CN112032950B - Air conditioner heat storage control method - Google Patents

Abstract

The invention relates to the technical field of air conditioning, in particular to an air conditioner heat storage control method. The invention aims to solve the problems of short service life of a compressor and large temperature fluctuation of a coil pipe in the existing preheating scheme. To this end, the heat storage control method includes: acquiring a preset starting time and an outdoor environment temperature; correcting the preset starting-up time based on the time correction parameter; determining a heat storage time based on the outdoor ambient temperature; calculating a heat storage starting time based on the corrected preset starting time and the heat storage time; when the heat accumulation starting moment is reached, controlling the compressor to operate at a first heat accumulation frequency and controlling the outdoor fan to operate at a first heat accumulation rotating speed; detecting the temperature of the coil; judging the temperature of the coil pipe and the first preset temperature; and selectively adjusting the rotating speed of the outdoor fan and/or the running frequency of the compressor based on the judgment result. Through the control mode, the service life of the compressor can be prolonged, the fluctuation of the temperature of the coil pipe in the heat storage process is reduced, and the user experience is improved.

Description

Air conditioning heat storage control method

technical field

The invention relates to the technical field of air conditioning, in particular to a heat storage control method for an air conditioner.

Background technique

When the air conditioner is activated in cold winter, due to the low indoor and outdoor temperatures, the air blown out after the air conditioner is activated at this time is cold air, which seriously affects the user experience. When the anti-cold wind mode is started, the compressor and the outdoor fan are started to store heat, and the indoor fan is controlled after the temperature rises, so as to avoid the situation that the cold air is blown out when the machine is turned on. However, in practical applications, the air conditioner waits for a long time due to the operation of the anti-cold air mode within a few minutes after it is turned on.

For the above problem, the solution in the prior art is to control the compressor to preheat the coil of the indoor unit before starting the machine, so as to realize the effect of immediately outputting hot air when the user turns on the machine. However, in the actual implementation process of the above solution, the compressor usually runs intermittently. When the coil temperature reaches the preset upper limit temperature, the compressor stops running until the coil temperature drops to the preset lower limit temperature and restarts. . However, this control method not only causes the compressor to be started frequently and affects its life, but also causes the coil temperature to fluctuate greatly, resulting in a poor user experience.

Accordingly, there is a need in the art for a new air conditioning heat storage control method to solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the above problems in the prior art, that is, in order to solve the problems of short compressor life and large coil temperature fluctuations existing in the existing preheating scheme, the present invention provides a heat storage control method for an air conditioner, wherein the air conditioner includes a compression A fan, a throttling element, an outdoor heat exchanger and an outdoor fan, an indoor heat exchanger and an indoor fan, the outdoor fan is a DC fan, and the heat storage control method includes:

obtaining the preset startup time and outdoor ambient temperature of the air conditioner;

correcting the preset power-on time based on the time correction parameter;

determining the heat storage time of the air conditioner based on the outdoor ambient temperature;

calculating the heat storage start time of the air conditioner based on the revised preset power-on time and the heat storage time;

When the heat storage start time is reached, controlling the compressor to operate at a first heat storage frequency;

Controlling the outdoor fan to operate at a first thermal storage speed at the same time, before or after the compressor starts to operate;

Detecting the coil temperature of the indoor heat exchanger during the operation of the compressor at the first heat storage frequency;

Determine the size of the coil temperature and the first preset temperature;

Based on the judgment result, the rotational speed of the outdoor fan and/or the operating frequency of the compressor are selectively adjusted.

In the preferred technical solution of the above air-conditioning heat storage control method, the step of "selectively adjusting the rotational speed of the outdoor fan and/or the operating frequency of the compressor based on the judgment result" further includes:

When the temperature of the coil is greater than the first preset temperature, controlling the compressor to maintain the operation at the first heat storage frequency, and controlling the outdoor fan to operate at a second heat storage speed;

Wherein, the first heat storage speed is greater than the second heat storage speed;

When the coil temperature is less than or equal to the first preset temperature, the compressor is controlled to maintain the first heat storage frequency to operate, and the outdoor fan is controlled to maintain the first heat storage rotational speed to operate.

In a preferred technical solution of the above air-conditioning heat storage control method, after the step of "controlling the compressor to maintain the first heat storage frequency and controlling the outdoor fan to operate at the second heat storage speed", the The thermal storage control method also includes:

detecting the temperature of the coil;

comparing the size of the coil temperature with the first preset temperature and the second preset temperature;

selectively controlling the compressor to operate at a second heat storage frequency based on the comparison;

Wherein, the first preset temperature is lower than the second preset temperature, and the first heat storage frequency is greater than the second heat storage frequency.

In a preferred technical solution of the above air-conditioning heat storage control method, the step of "selectively controlling the compressor to operate at the second heat storage frequency based on the comparison result" further comprises:

When the coil temperature is greater than the second preset temperature, controlling the compressor to operate at the second heat storage frequency;

When the coil temperature is less than or equal to the second preset temperature and greater than the first preset temperature, the compressor is controlled to maintain the operation of the first heat storage frequency.

In a preferred technical solution of the above air-conditioning heat storage control method, after the step of "controlling the compressor to operate at the second heat storage frequency", the heat storage control method further includes:

detecting the temperature of the coil;

comparing the coil temperature with the first preset temperature and the second preset temperature;

Based on the comparison result, the compressor is selectively controlled to operate at the second thermal storage frequency, and the outdoor fan is controlled to operate at the first thermal storage rotational speed.

In a preferred technical solution of the above air-conditioning heat storage control method, "based on the comparison result, selectively control the compressor to maintain the second heat storage frequency to operate, and control the outdoor fan to rotate at the first heat storage speed. The steps to run" further include:

When the temperature of the coil is greater than the first preset temperature and less than or equal to the second preset temperature, the compressor is controlled to maintain the second heat storage frequency to operate, and the outdoor fan is controlled to operate at the specified temperature. running at the first heat storage speed;

When the coil temperature is greater than the second preset temperature, the compressor is controlled to maintain the operation of the second heat storage frequency.

