CN101865510A - Defrost control method for air conditioner and application thereof - Google Patents
Defrost control method for air conditioner and application thereof Download PDFInfo
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- CN101865510A CN101865510A CN 201010190153 CN201010190153A CN101865510A CN 101865510 A CN101865510 A CN 101865510A CN 201010190153 CN201010190153 CN 201010190153 CN 201010190153 A CN201010190153 A CN 201010190153A CN 101865510 A CN101865510 A CN 101865510A
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Abstract
The invention discloses a defrost control method for an air conditioner and an application thereof. The defrost control method comprises the following steps: utilizing a temperature sensor for the indoor heat exchanger of the air conditioner to detect the temperature of the indoor heat exchanger; utilizing a main controller to receive and analyze detected data and then output an instruction; and controlling the defrosting procedure to be finished. By utilizing the temperature sensor to monitor the temperature of the indoor heat exchanger and combining the corresponding relationship between the temperature of the indoor heat exchanger and the temperature of an outdoor heat exchanger and the frost quantity, the invention achieves the purpose of enabling the air conditioner to finish intelligent defrosting without being influenced by the outdoor temperature; the frost can be clearly removed, and the heating capacity is not influenced; the air conditioner is enabled to omit a temperature sensor for the outdoor heat exchanger and relevant signal wires; and the material cost, the installation cost and the maintenance cost are lowered.
Description
Technical field
The present invention relates to field of air conditioning, particularly a kind of defrosting control method of air-conditioner and application thereof.
Background technology
As shown in Figure 1, in the detachable air conditioner refrigerating circuit of prior art, comprise compressor 1, cross valve 2, the indoor heat converter 4 of indoor heat-exchanger temperature sensor 3 is arranged, throttle capillary tube 5, the outdoor heat converter 6 of outdoor heat converter temperature sensor 7 etc. is arranged.The defrosting control method of existing air-conditioner, general as disclosed among the Chinese patent ZL200510117144.6: during defrosting, the outdoor heat converter temperature is along with outdoor defrosting raises gradually, detection by outdoor heat converter temperature sensor 7, when raising, the outdoor heat converter temperature reaches a certain temperature, or begin to count through setting-up time from defrosting, judge that promptly the off-premises station defrosting is complete, finish defrosting.
But this technology has the following disadvantages:
If 1. outdoor environment temperature itself is very low, influence the heat exchange effect of cooling operation in the defrost process, and influence the induction of sensor, the end signal that causes defrosting can't satisfy always, can only finish defrosting according to the longest defrosting time of setting;
2. judge that according to the outdoor heat converter temperature defrosting finishes, need external signal line in the associated chamber, and the electronic loop design etc., the cost height, number is long.
Summary of the invention
For addressing the above problem, the purpose of this invention is to provide a kind of defrosting control method of air-conditioner, it can not only guarantee that defrosting is clean, does not influence heating efficiency, and has simplified circuit structure, cost reduces.
Another object of the present invention provides a kind of air-conditioner of using above-mentioned defrosting control method.
The object of the present invention is achieved like this: a kind of defrosting control method of air-conditioner, it is characterized in that: after the defrosting beginning, detect by the temperature of heat-exchanger temperature sensor in the air conditioner chamber indoor heat converter, master controller receives these detection data back output order by analysis, control defrosting EP (end of program).
Described control flow may further comprise the steps: the record defrosting is t constantly, behind a setting-up time N, the indoor heat converter temperature sensor is every indoor heat converter temperature of blanking time M1 detection, and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn, indoor heat converter minimum temperature point Tmin in the recording process, and the corresponding t ' constantly of Tmin; Master controller is counted from the moment t ' that obtains indoor heat converter minimum temperature point Tmin, through a setting-up time M2, again through a revisal time T d, sends and withdraws from the defrosting instruction.Perhaps, the record defrosting is t constantly, the indoor heat converter temperature sensor is every indoor heat converter temperature of blanking time M1 detection, and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn, indoor heat converter minimum temperature point Tmin in the recording process, and the corresponding t ' constantly of Tmin; Master controller receives a certain moment t
N+mIndoor heat converter temperature T n+m be higher than one when setting temperature difference X than Tmin, again through a revisal time T d, send and withdrawing from the defrosting instruction.
The described revisal time T d time is the moment t ' and the time difference Δ t decision that enters defrosting moment t according to indoor heat converter minimum temperature point Tmin, and the time difference, Δ t was big more, and revisal time T d is long more.
