CN101603701A - A kind of air-conditioner and auxiliary heating method thereof with auxiliary heating combined equipment - Google Patents

A kind of air-conditioner and auxiliary heating method thereof with auxiliary heating combined equipment Download PDF

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Publication number
CN101603701A
CN101603701A CNA200810028848XA CN200810028848A CN101603701A CN 101603701 A CN101603701 A CN 101603701A CN A200810028848X A CNA200810028848X A CN A200810028848XA CN 200810028848 A CN200810028848 A CN 200810028848A CN 101603701 A CN101603701 A CN 101603701A
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air
conditioner
temperature
compressor
heat exchanger
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CN101603701B (en
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招伟
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TCL Corp
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TCL Corp
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Abstract

The invention discloses a kind of air-conditioner and auxiliary heating method thereof with auxiliary heating combined equipment, this air-conditioner comprises: central control unit, compressor, indoor heat exchanger, outdoor heat exchanger, be configured between compressor and outdoor and the indoor heat converter cross valve that switches refrigerant path, and be connected the magnetic valve between the input of the output of compressor and indoor heat exchanger; Described auxiliary heating combined equipment comprises: temperature sensor, in order to the delivery temperature of detection compressor and the surface temperature of indoor heat exchanger; Comparator is made comparisons in order to the compressor exhaust temperature that will be detected and indoor heat exchanger surface temperature and design temperature, produces also output comparison signal; And valve positioner, open in order to control valve opening solenoid when signal satisfies, realize auxiliary heating; When signal does not satisfy, the control closed electromagnetic valve.This air-conditioner can improve heating efficiency, can also make air-conditioning system be not easy the stability of frosting and assurance air-conditioning heating operation simultaneously.

Description

A kind of air-conditioner and auxiliary heating method thereof with auxiliary heating combined equipment
Technical field
The present invention relates to the air-conditioner field, particularly when adopting parallel-flow heat exchanger to make the off-premises station heat exchanger, the auxiliary heat-production control method of air-conditioner and corresponding structure thereof are improved.
Background technology
At present the outdoor heat exchanger at the room air conditioner of usefulness is to adopt copper tube and fin formula heat exchanger mostly, and the shortcoming of this heat exchanger is that the consumption rate of copper is bigger, and heat exchange efficiency is lower simultaneously; Advantage is a drainability of being convenient to the heat exchanger surface condensed water, and defrosting effect is obvious.
Parallel-flow heat exchanger is an all-aluminium construction, and it is low to have a cost, heat exchange efficiency height, advantage such as the air-conditioning system refrigerant charge is few; Parallel-flow heat exchanger is as the off-premises station heat exchanger, when the air-conditioning heating operation, because the structure of itself, the condensed water of heat exchanger surface is difficult to be drained, air-conditioning system is easy to frosting, and has shortcomings such as the defrosting of being difficult to is clean again, and these shortcomings make air-conditioning system need frequent defrosting, air-conditioning can not effectively heat even can not heat, so these shortcomings are difficult to as heat exchanger applications on room air conditioner parallel-flow heat exchanger.
Chinese patent CN2540593 discloses a kind of auxiliary central air-conditioning that heats, and it mainly is connected with an auxiliary electric heater unit on the return pipe of heat pump or outlet pipe.Make it can carry out effectively replenishing to the deficiency of heat pump heating capacity lower winter at temperature.Though, utilize auxiliary electrically heated method also can solve the above problems,, we need seek a kind of replacement technology of renewal, to reach the purpose of more energy-conservation and intelligent control.
Summary of the invention
The technical problem to be solved in the present invention is, by optimizing air-conditioner structure and the control method that adopts parallel-flow heat exchanger, a kind of domestic air conditioning and auxiliary heat-production control method thereof that the auxiliary function that heats is not easy frosting simultaneously again that have is provided, guarantee the stability of air-conditioning heating operation, and improve heating efficiency.
