CN1091238C - Defrosting method for heat pump type air conditioner - Google Patents
Defrosting method for heat pump type air conditioner Download PDFInfo
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- CN1091238C CN1091238C CN97103196A CN97103196A CN1091238C CN 1091238 C CN1091238 C CN 1091238C CN 97103196 A CN97103196 A CN 97103196A CN 97103196 A CN97103196 A CN 97103196A CN 1091238 C CN1091238 C CN 1091238C
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- temperature
- interior conduit
- gap
- minute
- air capacity
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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)
- Defrosting Systems (AREA)
Abstract
A defrosting method for hot-pump air-condition includes the following steps: the first temperature measured step that measures the temperature difference between a temperature TE1 of an indoor pipe of an air conditioner and a suction temperature TR1 after the lapse of m1 minutes from the start of heating operation; the second temperature measured step that measures the temperature difference between a temperature TE2 of an indoor pipe of an air conditioner and a suction temperature TR2 after the lapse of m2 minutes from the start of heating operation; defrosting step that compares the respective difference values with reference values and performing defrosting operation on the basis of judgement.
Description
The present invention relates to the Defrost method of heat pump type air conditioner, particularly relate to have can sensing chamber's outer heat-exchanger on the frosting situation, with can be with the heating work pattern, with being arranged on the method that temperature sensor in the in-room switch and indoor temperature transmitter start defrost operation.
Fig. 1 shows traditional heat pump type air conditioner, it comprises: be used for the power circuit 10 to control circuit and load device power supply, be used to detect the temperature sensor 20 of room temperature, the interior conduit temperature sensor 30 that is used for heat exchanger temperature in the sensing chamber, be used to receive the signal of remote controller emission and this signal be converted to the receiver 40 of the signal of telecommunication and be used to control the microprocessor 50 of all parts of air-conditioner.
Above-mentioned air-conditioner further comprises: be arranged on the indoor fan motor 60 in the indoor unit, be arranged on the outdoor fan motor 70 in the outdoor unit, the compressor 80 that is used for the forced circulation cooling agent, the drive circuit 100 that is used to change the cross valve 90 of cold-producing medium loop direction and change heating or refrigeration work pattern and is used under microprocessor control, driving described load device.
Described air-conditioner also comprises: the yard piping temperature sensor 110 of temperature that is used to detect the outdoor heat converter of heating work pattern, carry out to cut off cross valve and heating mode is converted to the defrosting circuit 120 of refrigerating mode so that the frost that forms the decontamination chamber outer heat-exchanger pipeline and be used to observe the cross valve monitoring circuit 130 that cross valve switches on or off state when the starting point from heating mode finished to the scheduled time.
In above-mentioned air-conditioner, when the heating work pattern was selected by remote controller or other input unit, cross valve 90, indoor fan motor 60, outdoor fan motor 70 and compressor 80 just were activated, so that carry out heating operation.
When connecting cross valve 90 on the heating mode that air-conditioner is being set, power supply just adds to the defrosting circuit 120 that is arranged in the outdoor unit.After the scheduled time (for example 60 ± 10 minutes) finishes, the pipe temperature of yard piping temperature sensor 110 measuring chamber outer heat-exchangers.At this moment, if pipe temperature is lower than-6 ℃, microprocessor 50 just determines to have formed frost and force disconnect cross valve in outdoor heat converter.Then, microprocessor 50 is distinguished the cut-out of cross valve by cross valve monitor circuit 130, and connects indoor fan motor 60 and outdoor fan motor 70 so that carry out defrost operation.
When the pipe temperature of outdoor heat converter surpasses 12 ℃ after cool cycles begins, or when the duration of defrost operation surpassed 12 minutes, cross valve 90 was connected by defrosting circuit 120, and defrost operation is stopped.Meanwhile, microprocessor 50 drives load device so that carry out heating operation again.
Therefore, defrosting time finishes to determine automatically by sensing chamber's Outer Tube temperature or by detecting the scheduled time.
Yet, in above-mentioned Defrost method, when compressor 80 and outdoor fan motor 70 are turned off during heating work, the temperature of outdoor heat converter can reduce rapidly, so, microprocessor 50 will reduce fast temperature regards the frosting situation as, and in fact frosting does not form in outdoor heat converter.
