CN1274065A - Method of preventing air conditioner from overheat - Google Patents
Method of preventing air conditioner from overheat Download PDFInfo
- Publication number
- CN1274065A CN1274065A CN00100659A CN00100659A CN1274065A CN 1274065 A CN1274065 A CN 1274065A CN 00100659 A CN00100659 A CN 00100659A CN 00100659 A CN00100659 A CN 00100659A CN 1274065 A CN1274065 A CN 1274065A
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- Prior art keywords
- temperature
- indoor heat
- heat converter
- compressor
- frequency
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000007423 decrease Effects 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a method of preventing air conditioner from overheat. In this case, it is judged whether the temperature of the indoor heat exchanger has increased above a fall temperature due to the heating overload conditions or not. Then, when the judgment result is YES, a frequency obtained by decreasing the operating frequency before the fall temperature by a specific frequency is set to be a maximum frequency of the compressor, and when the temperature of the indoor heat exchanger has decreased below a released temperature, and it is judged that it has taken a required time for the fall, a frequency obtained by increasing the frequency by a specific frequency from the limitation maximum frequency is set to be a maximum frequency again and higher than the determinative maximum frequency perdetermined value in the second step. This method prevents the noise of a compressor effectively.
Description
The present invention relates to a kind of frequency conversion type air conditioner, especially relates to a kind of method that prevents that air conditioner is overheated.Such air conditioner changes the operating frequency of its compressor arbitrarily according to refrigeration or heating capacity, and when superheat state occurring, the operating frequency by the limit compression machine prevents the noise that the operating frequency because of the change compressor produces.
Usually, the compressor of frequency conversion type air conditioner is when heating, and as shown in Figure 1, if the temperature of indoor heat converter (Tp) is lower than release temperature, the operating frequency of compressor can continue to keep the state that heats.Yet when the temperature (Tp) of indoor heat converter surpassed release temperature, the operating frequency of compressor remained on working level, thus the further rising of limit temperature.On the other hand, if temperature (Tp) continues to raise when surpassing the decline temperature, then cause occurring superheat state, with reducing the operating frequency of compressor, in order to avoid damaged.
At this moment, if the operating frequency of compressor drops to certain level, and the temperature of indoor heat converter (Tp) is when beginning to reduce, and compressor can stop to reduce its operating frequency and remaining in the proper range.On the other hand, when the temperature (Tp) of indoor heat converter is reduced to release temperature when following, compressor changes according to the temperature (Tp) of indoor heat converter and increases its operating frequency, so that constantly regulate and control its operating frequency.
Yet there is certain problem in the overheated method that prevents of traditional frequency conversion type air conditioner.When superheating phenomenon takes place (the indoor and outdoors temperature is higher than 25 ℃ and 20 ℃ respectively), the temperature (Tp) that constantly raises because of indoor heat converter makes the compressor internal pressure surpass its maximum safety pressure power 27kg/cm
2Thereby, reduced the reliability of compressor; And compressor is once and again regulated and control its operating frequency under superheat state, causes the operating frequency lifting repeatedly of compressor, not only produces noise, and the heating capacity generation deviation of air conditioner.
Purpose of the present invention is exactly in order to address the above problem, and a kind of method that prevents that air conditioner is overheated is provided.This method is when occurring heating the excess load phenomenon, the operating frequency of compressor is limited in maximum horizontal, operating frequency when being this compression mechanism thermal overload is lower than 2 hertz, thereby make the number of times of compressor operating frequency lifting and the deviation of heating capacity of air conditioner reduce to minimum, to prevent the generation of noise.
For realizing purpose of the present invention, the invention provides a kind of method of excess load when preventing air conditioner heat-production.When air conditioner heat-production, regulate and control the operating frequency of its compressor according to the variations in temperature of indoor heat converter.This method comprises the steps:
Whether the temperature of differentiating indoor heat converter is owing to superheat state surpasses the decline temperature;
When the indoor heat converter temperature is higher than the decline temperature, be lower than indoor heat converter to reach decline temperature temperature value before, the operating frequency of coming the maximum constraints compressor by default one;
Whether the temperature of differentiating indoor heat converter is lower than release temperature;
Whether the temperature of differentiating indoor heat converter continued to be lower than release temperature in the section at the fixed time before dropping to release temperature from the decline temperature; And
Through behind the predetermined amount of time, preset the compressor maximum operation frequency again, and be higher than maximum operation frequency one predetermined value defined in second step.
