CN112432329A - Control method and device of air conditioning unit and air conditioning system - Google Patents
Control method and device of air conditioning unit and air conditioning system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/60—Energy consumption
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Abstract
The application relates to a control method and device of an air conditioning unit and an air conditioning system. Wherein the method comprises the following steps: monitoring the time that the compressor is continuously operating at the highest frequency; if the time is more than the first preset time, judging whether the compressor is in an overload running state currently; if the judgment result is yes, calculating a corresponding comfortable temperature range based on the current outdoor temperature; and then adjusting the frequency of the compressor based on the current indoor temperature and the comfortable temperature range so as to reduce the energy consumption of the compressor on the premise of ensuring that the adjusted indoor temperature is within the comfortable temperature range. So set up, can not reach the settlement temperature at actual indoor temperature, but when reaching human comfortable temperature range, make indoor temperature be located the comfortable temperature range that the calculation obtained through adjusting compressor frequency to can avoid the compressor to last the extravagant problem of energy that leads to with the maximum frequency operation, also can improve user's travelling comfort when the temperature that the user set for is unreasonable simultaneously.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method and device of an air conditioning unit and an air conditioning system.
Background
Along with the higher requirement of clients on the comfort of the air conditioner, the defect that the host and the tail end of the traditional household water machine cannot be controlled in a linkage mode is more and more obvious. The traditional household water machine main machine cannot automatically adjust the operation strategy according to the indoor load change, and the comfort cannot meet the requirement. But linkage control's many online (fluorine system) has the air-out temperature too high, crosses low and excessive dehumidification's problem, and the travelling comfort promotes the space and is restricted.
In recent years, the concept of water cascade has been more and more emphasized, and the technology has become more and more mature. Patent CN109405162B proposes a water temperature control method based on a water multi-connected air conditioning system, which adjusts the operation strategy of the host in real time according to the load change at the end. Similar linkage control strategies are paid more attention by multi-water research and development personnel, and the linkage control strategies of the host and the tail end are gradually improved.
However, most of these linkage controls perform output adjustment of the main unit based on the end set temperature and the actual indoor temperature. The problem that this produces is that when the ambient temperature is more abominable, and the terminal temperature setting is unreasonable, can lead to the unit overload (overload) to operate, but because the temperature setting is unreasonable, the temperature can not reach the settlement requirement all the time, and the host computer can be operated according to the maximum output for a long time, but actual this moment indoor temperature probably reaches human comfortable condition. The indoor space meets the requirement of comfort, but the host machine still keeps overload operation, which can cause great energy waste.
Disclosure of Invention
The application provides a control method and device of an air conditioning unit and an air conditioning system, and aims to solve the problem that when the environment temperature is severe and the set temperature at the tail end is unreasonable, the comfort requirement is met indoors, but the energy waste caused by overload operation of a host machine is still kept.
The above object of the present application is achieved by the following technical solutions:
in a first aspect, the present application provides a method for controlling an air conditioning unit, including:
monitoring the time that the compressor is continuously operating at the highest frequency;
if the time is longer than the first preset time, judging whether the compressor is in an overload running state currently;
if the compressor is determined to be in the overload running state at present, calculating a corresponding comfortable temperature range based on the current outdoor temperature; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable;
based on the current indoor temperature with comfortable temperature range, adjust the frequency of compressor to guarantee that the indoor temperature after adjusting is located under the prerequisite in comfortable temperature range, reduce the energy consumption of compressor.
Optionally, the determining whether the compressor is currently in the overload operation state includes:
judging whether the absolute value of the difference value between the current indoor temperature and the target temperature set by the user is larger than a preset first correction coefficient or not;
and if the absolute value is larger than the first correction coefficient, determining that the compressor is in an overload running state currently.
Optionally, the calculating the corresponding comfort temperature range based on the current outdoor temperature includes:
calculating the comfort temperature range based on the following formula:
in the formula, TAAnd TBRespectively the upper limit and the lower limit, T, of the comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
Optionally, based on the current indoor temperature with comfortable temperature range, adjust the frequency of compressor to guarantee that the indoor temperature after adjusting is located under the prerequisite in comfortable temperature range, reduce the energy consumption of compressor, include:
correspondingly controlling the compressor to reduce different frequencies based on different size relations between the current indoor temperature and the comfortable temperature range;
continuously adjusting the frequency of the compressor based on the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is within the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
Optionally, correspondingly controlling the compressor to reduce different frequencies based on different magnitude relations between the current indoor temperature and the comfort temperature range includes:
if the current indoor temperature is within the comfortable temperature range, controlling the compressor to reduce a first preset frequency;
if the current indoor temperature exceeds the comfortable temperature range, controlling a compressor to reduce a second preset frequency; wherein the second preset frequency is greater than the first preset frequency.
