阅读说明：本技术 改善空调器长时间达温停机的控制方法、装置及空调器 (Control method and device for improving long-time temperature-reaching shutdown of air conditioner and air conditioner ) 是由 鲍洋 黄春 陈东 于 2021-06-01 设计创作，主要内容包括：本发明提供了一种改善空调器长时间达温停机的控制方法、装置及空调器,该方法包括：获取室内环境温度；根据所述室内环境温度及设定温度,确定是否满足低负荷运行条件；若满足所述低负荷运行条件,则根据所述室内环境温度与所述设定温度增加目标过热度、目标过冷度。本发明在低负荷运行条件下可以根据室内环境温度与设定温度增加目标过热度、目标过冷度,从而延长空调运行时间,改善空调在低负荷运行时较长时间达温停机的情况,可以稳定室内环境,改善室内热舒适性。(The invention provides a control method and a control device for improving long-time temperature-reaching shutdown of an air conditioner and the air conditioner, wherein the method comprises the following steps: acquiring the indoor environment temperature; determining whether a low-load operation condition is met or not according to the indoor environment temperature and the set temperature; and if the low-load operation condition is met, increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature. The invention can increase the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature under the condition of low-load operation, thereby prolonging the operation time of the air conditioner, improving the condition that the air conditioner is stopped when the air conditioner is operated under low load for a long time reaching the temperature, stabilizing the indoor environment and improving the indoor thermal comfort.)

1. A control method for improving long-time temperature-reaching shutdown of an air conditioner is characterized by comprising the following steps:

acquiring the indoor environment temperature;

determining whether a low-load operation condition is met or not according to the indoor environment temperature and the set temperature;

and if the low-load operation condition is met, increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature.

2. The method of claim 1, wherein the air conditioner includes a first temperature sensor disposed at the return air and a second temperature sensor disposed within the line controller;

before the determining whether the low-load operation condition is satisfied according to the indoor ambient temperature and the set temperature, the method further includes:

acquiring a first environment temperature Tao1 at the shutdown time and a third environment temperature Tao3 at a preset time after shutdown, which are acquired by the first temperature sensor, and calculating a first temperature difference dTao1 between the first environment temperature Tao1 and the third environment temperature Tao 3;

acquiring a second ambient temperature Tao2 at the shutdown time and a fourth ambient temperature Tao4 at a preset time after shutdown, which are acquired by the second temperature sensor, and calculating a second temperature difference dTao2 between the second ambient temperature Tao2 and the fourth ambient temperature Tao 4;

if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1+ | (dTao1-dTao2)/2 |; if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1;

if the indoor environment temperature Tao is in a heating mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1- | (dTao1-dTao2)/2 |; and if the indoor environment is operated in a heating mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1.

3. The method of claim 1, wherein said determining whether a low load operating condition is met based on said indoor ambient temperature and a set point temperature comprises:

calculating the difference value between the indoor environment temperature and the set temperature in a plurality of continuous periods;

and if the average value of the difference values corresponding to each period is smaller than a preset temperature difference threshold value, determining that the low-load operation condition is met.

4. The method of claim 1, wherein said increasing a target superheat based on said indoor ambient temperature and said set temperature comprises:

in a refrigeration mode, if the indoor environment temperature is higher than the set temperature and is less than or equal to the sum of the set temperature and a preset temperature difference threshold value, controlling the target superheat degree to increase by a first value;

in a refrigeration mode, if the indoor environment temperature is less than or equal to the sum of the set temperature and a preset temperature difference threshold and is greater than the refrigeration shutdown temperature, controlling the target superheat degree to increase by a second value;

the second value is greater than the first value.

5. The method of claim 1, wherein increasing a target subcooling degree according to the indoor ambient temperature and the set temperature comprises:

in the heating mode, if the indoor environment temperature is greater than the difference between the set temperature and a preset temperature difference threshold and is less than or equal to the set temperature, controlling the target supercooling degree to increase by a third value;

in the heating mode, if the indoor environment temperature is greater than the set temperature and less than or equal to the heating shutdown temperature, controlling the target supercooling degree to increase by a fourth value;

the fourth value is greater than the third value.

