CN101109592B - Temperature emergent state controlling means for air conditioner compressor air suction port - Google Patents
Temperature emergent state controlling means for air conditioner compressor air suction port Download PDFInfo
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- CN101109592B CN101109592B CN2006100148269A CN200610014826A CN101109592B CN 101109592 B CN101109592 B CN 101109592B CN 2006100148269 A CN2006100148269 A CN 2006100148269A CN 200610014826 A CN200610014826 A CN 200610014826A CN 101109592 B CN101109592 B CN 101109592B
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Abstract
The invention relates to a method for controlling the emergency state of temperature at an air-admission port of a compressor of an air conditioner, which comprises: when an electronic expansion valve starts timed control, first the temperature at the air-admission port of the compressor is sensed, the relationship between the temperature at the air-admission port of the compressor and the set temperature of 2 centigrade; when the temperature at the air-admission port of the compressor is less than 2 centigrade, a control command is sent to the electronic expansion valve to reduce the opening of the expansion valve at a rate of 6pulse/30s; when the temperature at the air-admission port of the compressor is equal or more than 2 centigrade, the temperature at the outlet of the evaporimeter is sensed, the overhot error at the outlet of the evaporimeter is judged to be too high or not; when the overhot error at the outlet of the evaporimeter is too high, that is, |outlet temperature - (inlet temperature + overhot rate)| is more than 1 centigrade, the opening of the electronic expansion valve is controlled starting by increasing the opening of the electronic expansion valve, so as to guarantee that the refrigeration of the air conditioner runs steadily.
Description
Technical field
The present invention relates to air-conditioner, particularly relate to air-conditioner refrigerating state control method through electronic expansion valve opening control.
Background technology
Air-conditioner is a kind ofly to regulate indoor temperature and make its electrical Household appliance that remains on the required situation of user, mainly comprises cooling cycle system and air circulation system.Cold-producing medium and indoor flow air through circulating in its refrigeration system are carried out heat exchange to realize room temperature lowering or intensification, for people provide fresh, comfortable air ambient.
The cooling cycle system of air-conditioner is made up of evaporimeter, condenser, compressor and expansion device etc., and air circulation system is made up of turnover style grid, air filter, fan and fan electromotor etc.The cooling cycle system of air-conditioner and the operation of air circulation system are controlled by electrical apparatus control system, like the refrigeration of air-conditioner or the setting of heat supply running, dehumidifying operation, air outlet and air inlet Electric Machine Control and fan wind speed control system and room temperature etc.
In summer, the cold-producing medium in the cooling cycle system carries out kind of refrigeration cycle by the order of evaporation → compression → condensation → expansion, realizes the operation of air-conditioner refrigerating state.That is, the high temperature and high pressure gaseous refrigerant that spues from compressor is through reversal valve inlet chamber external condenser, condensation heat release in condenser; The liquid refrigerant of warm high pressure in becoming; Become the liquid refrigerant of low-temp low-pressure through the expansion device decrease temperature and pressure, the evaporator evaporation heat absorption becomes the gaseous refrigerant of low-temp low-pressure in the inlet chamber again, and carries out heat exchange with the evaporimeter ambient air; Then, cold-producing medium returns and proceeds kind of refrigeration cycle again after compressor is compressed into high-temperature high-pressure state.
In the above-mentioned cooling cycle system, the effect of expansion device is the step-down cooling, and liquid refrigerant is reduced to evaporating pressure from condensing pressure, is convenient to evaporation heat absorption in evaporimeter, simultaneously, regulates the refrigerant flow that gets into evaporimeter as required.The expansion device of air-conditioner mainly contains heating power expansion valve, thermal electric expansion valve, electric expansion valve and capillary.
Electric expansion valve is to realize the cold-producing medium unsteady flow amount control in the cooling cycle system with microcomputer, and makes air-conditioner be in the refrigerating system control assembly of optimal operational condition.Microcomputer carries out ratio and integral operation according to given temperature value and room temperature difference, with the aperture of control valve, directly changes the refrigerant flow that gets in the evaporimeter.Thereby in systems such as convertible frequency air-conditioner, fuzzy control air-conditioning and multiloop loop system air-conditioning, electric expansion valve all obtains increasingly extensive application as the trim according to different operating mode control system refrigerant flows.