Optionally, the continuously adjusting the frequency of the compressor based on the adjusted indoor temperature, the comfort temperature range, and the indoor temperature variation value includes:
if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed, controlling the compressor to reduce the second preset frequency again;
if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is changed, controlling the compressor to increase a third preset frequency; wherein the third preset frequency is less than the first preset frequency;
if the adjusted indoor temperature is within the comfortable temperature range, continuously adjusting the frequency of the compressor based on a preset strategy; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
Optionally, the second preset frequency is twice the first preset frequency, and the third preset frequency is half the first preset frequency.
In a second aspect, an embodiment of the present application further provides a control device for an air conditioning unit, including:
a detection module for monitoring the time during which the compressor is continuously operated at the highest frequency;
the judging module is used for judging whether the compressor is in an overload running state currently or not if the time is more than a first preset time;
the calculation module is used for calculating a corresponding comfortable temperature range based on the current outdoor temperature if the compressor is determined to be in the overload running state currently; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable;
and the adjusting module is used for adjusting the frequency of the compressor based on the current indoor temperature and the comfortable temperature range so as to ensure that the adjusted indoor temperature is positioned in the comfortable temperature range and reduce the energy consumption of the compressor.
Optionally, the determining module includes:
the judging unit is used for judging whether the absolute value of the difference value between the current indoor temperature and the target temperature set by the user is larger than a preset first correction coefficient or not;
and the determining unit is used for determining that the compressor is in an overload running state currently if the absolute value is larger than the first correction coefficient.
Optionally, the calculation module includes:
a calculation unit for calculating the comfort temperature range based on the following formula:
in the formula, TAAnd TBRespectively the upper limit and the lower limit, T, of the comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
Optionally, the adjusting module includes:
the first adjusting unit is used for correspondingly controlling the compressor to reduce different frequencies based on different size relations between the current indoor temperature and the comfortable temperature range;
the second adjusting unit is used for continuously adjusting the frequency of the compressor on the basis of the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is in the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
Optionally, the first adjusting unit includes:
the first adjusting subunit is used for controlling the compressor to reduce a first preset frequency if the current indoor temperature is within the comfortable temperature range;
the second adjusting subunit is used for controlling the compressor to reduce a second preset frequency if the current indoor temperature exceeds the comfortable temperature range; wherein the second preset frequency is greater than the first preset frequency.
Optionally, the second adjusting unit includes:
the third adjusting subunit is used for controlling the compressor to reduce the second preset frequency again if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed;
the fourth adjusting subunit is used for controlling the compressor to increase a third preset frequency if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range changes; wherein the third preset frequency is less than the first preset frequency;
the fifth adjusting subunit is used for continuously adjusting the frequency of the compressor based on a preset strategy if the adjusted indoor temperature is within the comfortable temperature range; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
Optionally, the second preset frequency is twice the first preset frequency, and the third preset frequency is half the first preset frequency.
In a third aspect, an embodiment of the present application further provides an air conditioning system, which includes:
the air conditioning unit comprises an air conditioning unit and control equipment of the air conditioning unit connected with the air conditioning unit;
wherein, the controlgear of air conditioning unit includes:
a memory and a processor coupled to the memory;
the memory for storing a program for at least performing the method of any of the first aspects;
the processor is used for calling and executing the program stored in the memory.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the technical scheme that embodiment of this application provided, through the time of monitoring compressor with the maximum frequency continuous operation, thereby when the time is greater than first preset time, judge whether the compressor is currently in the overload running state, if the compressor is currently in the overload running state, then calculate the comfortable temperature range that corresponds based on current outdoor temperature to obtain the frequency of comfortable temperature range regulation compressor based on current indoor temperature and calculation, be located in with guaranteeing that the indoor temperature after adjusting under the prerequisite in the comfortable temperature range, reduce the energy consumption of compressor. So set up, can not reach the settlement temperature at actual indoor temperature, but when reaching human comfortable temperature range, make indoor temperature be located the comfortable temperature range that the calculation obtained through adjusting (reducing) compressor frequency to can avoid the compressor to last the extravagant problem of the energy that leads to with the maximum frequency operation, also can improve user's travelling comfort when the temperature that the user set for is unreasonable simultaneously.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flowchart of a control method for an air conditioning unit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Examples
Referring to fig. 1, fig. 1 is a schematic flowchart of a control method of an air conditioning unit according to an embodiment of the present application. As shown in fig. 1, the method comprises at least the following steps:
s101: monitoring the time that the compressor is continuously operating at the highest frequency;
specifically, in the operation process of the air conditioning unit, the frequency of the compressor can be detected in real time, and when the frequency of the compressor is increased to the highest frequency, timing is triggered, namely, the timing is used for recording the time of the compressor continuously operating at the highest frequency, namely, the timing is cleared as long as the compressor is changed from the operation at the highest frequency to the operation not at the highest frequency.
