CN103388944A - Air-conditioning system and control method thereof - Google Patents
Air-conditioning system and control method thereof Download PDFInfo
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- CN103388944A CN103388944A CN2013103349503A CN201310334950A CN103388944A CN 103388944 A CN103388944 A CN 103388944A CN 2013103349503 A CN2013103349503 A CN 2013103349503A CN 201310334950 A CN201310334950 A CN 201310334950A CN 103388944 A CN103388944 A CN 103388944A
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Abstract
The invention provides an air-conditioning system and a control method thereof. The air-conditioning system comprises a refrigerant circulating loop and a controller, wherein the refrigerant circulating loop is mainly formed by connecting a compressor, a reversing valve, an indoor heat exchanger, an outdoor heat exchanger and an electronic expansion valve through a refrigerant pipeline; and the controller is used for controlling the air-conditioning system to operate. By virtue of the air-conditioning system provided by the invention, a refrigerant heater is additionally arranged between the outdoor heat exchanger and the electronic expansion valve of a throttling device; the refrigerant heater is controlled to be started, and the frequency of the compressor and the openness of the electronic expansion valve are correspondingly controlled according to actual working conditions, so that under the condition of non-reversing of the reversing valve in a heating mode, a frost layer on the outdoor heat exchanger can be molten; and meanwhile, the indoor heat exchanger continuously supplies heat to a room, the comfort of the air-conditioned room is ensured, and the air-conditioner using experience of a user under the low-temperature working condition is improved. The air-conditioning system is simple in structure, easy to control, reliable to operate and easy to implement. Compared with like products, the air-conditioning system has higher competitive advantages.
Description
Technical field
The invention belongs to air-conditioning technical field, more particularly, relate to a kind of can be when heating operation the not air-conditioning system of reverse cycle defrost and control method thereof.
Background technology
When the air regulator (hereinafter to be referred as air-conditioning) with heat pump used under worst cold case, after operation a period of time, outdoor heat exchanger can frosting, has increased thermal resistance and windage, the heat transfer effect variation, thus make comfortableness variation in room., for air-conditioning is normally moved, often need the frost of outer machine is removed.
Existing air-conditioned main Defrost mode is the cross valve commutation, by kind of refrigeration cycle, removes frost layer on outdoor heat exchanger.Although such Defrost mode can be removed the frost on heat exchanger, in the process of defrosting, indoor fan is out of service, and indoor heat exchanger absorbs heat from room, can not continue heat supply to room, reduce the comfortableness of room temperature, the user experiences can variation.
Summary of the invention
The object of the present invention is to provide a kind of air-conditioning system, reverse cycle defrost not while being intended to realize heating operation, thus improve the comfortableness of air-conditioned room, give the better experience of user.
For achieving the above object, the technical solution used in the present invention is: a kind of air-conditioning system is provided, and it comprises mainly the refrigerant circulation circuit that is connected to form by refrigerant pipeline by compressor, reversal valve, indoor heat exchanger, outdoor heat exchanger, electric expansion valve and the controller of controlling the air-conditioning system operation;
High-pressure liquid refrigerant pipeline between described outdoor heat exchanger and described electric expansion valve is provided with a refrigerant heater of being controlled its unlatching or being closed by described controller;
Be provided with its temperature of detection on described outdoor heat exchanger and also this temperature information fed back to the temperature inductor of described controller;
Described compressor is frequency-changeable compressor.
Preferably, described reversal valve is solenoid operated four-way valve, the air entry that the D mouth of pipe of described solenoid operated four-way valve, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe are connected corresponding and the exhaust outlet of described compressor, described indoor set, described compressor be connected off-premises station and be connected.
Alternatively, described refrigerant heater is electrothermal heater or electromagnetic heater.
Further, also be provided with a gas-liquid separator between the air entry of described compressor and described reversal valve.
