CN102331068A - Defrosting method of air conditioner - Google Patents
Defrosting method of air conditioner Download PDFInfo
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- CN102331068A CN102331068A CN201110145134A CN201110145134A CN102331068A CN 102331068 A CN102331068 A CN 102331068A CN 201110145134 A CN201110145134 A CN 201110145134A CN 201110145134 A CN201110145134 A CN 201110145134A CN 102331068 A CN102331068 A CN 102331068A
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Abstract
The invention provides a defrosting method of an air conditioner. The defrosting method is characterized in that an inner fan is ceased for heat exchange, a compressor exhaust pipe generates a high temperature and high pressure gas, a four-way valve is opened when a heating mode is in operation, and the coil pipe of an indoor machine is mutually connected with the high temperature and high pressure exhaust pipe; the coil temperature Tm of an testing room is used for judging the pressure of the high temperature and high pressure gas, when the high temperature and high pressure gas reaches the allowable highest protecting temperature Tm of the system, and a four-way change valve is closed; as the four-way valve is opened when the heating mode is in operation, an outdoor coil pipe and the air suction pipe of the compressor are connected under a lower pressure, when the four-way valve is closed, the exhaust pipe is connected with the outdoor coil pipe, the high temperature and high pressure gas generated by the exhaust pipe can flow back to an air return pipe directly through the outdoor coil pipe while the four-way valve is closed; meantime the high temperature and high pressure gas can melt the frost outside a hot melting coil pipe by releasing a great deal of heat during reflowing and sucking air via the frosting coil pipe of the outdoor coil pipe, the un-melt frost can be completely removed from the compressor after a while, and the defrosting efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of Defrost method of air-conditioner.
Background technology
Air-conditioner heats when running in the winter time, and when outdoor temperature is lower, when humidity was big, the frosting phenomenon can appear in condenser, influences the heat exchange effect of heat exchanger of air conditioner outdoor unit.When air-conditioner adopts refrigeration modes to melt the frosting on the outdoor heat exchanger; Air-conditioning no longer heats running, and opposite air conditioner room unit heat exchanger also can cause indoor temperature to reduce from the indoor part heat that siphons away; Reduce the heating effect of air-conditioner, reduce the comfortableness of air-conditioning.
The common defrosting control method that adopts of air-conditioner has two kinds at present.First kind is that compressor of air conditioner shuts down, and cross valve commutates to the refrigerating operaton state, stops indoor fan and outdoor fan, and compressor of air conditioner starts then, gets into the defrosting running.After defrosting finished, compressor shut down, and outdoor fan is forced high wind running a period of time, and cross valve switches to the heating operation state, compressor start, and outdoor fan, indoor interior machine turn round according to control mode separately.This mode defrosting time is long, and fluctuations in indoor temperature is big.Second method is to be applicable to transducer air conditioning; The control method of telling about like the patent No. 200610145467.0 is on the basis of first method; For shortening the air-conditioner defrosting time, in the defrost process, the control magnetic valve unloads; Compressor mixes down to lower frequency, controls cross valve then and freezes, heats the operating condition switching.Generally between 6～12 minutes, defrosting time is longer relatively, causes fluctuations in indoor temperature bigger for the defrosting time of these two kinds of methods reality, and heating effect is poor, and air conditioning energy consumption is big in the defrost process simultaneously.
Along with improving constantly of air-conditioning efficiency grade, how to shorten the air-conditioner defrosting time, improve air-conditioning heating capacity and air-conditioning efficiency and become important problem of present air conditioner industry.
Summary of the invention
The invention provides a kind of Defrost method of air-conditioner, be used to shorten the air-conditioner defrosting cycle, reduce energy consumption in the defrost process, improve air-conditioning heating capacity and efficiency grade.
Be the technical solution problem, the present invention provides a kind of Defrost method of air-conditioner, and it may further comprise the steps:
A, air-conditioner outdoor unit controller adopt temperature sensor external environment temperature T a of sensing chamber and temperature sensor to detect defrosting temperature T e, according to detected temperature value, according to judging whether air-conditioning gets into the defrosting running;
After B, air-conditioning got into the defrosting running, outdoor controller was sent out the defrosting instruction to indoor set;
After C, indoor set controller are received the defrosting instruction; The control room inner blower shuts down; And through the inner coil pipe temperature T m of indoor coil pipe sensor sensing chamber; When coil temperature reached indoor set and heats the temperature value Tm of antioverloading protection, compressor and outdoor fan shut down immediately, and the while cross valve switches to the cooling operation state.Compressor shutdown T1 restarts running after second, gets into the defrosting operation process;
D, air-conditioner outdoor unit controller judge according to defrosting temperature T e whether defrosting finishes.After defrosting finished, outdoor controller control compressor stopped immediately, and outdoor fan runs up T2 second, cross valve is switched to heat operating condition then, and the defrosting operation process finishes.