S102: if the time is longer than the first preset time, judging whether the compressor is in an overload running state currently;
specifically, when the time that the compressor continuously operates at the highest frequency is longer than a first preset time, it indicates that the compressor operates at the highest frequency for a long time, and at this time, the compressor may be in an overload operation state, and the overload operation state may also be referred to as an overload operation state, where this embodiment refers to that the compressor operates at the highest frequency for a long time, but the indoor temperature cannot reach the set target temperature all the time, and therefore, in some embodiments, the specific step of determining whether the compressor is currently in the overload operation state may include:
judging the current indoor temperature TIndoor useAnd a target temperature T set by a userTargetAbsolute value of the difference of (1) | TIndoor use-TTargetWhether | is larger than a preset first correction coefficient a or not; if the absolute value | TIndoor use-TTargetIf the l is larger than the first correction coefficient a, determining that the compressor is in an overload running state currently.
The current indoor temperature can be acquired by a temperature sensor (for example, a temperature sensor arranged in an electric control box of the air conditioning unit), and the target temperature set by a user can be directly read from a corresponding storage module of the air conditioning unit. The absolute value of the difference between the current indoor temperature and the target temperature set by the user is equal to the difference between the current indoor temperature and the target temperature, and when the absolute value is greater than a preset first correction coefficient, the compressor overload operation state can be considered. The first correction coefficient may be set according to actual conditions.
In addition, the above-mentioned "absolute value | T" isIndoor use-TTargetI is greater than the first correction coefficient a' and corresponds to T during coolingIndoor use-TTarget>a, and corresponds to T in heatingTarget-TIndoor use>a。
S103: if the compressor is determined to be in the overload running state at present, calculating a corresponding comfortable temperature range based on the current outdoor temperature; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable; the outdoor temperature can be acquired by a temperature sensor arranged outdoors;
specifically, the compressor is in an overload operation state may be caused by an unreasonable target temperature set by a user, for example, when the outdoor temperature reaches 38 ℃ and the target temperature of the air conditioner is set to 22 ℃ by the user during cooling in summer, the heat exchange efficiency between the outdoor heat exchanger of the refrigerant circulation system and the outdoor air is greatly reduced due to an excessively high outdoor temperature, so that the indoor temperature cannot be reduced to the target temperature of 22 ℃ even if the compressor operates at the highest frequency, but the compressor still operates at the highest frequency because the conventional air conditioner does not have the capability of intelligent frequency modulation for such a scenario. However, for the indoor user, the actual comfortable temperature range does not depend on the set target temperature, but is related to the outdoor environment temperature, for example, if the outdoor temperature is 38 ℃, when the indoor temperature is reduced to about 28 ℃, the user generally feels comfortable because the temperature is reduced remarkably (about 10 ℃), which means that it is not necessary for the user to set the target temperature to 22 ℃. Also, when the target temperature is modified to about 28 ℃ which is comfortable for the user, the compressor is likely to be satisfied without operating at the highest frequency. Based on the principle, when the compressor runs in an overload mode due to unreasonable target temperature set by a user, if the corresponding comfortable temperature range can be calculated based on the current outdoor environment temperature and the frequency of the compressor is correspondingly reduced, a good energy-saving effect can be achieved on the premise that the comfortable requirement of the user is met.
Further, the present embodiment provides a method for calculating a corresponding comfortable temperature range based on the current outdoor temperature, in which the comfortable temperature range is calculated based on the following formula:
in the formula, TAAnd TBRespectively the upper limit and the lower limit, T, of the comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
That is, the present embodiment is to preset a reference temperature TRated valueAnd obtaining the reference temperature T by means of experiments and the likeRated valueUpper limit T of corresponding comfortable temperature rangeaAnd a lower limit TbThen introduces a comfortable temperature correction coefficient alpha, thereby calculating different outdoor temperatures TOutdoorsUpper limit T of corresponding comfortable temperature rangeAAnd a lower limit TB。
Of course, it should be understood that the above method and formula for calculating the comfort temperature range are only exemplary, and in practical applications, other methods and formulas may be used to calculate the comfort temperature range, which is not limited.