In addition, when outdoor temperature dropped to below 0 ℃, the temperature that outdoor heat converter perhaps can occur was lower than-6 ℃ situation.But although the temperature of described interchanger becomes-6 ℃, frost does not form in described interchanger.Therefore, in this case, the efficient step-down of heating operation.In addition, according to said method, it is necessary that yard piping temperature sensor, defrosting circuit and cross valve monitoring circuit are set, so manufacturing cost is very high.
In order to address the above problem, among the open communique 1991-260541 of Japan Patent a kind of Defrost method that is used for coming according to the velocity variations of indoor fan calibration chamber outer heat-exchanger temperature is disclosed.Yet this method is not considered the continuous opening time of compressor, so just can not change by the fast temperature of response yard piping when compressor opens or cuts out, thereby can not accurately detect frosting.In addition, do not consider that owing to the temperature of this method calibration chamber Outer Tube room temperature changes, thereby some frost detection mistake may occur.
That is to say that the temperature sensor that is used for detecting indoor temperature is arranged on indoor heat converter so that the temperature in the indoor heat converter has the effect of the inlet temperature in the temperature sensor.Therefore, if the air capacity of indoor fan reduces because of air capacity changes, some frost then can occur and detect mistake.
Disclose another kind of Defrost method among the open communique 1994-272931 of Japan Patent, this method is the selection defrost operation when being lower than temperature gap between predetermined value or indoor heat converter temperature and room temperature and being lower than 30 ℃ of the temperature when indoor heat converter.Yet this method is not considered the continuous opening time of compressor, and like this, it responds the fast temperature variation of yard piping in the time of just can not or closing at compressor start, thereby can not accurately detect frosting.Although defrost operation descends by the indoor heat converter temperature and begins to carry out, this method does not consider that the rotary speed of indoor fan changes, and does not promptly consider to cause the air capacity of indoor heat converter variations in temperature.Thereby some mistake that frost detects can appear.
The purpose of this invention is to provide have can sensing chamber's outer heat-exchanger in frosting, and in the heating mode operation, start the Defrost method of defrost operation by interior conduit sensor and temperature sensor.
Purpose of the present invention realizes that according to the preferred embodiment of the Defrost method that is provided this method may further comprise the steps:
The first temperature gap TD1 between measuring chamber interior conduit temperature T E1 and the room temperature TR1, wherein, described interior conduit temperature and described room temperature TR1 measure during through scheduled time m1 minute after heating operation begins;
The second temperature gap TD2 between measuring chamber interior conduit temperature T E2 and the room temperature TR2, wherein, described interior conduit temperature T E2 and room temperature TR2 measure during through scheduled time m2 minute after heating operation begins;
With reference value and each temperature gap TD1, TD2 relatively, so that determine whether frost forms in outdoor heat converter, if in described heat exchanger, formed frost then carry out defrost operation.
One of feature of the present invention be after compressor is opened during through the scheduled time in first and second temperature survey step measuring chamber interior conduit temperature and the room temperatures; If the air capacity of indoor fan changes after the first temperature survey step, interior conduit temperature after then the first measuring chamber interior conduit temperature T E1 changes at once according to air capacity and air capacity are calibrated through the temperature gap between the interior conduit temperature of the scheduled time after changing.If the air capacity of indoor fan changes after the second temperature survey step, calibrate through the temperature gap between the interior conduit temperature of the scheduled time after interior conduit temperature after then temperature T E1, TE2 change at once according to air capacity and the variations in flow.
Two of feature of the present invention is to surpass predetermined value and carry out heating operation during greater than the first measuring chamber interior conduit temperature T E1 as the second measuring chamber interior conduit temperature T E2, and defrosting time is based on the temperature gap between the temperature gap TD2 of the temperature gap TD1 that measures in the first temperature survey step and the measurement of the second temperature survey step.And the temperature gap Tx of defrost operation between the first measuring chamber interior conduit temperature T E1 and the second measuring chamber interior conduit temperature T E2 begins when becoming greater than predetermined value.
Fig. 1 is the block diagram of the control circuit of traditional air-conditioner;
Fig. 2 is the block diagram of the preferred control circuit of air-conditioner of the present invention;
Fig. 3 a to Fig. 3 c is the flow chart that is used to illustrate Defrost method of the present invention;
Fig. 3 a is the flow chart that is used to illustrate for the thermometry that detects frosting;
Fig. 3 b is the flow chart that is used to illustrate the method that detects frosting and definite defrosting time;
Fig. 3 c and Fig. 3 d are used to illustrate according to air capacity during the detected temperatures change the flow chart that comes the calibration measurement method of temperature;
Fig. 4 is the curve map of variations in temperature in interior conduit and the room;
Fig. 5 be according to through after the scheduled time with the curve map of variations in temperature in the variation interior conduit of air capacity and the room.
