CN1888749A - Method for controlling central air conditioner electromagnetic expanding valve - Google Patents
Method for controlling central air conditioner electromagnetic expanding valve Download PDFInfo
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- CN1888749A CN1888749A CN 200510014043 CN200510014043A CN1888749A CN 1888749 A CN1888749 A CN 1888749A CN 200510014043 CN200510014043 CN 200510014043 CN 200510014043 A CN200510014043 A CN 200510014043A CN 1888749 A CN1888749 A CN 1888749A
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Abstract
This invention provides a kind of expanding valve controlling method of central air conditioner. The method includes: whether the air conditioner is under abnormal controlling state and normal controlling state is judged; if it is under abnormal controlling state, then the aperture of magnetic expanding valve is controlled in t1 phase within A minutes. If it is under normal controlling state, then the aperture of magnetic expanding valve is controlled in t2 phase. This invention makes the opening of magnetic expanding valve adjusted more quickly under abnormal controlling state. During abnormal controlling state, when the opening controlling phase of magnetic expanding valve is shorter than that under normal controlling state, the opening can be quickly adjusted to prevent traditional compressor from emerging overload current or being locked.
Description
Technical field
The present invention is the invention of relevant air conditioning control method, particularly under unusual state of a control, and the control method of the central air-conditioning electromagnetic expanding valve that can control electromagnetic expanding valve immediately according to concrete situation.
Background technology
Air-conditioning is arranged on spaces such as room, room, office or business shop, and temperature, humidity, dustiness and the air-flow of room air are regulated, and forms pleasant environment.Air-conditioning can be divided into a bodily form machine (window type) substantially and divide bodily form machine (seperate or split type).
An above-mentioned bodily form and the branch bodily form have identical functions, and a bodily form air-conditioning integrates body to the function of cooling heat release, is placed on wall perforating place or the window.Divide the bodily form air-conditioning cooling device to be set, and compression set is set, connect two devices that are separated from each other by the refrigerant pipe in the outside in the indoor.
Usually corresponding to an indoor set off-premises station is set.But when having a plurality of room, when adopting said structure, corresponding with each room indoor set respectively a plurality of off-premises stations need be set.Not only influence architectural appearance, and cost of idleness, and take very big space.
Therefore, developing and to be connected on many indoor sets with an off-premises station, simultaneously the central air-conditioning that each room is freezed, heats.
Fig. 1 is the refrigerant flow block diagram of common air-conditioning.
Described central air-conditioning has and is arranged on indoor indoor unit 10 and is arranged on outdoor outdoor unit 1.Indoor unit 10 has many indoor heat converter 11a of the refrigeration carried out, heat-production functions, 11b, 11c.
Above-mentioned outdoor unit 1 has compressor with variable 2 and constant speed compressor 4 that refrigerant is compressed, allow the outdoor heat converter 6 of refrigerant heat release of compression and the rear that is arranged on above-mentioned outdoor heat converter 6, promotes the outdoor fan 8 of refrigerant heat release.
Refrigerant flow direction during with refrigerating operaton is as the criterion, and the downstream of above-mentioned outdoor heat converter 6 is provided with and allows refrigerant flow into respective chambers heat exchanger 11a, obtains the electromagnetic expanding valve 13a of puffing before the 11b, 11c, 13b, 13c.
In addition, above-mentioned constant speed compressor 4 and compressor with variable 2 have with the maximum refrigeration of indoor unit respectively, heat load 50% corresponding compressed capability, and the outlet of each compressor was joined (with reference to " A ") before refrigerant inflow outdoor heat exchanger 6 mutually.
Below, above-mentioned central air-conditioning refrigerating operaton is described (refrigerating operaton).
The HTHP gaseous coolant of compressor 2,4 compression, by cross valve (figure slightly) water conservancy diversion behind outdoor heat converter 6.Flow through in the process of above-mentioned outdoor heat converter 6, be condensed into the liquid refrigerant of HTHP.The liquid refrigerant of HTHP from outdoor heat converter 6 flows out flows through electromagnetic expanding valve 13a, and 13b is transformed into the low-temp low-pressure state during 13c, flow into above-mentioned indoor heat converter 11a, 11b, 11c.Here, the above-mentioned refrigerant of inflow is evaporated into gaseous coolant, by the suction side of cross valve (figure slightly) water conservancy diversion to compressor 2,4.
