CN108151249B - Operation control method, operation control device, air conditioner and computer readable storage medium - Google Patents
Operation control method, operation control device, air conditioner and computer readable storage medium Download PDFInfo
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- CN108151249B CN108151249B CN201711423981.0A CN201711423981A CN108151249B CN 108151249 B CN108151249 B CN 108151249B CN 201711423981 A CN201711423981 A CN 201711423981A CN 108151249 B CN108151249 B CN 108151249B
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Abstract
The invention provides an operation control method, an operation control device, an air conditioner and a computer readable storage medium, wherein the operation control method comprises the following steps: after the second type of indoor unit operates in a heating mode and reaches a preset time, determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit, and recording the temperature difference as the supercooling degree temperature difference; comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference according to a preset period; and adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation. According to the technical scheme, the refrigerant in the air conditioner can normally flow, the problem of accumulation of the refrigerant in the second type of indoor unit is solved, the accuracy and the reliability of opening and closing degree control of the electronic expansion valve are improved, the condition that the opening degree of the electronic expansion valve is too large or too small is effectively reduced, the running stability of the air conditioner is further improved, the heating energy efficiency of the air conditioner is improved, and the user experience is favorably improved.
Description
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 computer readable storage medium.
Background
The air conditioner can be operated by dragging a plurality of indoor units by one outdoor unit, is called as a multi-indoor air conditioner, not only saves the installation space of the outdoor unit, but also has the advantages of simple system installation, compact structure and comfort, each room can be independently adjusted and operated, and the requirements of different temperature control of each room can be met.
In the related art, the refrigerant distribution of the multi-split air conditioner is related to the stability of the operation of the whole system, each indoor unit is provided with a corresponding electronic expansion valve to control the flow rate of the refrigerant, and the opening degree of the electronic expansion valve is controlled and adjusted to meet the heat exchange requirements of each indoor unit.
However, in the operation process of the air conditioner with one outdoor unit, the electronic expansion valve corresponding to the unopened indoor unit needs to maintain a certain opening degree, and the heating performance of the opened indoor unit is affected by the size of the opening degree during shutdown, for example: when the opening degree is too small, a large amount of refrigerant is stored in the unopened internal machine, so that the system refrigerant is insufficient; when the opening degree is too large, heat is unloaded through the unopened inner machine, and heat waste is caused.
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.
Another object of the present invention is to provide an air conditioner.
It is 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 for a multi-split air conditioner including a plurality of indoor units and an outdoor unit, the indoor units in an operating state being denoted as first-type indoor units, and the indoor units in a shutdown state being denoted as second-type indoor units, the operation control method including: after the second type of indoor unit operates in a heating mode and reaches a preset time, determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit, and recording the temperature difference as the supercooling degree temperature difference; comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference according to a preset period; and adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, the supercooling degree temperature difference is determined by the temperature difference between the middle temperature and the outlet temperature of the indoor unit in the shutdown state, the opening and closing degree of the electronic expansion valve corresponding to the indoor unit in the shutdown state is adjusted according to the size relation between the supercooling degree temperature difference and the preset temperature difference, the refrigerant in the air conditioner can normally flow, the problem that the refrigerant is accumulated in the second-class indoor unit is solved, the accuracy and the reliability of the opening and closing degree control of the electronic expansion valve are improved, the condition that the opening and closing degree of the electronic expansion valve is too large or too small is effectively reduced, the running stability of the air conditioner is further improved, the heating energy efficiency of the air conditioner is improved, and the user experience is favorably improved.
In particular, the multi-split air conditioner includes a plurality of indoor units and an outdoor unit, and when the air conditioner is operated, the indoor machine in the running state is set as the first type of indoor machine, the indoor machine in the shutdown state is set as the second type of indoor machine, the opening and closing degree of the electronic expansion valve is adjusted by comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference, when the opening degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be smaller, the refrigerant in the second type indoor unit is difficult to flow out, at the moment, the opening degree of the corresponding electronic expansion valve is controlled to be increased, the refrigerant circulation speed can be improved, thereby improving the heating energy efficiency of the air conditioner, when the opening and closing degree of the electronic expansion valve corresponding to the second type of indoor unit is determined to be larger, the heat can be unloaded at the second type indoor unit, and at the moment, the opening and closing degree is controlled to be reduced, so that the waste of heat is reduced, and the energy-saving effect is achieved.
In any of the above technical solutions, preferably, the method further includes: and after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units.
In the technical scheme, when the number of the first type of indoor units is 1, the preset temperature difference value is determined through the middle temperature and the outlet temperature of the first type of indoor units, so that the calculation accuracy of the preset temperature difference value is favorably improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the method further includes: after detecting that the number of the first type of indoor units is more than 1, calculating the temperature difference between the middle temperature and the outlet temperature of any first type of indoor unit, and recording the temperature difference as a first supercooling degree temperature difference; and calculating the average value of all the first supercooling degree temperature differences, and determining the average value as a preset temperature difference value.