Fig. 1 represents that the regulation and control of the operating frequency of compressor depend on the temperature changing curve diagram of traditional indoor heat converter;
Fig. 2 is the block diagram of the air conditioning frequency converter that embodiments of the invention provided;
Fig. 3 is a driven compressor line map provided by the invention;
Fig. 4 is the process flow chart of excess load when preventing air conditioner heat-production provided by the invention; And
Fig. 5 depends on the temperature changing curve diagram of indoor heat converter for the operating frequency of expression compressor provided by the invention.
Hereinafter with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.Shown in Fig. 2,3, rectifier 3 will change into direct current by the alternating current of power input 1 supply through rectification, smoothing.Power supply unit 5 becomes the direct current that rectifier 3 transforms into set direct voltage (DC5V is the driving power that is used for microcomputer, and DC12V is the driving power that is used to load).
In addition, frequency converter 11 alternately opens and closes 6 power transistor TR1-TR6, with the drive signal sent at frequency conversion drive parts 9 with the direct current of rectifier 3 outputs be transformed to three-phase (the U phase, V mutually and W mutually) supply compressor 13 behind the alternating current.Temperature detection part 15 is thermistor(-ter)s, is monitoring the variations in temperature of indoor and outdoor temperature and indoor heat converter.
Below introduce by this principle form prevent air conditioner heat-production the time overheated method.Rectifier 3 is transformed into direct current with the alternating current of power input 1 input, after direct current is transported to power supply unit 5, convert 5V respectively to for microcomputer driving power that starts idle call and 12V load driving power, and offer control device 7 frequency conversion drive parts 9 respectively.Control device 7 carries out initialization with air conditioner after receiving the direct voltage (microcomputer driving power) of power supply unit 5 conveyings.
At this moment, the user is if set the words of required working method and temperature T s with remote controller buttons or indoor set control board, control device 7 determines the operating frequency of compressor 13, and sends inverter drive signal PWM according to outdoor situations with on the basis of indoor set instruction.
Frequency conversion drive parts 9 strengthen the signal PWM that control device 7 are sent, and alternately open and close six power transistor TR1-TR6, and the direct current that rectifier 3 is carried just becomes the required three-phase alternating current of running compressor 13.
In other words, frequency converter 11 provides compressor 13 operating frequencies and relevant voltage according to refrigeration or heating capacity, and air conditioner is required for starting, and compressor 13 is driven by required operating frequency.
At this moment, the operating frequency of compressor 13 constantly changes according to the variations in temperature of indoor heat converter.In case superheat state (25 ℃ of indoor temperature, outdoor temperature is above 20 ℃) occurs, the temperature of indoor heat converter is owing to compressor 13 ever-increasing interior pressures raise, and so-called superheat state promptly appears in the lifting repeatedly in the short time of the operating frequency of compressor 13.
When superheat state occurring, the operating frequency by limit compression machine 13 prevents that superheat state from taking place, and sees shown in Figure 4.
Fig. 4 is according to the flow chart that prevents air conditioner heat-production excess load operation provided by the invention.Reference symbol S among Fig. 4 represents a step.
At first, compressor 13 is in heating the driving process, and the temperature Tp of indoor heat converter is monitored by temperature detection part 15, whether is lower than release temperature (about 53 ℃, default by control device) to measure it, sees Fig. 5.If be lower than release temperature, increase the operating frequency of compressor 13, reach release temperature until the temperature (Tp) of indoor heat converter.When surpassing release temperature, stop to increase the operating frequency of compressor 13, keep the work at present level.
In step 1, whether control device 7 distinguishes the temperature (Tp) of indoor heat converter owing to superheat state continues to raise, and surpasses decline temperature (about 60 ℃ is default by control device), referring to Fig. 5.
The result who distinguishes according to step S1, if the temperature Tp of indoor heat converter remains on (situation NO) under the decline temperature, compressor 13 keeps the work at present frequencies, and repeats the program of S1, is higher than the decline temperature until the temperature (Tp) of indoor heat converter.
