CN101603701B - Auxiliary heating method of air conditioner with auxiliary heating device - Google Patents
Auxiliary heating method of air conditioner with auxiliary heating device Download PDFInfo
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- CN101603701B CN101603701B CN200810028848XA CN200810028848A CN101603701B CN 101603701 B CN101603701 B CN 101603701B CN 200810028848X A CN200810028848X A CN 200810028848XA CN 200810028848 A CN200810028848 A CN 200810028848A CN 101603701 B CN101603701 B CN 101603701B
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Abstract
The invention discloses an air conditioner with an auxiliary heating device and an auxiliary heating method thereof. The air conditioner comprises a central control unit, a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a magnetic valve, wherein the four-way valve is configured among the compressor, the outdoor heat exchanger and the indoor heat exchanger to switch a refrigerant path; and the magnetic valve is connected between the output end of the compressor and the input end of the indoor heat exchanger. The auxiliary heating device comprises a temperature sensor, a comparator and a valve controller, wherein the temperature sensor is used for detecting the air exhaust temperature of the compressor and the surface temperature of the indoor heat exchanger; the comparator is used for comparing the detected air exhaust temperature of the compressor and the surface temperature of the indoor heat exchanger with set temperature so as to generate and output a comparing signal; and the valve controller is used for controlling the magnetic valve to be opened when the signal is met so as to realize auxiliary heating and for controlling the magnetic valve to be closed when the signal is not met. The air conditioner can improve the heating efficiency, lead an air conditioning system to be difficult to frost and ensure the stability of the heating running of the air conditioner.
Description
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.
Advantages such as parallel-flow heat exchanger is an all-aluminium construction, and it is low to have a cost, and heat exchange efficiency is high, and 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 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 that the present invention will solve is; Through 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; Said air-conditioner comprises: central control unit, compressor, indoor heat exchanger, outdoor parallel-flow 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 output and indoor heat exchanger of compressor; It is characterized in that: said 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 in order to the compressor exhaust temperature that is detected and outdoor parallel-flow heat exchanger surface temperature and design temperature are made comparisons, 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 got into 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, get into 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 said 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 gets into steps A.
As the further improvement of said method, further comprising the steps of between said 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 gets into 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, and can in needs, in time defrost again simultaneously, therefore can reduce high frequent and start; The stability that can keep air-conditioning heating effect and heating operation, energy savings.
Description of drawings
Fig. 1 is the refrigeration system sketch map of the auxiliary heating combined equipment of band;
Fig. 2 is the heating operation sketch map of the air-conditioner of band servicing unit;
Fig. 3 is auxiliary the heat sketch map of air-conditioner when heating operation of band servicing unit;
The auxiliary control flow chart that heats of Fig. 4.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further specified.
At first need improve in the present embodiment traditional room air conditioner system.Room air conditioner system after the improvement is 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: shown in accompanying drawing 2; Compressor 1 operation; The gas refrigerant of discharging HTHP is behind cross valve 2, and the liquid refrigerant of warm high pressure in indoor heat exchanger 7 is condensed into again is 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 get into the circulation that heats of a new round.
The flow process of the auxiliary heating operation of air-conditioning system is: shown in accompanying drawing 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, and 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; The gas refrigerant of second portion HTHP parallel-flow heat exchanger 4 outside the inlet chamber again after the liquid refrigerant that the magnetic valve 3 opened has 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 get into 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 following:
Shown in accompanying drawing 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 gets into 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 at a distance from 20 seconds and satisfy TA≤T1 for 3 times and carry out the 3rd and go on foot continuously.
Step 3 judges whether parallel-flow heat exchanger 4 surface temperature TA are to satisfy for the first time whenever to satisfy TA≤T1 at a distance from 20 seconds and continuous 3 times.If for the first time, then carry out Defrost operation.Whenever satisfied TA≤T1 if satisfy for the second time, then carry out next step control at a distance from 20 seconds and continuous 3 times.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 whenever satisfying TA≤T1 at a distance from 20 seconds and continuous 3 times, then carries out Defrost operation.
If step 4 is to detect compressor exhaust temperature TB by sensor 8 can not continue to satisfy TB >=T2 (55 ℃), show the poor 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.