In the technical scheme, when the number of the first-class indoor units is detected to be more than 1, the temperature difference between the middle temperature and the outlet temperature of any first-class indoor unit is calculated and recorded as the first supercooling degree temperature difference, and the average value of all the first supercooling degree temperature differences is used as the preset temperature difference, so that the problem that the operating parameters of each indoor unit are different is fully considered, the calculation accuracy of the preset temperature difference is improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, adjusting the opening/closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship specifically includes: and when the supercooling temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to the first preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is larger than the preset temperature difference value, and the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be small, the refrigerant in the second type indoor unit is difficult to flow out, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is improved step by step according to the first preset adjustment quantity, the refrigerant circulation speed is favorably improved, the problem of liquid accumulation of the refrigerant in the second type indoor unit is reduced, and the heating energy efficiency of the air conditioner is improved.
In any of the above technical solutions, preferably, the first preset adjustment amount is 5 steps.
In the technical scheme, the first preset adjustment amount is set to 5 steps, so that the accuracy of adjusting the opening degree of the electronic expansion valve can be improved, the problem of frequent adjustment of the same electronic expansion valve is reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the adjusting the opening/closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship further includes: and when the supercooling degree temperature difference of any second type indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to a second preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is smaller than or equal to the preset temperature difference, the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be large, heat can be unloaded at the second type indoor unit, and the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to the second preset adjustment quantity, so that the heat waste is reduced, the heating effect of the air conditioner is improved, and the user experience is improved.
In any of the above technical solutions, preferably, the second preset adjustment amount is 5 steps.
In the technical scheme, the accuracy of adjusting the opening degree of the electronic expansion valve can be improved by setting the second preset adjustment amount to 5 steps.
In any of the above technical solutions, preferably, the preset time period is greater than or equal to 3 minutes.
In the technical scheme, when the air conditioner initially operates, the indoor environment temperature is low, the indoor environment temperature can be raised by setting the preset time length, and after the operation is preset for the preset time length, the middle temperature and the outlet temperature of the first-class indoor unit and the second-class indoor unit tend to be stable, the detection error is reduced, the accuracy and the reasonability of the adjustment and control of the opening degree of the electronic expansion valve are improved, and the improvement of user experience is facilitated.
In any of the above technical solutions, preferably, the method further includes: and presetting the opening degree of the electronic expansion valve of the second type of indoor unit to be 50 steps before the second type of indoor unit operates in the heating mode and the preset time length is not reached.
In the technical scheme, before the air conditioner operates in the heating mode and the preset time is not reached, the opening and closing degree of the electronic expansion valve of the second type of indoor unit is set to 50 steps, so that the problem that the refrigerant is accumulated in the second type of indoor unit can be reduced as much as possible, and the heating energy efficiency is improved.
In any of the above technical solutions, preferably, the method further includes: and controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, by setting the preset shutdown opening and closing degree range of the opening and closing degree of the electronic expansion valve of the second type indoor unit, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be small, the problem that the opening and closing degree is large due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, and similarly, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be large, the problem that the opening and closing degree is small due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, so that the problem that the electronic expansion valve is frequently adjusted is favorably reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the preset shutdown opening/closing degree range is 30 steps to 100 steps.
In the technical scheme, the preset shutdown opening-closing degree range is set to be between 30 steps and 100 steps, wherein the preset shutdown opening-closing degree range comprises 30 steps and 100 steps, which means that the adjustment range of the opening-closing degree of the electronic expansion valve of the second type of indoor unit is more accurate.
According to a second aspect of the present invention, there is provided an operation control device for a multi-split air conditioner including a plurality of indoor units and an outdoor unit, the indoor units in an operating state being referred to as first type indoor units, and the indoor units in a shutdown state being referred to as second type indoor units, the operation control device comprising: the determining unit is used for determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit after the second type of indoor unit operates in the heating mode and reaches a preset time length, and recording the temperature difference as the supercooling degree temperature difference; the comparison unit is used for comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference according to a preset period; and the adjusting unit is used for adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, the supercooling degree temperature difference is determined by the temperature difference between the middle temperature and the outlet temperature of the indoor unit in the shutdown state, the opening and closing degree of the electronic expansion valve corresponding to the indoor unit in the shutdown state is adjusted according to the size relation between the supercooling degree temperature difference and the preset temperature difference, the refrigerant in the air conditioner can normally flow, the problem that the refrigerant is accumulated in the second-class indoor unit is solved, the accuracy and the reliability of the opening and closing degree control of the electronic expansion valve are improved, the condition that the opening and closing degree of the electronic expansion valve is too large or too small is effectively reduced, the running stability of the air conditioner is further improved, the heating energy efficiency of the air conditioner is improved, and the user experience is favorably improved.