In the preferred technical solution of the above air-conditioning heat storage control method, the heat storage control method further includes:

When the coil temperature is less than or equal to the first preset temperature, the compressor is controlled to operate at the first thermal storage frequency, and the outdoor fan is controlled to operate at the first thermal storage rotational speed.

In a preferred technical solution of the above air conditioning heat storage control method, the time correction parameter is determined based on the preset start-up time and historical actual start-up time of the air conditioner during the last operation of the air conditioner.

In the preferred technical solution of the above air-conditioning heat storage control method, the step of "the time correction parameter is determined based on the preset start-up time within a set number of days and the historical actual start-up time of the air conditioner during the last operation of the air conditioner" further includes: :

Obtain the historical preset power-on time and historical actual power-on time within the set number of days;

calculating the mean value of the historical preset power-on time and the mean value of the historical actual power-on time;

calculating the first difference between the mean value of the historical actual power-on time and the mean value of the historical preset power-on time;

The first difference value is determined as the time correction parameter.

In the preferred technical solution of the above-mentioned air conditioning heat storage control method, the step of "correcting the preset startup time based on the time correction parameter" further includes:

Calculate the sum between the preset power-on time and the time correction parameter.

Those skilled in the art can understand that, in the preferred technical solution of the present invention, the air conditioner includes a compressor, a throttling element, an outdoor heat exchanger and an outdoor fan, an indoor heat exchanger and an indoor fan, and the outdoor fan is a DC fan, and the storage The thermal control method includes: acquiring the preset startup time of the air conditioner and the outdoor ambient temperature; revising the preset startup time based on the time correction parameter; determining the heat storage time of the air conditioner based on the outdoor ambient temperature; Heat time, calculate the heat storage start time of the air conditioner; when the heat storage start time is reached, control the compressor to run at the first heat storage frequency; at the same time, before or after the compressor starts to run, control the outdoor fan to run at the first heat storage frequency speed operation; during the compressor running at the first heat storage frequency, the coil temperature of the indoor heat exchanger is detected; the size of the coil temperature and the first preset temperature is judged; based on the judgment result, the outdoor fan is selectively adjusted speed and/or compressor operating frequency.

Through the above control method, the heat storage control method of the present invention can increase the life of the compressor, greatly reduce the fluctuation of the coil temperature during the heat storage process of the air conditioner, and improve the user experience. Specifically, by adjusting the frequency and/or the frequency of the compressor based on the comparison result between the coil temperature and the first preset temperature during the process that the compressor is running at the first heat storage frequency and the outdoor fan is running at the first heat storage speed The speed of the outdoor fan keeps the compressor running during the heat storage stage, which ensures that the coil temperature is always in a relatively stable temperature range. By adjusting the operating frequency of the compressor and the speed of the outdoor fan, it is possible to Keep the coil temperature in a relatively stable state to avoid the problem of poor user experience due to large coil temperature fluctuations.

By correcting the preset boot time based on the time correction parameter, the control method of the present invention can correct the preset boot time based on the user's boot habits, so that the corrected preset boot time is closer to the user's real boot time, thereby The heat storage of the air conditioner based on the modified preset power-on time can avoid energy waste caused by insufficient heat storage time or too long heat storage time, achieve precise and personalized treatment for individual users, and improve user experience . By determining the heat storage time of the air conditioner based on the outdoor ambient temperature, the heat storage time is corrected based on the outdoor ambient temperature, which further ensures the accuracy of the heat storage time and avoids wasting energy.

In particular, it should be noted that when the air conditioner is running in the heat storage mode, the compressor is designed to operate intermittently, so that the compressor has a rest time and saves power. When it is started repeatedly intermittently, due to the large fluctuation of various parameters when it starts to run, it is more prone to damage and wastes more power. When the compressor is running in the heat storage mode, because the required heat storage frequency is extremely small, the power consumption when it is always running is also extremely small, which is more conducive to the long-term use of the compressor. Therefore, the control method of the present application can make the compressor run more smoothly, have a longer service life, have less fluctuation in coil temperature, and have better heat storage effect.

Further, when the coil temperature rises to be greater than the first preset temperature, the compressor is kept running at the first heat storage frequency, and the outdoor fan is controlled to run at the second heat storage speed with a lower speed, the control method of the present invention is achieved. It can effectively reduce the pressure of the refrigerant system, reduce the fluctuation of the coil temperature, and only use the outdoor fan to reduce the speed to fine-tune the coil temperature, and the adjustment effect is better.

Further, the control method of the present invention can ensure the operating life of the compressor by controlling the compressor to operate at a reduced frequency while keeping the outdoor fan running at the second heat storage speed when the coil temperature rises to be greater than the second preset temperature. , and by controlling the compressor to keep running all the time to reduce the fluctuation of the coil temperature and ensure the stability of the coil temperature.

Further, when the coil temperature drops to be greater than the first preset temperature and less than or equal to the second preset temperature, the compressor is controlled to keep running at the second heat storage frequency, and the outdoor fan is controlled to run at the first heat storage speed, The control method of the present invention can reduce the frequent frequency up and down of the compressor as much as possible, and ensure the service life and operation stability of the compressor. The temperature of the coil is effectively increased, and the temperature fluctuation of the coil in the process of increasing is small, and the effect is good.

Further, when the coil temperature drops to less than or equal to the first preset temperature, while controlling the outdoor fan to keep running at the first heat storage speed, the compressor is controlled to increase the frequency to run at the first heat storage frequency, so that the compressor's frequency is increased. The frequency is increased steadily, so that the coil temperature is further increased, and the coil temperature fluctuation is small in the process of increasing.

Further, by performing statistical calculation on the historical preset power-on time and the historical actual power-on time within the set number of days, the first difference between the average value of the preset power-on time within the set number of days and the average value of the historical actual power-on time is calculated. The first difference is used as the time correction parameter. This control method can calculate and determine the time correction parameter by using the user’s habit of using the air conditioner in the recent period, so that the preset power-on time corrected by the time correction parameter is closer to the The actual boot time of the user in the most recent period.