On the other hand, according to the result that step S1 judges, if indoor heat converter temperature (Tp) is higher than decline temperature (situation YES), flow process enters step S2, and this timed unit 7 distinguishes the excess load phenomenon whether occurs heating.Therefore, before indoor heat converter temperature (Tp) is higher than the decline temperature just, the operating frequency of compressor reduces by 2 hertz (the initialization frequency of compressor is referring to Fig. 5), with the maximum operation frequency (first maximum operation frequency of compressor is referring to Fig. 5) that reaches compressor 13.At this moment, begin counting in 10 minutes the predetermined amount of time.
Among the following step S3, see Fig. 5, the operating frequency of compressor descends with protection compressor 13, drops under the decline temperature until the temperature (Tp) of indoor heat converter.Among the step S4, control device 7 distinguishes whether the temperature of indoor heat converter continues to be reduced to below the decline temperature according to the maximum operation frequency of compressor 13 reductions.
The result that distinguishes according to step S4, if indoor heat converter temperature (Tp) still is higher than decline temperature (situation NO), flow process is returned step S3, and the operation before the repeating step S3, the operating frequency of compressor 13 continue to be descended, be lower than the decline temperature until the temperature Tp of indoor heat converter.
On the other hand, according to the resolution result of step S4, if the temperature Tp of indoor heat converter is lower than decline temperature (situation YES), flow process enters step S5.At this moment, compressor 13 stops to reduce its operating frequency, and keeps its present level.
Therefore, among the step S6, control device 7 distinguishes that whether the temperature Tp of indoor heat converter continues to be reduced under the release temperature, sees Fig. 5.
According to the judgement of step S6, if the indoor heat converter temperature Tp is higher than release temperature (situation NO), flow process changes step S6 over to.This timed unit 7 continues timing, and returns step S5, and the flow process before the repeating step S5.
Judgement according to step S6, if the temperature (Tp) of indoor heat converter falls to release temperature following (situation YES), flow process enters S7, and whether control device 7 had measured when the inner heat exchanger temperature Tp heats up when surpassing the decline temperature and is brought down below release temperature 10 minutes.As less than 10 minutes (situation NO), flow process enters S7, and control device 7 increases its required time.
According to the judgement of step S7, if surpassed 10 minutes (situation YES), flow process enters step S8.Whether control device 7 mensuration heat the overheated state of a control that causes by excess load and remove, and on compressor initialization frequency basis, reset its operating frequency, make it to be higher than and heat 2 hertz of the maximum operation frequencies (first maximum operation frequency of compressor) that excess load limits among the step S2.
Among the following step S9, the frequency of compressor 13 raises, and (Tp) is higher than release temperature until the indoor heat converter temperature, referring to Fig. 5.Among the step S10, the frequency whether control device 7 resolution indoor heat converter temperature (Tp) raise with compressor 13 raises, and is higher than release temperature.
Result of determination according to step S10, if the temperature (Tp) of indoor heat converter is lower than release temperature (situation NO), flow process is returned S9, continues to increase the frequency of compressor 13, (Tp) begins to be higher than release temperature until the indoor heat converter temperature, and repeats the operation behind the S9.
Simultaneously, according to the result of determination of step S10, if the temperature (Tp) of indoor heat converter is higher than release temperature (situation YES), flow process changes step S11 over to, and the frequency of limit compression machine 13 rises, and keeps its work at present frequency as shown in Figure 5.Flow process is returned step S1, repeats operation thereafter.
Among the step S7, if cross 10 minutes (situation NO), control device 7 distinguishes that excess load heats releasing of excess load control under the state, change step S9 over to, increase the frequency of compressor 13, see Fig. 5, (Tp) is higher than release temperature until the indoor heat converter temperature, and repeats the operation behind the S9.
As mentioned above, excess load no matter when occurs and heat phenomenon, be indoor heat converter temperature (Tp) when being higher than the decline temperature, the maximum operation frequency of compressor (first, second, third maximum operation frequency ...), be restricted to low 2 hertz of frequency when reaching the decline temperature.Referring to Fig. 5, thereby the lifting number of times of compressor operating frequency has been reduced.