In particular, the multi-split air conditioner includes a plurality of indoor units and an outdoor unit, and when the air conditioner is operated, the indoor machine in the running state is set as the first type of indoor machine, the indoor machine in the shutdown state is set as the second type of indoor machine, the opening and closing degree of the electronic expansion valve is adjusted by comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference, when the opening degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be smaller, the refrigerant in the second type indoor unit is difficult to flow out, at the moment, the opening degree of the corresponding electronic expansion valve is controlled to be increased, the refrigerant circulation speed can be improved, thereby improving the heating energy efficiency of the air conditioner, when the opening and closing degree of the electronic expansion valve corresponding to the second type of indoor unit is determined to be larger, the heat can be unloaded at the second type indoor unit, and at the moment, the opening and closing degree is controlled to be reduced, so that the waste of heat is reduced, and the energy-saving effect is achieved.
In any of the above technical solutions, preferably, the determining unit is further configured to: and after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units.
In the technical scheme, when the number of the first type of indoor units is 1, the preset temperature difference value is determined through the middle temperature and the outlet temperature of the first type of indoor units, so that the calculation accuracy of the preset temperature difference value is favorably improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the method further includes: the calculating unit is used for calculating the temperature difference between the middle temperature and the outlet temperature of any first type of indoor unit after detecting that the number of the first type of indoor units is more than 1, and recording the temperature difference as a first supercooling degree temperature difference; the computing unit is further to: and calculating the average value of all the first supercooling degree temperature differences, and determining the average value as a preset temperature difference value.
In the technical scheme, when the number of the first-class indoor units is detected to be more than 1, the temperature difference between the middle temperature and the outlet temperature of any first-class indoor unit is calculated and recorded as the first supercooling degree temperature difference, and the average value of all the first supercooling degree temperature differences is used as the preset temperature difference, so that the problem that the operating parameters of each indoor unit are different is fully considered, the calculation accuracy of the preset temperature difference is improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the adjusting unit is further configured to: and when the supercooling temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to the first preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is larger than the preset temperature difference value, and the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be small, the refrigerant in the second type indoor unit is difficult to flow out, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is improved step by step according to the first preset adjustment quantity, the refrigerant circulation speed is favorably improved, the problem of liquid accumulation of the refrigerant in the second type indoor unit is reduced, and the heating energy efficiency of the air conditioner is improved.
In any of the above technical solutions, preferably, the first preset adjustment amount is 5 steps.
In the technical scheme, the first preset adjustment amount is set to 5 steps, so that the accuracy of adjusting the opening degree of the electronic expansion valve can be improved, the problem of frequent adjustment of the same electronic expansion valve is reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the adjusting unit is further configured to: and when the supercooling degree temperature difference of any second type indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to a second preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is smaller than or equal to the preset temperature difference, the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be large, heat can be unloaded at the second type indoor unit, and the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to the second preset adjustment quantity, so that the heat waste is reduced, the heating effect of the air conditioner is improved, and the user experience is improved.
In any of the above technical solutions, preferably, the second preset adjustment amount is 5 steps.
In the technical scheme, the accuracy of adjusting the opening degree of the electronic expansion valve can be improved by setting the second preset adjustment amount to 5 steps.
In any of the above technical solutions, preferably, the preset time period is greater than or equal to 3 minutes.
In the technical scheme, when the air conditioner initially operates, the indoor environment temperature is low, the indoor environment temperature can be raised by setting the preset time length, and after the operation is preset for the preset time length, the middle temperature and the outlet temperature of the first-class indoor unit and the second-class indoor unit tend to be stable, the detection error is reduced, the accuracy and the reasonability of the adjustment and control of the opening degree of the electronic expansion valve are improved, and the improvement of user experience is facilitated.
In any of the above technical solutions, preferably, the method further includes: and the presetting unit is used for presetting the opening degree of the electronic expansion valve of the second type indoor unit to be 50 steps before the second type indoor unit operates in the heating mode and the preset time length is not reached.
In the technical scheme, before the air conditioner operates in the heating mode and the preset time is not reached, the opening and closing degree of the electronic expansion valve of the second type of indoor unit is set to 50 steps, so that the problem that the refrigerant is accumulated in the second type of indoor unit can be reduced as much as possible, and the heating energy efficiency is improved.
In any of the above technical solutions, preferably, the adjusting unit is further configured to: and controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, by setting the preset shutdown opening and closing degree range of the opening and closing degree of the electronic expansion valve of the second type indoor unit, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be small, the problem that the opening and closing degree is large due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, and similarly, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be large, the problem that the opening and closing degree is small due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, so that the problem that the electronic expansion valve is frequently adjusted is favorably reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the preset shutdown opening/closing degree range is 30 steps to 100 steps.