6. The method of any of claims 1-5, wherein after said increasing a target superheat, target subcooling based on said indoor ambient temperature and said set temperature, the method further comprises:

and determining the opening degree of the expansion valve and adjusting the expansion valve to the opening degree according to the target superheat degree, the target supercooling degree, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the set temperature.

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

and if the low-load operation condition is not met, controlling to continue operating at the current target superheat degree and the target supercooling degree.

8. A control apparatus for improving long term warm-up shutdown of an air conditioner, the apparatus comprising:

the acquisition module is used for acquiring the indoor environment temperature;

the determining module is used for determining whether the low-load operation condition is met or not according to the indoor environment temperature and the set temperature;

and the adjusting module is used for increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature if the low-load operation condition is met.

9. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-7.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method and device for improving long-time temperature-reaching shutdown of an air conditioner and the air conditioner.

Background

Most of existing air conditioners regulate the flow of a refrigerant passing through an indoor unit by controlling the opening degree of an electronic expansion valve, so that the capacity of the indoor unit is changed: the larger the valve opening, the larger the heat exchange capacity of the indoor unit.

The air conditioner is generally provided with a quick cooling and heating function, and after the function is started, the opening degree of the electronic expansion valve is opened to enable the indoor environment temperature to reach the set temperature quickly. When the room temperature reaches the set temperature, the air conditioner starts low-load operation due to the reduction of the capacity requirement, and the air conditioner can quickly stop at the temperature if the air conditioner is controlled according to the original valve opening. Under this condition, if the improper temperature distribution that leads to of indoor air flow organization design for indoor temperature measurement is out of alignment, reaches to maintain the shutdown state for a long time after the warm shutdown and can't start, makes indoor thermal comfort poor.

Disclosure of Invention

The invention solves the problem that the existing air conditioner is stopped when running at low load and reaching the temperature for a long time.

In order to solve the above problems, the present invention provides a control method for improving long-time warm-up shutdown of an air conditioner, the method comprising: acquiring the indoor environment temperature; determining whether a low-load operation condition is met or not according to the indoor environment temperature and the set temperature; and if the low-load operation condition is met, increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature.

The invention can increase the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature under the condition of low-load operation, thereby prolonging the operation time of the air conditioner, improving the condition that the air conditioner is stopped when the air conditioner is operated under low load for a long time reaching the temperature, stabilizing the indoor environment and improving the indoor thermal comfort.

Optionally, the air conditioner comprises a first temperature sensor arranged at the return air and a second temperature sensor arranged in the wire controller; before the determining whether the low-load operation condition is satisfied according to the indoor ambient temperature and the set temperature, the method further includes: acquiring a first environment temperature Tao1 at the shutdown time and a third environment temperature Tao3 at a preset time after shutdown, which are acquired by the first temperature sensor, and calculating a first temperature difference dTao1 between the first environment temperature Tao1 and the third environment temperature Tao 3; acquiring a second ambient temperature Tao2 at the shutdown time and a fourth ambient temperature Tao4 at a preset time after shutdown, which are acquired by the second temperature sensor, and calculating a second temperature difference dTao2 between the second ambient temperature Tao2 and the fourth ambient temperature Tao 4; if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1+ | (dTao1-dTao2)/2 |; if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1; if the indoor environment temperature Tao is in a heating mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1- | (dTao1-dTao2)/2 |; and if the indoor environment is operated in a heating mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1.

The invention provides a correction process aiming at the indoor environment temperature, which can reduce the measurement error of the indoor environment temperature and improve the accuracy of determining whether the low-load operation condition is met, thereby accurately prolonging the operation time of the air conditioner.

Optionally, the determining whether a low load operation condition is met according to the indoor environment temperature and the set temperature includes: calculating the difference value between the indoor environment temperature and the set temperature in a plurality of continuous periods; and if the average value of the difference values corresponding to each period is smaller than a preset temperature difference threshold value, determining that the low-load operation condition is met.

The invention provides a specific mode for determining the condition meeting the low-load operation, and the accuracy of low-load operation judgment can be improved by calculating the mean value of a plurality of period difference values.

