CN112539521A - Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof - Google Patents
Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof Download PDFInfo
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- CN112539521A CN112539521A CN202011516820.8A CN202011516820A CN112539521A CN 112539521 A CN112539521 A CN 112539521A CN 202011516820 A CN202011516820 A CN 202011516820A CN 112539521 A CN112539521 A CN 112539521A
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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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Abstract
The invention provides an air conditioner multi-split air conditioner and a defrosting control method, device and storage medium thereof, wherein the method comprises the following steps: when the multi-connected air conditioner is in heating operation, judging whether the multi-connected air conditioner meets defrosting conditions or not; and when the defrosting condition is judged to be met, controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature. The scheme provided by the invention can realize better air supply comfort effect by optimizing the condition of entering the multi-online continuous heating defrosting.
Description
Technical Field
The invention relates to the field of control, in particular to an air conditioner multi-split air conditioner, a defrosting control method and device thereof, and a storage medium.
Background
The multi-split air conditioner can operate in a modularized mode, but in terms of defrosting, non-continuous heating defrosting is generally carried out, namely all the outer machine modules are defrosted together. The defrosting mode is simple to control, the defrosting period is short, but the defrosting mode is 'frostless defrosting' in many times. During low load, continuous heating defrosting can be executed, part of the outdoor units continue to keep the heating mode to ensure indoor comfort of the indoor units in the heating startup, part of the outdoor units are turned to the cooling mode to defrost, and defrosting is alternately performed after defrosting is finished. The continuous heating defrosting mode can ensure the indoor comfort of the heating indoor unit when the indoor unit is started, and can also carry out defrosting simultaneously, however, the conditions of the current market products are unreasonable when the continuous heating defrosting mode enters, and continuous heating defrosting is carried out on the premise that the air outlet temperature of the heating indoor unit cannot be ensured at many times, so that the lower air outlet temperature is caused, and strong indoor discomfort is caused.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides an air conditioner multi-connected unit, a defrosting control method and device thereof and a storage medium, so as to solve the problem that the air outlet temperature of an indoor unit of a heating startup cannot be ensured when the multi-connected unit executes continuous heating defrosting in the prior art.
The invention provides a defrosting control method for a multi-split air conditioner, which comprises the following steps: when the multi-connected air conditioner is in heating operation, judging whether the multi-connected air conditioner meets defrosting conditions or not; and when the defrosting condition is judged to be met, controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature.
Optionally, the controlling the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature includes: acquiring the capacity ratio of the rated capacity sum of the indoor units which are heating to the rated capacity sum of all the outdoor units; and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio.
Optionally, controlling the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio includes: determining a corresponding capacity correction coefficient according to a temperature interval of the outdoor environment temperature in a plurality of preset temperature intervals; determining a corresponding defrosting mode judgment coefficient according to the capacity correction coefficient and the rated capacity sum of the front N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the front N-1 outdoor units are sorted from small to large according to the rated capacity; controlling the air conditioner multi-connected unit to enter a continuous heating defrosting mode or a non-continuous heating defrosting mode according to whether the capacity ratio is smaller than the defrosting mode judgment coefficient; if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is larger than or equal to the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a discontinuous heating defrosting mode.
Optionally, the determining whether the air conditioner multi-split air conditioner meets a defrosting condition includes: and when judging that at least one outdoor unit of the air-conditioning multi-split air conditioner meets the defrosting condition, determining that the air-conditioning multi-split air conditioner meets the defrosting condition.
In another aspect, the present invention provides a multi-split defrosting control apparatus for an air conditioner, including: the judging unit is used for judging whether the air conditioner multi-connected unit meets defrosting conditions or not when the air conditioner multi-connected unit is in heating operation; and the control unit is used for controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature when the judgment unit judges that the defrosting condition is met.
Optionally, the determining unit, configured to control the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to an outdoor environment temperature, includes: acquiring the capacity ratio of the rated capacity sum of the indoor units which are heating to the rated capacity sum of all the outdoor units; and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio.