For achieving the above object, the technical scheme that the present invention further provides is: a kind of control method of above-mentioned air-conditioning system comprises following control flow:
S11: start heating mode operation;
S12: described compressor is with frequency f 1 operation, and the control electronic expansion valve opening is L1;
S13: after described compressor start operation was accumulated at h1 minute, described temperature inductor detected described outdoor heat exchanger T3 temperature, and described controller judges according to following logic:
If T3＞t1, continue to remain on the S12 flow process;
If T3≤t1, enter the S14 flow process and defrost;
S14: open described refrigerant heater, make its generation heat and refrigerant carry out heat exchange;
S15: described compressor frequency is adjusted to the f2 operation, and described electronic expansion valve opening increases to L2;
S16: described temperature inductor detects the T3 temperature value and feeds back to described controller, and described controller judges whether to satisfy condition: T3 〉=t2 and continuous retention time reach h2 second;
If meet, enter next flow process S17;
If do not meet, stay at process S15, and the cumulative time;
S17: close described refrigerant heater, finish defrost process, system enters the S12 process flow operation.
Particularly, in described S12 flow process, L1≤500 steps.
Particularly, in described S15 flow process, L1≤L2≤500 steps.
Particularly, in described S15 flow process, f2 more than or equal to or less than f1.
air-conditioning system provided by the invention and control method beneficial effect thereof are: compared with prior art, air-conditioning system of the present invention is set up the refrigerant heater between outdoor heat exchanger and throttling arrangement electric expansion valve, open the refrigerant heater by control, and the frequency of control compressor corresponding to actual condition and the aperture of electric expansion valve, in the situation that under heating mode, reversal valve does not commutate, can be so that the thawing of the frost layer on outdoor heat exchanger, indoor heat exchanger is continuously the room heat supply simultaneously, guaranteed the comfortableness of air-conditioned room, improved user under worst cold case to the experience of air-conditioning, air-conditioning system structure of the present invention and control are simple, reliable, be easy to realize, has higher competitive advantage with respect to like product.
Description of drawings
The principle assumption diagram of the air-conditioning system that Fig. 1 provides for the embodiment of the present invention;
Running status figure under the refrigeration mode of the air-conditioning system that Fig. 2 provides for the embodiment of the present invention;
The air-conditioning system that Fig. 3 provides for the embodiment of the present invention heat with defrosting mode under running status figure;
The control flow chart of the control method of the air-conditioning system that Fig. 4 provides for the embodiment of the present invention.
In figure:
The 1-compressor; The 2-solenoid operated four-way valve; The 3-indoor heat exchanger; The 4-outdoor heat exchanger; The 5-electric expansion valve; 6-refrigerant heater; The 7-gas-liquid separator; 11-high-pressure liquid refrigerant pipeline, the 41-temperature inductor
The specific embodiment
, in order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
See also Fig. 1, the existing air-conditioning system that a preferred embodiment of the present invention is provided describes.Described air-conditioning system, it comprises mainly the refrigerant circulation circuit that is connected to form by refrigerant pipeline by compressor 1, reversal valve, indoor heat exchanger 3, outdoor heat exchanger 4, electric expansion valve 5 and the controller (not shown) of controlling the air-conditioning system operation; Wherein, the preferred solenoid operated four-way valve 2 of reversal valve, can certainly adopt two triple valves combination commutation to substitute, the air entry that the D mouth of pipe of this solenoid operated four-way valve 2, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe be connected correspondence and the exhaust outlet of described compressor 1, described indoor set, described compressor 1 be connected off-premises station and be connected.High-pressure liquid refrigerant pipeline 11 between described outdoor heat exchanger 4 and described electric expansion valve 5 is provided with the refrigerant heater 6 of being controlled its unlatching or being closed by described controller; Be provided with its temperature of detection on described outdoor heat exchanger 4 and also this temperature information fed back to the temperature inductor 41 of described controller; Described compressor 1 adopts frequency-changeable compressor, can automatically select heat, freeze and dehumidify drive manner according to environment temperature like this, make room reach rapidly at short notice needed temperature, and fluctuate with the less temperature difference under the slow-speed of revolution, low energy consumption state, realized quick, energy-conservation and comfortable temperature control effect.
