CN101592388B - Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor - Google Patents
Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor Download PDFInfo
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Abstract
The invention discloses a control method for complete machine capability of a variable-capacity multi-connected unit, comprising the followings: according to the working mode, indoor unit load and environmental temperature of the variable-capacity multi-connected machine, determining the number of compressors to be started and whether to start relief valves; monitoring whether exhaust pressure is larger than a set value, if so, according to the number of the started the compressors, the situation whether to start the relief valves and the failure frequency of the variable-capacity multi-connected unit, redetermining the number of the variable-capacity multi-connected unit and whether to start the relief valves and/or diluent cooling valves. The invention also discloses a control system for complete machine capability of the variable-capacity multi-connected unit, comprising an outdoor unit, the indoor unit, compressors, relief valves and diluent cooling valves, further comprising a control module, a monitoring module and a correcting module. In the invention, by monitoring exhaust pressure to automatically alter complete machine capability output, phenomena of overhigh exhaust pressure and system alarm halt caused by environment temperature variation do not occur, thus achieving good cooling and heating effects.
Description
Technical field
The present invention relates to the air conditioner controlling technology field, particularly a kind of control method of complete machine capability of variable-capacity multi-connected unit and system.
Background technology
Variable-capacity multi-connected unit adopts pressure-relief valve to realize the varying capacity output of compressor, to satisfy the demand of indoor set different load.Because variable-capacity multi-connected unit is simple in structure, cost is low, and is easy to maintenance, is used widely in market.
Referring to Fig. 1, single compressor variable-capacity multi-connected unit system diagram.Comprise compressor 101, pressure-relief valve 102, Liquid injection cooling valve 103, gas-liquid separator 104, throttling arrangement electric expansion valve 105, high-pressure reservoir 106, condenser 107, cross valve 108, high-voltage switch gear 109 and low tension switch 110.Pressure-relief valve 102 is used for changing the Output pressure ability of compressor 101.But the ability output of single compressor is limited, can not satisfy the demand of many indoor sets, adopts multiple compressors in parallel, can improve the ability output of variable-capacity multi-connected unit, satisfies the demand of many indoor sets.
The variable-capacity multi-connected unit system that is formed by 2 compressors, referring to Fig. 2,2 compressor variable-capacity multi-connected unit system diagrams.Be that compressor 201 and compressor 202 are connected in parallel with Fig. 1 difference.Pressure-relief valve 203 is used for changing the pressure of compressor 201 and compressor 202.The variable-capacity multi-connected unit system that is formed by 3 compressors, referring to Fig. 3,3 compressor variable-capacity multi-connected unit system diagrams.Be that compressor 301, compressor 302 and compressor 303 are connected in parallel with Fig. 1 difference.Pressure-relief valve 304 is used for changing the pressure of compressor 301, compressor 302 and compressor 303.The employing multiple compressors is in parallel, the demand in the time of can satisfying many indoor set different loads.
Present this variable-capacity multi-connected unit mainly relies on the Output pressure ability that pressure-relief valve is regulated compressor.Variable-capacity multi-connected unit has very large limitation to the adaptation of environment temperature.When variation of ambient temperature was large, compressor was in order to adapt to this variation, and self pressure changes thereupon.When environment temperature rose to a certain degree, it was too high pressure at expulsion to occur.Solution is when development in laboratory at present, carries out a large amount of simulated tests, the ability output of compressor when simulating varying environment temperature, different indoor set load.This methods experiment amount is large, and corresponding compressor capacity output when being difficult to simulate all indoor sets loads.In case it is too high to occur pressure at expulsion in the running, the compressor shutdown of can reporting to the police.Still same fault alarm can occur after again starting, finally cause variable-capacity multi-connected unit to be shut down, can not satisfy user's demand.
Summary of the invention
The technical problem that the present invention solves provides a kind of control method of complete machine capability of variable-capacity multi-connected unit; the method complete machine capability output capable of automatic changing; can not occur because variation of ambient temperature causes the phenomenon that exhaust is too high, system alarm is shut down, thereby reach good refrigeration, heating effect.