Realize that technical scheme of the present invention is: a kind of air-conditioner with auxiliary heating combined equipment, described air-conditioner comprises: central control unit, compressor, indoor heat exchanger, outdoor heat exchanger, be configured between compressor and outdoor and the indoor heat converter cross valve that switches refrigerant path, and be connected the magnetic valve between the input of the output of compressor and indoor heat exchanger; It is characterized in that: described auxiliary heating combined equipment comprises:
Temperature sensor is in order to the delivery temperature of detection compressor and the surface temperature of outdoor parallel-flow heat exchanger;
Comparator is made comparisons in order to the compressor exhaust temperature that will be detected and outdoor parallel-flow heat exchanger surface temperature and design temperature, produces also output comparison signal; And
Valve positioner opens in order to control valve opening solenoid when signal satisfies, and realizes auxiliary heating; When signal does not satisfy, the control closed electromagnetic valve.
Realize the auxiliary heat-production control method of above-mentioned air-conditioner, it is characterized in that being preset with in the air-conditioner design temperature T1, T2, T3, T1＜T3＜T2 wherein, when air-conditioner entered heating operation pattern subprogram, it comprised the steps:
A. the heat exchange temperature TA and the design temperature T1 that are detected of C.T sensor, when TA＞T1, air-conditioner moves normal heating mode;
B. when evaporimeter temperature TA for the first time≤design temperature T1, air-conditioner execution Defrost operation;
C. when evaporimeter temperature TA again≤design temperature T1, compressor exhaust temperature TB that the C.T sensor is detected and design temperature T2, when TB＜T2, air-conditioner is carried out Defrost operation;
D. as compressor exhaust temperature TB 〉=design temperature T2, magnetic valve is opened, and auxiliary heating operation begins;
E. relatively whether compressor exhaust temperature TB is greater than design temperature T3, and when TB＜T3, air-conditioner is carried out Defrost operation; When compressor exhaust temperature TB 〉=design temperature T3, enter next step;
F. the heat exchange temperature TA and the design temperature T1 that are detected of C.T sensor, when TA＞T1, closed electromagnetic valve, auxiliary heating operation finishes, and air-conditioner is got back to normal heating mode; When TA≤T1, get back to step D.
As the further improvement of said method, further comprising the steps of before the described steps A:
Set compressor and heat running time T M1 and the auxiliary heating operation time T F1 of compressor;
Compare compressor actual heating operation time T M and setting-up time TM1 that timer detects, as TM＜TM1, air-conditioner moves normal heating mode; As TM 〉=TM1, air-conditioner enters steps A.
As the further improvement of said method, further comprising the steps of between described step e and the F:
Compare actual auxiliary heating operation time T F of compressor and setting-up time TF1 that timer detects, as TF＞TF1, air-conditioner is carried out Defrost operation; As TF≤TF1, air-conditioner enters step F.
Control method with air-conditioner and auxiliary heating operation of auxiliary heat-production functions provided by the present invention, because whole auxiliary heating in the process, the program that heats of air-conditioner itself can not be interrupted, can in needs, in time defrost again simultaneously, therefore can reduce high frequent starts, the stability that can keep air-conditioning heating effect and heating operation, energy savings.
Description of drawings
Fig. 1 is the refrigeration system schematic diagram of the auxiliary heating combined equipment of band; Fig. 2 is the heating operation schematic diagram of the air-conditioner of band servicing unit; Fig. 3 is auxiliary the heat schematic diagram of air-conditioner when heating operation of band servicing unit; Fig. 4 auxiliary heats control flow chart, because of one page paper can't be put into, so be divided into two pages of Fig. 4 a and Fig. 4 b.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further specified.