Optionally, the determining unit includes: the first determining subunit is used for determining a corresponding capacity correction coefficient according to a temperature interval in which the outdoor environment temperature is located in a plurality of preset temperature intervals; the second determining subunit is used for determining a corresponding defrosting mode judgment coefficient according to the capacity correction coefficient and the rated capacity sum of the first N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the rated capacities of the first N-1 outdoor units are sorted from small to large; the control subunit controls the air conditioner multi-connected unit to enter a continuous heating defrosting mode or a non-continuous heating defrosting mode according to whether the capacity ratio is smaller than the defrosting mode judgment coefficient; if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is larger than or equal to the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a discontinuous heating defrosting mode.
Optionally, the determining unit determines whether the air conditioner multi-split air conditioner meets a defrosting condition, including: and when judging that at least one outdoor unit of the air-conditioning multi-split air conditioner meets the defrosting condition, determining that the air-conditioning multi-split air conditioner meets the defrosting condition.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
In yet another aspect, the present invention provides an air conditioner multi-split system, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor executes the computer program to implement the steps of any one of the foregoing methods.
The invention further provides an air conditioner multi-split air conditioner which comprises the air conditioner multi-split air conditioner defrosting control device.
According to the technical scheme of the invention, when the air-conditioning multi-connected unit needs defrosting, the air-conditioning multi-connected unit is controlled to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature, the condition for entering the multi-connected unit continuous heating defrosting is optimized, and the air outlet temperature of the indoor unit which is started up meets the comfort requirement. And selecting a corresponding defrosting mode judgment coefficient according to the outdoor environment temperature, and comparing a capacity ratio Qn of the sum of the rated capacities of the indoor units and all the outdoor units with the defrosting mode judgment coefficient according to the heating capacity requirement of more than 0 to judge whether to execute conventional defrosting (non-continuous heating defrosting) or continuous heating defrosting. According to different outdoor environment temperatures, before heating and defrosting, defrosting mode judgment parameters are determined according to different capacity correction values, so that judgment is carried out according to the defrosting mode judgment parameters, the multi-split continuous heating and defrosting entry conditions are optimized, the unit continuously heats within a certain load range, indoor continuous hot air supply is guaranteed, and different judgment methods are executed by the unit at different environment temperatures to ensure that the air outlet temperature of the indoor unit at startup meets the comfort requirement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a method schematic diagram of an embodiment of an air conditioner multi-online defrosting control method provided by the invention;
fig. 2 is a schematic flow chart illustrating an embodiment of a step of controlling the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio;
FIG. 3 is a schematic diagram illustrating a defrosting control method for multiple air conditioning units according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating the structure of an embodiment of the multi-connected air conditioner defrosting control device provided by the present invention;
fig. 5 is a block diagram of a specific implementation of a control unit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a multi-connected defrosting control method for an air conditioner. The method can be used for defrosting control of the modular air conditioner multi-split air conditioner.
Fig. 1 is a method schematic diagram of an embodiment of a multi-connected air conditioner defrosting control method provided by the invention. As shown in fig. 1, according to an embodiment of the present invention, the control method includes at least step S110 and step S120.
And step S110, judging whether the multi-connected air conditioner unit meets defrosting conditions when the multi-connected air conditioner unit is in heating operation.
Specifically, when the temperature of the heat exchanger of the outdoor unit is detected to be lower than a preset temperature value, the defrosting condition is met, and defrosting is started. In one embodiment, when at least one outdoor unit of the air-conditioning multi-split air-conditioner is judged to meet a defrosting condition, the air-conditioning multi-split air-conditioner is determined to meet the defrosting condition.
The detection accuracy of defrosting temperature bulbs arranged in the outdoor unit is influenced, the temperature detected by some outdoor unit defrosting temperature bulbs reaches a defrosting entering condition, and the temperature detected by some outdoor unit defrosting temperature bulbs may not reach the defrosting condition.