The invention provides a kind of control method of complete machine capability of variable-capacity multi-connected unit, comprise
According to mode of operation, indoor set load and the environment temperature of described variable-capacity multi-connected unit, determine to open the number of units of compressor, and whether open pressure-relief valve;
Whether the monitoring pressure at expulsion is greater than setting value, in this way, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.
Preferably, also comprise when described variable-capacity multi-connected unit mode of operation is refrigeration, whether measure described environment temperature less than the first design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
Preferably, also comprise when described variable-capacity multi-connected unit mode of operation when heating, whether measure described environment temperature less than the second design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
Preferably, comprise that also off-premises station receives the demand code of the described indoor set payload of representative by connection, and to described demand code calculating summation, obtain the indoor set load.
Preferably, the scope of described the first design temperature is the 40-45 degree.
Preferably, the scope of described the second design temperature is the 20-25 degree.
Preferably, described pressure-relief valve cuts out or is 50-70 second by scope switching time that is closed to unlatching by being opened to.
The present invention also provides a kind of control system of complete machine capability of variable-capacity multi-connected unit, comprises off-premises station, indoor set, compressor, pressure-relief valve and Liquid injection cooling valve, also comprises control module, monitoring modular and correcting module;
Described control module is used for mode of operation, indoor set load and environment temperature according to described variable-capacity multi-connected unit, and control is opened the number of units of described compressor and whether opened described pressure-relief valve;
Whether described monitoring modular is used for the monitoring pressure at expulsion greater than setting value;
Described correcting module, be used for when described pressure at expulsion during greater than described setting value, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.
Preferably, also comprise the first measurement module, be used for when described variable-capacity multi-connected unit mode of operation is refrigeration, whether measuring described environment temperature less than the first design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
Preferably, also comprise the second measurement module, be used for when described variable-capacity multi-connected unit mode of operation when heating, whether measure described environment temperature less than the second design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered definite at first state.
Preferably, also comprise timing module, be used for calculating described pressure-relief valve and close or by the switching time that is closed to unlatching, the scope of described switching time is 50-70 second by being opened to.
Preferably, described off-premises station receives the demand code of the described indoor set payload of representative by connection, and to described demand code calculating summation, obtains the indoor set load.
Compared with prior art, the present invention has the following advantages:
The present invention determines to open the number of units of compressor, and whether opens pressure-relief valve according to mode of operation, indoor set load and the environment temperature of variable-capacity multi-connected unit; Whether the monitoring pressure at expulsion is greater than setting value, in this way, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve, carry out complete machine capability output and revise.The method is regulated the pressure of compressor by pressure-relief valve; the monitoring pressure at expulsion; if pressure at expulsion is too high; redefine the ability output of variable-capacity multi-connected unit; can not occur because variation of ambient temperature causes pressure at expulsion too high; cause the phenomenon that variable-capacity multi-connected unit is reported to the police and shut down, thereby reach good refrigeration, heating effect.
Description of drawings
Fig. 1 is single compressor variable-capacity multi-connected unit system diagram;
Fig. 2 is 2 compressor variable-capacity multi-connected unit system diagrams;
Fig. 3 is 3 compressor variable-capacity multi-connected unit system diagrams;
Fig. 4 is control method embodiment one flow chart of complete machine capability of variable-capacity multi-connected unit;
Fig. 5 is control method embodiment two flow charts of complete machine capability of variable-capacity multi-connected unit;
Fig. 6 is control method embodiment three flow charts of complete machine capability of variable-capacity multi-connected unit;
Fig. 7 is control system embodiment one schematic diagram of complete machine capability of variable-capacity multi-connected unit;
Fig. 8 is control system embodiment two schematic diagrames of complete machine capability of variable-capacity multi-connected unit.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Variable-capacity multi-connected unit adopts separate unit or multiple compressors, and pressure-relief valve and Liquid injection cooling valve are installed in system.According to environment temperature, and the indoor set load, the number of units of opening compressor automatically regulated; The monitoring pressure at expulsion; again opening or closing in conjunction with pressure-relief valve and Liquid injection cooling valve; realize the adjusting of variable-capacity multi-connected unit ability output; can not occur because variation of ambient temperature causes the too high phenomenon that causes that variable-capacity multi-connected unit is reported to the police and shut down of pressure at expulsion, thereby reach good refrigeration, heating effect.
