CN101539322B - Method for controlling electronic expansion valve of heating standby indoor unit - Google Patents
Method for controlling electronic expansion valve of heating standby indoor unit Download PDFInfo
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- CN101539322B CN101539322B CN 200910097294 CN200910097294A CN101539322B CN 101539322 B CN101539322 B CN 101539322B CN 200910097294 CN200910097294 CN 200910097294 CN 200910097294 A CN200910097294 A CN 200910097294A CN 101539322 B CN101539322 B CN 101539322B
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Abstract
The invention relates to a method for controlling an electronic expansion valve of a heating standby indoor unit, and the method comprises the following steps: (1) the judgment of whether a micro-processor of the indoor unit (8) is in the heating standby state or not is carried out; (2) the micro-processor adjusts the open degree of the corresponding indoor electronic expansion valve (7) to 60-80 steps; and (3) the micro-processor regulates the corresponding indoor electronic expansion valve (7) by two principles that (T1 minus T3) is less than 5 and (T1 minus T3) is not less than 5 according to the temperatures which are returned by a liquid pipe temperature sensor (9), an indoor heat exchanger coil pipe temperature sensor (10) and an indoor environment temperature sensor (11) in each 60s. Compared with the prior method, the method is characterized in that the method can effectively ensure the system to operate stably and improve the heating effect of a system.
Description
Technical field:
The present invention relates to a kind of indoor set electronic Expansion Valve Control method of heating standby.
Background technology:
One drags changeable frequency air-conditioner, an outer machine can drag many indoor set operations, not only saved the installing space of off-premises station, and have system simple, compact conformation, comfortable are installed, each room independent regulation operation, can satisfy the not different air conditioner load requirements of chummery, combination property coefficient height, advantage such as energy-conservation.Along with expanding economy, one drags changeable frequency heat pump air conditioner, and the use in the family is more and more widely at home.
One drags changeable frequency air-conditioning unit, and each indoor set all has corresponding electric expansion valve.And only some does heating operation in many indoor sets, and a part is set the indoor set that start or indoor temperature reach design temperature in addition, and blower fan is in halted state, claims these indoor sets to be in the heating standby state in the industry.Be in the indoor set of heating standby state, heat exchanger still can carry out heat transfer free convection with the indoor set environment, the high pressure refrigerant of gaseous state can condensation gradually in heat exchanger, and the method for prior art is to keep certain aperture constant the electric expansion valve of correspondence, do not regulate, in the process of operation, following two kinds of situations will occur like this:
1, when excessive situation appears in the electronic expansion valve opening of setting, increased the circulation of the indoor set gaseous coolant of heating standby operation like this, gaseous coolant turns back to the fluid reservoir of off-premises station by indoor electric expansion valve, increased the enthalpy of refrigerant in the fluid reservoir, heat absorption capacity after the throttling of refrigerant in the reduction fluid reservoir, thus make the efficiency of machine system reduce;
2, when too small situation appearred in the electronic expansion valve opening of setting, the cold-producing medium in the unit will be deposited in the indoor set of standby gradually like this, and the cold-producing medium that causes circulating in the system lacks, and crosses high fault and compressor exhaust temperature occurs.
Therefore, the control method of prior art exists system's fluctuation of service, and system heats the low problem of usefulness.
Summary of the invention:
The present invention is directed to above problem provides a kind of and can guarantee effectively that system is stable, and the raising system heats the indoor set electronic Expansion Valve Control method of the heating standby of usefulness.