Here, the adjustment of conditioned space (that is, indoor), by indoor heat converter 11a, refrigerant and the heat exchange action between the room air in the 11b, 11c are carried out.That is, flows through the refrigerant of above-mentioned indoor heat converter,, evaporate, and air is absorbed heat by above-mentioned refrigerant from the absorption of air heat, be lowered temperature after, flow into the interior space.Along with carrying out above-mentioned kind of refrigeration cycle repeatedly, the temperature of conditioned space is gradually reduced.
Compare with the common air-conditioning that is connected an indoor set on the off-premises station, above-mentioned central air-conditioning can utilize an off-premises station simultaneously a plurality of rooms to be freezed, heat, and its power consumption, expense and aspect, space all have advantage.
For central air-conditioning, electromagnetic expanding valve 13a, 13b, 13c allow the refrigerant that flows through outdoor heat converter 6 reduce pressure, and make it to reduce self temperature, and the coolant quantity that flows into each indoor heat converter 11a, 11b, 11c is regulated.
Turn on the umber of pulse of electromagnetic expanding valve 13a, 13b, 13c by increase and decrease, its aperture (that is degree of opening) is regulated.Usually, when increasing umber of pulse, its aperture increases, the more refrigerant of volume that circulates, and when reducing umber of pulse, its aperture reduces, and allows the refrigerant of less amount flow through.The variation of umber of pulse changes relevant with the load capacity of each indoor heat converter.Such as when refrigeration, owing to design temperature reduces or the load of reason indoor heat converter such as outdoor temperature rising when increasing, turn on the umber of pulse of electromagnetic expanding valve by raising, increase its aperture, improve the refrigerant circulation.
Usually, to electromagnetic expanding valve 13a, 13b, the aperture of 13c is controlled by control part (figure slightly).The indoor heat converter loading condition that control part changes at any time for correspondence at a certain time interval, such as 2 minutes, is regulated the aperture of electromagnetic expanding valve.
But there is following temperature in traditional control method of controlling the electromagnetic expanding valve aperture by certain hour at interval.When the indoor heat converter load changes or enters security control pattern etc. suddenly, air-conditioning appears very during state of a control, can not regulate aperture immediately corresponding to above-mentioned variation.Such as when refrigeration, the user reduces design temperature, when the load of indoor heat converter is sharply risen, control part by improving compressor with variable frequency or open mode such as constant speed compressor, change the coolant quantity that compressor is discharged.But the aperture of electromagnetic expanding valve is not owing to also arrive the change cycle (that is, not having through 2 minutes) after nearest adjusting aperture sometimes, and its aperture also keeps original aperture.At this moment,, the discharge pressure of compressor is risen, cause compressor overcurrent to occur or by locked phenomenon because a large amount of refrigerants that compressor is discharged can increase in the compression of electromagnetic expanding valve entrance side.
Therefore, need provide air-conditioning only to need suddenly as very during state of a control, immediately the electromagnetic expansion valve control method of corresponding above-mentioned state.
Summary of the invention
The objective of the invention is to: a kind of control method of central air-conditioning electromagnetic expanding valve is provided,, electromagnetic expanding valve is controlled immediately corresponding to unusual state of a control.
For achieving the above object, the technical solution used in the present invention provides a kind of control method of central air-conditioning electromagnetic expanding valve, and wherein: this method comprises: be in very to air-conditioning that state of a control still is normal state of a control, the stage of judging; Be in very state of a control if be judged as, then in A minute, the aperture of electromagnetic expanding valve controlled with the t1 cycle, be in normal state of a control if be judged as, then the stage of above-mentioned aperture being controlled with the cycle of t2.
The described t1 cycle is less than the t2 cycle.
Described very state of a control is the certain hour when entering normal state of a control after start-up control finishes suddenly; Or the certain hour after the indoor heat converter load variations; Or begin to carry out certain hour after the security control according to the sensing results of safety device, all make the compressor operating frequency take place sharply to change.