Adopt after the said structure, compared with prior art the present invention has following remarkable advantage and beneficial effect:
Main technical scheme of the present invention is through stopping the inner blower heat exchange; Make compressor exhaust pipe produce the gas of HTHP, cross valve is opened during the heating mode operation, and the coil pipe of indoor set links to each other with the blast pipe of HTHP; Judge the pressure of high temperature and high pressure gas through the inner coil pipe temperature T m of sensing chamber; When the highest protection temperature T m that high temperature and high pressure gas reaches that system allows, close four-way change-over valve, because (cross valve is opened) outdoor coil pipe used link to each other with the air intake duct of press (pressure is lower) during heating operation; When cross valve is closed; Because blast pipe links to each other with outdoor coil pipe used, this high temperature and high pressure gas that just makes blast pipe produce can be directly through the outdoor coil pipe used muffler that flows back to when cross valve is closed, and the gas of HTHP flowed back to through outdoor coil pipe used (frosting coil pipe) and can emit the frost outside a large amount of heat thawing coil pipes when air-breathing this moment; Remove at compressor after after a while that not change most frost just very fast, played the efficient that has improved defrost greatly like this.
The specific embodiment
Specifically, the present invention provides a kind of air-conditioner Defrost method, the air-conditioning duct composition that said air-conditioner comprises frequency-changeable compressor, condenser, evaporimeter, cross valve and is connected with upper-part.This method may further comprise the steps:
A, air-conditioner outdoor unit controller adopt temperature sensor external environment temperature T a of sensing chamber and temperature sensor to detect defrosting temperature T e, according to detected temperature value, according to judging whether air-conditioning gets into the defrosting running; Concrete defrosting entry condition is following:
Heating compressor accumulated running time reached more than 45 minutes, and after the compressor continuous operating time reaches 20 minutes, Ta-Te >=10 ℃ or Te＜-3 ℃;
After B, air-conditioning got into the defrosting running, outdoor controller was sent out the defrosting instruction to indoor set;
After C, indoor set controller are received the defrosting instruction; The control room inner blower shuts down; And through the inner coil pipe temperature T m of indoor coil pipe sensor sensing chamber; When coil temperature reached indoor set and heats 65 ℃ of the temperature values of antioverloading protection, compressor and outdoor fan shut down immediately, and the while cross valve switches to the cooling operation state.After the compressor shutdown 30 seconds, restart running, get into the defrosting operation process;
D, air-conditioner outdoor unit controller judge according to outdoor coil pipe used temperature T e whether defrosting finishes.If outdoor coil pipe used temperature T e＞10 ℃, the duration, after defrosting finished, outdoor controller control compressor stopped immediately greater than 10 seconds, and outdoor fan ran up for 10 seconds, cross valve is switched to heat operating condition then, and the defrosting operation process finishes.
The cross valve switching-over adds a muffler at the airflow noise that air-conditioning duct produces respectively in off-premises station tracheae, liquid pipe stop valve and off-premises station internal duct junction in the defrost process in order to reduce.
After adopting control method of the present invention, the off-premises station defrosting time can shorten to 2～5 minutes, and fluctuations in indoor temperature is little during defrosting, and compares with background technology, and the present invention defrosts and can reduce the air-conditioning power consumption more than 30% in the operation process.
