CN106196449B - A kind of air-conditioning defrost enters control method for frequency, system and the air-conditioning of process - Google Patents
A kind of air-conditioning defrost enters control method for frequency, system and the air-conditioning of process Download PDFInfo
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- CN106196449B CN106196449B CN201610560587.0A CN201610560587A CN106196449B CN 106196449 B CN106196449 B CN 106196449B CN 201610560587 A CN201610560587 A CN 201610560587A CN 106196449 B CN106196449 B CN 106196449B
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to airconditioning control field, in particular to a kind of air-conditioning defrost enters control method for frequency, system and the air-conditioning of process.Method is the following steps are included: acquire current compressor running frequency when meeting air-conditioning defrost condition；Compare current compressor running frequency and preset shutdown frequency, frequency reducing rate is obtained according to comparison result and stablizes the time；Control compressor according to the frequency reducing rate from current compressor running frequency be down to shut down frequency and with shut down described in frequency continuous service stablize the time after, it is out of service；After time out of service reaches preset dwell time, control compressor is run according to preset defrost frequency.The present invention is when determining to need to enter defrost process, suitable control method for frequency is selected according to current compressor running frequency, discharge the refrigerant pressure of system sufficiently, match tube vibration to reduce, avoid the danger for being piped disconnected pipe, reduce noise simultaneously, improve the air-conditioning experience sense of user by.
Description
Technical field
The present invention relates to convertible frequency air-conditioner control field, in particular to a kind of air-conditioning defrost enters the frequency controlling party of process
Method, system and air-conditioning.
Background technique
In frequency-conversion air-conditioning system, when air conditioner heat-production is run, if frosting on outdoor condenser, it is easy to influence air-conditioning
The heat transfer effect of device, air conditioner, which needs to be implemented defrost process, just can guarantee heating effect.In the prior art, air conditioner commonization
Frost movement are as follows: first close compressor, four-way valve, outer blower delay a period of time close, then a period of time compressor that is delayed is by
The defrost frequency of setting is run, and when defrost has been completed in judgement, compressor is closed, and outer blower is opened, and be delayed a period of time four-way
Valve is opened, then is delayed a period of time, and compressor is opened, and restores normal heat-production functions.When entering the defrost moment, compressor is logical
It is often to be run with upper frequency, direct close compressor, refrigerant pressure abrupt release come out at this time, and cause piping vibration excessive,
Even there is the danger for being piped disconnected pipe, while can also generate very big noise.
Summary of the invention
The present invention provides control method for frequency, system and air-conditionings that a kind of air-conditioning defrost enters process, solve above
The technical problem.
The technical scheme to solve the above technical problems is that a kind of air-conditioning defrost enters the frequency controlling party of process
Method, comprising the following steps:
Step 1, current compressor running frequency when meeting air-conditioning defrost condition is acquired；
Step 2, compare current compressor running frequency and preset shutdown frequency, frequency reducing rate is obtained according to comparison result
With stablize the time；
Step 3, control compressor according to the frequency reducing rate from current compressor running frequency be down to shut down frequency and with
It shuts down after stablizing the time described in frequency continuous service, it is out of service；
Step 4, after the time out of service reaches preset dwell time, control compressor is transported according to preset defrost frequency
Row.
The beneficial effects of the present invention are: method of the invention determine need enter defrost process when, according to current compression
The height of machine running frequency selects suitable frequency reducing rate and stablizes the time, releases that the refrigerant pressure of frequency-conversion air-conditioning system sufficiently
It puts, matches tube vibration to reduce, avoid the danger for being piped disconnected pipe, while reducing noise, improve the air-conditioning experience sense of user
By.
Based on the above technical solution, the present invention can also be improved as follows.
Further, the step 2 specifically:
S201 determines current compressor running frequency and shuts down the difference of frequency；
S202, according to determining difference selection frequency reducing rate and the frequency reducing rate corresponding stable time.
Further, the S202 specifically: pre-establish current compressor running frequency and shut down the difference and drop of frequency
Frequency rate, the related information table for stablizing the time obtain the difference calculated result in difference by inquiring the related information table
The stabilization time under frequency reducing rate.
