CN108278740A - A kind of control method and device of convertible frequency air-conditioner auxiliary electrical heater - Google Patents
A kind of control method and device of convertible frequency air-conditioner auxiliary electrical heater Download PDFInfo
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- CN108278740A CN108278740A CN201710004776.4A CN201710004776A CN108278740A CN 108278740 A CN108278740 A CN 108278740A CN 201710004776 A CN201710004776 A CN 201710004776A CN 108278740 A CN108278740 A CN 108278740A
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Abstract
The present invention provides a kind of control method and device of convertible frequency air-conditioner auxiliary electrical heater, the control method includes：Heating booting, convertible frequency air-conditioner is in heating mode, and the auxiliary electrical heater of the compressor of the convertible frequency air-conditioner and the convertible frequency air-conditioner is opened；Obtain the instant output heating capacity Pt of air-conditioning, the maximum output heating capacity Pmax of electrical heating power P3 and air-conditioning；When meet Pmax >=（Pt+ P3）When, auxiliary electrical heater is stopped, at this point, total heating capacity of entire air-conditioning improves the running frequency of the frequency-changeable compressor when being exited according to auxiliary electrical heater, maintains total heating capacity constant.The present invention solves the problems, such as the fluctuations in indoor temperature when auxiliary electrical heater exits in the prior art, realizes and maintains that total heating capacity is constant when auxiliary electrical heater exits, improves the comfort that user uses.
Description
Technical field
The present invention relates to air-conditioning technical field, be specifically related to a kind of convertible frequency air-conditioner auxiliary electrical heater control method and its
Device.
Background technology
The compressor frequency of conventional inverter compressor is adjusted according to the difference of indoor temperature and set temperature（Have
A little products also have the parameters such as indoor coil pipe, outdoor environment temperature, outdoor coil temperature, delivery temperature, electric current that can also influence
Compressor frequency, typically protection are used）.
In air-conditioning heating, auxiliary electrical heater（Abbreviation auxiliary electrical heater）Use can improve air-conditioner set heating relax
Adaptive effect.Now illustrate compressor operating frequency, the situation of change of heating capacity and indoor temperature under convertible frequency air-conditioner several ways：
The first：Without auxiliary electrical heater.As shown in Figure 1, compressor operating frequency curve 11, heating capacity curve 12 and Indoor Temperature
The change curve 13 of degree.After starting of air conditioner, compressor frequency rapidly rises to f1（Compressor highest frequency）, corresponding air-conditioning system
Heat rises to P1 by 0（Maximum heating capacity）, indoor temperature is gradually increasing by T0；Continuous service for a period of time after because of interior
Circumstance temperature temperature is gradually increasing, and compressor frequency can be gradually reduced, and finally drop to f2（When without auxiliary electrical heater, reach mesh
Compressor operating frequency when marking temperature）When indoor temperature can be made to maintain essentially on target temperature T1, air-conditioning at this time accordingly
Export P2（Heating capacity when balance）Heating capacity, interior space institute calorific requirement is also P2.
Second：Auxiliary electrical heater is run always.As shown in Fig. 2, compressor operating frequency curve 21, heating capacity curve 22
And the change curve 23 of indoor temperature.After starting of air conditioner, because auxiliary electrical heater works, maximum heating capacity can reach P4（P4=
P3+ P1）；And because indoor circumstance temperature temperature rise obtains faster, t2（When auxiliary electrical heater is run always, reach needed for target temperature
Time）When indoor temperature can maintain essentially on target temperature T1, compressor frequency reaches f3 at this time（Auxiliary electrical heater is always
When operation, compressor operating frequency when reaching target temperature）, it will be apparent that reach t2 ＜ t1 the time required to target temperature, presses at this time
Contracting unit frequency f3 ＜ f2.In the case where outdoor environment is relatively more severe and when indoor temperature is not up to ownership goal temperature, open
Auxiliary electrical heater helps to improve leaving air temp, shortens heat balance time, improves air-conditioning comfort, still, Ci Zhongcao
Operation mode distinct disadvantage is that auxiliary electrical heater works always, is unfavorable for energy saving.
The third：Auxiliary electrical heater is out of service after reaching certain numerical value according to indoor temperature or coil temperature.Such as Fig. 3
It is shown, the change curve 33 of compressor operating frequency curve 31, heating capacity curve 32 and indoor temperature, in t3（Auxiliary electricity adds
Hot post-set time）When auxiliary electrical heater be stopped, heating capacity declines P3 immediately, and compressor frequency still maintains original trend at this time
Operation, heating capacity curve 32 fluctuate, and indoor temperature will rise to ease up and even decline, and can just be adjusted after waiting temperature parameters obviously to fluctuate
Whole increase compressor frequency；It is that fluctuations in indoor temperature is big that the problem of notch, bring in this way, which occurs, in heating capacity, and user uses comfortable
Property reduce.
