CN108224676B

CN108224676B - Operation control method, operation control device, air conditioner, and readable storage medium

Info

Publication number: CN108224676B
Application number: CN201810008107.9A
Authority: CN
Inventors: 申孟亮
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2018-01-04
Filing date: 2018-01-04
Publication date: 2021-03-16
Anticipated expiration: 2038-01-04
Also published as: CN108224676A

Abstract

The invention provides an operation control method, an operation control device, an air conditioner and a readable storage medium, wherein the operation control method comprises the following steps: when detecting that the total energy requirement value of a plurality of indoor units in operation is greater than or equal to the capacity output limit value of the outdoor unit, detecting the indoor environment temperature corresponding to each indoor unit in operation; and controlling and adjusting the opening degree of an electronic expansion valve of the corresponding indoor unit and/or the operating parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature. Through the technical scheme of the invention, the controllability of each running indoor unit is enhanced, the possibility of shutdown of the outdoor unit caused by overlarge load is reduced, the running reliability of the system is further improved, and the use experience of a user is improved.

Description

Operation control method, operation control device, air conditioner, and readable storage medium

Technical Field

The invention relates to the technical field of air conditioner control, in particular to an operation control method, an operation control device, an air conditioner and a readable storage medium.

Background

In the related art, when one air conditioner outdoor unit is adopted to drag a plurality of air conditioner indoor units, the collocation of the capacity requirements of the air conditioner indoor units is not fixed, and some users can cause that the total capacity requirements of the air conditioner indoor units exceed the output capacity range of the outdoor units in the collocation process, so that the situations of insufficient refrigerant, overlarge load, oil shortage of compressors and the like can occur under the conditions of full opening of the air conditioner indoor units and severe working environment of the air conditioner system, the use reliability of the air conditioner system is reduced, and the user requirements cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, it is an object of the present invention to provide an operation control method.

Another object of the present invention is to provide an operation control device.

It is still another object of the present invention to provide an air conditioner.

It is yet another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided an operation control method including: when detecting that the total energy requirement value of a plurality of indoor units in operation is greater than or equal to the capacity output limit value of the outdoor unit, detecting the indoor environment temperature corresponding to each indoor unit in operation; and controlling and adjusting the opening degree of an electronic expansion valve of the corresponding indoor unit and/or the operating parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature.

According to the technical scheme, when the total energy requirement values of the indoor units are detected to be greater than or equal to the capacity output limit value of the outdoor unit, the indoor environment temperature corresponding to each indoor unit is detected, then the opening degree of the electronic expansion valve of each indoor unit and/or the operation parameters of the indoor fan are controlled and adjusted according to the environment temperature and the set temperature of each indoor unit, so that the total energy requirement values of the indoor units in operation after adjustment are lower than the output capacity limit value of the outdoor unit, stable operation of the outdoor unit is guaranteed, reliability of overall operation of the air conditioner is improved, the phenomenon of reduction of comfort performance caused by adjustment is reduced while the reliability of the overall operation of the air conditioner is protected, and user experience is improved.

Wherein, control regulation mode includes three at least, is respectively: and independently controlling and adjusting the opening and closing degree of the electronic expansion valve of each indoor unit, independently controlling and adjusting the operation parameters of each indoor fan, and simultaneously controlling and adjusting the opening and closing degree of the electronic expansion valve of each indoor unit and the operation parameters of each indoor fan.

The operation parameters of the indoor fan at least comprise an operation gear of the indoor fan and an operation rotating speed of the indoor fan.

It should be noted that the total power demand is a total cooling capacity demand, that is, a total cooling capacity demand, or is a total heating capacity demand, that is, a total heating capacity demand.

In any of the above technical solutions, preferably, the controlling and adjusting the opening/closing degree of the electronic expansion valve of the corresponding indoor unit according to the indoor ambient temperature and the corresponding set temperature includes: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a first preset threshold value or not; and when the difference is judged to be less than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed.