In the technical scheme, the preset shutdown opening-closing degree range is set to be between 30 steps and 100 steps, wherein the preset shutdown opening-closing degree range comprises 30 steps and 100 steps, which means that the adjustment range of the opening-closing degree of the electronic expansion valve of the second type of indoor unit is more accurate.
According to a third aspect of the present invention, there is provided an air conditioner, comprising a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the operation control method according to any one of the above aspects when executing the computer program; and/or an operation control device including any one of the above technical solutions.
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 executed to implement the operation control method according to the first aspect.
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.
An operation control scheme according to an embodiment of the present invention will be specifically described below with reference to fig. 1 to 4.
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, after the indoor unit operates in a heating mode and reaches a preset time, determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit, and recording the temperature difference as supercooling degree temperature difference; step S104, comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference according to a preset period; and step S106, adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, the supercooling degree temperature difference is determined by the temperature difference between the middle temperature and the outlet temperature of the indoor unit in the shutdown state, the opening and closing degree of the electronic expansion valve corresponding to the indoor unit in the shutdown state is adjusted according to the size relation between the supercooling degree temperature difference and the preset temperature difference, the refrigerant in the air conditioner can normally flow, the problem that the refrigerant is accumulated in the second-class indoor unit is solved, the accuracy and the reliability of the opening and closing degree control of the electronic expansion valve are improved, the condition that the opening and closing degree of the electronic expansion valve is too large or too small is effectively reduced, the running stability of the air conditioner is further improved, the heating energy efficiency of the air conditioner is improved, and the user experience is favorably improved.
In particular, the multi-split air conditioner includes a plurality of indoor units and an outdoor unit, and when the air conditioner is operated, the indoor machine in the running state is set as the first type of indoor machine, the indoor machine in the shutdown state is set as the second type of indoor machine, the opening and closing degree of the electronic expansion valve is adjusted by comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference, when the opening degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be smaller, the refrigerant in the second type indoor unit is difficult to flow out, at the moment, the opening degree of the corresponding electronic expansion valve is controlled to be increased, the refrigerant circulation speed can be improved, thereby improving the heating energy efficiency of the air conditioner, when the opening and closing degree of the electronic expansion valve corresponding to the second type of indoor unit is determined to be larger, the heat can be unloaded at the second type indoor unit, and at the moment, the opening and closing degree is controlled to be reduced, so that the waste of heat is reduced, and the energy-saving effect is achieved.
In any of the above technical solutions, preferably, the method further includes: and after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units.
In the technical scheme, when the number of the first type of indoor units is 1, the preset temperature difference value is determined through the middle temperature and the outlet temperature of the first type of indoor units, so that the calculation accuracy of the preset temperature difference value is favorably improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the method further includes: after detecting that the number of the first type of indoor units is more than 1, calculating the temperature difference between the middle temperature and the outlet temperature of any first type of indoor unit, and recording the temperature difference as a first supercooling degree temperature difference; and calculating the average value of all the first supercooling degree temperature differences, and determining the average value as a preset temperature difference value.
In the technical scheme, when the number of the first-class indoor units is detected to be more than 1, the temperature difference between the middle temperature and the outlet temperature of any first-class indoor unit is calculated and recorded as the first supercooling degree temperature difference, and the average value of all the first supercooling degree temperature differences is used as the preset temperature difference, so that the problem that the operating parameters of each indoor unit are different is fully considered, the calculation accuracy of the preset temperature difference is improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, adjusting the opening/closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship specifically includes: and when the supercooling temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to the first preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is larger than the preset temperature difference value, and the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be small, the refrigerant in the second type indoor unit is difficult to flow out, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is improved step by step according to the first preset adjustment quantity, the refrigerant circulation speed is favorably improved, the problem of liquid accumulation of the refrigerant in the second type indoor unit is reduced, and the heating energy efficiency of the air conditioner is improved.
In any of the above technical solutions, preferably, the first preset adjustment amount is 5 steps.
In the technical scheme, the first preset adjustment amount is set to 5 steps, so that the accuracy of adjusting the opening degree of the electronic expansion valve can be improved, the problem of frequent adjustment of the same electronic expansion valve is reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the adjusting the opening/closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship further includes: and when the supercooling degree temperature difference of any second type indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to a second preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is smaller than or equal to the preset temperature difference, the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be large, heat can be unloaded at the second type indoor unit, and the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to the second preset adjustment quantity, so that the heat waste is reduced, the heating effect of the air conditioner is improved, and the user experience is improved.
In any of the above technical solutions, preferably, the second preset adjustment amount is 5 steps.