And step S120, when the defrosting condition is judged to be met, controlling the multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature.
In one specific embodiment, the capacity ratio of the sum of rated capacities of the indoor units which are heating to the sum of rated capacities of all the outdoor units is obtained; and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio. The indoor unit that is heating, that is, the indoor unit whose heating capacity demand is greater than 0. The capacity ratio Qn between the sum of the rated capacities of the indoor units that are heating and the sum of the rated capacities of all the outdoor units is equal to the sum of the rated capacities of the indoor units/the sum of the rated capacities of all the outdoor units, where the heating capacity requirement is greater than 0.
Fig. 2 is a schematic flow chart of an embodiment of a step of controlling the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio. As shown in fig. 2, step S120 includes step S121, step S122, and step S123.
Step S121, determining a corresponding capacity correction coefficient according to a temperature interval in which the outdoor environment temperature is located in more than two preset temperature intervals.
Specifically, different temperature intervals correspond to different capacity correction factors. That is, the outdoor ring temperature T is determinedOutdoorsAnd determining the corresponding capacity correction coefficient m in the temperature interval of more than two preset temperature intervals, wherein m is less than 1. For example, the outdoor environment temperature is divided into three temperature intervals when T1 < TOutdoorsWhen the corresponding capacity correction coefficient is m1, when T2 < TOutdoorsWhen the value is less than or equal to T1, the corresponding capacity correction coefficient is m2, and when T is less than or equal to T1OutdoorsWhen the value is less than or equal to t2, the corresponding capacity correction coefficient is m3, wherein t1 is more than t 2. The outdoor ambient temperatureThe lower the degree, the smaller the capacity correction coefficient, i.e., m1 > m2 > m 3. Different capacity correction coefficients corresponding to different temperature intervals can be obtained through experiments.
And step S122, determining a corresponding defrosting mode judgment coefficient according to the capacity correction coefficient and the rated capacity sum of the front N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner from small to large according to the rated capacity.
Specifically, N is the total number of outdoor units of the air conditioning multi-split air conditioner. And determining a corresponding defrosting mode judgment coefficient according to the rated capacity sum of the first N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner unit, namely the N-1 outdoor units with the smallest rated capacity in the N outdoor units of the air conditioning multi-split air conditioner unit, which are sorted from small to large according to the rated capacity. And the corresponding defrosting mode judgment coefficient is equal to the product of the capacity correction coefficient and the sum of the rated capacities of the front N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the front N-1 outdoor units are sequenced from small to large according to the rated capacities.
For example, table 1 shows defrosting mode determination coefficients corresponding to outdoor ambient temperatures under different total outdoor unit quantities. K1 is T1 < TOutdoorsA defrosting mode determination coefficient corresponding to time (capacity correction coefficient m is m1), where K2 is T2 < TOutdoorsWhen the capacity correction coefficient m is not more than T1 (m 2), K3 is TOutdoorsAnd (c) a defrosting mode judgment coefficient corresponding to t2 (the capacity correction coefficient m is m 3). In table 1, the total number of modules is the total number of outdoor units of the air conditioning multi-split air conditioner. The defrosting mode decision coefficient is a capacity ratio designed, e.g., 25%, 50%, …
TABLE 1
The calculation principle of the defrosting mode judgment coefficient is based on the principle of ' minimum outdoor unit capacity ', because in the process of alternating defrosting (one outdoor unit is defrosted, and other outdoor units are kept in heating operation), ' the conditions that a large-capacity outdoor unit continues heating and a small-capacity outdoor unit alternately defrosts ' generally have no problem, however, under the conditions that the large-capacity outdoor unit alternately defrosts and the small-capacity outdoor unit heats ' the small-capacity outdoor unit generally cannot guarantee the air outlet temperature of the indoor unit, therefore, the defrosting mode judgment coefficient is adopted to judge whether to execute the continuous defrosting mode, and the continuous heating defrosting is executed under the condition that the air outlet temperature of the indoor unit can be guaranteed. For example, if there are two outdoor units in the system, the judgment value is determined for the one with a smaller capacity (the one with a smaller capacity can provide a smaller amount of heat exchange). Similarly, when 3 external units are arranged in the system, and 1 external unit is defrosted, the other two external units need to ensure heating, so that the defrosting mode judgment coefficient is determined by the two capacities and the minimum capacity of the external unit. Therefore, the mode that different capacity correction values are adopted according to different outdoor environment temperatures and different defrosting mode judgment coefficients are obtained according to the minimum outdoor unit capacity can ensure that the outlet air temperature of the indoor unit meets the comfort requirement.