In addition, the given time section is by crossing first, second, third of compressor that thermal control limited ... maximum operation frequency can change when surpassing 10 minutes, and the operating frequency of compressor returns initial level, so the operating efficiency of compressor 13 improves.
The air-conditioner that prevents provided by the invention is crossed the advantage of by the use of thermal means and is, when finding superheating phenomenon The time, just before it takes place, the maximum operation frequency of compressor is set at than work at present frequently Rate is low 2 hertz, thereby it is minimum that the number of times of compressor frequency lifting is reduced to, and prevents that compressor from producing Give birth to noise, reduced the deviation of heating capacity of air conditioner.
Claims (5)
1. method that prevents that air conditioner is overheated is characterized in that air conditioner according to the indoor heat converter variations in temperature and continuous operating frequency of conversion compressor in the process of heating, and comprises the steps:
Whether the temperature of judging indoor heat converter is owing to superheat state surpasses the decline temperature;
When the indoor heat converter temperature is higher than the decline temperature, is lower than the indoor heat converter temperature and reaches the maximum operation frequency that the decline temperature value comes the limit compression machine by preestablishing one;
Whether the temperature of differentiating indoor heat converter is lower than release temperature;
Whether the temperature of differentiating indoor heat converter continues to be lower than release temperature in the section at the fixed time before falling to release temperature from the decline temperature; And
Through behind the predetermined amount of time, preset the compressor maximum operation frequency again, and be higher than maximum operation frequency one predetermined value defined in second step.
2. according to the method that prevents described in the claim 1 that air conditioner is overheated, it is characterized in that comprising the step of conversion compressor operating frequency, when the indoor heat converter temperature is higher than the decline temperature,, make it be lower than the decline temperature by reducing the temperature Tp of indoor heat converter; When the temperature of indoor heat converter is lower than the decline temperature, then stop to reduce to keep the work at present level.
3. prevent the method that air conditioner is overheated according to described in claim 1 or 2, the temperature that it is characterized in that working as indoor heat converter when not reducing under the release temperature, is then removed gate time in the release temperature discriminating step.
4. prevent the method that air conditioner is overheated described in the claim 1, it is characterized in that compressor predetermined work Frequency and Amplitude scope is: the 1-3 hertz.
5. claim 1 or the 4 described methods that prevent that air conditioner is overheated is characterized in that predetermined amount of time is 5-15 minute.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990017349A KR100353025B1 (en) | 1999-05-14 | 1999-05-14 | heating over-load control method of air conditoiner |
| KR9917349 | 1999-05-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1274065A true CN1274065A (en) | 2000-11-22 |
| CN1120963C CN1120963C (en) | 2003-09-10 |
Family
ID=19585525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00100659A Expired - Fee Related CN1120963C (en) | 1999-05-14 | 2000-01-26 | Method of preventing air conditioner from overheat |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3194919B2 (en) |
| KR (1) | KR100353025B1 (en) |
| CN (1) | CN1120963C (en) |
| IT (1) | IT1307598B1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971589A (en) * | 2010-08-06 | 2013-03-13 | 三菱重工业株式会社 | Refrigerator controller |
| CN105444330A (en) * | 2014-08-06 | 2016-03-30 | 青岛海尔科技有限公司 | Method and device used for adjusting operating frequency of compressor and an air conditioner of compressor |
| CN105987484A (en) * | 2015-02-28 | 2016-10-05 | 青岛海尔空调器有限总公司 | Defrosting control method and system used during heating frequent high-temperature prevention protection of air conditioner |