Description of drawings

The air conditioning heat storage control method of the present invention will be described below with reference to the accompanying drawings. In the attached picture:

1 is a flowchart of a method for controlling heat storage of an air conditioner in a first embodiment of the present invention;

Fig. 2 is the logic control diagram of the air-conditioning heat storage control method in the first embodiment of the present invention;

3 is a flowchart of a method for controlling heat storage of an air conditioner in a second embodiment of the present invention;

4 is a flowchart of a method for controlling heat storage of an air conditioner in a third embodiment of the present invention;

5 is a flowchart of a method for controlling heat storage of an air conditioner in a fourth embodiment of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention. For example, although in this embodiment, the compressor starts to run and the outdoor fan is controlled to run at the first heat storage speed as an example for description, those skilled in the art can adjust the sequence in which the compressor and the fan are turned on. The adjustment does not deviate from the principles of the present invention. For example, it is also possible to control the operation of the outdoor fan before or after the compressor is turned on.

Example 1

First, referring to FIG. 1 and FIG. 2 , the air conditioner heat storage control method of the present invention will be described. 1 is a flowchart of a method for controlling heat storage of an air conditioner in a first embodiment of the present invention; and FIG. 2 is a logic control diagram of a method for controlling heat storage in an air conditioner in the first embodiment of the present invention.

As shown in FIG. 1, in order to solve the problems of short compressor life and large coil temperature fluctuation existing in the existing preheating scheme, the air conditioner of the present invention includes a compressor, a throttling element, an outdoor heat exchanger and an outdoor fan, and an indoor heat exchanger. Heater and indoor fan, wherein the compressor is a variable frequency compressor, and the outdoor fan is a DC fan. The main steps of the air conditioning heat storage control method include:

S101. Control the compressor to run at a first heat storage frequency. For example, when the air conditioner operates in a heat storage mode, control the compressor to run at a frequency lower than the rated operating frequency. For example, the first heat storage frequency is 50 Hz. In hot mode, control the compressor to run at 50Hz;

S102. When the compressor starts to run, control the outdoor fan to run at the first heat storage speed; for example, if the outdoor fan is a DC fan, and the first heat storage speed can be 1000r/min, when the compressor starts to run, control the outdoor fan to run at the first heat storage speed. The fan starts and runs at the first heat storage speed of 1000r/min. Of course, the start timing of the outdoor fan can also be before or after the compressor starts to run, as long as the outdoor fan starts to run correspondingly when the compressor is running.

S103. During the operation of the compressor at the first heat storage frequency, detect the coil temperature of the indoor heat exchanger; for example, during the operation of the compressor at the first heat storage frequency, through A nearby temperature sensor detects the coil temperature of the indoor heat exchanger.

S104. Determine the size of the coil temperature and the first preset temperature. If the first preset temperature is 38°C, determine the detected coil temperature and the size of 38°C;

S105. Based on the judgment result, selectively adjust the rotational speed of the outdoor fan and/or the operating frequency of the compressor; for example, when the coil temperature is greater than 38°C, control the outdoor fan to reduce the rotational speed, and control the compressor to maintain the first heat storage frequency run; for another example, when the coil temperature is less than or equal to 38°C, the outdoor fan is controlled to run at the first heat storage speed and the compressor is controlled to run at the first heat storage frequency.

It can be seen from the above description that the heat storage control method of the present invention can increase the life of the compressor, greatly reduce the fluctuation of the coil temperature during the heat storage process of the air conditioner, and improve the user experience. Specifically, by adjusting the frequency and/or the frequency of the compressor based on the comparison result between the coil temperature and the first preset temperature during the process that the compressor is running at the first heat storage frequency and the outdoor fan is running at the first heat storage speed The speed of the outdoor fan keeps the compressor running during the heat storage stage, which ensures that the coil temperature is always in a relatively stable temperature range. By adjusting the operating frequency of the compressor and the speed of the outdoor fan, it is possible to Keep the coil temperature in a relatively stable state to avoid the problem of poor user experience due to large coil temperature fluctuations.

Since it is easier to achieve frequency conversion of DC fans, and the DC fans capable of frequency conversion are low in cost, better in effect and widely used, this control method adopts the method of controlling the speed of the DC fan to achieve precise control of the coil temperature.

In particular, it should be noted that when the air conditioner is running in the heat storage mode, the compressor is designed to operate intermittently, so that the compressor has a rest time and saves power. When it is started repeatedly intermittently, due to the large fluctuation of various parameters when it starts to run, it is more prone to damage and wastes more power. When the compressor is running in the heat storage mode, because the required heat storage frequency is extremely small, the power consumption when it is always running is also extremely small, which is more conducive to the long-term use of the compressor. Therefore, the control method of the present application can make the compressor run more smoothly, have a longer service life, have less fluctuation in coil temperature, and have better heat storage effect.

1 and 2, the air conditioner heat storage control method of the present invention will be described in detail.

As shown in FIG. 1 and FIG. 2, in a preferred embodiment, step S105 further includes:

When the coil temperature is greater than the first preset temperature, the compressor is controlled to run at the first heat storage frequency, and the outdoor fan is controlled to run at the second heat storage speed; when the coil temperature is less than or equal to the first preset temperature, the control The compressor runs at the first heat storage frequency, and the outdoor fan is controlled to run at the first heat storage speed; wherein the first heat storage speed is greater than the second heat storage speed. For example, the first preset temperature may be 38°C, the first heat storage frequency may be 50Hz, the first heat storage speed may be 1000r/min, and the second heat storage speed may be 500r/min. When the temperature of the coil is controlled at about 40 ℃, the hot air can be guaranteed to be turned on. After running in heat storage mode for a period of time, when the coil temperature is greater than 38°C, it proves that the coil temperature has approached or exceeded the optimal temperature of 40°C, and the speed of temperature rise needs to be slowed down. At this time, by keeping the compressor running at 50Hz and controlling the outdoor fan to run at the second heat storage speed of 500r/min, the pressure of the air conditioning system is reduced, the phase change process of the refrigerant is weakened, and the temperature rise of the coil is slowed down. When the coil temperature is less than 38°C, it proves that the coil temperature is still low and needs to be heated up quickly. At this time, by keeping the compressor running at 50Hz and controlling the outdoor fan to maintain the first heat storage frequency of 1000r/min, the temperature rise rate of the coil temperature can be guaranteed, so that the coil temperature continues to rise.