Fig. 1 is the electric expansion valve timer control routine figure of the one-driven-several type air-conditioner kind of refrigeration cycle of multiloop loop system.As shown in the figure; When electric expansion valve begins timing controlled, by the bulb sensing evaporator outlet temperature that is arranged on the indoor evaporator outlet pipe arrangement, if evaporator outlet degree of superheat deviation is big; Promptly | outlet temperature-(inlet temperature+degree of superheat) | in the time of＞1 ℃; Then change, change the refrigerant flow that gets in the evaporimeter from the aperture that increases expansion valve opening control electric expansion valve, in stable condition to reach the air-conditioner refrigerating operaton.
But in the control method for electronic expansion valve of the air-conditioner kind of refrigeration cycle of above-mentioned prior art, its control object is an evaporator outlet temperature, has promptly only considered the evaporator outlet degree of superheat.Therefore, after evaporator outlet degree of superheat deviation meets the demands, might cause the compressor air suction temperature to cross low and phenomenon appearance that cause air entry to freeze, this exerts an influence for the normal operation and the operating efficiency of compressor.
Summary of the invention
To the existing problem that possibly cause the compressor air suction mouth icing phenomenon to occur of the air-conditioner refrigerating state control method of above-mentioned prior art; The present invention has added in the electric expansion valve timer control routine the temperature controlled program of compressor air suction mouth; So that under the low excessively situation of air entry temperature, the electronic Expansion Valve Control that reduces expansion valve opening of the evaporator outlet temperature that preferentially raises.
Temperature emergent state controlling means for air conditioner compressor air suction port involved in the present invention comprises: when electric expansion valve began timing controlled, perception compressor air suction mouth temperature was at first judged the relation of compressor air suction mouth temperature and set temperature value; During less than set temperature value, send the control instruction that reduces expansion valve opening in compressor air suction mouth temperature to electric expansion valve; During more than or equal to set temperature value, the sensing evaporator outlet temperature judges whether evaporator outlet degree of superheat deviation is big in compressor air suction mouth temperature; When evaporator outlet degree of superheat deviation is big, then change from the aperture that increases expansion valve opening control electric expansion valve, in stable condition to reach the air-conditioner refrigerating operaton.
Description of drawings
Fig. 1 is the electric expansion valve timer control routine figure of the air-conditioner kind of refrigeration cycle of prior art.
Fig. 2 is a temperature emergent state controlling means for air conditioner compressor air suction port programme diagram of the present invention.
The specific embodiment
Combine the accompanying drawing specific embodiments of the invention to be described further at present.
As shown in Figure 2; Temperature emergent state controlling means for air conditioner compressor air suction port involved in the present invention comprises: when electric expansion valve begins timing controlled; Perception compressor air suction mouth temperature is at first judged the relation of the set temperature value of compressor air suction mouth temperature and 2 ℃; When compressor air suction mouth temperature＜2 ℃, send the control instruction that reduces expansion valve opening to electric expansion valve, reduce expansion valve opening with the control instruction of 6pulse/30s (6 pulses/30 second); When compressor air suction mouth temperature >=2 ℃, the sensing evaporator outlet temperature judges whether evaporator outlet degree of superheat deviation is big; Big in evaporator outlet degree of superheat deviation, promptly | outlet temperature-(inlet temperature+degree of superheat) | in the time of＞1 ℃, then change from the aperture that increases expansion valve opening control electric expansion valve, in stable condition to reach the air-conditioner refrigerating operaton.
Claims (3)
1. a temperature emergent state controlling means for air conditioner compressor air suction port is characterized in that, comprising: when electric expansion valve began timing controlled, perception compressor air suction mouth temperature was at first judged the relation of compressor air suction mouth temperature and set temperature value; During less than set temperature value, send the control instruction that reduces expansion valve opening in compressor air suction mouth temperature to electric expansion valve; During more than or equal to set temperature value, the sensing evaporator outlet temperature judges whether evaporator outlet degree of superheat deviation is big in compressor air suction mouth temperature; , then change from the aperture that increases expansion valve opening control electric expansion valve during greater than 1 ℃ in evaporator outlet degree of superheat deviation, in stable condition to reach the air-conditioner refrigerating operaton, evaporator outlet degree of superheat deviation does | outlet temperature-(inlet temperature+degree of superheat) |.