Optionally, the increasing the target degree of superheat according to the indoor ambient temperature and the set temperature includes: in a refrigeration mode, if the indoor environment temperature is higher than the set temperature and is less than or equal to the sum of the set temperature and a preset temperature difference threshold value, controlling the target superheat degree to increase by a first value; in a refrigeration mode, if the indoor environment temperature is less than or equal to the sum of the set temperature and a preset temperature difference threshold and is greater than the refrigeration shutdown temperature, controlling the target superheat degree to increase by a second value; the second value is greater than the first value.

The invention determines the adjustment range of the target superheat degree according to the indoor environment temperature, the set temperature and the shutdown temperature in the refrigeration mode, and can prolong the operation time of the air conditioner.

Optionally, the increasing the target supercooling degree according to the indoor ambient temperature and the set temperature includes: in the heating mode, if the indoor environment temperature is greater than the difference between the set temperature and a preset temperature difference threshold and is less than or equal to the set temperature, controlling the target supercooling degree to increase by a third value; in the heating mode, if the indoor environment temperature is greater than the set temperature and less than or equal to the heating shutdown temperature, controlling the target supercooling degree to increase by a fourth value; the fourth value is greater than the third value.

The invention determines the adjustment range of the target supercooling degree according to the indoor environment temperature, the set temperature and the shutdown temperature in the refrigeration mode, and can prolong the operation time of the air conditioner.

Optionally, after the increasing the target degree of superheat and the target degree of subcooling according to the indoor ambient temperature and the set temperature, the method further comprises: and determining the opening degree of the expansion valve and adjusting the expansion valve to the opening degree according to the target superheat degree, the target supercooling degree, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the set temperature.

The invention provides a calculation basis for the opening degree of the expansion valve, and the opening degree of the expansion valve can be reduced by increasing the target superheat degree and the target supercooling degree, so that the running time is increased, and the indoor thermal comfort is improved.

Optionally, the method further comprises: and if the low-load operation condition is not met, controlling to continue operating at the current target superheat degree and the target supercooling degree.

The invention continues to control by the original control logic when the low-load operation condition is not satisfied, thereby not influencing the quick cooling and quick heating functions of the air conditioner

The invention provides a control device for improving long-time temperature-reaching shutdown of an air conditioner, which comprises: the acquisition module is used for acquiring the indoor environment temperature; the determining module is used for determining whether the low-load operation condition is met or not according to the indoor environment temperature and the set temperature; and the adjusting module is used for increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature if the low-load operation condition is met.

The invention provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the method.

The present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is read and executed by a processor, the computer program implements the method.

The control device for improving the long-time temperature-reaching shutdown of the air conditioner, the air conditioner and the computer readable storage medium can achieve the same technical effect as the control method for improving the long-time temperature-reaching shutdown of the air conditioner.

Drawings

FIG. 1 is a schematic flow chart of a control method for improving long-term warm-up shutdown of an air conditioner in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a control device for improving long-time warm-up shutdown of an air conditioner in an embodiment of the invention.

Description of reference numerals:

201-an acquisition module; 202-a determination module; 203-adjusting module.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

The air conditioner shutdown at the temperature is mainly performed when the indoor environment temperature is close to the set temperature of the air conditioner (the requirement is low at the moment), and in order to solve the problem of shutdown at the temperature for a long time, different control methods can be distinguished according to different requirements of the air conditioner capacity, so that the reliability is improved. Under the condition that the difference between the indoor environment temperature and the set temperature of the air conditioner is small, the target superheat degree is adjusted to prolong the operation time, and the long-time temperature-reaching shutdown is avoided; the control is continuously carried out in the current mode under the condition that the difference between the indoor environment temperature and the set temperature of the air conditioner is large, at the moment, the requirement on the air conditioner capacity is large, the valve opening degree is large, and the temperature shutdown cannot be achieved.

Further considering that the temperature distribution is uneven due to improper design of indoor air airflow organization, the temperature of the indoor environment detected by the conventional single sensor cannot accurately reflect the temperature change of the indoor air according to the temperature detection scheme of the single sensor. In this embodiment, the air conditioner is provided with two sensors, and the detected indoor ambient temperature is corrected based on the time-by-time temperature difference after shutdown, so that the indoor air temperature can be reflected more truly.

Fig. 1 is a schematic flow chart of a control method for improving long-time warm-up shutdown of an air conditioner in one embodiment of the present invention, the method including:

s102, obtaining the indoor environment temperature.