In the technical scheme, the size relation between the difference value between the indoor environment temperature detected by the indoor unit and the corresponding set temperature and the first preset threshold value is judged, namely whether the difference value between the indoor environment temperature and the set temperature is smaller or not is judged, when the difference value between the environment temperature and the set temperature is judged to be smaller than or equal to the first preset threshold value, the electronic expansion valve of the corresponding indoor unit is controlled to be closed, the capacity requirement value of the indoor unit is reduced, the overall total capacity requirement value is further reduced, the total capacity requirement value is favorably adjusted to be below the capacity output limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, and the stability and the reliability of the overall operation of the air conditioner are improved.

It should be noted that the value range of the first preset threshold is 1-3 ℃.

In any one of the above technical solutions, preferably, the method for controlling and adjusting the opening/closing degree of the electronic expansion valve corresponding to the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature further includes: when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than a first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold; and when the difference is judged to be less than or equal to the second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature.

In the technical scheme, when the difference value between the indoor environment temperature detected by the indoor unit and the set temperature set by the user is judged to be greater than a first preset threshold value and less than or equal to a second preset threshold value, the opening degree of the electronic expansion valve of the corresponding indoor unit is controlled to be reduced, the capacity requirement value of the indoor unit is reduced, the indoor unit is enabled to operate with smaller refrigerating capacity or heating capacity, on one hand, the total capacity requirement value is favorably regulated to be lower than the output capacity limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, the stability and the reliability of the overall operation of the air conditioner are improved, and on the other hand, the phenomenon that the comfort performance is reduced due to regulation is reduced.

It should be noted that the value range of the second preset threshold is 3.5-4.5 ℃.

In any one of the above technical solutions, preferably, the operation parameter includes an operation gear, and the operation parameter of the corresponding indoor fan is controlled and adjusted according to the indoor environment temperature and the corresponding set temperature, including: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; when the difference value is smaller than or equal to a third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear; and when detecting that the current running gear is not the lowest running gear, controlling the indoor fan to perform operation of reducing one running gear.

In the technical scheme, when the difference value between the indoor environment temperature and the set temperature is judged to be less than or equal to the third preset threshold value, whether the current operation gear of the corresponding indoor fan is the lowest operation gear is detected, namely whether the operation gear of the indoor fan can be further reduced is judged to reduce the corresponding capacity requirement value of the indoor unit, the operation of reducing one operation gear is executed by controlling the indoor fan, the operation rotating speed of the indoor fan is reduced, the capacity requirement value of the corresponding indoor unit is reduced, the total capacity requirement value is favorably adjusted to be below the capacity output limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, and the stability and the reliability of the integral operation of the air conditioner are improved.

It should be noted that the third preset threshold value ranges from 5 to 7 ℃.

In any one of the above technical solutions, preferably, the operation parameter includes an operation rotation speed, and the operation parameter of the corresponding indoor fan is controlled and adjusted according to the indoor environment temperature and the corresponding set temperature, including: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; when the difference is judged to be smaller than or equal to a third preset threshold value, detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is larger than the minimum running rotating speed or not; and when the current running rotating speed is detected to be greater than the minimum running rotating speed, the current running rotating speed of the fan in the control room is reduced by a preset rotating speed threshold value.

In the technical scheme, when the difference value between the indoor environment temperature and the set temperature is judged to be less than or equal to the third preset threshold value, whether the current running rotating speed of the corresponding indoor fan is the lowest running rotating speed is detected, namely whether the running rotating speed of the indoor fan can be further reduced is judged to reduce the corresponding capacity requirement value of the indoor unit, the running rotating speed of the indoor fan is reduced by controlling the rotating speed of the indoor fan to reduce the preset rotating speed threshold value, the corresponding capacity requirement value of the indoor unit is reduced, the total capacity requirement value is favorably adjusted to be below the capacity output limit value of the outdoor unit, the stable running of the outdoor unit is favorably ensured, and the stability and the reliability of the integral running of the air conditioner are improved.

It should be noted that the preset rotation speed threshold value may be selectively determined according to a rotation speed adjustment range of the indoor fan.

In any of the above technical solutions, preferably, the controlling and adjusting the opening/closing degree of the electronic expansion valve corresponding to the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature includes: when the difference value between the indoor environment temperature and the corresponding set temperature is larger than a third preset threshold value, determining that the indoor unit corresponding to the indoor environment temperature meets the condition; and when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any indoor unit to be closed.