S104: based on the current indoor temperature with comfortable temperature range, adjust the frequency of compressor to guarantee that the indoor temperature after adjusting is located under the prerequisite in comfortable temperature range, reduce the energy consumption of compressor.
Specifically, when the frequency of the compressor is adjusted, since the compressor is currently in an overload operation state, the compressor is preferentially controlled to perform at least one down-conversion so as to enable the compressor to be out of the overload operation state, and then the down-conversion or the up-conversion is further determined to be continued or the frequency is maintained to be unchanged according to the indoor temperature change condition after the down-conversion of the compressor and whether the indoor temperature is within a comfortable temperature range.
In some embodiments, when the compressor is controlled to perform frequency reduction at least once under the condition that the compressor operates at the highest frequency, the compressor may be correspondingly controlled to reduce different frequencies based on different magnitude relations between the current indoor temperature and the comfortable temperature range, for example, if the current indoor temperature is within the comfortable temperature range, the compressor is controlled to reduce a first preset frequency; if the current indoor temperature exceeds the comfortable temperature range, controlling the compressor to reduce a second preset frequency; the second preset frequency is greater than the first preset frequency. Then, based on the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value, continuously adjusting the frequency of the compressor so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is within the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
That is, before the compressor reduces the frequency, when the current indoor temperature is within the comfortable temperature range, the compressor can be controlled to reduce the frequency by a small amount (the first preset frequency), and the situation that the current indoor temperature exceeds the comfortable temperature range after the frequency reduction is avoided as much as possible (because in this situation, the frequency reduction is too much, and the frequency increase of the compressor needs to be controlled); before the compressor reduces the frequency, when the current indoor temperature exceeds the comfortable temperature range, the compressor can be controlled to reduce the frequency in a large amount (second preset frequency), so that the indoor temperature is rapidly changed to be within the comfortable temperature range.
It should be noted that, in the above-mentioned "before the compressor down-converts, the current indoor temperature is already beyond the comfortable temperature range", only two possibilities are theoretically included, that is, firstly, the current indoor temperature is greater than the upper limit of the comfortable temperature range, and secondly, the current indoor temperature is less than the lower limit of the comfortable temperature range, but actually, the present embodiment also needs to consider the condition that the compressor is operated at the highest frequency before the compressor down-converts, and at this time, only one possibility is included, for example, when the compressor is currently operated at the highest frequency during the cooling, then the case that the current indoor temperature is beyond the comfortable temperature range may only be "the current indoor temperature is less than the lower limit of the comfortable temperature range", that is, the cooling is excessive.
In other embodiments, when the compressor is controlled to perform frequency reduction at least once under the condition that the compressor operates at the highest frequency, a second correction coefficient may be introduced to further divide the comfort temperature interval on the basis of the scheme that "the compressor is correspondingly controlled to reduce different frequencies based on different size relationships between the current indoor temperature and the comfort temperature range".
For example, during cooling, if the current indoor temperature T isIndoor useSatisfy TB＜TIndoor use＜TA-b, controlling the compressor to reduce the first preset frequency if said current indoorTemperature TIndoor useSatisfy TIndoor use＜TBControlling the compressor to reduce the second preset frequency; wherein b is a second correction coefficient.
For this, when TB＜TIndoor use＜TAB time, indicates the current indoor temperature TIndoor useAnd the compressor is controlled to reduce the first preset frequency at the moment, so that the indoor temperature after frequency reduction can be ensured not to exceed the comfortable temperature range (the indoor temperature is too high).
For example, in heating, if the current indoor temperature T isIndoor useSatisfy TB+b＜TIndoor use＜TAControlling the compressor to reduce the first preset frequency, and if the current indoor temperature T is lower than the first preset frequencyIndoor useSatisfy TIndoor use>TAControlling the compressor to reduce the second preset frequency; wherein b is a second correction coefficient.
For this, when TB+b＜TIndoor use＜TATime, indicates the current indoor temperature TIndoor useAnd the compressor is controlled to reduce the first preset frequency at the moment, so that the indoor temperature after frequency reduction can be ensured not to exceed the comfortable temperature range (the indoor temperature is too low).
In addition, after controlling the compressor to perform frequency reduction at least once, when continuously adjusting the frequency of the compressor based on the adjusted indoor temperature, the comfort temperature range and the indoor temperature variation value, the following method may be adopted:
if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed, controlling the compressor to reduce the second preset frequency again;
that is, before the compressor is down-converted, the indoor temperature is outside the comfortable temperature range due to "excessive" cooling or heating, and after the compressor is down-converted, the magnitude relationship of the indoor temperature after the change with respect to the comfortable temperature range is the same as before (or the temperature range formed by the two indoor temperatures before and after the change is outside the comfortable temperature range). This situation indicates that the temperature change is not significant after the frequency down-conversion, and therefore, the compressor is controlled to decrease the second preset frequency again.