Describe embodiment with reference to the accompanying drawings in detail.
Fig. 2 shows the block diagram according to electrical connection between air-conditioner each several part of the present invention.In Fig. 2, saved the yard piping temperature sensor 110 of traditional air-conditioner, defrosting circuit 120 and cross valve monitoring circuit 130, but the function of each several part is identical with traditional function.
With reference to Fig. 3 white detection method and its control are described below.If heating operation begins, then the heating operation time is by microprocessor 50 timing and heating continuously under normal condition; Interior conduit temperature and room temperature will rise gradually, as shown in Figure 4.After this, if formed frost, then described pipe temperature will reduce gradually.
In the present invention, whether microprocessor is formed by using interior conduit temperature sensor and room temperature sensor decision frost.Shown in Fig. 3 a, step S1 determines whether defrost operation is performed during heating operation.If defrost operation is carrying out or heating operation begins back not end in scheduled time m1 minute, then flow process is transformed into step S2.
After this, execution in step S2, S3 are to start k1 minute work continuously through m1 minute and compressor after guaranteeing heating operation and beginning.Do not carry out after if heating operation begins m1 minute or compressor start after do not pass through k1 minute, then interior conduit temperature instability, so that interior conduit temperature can not be measured in the given time.The compressor start time is represented the continuous start-up time of compressor.So if compressor starts starts, the compressor start time is just accumulated until compressor shutdown.If stop the start-up time of compressor, described start-up time is with regard to zero clearing.
After this, if compressor starts continuously greater than k1 minute, described pipe temperature just begins to stablize, and the interior conduit temperature T R1 and the room temperature TE1 that pass through so after m1 minute are just measured.At step S4, the temperature gap between described temperature T E1, TR1 just calculates, and its result is deposited in memory.That is, if after the no show start-up time heating operation of described compressor begins k1 minute, flow process just forwards step S3 to.If reach k1 minute described start-up time, the measurement of temperature T E1, TE4 is just finished at step S4.
Whether step S5, S6 determine to pass through m2 minute after heating operation begins and whether compressor starts more than k1 minute continuously.After first temperature survey was carried out, if circulate coolant stops owing to the shutdown of compressor, then pipe temperature began instability, and temperature survey just can not be carried out like this.
If the answer of step S5, S6 is for being (yes), then determine at step S7 whether the air capacity of indoor fan variation has taken place.At this moment, if the air capacity of described fan changes, then flow process jumps to the step shown in Fig. 3 d, and this is because perhaps variations in temperature occurs in the interior conduit temperature.If described fan air amount does not change, then measure heating operation and open interior conduit temperature T E2 and the room temperature TR2 of beginning process after m2 minute.At this moment, if after not reaching described compressor the continuous start-up time of described compressor and opening the moving time k1 minute, then logic turns back to step S5.When reach k1 minute described start-up time, carry out the measurement of temperature T E2, TR2 at step S8.In step S8, go back the temperature gap TD2 between accounting temperature TE2, the TR2, and its result is existed on the memory.
After this, each is temperature value measured TE1, TE2, TR1, TR2 in the first and second temperature survey steps, and temperature gap TD1, TD2 and reference value compare, so that determine whether frost forms in outdoor heat converter, and definite defrosting time.
Definite method of the defrosting time when forming according to the white detection method of temperature value measured and frost below with reference to Fig. 3 b explanation.
In step S9,, determine that then frost does not form in outdoor heat converter if be higher than the interior conduit temperature T E1 of process after m1 minute through the interior conduit temperature T E2 after m2 minute.In step S10, if be higher than uniform temperature T1 ℃ through the temperature T E2 after m2 minute, then can not frosting in described heat exchanger.Like this, flow process just jumps to the step S18 that carries out the normal heating operation.
On the other hand, if be lower than 1 ℃ of certain temperature T from the interior conduit temperature of process start-up time after m2 minute of heating operation, then defrosting time changes according to the Td value.Here, the Td value is defined by following formula.
Td=(TE1-TR1)-(TE2-TR2) promptly, the Td value is calculated by C.T difference TD1 and TD2, and the Td value is the coefficient that is used for determining defrosting time.