In the technical scheme, the accuracy of adjusting the opening degree of the electronic expansion valve can be improved by setting the second preset adjustment amount to 5 steps.
In any of the above technical solutions, preferably, the preset time period is greater than or equal to 3 minutes.
In the technical scheme, when the air conditioner initially operates, the indoor environment temperature is low, the indoor environment temperature can be raised by setting the preset time length, and after the operation is preset for the preset time length, the middle temperature and the outlet temperature of the first-class indoor unit and the second-class indoor unit tend to be stable, the detection error is reduced, the accuracy and the reasonability of the adjustment and control of the opening degree of the electronic expansion valve are improved, and the improvement of user experience is facilitated.
Specifically, the preset time period may be set to 3 minutes.
In any of the above technical solutions, preferably, the method further includes: and presetting the opening degree of the electronic expansion valve of the second type of indoor unit to be 50 steps before the second type of indoor unit operates in the heating mode and the preset time length is not reached.
In the technical scheme, before the air conditioner operates in the heating mode and the preset time is not reached, the opening and closing degree of the electronic expansion valve of the second type of indoor unit is set to 50 steps, so that the problem that the refrigerant is accumulated in the second type of indoor unit can be reduced as much as possible, and the heating energy efficiency is improved.
In any of the above technical solutions, preferably, the method further includes: and controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, by setting the preset shutdown opening and closing degree range of the opening and closing degree of the electronic expansion valve of the second type indoor unit, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be small, the problem that the opening and closing degree is large due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, and similarly, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be large, the problem that the opening and closing degree is small due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, so that the problem that the electronic expansion valve is frequently adjusted is favorably reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the preset shutdown opening/closing degree range is 30 steps to 100 steps.
In the technical scheme, the preset shutdown opening-closing degree range is set to be between 30 steps and 100 steps, wherein the preset shutdown opening-closing degree range comprises 30 steps and 100 steps, which means that the adjustment range of the opening-closing degree of the electronic expansion valve of the second type of indoor unit is more accurate.
Specifically, the closing opening degree is set to an opening degree interval [ Pmin, Pmax ], the closing opening degree cannot exceed the opening degree interval in the adjustment process, Pmin can take 30 steps, and Pmax can take 100 steps.
Fig. 2 shows a schematic block diagram of an operation control device 200 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 is applicable to a multi-split air conditioner including a plurality of indoor units and an outdoor unit, the indoor unit in an operating state is referred to as a first type of indoor unit, and the indoor unit in a shutdown state is referred to as a second type of indoor unit, and the operation control device 200 includes: the determining unit 202 is configured to determine a temperature difference between a middle temperature and an outlet temperature of the second type of indoor unit after the second type of indoor unit operates in the heating mode and reaches a preset time period, and record the temperature difference as a supercooling degree temperature difference; the comparison unit 204 is used for comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference according to a preset period; and an adjusting unit 206, configured to adjust an opening degree of an electronic expansion valve of the second type indoor unit according to the size relationship.
In the technical scheme, the supercooling degree temperature difference is determined by the temperature difference between the middle temperature and the outlet temperature of the indoor unit in the shutdown state, the opening and closing degree of the electronic expansion valve corresponding to the indoor unit in the shutdown state is adjusted according to the size relation between the supercooling degree temperature difference and the preset temperature difference, the refrigerant in the air conditioner can normally flow, the problem that the refrigerant is accumulated in the second-class indoor unit is solved, the accuracy and the reliability of the opening and closing degree control of the electronic expansion valve are improved, the condition that the opening and closing degree of the electronic expansion valve is too large or too small is effectively reduced, the running stability of the air conditioner is further improved, the heating energy efficiency of the air conditioner is improved, and the user experience is favorably improved.
In particular, the multi-split air conditioner includes a plurality of indoor units and an outdoor unit, and when the air conditioner is operated, the indoor machine in the running state is set as the first type of indoor machine, the indoor machine in the shutdown state is set as the second type of indoor machine, the opening and closing degree of the electronic expansion valve is adjusted by comparing the magnitude relation between the supercooling degree temperature difference and the preset temperature difference, when the opening degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be smaller, the refrigerant in the second type indoor unit is difficult to flow out, at the moment, the opening degree of the corresponding electronic expansion valve is controlled to be increased, the refrigerant circulation speed can be improved, thereby improving the heating energy efficiency of the air conditioner, when the opening and closing degree of the electronic expansion valve corresponding to the second type of indoor unit is determined to be larger, the heat can be unloaded at the second type indoor unit, and at the moment, the opening and closing degree is controlled to be reduced, so that the waste of heat is reduced, and the energy-saving effect is achieved.
In any of the above technical solutions, preferably, the determining unit 202 is further configured to: and after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units.