Beneficial effect using above-mentioned further scheme is: the further technical solution of the present invention is by presetting related information
Table can quickly find stabilization time of the difference under different frequency reducing rates, to accurately control according to the actual situation
Compressor enters the process before defrost, discharges refrigerant pressure to the greatest extent, shortens the time before entering defrost.
Further, in the related information table, when current compressor running frequency is identical as the difference of frequency is shut down, frequency reducing
Rate is bigger, and the stable time is longer；When frequency reducing rate is identical, current compressor running frequency and the difference for shutting down frequency
Bigger, the stable time is longer.
Further, in the related information table, current compressor running frequency and the difference for shutting down frequency are smaller, and frequency reducing
Rate is smaller, stablizes the time and more levels off to 0.
Further, the value range of the frequency reducing rate is 1~5Hz/s.
Further, it is downconverted to from compressor starts and the total time that the stable time terminates is less than 45s.
Further, it is downconverted to from compressor starts and the total time that the stable time terminates is less than 35s.
Beneficial effect using above-mentioned further scheme is: in this further scheme, when by frequency reducing rate with stablizing
Between controlled, so that controlling compressor starts is downconverted to the time that compressor is run according to defrost frequency, change air-conditioning as early as possible
Frost avoids the time for increasing entire defrost process, influences heating effect.
Further, when current compressor running frequency and shut down frequency difference be 50~60Hz, and frequency reducing rate be 1~
When 2Hz/s, stablizing the time is 1~2s；When current compressor running frequency and the difference of frequency is shut down as 50~60Hz, and frequency reducing
When rate is 3~5Hz/s, stablizing the time is 4~10s.
Further, when current compressor running frequency and shut down frequency difference be 60~70Hz, and frequency reducing rate be 3~
When 5Hz/s, stablizing the time is 10~15s；When current compressor running frequency and the difference of frequency is shut down as 10~20Hz, and is dropped
When frequency rate is 1~2Hz/s, stablizing the time is 0s.
In order to solve the technical problem, the present invention also provides the frequency control systems that a kind of air-conditioning defrost enters process
System, including acquisition module, comparison module and control module,
The acquisition module is used to acquire current compressor running frequency when meeting air-conditioning defrost condition；
The comparison module is obtained for comparing current compressor running frequency and preset shutdown frequency according to comparison result
It takes frequency reducing rate and stablizes the time；
The control module is stopped for controlling compressor and being down to according to the frequency reducing rate from current compressor running frequency
Unit frequency and with shut down described in frequency continuous service stablize the time after, it is out of service；And the time out of service reaches preset and stops
Only after the time, control compressor is run according to preset defrost frequency.
Further, the comparison module includes:
Computing unit, for determining current compressor running frequency and shutting down the difference of frequency；
Selecting unit, for corresponding steady according to determining difference selection frequency reducing rate and the frequency reducing rate
It fixes time.
Further, the comparison module further includes that related information table establishes unit, and the related information table establishes unit use
In the difference and frequency reducing rate that pre-establish current compressor running frequency and shutdown frequency, the related information table for stablizing the time；
The selecting unit obtains stabilization time of the difference under different frequency reducing rates by inquiring the related information table.
In order to solve the technical problem, the present invention also provides a kind of air-conditionings, enter including the air-conditioning defrost
The frequency control system of journey.
Detailed description of the invention
Fig. 1 is the flow diagram for the control method for frequency that 1 air-conditioning defrost of embodiment enters process；
Fig. 2 is the structural schematic diagram for the frequency control system that 2 air-conditioning defrost of embodiment enters process；
Fig. 3 is a kind of structural schematic diagram of the air-conditioning of embodiment 3.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figure 1, entering the flow diagram of the control method for frequency of process for air-conditioning defrost of the present invention, including following
Step:
Step 1, current compressor running frequency when meeting air-conditioning defrost condition is acquired；
Step 2, compare current compressor running frequency and preset shutdown frequency, frequency reducing rate is obtained according to comparison result
With stablize the time；
Step 3, control compressor according to the frequency reducing rate from current compressor running frequency be down to shut down frequency and with
It shuts down after stablizing the time described in frequency continuous service, it is out of service；
Step 4, after the time out of service reaches preset dwell time, control compressor is transported according to preset defrost frequency
Row.