For example, if the air conditioner is operated in a cooling mode, the down-converted front indoor temperature is lower than the lower limit of the comfortable temperature range, and the down-converted indoor temperature is still lower than the lower limit of the comfortable temperature range, the down-conversion can be performed again according to the frequency value of the previous down-conversion.
If the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is changed, controlling the compressor to increase a third preset frequency; wherein the third preset frequency is less than the first preset frequency;
that is, before the compressor is down-converted, the indoor temperature is outside the comfortable temperature range due to "excessive" cooling or heating, and after the compressor is down-converted, the magnitude relationship of the indoor temperature after the change with respect to the comfortable temperature range is opposite to that before (or, the temperature range formed by the two indoor temperatures before and after the change completely includes the comfortable temperature range). This indicates that the temperature after down-conversion is too large (from greater than the upper limit of the comfort temperature range to less than the lower limit of the comfort temperature range, or vice versa), and therefore, the compressor is controlled to increase the third preset frequency so that the room temperature after up-conversion is within the comfort temperature range. The third preset frequency is set to be less than the first preset frequency so as to avoid over-frequency increase. In some embodiments, the magnitude relationship between the first preset frequency, the second preset frequency, and the third preset frequency may be: the second predetermined frequency is twice the first predetermined frequency, and the third predetermined frequency is half the first predetermined frequency.
For example, if the air conditioner is operated in a cooling mode, the temperature in the room before the frequency reduction is lower than the lower limit of the comfortable temperature range, and the temperature in the room after the frequency reduction is changed to be higher than the upper limit of the comfortable temperature range, it is indicated that the temperature in the room is increased too much, and the compressor needs to be controlled to increase the frequency to reduce the temperature in the room.
If the adjusted indoor temperature is within the comfortable temperature range, continuously adjusting the frequency of the compressor based on a preset strategy; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
Specifically, the adjusted indoor temperature is within the comfortable temperature range, which indicates that the final result of the adjustment is close to, and the fine adjustment is continued only by taking the reduction of the energy consumption of the compressor as much as possible as a target and based on a preset strategy.
The preset strategy at least comprises two reference factors, wherein the adjusted indoor temperature is relatively closer to the upper limit or the lower limit of the comfortable temperature range, and the indoor temperature change value is large or small.
For example, in the present embodiment, taking the cooling mode as an example, the fine adjustment may be performed in the following manner:
if the adjusted indoor temperature T'Indoor useAnd indoor temperature variation value DeltaTIndoor useSatisfy TB＜T′Indoor use＜TAB and is
The indoor temperature after the previous frequency reduction is within the comfortable temperature range and is closer to the lower limit of the comfortable temperature range, and the indoor temperature is slightly increased due to the previous frequency reduction, in this case, the indoor temperature cannot exceed the comfortable temperature range even if the same frequency reduction is performed again, so the compressor is controlled to reduce the first preset frequency again to reduce the energy consumption of the compressor;
if the adjusted indoor temperature T'Indoor useAnd indoor temperature variation value DeltaTIndoor useSatisfy TA-b＜T′Indoor use＜TAAnd is
It indicates that the indoor temperature after the previous down-conversion is within the comfort temperature range and closer to the lower limit of the comfort temperature range, in which case if the compressor is down-converted again, the indoor temperature may be caused to be lowerThe comfort temperature range is exceeded, and thus the compressor is controlled to maintain the current frequency operation.
By the method, the frequency of the compressor is continuously finely adjusted until the indoor temperature is within the comfortable temperature range and the frequency of the compressor is as low as possible.
In the above-mentioned scheme of this application, through the time of monitoring compressor with the maximum frequency continuous operation, thereby when the time is greater than first preset time, judge whether the compressor is currently in the overload running state, if the compressor is currently in the overload running state, then calculate the comfortable temperature scope that corresponds based on current outdoor temperature to obtain the frequency that the compressor was adjusted to comfortable temperature scope based on current indoor temperature and calculation, be located in guaranteeing that the indoor temperature after adjusting under the prerequisite in comfortable temperature scope, reduce the energy consumption of compressor. So set up, can not reach the settlement temperature at actual indoor temperature, but when reaching human comfortable temperature range, make indoor temperature be located the comfortable temperature range that the calculation obtained through adjusting (reducing) compressor frequency to can avoid the compressor to last the extravagant problem of the energy that leads to with the maximum frequency operation, also can improve user's travelling comfort when the temperature that the user set for is unreasonable simultaneously.