| CN106152382A (en) * | 2015-04-01 | 2016-11-23 | 青岛海尔空调器有限总公司 | A kind of control method preventing frequency of air condition compressor to fluctuate and system |
| CN107388661A (en) * | 2017-07-27 | 2017-11-24 | 广东美的制冷设备有限公司 | Solar air-conditioner system and its Poewr control method and device |
| WO2018000680A1 (en) * | 2016-06-28 | 2018-01-04 | 海信科龙电器股份有限公司 | Active control method and device for inverter air conditioner |
| CN112856744A (en) * | 2019-11-28 | 2021-05-28 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and readable storage medium |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101122080B1 (en) * | 2005-03-21 | 2012-03-15 | 엘지전자 주식회사 | Control method for air conditioner |
| CN101539151B (en) * | 2008-03-18 | 2013-06-12 | 海尔集团公司 | Method and device for controlling inverter compressor |
| JP2015114051A (en) * | 2013-12-11 | 2015-06-22 | 株式会社東芝 | Air conditioning system |
| CN105042807B (en) * | 2015-09-07 | 2017-11-28 | 珠海格力电器股份有限公司 | The method and apparatus for detecting convertible frequency air-conditioner running status |
| CN108859653B (en) * | 2018-04-03 | 2020-10-23 | 浙江吉利控股集团有限公司 | Electric automobile air conditioner control method and system |
| KR102041395B1 (en) * | 2018-05-09 | 2019-11-27 | 주창희 | Compression type cooling control system, and compressor type cooling control method using the same |
| CN113280488B (en) * | 2021-05-31 | 2023-04-25 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and computer storage medium |
| CN115751600A (en) * | 2022-11-25 | 2023-03-07 | 青岛海尔空调器有限总公司 | Control method and device of air conditioner and air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0143216B1 (en) * | 1993-03-15 | 1998-08-01 | 김광호 | Operating device and method of airconditioner |
| KR19980028560A (en) * | 1996-10-23 | 1998-07-15 | 구자홍 | Compressor control method in case of heating overload of air conditioner |
-
1999
- 1999-05-14 KR KR1019990017349A patent/KR100353025B1/en not_active IP Right Cessation
- 1999-11-09 JP JP31878699A patent/JP3194919B2/en not_active Expired - Fee Related
- 1999-11-12 IT IT1999RM000698A patent/IT1307598B1/en active
-
2000
- 2000-01-26 CN CN00100659A patent/CN1120963C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971589A (en) * | 2010-08-06 | 2013-03-13 | 三菱重工业株式会社 | Refrigerator controller |
| CN102971589B (en) * | 2010-08-06 | 2015-09-16 | 三菱重工业株式会社 | Control of Chiller device |
| CN105444330A (en) * | 2014-08-06 | 2016-03-30 | 青岛海尔科技有限公司 | Method and device used for adjusting operating frequency of compressor and an air conditioner of compressor |
| CN105444330B (en) * | 2014-08-06 | 2018-09-25 | 青岛海尔科技有限公司 | Method, apparatus for adjusting compressor operating frequency and its air-conditioning |
| CN105987484A (en) * | 2015-02-28 | 2016-10-05 | 青岛海尔空调器有限总公司 | Defrosting control method and system used during heating frequent high-temperature prevention protection of air conditioner |
| CN105987484B (en) * | 2015-02-28 | 2019-01-11 | 青岛海尔空调器有限总公司 | Defrosting control method and system when the frequent high temperature-proof of air-conditioning heating is protected |
| CN106152382A (en) * | 2015-04-01 | 2016-11-23 | 青岛海尔空调器有限总公司 | A kind of control method preventing frequency of air condition compressor to fluctuate and system |
| CN106152382B (en) * | 2015-04-01 | 2019-05-31 | 青岛海尔空调器有限总公司 | A kind of control method and system for preventing frequency of air condition compressor to fluctuate |
| WO2018000680A1 (en) * | 2016-06-28 | 2018-01-04 | 海信科龙电器股份有限公司 | Active control method and device for inverter air conditioner |
| CN107388661A (en) * | 2017-07-27 | 2017-11-24 | 广东美的制冷设备有限公司 | Solar air-conditioner system and its Poewr control method and device |
| CN112856744A (en) * | 2019-11-28 | 2021-05-28 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and readable storage medium |
| CN112856744B (en) * | 2019-11-28 | 2022-09-27 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3194919B2 (en) | 2001-08-06 |
| JP2000337685A (en) | 2000-12-08 |
| IT1307598B1 (en) | 2001-11-14 |
| ITRM990698A1 (en) | 2001-05-12 |
| ITRM990698A0 (en) | 1999-11-12 |
| KR20000073809A (en) | 2000-12-05 |
| CN1120963C (en) | 2003-09-10 |
| KR100353025B1 (en) | 2002-09-16 |
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Granted publication date: 20030910 Termination date: 20100228 |