And S123, controlling the air conditioner multi-connected unit to enter a continuous heating and defrosting mode or a non-continuous heating and defrosting mode according to whether the capacity ratio is smaller than the defrosting mode judgment coefficient.
The discontinuous heating defrosting cream comprises: all outdoor units of the air conditioning multi-split air conditioner are defrosted together, and the continuous heating defrosting comprises: and defrosting is carried out on each outdoor unit of the air conditioning multi-split air conditioner in turn until all the outdoor units are defrosted, namely, one outdoor unit is defrosted, and other outdoor units keep heating operation. For example, the multi-split air conditioner comprises A, B, C three outdoor units, wherein A firstly enters defrosting (in a refrigeration mode), and B and C keep heating operation; after defrosting of A is finished, B enters defrosting, and A and C keep heating operation; and C, after defrosting B is finished, defrosting C, and keeping heating operation of A and B. And C, after defrosting is finished, the unit normally heats and operates.
Specifically, if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is not smaller than the defrosting mode judgment coefficient, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode.
For example, the rating of the indoor unit that is heating is obtainedThe capacity ratio of the sum of the capacities to the sum of the rated capacities of all the outdoor units is Qn, when T1 < TOutdoorsIf the judgment coefficient of the corresponding defrosting mode is K1, if Qn is less than K1, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode to execute continuous heating defrosting, otherwise, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode to execute discontinuous heating defrosting; when T2 < TOutdoorsWhen the temperature is less than or equal to t1, the corresponding defrosting mode judgment coefficient is K2, if Qn is less than K2, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode to execute continuous heating defrosting, otherwise, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode to execute discontinuous heating defrosting; when T isOutdoorsWhen t2 is less than or equal to, the corresponding defrosting mode judgment coefficient is K3, if Qn is less than K3, the air-conditioning multi-split air-conditioning multi.
In order to clearly illustrate the technical solution of the present invention, an execution flow of the air conditioner multi-split air conditioner defrosting control method provided by the present invention is described below with an embodiment.
Fig. 3 is a schematic method diagram of an embodiment of a defrosting control method for multiple air conditioning units according to the present invention. As shown in fig. 3, after the air conditioner multi-split air conditioner is started to operate, whether a defrosting condition is met is determined, when the defrosting condition is determined not to be met, normal operation is continued, and when the defrosting condition is determined to be met, whether continuous heating defrosting or discontinuous heating defrosting is performed is further determined. When the outdoor environment temperature is higher than a t1 temperature value, calculating a K1 value by using m1, judging, when the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is less than a K1 value, continuously heating and ensuring the air outlet temperature of the indoor units, if the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is more than or equal to a K1 value, the air outlet temperature cannot be ensured, the unit does not enter continuous heating defrosting, and the operation is carried out according to common defrosting (discontinuous heating defrosting); when the outdoor environment temperature is between t2 and t1, calculating a K2 value by using m2, judging, when the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is less than the K2 value, entering continuous heating and ensuring the air outlet temperature of the indoor units, if the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is more than or equal to the K2 value, the air outlet temperature cannot be ensured, the unit does not enter continuous heating defrosting, executing the operation according to common defrosting (discontinuous heating defrosting), if the outdoor temperature is less than t2, calculating the K3 value by using m3, judging, when the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is less than the K3 value, entering continuous heating and ensuring the air outlet temperature, if the sum Qn of the total capacity of the indoor units for heating startup and the total capacity of all the outdoor units is more than or equal to the K3 value, the air outlet temperature cannot, the treatment is carried out according to common defrosting (non-continuous heating defrosting).