In the technical scheme, whether the indoor unit corresponding to the indoor environment temperature meets the condition is determined by judging that the difference value between the indoor environment temperature and the set temperature is larger than a third preset threshold value, and when the indoor units in operation meet the condition, the total power demand value is reduced by controlling the electronic expansion valve of any indoor unit to be closed, the total power demand value is favorably adjusted to be below the output capacity limit value of the outdoor unit, the possibility that the outdoor unit is shut down due to overlarge capacity output is reduced, the stable operation of the outdoor unit is favorably ensured, and the stability and the reliability of the integral operation of the air conditioner are improved.

In any of the above technical solutions, preferably, before detecting an indoor ambient temperature corresponding to each operating indoor unit when a total energy demand value of the operating indoor units is greater than a capacity output limit value of the outdoor unit, the method further includes: determining total energy demand values of a plurality of indoor units in operation according to a preset period; and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

According to the technical scheme, the total energy demand values of the plurality of indoor units in operation are determined according to the preset period, the accuracy and the real-time performance of determining the total energy demand values are improved, whether the total energy demand values of the plurality of indoor units in operation are larger than the capacity output limit value or not is judged, timely adjustment is facilitated when the total energy demand values of the plurality of indoor units are judged to be larger than the capacity output limit value of the outdoor unit, and the stability and the reliability of the overall operation of the air conditioner are improved.

According to an aspect of the second aspect of the present invention, there is provided an operation control device including: the detecting unit is used for detecting the indoor environment temperature corresponding to each running indoor unit when detecting that the total energy demand value of the running indoor units is greater than or equal to the capacity output limit value of the outdoor unit; and the control unit is used for controlling and adjusting the opening degree of the electronic expansion valve of the corresponding indoor unit and/or the operating parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature.

In any of the above technical solutions, preferably, the method further includes: the judging unit is used for judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a first preset threshold value or not; the control unit is further configured to: and when the difference is judged to be less than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed.

In any one of the above technical solutions, preferably, the determining unit is further configured to: when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than a first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold; the control unit is further configured to: and when the difference is judged to be less than or equal to the second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature.

In any one of the above technical solutions, preferably, the determining unit is further configured to: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; the detection unit is further configured to: when the difference value is smaller than or equal to a third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear; the control unit is further configured to: and when detecting that the current running gear is not the lowest running gear, controlling the indoor fan to perform operation of reducing one running gear.

In any one of the above technical solutions, preferably, the determining unit is further configured to: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; the detection unit is further configured to: when the difference is judged to be smaller than or equal to a third preset threshold value, detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is larger than the minimum running rotating speed or not; the control unit is further configured to: and when the current running rotating speed is detected to be greater than the minimum running rotating speed, the current running rotating speed of the fan in the control room is reduced by a preset rotating speed threshold value.

In any of the above technical solutions, preferably, the method further includes: the determining unit is used for determining that the indoor unit corresponding to the indoor environment temperature meets the condition when the difference value between the indoor environment temperature and the corresponding set temperature is larger than a third preset threshold value; the control unit is further configured to: and when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any indoor unit to be closed.

In any of the above technical solutions, preferably, the determining unit is further configured to: determining total energy demand values of a plurality of indoor units in operation according to a preset period; the judging unit is further configured to: and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

According to a third aspect of the present invention, there is provided an air conditioner including the operation control device according to the second aspect of the present invention.

According to an aspect of the fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed, implements the operation control method as defined in the aspect of the first aspect.

Through the technical scheme, the possibility of outdoor unit faults caused by overlarge output capacity value of the outdoor unit is reduced, the running stability and reliability of the air conditioner are improved, and the user experience is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;

FIG. 2 shows a schematic block diagram of an operation control device according to an embodiment of the present invention;

FIG. 3 illustrates a schematic block diagram of an air conditioner according to an embodiment of the present invention;

fig. 4 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The first embodiment is as follows:

fig. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention.