Air-conditioner defrosting control method of the present invention, air-conditioner is according to the temperature sensor of indoor heat converter sensor in the defrost process, corresponding relation in conjunction with indoor heat converter temperature and outdoor heat converter temperature and frosting degree existence, analyze relatively series of factors, for example lowest temperature and the current indoor heat converter temperature difference that detects, and the time that begins to defrost etc., judge outdoor residual frost how much, and then whether decision satisfy the condition that defrosting ends, and reaches to need not the outdoor heat converter temperature sensor and defrost to end and judge.The present invention can reach air-conditioning and carry out the purpose that intelligence finishes defrosting, be not subjected to the influence of outdoor temperature, and defrosting is clean, does not influence heating capacity, and making air-conditioner be saved outdoor heat converter temperature sensor and coherent signal line, material cost and installation, maintenance cost descend.
Description of drawings
Fig. 1 is the refrigerating circuit schematic diagram of prior art air-conditioner;
Fig. 2 is the refrigerating circuit schematic diagram of air-conditioner of the present invention;
Fig. 3 is a defrosting control method flow chart of the present invention;
Fig. 4 is the temperature changing curve diagram of indoor and outdoor heat exchanger in the defrost process.
The specific embodiment
The present invention is the control that realizes defrosting and finish by heat-exchanger temperature sensor in the sensing chamber, below in conjunction with accompanying drawing the present invention is further described, but the present invention is not limited to this specific examples.
As shown in Figure 2, in the refrigerating circuit of detachable air conditioner of the present invention, comprise compressor 1 (containing compressor liquid storage device), cross valve 2, indoor and outdoor connecting pipings, the indoor heat converter 4 of indoor heat-exchanger temperature sensor 3 is arranged, throttle capillary tube 5, not with the outdoor heat converter 6 of temperature sensor, other auxiliary connecting pipings etc.Owing to be to control defrosting according to indoor heat converter 4 temperature to finish, therefore need not temperature sensor to be set at outdoor heat converter 6.The refrigerating circuit associative cell in entering defrost process, the operation of compressor 1, cross valve 2, outdoor fan, indoor fan must guarantee in defrost process, cross valve 2 commutations, indoor no cold wind blows.
Defrosting control method of the present invention is: after the defrosting beginning, temperature by 3 pairs of indoor heat converters 4 of heat-exchanger temperature sensor in the air conditioner chamber detects, air-conditioning master controller (as the IC chip) receives these detection data back output order by analysis, control defrosting EP (end of program).
Control flow is as shown in Figure 3:
Start the defrosting program, the record defrosting is t constantly;
Behind a setting-up time N, 3 beginnings of indoor heat converter temperature sensor detect indoor heat converter 4 temperature every a fixed interval M1, and send a signal to master controller, are designated as T1, T2, T3 respectively ... Tn;
Heat exchanger temperature Tn when detected indoor heat converter 4 temperature of continuous several are all put greater than certain, then this Tn is registered as indoor heat converter 4 minimum temperature point Tmin, writes down the corresponding t ' constantly of Tmin simultaneously;
Master controller is counted from the moment t ' that obtains indoor heat converter 4 minimum temperature point Tmin, through a setting-up time M2, again through a revisal time T d, sends and withdraws from the defrosting instruction; The indoor heat converter temperature T n+m that perhaps detects a certain moment tn+m is higher than one when setting temperature difference X than Tmin, again through a revisal time T d, sends and withdrawing from the defrosting instruction; More than two kinds of programs be parallel Rule of judgment, as long as a condition is set up, all enter the defrosting phase run;
The defrosting program is provided with the longest defrosting time Z, begins through the Z time from defrosting, even all finish defrosting by above-mentioned two kinds of programs, master controller still sends and withdrawing from the defrosting instruction, and is former thereby cause the situation that defrosts and end of can't judging whether because of some to prevent.
Above-mentioned revisal time T d is the moment t ' and the time difference Δ t decision that enters defrosting moment t according to indoor heat converter minimum temperature point Tmin, and the time difference, Δ t was big more, and revisal time T d is long more.Revisal time T d is divided into two more than the rank by time difference Δ t.Be divided into four ranks in the present embodiment according to actual needs, if Δ t＜G1 timesharing, Td is made as Y1; If G1≤Δ t＜G2 timesharing, Td is made as Y2; If G2≤Δ t＜G3 timesharing, Td is made as Y3; If during G3≤Δ t, Td is made as Y4; But defrosting time is no longer than the Z branch.As shown in table 1.
The corresponding relation of table 1. time difference Δ t and revisal time T d
| Δ t (minute) | Td (second) |
| ??Δt＜3 | ??0 |
| ??3≤Δt＜5 | ??30 |
| ??5≤Δt＜7 | ??60 |
| ??Δt≥7 | ??90 |
As shown in Figure 4, indoor heat converter temperature (block curve) has corresponding relation with outdoor heat converter temperature (dashed curve) in the defrost process, according to the indoor heat converter temperature variation curve each critical parameter is set:
1. begin heat exchanger temperature in the sensing chamber after entering defrosting program process setting-up time N, this setting-up time N must cause the small size moment of rising of indoor heat converter temperature greater than changing because of air quantity, as Fig. 4 point A moment.