In the above embodiment, when the outdoor ambient temperature is greater than the temperature value of t1, at this time, the ambient temperature is considered to be relatively high, the higher capacity correction coefficient m1 is used to calculate the defrosting mode judgment coefficient K1, and the judgment is performed, when the sum Qn of the total capacity of the indoor units for starting up by heating and the total capacity of all the outdoor units is less than the value K1, it indicates that the capacities of the indoor units for starting up by heating are not large, continuous heating can be performed and the air-out temperature of the indoor units can be ensured, if the sum Qn of the total capacity of the indoor units for starting up by heating and the total capacity of all the outdoor units is greater than or equal to the value K1, the unit does not perform continuous heating defrosting because the air; when the outdoor environment temperature is between t2 and t1, compared with the above situation, the temperature is reduced, whether continuous heating is performed or not at this time needs to calculate K2 by using m2 with a value smaller than m1, it can also be understood that the lower outdoor environment temperature when the system alternately defrosts ensures that the capacity of the indoor unit reaching the target outlet air temperature is smaller, for example, when the outdoor unit is operated at-5 ℃, the outlet air temperature of 3 indoor units can be ensured to reach above 38 ℃ when the minimum outdoor unit is operated, but when the outdoor temperature is at-20 ℃, the outlet air temperature of only 2 indoor units or even 1 indoor unit can be ensured to reach above 38 ℃. By adopting the judging mode, the continuous heating effect of the unit can be guaranteed. When the outdoor temperature is less than t2, it can be understood that the outdoor ambient temperature is very low, and at this time, the m value needs to be further reduced, and m2 is used for calculating K3.
The invention provides a multi-unit defrosting control device of an air conditioner. The device can be used for defrosting control of the modular air conditioner multi-split air conditioner.
Fig. 4 is a block diagram of an embodiment of the multiple air conditioner defrosting control device provided by the invention. As shown in fig. 4, the defrosting control apparatus 100 includes a judgment unit 110 and a control unit 120.
The determining unit 110 is configured to determine whether the air conditioner multi-connected unit meets a defrosting condition when the air conditioner multi-connected unit is in heating operation.
In one embodiment, the determining unit 110 obtains a capacity ratio of a sum of rated capacities of the indoor units that are heating to a sum of rated capacities of all the outdoor units; and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio. The indoor unit that is heating, that is, the indoor unit whose heating capacity demand is greater than 0. The capacity ratio Qn between the sum of the rated capacities of the indoor units that are heating and the sum of the rated capacities of all the outdoor units is equal to the sum of the rated capacities of the indoor units/the sum of the rated capacities of all the outdoor units, where the heating capacity requirement is greater than 0.
The control unit 120 is configured to control the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature when the determining unit 110 determines that the defrosting condition is met.
Fig. 5 is a block diagram of a specific implementation of a control unit according to an embodiment of the invention. As shown in fig. 5, the control unit 120 includes: a first determining subunit 121, a second determining subunit 122, and a control subunit 123.
The first determining subunit 121 is configured to determine a corresponding capacity correction coefficient according to a temperature interval in which the outdoor environment temperature is located in a preset plurality of temperature intervals.