At first need in the present embodiment traditional room air conditioner system is improved.Room air conditioner system after the improvement as shown in Figure 1.This room air conditioner system diagram mainly comprises: parts such as compressor 1, cross valve 2, magnetic valve 3, outdoor parallel-flow heat exchanger 4, sensor 5, capillary 6, indoor heat exchanger 7, compressor exhaust temperature sensor 8 are formed.In addition, also comprise in the air-conditioner system: central control unit, timer, comparator and valve positioner, timer, comparator and valve positioner are solidificated in the central control unit.
The flow process that normally heats of air-conditioning system is: as shown in Figure 2, compressor 1 operation, the gas refrigerant of discharging HTHP is behind cross valve 2, the liquid refrigerant of warm high pressure in indoor heat exchanger 7 is condensed into again, again after capillary 6 throttlings become the liquid refrigerant of low-temp low-pressure, flash to the gas refrigeration of low-temp low-pressure through outdoor parallel-flow heat exchanger 4, behind cross valve 2, get back to compressor 1 again.Thereby enter the circulation that heats of a new round.
The flow process of the auxiliary heating operation of air-conditioning system is: as shown in Figure 3, compressor 1 operation, discharge the gas refrigerant separated into two parts of HTHP, the gas refrigerant of first's HTHP is behind cross valve 2, the liquid refrigerant of warm high pressure in indoor heat exchanger 7 is condensed into again becomes the liquid refrigerant of low-temp low-pressure again through capillary 6 throttlings; Parallel-flow heat exchanger 4 outside the inlet chamber again after the liquid refrigerant that the magnetic valve 3 of the gas refrigerant of second portion HTHP through opening directly become low-temp low-pressure with first mixes, thereby improve the evaporating temperature of outdoor parallel-flow heat exchanger 4, through flashing to the gas refrigeration of low-temp low-pressure, behind cross valve 2, get back to compressor again.Thereby enter the circulation that heats of a new round.Simultaneously, heat and be not interrupted.
The explanation of various control parameters and value such as following table 1:
The control parameter Parameter declaration Parameter value
??TM The actual heating operation time of compressor ??/
??TM1 Compressor is set the heating operation time TM1=20 minute
??TA Outdoor parallel-flow heat exchanger surface temperature ??/
??TB The compressor exhaust temperature sensor ??/
??TF The auxiliary actual run time that heats ??/
??TF1 Auxiliary heating set running time TM=12 minute
??T1 Outdoor parallel-flow heat exchanger surface temperature ??0℃
??T2 Compressor exhaust temperature ??55℃
??T3 Compressor exhaust temperature ??50℃
Concrete control step can be as follows:
As shown in Figure 4, at first,,, then continue to carry out for the 1st step if compressor operating time TM is less than TM1 (20 minutes) when air-conditioning enters heating operation pattern control subprogram A.After full TM1 minute, carry out next step up to compressor operating.
Behind air-conditioning stable operation TM1,, then continued to carry out the 2nd step if sensor 5 detects parallel-flow heat exchanger temperature T A not less than design temperature T1 (0 ℃).When TA every 20 seconds and satisfy TA≤T1 for 3 times and carried out for the 3rd step continuously.
Step 3 judges whether parallel-flow heat exchanger 4 surface temperature TA are to satisfy for the first time to satisfy TA≤T1 every 20 seconds and continuous 3 times.If for the first time, then carry out Defrost operation.Satisfy TA≤T1 if satisfy for the second time every 20 seconds and continuous 3 times, then carry out next step control.In other words, the purpose that this step is judged is to judge that air-conditioning is between continuous operating period, whether be that the 1st operation heating operation pattern controlled subprogram A or operation heating operation pattern control subprogram A more than the 2nd time, if the 1st operation heating operation pattern control subprogram A, satisfying TA≤T1, then carry out Defrost operation every 20 seconds and continuous 3 times.
If step 4 is to detect compressor exhaust temperature TB by sensor 8 can not continue to satisfy TB 〉=T2 (55 ℃), show the poor effect of the auxiliary heating operation of air-conditioning exactly or do not have effect, can only carry out Defrost operation.If compressor exhaust temperature TB continues to satisfy TB 〉=T2, show that air-conditioning can carry out auxiliary heating operation.