The method of the present embodiment compares current compressor running frequency and preset when determining to need to enter defrost process
Shut down frequency.If current compressor running frequency is less than or equal to preset shutdown frequency, control compressor directly stops
Operation, and after preset dwell time, control compressor is run according to preset defrost frequency.If current compressor operation frequency
When rate is greater than preset shutdown frequency, when selecting suitable frequency reducing rate according to the height of current compressor running frequency and stablize
Between, it discharges the refrigerant pressure of frequency-conversion air-conditioning system sufficiently, matches tube vibration to reduce, avoid the danger for being piped disconnected pipe, simultaneously
Reduce noise, improve the air-conditioning experience sense of user by.
In the present embodiment, the step 2 specifically:
S201 determines current compressor running frequency and shuts down the difference of frequency；
S202 pre-establishes current compressor running frequency and shuts down the difference of frequency and frequency reducing rate, stablize the time
Related information table obtains stabilization of the difference calculated result under different frequency reducing rates by inquiring the related information table
Time.
In the related information table in the present invention, when current compressor running frequency is identical as the difference of frequency is shut down,
Frequency reducing rate is bigger, and the stable time is longer；When frequency reducing rate is identical, current compressor running frequency and shutdown frequency
Difference is bigger, and the stable time is longer.Current compressor running frequency and the difference for shutting down frequency are smaller, and frequency reducing rate is got over
Small, stablizing the time more levels off to 0.Meanwhile the value range of the frequency reducing rate is 1~5Hz/s；It is downconverted to from compressor starts
The total time that the stable time terminates is less than 45s, preferably less than 35s.
In the present embodiment, if compressor current operation frequency is 84Hz, as 30Hz, frequency reducing rate is the shutdown frequency set
2Hz/s, stablizing the time is 2s, then the frequency reducing time are as follows: (84Hz-30Hz)/(2Hz/s)=27s, total time are 27s+2s=
29s。
If compressor current operation frequency is 84Hz, for the shutdown frequency set as 30Hz, frequency reducing rate is 3Hz/s, is stablized
Time is 5s, then the frequency reducing time is (84Hz-30Hz)/(3Hz/s)=18s, and total time is 18s+5s=23s.
If compressor current operation frequency is 99Hz, for the shutdown frequency set as 30Hz, frequency reducing rate is 3Hz/s, is stablized
Time is 10s, then the frequency reducing time is (99Hz-30Hz)/(3Hz/s)=23s, and total time is 23s+10s=33s.
If compressor current operation frequency is 50Hz, for the shutdown frequency set as 30Hz, frequency reducing rate is 2Hz/s, is stablized
Time is 0s, then the frequency reducing time is (50Hz-30Hz)/(2Hz/s)=10s, and total time is 10s+0s=10s.
In other preferred embodiments, when current compressor running frequency and the difference of frequency is shut down as 50~60Hz, and
When frequency reducing rate is 1~2Hz/s, stablizing the time is 1~2s；When current compressor running frequency and the difference for shutting down frequency are 50
~60Hz, and frequency reducing rate be 3~5Hz/s when, stablize the time be 4~8s.When current compressor running frequency and shut down frequency
Difference be 60~70Hz, and frequency reducing rate be 3~5Hz/s when, stablize the time be 8~15s；When current compressor running frequency
With shut down frequency difference be 10~20Hz, and frequency reducing rate be 1~2Hz/s when, stablize the time be 0s.
As shown in Fig. 2, entering the structural schematic diagram of the frequency control system of process for 2 air-conditioning defrost of embodiment, including adopt
Collect module, comparison module and control module,
The acquisition module is used to acquire current compressor running frequency when meeting air-conditioning defrost condition；
The comparison module is obtained for comparing current compressor running frequency and preset shutdown frequency according to comparison result
It takes frequency reducing rate and stablizes the time；
The control module is stopped for controlling compressor and being down to according to the frequency reducing rate from current compressor running frequency
Unit frequency and with shut down described in frequency continuous service stablize the time after, it is out of service；And the time out of service reaches preset and stops
Only after the time, control compressor is run according to preset defrost frequency.