Specifically, different temperature intervals correspond to different capacity correction factors. That is, the outdoor ring temperature T is determinedOutdoorsAnd determining the corresponding capacity correction coefficient m in the temperature interval of more than two preset temperature intervals, wherein m is less than 1. For example, the outdoor ambient temperature is divided into three temperature intervalst1＜TOutdoorsWhen the corresponding capacity correction coefficient is m1, when T2 < TOutdoorsWhen the value is less than or equal to T1, the corresponding capacity correction coefficient is m2, and when T is less than or equal to T1OutdoorsWhen the value is less than or equal to t2, the corresponding capacity correction coefficient is m3, wherein t1 is more than t 2. The lower the outdoor environment temperature is, the smaller the capacity correction coefficient is, namely, m1 is larger than m2 is larger than m 3. Different capacity correction coefficients corresponding to different temperature intervals can be obtained through experiments.
The second determining subunit 122 is configured to determine a corresponding defrosting mode determining coefficient according to the capacity correction coefficient and a sum of rated capacities of the first N-1 outdoor units, which are sorted according to rated capacities from small to large, of the N outdoor units of the air conditioning multi-split air conditioner.
Specifically, N is the total number of outdoor units of the air conditioning multi-split air conditioner. And determining a corresponding defrosting mode judgment coefficient according to the rated capacity sum of the first N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner unit, namely the N-1 outdoor units with the smallest rated capacity in the N outdoor units of the air conditioning multi-split air conditioner unit, which are sorted from small to large according to the rated capacity. And the corresponding defrosting mode judgment coefficient is equal to the product of the capacity correction coefficient and the sum of the rated capacities of the front N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the front N-1 outdoor units are sequenced from small to large according to the rated capacities.
For example, table 1 shows defrosting mode determination coefficients corresponding to outdoor ambient temperatures under different total outdoor unit quantities. K1 is T1 < TOutdoorsA defrosting mode determination coefficient corresponding to time (capacity correction coefficient m is m1), where K2 is T2 < TOutdoorsWhen the capacity correction coefficient m is not more than T1 (m 2), K3 is TOutdoorsAnd (c) a defrosting mode judgment coefficient corresponding to t2 (the capacity correction coefficient m is m 3). In table 1, the total number of modules is the total number of outdoor units of the air conditioning multi-split air conditioner. The defrosting mode decision coefficient is a capacity ratio designed, e.g., 25%, 50%, …
TABLE 1
The calculation principle of the defrosting mode judgment coefficient is based on the principle of ' minimum outdoor unit capacity ', because in the process of alternating defrosting (one outdoor unit is defrosted, and other outdoor units are kept in heating operation), ' the conditions that a large-capacity outdoor unit continues heating and a small-capacity outdoor unit alternately defrosts ' generally have no problem, however, under the conditions that the large-capacity outdoor unit alternately defrosts and the small-capacity outdoor unit heats ' the small-capacity outdoor unit generally cannot guarantee the air outlet temperature of the indoor unit, therefore, the defrosting mode judgment coefficient is adopted to judge whether to execute the continuous defrosting mode, and the continuous heating defrosting is executed under the condition that the air outlet temperature of the indoor unit can be guaranteed. For example, if there are two outdoor units in the system, the judgment value is determined for the one with a smaller capacity (the one with a smaller capacity can provide a smaller amount of heat exchange). Similarly, when 3 external units are arranged in the system, and 1 external unit is defrosted, the other two external units need to ensure heating, so that the defrosting mode judgment coefficient is determined by the two capacities and the minimum capacity of the external unit. Therefore, the mode that different capacity correction values are adopted according to different outdoor environment temperatures and different defrosting mode judgment coefficients are obtained according to the minimum outdoor unit capacity can ensure that the outlet air temperature of the indoor unit meets the comfort requirement.
The control subunit 123 controls the air conditioner multi-split air conditioner to enter a continuous heating and defrosting mode or a non-continuous heating and defrosting mode according to whether the capacity ratio is smaller than the defrosting mode determination coefficient.