In step S11, if the Td value is higher than 2 ℃ of certain temperature T, then defrosting time was set to P1 minute.If the Td value is lower than uniform temperature T2 ℃, then check at step S12 whether the Td value is higher than uniform temperature T3 ℃.If the Td value is higher than T3 ℃, then defrosting time is set to P2 minute.
If temperature gap Td does not become predetermined value such among step S11, the S12, especially be in window and during heating operation, open the situation that flows into the room with cold air, interior conduit temperature and room temperature almost begin to descend with identical lapse rate.At this moment, the temperature gap of process after m1 minute is almost identical with the temperature gap of process after m2 minute.Therefore, the interior conduit temperature begins to descend, and frost forms in outdoor heat converter and becomes possibility fully.Like this, defrost operation is had to by using the temperature gap Tx that just in time is between interior conduit temperature T E1, TE2 to carry out.Here, temperature gap Tx is determined by following formula.
Tx=TE1-TE2 promptly, the Tx value refers to through the temperature gap between the interior conduit temperature after m1 minute and the interior conduit temperature of passing through after m2 minute.In step S13, if the Tx value is higher than uniform temperature T4 ℃, then defrosting time is set to P3 minute.In step S14, if the Tx value is not higher than T4 ℃ and be not less than T5 ℃, then defrosting time was set to P4 minute.In step S11 to S14, if the defrosting condition is insufficient, defrosting time in step S15 with regard to zero clearing, defrost operation finishes subsequently.
When defrosting time was provided with as mentioned above, cross valve, indoor fan and outdoor fan were closed with execution kind of refrigeration cycle (step S17) and defrosting sign indicating number and are established with the indication defrost operation, but compressor keeps its starting state during kind of refrigeration cycle.If defrost operation is finished, cross valve, indoor fan and outdoor fan are connected to carry out normal heating and are operated, and the defrosting code weight is put with indication heating operation (step S18).
On the other hand, if heating operation did not pass through m2 minute after starting constantly in step S5, then flow process jumps to the logic shown in Fig. 3 C.In steps A 1, will determine that whether pipe temperature changes according to the air capacity through the indoor fan after m1 minute.That is to say steps A 1 determines whether to exist the air capacity of indoor fan to change after compressor start is constantly through K1 minute.Flow process does not jump to step S6 if air capacity changes.If air capacity changes, then whether passed through K2 minute (steps A 3) at that moment measuring chamber interior conduit temperature T E3 (steps A 2) with after checking the air capacity variation.If passed through k2 minute, measuring chamber interior conduit temperature T E4 (steps A 4) then.Subsequently, the E3 of temperature T at once after air capacity changes and through the temperature T E4 that measures after k3 minute in steps A 5 mutually relatively and by using this comparative result to be aligned in the interior conduit temperature of measuring in the first temperature survey step.
In other words, when air capacity changes, the such variation shown in interior conduit temperature and the room temperature image pattern 5.If air capacity variation and the interior conduit temperature T E4 of process after k2 minute are higher than the temperature T of the interior conduit at once E3 after air capacity changes, then the difference α between temperature value TE3, the TE4 and first measures temperature T E1 addition so that according to the variations in temperature (steps A 6) in the air variable quantity calibration chamber interior conduit.If described temperature T E4 is lower than described temperature T E3, then measures the temperature T E1 and deduct the difference α between temperature value TE3, TE4 so that calibrate described temperature T E1 (steps A 7) from first.Air capacity is in case generation changes continuously, and described temperature T E1 just will be calibrated once more.
On the other hand, in step S7, should check from heating operation and open the beginning constantly through whether existing after m2 minute air capacity to change variations in temperature the interior conduit that causes.If answer to being that flow process jumps to the logic shown in Fig. 3 d so.That is, change, then measure that interior conduit temperature T E5 (step B1) constantly if air capacity takes place.After this, in step B2, check after air capacity changes whether passed through k2 minute.If through k2 minute, then in step B3, measure the interior conduit temperature T E6 of process after k2 minute after air capacity changes.Subsequently, E5 of temperature T at once after described air capacity changes and the described temperature T E6 of process after k2 minute compare mutually, and by using this comparative result to be aligned in the interior conduit temperature of measuring in the second temperature survey step.
In other words, when air capacity changed, interior conduit temperature and room temperature changed as shown in Figure 6.If air capacity changes and described temperature T E6 is higher than described temperature T E5, the difference β between then described temperature T E5, TE6 is added to second and measures temperature T E2 so that according to the variations in temperature (step B5) in the air capacity variation calibration chamber interior conduit.And temperature gap β is added to the first measurement temperature T E1 so that the variations in temperature in the calibration chamber interior conduit.