In addition, the heating efficiency of auxiliary electrical heater is much lower compared with compressor of air conditioner heating efficiency, so air-conditioning auxiliary electrical
Heating will exit work on suitable opportunity, and no it will cause the wastes of the energy.
Chinese patent CN 104075405B disclose a kind of auxiliary heating means and a kind of assisted heating device, specifically
A kind of electrical auxiliary heater intelligently controlling convertible frequency air-conditioner is disclosed, the electrical auxiliary heater of pump type heat convertible frequency air-conditioner is enable
It adaptively opens and closes, to reduce energy consumption while ensureing that temperature is stablized indoors, reaches energy saving and improve user experience
Purpose, but there are still electrical heating frequently open with when exiting caused by fluctuations in indoor temperature it is big, reduce user use it is easypro
The problem of adaptive.
How to auxiliary electrical heater（Abbreviation auxiliary electrical heater）It is rationally controlled, while can be exited in auxiliary electrical heater
When maintain total heating capacity constant, to ensure the comfort level of user, currently no effective solution has been proposed.
In view of this, special propose the present invention.
Invention content
The purpose of the present invention is to provide a kind of control method of convertible frequency air-conditioner auxiliary electrical heater, the control method is real
Showed the reasonable control of auxiliary electrical heater, especially be to run through to improve the frequency-changeable compressor when auxiliary electrical heater exits
Running frequency, maintain total heating capacity constant.
To achieve the above object, the present invention uses following technical scheme：
A kind of control method of convertible frequency air-conditioner auxiliary electrical heater, the control method remain total when auxiliary electrical heater exits
Heating capacity is constant, it is characterised in that：The control method includes the following steps：
(1) heating booting, convertible frequency air-conditioner are in heating mode, and the compressor of the convertible frequency air-conditioner and the convertible frequency air-conditioner
Auxiliary electrical heater is opened；
(2) the instant output heating capacity Pt of air-conditioning, the maximum output heating capacity Pmax of electrical heating power P3 and air-conditioning are obtained；
（3）When meet Pmax >=（Pt+ P3）When, auxiliary electrical heater is stopped, at this point, whole when being exited according to auxiliary electrical heater
Total heating capacity of a air-conditioning improves the running frequency of the frequency-changeable compressor, maintains total heating capacity constant.
Further, step（2）The instant output heating capacity of middle acquisition is the heating of current frequency under Current Temperatures, wind speed
Amount, maximum output heating capacity are Current Temperatures, under wind speed, heating capacity when frequency maximum.
Further, the control method includes the following steps：When auxiliary electrical heater exits, according to preset heating capacity with
Correspondence between compressor operating frequency improves the running frequency of frequency-changeable compressor, maintains total heating capacity constant.
According to some embodiments of the present invention, a kind of control device of convertible frequency air-conditioner auxiliary electrical heater, control dress
Set including：
Data acquisition module obtains auxiliary for obtaining instant output heating capacity Pt of the air-conditioning under Current Temperatures, wind speed, frequency
Help the maximum output heating capacity Pmax of electrical heating power P3 and air-conditioning in Current Temperatures, wind speed, frequency maximum；
Processing module, for judging Current Temperatures, wind speed, maximum output heating capacity Pmax when frequency maximum whether be more than or
Equal to the instant output heating capacity Pt and the sum of auxiliary electrical heater power P 3 under Current Temperatures, wind speed, frequency；
Control module is controlled for the working condition to the auxiliary electrical heater；
Running frequency adjustment module, total heating capacity of entire air-conditioning adjusts the frequency-changeable compressor when being exited according to auxiliary electrical heater
Running frequency.
Further, the control module includes：
Unit is opened, auxiliary electrical heater is opened when for needing heating；
Closing unit, in heating operations when meet maximum output heating capacity Pmax be more than or equal to immediately output heating capacity
When the sum of Pt auxiliary electrical heaters power P 3, auxiliary electrical heater is closed.