The discontinuous heating defrosting cream comprises: all outdoor units of the air conditioning multi-split air conditioner are defrosted together, and the continuous heating defrosting comprises: and defrosting is carried out on each outdoor unit of the air conditioner multi-split air conditioner in turn until all the outdoor units finish defrosting. For example, the multi-split air conditioner comprises A, B, C three outdoor units, wherein A firstly enters defrosting (in a refrigeration mode), and B and C keep heating operation; after defrosting of A is finished, B enters defrosting, and A and C keep heating operation; and C, after defrosting B is finished, defrosting C, and keeping heating operation of A and B. And C, after defrosting is finished, the unit normally heats and operates.
Specifically, if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is not smaller than the defrosting mode judgment coefficient, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode.
For example, the capacity ratio of the sum of the rated capacities of the indoor units in heating to the sum of the rated capacities of all the outdoor units is Qn, and when T1 < TOutdoorsIf the judgment coefficient of the corresponding defrosting mode is K1, if Qn is less than K1, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode to execute continuous heating defrosting, otherwise, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode to execute discontinuous heating defrosting; when T2 < TOutdoorsWhen the temperature is less than or equal to t1, the corresponding defrosting mode judgment coefficient is K2, if Qn is less than K2, the multi-split air conditioner is controlled to enter a continuous heating defrosting mode to execute continuous heating defrosting, otherwise, the multi-split air conditioner is controlled to enter a discontinuous heating defrosting mode to execute discontinuous heating defrosting; when T isOutdoorsWhen t2 is less than or equal to, the corresponding defrosting mode judgment coefficient is K3, if Qn is less than K3, the air-conditioning multi-split air-conditioning multi.
The invention also provides a storage medium corresponding to the air conditioner multi-connected machine defrosting control method, and a computer program is stored on the storage medium, and when the program is executed by a processor, the steps of any one of the methods are realized.
The invention also provides an air conditioner multi-split air conditioner corresponding to the defrosting control method of the air conditioner multi-split air conditioner, which comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides an air-conditioning multi-split air-conditioning corresponding to the air-conditioning multi-split air-conditioning defrosting control device, which comprises any one of the air-conditioning multi-split air-conditioning defrosting control devices.
According to the scheme provided by the invention, when the air conditioner multi-connected unit needs defrosting, the air conditioner multi-connected unit is controlled to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature, the condition for entering the multi-connected unit continuous heating defrosting is optimized, and the air outlet temperature of the indoor unit at startup meets the comfort requirement. And selecting a corresponding defrosting mode judgment coefficient according to the outdoor environment temperature, and comparing a capacity ratio Qn of the sum of the rated capacities of the indoor units and all the outdoor units with the defrosting mode judgment coefficient according to the heating capacity requirement of more than 0 to judge whether to execute conventional defrosting (non-continuous heating defrosting) or continuous heating defrosting. According to different outdoor environment temperatures, before heating and defrosting, defrosting mode judgment parameters are determined according to different capacity correction values, so that judgment is carried out according to the defrosting mode judgment parameters, the multi-split continuous heating and defrosting entry conditions are optimized, the unit continuously heats within a certain load range, indoor continuous hot air supply is guaranteed, and different judgment methods are executed by the unit at different environment temperatures to ensure that the air outlet temperature of the indoor unit at startup meets the comfort requirement.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A multi-connected air conditioner defrosting control method is characterized by comprising the following steps:
when the multi-connected air conditioner is in heating operation, judging whether the multi-connected air conditioner meets defrosting conditions or not;
and when the defrosting condition is judged to be met, controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature.
2. The method as claimed in claim 1, wherein controlling the air-conditioning multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to an outdoor ambient temperature comprises:
acquiring the capacity ratio of the rated capacity sum of the indoor units which are heating to the rated capacity sum of all the outdoor units;
and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio.
3. The method as claimed in claim 2, wherein controlling the air-conditioning multi-split air-conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor ambient temperature and the capacity ratio comprises:
determining a corresponding capacity correction coefficient according to a temperature interval of the outdoor environment temperature in a plurality of preset temperature intervals;
determining a corresponding defrosting mode judgment coefficient according to the capacity correction coefficient and the rated capacity sum of the front N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the front N-1 outdoor units are sorted from small to large according to the rated capacity;
controlling the air conditioner multi-connected unit to enter a continuous heating defrosting mode or a non-continuous heating defrosting mode according to whether the capacity ratio is smaller than the defrosting mode judgment coefficient;
if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is larger than or equal to the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a discontinuous heating defrosting mode.