If air capacity changes and described temperature T E6 is lower than described temperature T E5, then measure the temperature T E2 and deduct temperature gap β so that calibrate described temperature T E2 from second.With measure temperature T E1 from first and deduct temperature gap β so that calibrate described temperature T E1.In case air capacity changes continuously, described temperature T E1, TE2 just should be calibrated once more.If the calibration to interior conduit temperature T E1, TE2 is done as the above, then temperature gap TD1, TD2 must recomputate once more.
According to said method, the temperature gap between temperature gap TD1, TD2 is just obtained.After obtaining this temperature gap, carry out the logic step shown in Fig. 3 b.Like this, if this temperature gap is higher than certain value, then carry out defrost operation.If this temperature gap is lower than certain value, then carry out the normal heating operation.
According to above-mentioned the present invention, can obtain following advantage, effect. To describe basis in detail below Effect of the present invention.
In traditional air-conditioner, if compressor is closed after cross valve is connected through 60 minutes, Temperature in the outdoor heat converter is with regard to rapid decrease, and microprocessor can descend this fast temperature and regard knot as The frost situation, so that just carry out defrost operation without the accurate detection of frosting. Yet in the present invention, because All temperature are measured after the compressor Startup time was through k1 minute, thereby the frosting detection is accurate Ground. So improved the efficient of heating operation.
When outdoor temperature is below 0 ℃ and absolute humidity when very low, frost can be at outdoor heat converter Middle formation. But in traditional air-conditioner, although in outdoor heat converter, do not form frost, can root Carry out defrost operation according to environment temperature. Thereby the Efficiency Decreasing of heating operation. Yet in the present invention, If the temperature in the outdoor heat converter descends because of frosting in the outdoor heat converter, frosting can be by making Accurately detected with this drop in temperature. Therefore, defrost operation is only frost shape in outdoor heat converter Cheng Shicai carries out, so improved the efficient of heating operation.
In the present invention, do not need to provide defrosting circuit, yard piping temperature sensor and four for air-conditioner Therefore logical valve monitoring circuit has reduced manufacturing cost.
In traditional air-conditioner, when compressor connects or cuts out, go to respond in the interior conduit fast Variations in temperature is very difficult. Yet in the present invention, the fast temperature in the interior conduit changes logical Cross to measure from the compressor Startup time and assert through the interior conduit temperature after the scheduled time, so can Accurately detect frosting.
In addition, in traditional air-conditioner, the interior conduit temperature is only based on the air variable quantity of indoor fan Calibrate, and do not consider to change because air capacity changes the room temperature that causes. Yet, in the present invention, After changing calibration chamber interior conduit temperature based on air capacity, also based between interior conduit temperature and room temperature Temperature gap calculates the at once room temperature after air capacity changes. Thereby, can accurately detect frosting.
Claims (7)
1, a kind of Defrost method of heat pump type air conditioner may further comprise the steps:
The first temperature gap TD1 between measuring chamber interior conduit temperature T E1 and the room temperature TR1, wherein said interior conduit temperature T E1 and described room temperature TR1 measure during through scheduled time m1 minute after heating operation opens the beginning;
The second temperature gap TD2 between measuring chamber interior conduit temperature T E2 and the room temperature TR2, wherein, described interior conduit temperature T E2 and described room temperature TR2 measure during through scheduled time m2 minute after heating operation opens the beginning;
Each temperature gap TD1, TD2 and reference value comparison so that determine whether in outdoor heat converter, to have formed frost, as bloom as described in form in the heat exchanger and then carry out defrost operation;
When behind the compressor start during through the scheduled time described temperature T E1, TR1, TE2, TR2 in the first and second temperature survey steps, measure;
Temperature gap TD1 that defrosting time is measured by the first temperature survey step and temperature gap Td between the temperature gap TD2 of second temperature survey step measurement determine.
2, Defrost method according to claim 1, when the air capacity of indoor fan changes after the first temperature survey step, after changing according to air capacity, the first measuring chamber interior conduit temperature T E1 and temperature gap TD1 calibrate through temperature gap between the indoor temperature of the scheduled time after at once interior conduit temperature and the air capacity variation.
3, Defrost method according to claim 1, when the air capacity of indoor fan changes after the second temperature survey step, after changing according to air capacity, the first and second measuring chamber interior conduit temperature T E1, TE2 and temperature gap TD1, TD2 calibrate through temperature gap between the indoor temperature of the scheduled time after at once interior conduit temperature and the air capacity variation.