Referring to Fig. 4, control method embodiment one flow chart of complete machine capability of variable-capacity multi-connected unit.Below in conjunction with concrete steps its course of work is described.
Step 401: according to mode of operation, indoor set load and the environment temperature of variable-capacity multi-connected unit, determine to open the number of units of compressor, and whether open pressure-relief valve.
For example described variable-capacity multi-connected unit comprises 2 compressors, and is in and heats mode of operation, when the load of indoor set greater than 6 less than or equal to 8, when environment temperature is spent less than 16 greater than 12 degree, determine that opening described compressor number of units is 2, and open described pressure-relief valve.
Step 402: whether the monitoring pressure at expulsion is greater than setting value, in this way, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.
For example the running status before the fault first time is unlatching 2 compressors in the above-mentioned steps 401, and opens pressure-relief valve; Redefine as opening 1 compressor after the fault for the first time, close pressure-relief valve; Redefine after the fault for the second time as opening 1 compressor, and open pressure-relief valve; Redefine after the fault for the third time as opening 1 compressor, and open pressure-relief valve and Liquid injection cooling valve.
Describe the control method of complete machine capability of variable-capacity multi-connected unit in detail below by form.SV1 in following all forms (Solenoid Valve) represents pressure-relief valve, and SV2 represents the Liquid injection cooling valve; X represents the indoor set load, and unit is (HP, a Horse Power); TA represents environment temperature, and unit is degree.Wherein table 1, table 3, table 5 are respectively single compressor, 2 compressors and the 3 compressors ability output control method when heating; Ability output control method when table 2, table 4, table 6 are respectively single compressor, 2 compressors and 3 compressors refrigeration.
Table 1 single compressor heats complete machine capability output control
Single compressor shown in the table 1 heats complete machine capability output control.P1, P2 represent different indoor set loads; TA1, TA2 represent different temperature with TA3.As can be seen from Table 1 when indoor set load X greater than P2, and environment temperature TA is during greater than TA3, complete machine capability output is controlled to be opens 1 compressor, and opens pressure-relief valve.
For example P1 is 3.5HP, and P2 is 6HP.TA1 is that 0 degree, TA3 are 16 degree for-3 degree, TA2.Wherein TA1, TA2 and TA3 also can be other numerical value, can be any one numerical value between the 0-12 degree such as TA2, and namely environment temperature is between the 0-12 degree, and complete machine output is controlled to be opens 1 compressor.
Table 2 single compressor refrigeration complete machine capability output control
The refrigeration of single compressor shown in the table 2 complete machine capability output control.Different from table 1 is that ambient temperature range is different, represents different temperature with TB1, TB2 and TB3.For example TB1 is that 24 degree, TB2 are that 28 degree, TB3 are 36 degree.Wherein TB1, TB2 and TB3 also can be a scope, and when temperature value was in this scope, identical control method was taked in complete machine capability output when identical indoor set was loaded.As being 24 when spending as TB1, TB2 can be any one numerical value between the 28-32 degree, and namely environment temperature TA is greater than 24 degree, and during less than or equal to any one numerical value between the 28-32 degree, complete machine output is controlled to be opens 1 compressor.
Table 32 compressors heat complete machine capability output control
| X≤N1 | 1 compressor | 1 compressor | 1 compressor+SV1 | 1 compressor+SV1 |
| N1＜X≤N2 | 1 compressor | 1 compressor | 1 compressor | 1 compressor+SV1 |
| N2＜X≤N3 | 2 compressors | 2 compressors | 2 compressors+SV1 | 2 compressors+SV1 |
| X＞N3 | 2 compressors | 2 compressors | 2 compressors | 2 compressors+SV1 |
2 compressors shown in the table 3 heat complete machine capability output control.To heat complete machine capability output control similar with single compressor, as shown in table 3ly represents that with N1, N2 and N3 different indoor sets loads.For example N1 is that 3.5HP, N2 are that 6HP, N3 are 8HP; TA1 is that 0 degree, TA3 are 16 degree for-3 degree, TA2.For example when indoor set load greater than 6HP less than 8HP, and environment temperature is when spending less than 16 greater than 0 degree, the control complete machine capability is opened pressure-relief valve for opening 2 compressors.