Effect of the present invention is this control method, the air-conditioning state is divided into very state of a control and normal state of a control, be in very state of a control if be judged as, then the aperture of electromagnetic expanding valve is controlled with the t1 time cycle, be in normal state of a control and be judged as, then carry out above-mentioned aperture control, make the aperture of electromagnetic expanding valve more promptly adjusted under abnormal condition with the t2 time cycle.And when being in very state of a control, when the aperture control cycle of electromagnetic expanding valve is shorter than normal state of a control, can aperture be regulated immediately by abnormal condition, can prevent that overload current from appearring in traditional compressor or by locked phenomenon.
Description of drawings
Fig. 1 is an ordinary central air-conditioner refrigerant flow block diagram;
Fig. 2 is the central air-conditioning entire block diagram of one embodiment of the invention;
Fig. 3 is a central air-conditioning electromagnetic expansion valve control method flow chart of the present invention.
Among the figure:
140: indoor set 142: indoor heat converter
144: indoor fan 162: electromagnetic expanding valve
180: off-premises station 182: compressor with variable
184: constant speed compressor 186: lubricating oil separator
187: electromagnetic expanding valve 188: return duct
192: cross valve 190: fluid reservoir
194: outdoor heat converter 196: outdoor fan
The specific embodiment
Below, with reference to accompanying drawing,, be elaborated to central air-conditioning electromagnetic expansion valve control method of the present invention.
As shown in Figure 2, indoor each indoor set 140 that is respectively equipped with of each of central air-conditioning, indoor set 140 has indoor heat converter 142 and indoor fan 144.This indoor set 140 links to each other with outdoor off-premises station 180 by pipe arrangement.
On the off-premises station 180, the central compressor that is made of compressor with variable 182 and constant speed compressor 184 is installed, these compressors are used for the refrigerant of circulation air-conditioning is compressed into high-temperature high-pressure state, and discharge above-mentioned refrigerant.On the outlet of above-mentioned compressor with variable 182, the lubricating oil separator 186 that is used to separate refrigerant and lubricating oil is installed.The lubricating oil that lubricating oil separator 186 is discharged from compressor with variable 182 outlets and the mixture of refrigerant, isolate lubricating oil after, allow refrigerant recycle.Lubricating oil in the above-mentioned lubricating oil separator 186 flows to the input of compressor with variable 182 by magnetic valve 187 and return duct 188.
The refrigerant that compressor 182 and each outlet of 184 are discharged, when flowing through above-mentioned lubricating oil separator 186, its lubricating oil that contains is removed, and confluxes when flowing through lubricating oil collecting pipe 189, flows in the cross valve 192.The refrigerants that cross valve 192 allows compressor 182 and 184 suck or to discharge, circulate with the path that accords with operation of air conditioner mode (freeze or heat), allow refrigerant flow during refrigeration, allow refrigerant flow when heating by the dotted arrow direction of Fig. 2 by the solid arrow direction of Fig. 2.Refrigerant inflow outdoor heat exchanger 194 when refrigerating operaton that each compressor 182,184 is discharged, inflow indoor heat exchanger 140 when heating operation.
One end of above-mentioned outdoor heat converter 194 is connected cross valve 192, and its other end is connected on the electromagnetic expanding valve 162.When therefore, flowing through above-mentioned outdoor heat converter 194 and the outdoor air refrigerant that carries out heat exchange can flow through electromagnetic expanding valve 162.Electromagnetic expanding valve 162 is to allow the refrigerant puffing become the device of low-temp low-pressure state.After becoming the low-temp low-pressure refrigerant when flowing through above-mentioned electromagnetic expanding valve 162, flow through receiver 164 and drier 166 after, flow into indoor set 140.
Flow into the low-temp low-pressure refrigerant of indoor set 140, under the effect of indoor fan 144, flow through indoor heat converter 142,, reduce indoor temperature by carrying out heat exchange with room air.
One end of above-mentioned indoor set 140 is connected on the cross valve 192, finishes the refrigerant of heat exchange when flowing through indoor heat converter 142, flow into cross valve 140 after, by its water conservancy diversion in fluid reservoir 190.Fluid reservoir 190 is connected the suction portion of compressor with variable 182 and constant speed compressor 184, and the liquid refrigerants of failing when preventing to flow through indoor heat converter 140 to obtain gasifying flows in each compressor 182,184.