As shown in fig. 1, an operation control method according to an embodiment of the present invention includes:

step S102, when detecting that the total energy demand value of a plurality of running indoor units is greater than or equal to the capacity output limit value of the outdoor unit, detecting the indoor environment temperature corresponding to each running indoor unit;

and step S104, controlling and adjusting the opening degree of the electronic expansion valve of the corresponding indoor unit and/or the operation parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature.

In the embodiment, when the total energy requirement values of the indoor units are detected to be greater than or equal to the outdoor unit capacity output limit value, the indoor environment temperature corresponding to each indoor unit is detected, and then the opening degree of the electronic expansion valve of each indoor unit and/or the operation parameters of the indoor fan are controlled and adjusted according to the environment temperature and the set temperature of each indoor unit, so that the total energy requirement values of the indoor units in operation after adjustment are lower than the outdoor unit output capacity limit value, stable operation of the outdoor unit is guaranteed, reliability of overall operation of the air conditioner is improved, the occurrence of a phenomenon of reduction of comfort performance caused by adjustment is reduced while the reliability of the overall operation of the air conditioner is protected, and user experience is improved.

In any of the above embodiments, preferably, the controlling and adjusting the opening and closing degree of the electronic expansion valve of the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature includes: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a first preset threshold value or not; and when the difference is judged to be less than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed.

In the embodiment, the magnitude relation between the difference between the indoor environment temperature detected by the indoor unit and the corresponding set temperature and the first preset threshold is judged, that is, whether the difference between the indoor environment temperature and the set temperature is smaller is judged, and when the difference between the environment temperature and the set temperature is judged to be smaller than or equal to the first preset threshold, the electronic expansion valve of the corresponding indoor unit is controlled to be closed, so that the capacity requirement value of the indoor unit is reduced, the overall total capacity requirement value is further reduced, the total capacity requirement value is favorably adjusted to be lower than the capacity output limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, and the stability and the reliability of the overall operation of the air conditioner are improved.

For example, in the indoor unit a, when the detected indoor ambient temperature is T1A and the set temperature is TSA, the difference TA between the two is T1A-TSA, and the first preset threshold is 3 ℃. And when the difference TA between the environment temperature and the set temperature is judged to be less than or equal to 3 ℃, controlling the electronic expansion valve of the indoor unit A to be closed.

In any of the above embodiments, preferably, the controlling and adjusting the opening and closing degree of the electronic expansion valve corresponding to the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature further includes: when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than a first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold; and when the difference is judged to be less than or equal to the second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature.

In this embodiment, when it is determined that the difference between the indoor ambient temperature detected by the indoor unit and the set temperature set by the user is greater than the first preset threshold and less than or equal to the second preset threshold, the opening degree of the electronic expansion valve of the corresponding indoor unit is controlled to be decreased, so that the capacity requirement value of the indoor unit is decreased, and the indoor unit operates with a smaller cooling capacity or heating capacity.

For example, when the indoor unit B is used to perform cooling, if the detected indoor ambient temperature is T1B and the set temperature is TSB, the difference TB between the two is T1B-TSB, the first preset threshold is 3 ℃, and the second preset threshold is 4 ℃. And when the temperature is judged to be more than 3 ℃ and less than or equal to TB and less than or equal to 4 ℃, under the condition of ensuring that the indoor unit B can carry out refrigeration, reducing the opening degree of an electronic expansion valve of the indoor unit B, reducing the required value of the refrigeration capacity of the indoor unit B, and adjusting the total required value of the capacity to be lower than the output capacity limit value of the outdoor unit.

In any of the above embodiments, preferably, the operation parameter includes an operation gear, and the controlling and adjusting of the operation parameter of the corresponding indoor fan according to the indoor ambient temperature and the corresponding set temperature includes: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; when the difference value is smaller than or equal to a third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear; and when detecting that the current running gear is not the lowest running gear, controlling the indoor fan to perform operation of reducing one running gear.