Table 42 compressors refrigeration complete machine capability output control
2 compressors shown in the table 4 heat complete machine capability output control, and table 4 only has ambient temperature range different from table 3, represents different temperature with TB1, TB2 and TB3.For example TB1 is that 24 degree, TB2 are that 28 degree, TB3 are 36.Wherein TB1, TB2 and TB3 also can be a scope, and when temperature value was in this scope, complete machine capability output taked to control same procedure when identical indoor set was loaded.As being 24 when spending as TB1, TB2 can be any one numerical value between the 28-32 degree, and namely environment temperature TA is greater than 24 degree, and less than or equal to any one numerical value between the 28-32 degree, and X is greater than 6HP during less than or equal to 8HP, and complete machine output is controlled to be opens 2 compressors.
Table 53 compressors heat complete machine capability output control
| M2＜X≤M3 | 2 compressors | 2 compressors | 2 compressors+SV1 | 2 compressors+SV1 |
| M3＜X≤M4 | 2 compressors | 2 compressors | 2 compressors | 2 compressors+SV1 |
| M4＜X≤M5 | 3 compressors | 3 compressors | 3 compressors+SV1 | 3 compressors+SV1 |
| X＞M5 | 3 compressors | 3 compressors | 3 compressors | 3 compressors+SV1 |
3 compressors shown in the table 5 heat complete machine capability output control.To heat complete machine capability output control similar with 2 compressors, as shown in table 5ly represents that with M1, M2, M3 and M4 different indoor sets loads.For example M1 is that 3.5HP, M2 are that 6HP, M3 are that 8HP, M4 are 16HP; TA1 is that 0 degree, TA3 are 16 degree for-3 degree, TA2.For example when indoor set load greater than 6HP less than 8HP, and environment temperature is when spending less than 16 greater than 0 degree, the control complete machine capability is opened pressure-relief valve for opening 2 compressors.
Table 63 compressors refrigeration complete machine capability output control
Shown in the table 6 is that 3 compressors heat complete machine capability output control, and table 6 only has ambient temperature range different from table 5, represents different temperature with TB1, TB2, TB3 and TB4.Represent different indoor set loads with M1, M2, M3 and M4.For example M1 is that 3.5HP, M2 are that 6HP, M3 are that 8HP, M4 are 16; For example TB1 is that 24 degree, TB2 are that 28 degree, TB3 are that 36 degree, TB4 are 40 degree.Wherein TB1, TB2, TB3 and TB4 also can be a scope, and when temperature range was in this scope, complete machine capability output taked to control same procedure when identical indoor set was loaded.As being 24 when spending as TB1, TB2 can be any one numerical value between the 28-32 degree, and namely environment temperature TA is greater than 24 degree, less than or equal to any one numerical value between the 28-32 degree, and during less than 16HP, complete machine output is controlled to be 2 compressors greater than 8HP for indoor set load.
Introduce when pressure at expulsion in the running surpasses setting value in detail below by table 7, redefine the control method of complete machine capability output.
The correction of table 7 complete machine capability of variable-capacity multi-connected unit
As shown in table 7, according to the compressor number of units of initial unlatching, whether open the number of stoppages that pressure-relief valve and described variable-capacity multi-connected unit occur, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.For example initial running status after for the first time fault clearance, is opened 2 compressors for opening 3 compressors when again starting; After for the second time fault clearance, open 2 compressors when again starting, and open pressure-relief valve; After the fault clearance, open 1 compressor for the third time.When initial running status is 1 compressor, through after twice fault, substantially can revise successfully, for the third time fault can not appear.
TC in the table 7 represents described the first design temperature, when described variable-capacity multi-connected unit mode of operation is refrigeration, whether measures described environment temperature less than TC, in this way, compressor, pressure-relief valve and Liquid injection cooling valve is recovered the initial state of determining.TH represents described the second design temperature, when described variable-capacity multi-connected unit mode of operation when heating, whether measure described environment temperature less than TH, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
For convenience of description, the following examples are in the refrigeration work pattern as example take the variable-capacity multi-connected unit of 3 compressors, and concrete complete machine capability control method is described.Referring to Fig. 5, control method embodiment two flow charts of complete machine capability of variable-capacity multi-connected unit.