It should be noted that, the above embodiments of the present application mainly use air-conditioning cooling as an example for description, but when air-conditioning heating is adjusted, the adjustment principle is the same as that of cooling, and only the corresponding adjustment parameters need to be adaptively adjusted, which is not fully illustrated in the present application.
In order to make the technical solution of the present application easier to understand, the overall flow of the above method is described below by a specific example.
The specific example takes air-conditioning refrigeration as an example, and the corresponding control flow at least comprises the following steps:
reading the operating frequency P of the compressor if
Entering an overload state judgment stage; wherein,
for the time of continuous operation of the compressor at the maximum frequency, t1Is a first preset time;
reading target temperature T set by userTargetAnd the current indoor temperature TIndoor useIf T isIndoor use>TTarget+ a, determining that the unit (compressor) is in an overload running state, and needing to enter overload energy-saving regulation control; wherein a is a first correction coefficient;
obtaining a current outdoor temperature TOutdoorsAnd calculating a corresponding comfort temperature range [ T ] based on the following formulaB，TA]：
In the formula, TAAnd TBRespectively, the upper limit and the lower limit, T, of the calculated comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range;
then, based on the current indoor temperature TIndoor useThe compressor is controlled to reduce frequency correspondingly to different relations with comfortable temperature ranges, and the method is divided into two conditions:
if the current indoor temperature TIndoor useSatisfy TB＜TIndoor use＜TA-b, the compressor operating frequency is reduced by a first preset frequency Δ P; wherein b is a second correction coefficient;
after down-conversion by Δ P, further adjustment is performed based on actual conditions:
1) if TB＜T′Indoor use＜TAB and is
The compressor operating frequency is again decreased by the firstPresetting a frequency delta P; wherein, T'Indoor useTo the conditioned (down-converted) indoor temperature;
2) if TA-b＜T′Indoor use＜TAAnd is
The compressor maintains the current frequency operation;
3) if T'Indoor use>TAThen the compressor frequency is increased by a third predetermined frequency
Wherein the frequency is raised to the highest frequency P of the compressormax；
If current indoor temperature TIndoor useSatisfy TIndoor use＜TBIf so, reducing the running frequency of the compressor by a second preset frequency 2 delta P;
after down-conversion by 2 Δ P, further adjustment is performed based on actual conditions:
1) if T'Indoor use＜TBIf so, reducing the running frequency of the compressor by the second preset frequency 2 delta P again;
2) if TB＜T′Indoor use＜TAB and is
The compressor operating frequency is decreased by a first preset frequency Δ P;
3) if TA-b＜T′Indoor use＜TAAnd is
The compressor maintains the current frequency operation;
4) if T'Indoor use>TAThen the compressor frequency is increased by a third predetermined frequency
Wherein the frequency is raised to the highest frequency P of the compressormax。
In addition, corresponding to the control method of the air conditioning unit provided by the above embodiment, the application also provides a control device of the air conditioning unit.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a control device of an air conditioning unit according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:
a detection module 21 for monitoring the time during which the compressor is continuously operated at the highest frequency;
the judging module 22 is configured to judge whether the compressor is currently in an overload operation state if the time is greater than a first preset time;
the calculating module 23 is configured to calculate a corresponding comfortable temperature range based on the current outdoor temperature if it is determined that the compressor is currently in the overload operation state; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable;
and the adjusting module 24 is used for adjusting the frequency of the compressor based on the current indoor temperature and the comfortable temperature range so as to reduce the energy consumption of the compressor on the premise of ensuring that the adjusted indoor temperature is within the comfortable temperature range.
Optionally, the determining module 22 includes:
the judging unit is used for judging whether the absolute value of the difference value between the current indoor temperature and the target temperature set by the user is larger than a preset first correction coefficient or not;
and the determining unit is used for determining that the compressor is in an overload running state currently if the absolute value is larger than the first correction coefficient.
Optionally, the calculating module 23 includes:
a calculation unit for calculating the comfort temperature range based on the following formula:
in the formula，TAAnd TBRespectively the upper limit and the lower limit, T, of the comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
Optionally, the adjusting module 24 includes:
the first adjusting unit is used for correspondingly controlling the compressor to reduce different frequencies based on different size relations between the current indoor temperature and the comfortable temperature range;
the second adjusting unit is used for continuously adjusting the frequency of the compressor on the basis of the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is in the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
Optionally, the first adjusting unit includes:
the first adjusting subunit is used for controlling the compressor to reduce a first preset frequency if the current indoor temperature is within the comfortable temperature range;
the second adjusting subunit is used for controlling the compressor to reduce a second preset frequency if the current indoor temperature exceeds the comfortable temperature range; wherein the second preset frequency is greater than the first preset frequency.