In the present embodiment, the comparison module includes:
Computing unit, for calculating current compressor running frequency and shutting down the difference of frequency；
Related information table establishes unit, for pre-establishing current compressor running frequency and shutting down the difference and drop of frequency
Frequency rate, the related information table for stablizing the time；The selecting unit obtains the difference and exists by inquiring the related information table
The stabilization time under different frequency reducing rates；
Selecting unit, for selecting frequency reducing rate and the frequency reducing rate corresponding stable time according to difference.
As shown in figure 3, being a kind of structural schematic diagram of the air-conditioning of embodiment 3, including above-described air-conditioning defrost entered
The frequency control system of journey.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. the control method for frequency that a kind of air-conditioning defrost enters process, which comprises the following steps:
Step 1, current compressor running frequency when meeting air-conditioning defrost condition is acquired；
Step 2, compare current compressor running frequency and preset shutdown frequency, according to comparison result acquisition frequency reducing rate and surely
It fixes time；
Step 3, control compressor is down to from current compressor running frequency according to the frequency reducing rate and shuts down frequency and to shut down
It is out of service after stablizing the time described in frequency continuous service；
Step 4, after the time out of service reaches preset dwell time, control compressor is run according to preset defrost frequency；
The step 2 specifically:
S201 determines current compressor running frequency and shuts down the difference of frequency；
S202, according to determining difference selection frequency reducing rate and the frequency reducing rate corresponding stable time；
When current compressor running frequency and the difference for shutting down frequency are 50~60Hz, and frequency reducing rate is 1~2Hz/s, surely
It fixes time as 1~2s；When current compressor running frequency and shut down frequency difference be 50~60Hz, and frequency reducing rate be 3~
When 5Hz/s, stablizing the time is 4~8s；
Alternatively, when current compressor running frequency and the difference for shutting down frequency are 60~70Hz, and frequency reducing rate is 3~5Hz/s
When, stablizing the time is 8~15s；When current compressor running frequency and the difference of frequency is shut down as 10~20Hz, and frequency reducing rate
When for 1~2Hz/s, stablizing the time is 0s.
2. the control method for frequency that air-conditioning defrost according to claim 1 enters process, which is characterized in that the S202 tool
Body are as follows: pre-establish current compressor running frequency and shut down the difference and frequency reducing rate, the related information for stablizing the time of frequency
Table obtains stabilization time of the difference under different frequency reducing rates by inquiring the related information table.
3. the control method for frequency that air-conditioning defrost according to claim 2 enters process, which is characterized in that the association letter
It ceases in table, when current compressor running frequency is identical as the difference of frequency is shut down, frequency reducing rate is bigger, and the stable time gets over
It is long；When frequency reducing rate is identical, current compressor running frequency is bigger with the difference for shutting down frequency, and the stable time is longer.
4. the control method for frequency that air-conditioning defrost according to claim 2 enters process, which is characterized in that the association letter
It ceases in table, current compressor running frequency and the difference for shutting down frequency are smaller, and frequency reducing rate is smaller, and the stable time more levels off to
0。
5. the control method for frequency that air-conditioning defrost according to any one of claims 1 to 4 enters process, which is characterized in that from
Compressor starts, which are downconverted to, the total time that the stable time terminates is less than 45s.
6. the control method for frequency that air-conditioning defrost according to claim 5 enters process, which is characterized in that opened from compressor
Begin to be downconverted to and the total time that the stable time terminates is less than 35s.