Step 501: the indoor set of variable-capacity multi-connected unit receives the demand code that represents the indoor set payload by connection, and to this demand code summation, obtains the indoor set load.For example the 1HP ability need is designated as 1,2HP and is designated as 2,3HP and is designated as 3, and the rest may be inferred.For example First indoor set load is 2, the second to be 3, the three is 2, the then demand code summation of off-premises station to receiving, and obtaining the indoor set total load is 7.
Step 502: according to indoor set load and environment temperature, determine to open the number of units of compressor, and whether open pressure-relief valve.According to indoor set load and environment temperature, determine to open the number of units of compressor by above-mentioned table 6, and whether open pressure-relief valve.The indoor set that for example obtains in above-mentioned steps 501 load is 7HP, and less than 8HP, and temperature opens 2 compressors when spending less than or equal to 36 greater than 28 degree, do not open pressure-relief valve greater than 6HP.
Step 503: whether the monitoring pressure at expulsion surpasses setting value.In this way, enter step 504; As no, operation maintains the original state.
Step 504: according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening compressor, and whether open pressure-relief valve and Liquid injection cooling valve.For example set value when pressure at expulsion surpasses, for example above-mentioned steps 502 is described, and initial running status is to open 2 compressors.After for the first time fault clearance, open 2 compressors when again starting, and open pressure-relief valve; After for the second time fault clearance, open 1 compressor when again starting; After the fault clearance, open 1 compressor for the third time, and open pressure-relief valve.
Step 505: whether measures ambient temperature is less than or equal to the first design temperature.In this way, enter step 502; As no, operation maintains the original state.The scope of the first design temperature is the 40-45 degree.For example when variable-capacity multi-connected unit was in refrigeration, the first design temperature was 43 degree, when environment temperature is spent less than or equal to 43, returns to initial running status; When spending greater than 43, redefine the number of units of opening compressor according to table 7, and whether open pressure-relief valve or Liquid injection cooling valve.
Step 506: pressure-relief valve cuts out or by being controlled at 50-70 second the switching time that is closed to unlatching by being opened to.For fear of because variation of ambient temperature, cause that pressure-relief valve frequently opens or cut out, cause the pressure-relief valve infringement, the change-over switch duration of control pressure-relief valve is 50-70 second, for example is 60 seconds.For example, shown in the table 6, TA is during greater than TB2, and indoor set X is less than or equal to M1, according to starting 1 compressor, and opens the pressure-relief valve operation; When variation of ambient temperature, during TA=TB2, according to starting the operation of 1 compressor, at this moment pressure-relief valve just need to cut out, and pressure-relief valve need to continue 60S just closes, and avoids pressure-relief valve because variation of ambient temperature is frequently opened or closed.
Referring to Fig. 6, control method embodiment three flow charts of complete machine capability of variable-capacity multi-connected unit, different from Fig. 5 is that variable-capacity multi-connected unit is in the complete machine capability control method that heats mode of operation.Control method is similar, does not repeat them here.The scope of the second design temperature is the 20-25 degree, for example is 21 degree.
Based on the control method of above-mentioned complete machine capability of variable-capacity multi-connected unit, the present invention also provides the control system of complete machine capability of variable-capacity multi-connected unit, describes its part in detail below in conjunction with specific embodiment.
Referring to Fig. 7, control system embodiment one schematic diagram of complete machine capability of variable-capacity multi-connected unit.Comprise control module 701, monitoring modular 702, correcting module 703.
For example described variable-capacity multi-connected unit comprises 2 compressors, and is in and heats mode of operation, when the load of indoor set greater than 6 less than or equal to 8, when environment temperature was spent less than 16 greater than 12 degree, it was 2 that described compressor number of units is opened in control, and opens described pressure-relief valve.
Whether monitoring modular 702 monitoring pressures at expulsion are greater than setting value.In this way, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, correcting module 703 is revised the number of units of opening described compressor, and whether opens described pressure-relief valve and Liquid injection cooling valve.Described monitoring modular 702 is finished by high-voltage switch gear 109, high-voltage switch gear 210, high-voltage switch gear 311 corresponding among Fig. 1, Fig. 2, Fig. 3, and whether the pressure at expulsion of monitoring compressor is too high.