2. every blanking time M detect an indoor heat converter temperature, the minimum detectable time that this blanking time, M must be determined more than or equal to the indoor heat converter sensor characteristics.
3. according to each type, and the difference of each type refrigerating circuit, judge that Tn+m is greater than Tmin X degree, this temperature difference X value may be different because of each machine, the Td value also can be different and different according to machine, but this X, Td be worth to be provided with, and must satisfy the defrosting time that calculates smaller or equal to maximum defrosting time Z value.
4. according to a kind of operation logic of refrigerating circuit of air-conditioner, the defrosting time compensating value must satisfy Y1≤Y2≤Y3≤Y4.
Start the defrosting program, the record defrosting is t constantly.
Behind a setting-up time N (N is set at 2 minutes), the indoor heat converter temperature sensor begins to detect an indoor heat converter temperature every a fixed interval M1 (M1 is set at 10 seconds), and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn.
Heat exchanger temperature Tn when continuous 3 detected indoor heat converter Wen Jun put greater than certain, then this Tn is registered as indoor heat converter minimum temperature point Tmin, writes down the corresponding t ' constantly of Tmin simultaneously.
Master controller is counted from the moment t ' that obtains indoor heat converter minimum temperature point Tmin, through a setting-up time M2 (M2 is set at 70 seconds), again through a revisal time T d, sends and withdraws from the defrosting instruction.
Get indoor heat converter temperature minimum point Tmin when supposing to enter defrosting back 4.5 minutes (t '-t value), press shown in the table 1, Td is 30 seconds, so the whole defrost process time is 4.5 minutes+70 seconds+30 seconds=6 minutes and 10 seconds.
Start the defrosting program, the record defrosting is t constantly.
Behind a setting-up time N (N is set at 2.5 minutes), the indoor heat converter temperature sensor begins to detect an indoor heat converter temperature every a fixed interval M1 (M1 is set at 10 seconds), and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn.
Heat exchanger temperature Tn when continuous 3 detected indoor heat converter Wen Jun put greater than certain, then this Tn is registered as indoor heat converter minimum temperature point Tmin, writes down the corresponding t ' constantly of Tmin simultaneously.
The indoor heat converter temperature T n+m that detects a certain moment tn+m is higher than one when setting temperature difference X (X is set at 3 ℃) than Tmin, again through a revisal time T d, sends and withdrawing from the defrosting instruction.
Get indoor heat converter temperature minimum point Tmin when supposing to enter in the present embodiment defrosting back 5.5 minutes (t '-t value), again through detecting indoor heat converter temperature T n+m-Tmin＞3 ℃ in 90 seconds, press shown in the table 1, Td is 60 seconds, and the promptly whole defrost process time is 5.5 minutes+90 seconds+60 seconds=8 minutes.
Start the defrosting program, the record defrosting is t constantly.
Behind a setting-up time N (N is set at 2.5 minutes), the indoor heat converter temperature sensor begins to detect an indoor heat converter temperature every a fixed interval M1 (M1 is set at 10 seconds), and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn.
Heat exchanger temperature Tn when continuous 3 detected indoor heat converter Wen Jun put greater than certain, then this Tn is registered as indoor heat converter minimum temperature point Tmin, writes down the corresponding t ' constantly of Tmin simultaneously.
The indoor heat converter temperature T n+m that detects a certain moment tn+m is higher than one when setting temperature difference X (X is set at 3 ℃) than Tmin, again through a revisal time T d, get indoor heat converter temperature minimum point Tmin when supposing to enter in the present embodiment defrosting back 8 minutes (t '-t value), again through detecting indoor heat converter temperature T n+m-Tmin＞3 ℃ 2 minute second, press shown in the table 1, Td is 90 seconds, be to be 8 minutes+2 minutes+90 seconds=11 minutes 30 seconds the whole defrost process time, the longest defrosting time Z that sets greater than this machine is 11 minutes, so master controller can send the instruction that finishes defrosting automatically after the defrosting moment, t started at through 11 minutes.
Claims (10)
1. the defrosting control method of an air-conditioner, it is characterized in that: after the defrosting beginning, detect by the temperature of heat-exchanger temperature sensor in the air conditioner chamber to indoor heat converter, master controller receives these detection data back output order by analysis, control defrosting EP (end of program).