4, Defrost method according to claim 1 wherein, is carried out heating operation when the second measuring chamber interior conduit temperature T E2 surpasses predetermined value and is higher than the first measuring chamber interior conduit temperature T E1.
5, Defrost method according to claim 1 wherein, detects frosting when the temperature gap Tx between described temperature T E1 and the described temperature T E2 becomes greater than predetermined value.
6, Defrost method according to claim 1, wherein, defrosting time is determined according to the described difference Tx between described temperature T E1 and the described temperature T E2.
7, Defrost method according to claim 1, wherein, if the Td value is higher than uniform temperature T2 ℃, defrosting time is set at P1 minute, if the Td value, checks whether the Td value is higher than uniform temperature T3 ℃ less than uniform temperature T2 ℃, if the Td value is higher than T3 ℃, defrosting time is set at P2 minute.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960001939A KR0157021B1 (en) | 1996-01-29 | 1996-01-29 | Defrosting method of an airconditioner |
| KR1939/96 | 1996-01-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164006A CN1164006A (en) | 1997-11-05 |
| CN1091238C true CN1091238C (en) | 2002-09-18 |
Family
ID=19450278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97103196A Expired - Fee Related CN1091238C (en) | 1996-01-29 | 1997-01-29 | Defrosting method for heat pump type air conditioner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH09210516A (en) |
| KR (1) | KR0157021B1 (en) |
| CN (1) | CN1091238C (en) |
| IT (1) | IT1304956B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849143A (en) * | 2007-11-05 | 2010-09-29 | 大金工业株式会社 | Air conditioning control device, air conditioning device, and air conditioning control method |
| CN103868296A (en) * | 2014-04-01 | 2014-06-18 | 深圳麦克维尔空调有限公司 | Method for defrosting air conditioning unit and air conditioning unit |
| CN104896819A (en) * | 2015-05-06 | 2015-09-09 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting method and heat pump system |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5727395A (en) * | 1997-02-14 | 1998-03-17 | Carrier Corporation | Defrost control for heat pump |
| KR100484968B1 (en) * | 2002-07-31 | 2005-04-25 | 위니아만도 주식회사 | Method for defrosting operation of air-conditioner used both cooler and heater |
| JP2008170064A (en) * | 2007-01-11 | 2008-07-24 | Daikin Ind Ltd | Air conditioner |
| KR100957178B1 (en) * | 2008-01-25 | 2010-05-11 | 위니아만도 주식회사 | Method of controlling defrosting of air conditioner |
| CN102230660A (en) * | 2011-06-03 | 2011-11-02 | 龚光彩 | Adaptive anti-defrosting control method for heat pump device |
| CN102853502B (en) * | 2012-09-29 | 2014-12-31 | 广东美的制冷设备有限公司 | Defrosting control method of heat pump air conditioner unit |
| CN104764171B (en) * | 2015-04-27 | 2017-10-27 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
| CN113587530B (en) * | 2021-08-12 | 2023-04-14 | 澳蓝（福建）实业有限公司 | Defrosting method for indirect evaporation heat exchange core body of data center |
| CN114216215B (en) * | 2021-11-19 | 2023-04-25 | 珠海格力电器股份有限公司 | Antifreezing control method and device for water system and related equipment |
-
1996
- 1996-01-29 KR KR1019960001939A patent/KR0157021B1/en not_active IP Right Cessation
-
1997
- 1997-01-29 JP JP9015764A patent/JPH09210516A/en active Pending
- 1997-01-29 IT IT1997MI000162A patent/IT1304956B1/en active
- 1997-01-29 CN CN97103196A patent/CN1091238C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849143A (en) * | 2007-11-05 | 2010-09-29 | 大金工业株式会社 | Air conditioning control device, air conditioning device, and air conditioning control method |
| CN103868296A (en) * | 2014-04-01 | 2014-06-18 | 深圳麦克维尔空调有限公司 | Method for defrosting air conditioning unit and air conditioning unit |
| CN104896819A (en) * | 2015-05-06 | 2015-09-09 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting method and heat pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1304956B1 (en) | 2001-04-05 |
| CN1164006A (en) | 1997-11-05 |
| JPH09210516A (en) | 1997-08-12 |
| ITMI970162A1 (en) | 1998-07-29 |
| KR0157021B1 (en) | 1999-01-15 |
| KR970059629A (en) | 1997-08-12 |
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