Optionally, the second adjusting unit includes:
the third adjusting subunit is used for controlling the compressor to reduce the second preset frequency again if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed;
the fourth adjusting subunit is used for controlling the compressor to increase a third preset frequency if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range changes; wherein the third preset frequency is less than the first preset frequency;
the fifth adjusting subunit is used for continuously adjusting the frequency of the compressor based on a preset strategy if the adjusted indoor temperature is within the comfortable temperature range; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
Optionally, the second preset frequency is twice the first preset frequency, and the third preset frequency is half the first preset frequency.
The specific implementation manner of the functions implemented by the functional modules may be implemented by referring to the corresponding content in the above method embodiments, and is not described in detail here.
In addition, corresponding to the control method of the air conditioning unit, the embodiment of the application further provides an air conditioning system.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application. As shown in fig. 3, the air conditioning system includes:
an air conditioning unit 31 and an air conditioning unit control device 32 connected to the air conditioning unit 31;
the control device 32 of the air conditioning unit comprises:
a memory 321 and a processor 322 connected to the memory 321;
the memory 321 is used for storing a program for executing at least the control method of the air conditioning unit described in the foregoing embodiment;
the processor 322 is used for calling and executing the program stored in the memory 321.
The specific implementation manner of the functions implemented by the program may be implemented by referring to the corresponding content in the above method embodiments, and is not described in detail here.
In the above scheme, the time of the compressor continuously operating at the highest frequency is monitored, so that when the time is longer than a first preset time, whether the compressor is in an overload operation state at present is judged, if the compressor is in the overload operation state at present, a corresponding comfortable temperature range is calculated based on the current outdoor temperature, the frequency of the compressor is adjusted based on the current indoor temperature and the comfortable temperature range obtained through calculation, and the energy consumption of the compressor is reduced on the premise that the adjusted indoor temperature is within the comfortable temperature range. So set up, can not reach the settlement temperature at actual indoor temperature, but when reaching human comfortable temperature range, make indoor temperature be located the comfortable temperature range that the calculation obtained through adjusting (reducing) compressor frequency to can avoid the compressor to last the extravagant problem of the energy that leads to with the maximum frequency operation, also can improve user's travelling comfort when the temperature that the user set for is unreasonable simultaneously.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (15)
1. A control method of an air conditioning unit is characterized by comprising the following steps:
monitoring the time that the compressor is continuously operating at the highest frequency;
if the time is longer than the first preset time, judging whether the compressor is in an overload running state currently;
if the compressor is determined to be in the overload running state at present, calculating a corresponding comfortable temperature range based on the current outdoor temperature; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable;
based on the current indoor temperature with comfortable temperature range, adjust the frequency of compressor to guarantee that the indoor temperature after adjusting is located under the prerequisite in comfortable temperature range, reduce the energy consumption of compressor.
2. The method of claim 1, wherein said determining whether the compressor is currently in an overload operating state comprises:
judging whether the absolute value of the difference value between the current indoor temperature and the target temperature set by the user is larger than a preset first correction coefficient or not;
and if the absolute value is larger than the first correction coefficient, determining that the compressor is in an overload running state currently.
3. The method of claim 1, wherein said calculating a corresponding comfort temperature range based on a current outdoor temperature comprises:
calculating the comfort temperature range based on the following formula:
in the formula, TAAnd TBRespectively the upper limit and the lower limit, T, of the comfort temperature rangeOutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
4. The method of claim 1, wherein adjusting the frequency of the compressor based on the current indoor temperature and the comfort temperature range to reduce the power consumption of the compressor while ensuring that the adjusted indoor temperature is within the comfort temperature range comprises:
correspondingly controlling the compressor to reduce different frequencies based on different size relations between the current indoor temperature and the comfortable temperature range;
continuously adjusting the frequency of the compressor based on the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is within the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
5. The method of claim 4, wherein correspondingly controlling the compressor to reduce different frequencies based on different magnitude relationships of the current indoor temperature and the comfort temperature range comprises:
if the current indoor temperature is within the comfortable temperature range, controlling the compressor to reduce a first preset frequency;
if the current indoor temperature exceeds the comfortable temperature range, controlling a compressor to reduce a second preset frequency; wherein the second preset frequency is greater than the first preset frequency.