7. the frequency control system that a kind of air-conditioning defrost enters process, which is characterized in that including acquisition module, comparison module and control
Molding block,
The acquisition module is used to acquire current compressor running frequency when meeting air-conditioning defrost condition；
The comparison module is obtained according to comparison result and is dropped for comparing current compressor running frequency and preset shutdown frequency
Frequency rate and stablize the time；
The control module is down to shutdown frequency from current compressor running frequency according to the frequency reducing rate for controlling compressor
Rate and with shut down described in frequency continuous service stablize the time after, it is out of service；And the time out of service is when reaching preset stopping
Between after, control compressor run according to preset defrost frequency；
The comparison module includes:
Computing unit, for determining current compressor running frequency and shutting down the difference of frequency；
Selecting unit, for selecting frequency reducing rate and the frequency reducing rate corresponding stable time according to the difference；
When current compressor running frequency and the difference for shutting down frequency are 50~60Hz, and frequency reducing rate is 1~2Hz/s, surely
It fixes time as 1~2s；When current compressor running frequency and shut down frequency difference be 50~60Hz, and frequency reducing rate be 3~
When 5Hz/s, stablizing the time is 4~8s；
Alternatively, when current compressor running frequency and the difference for shutting down frequency are 60~70Hz, and frequency reducing rate is 3~5Hz/s
When, stablizing the time is 8~15s；When current compressor running frequency and the difference of frequency is shut down as 10~20Hz, and frequency reducing rate
When for 1~2Hz/s, stablizing the time is 0s.
8. the frequency control system that air-conditioning defrost according to claim 7 enters process, which is characterized in that the relatively mould
Block further includes that related information table establishes unit, and the related information table establishes unit for pre-establishing current compressor operation frequency
Rate and the difference and frequency reducing rate, the related information table for stablizing the time for shutting down frequency；The selecting unit is by inquiring the pass
Join information table, obtains stabilization time of the difference under different frequency reducing rates.
9. a kind of air-conditioning, it is characterised in that enter the frequency control system of process including air-conditioning defrost described in claim 7 or 8
System.
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| CN201610560587.0A CN106196449B (en) | 2016-07-13 | 2016-07-13 | A kind of air-conditioning defrost enters control method for frequency, system and the air-conditioning of process |
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| CN107560259B (en) * | 2017-09-01 | 2020-03-03 | 广东美的暖通设备有限公司 | Multi-split system and low-temperature starting control method and device of multi-split system |
| CN110513830A (en) * | 2019-08-05 | 2019-11-29 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning four-way valve reverse control method and control device and air-conditioning |
| CN110631210B (en) * | 2019-09-30 | 2021-07-16 | 广东美的制冷设备有限公司 | Air conditioner, method of controlling the same, and computer-readable storage medium |
| CN110657563B (en) * | 2019-10-08 | 2020-11-27 | 珠海格力电器股份有限公司 | Control method and device for low-temperature heating unit and multi-split air conditioner |
| CN112303813B (en) * | 2020-09-24 | 2021-09-24 | 青岛海信日立空调系统有限公司 | Air conditioner and air conditioner defrosting method |
| CN112902483A (en) * | 2021-01-28 | 2021-06-04 | 广东芬尼克兹节能设备有限公司 | Start-stop control method and device for cascade heat pump defrosting compressor |
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| KR20010028947A (en) * | 1999-09-28 | 2001-04-06 | 구자홍 | Defrost method in inverter air conditioner |
| JP5264647B2 (en) * | 2009-08-11 | 2013-08-14 | 三菱電機株式会社 | Air conditioner |
| CN104110775B (en) * | 2013-09-13 | 2017-02-08 | 广东美的制冷设备有限公司 | Frequency-conversion air conditioner operation control method and device |
| CN104748465A (en) * | 2013-12-27 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner defrosting control method, air conditioner defrosting control device and air conditioner |
| CN105020950B (en) * | 2015-07-15 | 2017-09-05 | 宁波奥克斯电气股份有限公司 | Multi-connected machine defrosting control method |
| CN105258301A (en) * | 2015-11-17 | 2016-01-20 | 广东美的制冷设备有限公司 | Air-conditioner and control method and device for compressor in air-conditioner |
| CN105698453A (en) * | 2016-03-09 | 2016-06-22 | 广东美的制冷设备有限公司 | Frequency conversion air conditioner and stop control method and stop control device for compressor of frequency conversion air conditioner |
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