In the present embodiment, described refrigerant heater 6, to adopt electrothermal heater or electromagnetic heater as good, not only is easy to realize, also convenient control.
In the present embodiment, one gas-liquid separator 7 preferably also is set between the air entry of described compressor 1 and described reversal valve, this gas-liquid separator 7 can prevent that liquid refrigerants from entering in compressor 1, and only allows gaseous coolant enter in compressor 1, prevents that compressor 1 from producing liquid hit phenomenon and causing the system failure.
The present invention also provides the control method of the air-conditioning system that a kind of above-described embodiment provides, this control method is controlled air-conditioning system running refrigerating pattern, be specially, open air-conditioning, and refrigerant heater 6 is in closed condition all the time, do not work, and cross valve 2 is in power-down state, its D mouth of pipe is communicated with the C mouth of pipe, the S mouth of pipe is communicated with the E mouth of pipe, and in system, refrigerant flows to as shown in the arrow in Fig. 2: compressor 1 → solenoid operated four-way valve 2 → outdoor heat exchanger 4 → refrigerant heater 6 electricity → magnetic expansion valve → indoor heat exchanger 3 → frequency-changeable compressor.
The present invention also provides the control method of the air-conditioning system that a kind of above-described embodiment provides, and this control method is controlled air-conditioning system operation and heated and defrosting mode, and when heater was not opened, in outdoor heat exchanger 4, the refrigerant evaporation heat absorption, absorbed heat from external environment condition; When heater was opened, refrigerant absorbed heat in heater, discharges simultaneously a part of heat and be used for defrosting in outdoor heat exchanger 4.
See also simultaneously Fig. 4, the control method that the present embodiment provides comprises following control flow:
S11: start heating mode operation; See also Fig. 3, at this moment, cross valve 2 is in power-up state, its D mouth of pipe is communicated with the E mouth of pipe, the S mouth of pipe is communicated with the C mouth of pipe, and in system, refrigerant flows to as shown in the arrow in Fig. 3: compressor 1 → solenoid operated four-way valve 2 → indoor heat exchanger 3 → electric expansion valve 5 → refrigerant heater 6 → outdoor heat exchanger 4 → frequency-changeable compressor.
S12: described compressor 1 is with frequency f 1 operation, and controlling electric expansion valve 5 apertures is L1; Wherein, LI preferably meets: L1≤500 steps;
S13: after described compressor 1 start operation was accumulated at h1 minute, described temperature inductor 41 detected described outdoor heat exchanger 4T3 temperature, and described controller judges according to following logic: wherein, h1 is the time parameter of determining according to experiment.
If T3＞t1, continue to remain on the S12 flow process;
If T3≤t1, enter the S14 flow process and defrost;
S14: open described refrigerant heater 6, make its generation heat and refrigerant carry out heat exchange, refrigerant is carried out heat temperature raising, outdoor heat exchanger 4T3 temperature is raise, and the frost layer on heat exchanger is melted;
S15: described compressor 1 frequency adjustment is to the f2 operation, and described electric expansion valve 5 apertures increase to L2; Wherein, f2 can more than or equal to or less than f1, viewing system concrete condition and determining, and the preferred L1≤L2 of the scope of L2≤500 steps; The cold medium flux of increase system like this, be conducive to remove the frost layer on outdoor heat exchanger 4;
S16: described temperature inductor 41 detects the T3 temperature value and feeds back to described controller, and described controller judges whether to satisfy condition: T3 〉=t2 and continuous retention time reach h2 second;
If meet, enter next flow process S17;
If do not meet, stay at process S15, and the cumulative time; Wherein, h2 is also the time parameter of determining according to experiment;
S17: close described refrigerant heater 6, finish defrost process, system enters the S12 process flow operation, namely the frequency of compressor 1 is recalled to the h1 operation, and the electromagnetic expanding valve aperture is reduced to former aperture L1.This moment, first defrosting cycle finished, and entered second defrosting cycle.
compared with prior art, air-conditioning system of the present invention is set up refrigerant heater 6 between outdoor heat exchanger 4 and throttling arrangement electric expansion valve 5, open refrigerant heater 6 by control, and the aperture of the frequency of control compressor 1 corresponding to actual condition and electric expansion valve 5, in the situation that under heating mode, reversal valve does not commutate, can be so that the thawing of the frost layer on outdoor heat exchanger 4, indoor heat exchanger 3 is continuously the room heat supply simultaneously, guaranteed the comfortableness of air-conditioned room, improved user under worst cold case to the experience of air-conditioning, air-conditioning system structure of the present invention and control are simple, reliable, be easy to realize, has higher competitive advantage with respect to like product.