Further, after the coil temperature is greater than 38°C, that is, the compressor keeps running at 50Hz, and the outdoor fan runs at the second heat storage speed of 500r/min, the heat storage control method further includes:

Detecting the coil temperature; judging the size of the coil temperature and the first preset temperature and the second preset temperature; and selectively controlling the compressor to operate at the second heat storage frequency based on the comparison result. Specifically, when the coil temperature is greater than the second preset temperature, the compressor is controlled to run at the second heat storage frequency, and the outdoor fan is controlled to maintain the second heat storage speed; when the coil temperature is less than or equal to the second preset temperature When the temperature is greater than the first preset temperature, the compressor is controlled to maintain the first heat storage frequency, and the outdoor fan is controlled to maintain the second heat storage speed; The frequency is greater than the second heat storage frequency. For example, the second preset temperature may be 42° C., and the second heat storage frequency may be the minimum operating frequency of the compressor, such as 30 Hz. When the coil temperature is greater than 42°C, it proves that the coil temperature has exceeded the optimum temperature of 40°C, and it is necessary to cool down slightly to maintain the optimum temperature. At this time, by keeping the outdoor fan running at the second heat storage speed of 500r/min, the frequency of the compressor is reduced to the lowest operating frequency of 30Hz, so that the system pressure is further reduced, so that the energy consumption of the compressor is further reduced. The rate of increase in coil temperature is further slowed down, maintained, or even started to decrease. When the coil temperature is less than 42°C but greater than 38°C, it proves that the coil temperature is close but still lower than the preferred 40°C. At this time, by keeping the compressor running at 50 Hz and the outdoor fan running at the second heat storage speed of 500 r/min, the coil temperature can continue to rise.

Further, after the coil temperature is greater than 42°C, that is, the compressor keeps running at 30Hz and the outdoor fan runs at the second heat storage speed of 500r/min, the heat storage control method further includes:

Detecting the coil temperature; comparing the coil temperature with the first preset temperature and the second preset temperature; based on the comparison result, selectively controlling the compressor to run at the second heat storage frequency, and controlling the outdoor fan to run at the first storage frequency Hot RPM operation. Specifically, when the coil temperature is less than or equal to the second preset temperature and greater than the first preset temperature, the compressor is controlled to keep running at the first heat storage frequency, and the outdoor fan is controlled to run at the first heat storage speed; When the temperature is greater than the second preset temperature, the compressor is controlled to run at the second heat storage frequency, and the outdoor fan is controlled to run at the second heat storage speed. For example, when the coil temperature is less than or equal to 42°C and greater than 38°C, it is proved that the coil temperature has started to drop at this time, and the system pressure needs to be increased to maintain the coil temperature at the optimal temperature of 40°C. At this time, by keeping the compressor running at the minimum operating frequency of 30Hz, the outdoor fan is controlled to increase the speed to the first heat storage speed of 1000r/min, so that the system pressure is increased, so that the decreasing speed of the coil temperature can be slowed down and maintained. , and even began to rise. When the coil temperature is greater than 42°C, it proves that the coil temperature is still higher than the optimum temperature of 40°C. At this time, by keeping the compressor running at the lowest frequency of 30Hz and keeping the outdoor fan running at the second heat storage speed of 500r/min, it is possible to ensure that the compressor operates with low energy consumption, and the temperature rise rate of the coil can be obtained. Slow down, maintain or even decline.

Further, when the temperature of the coil continues to drop to 38°C or even below, the heat storage control method further includes:

The compressor is controlled to operate at the first thermal storage frequency, and the outdoor fan is controlled to keep running at the first thermal storage rotational speed. For example, when the coil temperature is less than 38°C, it is proved that the coil temperature is already in a low state at this time, and it is necessary to rapidly increase the temperature to a better temperature of 40°C. At this time, under the premise of ensuring that the outdoor fan runs at the first heat storage speed of 1000r/min, the operating frequency of the compressor is controlled to increase to 50Hz, which can make the coil temperature rise quickly and avoid the poor user experience caused by the coil temperature being too low. situation arises.

2, a possible working process of the air conditioner of the present invention will be described.

As shown in Figure 2, when the coil temperature is less than 30°C, the air conditioner needs to operate in the heat storage mode, so that the hot air is released when it is turned on. At this time, the compressor is controlled to run at a frequency of 50Hz, and the outdoor fan runs at the first heat storage speed of 1000r/min. Run to make the coil temperature rise → When the coil temperature rises to 38°C, the compressor still keeps running at 50Hz. At this time, the outdoor fan is controlled to run at the second heat storage speed of 500r/min to reduce the system pressure and slow down the indoor coil. → When the coil temperature continues to rise to 42°C, the outdoor fan is controlled to keep running at the second heat storage speed of 500r/min, and the compressor is controlled to reduce to the minimum operating frequency of 30Hz to further slow down The temperature rise rate of the indoor coil → When the temperature of the indoor coil begins to decrease and is less than 42°C, keep the compressor running at the lowest operating frequency of 30Hz, and control the outdoor fan to run at the first heat storage speed of 1000r/min to improve the system pressure to slow down the decreasing speed of the coil temperature → when the temperature of the indoor coil is less than 38℃, keep the outdoor fan running at the first heat storage speed of 1000r/min, and control the compressor to increase the operating frequency to 50Hz to further slow down The rate of decrease in coil temperature.

It should be noted that the above-mentioned preferred embodiments are only used to illustrate the principle of the present invention, and are not intended to limit the protection scope of the present invention. On the premise of not departing from the principles of the present invention, those skilled in the art can adjust the above control manner, so that the present invention can be applied to more specific application scenarios.

For example, in an alternative embodiment, the specific values of the first preset temperature, the second preset temperature, the first heat storage speed, the second heat storage speed, the first heat storage frequency, and the second heat storage frequency It is not static, and those skilled in the art can adjust it without departing from the principle of the present invention, as long as the setting of the value is reasonable. For example, the first preset temperature can be arbitrarily selected from 35°C to 40°C, the second preset temperature can also be arbitrarily selected from 40°C to 45°C; the first heat storage speed can be within 800-1500r/min The second heat storage speed can be any speed within 300-800r/min; the first heat storage frequency can be any value between 40Hz-60Hz, and the second heat storage frequency can be 35Hz in addition to 30Hz wait for a lower operating frequency.