2. temperature emergent state controlling means for air conditioner compressor air suction port according to claim 1 is characterized in that, when judging the concerning of compressor air suction mouth temperature and set temperature value, set temperature value is 2 ℃.
3. temperature emergent state controlling means for air conditioner compressor air suction port according to claim 1; It is characterized in that sending the control instruction that reduces expansion valve opening to electric expansion valve is that control instruction with 6pulse/30s (6 pulses/30 second) reduces expansion valve opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100148269A CN101109592B (en) | 2006-07-19 | 2006-07-19 | Temperature emergent state controlling means for air conditioner compressor air suction port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100148269A CN101109592B (en) | 2006-07-19 | 2006-07-19 | Temperature emergent state controlling means for air conditioner compressor air suction port |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109592A CN101109592A (en) | 2008-01-23 |
| CN101109592B true CN101109592B (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100148269A Expired - Fee Related CN101109592B (en) | 2006-07-19 | 2006-07-19 | Temperature emergent state controlling means for air conditioner compressor air suction port |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478296B (en) * | 2010-11-24 | 2014-04-09 | 海尔集团公司 | Control device of multi-connected central air conditioning system and control method thereof |
| CN104006445B (en) * | 2013-02-26 | 2017-04-12 | 珠海格力电器股份有限公司 | Multi-linkage air conditioner and control method thereof |
| CN104344622B (en) * | 2013-07-25 | 2016-09-07 | 广东美的暖通设备有限公司 | Air-cooled heat pump cold-hot water machine and the antifreeze method of heat exchanger, system |
| CN104729172B (en) * | 2013-12-23 | 2017-01-18 | 珠海格力电器股份有限公司 | Air conditioner and capacity change judgment method |
| EP3012559B1 (en) | 2014-10-24 | 2018-08-15 | Danfoss A/S | Selecting control strategy for an expansion valve |
| CN106288567B (en) * | 2015-05-29 | 2019-03-22 | 青岛海尔空调电子有限公司 | Central air-conditioning starts control method |
| CN112032915A (en) * | 2020-08-24 | 2020-12-04 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
| CN112212462B (en) * | 2020-09-21 | 2023-04-25 | 青岛海尔空调电子有限公司 | Air conditioner and control method thereof |
| CN114353378B (en) * | 2021-12-15 | 2023-08-15 | 青岛海尔空调电子有限公司 | Heat pump unit control method and device and heat pump unit |
| CN115164428A (en) * | 2022-07-07 | 2022-10-11 | 四川长虹空调有限公司 | Air-cooled chiller system and control method thereof |
| WO2024045636A1 (en) * | 2022-08-27 | 2024-03-07 | 广东美的暖通设备有限公司 | Temperature adjusting method, electric control box, anti-condensation control method and air conditioner |
| CN115823786A (en) * | 2022-12-08 | 2023-03-21 | 珠海格力电器股份有限公司 | Unit anti-freezing control method and device and water chilling unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313493A (en) * | 2000-03-15 | 2001-09-19 | 开利公司 | Method for controlling electronic expansion valve by temperature difference of cooler and discharged extra heat |
| CN1363805A (en) * | 2002-02-06 | 2002-08-14 | 黄明 | Energy-saving control method and controller for air conditioner for changing working condition with load variation |
-
2006
- 2006-07-19 CN CN2006100148269A patent/CN101109592B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1313493A (en) * | 2000-03-15 | 2001-09-19 | 开利公司 | Method for controlling electronic expansion valve by temperature difference of cooler and discharged extra heat |
| CN1363805A (en) * | 2002-02-06 | 2002-08-14 | 黄明 | Energy-saving control method and controller for air conditioner for changing working condition with load variation |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2003-314907A 2003.11.06 |
| JP特开2005-55053A 2005.03.03 |
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| CN101109592A (en) | 2008-01-23 |
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