This application also provides a computer-readable storage medium that stores a computer program. When the computer program is read and run by a processor, the above-mentioned energy-saving control method is implemented.

In summary, it is not difficult to conclude that the energy-saving control method, device, air conditioner and storage medium of the inverter air conditioner described in this application can dynamically adjust the compressor frequency and external motor speed of the air conditioner according to the indoor heat load or cooling capacity. Under high load conditions, on the premise of ensuring that the air conditioner outputs sufficient cooling capacity, the cooling speed is sacrificed to appropriately save energy; under medium heat load conditions, the compressor frequency and external motor speed set by the air conditioner make the entire system highly energy efficient and save energy. Efficient; under low heat load conditions, the air conditioner dynamically adjusts the frequency of the compressor and the speed of the external motor to only output the minimum cooling capacity, which not only meets the cooling effect and user comfort, but also has a certain energy-saving effect.

Although the present invention is disclosed as above, the present invention is not limited thereto. In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims (6)

1. An energy-saving control method for an inverter air conditioner, characterized in that the energy-saving control method for an inverter air conditioner is used for energy-saving control during the cooling mode operation of the air conditioner; it includes the steps: S1, the user controls the air conditioner to enter the cooling mode through a wired or wireless device. When the air conditioner enters the cooling mode and turns on the energy-saving function, it automatically enters the energy-saving mode through the user's manual selection or according to the user's settings; S2, obtain the indoor ambient temperature T _{inner loop} and the user set temperature T _setting , and calculate the temperature difference ΔT, where ΔT = T _{inner loop} - T _setting ; S3, determine the temperature range to which the temperature difference △T belongs, and enter energy-saving mode A, B or C according to the temperature range to which the temperature difference △T belongs; In the step S3, the value of the temperature difference ΔT is divided into three temperature intervals through the preset temperature difference thresholds T _{first threshold} and T _{second threshold} , which are the first temperatures of T _{first threshold} < ΔT. interval, the second temperature interval of T _{second threshold value} < ΔT ≤ T _{first threshold value} and the third temperature interval of ΔT ≤ T _{second threshold value} , when the value of the temperature difference ΔT is within the first temperature interval, the air conditioner The air conditioner enters energy-saving mode A to operate; when the value of the temperature difference ΔT is within the second temperature interval, the air conditioner enters energy-saving mode B; when the value of the temperature difference ΔT is within the third temperature interval, the air conditioner enters Energy saving mode C operation; In the energy-saving mode A, the compressor of the air conditioner operates at _{the first energy-saving frequency of} F, and the external motor operates at _{the first energy-saving speed} of N; in the energy-saving mode B, the compressor of the air conditioner operates at _{the second energy-saving frequency of} F. operation, the external motor runs at the N _{second energy-saving speed} ; in the energy-saving mode C, the operating frequency of the air conditioner compressor is between the F _{second energy-saving frequency} and the F _{third energy-saving frequency} , and the external motor runs at the N _{third energy-saving speed. Speed} operation; wherein, the F _{first energy-saving frequency} > F _{second energy-saving frequency} > F _{third energy-saving frequency} ; the N _{first energy-saving speed} , N _{second energy-saving speed} and N _{third energy-saving speed} are equal or N _{first energy-saving speed Rotation speed} > N _{second energy-saving speed} > N _{third energy-saving speed} , wherein the F _{first energy-saving frequency} , F _{second energy-saving frequency} and F _{third energy-saving frequency} decrease in order, and the N first energy-saving speed, _{Nth energy-saving frequency The second energy-saving speed} and the N _{third energy-saving speed} are equal or decrease in sequence; After the air conditioner enters the energy-saving mode A, it detects and determines whether the operating time of the air conditioner in the energy-saving mode A is _{greater than the first time period} every set time. If so, it detects the indoor ambient temperature T _{inner ring} and the user again. _Set the temperature T, calculate the temperature difference ΔT, and determine whether the temperature difference ΔT meets _{the first threshold} of ΔT ≤ T. If so, control the air conditioner to enter the energy-saving mode B; After the air conditioner enters the energy-saving mode B, it detects and determines whether the operating time of the air conditioner in the energy-saving mode B is _{greater than the second time period} every set time. If so, it detects the indoor ambient temperature T _{inner loop} and the user again. _Set the temperature T, calculate the temperature difference △T, and determine the temperature range of the temperature difference △T. If △T>T _{the first threshold,} control the air conditioner to enter the energy-saving mode A; if △T ≤ T _{the second threshold} , Then control the air conditioner to enter the energy-saving mode C; After the air conditioner enters the energy-saving mode C, it detects and determines whether the operating time of the air conditioner in the energy-saving mode C is _{greater than the third time period} every set time. If so, it detects the indoor ambient temperature T _{inner ring} and the user again. _Set the temperature T, calculate the temperature difference △T, and determine the temperature range of the temperature difference △T. If △T>T _{the second threshold,} control the air conditioner to enter the energy-saving mode B; if △T ≤ T _{the third threshold} , Then the air conditioner is controlled to enter the temperature-reaching shutdown state, where the T _{third threshold is} the preset temperature difference threshold, and the T _{third threshold} < T _{second threshold} < T _{first threshold} ; After the air conditioner enters the temperature shutdown state, the compressor and external motor of the air conditioner stop running, and the indoor ambient temperature T _{inner ring} and the user _set temperature T are detected again every set time, the temperature difference △T is calculated, and the judgment is made Whether the temperature difference ΔT satisfies _{the second threshold of} ΔT>T, if so, the air conditioner is controlled to enter the energy-saving mode B, if not, the current state is maintained. 2. The energy-saving control method according to claim 1, characterized in that in the energy-saving mode A, B or C, the rotation speed of the external motor is set according to the temperature T of the external coil of the air conditioner and the size of _{the external disk} : when T When _{external disk} > T _{first external disk threshold} , the external motor runs at N _{first energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ _{T first external disk threshold} , external motor runs at N _{second energy-saving speed} ; when T _{external disk} ≤ T _first When _{the external disk threshold is 2} , the external motor runs N _{third energy-saving speed} ; wherein, the T _{first external disk threshold} and T _{the second external disk threshold are} the preset external disk temperature thresholds, and the N _{first energy-saving speed} and N _{second energy-saving speed} It is equal to N _{third energy-saving speed} or N _{first energy-saving speed} > N _{second energy-saving speed} > N _third energy-saving _speed . 3. The energy-saving control method according to claim 1, characterized in that, in the energy-saving mode A, B or C, the rotation speed of the external motor is set according to the temperature T of the external coil of the air conditioner and the size of _{the external disk} : when T When _{external disk} > T _{first external disk threshold} , the external motor runs N _{first energy-saving speed} ; when T _{second external disk threshold <} T _{external disk} ≤ _{T first external disk threshold} , the external motor keeps the current speed unchanged; when T _{external disk} ≤ T _second When _{the external disk threshold is reached} , the external motor runs N _{second energy-saving speed} ; wherein, the T _{first external disk threshold} and T _{the second external disk threshold are} preset external disk temperature thresholds, and the N _{first energy-saving speed} > N _{second energy-saving speed} . 4. An energy-saving control device for an inverter air conditioner, characterized in that the energy-saving control device operates according to the energy-saving control method described in any one of claims 1 to 3. 5. An air conditioner, characterized in that the air conditioner includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and run by the processor, the computer program as claimed in claim 1 is implemented. -The energy-saving control method described in any one of -3. 6. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is read and run by a processor, the computer program implements any one of claims 1-3. The energy-saving control method described above.