For another example, in another alternative embodiment, although this embodiment is described by taking an example of controlling the outdoor fan to run at the first heat storage speed while the compressor starts to run, those skilled in the art may The compressor and the fan are adjusted in the order in which they operate at the first heat storage speed, and the adjustment does not deviate from the principle of the present invention. For example, it is also possible to control the outdoor fan to start running before or after the compressor runs at the first thermal storage speed.

Of course, the above-mentioned alternative embodiments, as well as between the alternative embodiments and the preferred embodiments, can also be used in cross-combination, so that new embodiments can be combined to be suitable for more specific application scenarios.

Example 2

The second embodiment of the present invention will be described below with reference to FIG. 3 . 3 is a flowchart of a method for controlling heat storage of an air conditioner in a second embodiment of the present invention.

As shown in FIG. 3, in a possible implementation manner, the main steps of the air conditioning heat storage control method include:

S201. Obtain the preset startup time of the air conditioner; the preset startup time in this embodiment may be the startup time actively set by the user, or may be the startup time based on statistics of historical startup moments of the air conditioner. For example, the preset start-up time may be the start-up time set by the user through the remote control, mobile phone APP, etc., or the start-up time of the air conditioner controller or cloud server according to the historical actual start-up time of the air conditioner. The average value of the historical actual start-up time is obtained by statistical calculation of the historical actual start-up time of the air conditioner by methods such as probability theory calculation, and the average value is used as the preset start-up time of the air conditioner this time. The present control method will be described below by taking the statistical calculation performed by the cloud server as an example.

S202, correcting the preset power-on time based on the time correction parameter; the time correction parameter is used to represent the corresponding relationship between the preset power-on time and the actual power-on time, that is, the preset power-on time set or calculated by the user and the actual power-on time deviation between moments. After the user sets or the air conditioner calculates the preset power-on time, the power-on time is corrected based on the time correction parameter. Correcting the time can make the corrected preset boot time closer to the actual boot time of the user. For example, the preset power-on time is 18:00, and the time correction parameter is +10min, then the corrected preset power-on time is 18:00+10min=18:10.

S203 , based on the corrected preset startup time and the preset heat storage time, calculate the heat storage start time of the air conditioner; after revising the preset startup time, the start time of the heat storage mode can be determined based on the heat storage time. For example, if the preset heat storage time of the air conditioner is 5 minutes, then when the preset start-up time is 18:10, the heat storage start time is 18:05.

S204. When the heat storage start time is reached, control the compressor to run at the first heat storage frequency. For example, after the cloud server calculates the heat storage start time, it sends an instruction to start heat storage to the air conditioner when the time reaches 18:05, and controls the compressor to run at a frequency lower than the rated operating frequency, such as the first heat storage The frequency is 50Hz. When the air conditioner operates in the heat storage mode, the compressor is controlled to run at 50Hz;

S205. Control the outdoor fan to run at the first heat storage speed at the same time as, before or after the compressor starts to run; for example, if the outdoor fan is a DC fan, the first heat storage speed may be 1000r/min. At the same time, control the outdoor fan to start and run at the first heat storage speed of 1000r/min. Of course, the start timing of the outdoor fan can also be before or after the compressor starts to run, as long as the outdoor fan starts to run correspondingly when the compressor is running.

S206. During the operation of the compressor at the first heat storage frequency, detect the coil temperature of the indoor heat exchanger; A nearby temperature sensor detects the coil temperature of the indoor heat exchanger.

S207. Determine the size of the coil temperature and the first preset temperature; if the first preset temperature is 38°C, determine the detected coil temperature and the size of 38°C.

S208. Based on the judgment result, selectively adjust the rotational speed of the outdoor fan and/or the operating frequency of the compressor; for example, when the coil temperature is greater than 38°C, control the outdoor fan to reduce the rotational speed, and control the compressor to maintain the first heat storage frequency run; for another example, when the coil temperature is less than or equal to 38°C, the outdoor fan is controlled to run at the first heat storage speed and the compressor is controlled to run at the first heat storage frequency.

It can be seen from the above description that, on the basis of Embodiment 1, by correcting the preset power-on time based on the time correction parameter, the control method of the present invention can correct the preset power-on time based on the user's power-on habits, so that the corrected power-on time can be improved. The preset power-on time is closer to the actual power-on time of the user, so that the air conditioner is stored based on the modified preset power-on time, which can avoid energy waste caused by insufficient heat storage time or too long heat storage time. Accurate and personalized treatment for individual users to improve user experience.

Since steps S204 to S208 are the same as or similar to those in Embodiment 1, they will not be repeated here. Steps S201 to S203 are emphatically introduced below.

In a preferred embodiment, the time correction parameter is determined during the last operation of the air conditioner. Specifically, when the air conditioner received a power-on command to run the last time, such as the same time period the previous day or the same time period a few days ago, when the air conditioner received a power-on command to run in heating mode, first record the current actual power-on time, and then record the current actual power-on time. (Including this time) The historical preset power-on time and historical actual power-on time within the set number of days are counted, and the average value of the historical preset power-on time and the historical actual power-on time within the set number of days are calculated respectively. Then, the first difference between the mean value of the historical actual power-on time and the mean value of the historical preset power-on time is calculated, and the first difference is stored as a time correction parameter for the next correction of the preset power-on time.

For example, the cloud server counts the historical preset power-on time and historical actual power-on time of the air conditioner during the same period (such as 18:00-19:00) in the past 7 days including this time, and calculates all historical preset power-on times The average value of the actual power-on time and the average value of all historical actual power-on times. For example, the average value of the historical preset power-on time is calculated as 18:30, and the average value of the historical actual power-on time is calculated as 18:40, then the first difference is equal to 18:40-18 :30=10min, that is to say, the time correction parameter is 10min, that is, in the past 7 days, the user's actual power-on time is 10min later than the preset power-on time on average. Therefore, when estimating the preset power-on time next time, the sum of the estimated preset power-on time and the time correction parameter is calculated as the corrected preset power-on time, thereby improving the estimation accuracy of the preset power-on time. It also further improves the calculation accuracy of the heat storage start time in the heat storage mode, reduces energy waste, and improves user experience. Of course, the time correction parameter in the above example is described by taking a positive number as an example. If the obtained time correction parameter is a negative number, the present control method is also valid. If the time correction parameter is -10min, it means that the actual boot time of the user in the past 7 days is 10min earlier than the preset boot time on average. Therefore, when the preset boot time is estimated next time, the preset boot time and time correction parameters are calculated by calculating The sum of , that is, the preset power-on time minus 10 minutes is used as the corrected preset power-on time, which can also improve the estimated accuracy of the preset power-on time.