Wherein: step 1 to step 2 is normal heating operations of air-conditioning.Air-conditioning gets into 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 ability 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 at a distance from 20 seconds and satisfy TA≤T1 for 3 times and carry out the 3rd and go on foot 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.The purpose of control 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.Whenever satisfied TA≤T1 if satisfy for the second time, then carry out the control in the 4th step at a distance from 20 seconds and continuous 3 times.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 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 under ultralow temperature, heating, just can occur.If compressor exhaust temperature TB continues to satisfy TB >=T2, show that air-conditioning can carry out auxiliary heating operation.
Because the method for Defrost operation control has a lot; Mention the entering Defrost operation in this patent control method; Can adopt conventional, general Defrost technology to realize, say simply, promptly be to change heating operation refrigerating operaton into and recover 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 (6)
1. an air-conditioner is assisted heat-production control method; This air-conditioner comprises central control unit, compressor, indoor heat exchanger, outdoor parallel-flow heat exchanger, be configured between the input of the cross valve, the output that is connected compressor and the indoor heat exchanger that switch refrigerant path between compressor and outdoor and the indoor heat converter magnetic valve and mainly by in order to the temperature sensor of the surface temperature of the delivery temperature that detects compressor and outdoor parallel-flow heat exchanger, in order to the compressor exhaust temperature that is detected and outdoor parallel-flow heat exchanger surface temperature are made comparisons with design temperature and produce the output comparison signal comparator, open realization in order to control valve opening solenoid when signal satisfies and assist and heat, do not satisfy the auxiliary heating combined equipment that the valve positioner of time control system closed electromagnetic valve is formed at signal; It is characterized in that: be preset with design temperature T1, T2, T3 in the air-conditioner; T1＜T3＜T2 wherein; When air-conditioner got into 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, get into 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.
2. air-conditioner according to claim 1 is assisted heat-production control method, it is characterized in that, and is further comprising the steps of before the said 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 gets into steps A.
3. air-conditioner according to claim 1 is assisted heat-production control method, it is characterized in that said T1=0 ℃.
4. according to claim 1 or the auxiliary heat-production control method of 2 or 3 described air-conditioners, it is characterized in that, further comprising the steps of between said 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 gets into step e.
5. air-conditioner according to claim 1 is assisted heat-production control method, it is characterized in that said steps A is: every when for the first time at a distance from 20 seconds and continuous when satisfying evaporimeter temperature TA≤design temperature T1 for 3 times, and air-conditioner execution Defrost operation.
6. according to claim 1 or the auxiliary heat-production control method of 5 described air-conditioners; It is characterized in that; Said step B is: when again whenever at a distance from 20 seconds and continuous when satisfying evaporimeter temperature TA≤design temperature T1 for 3 times; Relatively compressor exhaust temperature TB and design temperature T2, when TB＜T2, air-conditioner execution Defrost operation; When TB>=T2, carry out next step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810028848XA CN101603701B (en) | 2008-06-13 | 2008-06-13 | Auxiliary heating method of air conditioner with auxiliary heating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810028848XA CN101603701B (en) | 2008-06-13 | 2008-06-13 | Auxiliary heating method of air conditioner with auxiliary heating device |
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| CN101603701A CN101603701A (en) | 2009-12-16 |
| CN101603701B true CN101603701B (en) | 2012-12-19 |
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| CN200810028848XA Expired - Fee Related CN101603701B (en) | 2008-06-13 | 2008-06-13 | Auxiliary heating method of air conditioner with auxiliary heating device |
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Families Citing this family (6)
| 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 |
| 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 |
| CN103424211B (en) * | 2012-05-17 | 2016-04-20 | 珠海格力电器股份有限公司 | The detection method of compressor temperature-sensitive bag and pick-up unit and off-premises station |
| 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 |
| 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 |
Citations (3)
| 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 |
| CN1275700A (en) * | 2000-06-02 | 2000-12-06 | 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 |
-
2008
- 2008-06-13 CN CN200810028848XA patent/CN101603701B/en not_active Expired - Fee Related
Patent Citations (3)
| 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 |
| CN1275700A (en) * | 2000-06-02 | 2000-12-06 | 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 |
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| CN101603701A (en) | 2009-12-16 |
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