Step 5: magnetic valve is opened, and auxiliary heating operation begins.During auxiliary heating operation, normally heating of air-conditioning is not interrupted, but heating effect also can weaken with the increase of auxiliary heating operation time.
Step 6: because during the auxiliary heating operation of compressor, the delivery temperature of compressor can constantly reduce, when compressor exhaust temperature is too low, auxiliary heating operation will not have effect.This step control is to detect compressor row temperature in real time whether can satisfy auxiliary heating operation.When compressor exhaust temperature continues TB 〉=T3 (50 ℃), can keep auxiliary heating operation, carry out next step judgement.When compressor exhaust temperature TB continues 60 seconds≤T3, then carry out Defrost operation.
Step 7 is the auxiliary heating operation time of control, if air-conditioning system assists the time that heats oversize, to the later stage, heating effect can descend rapidly, descends rapidly for fear of heating effect, just must control the time of auxiliary heating operation.If the auxiliary heating operation time of system, then air-conditioning entered defrosting control greater than TF1 (12 minutes); If the auxiliary heating operation time of system is then carried out next step less than TF1.Certainly, air-conditioning only lacks cold-producing medium and heats under hot conditions in refrigeration system, if just may go out the auxiliary heating operation time of system greater than TF1.
Step 8 is when satisfying step 3 ~ step 7 at the same time, just begins to judge.When sensor 5 detects outdoor parallel-flow heat exchanger surface temperature TA every 20 seconds and continuous when satisfying TA 〉=T1 for 3 times, closed electromagnetic valve, auxiliary heating operation finishes.Reenter heating operation subprogram A, when TA every 20 seconds and continuous can not satisfy TA 〉=T1 for 3 times the time, then turn back to control step 5, and begin to carry out a new round from step 5 and judge.
Wherein: step 1 to step 2 is normal heating operations of air-conditioning.Air-conditioning enters heating operation pattern control subprogram A, after full TM1 minute, carries out next step up to compressor operating.The purpose of this step operation is to make air-conditioner energy stable operation a period of time, makes the parameter stability that samples.Also avoid air-conditioning when heating operation, frequently to carry out Defrost operation in addition.Behind air-conditioning stable operation TM1, when TA every 20 seconds and satisfy TA≤T1 for 3 times and carried out for the 3rd step continuously.
Step 3 to step 4 is to judge whether air-conditioning system satisfies the condition of auxiliary heating operation.The 3rd step judged whether parallel-flow heat exchanger surface temperature TA is to satisfy condition for the first time.If for the first time, then carry out Defrost operation.Kong Zhi purpose is to prevent that air-conditioning air-conditioning system when last once Defrost operation is unclean from shutting down for some reason like this; the surface frost layer of outdoor concurrent flow evaporation does not melt clean; air-conditioning is start operation once more just, and air-conditioning outdoor parallel-flow heat exchanger after operation is reach TM1 minute has been tied full frost.Satisfy TA≤T1 if satisfy for the second time every 20 seconds and continuous 3 times, then carry out the control in the 4th step.The control purpose in the 4th step is that the judgement air-conditioning system can be assisted heating operation.If compressor exhaust temperature TB can not continue to satisfy TB 〉=T2, show the poor effect of the auxiliary heating operation of air-conditioning exactly or do not have effect, can only carry out Defrost operation.Certainly, this situation possibility is very low, when only existing air-conditioning system to break down or air-conditioning system when heating under ultralow temperature, just can occur.If compressor exhaust temperature TB continues to satisfy TB 〉=T2, show that air-conditioning can carry out auxiliary heating operation.