Similarly, when the heating mode is started this time, a new time correction parameter can also be obtained by recording the preset start-up time and the current actual start-up time, and combining with the data of the 7 days before this start-up. It can be used for the next time to correct the default boot time. That is to say, each time the air conditioner receives a start-up command for heating operation, the time correction parameter is calculated and adjusted based on the obtained current actual start-up time and the data within the past set days. This control method makes the adjusted time correction parameter It is more in line with the user's habit of using air conditioners in the recent period, and ensures the accuracy of the adjusted time correction parameters.

In a more preferred embodiment, before adjusting the time correction parameter, it may also be based on the comparison result of the second difference between the current actual power-on time of the current power-on and the preset power-on time and the preset threshold value , determine whether to adjust the time correction parameters. Specifically, when a power-on instruction is received, the current actual power-on time is recorded; the second difference between the current actual power-on time and the preset power-on time is calculated; the size of the second difference and the preset threshold is determined; When the difference between the two is less than the preset threshold, adjust the time correction parameter; otherwise, the time correction parameter is not adjusted, but the last time correction parameter is used.

For example, the preset threshold value can be 20min. When the air conditioner receives the power-on command and runs heating this time, the current actual power-on time is 17:00, and the preset power-on time is 18:00. The difference between the two The value is 60min, and the difference is much larger than the preset threshold of 20min, which indicates that the actual boot time of the user is a special case. The user may return home early due to leave or other reasons, so the current actual boot time should not be It is used to adjust the time correction parameter to prevent the time correction parameter adjusted based on the actual boot time of this time from deviating from the actual habit of the user. Conversely, if the difference between the preset power-on time and the current actual power-on time is within 20 minutes or more within 10 minutes, it proves that this data can be used to adjust the time correction parameters to ensure the adjustment accuracy of the time correction parameters. Avoid wasting energy when storing heat.

It should be noted that the above-mentioned preferred embodiments are only used to illustrate the principle of the present invention, and are not intended to limit the protection scope of the present invention. On the premise of not departing from the principles of the present invention, those skilled in the art can adjust the above setting manners, so that the present invention can be applied to more specific application scenarios.

For example, in an alternative embodiment, the determination timing of the time correction parameter may be adjusted, as long as the adjustment time satisfies the condition earlier than the current correction preset power-on time. For example, the time correction parameter may also be determined before obtaining the preset power-on time.

For another example, in another alternative embodiment, the determination process of the time correction parameter is not static, and those skilled in the art can adjust the calculation process so that the calculated result can be more accurate. For example, in the calculation process, the average value of the historical preset start-up time and the historical test machine start-up time may not be calculated, but the historical preset start-up time and the historical actual start-up time, etc. may be determined by methods such as weighted average.

For another example, in another alternative embodiment, the adjustment timing of the time correction parameter can also be adjusted every time after receiving the power-on command, and the process of judging the size between the second difference and the preset threshold is omitted, The omission of such a process does not depart from the concept of the present invention.

For another example, in another alternative embodiment, the specific values of the set number of days, the time correction parameter, the preset power-on time, and the actual power-on time are only used as exemplary descriptions, and are not intended to limit the protection scope of the present invention. , those skilled in the art can adjust it, and the adjustment does not deviate from the principle of the control method.

Example 3

4, the third embodiment of the present invention will be described. 4 is a flowchart of a method for controlling heat storage of an air conditioner in a third embodiment of the present invention.

As shown in FIG. 4 , in a possible implementation manner, the main steps of the air conditioning heat storage control method include:

S301. Obtain the preset start-up time and outdoor ambient temperature of the air conditioner; for example, the preset start-up time may be the start-up time actively set by the user, or may be the start-up time based on statistics of historical start-up times of the air conditioner; the outdoor ambient temperature can be obtained through The temperature sensor installed in the outdoor unit is collected.

S302. Determine the heat storage time of the air conditioner based on the outdoor ambient temperature; for example, after determining the outdoor ambient temperature, the cloud server calculates the heat storage time matching the outdoor ambient temperature based on the outdoor ambient temperature.

S303. Calculate the heat storage start time of the air conditioner based on the preset power-on time and the heat storage time; for example, after obtaining the preset power-on time and determining the heat storage time, calculate the difference between the two to obtain the heat storage start time. For example, if the heat storage time is determined to be 5 minutes, and the preset start-up time is 18:10, the heat storage start time is 18:05.

S304. When the heat storage start time is reached, control the compressor to run at the first heat storage frequency. For example, after the cloud server calculates the heat storage start time, it sends an instruction to start heat storage to the air conditioner when the time reaches 18:05, and controls the compressor to run at a frequency lower than the rated operating frequency, such as the first heat storage The frequency is 50Hz. When the air conditioner operates in the heat storage mode, the compressor is controlled to run at 50Hz;

S305. Control the outdoor fan to run at the first heat storage speed at the same time as, before or after the compressor starts to run; for example, if the outdoor fan is a DC fan, the first heat storage speed may be 1000 r/min. At the same time, control the outdoor fan to start and run at the first heat storage speed of 1000r/min. Of course, the start timing of the outdoor fan can also be before or after the compressor starts to run, as long as the outdoor fan starts to run correspondingly when the compressor is running.

S306. During the operation of the compressor at the first heat storage frequency, detect the coil temperature of the indoor heat exchanger; for example, during the operation of the compressor at the first heat storage frequency, through A nearby temperature sensor detects the coil temperature of the indoor heat exchanger.

