CN102589083B - Defrosting control method for multi-system air conditioning equipment - Google Patents
Defrosting control method for multi-system air conditioning equipment Download PDFInfo
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- CN102589083B CN102589083B CN201110008991.4A CN201110008991A CN102589083B CN 102589083 B CN102589083 B CN 102589083B CN 201110008991 A CN201110008991 A CN 201110008991A CN 102589083 B CN102589083 B CN 102589083B
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Abstract
The invention provides a defrosting control method for multi-system air conditioning equipment, which avoids the problem that existing air conditioning equipment cannot run accurately due to the fact that time for various systems to meet defrosting completion conditions is inconsistent, defrosting is carried out again mistakenly for a system which meets the defrosting completion conditions at first after the system is restarted and low-pressure protection for the system is started. Each of a system A and a system B of the air conditioning equipment consists of a compressor, a four-way valve, a heat exchanger, a fan and a controller, and each compressor, the corresponding four-way valve and the corresponding heat exchanger are connected by circulating pipelines. The defrosting control method includes steps that in a step S1, a controller judges that the system A meets defrosting completion conditions while the system B does not meet the defrosting completion conditions; in a step S2, the four-way valve of the system A is reversed, a defrosting completion position is set, and the system B continues running in a defrosting mode; in a step S3, defrosting of the system B is completed, and the defrosting completion conditions are met; in a step S4, the four-way valve of the system B is reversed, and the air conditioning equipment is changed to run for heating; and in a step S5, fans of both the system A and the system B are started.
Description
Technical field
The invention belongs to the control technology field of multisystem air conditioner equipment, relate in particular to a kind of defrosting control method of multisystem air conditioner equipment.
Background technology
Defrost is the very common a kind of technology in the control technology field of air-conditioning equipment, comprises that defrost starts, the setting of defrost termination condition and control method.But in the defrosting control method of existing shared blower fan multisystem air conditioner equipment, there is a defect: in defrost logic; when a system (system A) defrost complete; reach defrost end temp condition; and another one system (system B) does not also reach while defrosting termination condition; this system (system A) cross valve commutation (being that cross valve powers on) shutdown are waited for; but until another system (system B) defrost is when complete, system A is just allowed to enter and heats.At system A, shut down in the process of waiting for, because environment temperature is lower, the defrost temperature-sensitive bag temperature of system A declines; when system B defrost is complete; system A defrost temperature-sensitive bag temperature probably reaches again defrost and starts condition, and due to defrost complement mark not being set, system is thought system A by mistake, and defrost is not complete; after unit is started shooting again; system is thought defrost again, and at this moment cross valve powers on, but blower fan does not leave; there is low-voltage variation state in system, causes thus the air-conditioning equipment cannot true(-)running.
Summary of the invention
The object of the present invention is to provide a kind of defrosting control method of multisystem air conditioner equipment; avoid each system of unit owing to reaching defrosting termination condition Time Inconsistency; and after producing the system first reach defrosting termination condition and again starting shooting; think defrost again by mistake, that system starts low-voltage variation and cause the air-conditioning equipment cannot true(-)running problem.
The present invention is achieved through the following technical solutions:
The defrosting control method of multisystem air conditioner equipment, described air-conditioning equipment at least includes system A and system B, system A and system B have included compressor, cross valve, throttling arrangement, heat exchanger, blower fan and controller, and compressor, cross valve, throttling arrangement and heat exchanger are connected by circulation line; It is characterized in that: described defrosting control method comprises the steps
S1: controller judgement system A reaches defrost termination condition, and system B does not meet defrost termination condition;
The cross valve commutation of S2: system A, arranges defrost stop bits, and system B continues defrost mode operation;
S3: system B defrost is complete, reaches defrost termination condition;
The cross valve commutation of S4: system B, air-conditioning equipment proceeds to heating operation;
The blower fan of S5: system A and system B is all opened.