In this embodiment, a first temperature sensor is provided at the return air of the air conditioner, and a second temperature sensor is provided in the line controller, and the indoor ambient temperature can be detected, but generally only a default temperature sensor set by the user is used, and the first temperature sensor is usually used as the default sensor, and the acquired indoor ambient temperature is Tao — Tao 1.

And S104, determining whether the low-load operation condition is met or not according to the indoor environment temperature and the set temperature.

Wherein, when the room temperature reaches the set temperature, the air conditioner can start low load operation due to the reduction of the capacity requirement. If the room temperature reaches the set temperature, the air conditioner still operates according to the previous opening degree of the high expansion valve, the air conditioner can be stopped at the high temperature within a short time, if the air flow organization in the room where the air conditioner is located is not properly designed, the temperature distribution in each place of the current room is uneven, namely the actual comfortable environment which is not expected by a user is not reached, the air conditioner operates according to the opening degree of the high expansion valve, the temperature reaching time is short, the air conditioner is stopped after reaching the high temperature, and due to the design problem of the air flow organization, the indoor environment temperature detected by the air conditioner does not meet the restarting condition for a long time, so that the long-time stop state maintenance cannot be started after reaching the high temperature stop, and the indoor comfort is poor.

After the temperature is reached and the shutdown is finished, if the system is restarted, the system only needs to run for a short time, and the shutdown condition can be met, and the running time is short, so that the user requirements cannot be effectively met.

Optionally, in order to improve the accuracy of low-load operation judgment, a mean value of difference values corresponding to indoor environment temperatures acquired in multiple cycles may be taken as a judgment basis. Based on this, it can be determined whether the low load operation condition is satisfied according to the following steps: firstly, calculating the difference value between the internal environment temperature of the chamber and a set temperature in a plurality of continuous periods; and then, if the average value of the difference values corresponding to each period is smaller than a preset temperature difference threshold value, determining that the low-load operation condition is met.

Calculating the average temperature difference delta T between the indoor environment temperature Tao and the set value Tset as Tao-Tset, and calculating the average temperature difference of n continuous periodsIf it is(preset temperature difference threshold value in cooling mode) or(preset temperature difference threshold value of heating mode), and controlling the target superheat degree or the target supercooling degree according to the following steps.

And S106, if the low-load operation condition is met, increasing the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature.

(1) In the cooling mode, the indoor ambient temperature Tao is greater than the set temperature Tset and is less than or equal to the sum of the set temperature Tset and the preset temperature difference threshold T1, that is, Tset < Tao ≦ T1+ Tset, the control target superheat degree Tmu is increased by the first value a, that is, the modified value Tmu' ═ Tmu + a.

(2) In the cooling mode, the indoor environment temperature Tao is smaller than or equal to the sum of the set temperature Tset and the preset temperature difference threshold value T1 and is larger than the cooling shutdown temperature Ttingji1, namely Ttingji1 is smaller than Tao and smaller than Tset, the control target superheat degree Tmu is increased by a second value b, namely the correction Tmu' -Tmu + b.

Wherein the second value b is greater than the first value a. In the case of the (1) th mode, in order to extend the operation time of the air conditioner before the air conditioner is warmed and stopped, the target superheat degree may be increased, the calculated valve opening degree is smaller than the current valve opening degree based on the calculation formula of the expansion valve opening degree, the air conditioner is operated with the reduced valve opening degree, and the operation time may be extended. In the case (2), the load is lower between the indoor ambient temperature during the cooling process to the set temperature and the shutdown temperature, as compared with the case (1), and therefore the magnitude of the increase in the target superheat degree is relatively larger, and accordingly, the magnitude of the decrease in the valve opening degree is also larger, thereby extending the operation time.

(3) In the heating mode, the indoor ambient temperature Tao is greater than the difference between the set temperature Tset and the preset temperature difference threshold T2 and is less than or equal to the set temperature Tset, that is, Tset-T2 < Tao ≦ Tset, the control target supercooling degree Tmu is increased by a third value aa, that is, Tmu' ═ Tmu + aa.

(4) In the heating mode, the indoor environment temperature Tao is greater than the set temperature Tset and is less than or equal to the heating shutdown temperature Ttingji2, i.e., Tset < Tao ≦ Ttingji2, the control target supercooling degree Tmu is increased by a fourth value bb, Tmu ″ -Tmu + bb.