Step 5 to step 8 is after beginning auxiliary heating operation, judges whether air-conditioning system needs to finish auxiliary heating operation.The control operation that realizes auxiliary heating operation in the step 5 is to realize by the control magnetic valve.Step 6 is to judge whether that according to compressor exhaust temperature needs withdraw from auxiliary system operation.During the auxiliary heating operation of compressor, the delivery temperature of compressor can constantly reduce, and when compressor exhaust temperature is too low, auxiliary heating operation will not have effect.This step control is to detect compressor row temperature in real time whether can satisfy auxiliary heating operation.
Step 7 is to judge whether that according to the auxiliary heating operation time needs withdraw from auxiliary system operation.This step is the auxiliary heating operation time of control, if air-conditioning system assists the time that heats oversize, to the later stage, heating effect can descend rapidly, descends rapidly for fear of heating effect, just must control the time of auxiliary heating operation.
Step 8 is to judge whether that according to off-premises station heat exchanger surface temperature needs withdraw from auxiliary system operation.Step 8 is when satisfying step 3 to step 7 at the same time, just begins to judge.
Because the method for Defrost operation control has a lot, mention in this patent control method and enter Defrost operation, can adopt conventional, general Defrost technology to realize, say simply, promptly be that heating operation is changed into refrigerating operaton and recovers heating operation again according to certain condition.Owing to do not relate to improvement in this patent, do not introduce in detail this current techique.

Claims (7)

1, a kind of air-conditioner with auxiliary heating combined equipment, described air-conditioner comprises: central control unit, compressor, indoor heat exchanger, outdoor heat exchanger, be configured between compressor and outdoor and the indoor heat converter cross valve that switches refrigerant path, and be connected the magnetic valve between the input of the output of compressor and indoor heat exchanger; It is characterized in that described auxiliary heating combined equipment comprises:
Temperature sensor is in order to the delivery temperature of detection compressor and the surface temperature of outdoor parallel-flow heat exchanger;
Comparator is made comparisons in order to the compressor exhaust temperature that will be detected and outdoor parallel-flow heat exchanger surface temperature and design temperature, produces also output comparison signal; And
Valve positioner opens in order to control valve opening solenoid when signal satisfies, and realizes auxiliary heating; When signal does not satisfy, the control closed electromagnetic valve.
2, a kind of auxiliary heat-production control method that is used for the described air-conditioner of claim 1 is characterized in that: be preset with design temperature T1, T2, T3 in the air-conditioner, and T1＜T3＜T2 wherein, when air-conditioner entered heating operation pattern subprogram, it comprised the steps:
A. the outdoor parallel-flow heat exchanger temperature T A and the design temperature T1 that are detected of C.T sensor, when detecting for the first time evaporimeter temperature TA≤design temperature T1, air-conditioner execution Defrost operation;
B. when detecting evaporimeter temperature TA≤design temperature T1 again, compressor exhaust temperature TB that the C.T sensor is detected and design temperature T2, when TB＜T2, air-conditioner is carried out Defrost operation;
C. as the compressor exhaust temperature TB 〉=design temperature T2 of air-conditioner, auxiliary heating unit starts;
D. relatively whether compressor exhaust temperature TB is greater than design temperature T3, and when TB＜T3, air-conditioner is carried out Defrost operation; When compressor exhaust temperature TB 〉=design temperature T3, enter next step;
E. the outdoor parallel-flow heat exchanger temperature T A and the design temperature T1 that are detected of C.T sensor, when TA＞T1, closed electromagnetic valve, auxiliary heating operation finishes, and air-conditioner is got back to normal heating mode; When TA≤T1, get back to step D.
3, the auxiliary heat-production control method of air-conditioner according to claim 2 is characterized in that, and is further comprising the steps of before the described steps A:
In air-conditioner, set compressor and heat running time T M1 and the auxiliary heating operation time T F1 of compressor;
Compare compressor actual heating operation time T M and setting-up time TM1, as TM＜TM1, air-conditioner moves normal heating mode; As TM 〉=TM1, air-conditioner enters steps A.
4, the auxiliary heat-production control method of air-conditioner according to claim 2 is characterized in that described T1=0 ℃.