In this embodiment, when it is determined that the difference between the indoor ambient temperature and the set temperature is equal to or less than the third preset threshold, it is detected whether the current operating gear of the corresponding indoor fan is the lowest operating gear, that is, it is determined whether the operating gear of the indoor fan can be further reduced to reduce the capacity requirement value of the corresponding indoor unit, and the operation of reducing one operating gear is performed by controlling the indoor fan, so that the operating speed of the indoor fan is reduced, the capacity requirement value of the corresponding indoor unit is reduced, the total capacity requirement value is favorably adjusted to be below the capacity output limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, and the stability and reliability of the overall operation of the air conditioner are improved. It should be noted that the third preset threshold value ranges from 5 to 7 ℃.

For example, when the indoor unit C is used for cooling, the operation gear of the indoor fan is divided into 3 gears, when the detected indoor environment temperature is T1C and the set temperature is TSC, the difference TC between the two is T1C-TSC, the third preset threshold value is 5 ℃, and when the detected indoor environment temperature is not more than 5 ℃ and the current operation gear of the indoor fan C is 2 gears, the indoor fan C is controlled to adjust the current operation gear to 1 gear operation to reduce the required cooling capacity value of the indoor unit C and adjust the total required capacity value to be below the output capacity limit value of the outdoor unit.

For another example, when the indoor unit D is used for cooling, the operating range of the indoor fan is divided into 3 ranges, when the detected indoor ambient temperature is T1D and the set temperature is TSD, the difference TD between the two ranges is T1D-TSD, the third preset threshold value is 5 ℃, and when the TD is determined to be less than or equal to 5 ℃ and the current operating range of the indoor fan D is 2 ranges, the indoor fan D can be independently controlled to adjust the current operating range to 1 range for reducing the required cooling capacity value of the indoor unit D, and at the same time, the opening and closing degree of the electronic expansion valve corresponding to the indoor unit D can be controlled to reduce the required cooling capacity value of the indoor unit D, and the required cooling capacity value of the indoor unit D can be adjusted to be below the output capacity limit value of the outdoor unit.

In any of the above embodiments, preferably, the operation parameter includes an operation rotation speed, and the controlling and adjusting of the operation parameter of the corresponding indoor fan according to the indoor ambient temperature and the corresponding set temperature includes: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; when the difference is judged to be smaller than or equal to a third preset threshold value, detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is larger than the minimum running rotating speed or not; and when the current running rotating speed is detected to be greater than the minimum running rotating speed, the current running rotating speed of the fan in the control room is reduced by a preset rotating speed threshold value.

In this embodiment, when it is determined that the difference between the indoor ambient temperature and the set temperature is equal to or less than the third preset threshold, it is detected whether the current operating speed of the corresponding indoor fan is the lowest operating speed, that is, it is determined whether the operating speed of the indoor fan can be further reduced to reduce the capacity requirement value of the corresponding indoor unit, the operating speed of the indoor fan is reduced by controlling the indoor fan speed to reduce the preset speed threshold, the capacity requirement value of the corresponding indoor unit is reduced, the total capacity requirement value is favorably adjusted to be below the capacity output limit value of the outdoor unit, the stable operation of the outdoor unit is favorably ensured, and the stability and reliability of the overall operation of the air conditioner are improved. It should be noted that the preset rotation speed threshold value may be selectively determined according to a rotation speed adjustment range of the indoor fan.

For example, when the indoor unit E is used for cooling, the minimum operating speed of the indoor fan is 600 rpm, the preset speed threshold is 100 rpm, when the detected indoor ambient temperature is T1E and the set temperature is TSE, the difference TE between the two is T1E-TSE, the third preset threshold is 5 ℃, and when it is determined that TE is less than or equal to 5 ℃ and the current operating speed of the indoor fan E is 800 rpm, the indoor fan E may be controlled independently to adjust the operating speed to 700 rpm to reduce the required cooling capacity value of the indoor unit E, or simultaneously to reduce the opening degree of the electronic expansion valve corresponding to the indoor unit E, to further reduce the required cooling capacity value of the indoor unit, and to adjust the required cooling capacity value to be below the output capacity limit of the outdoor unit.

In any of the above embodiments, preferably, the controlling and adjusting the opening and closing degree of the electronic expansion valve corresponding to the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature includes: when the difference value between the indoor environment temperature and the corresponding set temperature is larger than a third preset threshold value, determining that the indoor unit corresponding to the indoor environment temperature meets the condition; and when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any indoor unit to be closed.