In the technical scheme, when the number of the first type of indoor units is 1, the preset temperature difference value is determined through the middle temperature and the outlet temperature of the first type of indoor units, so that the calculation accuracy of the preset temperature difference value is favorably improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the method further includes: the calculating unit 208 is used for calculating the temperature difference between the middle temperature and the outlet temperature of any first type of indoor unit after detecting that the number of the first type of indoor units is more than 1, and recording the temperature difference as a first supercooling degree temperature difference; the computing unit 208 is further configured to: and calculating the average value of all the first supercooling degree temperature differences, and determining the average value as a preset temperature difference value.
In the technical scheme, when the number of the first-class indoor units is detected to be more than 1, the temperature difference between the middle temperature and the outlet temperature of any first-class indoor unit is calculated and recorded as the first supercooling degree temperature difference, and the average value of all the first supercooling degree temperature differences is used as the preset temperature difference, so that the problem that the operating parameters of each indoor unit are different is fully considered, the calculation accuracy of the preset temperature difference is improved, and the reasonability and the accuracy of the control of the opening degree of the electronic expansion valve are further improved.
In any of the above technical solutions, preferably, the adjusting unit 206 is further configured to: and when the supercooling temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to the first preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is larger than the preset temperature difference value, and the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be small, the refrigerant in the second type indoor unit is difficult to flow out, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is improved step by step according to the first preset adjustment quantity, the refrigerant circulation speed is favorably improved, the problem of liquid accumulation of the refrigerant in the second type indoor unit is reduced, and the heating energy efficiency of the air conditioner is improved.
In any of the above technical solutions, preferably, the first preset adjustment amount is 5 steps.
In the technical scheme, the first preset adjustment amount is set to 5 steps, so that the accuracy of adjusting the opening degree of the electronic expansion valve can be improved, the problem of frequent adjustment of the same electronic expansion valve is reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the adjusting unit 206 is further configured to: and when the supercooling degree temperature difference of any second type indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to a second preset adjustment quantity.
In the technical scheme, when the supercooling degree temperature difference of any second type indoor unit is smaller than or equal to the preset temperature difference, the opening and closing degree of the electronic expansion valve corresponding to the second type indoor unit is determined to be large, heat can be unloaded at the second type indoor unit, and the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is reduced step by step according to the second preset adjustment quantity, so that the heat waste is reduced, the heating effect of the air conditioner is improved, and the user experience is improved.
In any of the above technical solutions, preferably, the second preset adjustment amount is 5 steps.
In the technical scheme, the accuracy of adjusting the opening degree of the electronic expansion valve can be improved by setting the second preset adjustment amount to 5 steps.
In any of the above technical solutions, preferably, the preset time period is greater than or equal to 3 minutes.
In the technical scheme, when the air conditioner initially operates, the indoor environment temperature is low, the indoor environment temperature can be raised by setting the preset time length, and after the operation is preset for the preset time length, the middle temperature and the outlet temperature of the first-class indoor unit and the second-class indoor unit tend to be stable, the detection error is reduced, the accuracy and the reasonability of the adjustment and control of the opening degree of the electronic expansion valve are improved, and the improvement of user experience is facilitated.
Specifically, the preset time period may be set to 3 minutes.
In any of the above technical solutions, preferably, the method further includes: the presetting unit 210 is configured to preset the opening degree of the electronic expansion valve of the second type indoor unit to 50 steps before the second type indoor unit operates in the heating mode and the preset duration is not reached.
In the technical scheme, before the air conditioner operates in the heating mode and the preset time is not reached, the opening and closing degree of the electronic expansion valve of the second type of indoor unit is set to 50 steps, so that the problem that the refrigerant is accumulated in the second type of indoor unit can be reduced as much as possible, and the heating energy efficiency is improved.
In any of the above technical solutions, preferably, the adjusting unit 206 is further configured to: and controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation.
In the technical scheme, by setting the preset shutdown opening and closing degree range of the opening and closing degree of the electronic expansion valve of the second type indoor unit, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be small, the problem that the opening and closing degree is large due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, and similarly, when the opening and closing degree of the electronic expansion valve of the second type indoor unit is determined to be large, the problem that the opening and closing degree is small due to adjustment of the opening and closing degree of the electronic expansion valve can be reduced, so that the problem that the electronic expansion valve is frequently adjusted is favorably reduced, the service life of the electronic expansion valve is prolonged, and the user experience is improved.
In any of the above technical solutions, preferably, the preset shutdown opening/closing degree range is 30 steps to 100 steps.
In the technical scheme, the preset shutdown opening-closing degree range is set to be between 30 steps and 100 steps, wherein the preset shutdown opening-closing degree range comprises 30 steps and 100 steps, which means that the adjustment range of the opening-closing degree of the electronic expansion valve of the second type of indoor unit is more accurate.