5, according to claim 2 or the auxiliary heat-production control method of 3 or 4 described air-conditioners, it is characterized in that, further comprising the steps of between described step D and the E:
Compare actual auxiliary heating operation time T F of compressor and setting-up time TF1, as TF＞TF1, air-conditioner is carried out Defrost operation; As TF≤TF1, air-conditioner enters step e.
6, the auxiliary heat-production control method of air-conditioner according to claim 2 is characterized in that described steps A is: when for the first time every 20 seconds and continuous when satisfying evaporimeter temperature TA≤design temperature T1 for 3 times, air-conditioner execution Defrost operation.
7, according to claim 2 or the auxiliary heat-production control method of 6 described air-conditioners, it is characterized in that, described step B is: when again every 20 seconds and continuous when satisfying evaporimeter temperature TA≤design temperature T1 for 3 times, compare compressor exhaust temperature TB and design temperature T2, when TB＜T2, air-conditioner is carried out Defrost operation; When TB 〉=T2, carry out next step.
CN200810028848XA 2008-06-13 2008-06-13 Auxiliary heating method of air conditioner with auxiliary heating device Expired - Fee Related CN101603701B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331121A (en) * 2011-08-10 2012-01-25 Tcl空调器(中山)有限公司 Air conditioner and control method thereof
CN102589218A (en) * 2011-11-30 2012-07-18 青岛海尔空调电子有限公司 Method for monitoring detachment of exhaust temperature sensor of air conditioning compressor
CN103424211A (en) * 2012-05-17 2013-12-04 珠海格力电器股份有限公司 Method and device for detecting thermal bulb of compressor and outdoor unit
CN104791969A (en) * 2015-04-30 2015-07-22 广东美的制冷设备有限公司 Temperature compensation device and air-conditioner
CN104879973A (en) * 2015-04-29 2015-09-02 广东美的制冷设备有限公司 Air conditioning system and method for controlling air conditioner to defrost automatically and continuously without reversing
CN113339976A (en) * 2021-06-17 2021-09-03 中洁环境科技(西安)集团有限公司 Control method and device for electric heating switch of full-quality air conditioner and full-quality air conditioner

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2271676Y (en) * 1995-12-25 1997-12-31 杨克友 Air cooling heat pump of selecting good working state according to the external temp conditions
CN1104605C (en) * 2000-06-02 2003-04-02 海尔集团公司 Improved refrigerating system for one driving multiple-unit air conditioner
CN2750259Y (en) * 2004-12-03 2006-01-04 广东美的电器股份有限公司 Low-temperature heat-production air conditioner

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331121A (en) * 2011-08-10 2012-01-25 Tcl空调器(中山)有限公司 Air conditioner and control method thereof
CN102589218A (en) * 2011-11-30 2012-07-18 青岛海尔空调电子有限公司 Method for monitoring detachment of exhaust temperature sensor of air conditioning compressor
CN102589218B (en) * 2011-11-30 2014-08-06 青岛海尔空调电子有限公司 Method for monitoring detachment of exhaust temperature sensor of air conditioning compressor
CN103424211A (en) * 2012-05-17 2013-12-04 珠海格力电器股份有限公司 Method and device for detecting thermal bulb of compressor and outdoor unit
CN104879973A (en) * 2015-04-29 2015-09-02 广东美的制冷设备有限公司 Air conditioning system and method for controlling air conditioner to defrost automatically and continuously without reversing
CN104791969A (en) * 2015-04-30 2015-07-22 广东美的制冷设备有限公司 Temperature compensation device and air-conditioner
CN104791969B (en) * 2015-04-30 2017-10-13 广东美的制冷设备有限公司 Temperature compensation means and air conditioner
CN113339976A (en) * 2021-06-17 2021-09-03 中洁环境科技(西安)集团有限公司 Control method and device for electric heating switch of full-quality air conditioner and full-quality air conditioner

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