Beneficial effects of the present invention：
For the present invention the study found that judge current temperature, wind speed, when frequency maximum, exports whether heating capacity Pmax is more than or waits
The sum of heating capacity Pt and auxiliary electrical heater power P 3 are exported under Current Temperatures, wind speed, frequency, to determine auxiliary electrical heater
Working condition, meet Pmax >=（Pt+ P3）When, auxiliary electrical heater is stopped, at this point, when being exited according to auxiliary electrical heater
The heating capacity Pmax of acquisition adjusts the running frequency of frequency-changeable compressor, and electrical heating is filled up in time by improving compressor operating frequency
Heat notch caused by exiting, to maintain total heating capacity constant, to keep the steady of indoor temperature, what raising user used relaxes
Adaptive.Meanwhile compared with the third convertible frequency air-conditioner pattern, the time that interior reaches target temperature is also shortened.
Description of the drawings
Fig. 1 is traditional simulation drawing without auxiliary electrical heater；
Fig. 2 is that auxiliary electrical heater is run always and no auxiliary electrical heater comparative simulation figure；
Fig. 3 is that traditional auxiliary electrical heater withdrawing mode runs always work comparative simulation figure with auxiliary electrical heater；
Fig. 4 is auxiliary electrical heater withdrawing mode of the present invention and traditional auxiliary electrical heater withdrawing mode work simulation figure；
Fig. 5 is the flow chart of the control method of the convertible frequency air-conditioner auxiliary electrical heater of the embodiment of the present invention；
Fig. 6 is the control device structure diagram of convertible frequency air-conditioner auxiliary electrical heater of the present invention.
Reference numeral：
11, compressor operating frequency change curve (no auxiliary electrical heater)；12, heating capacity change curve (no auxiliary electrical heater)
；13, the change curve (no auxiliary electrical heater) of indoor temperature；21, (auxiliary electrical heater is always for compressor operating frequency change curve
Operation)；22, heating capacity change curve (auxiliary electrical heater is run always)；23, (auxiliary electricity adds the change curve of indoor temperature
Heat is run always)；31, compressor operating frequency change curve (traditional auxiliary electrical heater withdrawing mode)；32, quantitative change is heated
Change curve (traditional auxiliary electrical heater withdrawing mode)；33, (traditional auxiliary electrical heater exits the change curve of indoor temperature
Mode)；41, compressor operating frequency change curve (auxiliary electrical heater withdrawing mode of the present invention)；42, heating capacity change curve
(auxiliary electrical heater withdrawing mode of the present invention)；43, the change curve (auxiliary electrical heater withdrawing mode of the present invention) of indoor temperature；
101, data acquisition module；102, processing module；103, control module；104, running frequency adjustment module.
Specific implementation mode
Embodiment 1
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clearly and completely
Description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of not making the creative labor
Example, shall fall within the protection scope of the present invention.
A kind of control of the convertible frequency air-conditioner auxiliary electrical heater proposed according to embodiments of the present invention described with reference to the accompanying drawings
Method.
As shown in figure 4, the control method of the convertible frequency air-conditioner auxiliary electrical heater of the embodiment of the present invention includes the following steps：
S1, heating booting, convertible frequency air-conditioner are in heating mode, and the compressor of the convertible frequency air-conditioner and the convertible frequency air-conditioner is auxiliary
It helps electrical heating to be opened, executes step S2；
S2 obtains instant output heating capacity Pt of the air-conditioning under Current Temperatures, wind speed, frequency, obtains auxiliary electrical heater power P 3
And air-conditioning Current Temperatures, wind speed, maximum output heating capacity Pmax when frequency maximum execute step S3；
S3, judges whether Pmax is more than or equal to the sum of Pt and P3；If so, thening follow the steps S4；If it is not, then executing step
Rapid S2 continues to detect；
S4, auxiliary electrical heater are stopped, at this point, described in total heating capacity of entire air-conditioning improves when being exited according to auxiliary electrical heater
The running frequency of frequency-changeable compressor.
In the above-described embodiments, after auxiliary electrical heater is stopped, when auxiliary electrical heater exits, according to preset heating capacity
Correspondence between compressor operating frequency adjusts the running frequency of frequency-changeable compressor, maintains total heating capacity constant.This
Afterwards, continuous service is gradually increasing after for a period of time because of indoor circumstance temperature temperature, and compressor frequency gradually tends towards stability, air conditioner it is defeated
Go out heating capacity and also tend to balance heating capacity, reaches indoor required temperature.
In one embodiment of the invention, heating wire is filled for pipe such as auxiliary electrical heater, heating power is constant can be by setting
Meter directly learns P=U2/R；If auxiliary electrical heater is PTC, then measured in advance difference indoor environment temperature, different coil temperature, no
With its heating power under wind speed, it is stored in controller for tabling look-up.
Pmax is pushed away according under measured in advance difference indoor environment temperature, outdoor environment temperature, different wind speed, different frequency
The heating capacity of calculating is stored in controller for tabling look-up.Pt is also to be extrapolated according to different temperatures, wind speed and frequency
Heating capacity, specifically, how to measure these numerical value and conversion relation is the prior art, the present invention repeats no more.