The present invention overcomes the above problems used technical scheme: a kind of indoor set electronic Expansion Valve Control method of heating standby may further comprise the steps:
(1), be in the indoor machine microprocessor of holding state and the controller of off-premises station carries out communication, determine that the microprocessor of indoor set is in the heating standby state;
(2), the aperture in 60～80 steps is transferred to the aperture of the indoor electric expansion valve of correspondence by microprocessor;
(3), the temperature passed back according to liquid pipe temperature sensor, indoor heat exchanger coil temperature sensor and indoor environment temperature sensor of the every 60S of microprocessor, the aperture of the indoor electric expansion valve of correspondence is regulated once by following principle:
The temperature of setting liquid pipe temperature sensor measurement is T1, and the temperature of setting indoor heat exchanger coil temperature sensor mensuration is T2, and the temperature of setting indoor environment temperature sensor mensuration is T3;
Principle 1., if (T1-T3)＜5, then the aperture of Dui Ying indoor electric expansion valve is kept 60～80 apertures that go on foot;
Principle 2., if (T1-T3) 〉=5, microprocessor is target with T2-T1=3, and the indoor electric expansion valve of correspondence is regulated.
2. after regulating by described principle, the aperture after corresponding indoor electric expansion valve is regulated is:
The aperture of aperture+this adjusting before aperture=adjusting after corresponding indoor electric expansion valve is regulated
The aperture of this adjusting=(T2-T1-3) * 2.
After adopting above method, the present invention compared with prior art, owing to adopted three temperature sensors to judge,, can prevent effectively that the too small or excessive situation of aperture from appearring in indoor electric expansion valve according to the aperture that different situations is come electric expansion valve in the conditioning chamber.Therefore the present invention can guarantee effectively that system is stable, and the raising system heats usefulness.
Description of drawings:
Accompanying drawing is the electrical schematic diagram of the indoor set electronic Expansion Valve Control method of heating standby of the present invention.
As shown in the figure: 1, compressor, 2, gas-liquid separator, 3, cross valve, 4, the off-premises station heat exchanger, 5, outdoor electric expansion valve, 6, reservoir, 7, indoor electric expansion valve, 8, indoor set, 9, liquid pipe temperature sensor, 10, indoor heat exchanger coil temperature sensor, 11, the indoor environment temperature sensor, 12, the tracheae temperature sensor.
The specific embodiment:
Below in conjunction with the drawings and specific embodiments, the present invention is described further:
As shown in drawings, an off-premises station is provided with the indoor set 8 of a plurality of parallel connections and the pipeline of interior electric expansion valve 7 compositions of its respective chamber/chambers.During the frequency conversion heat pump operation of air conditioner, the gases at high pressure that compressor 1 is discharged enter indoor set 8 through cross valve 3 and carry out condensation, liquid is through the suitable reservoir 6 of regulating the outer unit of back inlet chamber of indoor electric expansion valve 7 after the condensation, after entering reservoir 6, need through outdoor electric expansion valve 5, outdoor electric expansion valve 5 is controlled by microprocessor, the refrigerant that reservoir 6 is come out carries out throttling, the outer machine heat exchanger 4 of gas-liquid mixed refrigerant inlet chamber after the throttling evaporates, again through cross valve 3 commutations, enter gas-liquid separator 2, the gas after gas-liquid separator 2 separates enters compressor 1 recompression, thereby finishes a heat pump cycle.Wherein be respectively equipped with liquid pipe temperature sensor 9 and indoor heat exchanger coil temperature sensor 10 on pipeline between indoor set 8 one ends and its corresponding indoor electric expansion valve 7 and the heat exchange coil, be used for gathering the temperature data of pipeline and heat exchanger dish; Indoor set 8 is provided with indoor environment temperature sensor 11, is used for gathering the data of indoor temperature; The pipeline of indoor set 8 other ends is provided with tracheae temperature sensor 12, is used for gathering the temperature data on the pipeline.Indoor electric expansion valve 7 pipelines that other indoor set 8 in parallel is corresponding with it are same as described above.Also have the accessory of some systems not show in the accompanying drawing.