The foregoing is only preferred embodiment of the present invention,, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. air-conditioning system, comprise mainly the refrigerant circulation circuit that is connected to form by refrigerant pipeline by compressor, reversal valve, indoor heat exchanger, outdoor heat exchanger, electric expansion valve and the controller of controlling the air-conditioning system operation; It is characterized in that:
High-pressure liquid refrigerant pipeline between described outdoor heat exchanger and described electric expansion valve is provided with a refrigerant heater of being controlled its unlatching or being closed by described controller;
Be provided with its temperature of detection on described outdoor heat exchanger and also this temperature information fed back to the temperature inductor of described controller;
Described compressor is frequency-changeable compressor.
2. air-conditioning system as claimed in claim 1, it is characterized in that: described reversal valve is solenoid operated four-way valve, the air entry that the D mouth of pipe of described solenoid operated four-way valve, the E mouth of pipe, the S mouth of pipe and the C mouth of pipe are connected corresponding and the exhaust outlet of described compressor, described indoor set, described compressor be connected off-premises station and be connected.
3. air-conditioning system as claimed in claim 1 or 2, it is characterized in that: described refrigerant heater is electrothermal heater or electromagnetic heater.
4. air-conditioning system as claimed in claim 1 or 2, is characterized in that: also be provided with a gas-liquid separator between the air entry of described compressor and described reversal valve.
5., as the control method of the described air-conditioning system of claim 1 to 4 any one, it is characterized in that:
The operation of start refrigeration mode;
Close described refrigerant heater.
6., as the control method of the described air-conditioning system of claim 1 to 4 any one, it is characterized in that:
Comprise following control flow:
S11: start heating mode operation;
S12: described compressor is with frequency f 1 operation, and the control electronic expansion valve opening is L1;
S13: after described compressor start operation was accumulated at h1 minute, described temperature inductor detected described outdoor heat exchanger T3 temperature, and described controller judges according to following logic:
If T3＞t1, continue to remain on the S12 flow process;
If T3≤t1, enter the S14 flow process and defrost;
S14: open described refrigerant heater, make its generation heat and refrigerant carry out heat exchange;
S15: described compressor frequency is adjusted to the f2 operation, and described electronic expansion valve opening increases to L2;
S16: described temperature inductor detects the T3 temperature value and feeds back to described controller, and described controller judges whether to satisfy condition: T3 〉=t2 and continuous retention time reach h2 second;
If meet, enter next flow process S17;
If do not meet, stay at process S15, and the cumulative time;
S17: close described refrigerant heater, finish defrost process, system enters the S12 process flow operation.
7. control method as claimed in claim 6 is characterized in that: in described S12 flow process, and L1≤500 steps.
8. control method as claimed in claim 6 is characterized in that: in described S15 flow process, and L1≤L2≤500 steps.