Above-mentioned steps are illustrated below：
The electrical heating power of convertible frequency air-conditioner is at this time：2000W（P3）；
Air-conditioning is under Current Temperatures, wind speed, and the actual motion frequency of compressor is 50Hz, and corresponding instant output heating capacity is
5000W (Pt), it should be noted that specific heating capacity data are the numerical value extrapolated according to environment temperature, frequency, similarly hereinafter；
Air-conditioning is under Current Temperatures, wind speed, and the maximum frequency that compressor allows is 55Hz, and corresponding maximum output heating capacity is
5500W(Pmax)；
Due to 5500W<7000W, then electrical heating at this time cannot be exited；Continue to obtain output heating capacity immediately, after a period of time
（It can be calculated as unit of 20s primary）, when meet Pmax >=（Pt+ P3）When, electrical heating is stopped, if at this time total
Heating capacity is 5500 W, and the running frequency of compressor is improved according to preset output heating capacity, maintains total heating capacity constant.This
Sample indoor temperature is not exited substantially by auxiliary electrical heater to be influenced, and avoids the fluctuation of indoor temperature, and interior reaches target
The time of temperature does not also extend, and has built comfortable environment.
Based on same inventive concept, a kind of control dress of convertible frequency air-conditioner auxiliary electrical heater is additionally provided in the embodiment of the present invention
It sets, as described in the following examples.Since the principle that the control device of convertible frequency air-conditioner auxiliary electrical heater solves the problems, such as is controlled with it
Method is similar, therefore the implementation of the control device of convertible frequency air-conditioner auxiliary electrical heater may refer to the control of convertible frequency air-conditioner auxiliary electrical heater
The implementation of method processed, overlaps will not be repeated.Used below, predetermined work(may be implemented in term " unit " or " module "
The combination of the software and/or hardware of energy.It is hard although device described in following embodiment is preferably realized with software
The realization of the combination of part or software and hardware is also that may and be contemplated.Fig. 6 is the control of convertible frequency air-conditioner auxiliary electrical heater
A kind of structure diagram of device, as shown in fig. 6, the control device includes:Data acquisition module 101, processing module 102,
Control module 103, running frequency adjustment module 104, are below described in detail the structure.
Data acquisition module 101, for obtaining instant output heating capacity Pt of the air-conditioning under Current Temperatures, wind speed, frequency,
Obtain the maximum output heating capacity Pmax of auxiliary electrical heater power P 3 and air-conditioning in Current Temperatures, wind speed, frequency maximum；
Processing module 102, for judging Current Temperatures, wind speed, whether maximum output heating capacity Pmax when frequency maximum is more than
Or equal to exporting the sum of heating capacity Pt and auxiliary electrical heater power P 3 immediately under Current Temperatures, wind speed, frequency；
Control module 103 is controlled for the working condition to the auxiliary electrical heater；
Running frequency adjustment module 104, total heating capacity of entire air-conditioning adjusts the frequency conversion pressure when being exited according to auxiliary electrical heater
The running frequency of contracting machine.
In one embodiment, control module 103 may include：Unit is opened, is opened when for needing heating
Auxiliary electrical heater；Closing unit, for defeated more than or equal to immediately when meeting maximum output heating capacity Pmax in heating operations
When going out the sum of heating capacity Pt auxiliary electrical heaters power P 3, auxiliary electrical heater is closed.