For example the running status before the fault first time is unlatching 2 compressors in the above-mentioned steps 701, and opens pressure-relief valve; Redefine as opening 1 compressor after the fault for the first time, close pressure-relief valve; Redefine after the fault for the second time as opening 1 compressor, and open pressure-relief valve; Redefine after the fault for the third time as opening 1 compressor, and open pressure-relief valve and Liquid injection cooling valve.
Referring to Fig. 7, control system embodiment two schematic diagrames of complete machine capability of variable-capacity multi-connected unit.
The first measurement module 805, when variable-capacity multi-connected unit was in the refrigeration work pattern, whether measures ambient temperature when less than or equal to described first design temperature, returned to for the first time fault front running status less than or equal to the first design temperature.
The second measurement module 806, when variable-capacity multi-connected unit is in when heating mode of operation, whether measures ambient temperature less than or equal to the second design temperature, when less than or equal to described the second design temperature, returns to the running status before the fault for the first time.
Function in control system embodiment one schematic diagram of control module 802, monitoring modular 803, correcting module 804 and complete machine capability of variable-capacity multi-connected unit is identical, does not repeat them here.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (12)
1. the control method of a complete machine capability of variable-capacity multi-connected unit is characterized in that, comprises
According to mode of operation, indoor set load and the environment temperature of described variable-capacity multi-connected unit, determine to open the number of units of compressor, and whether open pressure-relief valve;
Whether the monitoring pressure at expulsion is greater than setting value, in this way, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.
2. method according to claim 1, it is characterized in that, also comprise when described variable-capacity multi-connected unit mode of operation is refrigeration, whether measure described environment temperature less than the first design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
3. method according to claim 1, it is characterized in that, also comprise when described variable-capacity multi-connected unit mode of operation when heating, whether measure described environment temperature less than the second design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
4. method according to claim 1 is characterized in that, comprises that also off-premises station receives the demand code of the described indoor set payload of representative by connection, and to described demand code calculating summation, obtains the indoor set load.
5. method according to claim 2 is characterized in that, the scope of described the first design temperature is the 40-45 degree.
6. method according to claim 3 is characterized in that, the scope of described the second design temperature is the 20-25 degree.
7. method according to claim 1 is characterized in that, described pressure-relief valve cuts out or is 50-70 second by scope switching time that is closed to unlatching by being opened to.
8. the control system of a complete machine capability of variable-capacity multi-connected unit comprises off-premises station, indoor set, compressor, pressure-relief valve and Liquid injection cooling valve, it is characterized in that, also comprises control module, monitoring modular and correcting module;
Described control module is used for mode of operation, indoor set load and environment temperature according to described variable-capacity multi-connected unit, and control is opened the number of units of described compressor and whether opened described pressure-relief valve;
Whether described monitoring modular is used for the monitoring pressure at expulsion greater than setting value;
Described correcting module, be used for when described pressure at expulsion during greater than described setting value, according to the compressor number of units of above-mentioned unlatching, whether open pressure-relief valve and the described variable-capacity multi-connected unit number of times that breaks down, redefine the number of units of opening described compressor, and whether open described pressure-relief valve and Liquid injection cooling valve.
9. system according to claim 8, it is characterized in that, also comprise the first measurement module, be used for when described variable-capacity multi-connected unit mode of operation is refrigeration, whether measure described environment temperature less than the first design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
10. system according to claim 8, it is characterized in that, also comprise the second measurement module, be used for when described variable-capacity multi-connected unit mode of operation when heating, whether measure described environment temperature less than the second design temperature, in this way, compressor, pressure-relief valve and Liquid injection cooling valve are recovered the initial state of determining.
11. system according to claim 8 is characterized in that, also comprises timing module, is used for calculating described pressure-relief valve and closes or by the switching time that is closed to unlatching, the scope of described switching time is 50-70 second by being opened to.
12. system according to claim 8 is characterized in that, described off-premises station receives the demand code of the described indoor set payload of representative by connection, and to described demand code calculating summation, obtains the indoor set load.
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| CN102466301B (en) * | 2010-11-19 | 2013-10-16 | 约克广州空调冷冻设备有限公司 | Method and system for loading and deloading unit module in module unit |
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