In the conventional art, control part is regulated the aperture of electromagnetic expanding valve at regular intervals.Promptly, when the loading condition of indoor heat converter occurs suddenly changing or air-conditioning enters security control situation etc. suddenly, when state of a control occurring very, air-conditioning was still to regulate through certain hour since last time, after 2 minutes, again the aperture of electromagnetic expanding valve is regulated, make it to be coincident with the loading condition of indoor heat converter.
But from starting that operation is transformed into normal operation or the indoor heat converter loading condition changes or entering security control state etc. suddenly according to the sensing results air-conditioning of various safe sensing devices, very state of a control may appear much in air-conditioning behind the starting of air conditioner.At this moment, other parts of air-conditioning are reacted according to situation immediately such as compressor etc., but electromagnetic expanding valve is waited for the aperture change cycle, if do not arrive the aperture change cycle, then do not take any reaction.When the coolant quantity of discharging when compressor increased, if the openness of electromagnetic expanding valve remains unchanged, then the discharge pressure of compressor rose, and compressor overload current might occur or by locked phenomenons such as (lock).
The present invention is according to different situations, with the aperture of different periodic Control electromagnetic expanding valves.Promptly, under common control situation, identical with conventional art, with t2, the aperture of electromagnetic expanding valve is controlled such as 2 minutes cycles, but when being in very state of a control, at setting-up time A minute, in 10 minutes, with t1, such as 1 minute cycle, the aperture of electromagnetic expanding valve is controlled.
Therefore, when the electromagnetic expanding valve aperture control cycle when being in unusual state of a control is shorter than normal state of a control, can carry out the aperture change immediately, can prevent that overload current from appearring in compressor or by locked according to unusual situation.
Fig. 3 is a central air-conditioning electromagnetic expansion valve control method flow chart of the present invention.
Air-conditioning electromagnetic expansion valve control method of the present invention comprises two stages substantially.That is, be in very to air-conditioning that state of a control still is normal state of a control, the stage of judging; Be in very state of a control if be judged as, then in A minute, the aperture of electromagnetic expanding valve controlled with the t1 cycle, be in normal state of a control if be judged as, then the stage of above-mentioned aperture being controlled with the cycle of t2.Here above-mentioned t1 is less than t2.
Above-mentioned very state of a control is to finish to enter after the start-up control of compressor the certain hour of normal control; Indoor heat converter load certain hour after changing; Entering certain hour after the security control according to the sensing results of safety device, all is that state jumpy takes place the compressor operating frequency.
Below, with reference to flow chart, the control method of electromagnetic expanding valve is elaborated.
The user is by the key input part of operating air conditioner, and behind the startup air-conditioning, outdoor fan, indoor fan and compressor are activated, and air-conditioning is started working (S100 stage).
After operation of air conditioner began, compressor was carried out initiating task within a certain period of time.If when air-conditioning quilt starts compressor is normally controlled (with the control of carrying out with the corresponding running frequency of load), each parts in the compressor of then not working for a long time because unexpected load increases, might break down.Therefore normally controlling latently, carrying out start-up control by certain hour earlier, can allow compressor drive swimmingly.
After carrying out start-up control within a certain period of time, compressor starts is normally controlled.At this moment, the running frequency of compressor is sharply risen, and air-conditioning can be in very state of a control.Control part finishes the time period that the compressor operating frequency after the start-up control sharply rises to whether being in, that is, have after start-up control finished and do not pass through A minute, judges.If do not pass through A minute (S110), then be judged as air-conditioning and be in very state of a control, with t1,, electromagnetic expanding valve is carried out aperture control (S120 stage) such as 1 minute cycle.
If judged result is for passing through A minute in the stage at above-mentioned S110, the abnormal condition that then is judged as after start-up control finishes is removed, and carries out next stage.
After the load of indoor heat converter changed, whether passed through A minute, judged (S130 stage).In the process of operation of air conditioner, if the user improves or reduce design temperature or outdoor temperature rises or reduction, then the running frequency of compressor can change.Therefore air-conditioning carries out very situation control within a certain period of time for the load that correspondence changes.If the judged result of control part was not also passed through A minute after changing for the indoor heat converter load, then be judged as air-conditioning and also be in very state of a control, with t1,, electromagnetic expanding valve is carried out aperture control (S120 stage) such as 1 minute cycle.