Beneficial effect of the present invention is as follows:
The defrosting control method of multisystem air conditioner equipment of the present invention, when each system all meets defrost termination condition, due to defrost stop bits being set, even if the temperature that one of them system defrost temperature-sensitive bag is experienced has reached again defrost and has started temperature, but owing to not meeting the compressor condition of accumulated running time, so can not repeat defrost, but unit directly turns heating operation, blower fan and cross valve are opened.This technology can make unit performance more reliable, can avoid: after defrost, this system-down waits for that complete the entering of another system defrost heats; after shutdown; unit defrost temperature-sensitive bag temperature declines, and due to defrost complement mark not being set, system is thought this unit by mistake, and defrost is not complete; after unit is started shooting again; system is thought defrost again, and at this moment cross valve powers on, but blower fan does not leave; system starts low-voltage variation, causes thus the situation that air-conditioning equipment cannot true(-)running to occur.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the defrosting control method of multisystem air conditioner equipment of the present invention;
Fig. 2 is the air-conditioning equipment structural representation of the defrosting control method of multisystem air conditioner equipment of the present invention.
The specific embodiment
Ask for an interview Fig. 1 to Fig. 2, the invention discloses a kind of defrosting control method of dual system air-conditioning equipment, described air-conditioning equipment includes system A and system B, system A and system B have included compressor 1, cross valve 5, First Heat Exchanger 21 and the second heat exchanger 22, throttling arrangement 3, blower fan 4 and controller, compressor 1, cross valve 5, throttling arrangement 3 are connected by circulation line with heat exchanger, system A and system B share the second heat exchanger 22, the second heat exchanger 22 is provided with water inlet 22a and water outlet device 22b, and First Heat Exchanger 21 is air cooling heat exchanger, it has water machine 4.When unit carries out heating operation, First Heat Exchanger 21 likely produces frost, need to carry out First Heat Exchanger 21 to carry out defrost; Wherein, described defrosting control method comprises the steps:
S1: controller judgement system A reaches defrost termination condition, and system B does not meet defrost termination condition;
The cross valve commutation of S2: system A, arranges defrost stop bits, and system B continues defrost mode operation;
S3: system B defrost is complete, reaches defrost termination condition;
The cross valve commutation of S4: system B, air-conditioning equipment proceeds to heating operation;
The blower fan of S5: system A and system B is all opened.
Described defrosting control method also comprises the steps:
S6: controller judgement system A or system B one reach defrost while starting condition, and the blower fan of system A and system B is all out of service;
S7: system A and system B all enter defrost operational mode.
In step S1, S3, the Rule of judgment of defrost termination condition is:
Defrost temperature-sensitive bag temperature reaches defrost end temp, and the accumulative total defrost time reaches lasting defrost setup times.
In step S2, the method that defrost stop bits is set is as follows:
To controller, send information, make compressor accumulated running time zero clearing.
In step S6, the Rule of judgment that defrost starts condition is:
Defrost temperature-sensitive bag temperature reaches that defrost starts temperature and compressor accumulated running time reaches the stipulated time.
Multisystem air conditioner equipment, for example, go up the two blower fan systems of air-out, and two blower fans are with opening with stopping.Only have two systems all to change frost (all reaching defrost termination condition), blower fan could be opened; When arbitrary system reaches defrost and starts condition defrost, two blower fans are with regard to stall, and another system also enters defrost.
Technical scheme common explain of the present invention is: system A reaches defrost termination condition; and another one system (system B) does not also reach while defrosting termination condition; this system (system A) cross valve commutation (being that cross valve powers on) shutdown are waited for; and defrost stop bits is set; until another system (system B) defrost is when complete, system A just enters and heats.Due to defrost stop bits being set, even if the temperature that system A defrost temperature-sensitive bag is experienced has reached again defrost, start condition, but also do not repeat defrost.But unit directly turns heating operation, blower fan and cross valve are opened.