Wherein the fourth value bb is greater than the third value aa. In the case of (3), in order to extend the operation time of the air conditioner before the warm-up and shutdown, the target supercooling degree may be increased, and the calculated valve opening degree is smaller than the current valve opening degree based on the calculation formula of the expansion valve opening degree, so that the operation is performed with the reduced valve opening degree, and the operation time may be extended. In the case (4), the load is lower in the heating process in which the indoor ambient temperature rises between the set temperature and the shutdown temperature, as compared with the case (3), and therefore the magnitude of the increase in the target supercooling degree is relatively larger, and accordingly, the magnitude of the decrease in the valve opening degree is also larger, thereby extending the operation time.

Alternatively, the opening degree of the expansion valve may be determined and adjusted to the opening degree according to the target superheat degree, the target supercooling degree, the evaporator inlet temperature, the evaporator outlet temperature, the preset temperature. The opening degree of the expansion valve is calculated according to the following formula: p ═ F (Te1, Te2, Tset, Tmu), where Te1 is the evaporator inlet temperature, Te2 is the evaporator outlet temperature, Tset is the set temperature, and Tmu is the target superheat degree or target subcooling degree, the specific formula may be the existing opening degree calculation formula, and this embodiment is not limited thereto.

And S108, if the low-load operation condition is not met, controlling to continue to operate according to the current target superheat degree and the target supercooling degree.

If the low-load operation condition is not met, the control is continued by the original control logic, so that the quick cooling and quick heating of the air conditioner are not influenced.

The control method for improving the long-time warm-up shutdown of the air conditioner can increase the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature under the low-load operation condition, so that the operation time of the air conditioner is prolonged, the condition that the air conditioner is in warm-up shutdown for a long time during low-load operation is improved, the indoor environment can be stabilized, and the indoor thermal comfort is improved.

Considering that there may be improper indoor air flow structure, which may easily cause uneven temperature distribution, and may cause inaccurate indoor temperature measurement, the present embodiment further provides a correction procedure for the indoor ambient temperature, which may reduce the measurement error of the indoor ambient temperature. On the basis, a first temperature sensor is arranged at the air return position of the air conditioner, and a second temperature sensor is arranged in the online controller; before determining whether the low load operation condition is satisfied according to the indoor ambient temperature and the set temperature, the method further includes the steps of:

firstly, a first ambient temperature Tao1 at the shutdown time and a third ambient temperature Tao3 at a preset time after shutdown, which are acquired by a first temperature sensor, are acquired, and a first temperature difference dTao1 between the first ambient temperature Tao1 and the third ambient temperature Tao3 is calculated.

Secondly, a second ambient temperature Tao2 at the shutdown time and a fourth ambient temperature Tao4 at a preset time after shutdown, which are acquired by the second temperature sensor, are acquired, and a second temperature difference dTao2 between the second ambient temperature Tao2 and the fourth ambient temperature Tao4 is calculated. The temperatures collected by the two sensors when the air conditioner is in a temperature-reaching shutdown state are used as reference temperatures, and the time-by-time temperature difference between the temperatures collected by the two sensors and the reference temperatures is calculated respectively. For example, the temperature difference between the ambient temperature and the reference temperature at the time of 5min shutdown is calculated, the temperature difference between the ambient temperature and the reference temperature at the time of 10min shutdown is calculated, and the temperature difference between the ambient temperature and the reference temperature at the time of 15min shutdown is calculated.

Then, if the air conditioner operates in the cooling mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao1+ | (dTao1-dTao2)/2 |; if the air conditioner operates in the cooling mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, the indoor ambient temperature Tao is corrected to Tao 1. In the cooling mode, if | dTao2| > | dTao1|, the temperature rising speed of the area near the return air is smaller than that of the area near the line controller, so that a larger deviation exists, Tao1 is lower than the actual indoor ambient temperature, and | is increased by (dTao1-dTao2)/2| on the basis of Tao 1; if the deviation is smaller than or equal to | dTao1| in | dTao2|, the ambient temperature acquired by the first temperature sensor can be directly adopted as the indoor ambient temperature, that is, the indoor ambient temperature is corrected to Tao 1.