9. control method as described in claim 6 or 8 is characterized in that: in described S15 flow process, f2 more than or equal to or less than f1.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900222A (en) * | 2014-03-07 | 2014-07-02 | 广东美的暖通设备有限公司 | Method for cooling air conditioner electronic control frequency conversion module and air conditioner |
| CN104006451A (en) * | 2014-05-30 | 2014-08-27 | 广东美的集团芜湖制冷设备有限公司 | Freezing type dehumidifier |
| CN104807264A (en) * | 2014-01-23 | 2015-07-29 | 珠海格力电器股份有限公司 | Heat pump unit frosting restraining method and heat pump unit |
| CN104896647A (en) * | 2014-03-03 | 2015-09-09 | 合肥海尔空调器有限公司 | Cold air prevention control method and system of indoor unit of air conditioner |
| CN104990229A (en) * | 2015-07-28 | 2015-10-21 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
| CN106091505A (en) * | 2016-08-16 | 2016-11-09 | 广东美的暖通设备有限公司 | The defrosting control method of air-conditioner, defrosting control device and air-conditioner |
| CN106765945A (en) * | 2016-12-19 | 2017-05-31 | 广东美的制冷设备有限公司 | A kind of air-conditioner defrosting control method, device and air-conditioner |
| CN108758815A (en) * | 2018-06-20 | 2018-11-06 | 广东美的暖通设备有限公司 | Heat transmission equipment and its heat-production control method |
| CN108826582A (en) * | 2018-04-28 | 2018-11-16 | 四川长虹空调有限公司 | Low-temperature heating cold medium flux match control method and air-conditioning |
| CN110307601A (en) * | 2019-07-11 | 2019-10-08 | 广东美的制冷设备有限公司 | Air-conditioning system and air conditioner |
| CN110469967A (en) * | 2019-07-24 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN114719395A (en) * | 2022-03-17 | 2022-07-08 | 浙江中广电器集团股份有限公司 | Control method for solving abnormal noise of internal machine after defrosting |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807264B (en) * | 2014-01-23 | 2017-05-24 | 珠海格力电器股份有限公司 | Heat pump unit frosting restraining method and heat pump unit |
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| CN104896647A (en) * | 2014-03-03 | 2015-09-09 | 合肥海尔空调器有限公司 | Cold air prevention control method and system of indoor unit of air conditioner |
| CN104896647B (en) * | 2014-03-03 | 2018-03-20 | 合肥海尔空调器有限公司 | The anti-cold air control method and system of indoor apparatus of air conditioner |
| CN103900222A (en) * | 2014-03-07 | 2014-07-02 | 广东美的暖通设备有限公司 | Method for cooling air conditioner electronic control frequency conversion module and air conditioner |
| CN104006451A (en) * | 2014-05-30 | 2014-08-27 | 广东美的集团芜湖制冷设备有限公司 | Freezing type dehumidifier |
| CN104990229B (en) * | 2015-07-28 | 2017-11-10 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method |
| CN104990229A (en) * | 2015-07-28 | 2015-10-21 | 广东美的暖通设备有限公司 | Air conditioning system and control method thereof |
| CN106091505A (en) * | 2016-08-16 | 2016-11-09 | 广东美的暖通设备有限公司 | The defrosting control method of air-conditioner, defrosting control device and air-conditioner |
| CN106765945A (en) * | 2016-12-19 | 2017-05-31 | 广东美的制冷设备有限公司 | A kind of air-conditioner defrosting control method, device and air-conditioner |
| CN106765945B (en) * | 2016-12-19 | 2019-11-08 | 广东美的制冷设备有限公司 | A kind of air conditioner defrosting control method, device and air conditioner |
| CN108826582A (en) * | 2018-04-28 | 2018-11-16 | 四川长虹空调有限公司 | Low-temperature heating cold medium flux match control method and air-conditioning |
| CN108826582B (en) * | 2018-04-28 | 2020-11-10 | 四川长虹空调有限公司 | Low-temperature heating refrigerant flow matching control method and air conditioner |
| CN108758815A (en) * | 2018-06-20 | 2018-11-06 | 广东美的暖通设备有限公司 | Heat transmission equipment and its heat-production control method |
| CN110307601A (en) * | 2019-07-11 | 2019-10-08 | 广东美的制冷设备有限公司 | Air-conditioning system and air conditioner |
| CN110469967A (en) * | 2019-07-24 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469967B (en) * | 2019-07-24 | 2022-05-31 | 重庆海尔空调器有限公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN114719395A (en) * | 2022-03-17 | 2022-07-08 | 浙江中广电器集团股份有限公司 | Control method for solving abnormal noise of internal machine after defrosting |
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Application publication date: 20131113 |