A kind of indoor set electronic Expansion Valve Control method of heating standby may further comprise the steps:
Below be example with the pipeline of one tunnel indoor set wherein 8 corresponding indoor electric expansion valve 7 with it:
(1), be in the microprocessor of indoor set 8 of holding state and the controller of off-premises station carries out communication, determine that the microprocessor of indoor set 8 is in the heating standby state;
(2), the aperture in 70 steps is transferred to the aperture of the indoor electric expansion valve 7 of correspondence by microprocessor;
(3), the temperature passed back according to liquid pipe temperature sensor 9, indoor heat exchanger coil temperature sensor 10 and indoor environment temperature sensor 11 of the every 60S of microprocessor, the aperture of the indoor electric expansion valve 7 of correspondence is regulated once by following principle:
The temperature of setting liquid pipe temperature sensor 9 mensuration is T1, and the temperature of setting indoor heat exchanger coil temperature sensor 10 mensuration is T2, and the temperature that setting indoor environment temperature sensor 11 is measured is T3;
Principle 1., if (T1-T3)＜5, then the aperture of Dui Ying indoor electric expansion valve 7 is kept 70 apertures that go on foot;
Principle 2., if (T1-T3) 〉=5, microprocessor is target with T2-T1=3, and the indoor electric expansion valve 7 of correspondence is regulated.
After 2. described principle regulated, the aperture of corresponding indoor electric expansion valve 7 was:
The aperture of aperture+this adjusting before aperture=adjusting after corresponding indoor electric expansion valve 7 is regulated
The aperture of this adjusting=(T2-T1-3) * 2.
Above embodiment only is a preferable embodiment of the present invention, and the present invention also allows other variation.
Claims (3)
1. the indoor set electronic Expansion Valve Control method of a heating standby is characterized in that: may further comprise the steps:
(1), be in the microprocessor of several indoor sets (8) of holding state and the controller of off-premises station carries out communication, determine that the microprocessor of several indoor sets (8) is in the heating standby state;
(2), the aperture in 60～80 steps is transferred to the aperture of the indoor electric expansion valve (7) of correspondence by microprocessor;
(3), the temperature passed back according to liquid pipe temperature sensor (9), indoor heat exchanger coil temperature sensor (10) and indoor environment temperature sensor (11) of the every 60S of microprocessor, the aperture of the indoor electric expansion valve (7) of correspondence is regulated once by following principle:
The temperature of setting liquid pipe temperature sensor (9) mensuration is T1, and the temperature of setting indoor heat exchanger coil temperature sensor (10) mensuration is T2, and the temperature that setting indoor environment temperature sensor (11) is measured is T3;
Principle 1., if (T1-T3)＜5, then the aperture of Dui Ying indoor electric expansion valve (7) is kept 60～80 apertures that go on foot;
Principle 2., if (T1-T3) 〉=5, microprocessor is target with T2-T1=3, and the indoor electric expansion valve (7) of correspondence is regulated.
2. the indoor set electronic Expansion Valve Control method of heating standby according to claim 1 is characterized in that: described principle 1. in, corresponding indoor electric expansion valve (7) is kept the apertures in 70 steps.
3. the indoor set electronic Expansion Valve Control method of heating standby according to claim 1 is characterized in that: after 2. described principle regulated, the aperture of corresponding indoor electric expansion valve (7) was:
The aperture of aperture+this adjusting before aperture=adjusting after corresponding indoor electric expansion valve (7) is regulated
The aperture of this adjusting=(T2-T1-3) * 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910097294 CN101539322B (en) | 2009-03-31 | 2009-03-31 | Method for controlling electronic expansion valve of heating standby indoor unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910097294 CN101539322B (en) | 2009-03-31 | 2009-03-31 | Method for controlling electronic expansion valve of heating standby indoor unit |
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| CN101539322A CN101539322A (en) | 2009-09-23 |
| CN101539322B true CN101539322B (en) | 2011-06-01 |
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| CN 200910097294 Active CN101539322B (en) | 2009-03-31 | 2009-03-31 | Method for controlling electronic expansion valve of heating standby indoor unit |
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Inventor after: Zheng Jianjiang Inventor after: Liu Zhisheng Inventor before: Liu Zhisheng |
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Free format text: CORRECT: INVENTOR; FROM: LIU ZHISHENG TO: ZHENG JIANJIANG LIU ZHISHENG |
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Address after: 315191 Zhejiang city of Ningbo province Yinzhou District Jiangshan town Light Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Yinzhou District Jiangshan town Light Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |