CN1959309A - Self-adapting type air conditioner capable of early-warning for high pressure, and control method - Google Patents
Self-adapting type air conditioner capable of early-warning for high pressure, and control method Download PDFInfo
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- CN1959309A CN1959309A CNA2006101236248A CN200610123624A CN1959309A CN 1959309 A CN1959309 A CN 1959309A CN A2006101236248 A CNA2006101236248 A CN A2006101236248A CN 200610123624 A CN200610123624 A CN 200610123624A CN 1959309 A CN1959309 A CN 1959309A
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Abstract
An air conditioner of self adaptive type with high pressure pre-alarm unit consists of refrigerating loop formed by compressor, indoor heat exchanger, master capillary tube, outdoor heat exchanger and piping; pre-alarm unit set on refrigerating loop and used for detecting pressure variation. It is featured as forming said pre-alarm unit by detection switch and control circuit for transmitting electric signal, electric-connecting its input end of said control circuit to pressure detection valve and outdoor end to control system of air conditioner.
Description
Technical field
The invention belongs to air regulator and make the field, particularly relate to air-conditioner or the similar refrigerating plant and the control method thereof of a kind of family expenses or commercial use.
Background technology
As shown in Figure 1, common in the market air-conditioner, refrigerating plant generally include compressor, indoor heat converter, outdoor heat converter and throttle part etc.Electric-control system comprises parts such as controller, sensor, control valve and fan electromotor.
In traditional air-conditioner refrigerating system, during refrigerating operaton, refrigerating plant by compressor work with heat from indoor transfer to outdoor.According to CNS GB/T7725 room type air regulator regulation, the declared working condition of air conditioner refrigerating operation is 35 ℃ of outside temperature, 27 ℃ of indoor temperature.But generally speaking, the actual environment for use condition of air-conditioner, all greater than the declared working condition condition of national Specification, the outside temperature is at 40 ℃ sometimes, even reaches more than 50 ℃.When moving under so abominable hot environment, the outside condensing pressure is very high, and delivery temperature improves rapidly, and compressor carries out overload operation, will cause the high frequent protection like this, can not continuous cooling; And when heating operation, equally can because under the hot environment during operation condensing pressure raise, and then have influence on the service property (quality) and the service life of air-conditioner.
In view of air-conditioner in the market, in control, can not predict because environmental change causes the pressure of kind of refrigeration cycle process to change, and can not carry out pre-alarm by certain means, can not can't make the continuous operate as normal of air-conditioner corresponding to accurately adjusting the control parameter under the different service conditions.And compressor usually burns because high temperature operation can not get normal cooling.The lasting raising of fault rate increases the after-sales service cost of enterprise greatly, has reduced the serviceability of air-conditioning product.
Summary of the invention
The problem to be solved in the present invention is to overcome the shortcoming of prior art, under hot conditions, can not adjust the control parameter at traditional air-conditioner, provide a kind of pressure to change by the monitoring system cooling system, judge the size of cooling load according to the pressure parameter of being gathered, carry out pre-alarm by certain means, and by control circuit transmission of electric signals adjustment control parameter, automatically regulate the air-conditioner and the control method thereof of condensation load, make air-conditioner under hot conditions, can normally realize freezing and heating purpose.
Technical scheme of the present invention is: a kind of air-conditioner, comprise the refrigerating circuit that is in series by pipeline by compressor, indoor heat converter, outdoor heat converter and main capillary, it is characterized in that: be provided with refrigeration system pressure variation monitoring prior-warning device in refrigerating circuit, described pressure changes the control circuit that prior-warning device comprises early-warning for high pressure switch and transmission of electric signals.Described control circuit compares according to early-warning for high pressure switch detected pressures and reference pressure value, and the control air-conditioner is reported to the police in advance, and enters adaptive control scheme.
The input of described control circuit is electrically connected with the pressure monitoring switch, and output is electrically connected with the control system of air-conditioner;
When described refrigeration system pressure change monitoring device was applied in the cold-warm type air-conditioning device, it was connected on the gas exhaust piping between compressor and the four-way change-over valve;
When described refrigeration system pressure change monitoring device was applied in the single cold type air-conditioner, it was connected between compressor and the condenser, or on the pipeline before the main capillary.
Described pressure monitoring switch can be the diaphragm type structure, is normal closed condition under the certain pressure value, opens when operation under the air-conditioner hot conditions causes pressure to be increased to another definite value, and links to each other with above-described pipeline;
Be provided with the sensor of feedback signal in the described pressure monitoring switch;
Described sensor is contacted mutually with control circuit;
Described control circuit comprise controller, the optocoupler that is electrically connected with its input, with the relay that its output is electrically connected, described optocoupler links to each other with sensor, described relay links to each other with controller.
Technical scheme of the present invention is that a kind of control method of air-conditioner comprises following step:
A) the pressure monitoring switch detects pressure at expulsion and is higher than safety limit;
B) sensor signal that is provided with feedback signal in the pressure monitoring switch is in time transferred to controller;
C) signals transmission is: controller carries out pre-alarm by master chip control air-conditioner, adopts form early warning such as demonstration or auditory tone cues;
D) controller is adjusted the control parameter by master chip;
E) when refrigerating operaton, adjustment control parameter is: reduce the indoor machine fan motor speed, reduce the pressure of condensation side;
F) when heating operation, adjustment control parameter is: reduce or stop the outdoor machine fan motor speed, reduce the pressure of condensation side;
G) reduce when the pressure monitoring switch monitors pressure, the transmission signal is to controller, and when the force value that controller detects was lower than the reference pressure value, controller cancellation early warning was adjusted into former operational mode automatically.
At above-mentioned steps e) in, controller also can reduce the pressure of condensation side by adopting the means of adjusting refrigeration system flows such as electric expansion valve;
At above-mentioned steps f) in, outdoorly can be the fan electromotor of single rotating speed (single-stage) or the fan electromotor of many rotating speeds (multistage);
At above-mentioned steps f) in, controller also can reduce the pressure of condensation side by adopting the means of adjusting refrigeration system flows such as electric expansion valve.
Air-conditioner and the control method thereof that has refrigeration system pressure variation monitoring prior-warning device provided by the invention, compared with prior art have the following advantages: by pressure monitoring switch detected pressures, know air-conditioner operating condition of living in, by the control circuit output signal, the control air-conditioner carries out pre-alarm, and the operational factor of regulating air-conditioner automatically, thereby control also changes indoor, the outdoor fan motor running speed, to reach the change condensation load, realize the high temperature refrigeration and heat purpose, and avoided under hot environment refrigeration and the problem of hypertonia when heating, thereby enlarged the temperature range of this air-conditioner operation.
The present invention is reasonable in design, simple in structure, by using refrigeration system pressure change monitoring device, can judge effectively whether air-conditioner is in the condition of non-normal working, judge that accurately air-conditioner refrigerating system pressure changes, the control air-conditioner carries out pre-alarm, rationally adjusts operational factor, thereby make the different hot operation environment of air-conditioner energy self adaptation, improve the service efficiency of air-conditioner.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and the specific embodiments.
Fig. 1 is the refrigerating circuit structural representation of prior art;
Fig. 2 is the refrigerating circuit structural representation of the embodiment of the invention one;
Fig. 3 is the refrigerating circuit structural representation of the embodiment of the invention two;
Fig. 4 is the circuit diagram of the control circuit of refrigeration system pressure change monitoring device of the present invention.
The specific embodiment
Embodiment one:
As shown in Figure 2, the refrigerating circuit of refrigeration system pressure change monitoring device of the present invention includes: compressor 1, four-way change-over valve 3, outdoor fan 4, condenser 5, main capillary 6, indoor fan 7, evaporimeter 8, refrigeration system pressure variation monitoring prior-warning device 2.On the gas exhaust piping that refrigeration system pressure change monitoring device 2 is connected between compressor and the four-way change-over valve;
Wherein, refrigeration system pressure variation monitoring prior-warning device 2 inlets join with the compressor air-discharging pipeline, it comprises the control circuit of pressure monitoring switch and transmission of electric signals, the output of control circuit is electrically connected with the control system of air-conditioner, pressure monitoring switch internal sensor is connected with controller by the transmission line, when the pressure of refrigeration system is higher than safety limit, feedback signal is connected in the circuit, through photoelectric coupling the forceful electric power signal is converted into weak electric signal, in time transfer to controller, controller control air-conditioner carries out pre-alarm, and when not carrying out the control model adjustment artificially, controller is automatically by master chip adjustment control parameter.Raise rapidly when pressure appears in the outside, compressor 1 can not suck enough cold-producing mediums and irregular working occur; When pressure at expulsion is higher than safety limit (being the starting pressure of pressure monitoring switch), the pressure monitoring switch motion, by control circuit output early warning signal, feedback is on the control system of air-conditioner, the control system of air-conditioner is by specific function output signal, as shown in Figure 4, under the pressure at expulsion normal condition, the L---N loop is unimpeded to be 220V, conducting is luminous because potential difference is arranged at the two ends of the interior light lotus root device PC817C light-emitting component of circuit, light-sensitive element conducting after sensing the light of light-emitting component is imported a signal and is given master chip.Master chip is in the control signal of output port output air-conditioner operate as normal then, and air-conditioner enters normal operation.When compressor 1 can not suck enough cold-producing mediums and when irregular working occurring the pressure monitoring switch disconnect, the then not conducting of two ends of light lotus root device PC817C light-emitting component in the circuit, light-sensitive element produces a fault-signal and inputs to master chip in induction luminous less than light-emitting component.Master chip is exported early warning signal at output port then, artificial air-conditioner is not operated and changed operational mode if having afterwards, then controller output changes the signal of indoor or outdoors motor speed, and the control motor reduces rotating speed or shuts down, and reaches the purpose that reduces condensation side pressure.
By refrigeration system pressure variation monitoring prior-warning device 2, can judge accurately that air-conditioner refrigerating system pressure changes, and carry out clear and definite pre-alarm, rationally adjust operational factor, thereby make the different hot operation environment of air-conditioner energy self adaptation, improve the service efficiency of air-conditioner.
Embodiment two:
Compare with embodiment one, among the embodiment two only refrigeration system be the single cold type air-conditioner, as shown in Figure 3, refrigeration system pressure variation monitoring prior-warning device 2 is connected between compressor and the condenser, or main capillary before pipeline on.
In the course of work of the present invention, when refrigerating circuit pressure just often, refrigeration system pressure variation monitoring prior-warning device 2 can not move, air-conditioner normally moves; When air-conditioner work undesired, when appearance pressure is undesired, pressure at expulsion is higher than pressure monitoring switch motion pressure, the pressure monitoring switch is in opening, carry out the signal transmission by relevant control circuit, signal is transferred to the controller system of air-conditioning, controller output early warning signal, and the operational factor that can regulate air-conditioner automatically, thereby in the control room, the outdoor fan motor running speed, to reach the change condensation load, can realize that air-conditioner runs well in bigger ambient temperature range.
Claims (10)
- But 1, a kind of self-adapting type air conditioner of early-warning for high pressure, comprise the refrigerating circuit that is in series by pipeline by compressor, indoor heat converter, outdoor heat converter and main capillary, it is characterized in that: in refrigerating circuit, be provided with refrigeration system pressure variation monitoring prior-warning device, described pressure variation monitoring prior-warning device comprises the control circuit of early-warning for high pressure switch and transmission of electric signals, described control circuit compares according to early-warning for high pressure switch detected pressures and reference pressure value, the control air-conditioner is reported to the police in advance, and enters adaptive control scheme.
- But 2, the self-adapting type air conditioner of early-warning for high pressure according to claim 1, it is characterized in that: when described refrigeration system pressure variation monitoring prior-warning device was applied in the cold-warm type air-conditioning device, it was connected on the gas exhaust piping between compressor and the four-way change-over valve.
- But 3, the self-adapting type air conditioner of early-warning for high pressure according to claim 1, it is characterized in that: when described refrigeration system pressure variation monitoring prior-warning device is applied in the single cold type air-conditioner, it is connected between compressor and the outdoor heat converter, or on the pipeline before the main capillary.
- But 4, the self-adapting type air conditioner of early-warning for high pressure according to claim 1 is characterized in that: described refrigeration system pressure variation monitoring prior-warning device comprises the control circuit of pressure monitoring valve and transmission of electric signals.
- But 5, the self-adapting type air conditioner of early-warning for high pressure according to claim 2 is characterized in that: the input of described control circuit is electrically connected with the pressure monitoring switch, and output is electrically connected with the control system of air-conditioner.
- But, be provided with the sensor of feedback signal in the described pressure monitoring switch 6, according to the self-adapting type air conditioner of claim 4 or 5 described early-warning for high pressure.
- But 7, the self-adapting type air conditioner of early-warning for high pressure according to claim 4, it is characterized in that: described control circuit comprises controller, the optocoupler that is electrically connected with its input, the relay that is electrically connected with its output, described optocoupler links to each other with sensor, and described relay links to each other with controller.
- But 8, a kind of control method of self-adapting type air conditioner of early-warning for high pressure is characterized in that: described control method comprises following step:A) the pressure monitoring switch detects pressure at expulsion and is higher than safety limit;B) sensor signal that is provided with feedback signal in the pressure monitoring switch is in time transferred to controller;C) signals transmission is: controller carries out pre-alarm by master chip control air-conditioner, adopts form early warning such as demonstration or auditory tone cues;D) in a preheating setting time, if artificially operational mode is not adjusted, controller will be adjusted the control parameter automatically by master chip;E) when refrigerating operaton, adjustment control parameter is: reduce the indoor machine fan motor speed, reduce the pressure of condensation side;F) when heating operation, adjustment control parameter is: reduce or stop the outdoor machine fan motor speed, reduce the pressure of condensation side;G) reduce when the pressure monitoring switch monitors pressure, the transmission signal is to controller, and when the force value that controller detects was lower than the reference pressure value, controller cancellation early warning was adjusted into former operational mode automatically.
- But 9, the control method of the self-adapting type air conditioner of early-warning for high pressure according to claim 8, it is characterized in that: in described step e), controller also can reduce the pressure of condensation side by adopting the means of adjusting refrigeration system flows such as electric expansion valve.
- But 10, the control method of the self-adapting type air conditioner of early-warning for high pressure according to claim 8, it is characterized in that: in described step f), controller also can reduce the pressure of condensation side by adopting the means of adjusting refrigeration system flows such as electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101236248A CN100436975C (en) | 2006-11-17 | 2006-11-17 | Self-adapting type air conditioner capable of early-warning for high pressure, and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101236248A CN100436975C (en) | 2006-11-17 | 2006-11-17 | Self-adapting type air conditioner capable of early-warning for high pressure, and control method |
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| CN1959309A true CN1959309A (en) | 2007-05-09 |
| CN100436975C CN100436975C (en) | 2008-11-26 |
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| CNB2006101236248A Expired - Fee Related CN100436975C (en) | 2006-11-17 | 2006-11-17 | Self-adapting type air conditioner capable of early-warning for high pressure, and control method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526257B (en) * | 2009-03-26 | 2010-11-10 | 宁波海诚电器有限公司 | Method for protecting compressor when air conditioner makes heat in high temperature environment |
| CN102466304A (en) * | 2010-11-16 | 2012-05-23 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| CN104697106A (en) * | 2013-12-09 | 2015-06-10 | 珠海格力电器股份有限公司 | Pressure control method of air conditioning system |
| CN104797897A (en) * | 2012-08-24 | 2015-07-22 | 开利公司 | Transcritical refrigerant vapor compression system high side pressure control |
| CN104896691A (en) * | 2015-06-11 | 2015-09-09 | 美的集团武汉制冷设备有限公司 | Air conditioner and operation control method therefor |
| CN105180279A (en) * | 2015-09-02 | 2015-12-23 | 广东美的制冷设备有限公司 | Split floor type air conditioner, anti-explosion control method and anti-explosion control device |
| CN105222281A (en) * | 2015-10-26 | 2016-01-06 | 珠海格力电器股份有限公司 | The method that air-conditioning high pressure detects and device |
| CN106062487A (en) * | 2014-09-26 | 2016-10-26 | 夏普株式会社 | Air conditioner |
| CN106839331A (en) * | 2017-03-06 | 2017-06-13 | 海信（广东）空调有限公司 | Air-conditioner high temperature pressure control method and air-conditioner |
| CN110779188A (en) * | 2019-11-05 | 2020-02-11 | 中国扬子集团滁州扬子空调器有限公司 | Control method for improving high-load operation performance of air conditioner refrigeration |
| CN116857805A (en) * | 2023-08-23 | 2023-10-10 | 德州隆达空调设备集团有限公司 | Intelligent fan and fire prevention valve monitoring system |
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| CN2117650U (en) * | 1992-03-17 | 1992-09-30 | 东北工学院 | Vacuum switch |
| CN1092153A (en) * | 1993-03-04 | 1994-09-14 | 陈国治 | The conditioner of main formula varying capacity of refrigerant |
| JPH06307741A (en) * | 1993-04-21 | 1994-11-01 | Fujitsu General Ltd | Air-conditioner |
| JP2966786B2 (en) * | 1995-12-29 | 1999-10-25 | 三洋電機株式会社 | Air conditioner |
| CN2268234Y (en) * | 1996-07-02 | 1997-11-19 | 解通 | Condensation pressure monitor |
| US6257005B1 (en) * | 2000-01-18 | 2001-07-10 | Scott Beatty | Air conditioner pressure status meter and warning device |
| CN1710359A (en) * | 2005-06-22 | 2005-12-21 | 广东科龙电器股份有限公司 | Safety prealarming device of refrigerating system |
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- 2006-11-17 CN CNB2006101236248A patent/CN100436975C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526257B (en) * | 2009-03-26 | 2010-11-10 | 宁波海诚电器有限公司 | Method for protecting compressor when air conditioner makes heat in high temperature environment |
| CN102466304A (en) * | 2010-11-16 | 2012-05-23 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| CN102466304B (en) * | 2010-11-16 | 2014-09-03 | 力博特公司 | Air-conditioning system and control method of condensation fan thereof |
| US10451325B2 (en) | 2012-08-24 | 2019-10-22 | Carrier Corporation | Transcritical refrigerant vapor compression system high side pressure control |
| CN104797897A (en) * | 2012-08-24 | 2015-07-22 | 开利公司 | Transcritical refrigerant vapor compression system high side pressure control |
| CN104697106B (en) * | 2013-12-09 | 2017-07-25 | 珠海格力电器股份有限公司 | Air-conditioning system compress control method |
| CN104697106A (en) * | 2013-12-09 | 2015-06-10 | 珠海格力电器股份有限公司 | Pressure control method of air conditioning system |
| CN106062487A (en) * | 2014-09-26 | 2016-10-26 | 夏普株式会社 | Air conditioner |
| CN104896691A (en) * | 2015-06-11 | 2015-09-09 | 美的集团武汉制冷设备有限公司 | Air conditioner and operation control method therefor |
| CN105180279A (en) * | 2015-09-02 | 2015-12-23 | 广东美的制冷设备有限公司 | Split floor type air conditioner, anti-explosion control method and anti-explosion control device |
| CN105222281A (en) * | 2015-10-26 | 2016-01-06 | 珠海格力电器股份有限公司 | The method that air-conditioning high pressure detects and device |
| CN105222281B (en) * | 2015-10-26 | 2018-02-27 | 珠海格力电器股份有限公司 | The method and device of air-conditioning high pressure detection |
| CN106839331A (en) * | 2017-03-06 | 2017-06-13 | 海信（广东）空调有限公司 | Air-conditioner high temperature pressure control method and air-conditioner |
| CN110779188A (en) * | 2019-11-05 | 2020-02-11 | 中国扬子集团滁州扬子空调器有限公司 | Control method for improving high-load operation performance of air conditioner refrigeration |
| CN116857805A (en) * | 2023-08-23 | 2023-10-10 | 德州隆达空调设备集团有限公司 | Intelligent fan and fire prevention valve monitoring system |
| CN116857805B (en) * | 2023-08-23 | 2024-01-05 | 德州隆达空调设备集团有限公司 | Intelligent fan and fire prevention valve monitoring system |
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| CN100436975C (en) | 2008-11-26 |
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Granted publication date: 20081126 Termination date: 20091217 |