If the air conditioner operates in the heating mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1- | (dTao1-dTao2)/2 |; if the air conditioner is operated in the heating mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, the indoor environment temperature Tao is corrected to Tao 1.

Similar to the cooling mode, if | dTao2| > | dTao1|, which indicates that the temperature decrease speed of the area near the return air is smaller than that of the area near the line controller, there is a large deviation, Tao1 is higher than the actual indoor ambient temperature, and | is decreased on the basis of Tao1 (dTao1-dTao2)/2 |; if the deviation is smaller than or equal to | dTao1| in | dTao2|, the ambient temperature acquired by the first temperature sensor can be directly adopted as the indoor ambient temperature, that is, the indoor ambient temperature is corrected to Tao 1.

The corrected value of the indoor environment temperature participates in the calculation of the valve opening when the air conditioner operates, resets during refrigeration oil return and resets during heating defrosting, can truly reflect the indoor air temperature, and can shorten the time of shutdown when reaching the temperature.

In order to solve the problem of long shutdown time when the temperature is reached, different control methods can be distinguished according to different air conditioner capacity requirements, and the reliability is improved, namely: when the temperature difference Tao-Tset between the indoor environment temperature and the set value is less than or equal to T1 (refrigeration) or Tset-Tao is less than or equal to T2 (heating), the control is carried out according to the mode A, and the exit is immediately carried out when the condition is not met; when other conditions are adopted, the control is carried out according to the mode B, the air conditioner has high capacity requirement, the valve opening is large, the machine can not be stopped when reaching the temperature, and the indoor quick cooling and quick heating are not influenced.

A control mode:

(1) calculating the temperature difference delta T between the ring temperature and a set value in each detection period delta T, and calculating the average temperature difference of n continuous periodsWhen in use(refrigeration) or(heating), judging that the machine is about to be stopped at the temperature, and entering a control mode A;

(2) normal operation valve opening P ═ F (Te1, Te2, Tset, Tmu), (Te1, Te2 are evaporator inlet and outlet temperatures, respectively, Tset is the set temperature, Tmu is the target superheat degree),

during refrigerating operation: if Tset is less than Tao and less than or equal to T1+ Tset, correcting Tmu' ═ Tmu + a; when Ttingji1 is more than Tao and less than Tset, the valve opening degree during low load operation is reduced and the operation time is prolonged by increasing the target superheat degree and correcting Tmu ″ -Tmu + b.

During heating operation: when Tset-T2 is more than Tao and less than Tset, correcting Tmu' ═ Tmu + aa; when Tset is less than Tao and less than Ttingji2, the valve opening degree during low load operation is reduced and the operation time is prolonged by increasing the target supercooling degree and correcting Tmu ″ -Tmu + bb.

B, control mode:

the valve opening is calculated according to the following formula: f (Te1, Te2, Tset, Tmu), (Te1, Te2 are the evaporator inlet and outlet temperatures, Tset is the set temperature, Tmu is the target superheat degree), and the high-flow operation achieves the effect of quick cooling/heating.

Optionally, entering the mode A to operate T1 and T2 at the temperature of 0.5 ℃, wherein the value range is [0.3,0.7 ]; the refrigeration target superheat degree correction a takes a value of 3 ℃, and the b takes a value of 5 ℃: the value range of a is [2,4], and the value range of b is [4,6 ]; the supercooling degree correction aa of the heating target takes 5 ℃ and the bb takes 7 ℃: aa is in the range of [4,6] and bb is in the range of [6,8 ]; refrigeration reaches the temperature of warm shutdown: tset-0.5, temperature to shutdown Start: tset + 1; heating to a temperature of shutdown: tset +1, warm shutdown start temperature: tset-1.

The method provided by the embodiment of the invention can be realized by utilizing the existing product without additionally adding parts, can obviously solve the problem that the air conditioner is not started for a long time when the air conditioner is in low-load operation, increases the operation time, improves the indoor thermal comfort and does not influence the quick cooling and quick heating functions of the air conditioner.