4. The method according to any one of claims 1 to 3, wherein the judging whether the air conditioner multi-split air conditioner meets the defrosting condition comprises the following steps:
and when judging that at least one outdoor unit of the air-conditioning multi-split air conditioner meets the defrosting condition, determining that the air-conditioning multi-split air conditioner meets the defrosting condition.
5. An air conditioner multi-split defrosting control device is characterized by comprising:
the judging unit is used for judging whether the air conditioner multi-connected unit meets defrosting conditions or not when the air conditioner multi-connected unit is in heating operation;
and the control unit is used for controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature when the judgment unit judges that the defrosting condition is met.
6. The device of claim 5, wherein the determining unit controls the air conditioner multi-split air conditioner to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature, and comprises:
acquiring the capacity ratio of the rated capacity sum of the indoor units which are heating to the rated capacity sum of all the outdoor units;
and controlling the air conditioner multi-connected unit to enter a discontinuous heating defrosting mode or a continuous heating defrosting mode according to the outdoor environment temperature and the capacity ratio.
7. The apparatus according to claim 6, wherein the determining unit comprises:
the first determining subunit is used for determining a corresponding capacity correction coefficient according to a temperature interval in which the outdoor environment temperature is located in a plurality of preset temperature intervals;
the second determining subunit is used for determining a corresponding defrosting mode judgment coefficient according to the capacity correction coefficient and the rated capacity sum of the first N-1 outdoor units in the N outdoor units of the air conditioning multi-split air conditioner, wherein the rated capacities of the first N-1 outdoor units are sorted from small to large;
the control subunit controls the air conditioner multi-connected unit to enter a continuous heating defrosting mode or a non-continuous heating defrosting mode according to whether the capacity ratio is smaller than the defrosting mode judgment coefficient;
if the capacity ratio is smaller than the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a continuous heating defrosting mode, and if the capacity ratio is larger than or equal to the defrosting mode judgment coefficient, the multi-connected air conditioner is controlled to enter a discontinuous heating defrosting mode.
8. The device according to any one of claims 5 to 7, wherein the determining unit determines whether the air conditioning multi-split air conditioner meets a defrosting condition, and comprises:
and when judging that at least one outdoor unit of the air-conditioning multi-split air conditioner meets the defrosting condition, determining that the air-conditioning multi-split air conditioner meets the defrosting condition.
9. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
10. An air conditioning multi-connected unit, characterized by comprising a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the method as claimed in any one of claims 1 to 4, or comprises the air conditioning multi-connected unit defrosting control device as claimed in any one of claims 5 to 8.
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| CN202011516820.8A CN112539521B (en) | 2020-12-21 | 2020-12-21 | Air conditioner multi-split air conditioner and defrosting control method and device and storage medium thereof |
| PCT/CN2021/129738 WO2022134906A1 (en) | 2020-12-21 | 2021-11-10 | Multi-split air conditioner and defrosting control method and apparatus therefor, and storage medium |
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| CN114963453A (en) * | 2022-05-31 | 2022-08-30 | 宁波奥克斯电气股份有限公司 | Method for determining air conditioner operation mode, multi-split central air conditioner and storage medium |
| CN114963451A (en) * | 2022-05-30 | 2022-08-30 | 宁波奥克斯电气股份有限公司 | Multi-module multi-split air conditioner defrosting control method and device and air conditioner |
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| CN115654660A (en) * | 2022-12-12 | 2023-01-31 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device for multi-split system and multi-split system |
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| CN112539521B (en) | 2022-02-22 |
| WO2022134906A1 (en) | 2022-06-30 |
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