6. The method of claim 5, wherein continuing to adjust the frequency of the compressor based on the adjusted indoor temperature, the comfort temperature range, and the indoor temperature variation value comprises:
if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed, controlling the compressor to reduce the second preset frequency again;
if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is changed, controlling the compressor to increase a third preset frequency; wherein the third preset frequency is less than the first preset frequency;
if the adjusted indoor temperature is within the comfortable temperature range, continuously adjusting the frequency of the compressor based on a preset strategy; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
7. The method of claim 6, wherein the second predetermined frequency is twice the first predetermined frequency and the third predetermined frequency is half the first predetermined frequency.
8. A control device for an air conditioning unit, comprising:
a detection module for monitoring the time during which the compressor is continuously operated at the highest frequency;
the judging module is used for judging whether the compressor is in an overload running state currently or not if the time is more than a first preset time;
the calculation module is used for calculating a corresponding comfortable temperature range based on the current outdoor temperature if the compressor is determined to be in the overload running state currently; the comfortable temperature range is a range of indoor temperature for making a user feel comfortable;
and the adjusting module is used for adjusting the frequency of the compressor based on the current indoor temperature and the comfortable temperature range so as to ensure that the adjusted indoor temperature is positioned in the comfortable temperature range and reduce the energy consumption of the compressor.
9. The apparatus of claim 8, wherein the determining module comprises:
the judging unit is used for judging whether the absolute value of the difference value between the current indoor temperature and the target temperature set by the user is larger than a preset first correction coefficient or not;
and the determining unit is used for determining that the compressor is in an overload running state currently if the absolute value is larger than the first correction coefficient.
10. The apparatus of claim 8, wherein the computing module comprises:
a calculation unit for calculating the comfort temperature range based on the following formula:
in the formula, TAAnd TBRespectively the calculated upper and lower limit of the comfort temperature range,ToutdoorsIs the current outdoor temperature, TRated valueIs a preset rated outdoor temperature serving as a calculation reference, alpha is a comfort temperature correction coefficient,
Taand TbRespectively rated outdoor temperature TRated valueUpper and lower limits of the corresponding comfort temperature range.
11. The apparatus of claim 10, wherein the adjustment module comprises:
the first adjusting unit is used for correspondingly controlling the compressor to reduce different frequencies based on different size relations between the current indoor temperature and the comfortable temperature range;
the second adjusting unit is used for continuously adjusting the frequency of the compressor on the basis of the adjusted indoor temperature, the comfortable temperature range and the indoor temperature change value so as to reduce the energy consumption of the compressor on the premise that the adjusted indoor temperature is in the comfortable temperature range; and the indoor temperature change value is the change value of the indoor temperature before and after the compressor reduces the frequency.
12. The apparatus of claim 11, wherein the first adjusting unit comprises:
the first adjusting subunit is used for controlling the compressor to reduce a first preset frequency if the current indoor temperature is within the comfortable temperature range;
the second adjusting subunit is used for controlling the compressor to reduce a second preset frequency if the current indoor temperature exceeds the comfortable temperature range; wherein the second preset frequency is greater than the first preset frequency.
13. The apparatus of claim 12, wherein the second adjusting unit comprises:
the third adjusting subunit is used for controlling the compressor to reduce the second preset frequency again if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range is not changed;
the fourth adjusting subunit is used for controlling the compressor to increase a third preset frequency if the adjusted indoor temperature exceeds the comfortable temperature range and the relative magnitude relation between the indoor temperature before and after adjustment and the upper limit and the lower limit of the comfortable temperature range changes; wherein the third preset frequency is less than the first preset frequency;
the fifth adjusting subunit is used for continuously adjusting the frequency of the compressor based on a preset strategy if the adjusted indoor temperature is within the comfortable temperature range; and when the frequency of the compressor is adjusted based on the preset strategy, taking the adjusted indoor temperature relatively closer to the upper limit or the lower limit of the comfortable temperature range and the magnitude of the indoor temperature change value as reference factors.
14. The apparatus of claim 13, wherein the second predetermined frequency is twice the first predetermined frequency, and the third predetermined frequency is half the first predetermined frequency.
15. An air conditioning system, comprising:
the air conditioning unit comprises an air conditioning unit and control equipment of the air conditioning unit connected with the air conditioning unit;
wherein, the controlgear of air conditioning unit includes:
a memory and a processor coupled to the memory;
the memory for storing a program for at least performing the method of any one of claims 1-7;
the processor is used for calling and executing the program stored in the memory.
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