Fig. 2 is a schematic structural diagram of a control device for improving long-time warm-up shutdown of an air conditioner in an embodiment of the present invention, the device including:

an obtaining module 201, configured to obtain an indoor environment temperature;

a determining module 202, configured to determine whether a low-load operation condition is met according to the indoor environment temperature and a set temperature;

and the adjusting module 203 is configured to increase a target superheat degree and a target subcooling degree according to the indoor environment temperature and the set temperature if the low-load operation condition is met.

The control device for improving the long-time warm-up shutdown of the air conditioner can increase the target superheat degree and the target supercooling degree according to the indoor environment temperature and the set temperature under the low-load operation condition, thereby prolonging the operation time of the air conditioner, improving the condition that the air conditioner can be in warm shutdown for a long time when in low-load operation, stabilizing the indoor environment and improving the indoor thermal comfort.

Optionally, as an embodiment, the air conditioner includes a first temperature sensor disposed at the return air and a second temperature sensor disposed in the line controller; the apparatus also includes a temperature correction module to:

acquiring a first environment temperature Tao1 at the shutdown time and a third environment temperature Tao3 at a preset time after shutdown, which are acquired by the first temperature sensor, and calculating a first temperature difference dTao1 between the first environment temperature Tao1 and the third environment temperature Tao 3;

acquiring a second ambient temperature Tao2 at the shutdown time and a fourth ambient temperature Tao4 at a preset time after shutdown, which are acquired by the second temperature sensor, and calculating a second temperature difference dTao2 between the second ambient temperature Tao2 and the fourth ambient temperature Tao 4;

if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1+ | (dTao1-dTao2)/2 |; if the air conditioner operates in a cooling mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1;

if the indoor environment temperature Tao is in a heating mode and the absolute value of the first temperature difference dTao1 is smaller than the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao into Tao1- | (dTao1-dTao2)/2 |; and if the indoor environment is operated in a heating mode and the absolute value of the first temperature difference dTao1 is greater than or equal to the absolute value of the second temperature difference dTao2, correcting the indoor environment temperature Tao to Tao 1.

Optionally, as an embodiment, the determining module 202 is specifically configured to: calculating the difference value between the indoor environment temperature and the set temperature in a plurality of continuous periods; and if the average value of the difference values corresponding to each period is smaller than a preset temperature difference threshold value, determining that the low-load operation condition is met.

Optionally, as an embodiment, the adjusting module 203 is specifically configured to: in a refrigeration mode, if the indoor environment temperature is higher than the set temperature and is less than or equal to the sum of the set temperature and a preset temperature difference threshold value, controlling the target superheat degree to increase by a first value; in a refrigeration mode, if the indoor environment temperature is less than or equal to the sum of the set temperature and a preset temperature difference threshold and is greater than the refrigeration shutdown temperature, controlling the target superheat degree to increase by a second value; the second value is greater than the first value.

Optionally, as an embodiment, the adjusting module 203 is specifically configured to: in the heating mode, if the indoor environment temperature is greater than the difference between the set temperature and a preset temperature difference threshold and is less than or equal to the set temperature, controlling the target supercooling degree to increase by a third value; in the heating mode, if the indoor environment temperature is greater than the set temperature and less than or equal to the heating shutdown temperature, controlling the target supercooling degree to increase by a fourth value; the fourth value is greater than the third value.

Optionally, as an embodiment, the apparatus further includes an opening calculating module, configured to: and determining the opening degree of the expansion valve and adjusting the expansion valve to the opening degree according to the target superheat degree, the target supercooling degree, the inlet temperature of the evaporator, the outlet temperature of the evaporator and the set temperature.

Optionally, as an embodiment, the apparatus further includes a continuing operation module, configured to: and if the low-load operation condition is not met, controlling to continue operating at the current target superheat degree and the target supercooling degree.

The embodiment of the invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the control method for improving the long-time temperature-reaching shutdown of the air conditioner.

The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and run by a processor, the control method for improving the long-time temperature-reaching shutdown of the air conditioner provided by the embodiment is realized, the same technical effect can be achieved, and in order to avoid repetition, the description is omitted. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The control device for improving the long-time warm-up shutdown of the air conditioner and the air conditioner disclosed by the embodiment correspond to the control method for improving the long-time warm-up shutdown of the air conditioner disclosed by the embodiment, so that the description is relatively simple, and relevant points can be referred to the description of the method part.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.