Above-mentioned listed specific implementation is nonrestrictive, to one skilled in the art, is not departing from the scope of the invention, and the various modifications and variations of carrying out, all belong to protection scope of the present invention.
Claims (4)
1. the defrosting control method of multisystem air conditioner equipment, described air-conditioning equipment at least includes system A and system B, system A and system B have included compressor, cross valve, throttling arrangement, heat exchanger, blower fan and controller, and compressor, cross valve, throttling arrangement and heat exchanger are connected by circulation line; It is characterized in that: described defrosting control method comprises the steps:
S1: controller judgement system A reaches defrost termination condition, and system B does not meet defrost termination condition;
The cross valve commutation of S2: system A, arranges defrost stop bits, and system B continues defrost mode operation;
S3: system B defrost is complete, reaches defrost termination condition;
The cross valve commutation of S4: system B, air-conditioning equipment proceeds to heating operation;
The blower fan of S5: system A and system B is all opened;
In step S2, the method that defrost stop bits is set is as follows: to controller, send information, make compressor accumulated running time zero clearing.
2. the defrosting control method of multisystem air conditioner equipment as claimed in claim 1, is characterized in that: described defrosting control method also comprises the steps:
S6: controller judgement system A or system B one reach defrost while starting condition, and the blower fan of system A and system B is all out of service;
S7: system A and system B all enter defrost operational mode.
3. the defrosting control method of multisystem air conditioner equipment as claimed in claim 2, it is characterized in that: in step S1, S3, the Rule of judgment of defrost termination condition is: defrost temperature-sensitive bag temperature reaches defrost end temp, and the accumulative total defrost time reaches lasting defrost setup times.
4. the defrosting control method of multisystem air conditioner equipment as claimed in claim 2, it is characterized in that: in step S6, the Rule of judgment that defrost starts condition is: defrost temperature-sensitive bag temperature reaches that defrost starts temperature and compressor accumulated running time reaches the stipulated time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110008991.4A CN102589083B (en) | 2011-01-17 | 2011-01-17 | Defrosting control method for multi-system air conditioning equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110008991.4A CN102589083B (en) | 2011-01-17 | 2011-01-17 | Defrosting control method for multi-system air conditioning equipment |
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| CN102589083A CN102589083A (en) | 2012-07-18 |
| CN102589083B true CN102589083B (en) | 2014-03-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104180570A (en) * | 2014-07-30 | 2014-12-03 | 珠海格力电器股份有限公司 | Defrosting control method and system of heat pump air-conditioning unit |
| CN106476565B (en) * | 2016-10-25 | 2019-03-26 | 珠海格力电器股份有限公司 | A kind of heat pump air conditioner unit, its control method and electric motor coach |
Citations (4)
| 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 |
| KR20020032071A (en) * | 2000-10-25 | 2002-05-03 | 구자홍 | A defroster and control method for the heat pump type air-conditioner |
| CN2524181Y (en) * | 2001-12-20 | 2002-12-04 | 浙江盾安三尚机电有限公司杭州中央空调研究所 | Multiple system blowing pipe style heat pump defroster |
| CN101832644A (en) * | 2010-05-31 | 2010-09-15 | 宁波海诚电器有限公司 | Air energy water heater and defrosting method thereof |
-
2011
- 2011-01-17 CN CN201110008991.4A patent/CN102589083B/en active Active
Patent Citations (4)
| 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 |
| KR20020032071A (en) * | 2000-10-25 | 2002-05-03 | 구자홍 | A defroster and control method for the heat pump type air-conditioner |
| CN2524181Y (en) * | 2001-12-20 | 2002-12-04 | 浙江盾安三尚机电有限公司杭州中央空调研究所 | Multiple system blowing pipe style heat pump defroster |
| CN101832644A (en) * | 2010-05-31 | 2010-09-15 | 宁波海诚电器有限公司 | Air energy water heater and defrosting method thereof |
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| CN102589083A (en) | 2012-07-18 |
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