In the embodiment, whether the indoor unit corresponding to the indoor environment temperature meets the condition is determined by judging that the difference value between the indoor environment temperature and the set temperature is larger than a third preset threshold, and when the indoor units in operation meet the condition, the total power demand value is reduced by controlling the electronic expansion valve of any indoor unit to be closed, so that the total power demand value is favorably adjusted to be lower than the output capacity limit value of the outdoor unit, the possibility that the outdoor unit is shut down due to overlarge capacity output is reduced, the stable operation of the outdoor unit is favorably ensured, and the stability and the reliability of the overall operation of the air conditioner are improved.

In any of the above embodiments, preferably, before detecting the indoor ambient temperature corresponding to each operating indoor unit when the total power demand value of the operating indoor units is greater than the capacity output limit value of the outdoor unit, the method further includes: determining total energy demand values of a plurality of indoor units in operation according to a preset period; and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

In the embodiment, the total energy demand values of the plurality of indoor units in operation are determined according to the preset period, so that the determination accuracy and the real-time performance of the total energy demand values are improved, and the total energy demand values of the plurality of indoor units in operation are judged whether to be greater than the capacity output limit value or not, so that timely adjustment is facilitated when the total energy demand values of the plurality of indoor units are judged to be greater than the capacity output limit value of the outdoor unit, and the stability and the reliability of the overall operation of the air conditioner are improved.

Example two:

fig. 2 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.

As shown in fig. 2, an operation control device 200 according to an embodiment of the present invention includes: a detecting unit 202, configured to detect an indoor environment temperature corresponding to each operating indoor unit when detecting that a total energy demand value of the operating indoor units is greater than or equal to a capacity output limit value of the outdoor unit; and the control unit 204 is configured to control and adjust an opening degree of an electronic expansion valve of the corresponding indoor unit and/or an operation parameter of the indoor fan according to the indoor environment temperature and the corresponding set temperature.

In any of the above embodiments, preferably, the method further includes: a determining unit 206, configured to determine whether a difference between the indoor ambient temperature and the corresponding set temperature is less than or equal to a first preset threshold; the control unit 204 is further configured to: and when the difference is judged to be less than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed.

In any of the above embodiments, preferably, the judging unit 206 is further configured to: when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than a first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold; the control unit 204 is further configured to: and when the difference is judged to be less than or equal to the second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature.

In any of the above embodiments, preferably, the judging unit 206 is further configured to: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; the detection unit 202 is further configured to: when the difference value is smaller than or equal to a third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear; the control unit 204 is further configured to: and when detecting that the current running gear is not the lowest running gear, controlling the indoor fan to perform operation of reducing one running gear.

In any of the above embodiments, preferably, the judging unit 206 is further configured to: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not; the detection unit 202 is further configured to: when the difference is judged to be smaller than or equal to a third preset threshold value, detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is larger than the minimum running rotating speed or not; the control unit 204 is further configured to: and when the current running rotating speed is detected to be greater than the minimum running rotating speed, the current running rotating speed of the fan in the control room is reduced by a preset rotating speed threshold value.

In any of the above embodiments, preferably, the method further includes: a determining unit 208, configured to determine that an indoor unit corresponding to the indoor environment temperature satisfies a condition when a difference between the indoor environment temperature and the corresponding set temperature is greater than a third preset threshold; the control unit 204 is further configured to: and when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any indoor unit to be closed.

In any of the above embodiments, preferably, the determining unit 208 is further configured to: determining total energy demand values of a plurality of indoor units in operation according to a preset period; the determining unit 206 is further configured to: and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

Example three:

fig. 3 shows a schematic block diagram of an air conditioner according to an embodiment of the present invention.

As shown in fig. 3, an air conditioner 300 according to an embodiment of the present invention includes: the control device 200 is operated.

Example four:

As shown in fig. 4, an operation control method according to another embodiment of the present invention includes: step S402, judging whether the total energy requirement value of the indoor unit is greater than the capacity output limit value of the outdoor unit, if so, executing step S404, and if not, executing step S408; step S404, comparing the indoor environment temperature corresponding to each indoor unit with a set temperature; step S406, adjusting the opening degree and the running wind speed of the electronic expansion valve corresponding to the indoor fan according to the temperature comparison result; and step S408, the indoor unit operates according to the program.