Claims (1)
1. the Defrost method of an air-conditioner, it is characterized in that: it may further comprise the steps:
A, air-conditioner outdoor unit controller adopt temperature sensor external environment temperature T a of sensing chamber and temperature sensor to detect defrosting temperature T e, according to detected temperature value, according to judging whether air-conditioning gets into the defrosting running;
After B, air-conditioning got into the defrosting running, outdoor controller was sent out the defrosting instruction to indoor set;
After C, indoor set controller are received the defrosting instruction; The control room inner blower shuts down; And through the inner coil pipe temperature T m of indoor coil pipe sensor sensing chamber; When coil temperature reached indoor set and heats the temperature value Tm of antioverloading protection, compressor and outdoor fan shut down immediately, and the while cross valve switches to the cooling operation state.Compressor shutdown T1 restarts running after second, gets into the defrosting operation process;
D, air-conditioner outdoor unit controller judge according to defrosting temperature T e whether defrosting finishes; After defrosting finished, outdoor controller control compressor stopped immediately, and outdoor fan runs up T2 second, cross valve is switched to heat operating condition then, and the defrosting operation process finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145134.9A CN102331068B (en) | 2011-05-24 | 2011-05-24 | Defrosting method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145134.9A CN102331068B (en) | 2011-05-24 | 2011-05-24 | Defrosting method of air conditioner |
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| Publication Number | Publication Date |
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| CN102331068A true CN102331068A (en) | 2012-01-25 |
| CN102331068B CN102331068B (en) | 2014-04-02 |
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| CN201110145134.9A Active CN102331068B (en) | 2011-05-24 | 2011-05-24 | Defrosting method of air conditioner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901182A (en) * | 2012-10-16 | 2013-01-30 | 青岛海尔空调电子有限公司 | Defrosting method and system for air conditioner |
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN103162384A (en) * | 2013-03-04 | 2013-06-19 | 约克（无锡）空调冷冻设备有限公司 | Draught fan control method of heat pump operation |
| CN105258270A (en) * | 2015-09-28 | 2016-01-20 | 深圳麦克维尔空调有限公司 | Constant-frequency fresh air system and defrosting control method thereof |
| CN105972771A (en) * | 2016-05-30 | 2016-09-28 | 广东美的制冷设备有限公司 | Defrosting control method and device for air conditioner |
| CN107166688A (en) * | 2017-07-10 | 2017-09-15 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN108105942A (en) * | 2017-12-26 | 2018-06-01 | 广东唯金智能环境科技有限公司 | Air conditioner and its Defrost method |
| CN113091216A (en) * | 2021-04-14 | 2021-07-09 | 海信（广东）空调有限公司 | Defrosting control method for air conditioner |
| CN113819578A (en) * | 2021-10-25 | 2021-12-21 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
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| US5257506A (en) * | 1991-03-22 | 1993-11-02 | Carrier Corporation | Defrost control |
| US5440890A (en) * | 1993-12-10 | 1995-08-15 | Copeland Corporation | Blocked fan detection system for heat pump |
| CN1185567A (en) * | 1996-12-20 | 1998-06-24 | 三星电子株式会社 | Defrosting operation regulating device for air conditioner and method thereof |
| CN1204029A (en) * | 1997-06-27 | 1999-01-06 | 三星电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
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- 2011-05-24 CN CN201110145134.9A patent/CN102331068B/en active Active
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| US5257506A (en) * | 1991-03-22 | 1993-11-02 | Carrier Corporation | Defrost control |
| US5440890A (en) * | 1993-12-10 | 1995-08-15 | Copeland Corporation | Blocked fan detection system for heat pump |
| CN1185567A (en) * | 1996-12-20 | 1998-06-24 | 三星电子株式会社 | Defrosting operation regulating device for air conditioner and method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901182A (en) * | 2012-10-16 | 2013-01-30 | 青岛海尔空调电子有限公司 | Defrosting method and system for air conditioner |
| CN102901182B (en) * | 2012-10-16 | 2015-06-03 | 青岛海尔空调电子有限公司 | Defrosting method for air conditioner |
| CN102997368A (en) * | 2012-12-10 | 2013-03-27 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN102997368B (en) * | 2012-12-10 | 2015-04-08 | 宁波奥克斯电气有限公司 | Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors |
| CN103162384A (en) * | 2013-03-04 | 2013-06-19 | 约克（无锡）空调冷冻设备有限公司 | Draught fan control method of heat pump operation |
| CN103162384B (en) * | 2013-03-04 | 2016-01-13 | 约克（无锡）空调冷冻设备有限公司 | The blower control method of operation of heat pump |
| CN105258270A (en) * | 2015-09-28 | 2016-01-20 | 深圳麦克维尔空调有限公司 | Constant-frequency fresh air system and defrosting control method thereof |
| CN105258270B (en) * | 2015-09-28 | 2018-12-11 | 深圳麦克维尔空调有限公司 | It is a kind of to determine frequency fresh air system and its defrosting control method |
| CN105972771A (en) * | 2016-05-30 | 2016-09-28 | 广东美的制冷设备有限公司 | Defrosting control method and device for air conditioner |
| CN107166688A (en) * | 2017-07-10 | 2017-09-15 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN108105942A (en) * | 2017-12-26 | 2018-06-01 | 广东唯金智能环境科技有限公司 | Air conditioner and its Defrost method |
| CN113091216A (en) * | 2021-04-14 | 2021-07-09 | 海信（广东）空调有限公司 | Defrosting control method for air conditioner |
| CN113819578A (en) * | 2021-10-25 | 2021-12-21 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
| CN113819578B (en) * | 2021-10-25 | 2022-10-28 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
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| CN102331068B (en) | 2014-04-02 |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20191216 Address after: 243100 No. 1166, oaks Avenue, Dangtu Economic Development Zone, Ma'anshan City, Anhui Province Patentee after: Anhui Ox Intelligent Electric Co., Ltd. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: NINGBO AUX ELECTRIC CO., LTD. |
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