S307. Determine the size of the coil temperature and the first preset temperature; if the first preset temperature is 38°C, determine the detected coil temperature and the size of 38°C.

S308. Based on the judgment result, selectively adjust the rotational speed of the outdoor fan and/or the operating frequency of the compressor; for example, when the coil temperature is greater than 38°C, control the outdoor fan to reduce the rotational speed, and control the compressor to maintain the first heat storage frequency run; for another example, when the coil temperature is less than or equal to 38°C, the outdoor fan is controlled to run at the first heat storage speed and the compressor is controlled to run at the first heat storage frequency.

It can be seen from the above description that, on the basis of Embodiment 1, by obtaining the preset power-on time and determining the heat storage time of the air conditioner based on the outdoor ambient temperature, the heat storage time is corrected based on the outdoor ambient temperature, and the heat storage time is further guaranteed. Accuracy without wasting energy.

Since steps S304 to S308 are the same as or similar to those in Embodiment 1, they will not be repeated here. Steps S301 to S303 are emphatically introduced below.

More preferably, the heat storage time may be calculated based on a fitting formula between the outdoor ambient temperature and the heat storage time. For example, use the following formula (1) to calculate the heat storage time:

t=k×Tao+b (1)

In formula (1), t represents the heat storage time, Tao is the outdoor ambient temperature, and k and b are constants, which can be obtained by fitting based on experimental data. For example, several experiments were performed on the heat storage time of the compressor for different outdoor ambient temperatures. In many experiments, set the air conditioner outlet air temperature to the same target temperature when the air conditioner enters the normal operation state, and make the compressor run at the same heat storage frequency, and judge that under different outdoor ambient temperatures, the air conditioner outlet air temperature reaches the same target temperature. The target temperature is the heat storage time required by the compressor, so as to establish a linear relationship between the compressor heat storage time and the outdoor ambient temperature.

Of course, the determination of the heat storage time may also be performed based on other relationships between the outdoor ambient temperature and the heat storage time, such as determination based on a fixed correspondence between the outdoor ambient temperature and the heat storage time. For example, a comparison table between the outdoor ambient temperature and the heat storage time is determined based on the heat storage test, the comparison table is stored in the air conditioner, and the heat storage time corresponding to the outdoor ambient temperature can be determined by using the comparison table.

The advantage of the above setting method is that since different outdoor ambient temperatures have a great influence on the heat storage capacity of the air conditioner, the heat storage time can be determined by using the fitting formula or the corresponding relationship between the outdoor ambient temperature and the heat storage time. On the basis of ensuring the accuracy of the actual start-up time, the accuracy of the heat storage time is further guaranteed to avoid excessive waste of energy.

Example 4

The fourth embodiment of the present invention will be described below with reference to FIG. 5 . 5 is a flowchart of a method for controlling heat storage of an air conditioner in a fourth embodiment of the present invention.

As shown in FIG. 5 , in a possible implementation manner, the main steps of the air conditioning heat storage control method include:

S401. Obtain the preset start-up time and outdoor ambient temperature of the air conditioner; for example, the preset start-up time may be the start-up time actively set by the user, or may be the start-up time based on statistics of historical start-up times of the air conditioner; the outdoor ambient temperature can be obtained through The temperature sensor installed in the outdoor unit is collected.

S402, correcting the preset power-on time based on the time correction parameter; after the preset power-on time is set by the user or calculated by the air conditioner, the power-on time is corrected based on the time correction parameter, for example, on the basis of the determined preset power-on time By modifying the preset power-on time by increasing or decreasing a time period, the corrected preset power-on time can be made closer to the real power-on time of the user. For example, if the preset power-on time is 18:00 and the time correction parameter is +10min, then the corrected preset power-on time is 18:00+10min=18:10.

S403. Determine the heat storage time of the air conditioner based on the outdoor ambient temperature; for example, after determining the outdoor ambient temperature, the cloud server calculates the heat storage time matching the outdoor ambient temperature based on the outdoor ambient temperature.

S404. Calculate the heat storage start time of the air conditioner based on the corrected preset power-on time and heat storage time; for example, after obtaining the corrected preset power-on time and heat storage time respectively, calculate the difference between the two to obtain the heat storage start time. Hot start time. For example, if the heat storage time is determined to be 5 minutes, and the preset start-up time is 18:10, the heat storage start time is 18:05.

S405. When the heat storage start time is reached, control the compressor to run at the first heat storage frequency. For example, after the cloud server calculates the heat storage start time, it sends an instruction to start heat storage to the air conditioner when the time reaches 18:05, and controls the compressor to run at a frequency lower than the rated operating frequency, such as the first heat storage The frequency is 50Hz. When the air conditioner operates in the heat storage mode, the compressor is controlled to run at 50Hz;

S406. Control the outdoor fan to run at the first heat storage speed at the same time as, before or after the compressor starts to run; for example, if the outdoor fan is a DC fan, the first heat storage speed may be 1000 r/min. At the same time, control the outdoor fan to start and run at the first heat storage speed of 1000r/min. Of course, the start timing of the outdoor fan can also be before or after the compressor starts to run, as long as the outdoor fan starts to run correspondingly when the compressor is running.

S407. During the operation of the compressor at the first heat storage frequency, detect the coil temperature of the indoor heat exchanger; for example, during the operation of the compressor at the first heat storage frequency, through A nearby temperature sensor detects the coil temperature of the indoor heat exchanger.

S408. Determine the size of the coil temperature and the first preset temperature; if the first preset temperature is 38°C, determine the detected coil temperature and the size of 38°C.

S409. Based on the judgment result, selectively adjust the rotational speed of the outdoor fan and/or the operating frequency of the compressor; for example, when the coil temperature is greater than 38°C, control the outdoor fan to reduce the rotational speed, and control the compressor to maintain the first heat storage frequency run; for another example, when the coil temperature is less than or equal to 38°C, the outdoor fan is controlled to run at the first heat storage speed and the compressor is controlled to run at the first heat storage frequency.