Example five:

the total output limit value of the capacity of the outdoor unit of the air conditioner is 7200W, and the matching condition of the indoor units is as follows: the capacity requirement value of the X indoor unit is 2600W, the capacity requirement value of the Y indoor unit is 2600W, and the capacity requirement value of the Z indoor unit is 3500W. The three indoor units are simultaneously opened, the three indoor units respectively correspond to indoor environment temperatures T1X, T1Y and T1Z, the set temperatures TSX and TSZ are 30 ℃, 26 ℃ and 28 ℃, the total capacity requirement value of the indoor units of the air conditioner is 8700W and is larger than the outdoor unit capacity output limit value 7200W, the difference value between the indoor environment temperature and the set temperature of each indoor unit is calculated, the electronic expansion valve opening degree of the corresponding indoor unit X, Y is controlled to be unchanged, the operation gear of the corresponding indoor fan is reduced by one gear, the electronic expansion valve of the Z indoor unit is controlled to be closed, an air supply mode is executed, and the total capacity requirement value of the indoor unit is reduced.

The preset period is 3 minutes, namely the air device is repeatedly detected every 3 minutes, and the set temperature is unchanged. When the temperature of T1X is reduced to 28 ℃ and delta TX is 2 ℃ during secondary detection, the air conditioner controls the electronic expansion valve of the indoor unit A to be closed, and an air supply mode is used; when the temperature of T1Y is kept unchanged, and the delta TY is 3 ℃, controlling the opening of an electronic expansion valve of the Y indoor unit to be kept unchanged, and reducing the running windshield by one gear; when the temperature of T1Z rises to 34 ℃, and delta TZ is 6 ℃, the electronic expansion valve of the Z indoor unit is controlled to be adjusted to a target opening degree, and a target windshield is used.

Example six:

according to an embodiment of the present invention, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed, performs the steps of: when detecting that the total energy requirement value of a plurality of indoor units in operation is greater than or equal to the capacity output limit value of the outdoor unit, detecting the indoor environment temperature corresponding to each indoor unit in operation; and controlling and adjusting the opening degree of an electronic expansion valve of the corresponding indoor unit and/or the operating parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, and the present invention provides an operation control method, an operation control device, an air conditioner, and a computer-readable storage medium, wherein when it is detected that a total capacity demand value of a plurality of indoor units is greater than or equal to an outdoor unit capacity output limit value, an indoor environment temperature corresponding to each indoor unit is detected, and an opening degree of an electronic expansion valve and/or an operation parameter of an indoor fan of each indoor unit is controlled and adjusted according to the indoor environment temperature and a set temperature of each indoor unit, so that the total capacity demand value of the plurality of indoor units in operation after adjustment is controlled to be less than the outdoor unit output capacity limit value, and the occurrence of a phenomenon of a decrease in comfort performance due to adjustment is reduced while the reliability of the overall operation of the air conditioner is protected, thereby improving user experience.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An operation control method characterized by comprising:

when detecting that the total energy demand value of a plurality of indoor units in operation is greater than or equal to the capacity output limit value of the outdoor unit, detecting the indoor environment temperature corresponding to each indoor unit in operation;

controlling and adjusting the opening degree of an electronic expansion valve of the corresponding indoor unit and/or the operating parameters of an indoor fan according to the indoor environment temperature and the corresponding set temperature;

the controlling and adjusting the opening and closing degree of the electronic expansion valve of the corresponding indoor unit according to the indoor environment temperature and the corresponding set temperature comprises the following steps:

judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a first preset threshold value or not;

when the difference value is judged to be smaller than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed;

according to the indoor environment temperature and the corresponding set temperature, the opening and closing degree of the electronic expansion valve corresponding to the corresponding indoor unit is controlled and adjusted, and the method further comprises the following steps:

when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than the first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold;

when the difference is judged to be smaller than or equal to a second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature;

when the difference value between the indoor environment temperature and the corresponding set temperature is larger than a third preset threshold value, determining that the indoor unit corresponding to the indoor environment temperature meets the condition;

when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any one indoor unit to be closed;

the operation parameters comprise operation gears, and the operation parameters of the corresponding indoor fan are controlled and adjusted according to the indoor environment temperature and the corresponding set temperature, and the operation parameters comprise:

judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not;

when the difference value is judged to be smaller than or equal to the third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear;

and when detecting that the current operation gear is not the lowest operation gear, controlling the indoor fan to execute operation of reducing one operation gear.