Specifically, the closing opening degree is set to an opening degree interval [ Pmin, Pmax ], the closing opening degree cannot exceed the opening degree interval in the adjustment process, Pmin can take 30 steps, and Pmax can take 100 steps.
The determining unit 202, the comparing unit 204, the adjusting unit 206, and the calculating unit 208 may be a CPU, an MCU, a single chip, an embedded device, and the like of the operation control apparatus 200, and the presetting unit 210 may be a memory.
Fig. 3 shows a schematic block diagram of an air conditioner 300 according to an embodiment of the present invention.
As shown in fig. 3, according to an air conditioner 300 of an embodiment of the present invention, the air conditioner 300 includes a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor implements the steps of the operation control method according to any one of the above embodiments when executing the computer program; and/or include an operation control device 200 as shown in fig. 2.
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, implements the steps of the operation control method described above.
Fig. 4 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.
As shown in fig. 4, the operation control method according to the embodiment of the present invention includes: step S402, receiving indoor machine signals; step S404, judging whether the air conditioner is in a heating mode, if so, executing step S406, otherwise, executing step S402; step S406, after the operation is carried out for a preset time, the opening degree of the electronic expansion valve corresponding to the unopened indoor unit is adjusted to be P1, and the step P1 can be set to be 50; step S408, after the interval tm time, comparing the interval tm time, and comparing the delta Ti and the delta T; and S410, if delta Ti is less than or equal to delta T, reducing the opening degree of the corresponding stopped indoor unit by delta P, and if delta Ti is greater than delta T, increasing the opening degree of the corresponding stopped indoor unit by delta P, wherein tm can be set to be 3 minutes, and delta P can be set to be 5 steps.
In this embodiment, when a signal for operating the indoor unit is received, after the air conditioner is determined to be in the heating mode, the opening and closing degree of the electronic expansion valve is adjusted by comparing the magnitude relationship between the supercooling degree temperature difference Δ Ti and the preset temperature difference Δ T, when it is determined that the opening and closing degree of the electronic expansion valve corresponding to the unopened indoor unit is small, the refrigerant in the unopened indoor unit is difficult to flow out, at this time, the opening and closing degree of the corresponding electronic expansion valve is controlled to be increased, the refrigerant circulation speed can be increased, and thus, the heating energy efficiency of the air conditioner is improved, when it is determined that the opening and closing degree of the electronic expansion valve corresponding to the second type of indoor unit is large, heat can be unloaded at the second type of indoor unit, at this time, the opening and closing degree is controlled to be reduced, and energy saving effect is.
The technical scheme of the invention is explained in detail by combining the attached drawings, and the invention provides an operation control method, an operation control device, an air conditioner and a computer readable storage medium.
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 (14)
1. An operation control method is suitable for a multi-split air conditioner, the multi-split air conditioner comprises a plurality of indoor units and an outdoor unit, the indoor unit in an operating state is marked as a first type indoor unit, the indoor unit in a shutdown state is marked as a second type indoor unit, and the operation control method comprises the following steps:
after the second type of indoor unit operates in a heating mode and reaches a preset time, determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit, and recording the temperature difference as the supercooling degree temperature difference;
comparing the magnitude relation between the supercooling degree temperature difference and a preset temperature difference value according to a preset period;
adjusting the opening and closing degree of an electronic expansion valve of the second type indoor unit according to the size relationship;
further comprising:
after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units;
after detecting that the number of the first type of indoor units is more than 1, calculating the temperature difference between the middle temperature and the outlet temperature of any one first type of indoor unit, and recording the temperature difference as a first supercooling degree temperature difference;
calculating the average value of all the first supercooling degree temperature differences, and determining the average value as the preset temperature difference value;
further comprising:
controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation;
adjusting the opening and closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship, specifically comprising:
when the supercooling degree temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to a first preset adjustment quantity;
adjusting the opening and closing degree of an electronic expansion valve of the second type indoor unit according to the size relationship, and specifically, the method further comprises the following steps:
and when the supercooling degree temperature difference of any second type of indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type of indoor unit is reduced step by step according to a second preset adjustment quantity.
2. The operation control method according to claim 1,
the first preset adjustment amount is 5 steps.
3. The operation control method according to claim 1,
the second preset adjustment amount is 5 steps.
4. The operation control method according to any one of claims 1 to 3,
the preset time is greater than or equal to 3 minutes.
5. The operation control method according to any one of claims 1 to 3, characterized by further comprising:
and presetting the opening degree of the electronic expansion valve of the second type of indoor unit to be 50 steps before the second type of indoor unit operates in the heating mode and the preset time length is not reached.
6. The operation control method according to any one of claims 1 to 3,
the preset shutdown opening-closing degree range is 30 steps to 100 steps.