Specific working method and principle：
As Figure 4-Figure 6, heating booting first, when convertible frequency air-conditioner is in heating mode, in the process of running, data acquisition module
101 can obtain output heating capacity Pt, auxiliary electrical heater power P 3, maximum output heating capacity Pmax immediately in real time, by above-mentioned signal
It is sent to processing module 102, processing module 102 is according to the formula of setting：Pmax≥（Pt+ P3）Judged, it is above-mentioned meeting
When relationship, signal-off auxiliary electrical heater is sent out to control module 103, meanwhile, running frequency adjustment module 104 is according to auxiliary electricity
The total heating capacity for heating entire air-conditioning when exiting adjusts the running frequency of the frequency-changeable compressor.Specifically, as shown in figure 4, pressure
The change curve 43 of contracting machine running frequency curve 41, heating capacity curve 42 and indoor temperature.As indoor circumstance temperature temperature is gradual
Rise, compressor frequency is gradually reduced, and is set in t5（Under auxiliary electrical heater withdrawing mode of the present invention, auxiliary electrical heater stops work
The time of work）When the time, meet Pmax >=（Pt+ P3）, auxiliary electrical heater is stopped, then heating capacity declines P3 immediately, works as electricity
The heating capacity of heating entire air-conditioning when being exited immediately according to auxiliary electrical heater after stopping adjusts compressor operating frequency, passes through raising
Compressor operating frequency fills up heat notch caused by electrical heating is exited in time, maintains total heating capacity constant.Such indoor temperature
Substantially not exited by auxiliary electrical heater is influenced, and the fluctuation of indoor temperature, and the indoor time for reaching target temperature are avoided
Also do not extend, create comfortable environment.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made by
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of control method of convertible frequency air-conditioner auxiliary electrical heater, the control method remains total when auxiliary electrical heater exits
Heating capacity it is constant, it is characterised in that：The control method includes the following steps：
(1) heating booting, convertible frequency air-conditioner are in heating mode, and the compressor of the convertible frequency air-conditioner and the convertible frequency air-conditioner
Auxiliary electrical heater is opened；
(2) the instant output heating capacity Pt of air-conditioning, the maximum output heating capacity Pmax of electrical heating power P3 and air-conditioning are obtained；
（3）When meet Pmax >=（Pt+ P3）When, auxiliary electrical heater is stopped, at this point, whole when being exited according to auxiliary electrical heater
Total heating capacity of a air-conditioning improves the running frequency of the frequency-changeable compressor, maintains total heating capacity constant.
2. control method according to claim 1, it is characterised in that：Step（2）The instant output heating capacity of middle acquisition is
Under Current Temperatures, wind speed, the heating capacity of current frequency, maximum output heating capacity is Current Temperatures, under wind speed, when frequency maximum
Heating capacity.
3. control method according to claim 1, it is characterised in that：The control method includes the following steps：Auxiliary
When electrical heating is exited, according to the correspondence between preset heating capacity and compressor operating frequency, frequency-changeable compressor is improved
Running frequency maintains total heating capacity constant.
4. a kind of control device of convertible frequency air-conditioner auxiliary electrical heater, it is characterised in that：The control device includes：
Data acquisition module（101）, for obtaining instant output heating capacity Pt of the air-conditioning under Current Temperatures, wind speed, frequency, obtain
Take the maximum output heating capacity Pmax of auxiliary electrical heater power P 3 and air-conditioning in Current Temperatures, wind speed, frequency maximum；
Processing module（102）, for judging Current Temperatures, wind speed, whether maximum output heating capacity Pmax when frequency maximum is big
In or equal to the sum of instant output heating capacity Pt under Current Temperatures, wind speed, frequency and auxiliary electrical heater power P 3；
Control module（103）, controlled for the working condition to the auxiliary electrical heater；
Running frequency adjustment module（104）, total heating capacity of entire air-conditioning adjusts the frequency conversion when being exited according to auxiliary electrical heater
The running frequency of compressor.
5. control device according to claim 4, it is characterised in that：The control module（103）Including：
Unit is opened, auxiliary electrical heater is opened when for needing heating；
Closing unit, in heating operations when meet maximum output heating capacity Pmax be more than or equal to immediately output heating capacity
When the sum of Pt auxiliary electrical heaters power P 3, auxiliary electrical heater is closed.
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| CN201710004776.4A CN108278740B (en) | 2017-01-04 | 2017-01-04 | Control method and device for auxiliary electric heating of variable frequency air conditioner |
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| CN201710004776.4A CN108278740B (en) | 2017-01-04 | 2017-01-04 | Control method and device for auxiliary electric heating of variable frequency air conditioner |
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Cited By (4)
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| CN109520089A (en) * | 2018-11-23 | 2019-03-26 | 奥克斯空调股份有限公司 | A kind of air-conditioning auxiliary electrical heater control method, device and air conditioner |
| CN109708269A (en) * | 2019-02-25 | 2019-05-03 | 珠海格力电器股份有限公司 | air conditioner and electric heater control method, device and equipment thereof |
| CN109855264A (en) * | 2018-12-27 | 2019-06-07 | 奥克斯空调股份有限公司 | Auxiliary electric heater unit Failure Control method, apparatus, air conditioner and storage medium |
| WO2021175202A1 (en) * | 2020-03-03 | 2021-09-10 | 青岛海尔空调电子有限公司 | Heating control method for variable-frequency air conditioner, and variable-frequency air conditioner |
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| WO2021175202A1 (en) * | 2020-03-03 | 2021-09-10 | 青岛海尔空调电子有限公司 | Heating control method for variable-frequency air conditioner, and variable-frequency air conditioner |
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| CN108278740B (en) | 2020-12-01 |
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