If for passing through A minute, the abnormal condition that then is judged as after the indoor heat converter load variations is removed, and carries out next stage in the judged result of above-mentioned S130 in the stage.
Whether control part passed through A minute after air-conditioning is begun security control according to the sensing results of safety device, judged (S140 stage).Because excessive work, when the temperature of compressor rises too high or the temperature of off-premises station heat sink rises too high or the outdoor piping temperature rises too high, safety device perceives certain signal, make control part reduce compressor frequency or close compressor automatically, allow air-conditioning enter the security control state suddenly.After security control begins, in certain hour section inner compressor frequency rapid variation can take place.Whether control part to passing through A minute, is judged after above-mentioned air-conditioning begins security control.If also do not pass through A minute, then be judged as air-conditioning and also be in very state of a control, with t1,, electromagnetic expanding valve is carried out aperture control (S120 stage) such as 1 minute cycle.
If for passing through A minute, then control part is judged as air-conditioning and is in normal state of a control in the judged result of above-mentioned S140 in the stage,,, electromagnetic expanding valve is carried out aperture control (S150 stage) such as 2 minutes cycle with t2.
Claims (3)
1, a kind of control method of central air-conditioning electromagnetic expanding valve is characterized in that: this method comprises:
Be in very to air-conditioning that state of a control still is normal state of a control, the stage of judging;
Be in very state of a control if be judged as, then in A minute, the aperture of electromagnetic expanding valve controlled with the t1 cycle, be in normal state of a control if be judged as, then the stage of above-mentioned aperture being controlled with the cycle of t2.
2, according to the control method of the described central air-conditioning electromagnetic expanding valve of claim 1, it is characterized in that: the described t1 cycle is less than the t2 cycle.
3, according to the control method of the described central air-conditioning electromagnetic expanding valve of claim 1, it is characterized in that: described very state of a control is the certain hour when entering normal state of a control after start-up control finishes suddenly; Or the certain hour after the indoor heat converter load variations; Or begin to carry out certain hour after the security control according to the sensing results of safety device, all make the compressor operating frequency take place sharply to change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100140436A CN100455955C (en) | 2005-06-28 | 2005-06-28 | Method for controlling central air conditioner electromagnetic expanding valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100140436A CN100455955C (en) | 2005-06-28 | 2005-06-28 | Method for controlling central air conditioner electromagnetic expanding valve |
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| CN1888749A true CN1888749A (en) | 2007-01-03 |
| CN100455955C CN100455955C (en) | 2009-01-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254311A (en) * | 2020-10-14 | 2021-01-22 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and air conditioner |
| CN113883652A (en) * | 2021-10-27 | 2022-01-04 | 南京天加环境科技有限公司 | Control method for outdoor fan of variable frequency air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2776978B2 (en) * | 1990-11-28 | 1998-07-16 | 株式会社日立製作所 | Air conditioner |
| CN1083204A (en) * | 1992-08-18 | 1994-03-02 | 朱日昭 | A kind of Automatic adjustment method of refrigerant flow and device |
| JP2000130868A (en) * | 1998-10-28 | 2000-05-12 | Tokyo Gas Co Ltd | Lorentz-cyclic heat pump system utilizing non-azeotropic mixed refrigerant as working fluid |
| KR100382488B1 (en) * | 2000-11-10 | 2003-05-09 | 엘지전자 주식회사 | Method for controlling Linear Expantion Valve of air conditioner with 2 compressors |
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2005
- 2005-06-28 CN CNB2005100140436A patent/CN100455955C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112254311A (en) * | 2020-10-14 | 2021-01-22 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and air conditioner |
| CN112254311B (en) * | 2020-10-14 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and air conditioner |
| CN113883652A (en) * | 2021-10-27 | 2022-01-04 | 南京天加环境科技有限公司 | Control method for outdoor fan of variable frequency air conditioner |
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| CN100455955C (en) | 2009-01-28 |
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Granted publication date: 20090128 Termination date: 20110628 |