7. An operation control device for a multi-split air conditioner including a plurality of indoor units and an outdoor unit, wherein the indoor unit in an operating state is referred to as a first-type indoor unit, and the indoor unit in a shutdown state is referred to as a second-type indoor unit, the operation control device comprising:
the determining unit is used for determining the temperature difference between the middle temperature and the outlet temperature of the second type of indoor unit after the second type of indoor unit operates in the heating mode and reaches a preset time length, and recording the temperature difference as the supercooling degree temperature difference;
the comparison unit is used for comparing the magnitude relation between the supercooling degree temperature difference and a preset temperature difference value according to a preset period;
the adjusting unit is used for adjusting the opening and closing degree of the electronic expansion valve of the second type indoor unit according to the size relationship;
the determination unit is further configured to: after detecting that the number of the first type of indoor units is 1, determining that the preset temperature difference value is the temperature difference between the middle temperature and the outlet temperature of the first type of indoor units;
the calculating unit is used for calculating the temperature difference between the middle temperature and the outlet temperature of any one first type of indoor unit and recording the temperature difference as a first supercooling degree temperature difference after detecting that the number of the first type of indoor units is more than 1;
the computing unit is further to: calculating the average value of all the first supercooling degree temperature differences, and determining the average value as the preset temperature difference value;
the adjustment unit is further configured to: controlling the opening degree of the electronic expansion valve of the second type indoor unit to belong to a preset shutdown opening degree range in the process of adjusting the opening degree of the electronic expansion valve of the second type indoor unit according to the size relation;
the adjustment unit is further configured to: when the supercooling degree temperature difference of any second type indoor unit is detected to be larger than the preset temperature difference, the opening and closing degree of the electronic expansion valve of the corresponding second type indoor unit is increased step by step according to a first preset adjustment quantity;
the adjustment unit is further configured to: and when the supercooling degree temperature difference of any second type of indoor unit is detected to be less than or equal to the preset temperature difference, the opening degree of the electronic expansion valve of the corresponding second type of indoor unit is reduced step by step according to a second preset adjustment quantity.
8. The operation control device according to claim 7,
the first preset adjustment amount is 5 steps.
9. The operation control device according to claim 7,
the second preset adjustment amount is 5 steps.
10. The operation control device according to any one of claims 7 to 9,
the preset time is greater than or equal to 3 minutes.
11. The operation control device according to any one of claims 7 to 9, characterized by further comprising:
and the presetting unit is used for presetting the opening degree of the electronic expansion valve of the second type indoor unit to be 50 steps before the second type indoor unit operates in the heating mode and the preset time length is not reached.
12. The operation control device according to any one of claims 7 to 9,
the preset shutdown opening-closing degree range is 30 steps to 100 steps.
13. An air conditioner further comprising a memory, a processor, and a computer program stored on the memory and executable on the processor,
the processor, when executing the computer program, implementing the steps defined by the operation control method of any one of claims 1 to 6;
and/or comprising an operation control device according to any one of claims 7 to 12, said operation control device being connected to said electronic expansion valve.
14. 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 6.
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| CN109579213B (en) * | 2018-11-27 | 2021-05-18 | Tcl空调器(中山)有限公司 | Air conditioner temperature control method, storage device and air conditioner |
| CN110553339A (en) * | 2019-09-19 | 2019-12-10 | 宁波奥克斯电气股份有限公司 | Heat accumulation prevention control method and device for multi-split air conditioner and air conditioner |
| CN110567128A (en) * | 2019-09-23 | 2019-12-13 | 宁波奥克斯电气股份有限公司 | multi-split air conditioner and control method thereof |
| CN110567048B (en) * | 2019-09-27 | 2021-06-01 | 海信（山东）空调有限公司 | Control method and device for electronic expansion valve in multi-split air conditioning operation |
| CN111442487B (en) * | 2020-03-19 | 2021-11-23 | 青岛海尔空调器有限总公司 | Air conditioner control method and system |
| CN113294884B (en) * | 2021-06-21 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Heating control method and device and air conditioner |
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| JP2009121701A (en) * | 2007-11-12 | 2009-06-04 | Panasonic Corp | Multi-room air conditioner |
| CN103411291B (en) * | 2013-08-30 | 2016-03-09 | 海信（山东）空调有限公司 | A kind of expansion valve injection control method and system |
| CN105276749B (en) * | 2014-06-24 | 2018-01-30 | 青岛海信日立空调系统有限公司 | A kind of control method and device of multi-online air-conditioning system |
| CN105588261B (en) * | 2015-01-08 | 2018-03-30 | 青岛海信日立空调系统有限公司 | A kind of control method and device of electronic expansion valve of indoor unit |
| CN107144054B (en) * | 2017-04-14 | 2019-04-16 | 珠海格力电器股份有限公司 | The aperture control method and device of electric expansion valve |
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