2. The operation control method according to claim 1, wherein the operation parameters include an operation rotation speed, and the controlling and adjusting of the operation parameters of the corresponding indoor fan according to the indoor environment temperature and the corresponding set temperature includes:

when the difference value is smaller than or equal to the third preset threshold value, detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is larger than the minimum running rotating speed;

and when the current running rotating speed is detected to be greater than the minimum running rotating speed, controlling the current running rotating speed of the indoor fan to be reduced by a preset rotating speed threshold value.

3. The operation control method as claimed in claim 1 or 2, further comprising, before detecting the indoor ambient temperature corresponding to each of the indoor units in operation when the total capacity demand value of the indoor units in operation is greater than the capacity output limit value of the outdoor unit:

determining total energy demand values of the running indoor units according to a preset period;

and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

4. An operation control device characterized by comprising:

the detection unit is used for detecting the indoor environment temperature corresponding to each running indoor unit when detecting that the total energy requirement value of the running indoor units is greater than or equal to the capacity output limit value of the outdoor unit;

the control unit is used for controlling and adjusting the opening degree of the electronic expansion valve of the corresponding indoor unit and/or the operating parameters of the indoor fan according to the indoor environment temperature and the corresponding set temperature;

the determining unit is used for determining that the indoor unit corresponding to the indoor environment temperature meets the condition when the difference value between the indoor environment temperature and the corresponding set temperature is larger than a third preset threshold value;

the control unit is further configured to: when all the indoor units in operation are determined to meet the conditions, controlling the electronic expansion valve of any one indoor unit to be closed;

further comprising:

the judging unit is used for judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a first preset threshold value or not;

the control unit is further configured to: when the difference value is judged to be smaller than or equal to the first preset threshold value, controlling the electronic expansion valve corresponding to the indoor environment temperature to be closed;

the judging unit is further configured to: when the difference between the indoor environment temperature and the corresponding set temperature is judged to be larger than the first preset threshold, judging whether the difference is smaller than or equal to a second preset threshold;

the control unit is further configured to: when the difference is judged to be smaller than or equal to a second preset threshold value, controlling to reduce the opening degree of the electronic expansion valve corresponding to the indoor environment temperature;

the judging unit is further configured to: judging whether the difference value between the indoor environment temperature and the corresponding set temperature is smaller than or equal to a third preset threshold value or not;

the detection unit is further configured to: when the difference value is judged to be smaller than or equal to the third preset threshold value, detecting whether the current operation gear of the indoor fan corresponding to the indoor environment temperature is the lowest operation gear;

the control unit is further configured to: and when detecting that the current operation gear is not the lowest operation gear, controlling the indoor fan to execute operation of reducing one operation gear.

5. The operation control device according to claim 4,

the detection unit is used for detecting whether the current running rotating speed of the indoor fan corresponding to the indoor environment temperature is greater than the minimum running rotating speed or not when the difference value is judged to be less than or equal to the third preset threshold value;

the control unit is further configured to: and when the current running rotating speed is detected to be greater than the minimum running rotating speed, controlling the current running rotating speed of the indoor fan to be reduced by a preset rotating speed threshold value.

6. The operation control device according to claim 4 or 5,

the determination unit is further configured to: determining total energy demand values of the running indoor units according to a preset period;

the judging unit is further configured to: and judging whether the total capacity demand value of the plurality of indoor units in operation is greater than the capacity output limit value.

7. An air conditioner comprising a memory, a processor, and a computer program stored on the memory and executable on the processor,

the steps of implementing the operation control method according to any one of claims 1 to 3 when the processor executes the computer program;

and/or comprising an operation control device according to any one of claims 4 to 6.

8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the operation control method according to any one of claims 1 to 3.