It can be seen from the above description that on the basis of Embodiment 1, by correcting the preset power-on time based on the time correction parameter, the control method of the present invention can correct the preset power-on time based on the user's power-on habits, so that the modified The preset power-on time of the air conditioner is closer to the actual power-on time of the user, so that the heat storage of the air conditioner based on the modified preset power-on time can avoid energy waste caused by insufficient heat storage time or too long heat storage time. To precise and personalized treatment for individual users, improve user experience. By determining the heat storage time of the air conditioner based on the outdoor ambient temperature, the heat storage time is corrected based on the outdoor ambient temperature, which further ensures the accuracy of the heat storage time and avoids wasting energy.

Since each implementation step in this implementation manner has been described in detail in Embodiments 1-3, it is not repeated in this embodiment.

Those skilled in the art can understand that the above air conditioner also includes some other well-known structures, such as processors, controllers, memories, etc., wherein the memories include but are not limited to random access memory, flash memory, read-only memory, programmable read-only memory, volatile memory, etc. volatile memory, non-volatile memory, serial memory, parallel memory or registers, etc., processors include but are not limited to CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. These well-known structures are not shown in the drawings in order to unnecessarily obscure the embodiments of the present disclosure.

It should be noted that although the detailed steps of the method of the present invention are described in detail above, those skilled in the art can combine, split and exchange the order of the above steps without departing from the basic principle of the present invention, so that The modified technical solution does not change the basic idea of the present invention, and therefore also falls within the protection scope of the present invention.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (9)

1. A heat storage control method for an air conditioner, the air conditioner comprises a compressor, a throttling element, an outdoor heat exchanger and an outdoor fan, an indoor heat exchanger and an indoor fan, and the outdoor fan is a direct current fan, and is characterized in that: The heat storage control method includes: obtaining the preset startup time and outdoor ambient temperature of the air conditioner; correcting the preset power-on time based on the time correction parameter; determining the heat storage time of the air conditioner based on the outdoor ambient temperature; calculating the heat storage start time of the air conditioner based on the revised preset power-on time and the heat storage time; When the heat storage start time is reached, controlling the compressor to operate at a first heat storage frequency; Controlling the outdoor fan to operate at a first thermal storage speed at the same time, before or after the compressor starts to operate; Detecting the coil temperature of the indoor heat exchanger during the operation of the compressor at the first heat storage frequency; Determine the size of the coil temperature and the first preset temperature; Based on the judgment result, selectively adjusting the rotational speed of the outdoor fan and/or the operating frequency of the compressor; The step of "selectively adjusting the rotational speed of the outdoor fan and/or the operating frequency of the compressor based on the judgment result" further includes: When the temperature of the coil is greater than the first preset temperature, controlling the compressor to operate at the first heat storage frequency, and controlling the outdoor fan to operate at a second heat storage speed; Wherein, the first heat storage speed is greater than the second heat storage speed; After the step of "controlling the compressor to maintain the first heat storage frequency and controlling the outdoor fan to operate at the second heat storage speed", the heat storage control method further includes: detecting the temperature of the coil; comparing the size of the coil temperature with the first preset temperature and the second preset temperature; selectively controlling the compressor to operate at a second heat storage frequency based on the comparison; Wherein, the first preset temperature is lower than the second preset temperature, and the first heat storage frequency is greater than the second heat storage frequency; "Based on the comparison, selectively controlling the compressor to operate at the second heat storage frequency" further comprises: When the coil temperature is greater than the second preset temperature, the compressor is controlled to operate at the second heat storage frequency. 2. The air-conditioning heat storage control method according to claim 1, wherein the step of "selectively adjusting the rotational speed of the outdoor fan and/or the operating frequency of the compressor based on the judgment result" further comprises: When the coil temperature is less than or equal to the first preset temperature, the compressor is controlled to maintain the first heat storage frequency to operate, and the outdoor fan is controlled to maintain the first heat storage rotational speed to operate. 3. The air conditioning heat storage control method according to claim 1, wherein the step of "selectively controlling the compressor to operate at the second heat storage frequency based on the comparison result" further comprises: When the coil temperature is less than or equal to the second preset temperature and greater than the first preset temperature, the compressor is controlled to maintain the operation of the first heat storage frequency. The heat storage control method for an air conditioner according to claim 1, wherein after the step of "controlling the compressor to operate at the second heat storage frequency", the heat storage control method further comprises: detecting the temperature of the coil; comparing the coil temperature with the first preset temperature and the second preset temperature; Based on the comparison result, the compressor is selectively controlled to operate at the second thermal storage frequency, and the outdoor fan is controlled to operate at the first thermal storage rotational speed. 5. The air conditioner heat storage control method according to claim 4, characterized in that "based on the comparison result, the compressor is selectively controlled to maintain the operation of the second heat storage frequency, and the outdoor fan is controlled so as to be The step of "running at the first heat storage speed" further includes: When the temperature of the coil is greater than the first preset temperature and less than or equal to the second preset temperature, the compressor is controlled to maintain the second heat storage frequency to operate, and the outdoor fan is controlled to operate at the specified temperature. running at the first heat storage speed; When the coil temperature is greater than the second preset temperature, the compressor is controlled to maintain the operation of the second heat storage frequency. The heat storage control method for an air conditioner according to claim 1 or 4, wherein the heat storage control method further comprises: When the coil temperature is less than or equal to the first preset temperature, the compressor is controlled to operate at the first thermal storage frequency, and the outdoor fan is controlled to operate at the first thermal storage rotational speed. 7 . The heat storage control method for an air conditioner according to claim 1 , wherein the time correction parameter is determined based on the preset start time and historical actual start time of the air conditioner during the last operation of the air conditioner. 8 . . 8. The heat storage control method for an air conditioner according to claim 7, characterized in that, "the time correction parameter is determined based on the preset start-up time and historical actual start-up time of the air conditioner during the last operation of the air conditioner within a set number of days. The" steps further include: Obtain the historical preset power-on time and historical actual power-on time within the set number of days; calculating the mean value of the historical preset power-on time and the mean value of the historical actual power-on time; calculating the first difference between the mean value of the historical actual power-on time and the mean value of the historical preset power-on time; The first difference value is determined as the time correction parameter. 9 . The air-conditioning heat storage control method according to claim 1 , wherein the step of “correcting the preset startup time based on a time correction parameter” further comprises: 10 . Calculate the sum between the preset power-on time and the time correction parameter.

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