2. the defrosting control method of air-conditioner according to claim 1, its feature may further comprise the steps: the record defrosting is t constantly; Behind a setting-up time N, the indoor heat converter temperature sensor is every indoor heat converter temperature of blanking time M1 detection, and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn, indoor heat converter minimum temperature point Tmin in the recording process, and the corresponding t ' constantly of Tmin; Master controller is counted from the moment t ' that obtains indoor heat converter minimum temperature point Tmin, through a setting-up time M2, again through a revisal time T d, sends and withdraws from the defrosting instruction.
3. the defrosting control method of air-conditioner according to claim 1, its feature may further comprise the steps: the record defrosting is t constantly; The indoor heat converter temperature sensor is every indoor heat converter temperature of blanking time M1 detection, and send a signal to master controller, be designated as T1, T2, T3 respectively ... Tn, the indoor heat converter minimum temperature point Tmin in the recording process, and the corresponding t ' constantly of Tmin; Master controller receives a certain moment t
N+mIndoor heat converter temperature T n+m be higher than one when setting temperature difference X than Tmin, again through a revisal time T d, send and withdrawing from the defrosting instruction.
4. according to the defrosting control method of claim 2 or 3 described air-conditioners, it is characterized in that: the described revisal time T d time is the moment t ' and the time difference Δ t decision that enters defrosting moment t according to indoor heat converter minimum temperature point Tmin, time difference, Δ t was big more, and revisal time T d is long more.
5. the defrosting control method of air-conditioner according to claim 4, it is characterized in that: described revisal time T d is divided into two more than the rank by time difference Δ t.
6. according to the defrosting control method of claim 2 or 3 described air-conditioners, it is characterized in that: described minimum temperature point Tmin is the heat exchanger temperature when detected indoor heat converter temperature is all greater than this for several times continuously.
7. according to the defrosting control method of claim 2 or 3 described air-conditioners, it is characterized in that: described defrosting program is provided with the longest defrosting time Z, begins through Z after the time from defrosting, and master controller sends and withdraws from the defrosting instruction.
8. according to the defrosting control method of claim 2 or 3 described air-conditioners, it is characterized in that: described setting-up time N is greater than change the moment that causes the indoor heat converter temperature slightly to rise because of air quantity.
9. application rights requires the air-conditioner that the described defrosting control method of arbitrary claim defrosts and controls among the 1-3.
10. air-conditioner according to claim 9 is characterized in that comprising: the indoor heat converter that has the indoor heat converter temperature sensor; Not with the outdoor heat converter of temperature sensor; Master controller is according to the detection Data Control defrosting EP (end of program) of indoor heat converter temperature sensor.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307705A (en) * | 2013-06-27 | 2013-09-18 | Tcl空调器(中山)有限公司 | Method and device for controlling air conditioner to be defrosted |
| CN103940036A (en) * | 2014-03-31 | 2014-07-23 | 广东美的集团芜湖制冷设备有限公司 | Method for controlling defrosting of air conditioner |
| CN104764171A (en) * | 2015-04-27 | 2015-07-08 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
| CN107179205A (en) * | 2017-06-07 | 2017-09-19 | 广东工业大学 | A kind of frosting cloud test method and system |
| CN109442679A (en) * | 2018-11-06 | 2019-03-08 | 广东美的制冷设备有限公司 | Control method, system and the air conditioner of air conditioner |
| CN110631183A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
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| CN1204029A (en) * | 1997-06-27 | 1999-01-06 | 三星电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN1508499A (en) * | 2002-12-16 | 2004-06-30 | 珠海格力电器股份有限公司 | Defrosting control method for heat pump type air conditioner |
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2010
- 2010-05-28 CN CN2010101901539A patent/CN101865510B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204029A (en) * | 1997-06-27 | 1999-01-06 | 三星电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN1508499A (en) * | 2002-12-16 | 2004-06-30 | 珠海格力电器股份有限公司 | Defrosting control method for heat pump type air conditioner |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307705A (en) * | 2013-06-27 | 2013-09-18 | Tcl空调器(中山)有限公司 | Method and device for controlling air conditioner to be defrosted |
| CN103940036A (en) * | 2014-03-31 | 2014-07-23 | 广东美的集团芜湖制冷设备有限公司 | Method for controlling defrosting of air conditioner |
| CN104764171A (en) * | 2015-04-27 | 2015-07-08 | 珠海格力电器股份有限公司 | Air conditioner and control method and device thereof |
| CN107179205A (en) * | 2017-06-07 | 2017-09-19 | 广东工业大学 | A kind of frosting cloud test method and system |
| CN110631183A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN110631183B (en) * | 2018-06-25 | 2022-04-19 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN109442679A (en) * | 2018-11-06 | 2019-03-08 | 广东美的制冷设备有限公司 | Control method, system and the air conditioner of air conditioner |
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| CN101865510B (en) | 2012-07-25 |
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