CN104728091A - Exhaust temperature control method and device for compressor - Google Patents
Exhaust temperature control method and device for compressor Download PDFInfo
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- CN104728091A CN104728091A CN201310717718.8A CN201310717718A CN104728091A CN 104728091 A CN104728091 A CN 104728091A CN 201310717718 A CN201310717718 A CN 201310717718A CN 104728091 A CN104728091 A CN 104728091A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 143
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract 9
- 239000007921 spray Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 230000009514 concussion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a method and a device for controlling the exhaust temperature of a compressor. The method for controlling the exhaust temperature of the compressor comprises the following steps: collecting the exhaust temperature of a compressor; calculating the liquid spraying amount of a liquid spraying solenoid valve according to the exhaust temperature of the compressor, wherein the liquid spraying solenoid valve is used for reducing the exhaust temperature of the compressor through liquid spraying; and controlling the liquid spraying solenoid valve to spray liquid through the calculated liquid spraying amount of the liquid spraying solenoid valve. By the method and the device, the problem that the control of the liquid spraying amount is inaccurate in the prior art is solved, so that the effect of accurately controlling the liquid spraying amount is achieved.
Description
Technical field
The present invention relates to compressor field, in particular to a kind of delivery temperature controlling method and device of compressor.
Background technique
In the running of compressor, if pressure ratio is excessive or inhalation temperature is too high, delivery temperature can be caused very high, too high delivery temperature can make the lubricant oil carbonization of discharging together, thus the lubrication lost compressor moving element, the delivery temperature that must control compressor compressor even can be made to burn, so could ensure the reliable operation of compressor in rational scope.Be coarse adjustment to the adjustment of spouting liquid at present conventional delivery temperature control mode, in order to make temperature lower, spouting liquid may be excessive, and during so not only causing hydrojet, the loss of refrigerating capacity is very large, and delivery temperature is also unstable, can fluctuate in the larger context.
For controlling the coarse problem of spouting liquid in prior art, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is the delivery temperature controlling method and the device that provide a kind of compressor, controls the coarse problem of spouting liquid to solve in prior art.
To achieve these goals, according to an aspect of the present invention, a kind of delivery temperature controlling method of compressor is provided.Delivery temperature controlling method according to compressor of the present invention comprises: the delivery temperature of collect and process machine; Calculate the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, wherein, hydrojet solenoid valve is used for the delivery temperature being reduced compressor by hydrojet; And control hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated.
Further, comprise according to the spouting liquid of the delivery temperature calculating hydrojet solenoid valve of compressor: judge whether the delivery temperature of compressor is greater than predefined value; If judge that the delivery temperature of compressor is greater than predefined value, then control hydrojet solenoid valve hydrojet; And if judge that the delivery temperature of compressor is less than predefined value, then control hydrojet solenoid valve not hydrojet.
Further, after the delivery temperature of collect and process machine, delivery temperature controlling method also comprises:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature when measuring for the K time, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
Further, control hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated to comprise: the hydrojet time utilizing following formulae discovery hydrojet solenoid valve
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
Further, control hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated to comprise: the stopping hydrojet time utilizing following formulae discovery hydrojet solenoid valve
T2=Q（k）*T，
Wherein, T2=Q(k) * T represents shut-in time of hydrojet solenoid valve, T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
Further, it is characterized in that, the delivery temperature of collect and process machine comprises: gather the first delivery temperature and the second delivery temperature, wherein, gathering the first delivery temperature with the interval time of collection the second delivery temperature is T, first delivery temperature and the second delivery temperature are the adjacent delivery temperature collected for twice, and the spouting liquid calculating hydrojet solenoid valve according to the delivery temperature of compressor comprises: utilize the first delivery temperature and the second delivery temperature to calculate the spouting liquid of hydrojet solenoid valve.
To achieve these goals, according to a further aspect in the invention, a kind of exhaust temperature control device of compressor is provided.Exhaust temperature control device according to compressor of the present invention comprises: collecting unit, for the delivery temperature of collect and process machine; Computing unit, for calculating the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, wherein, hydrojet solenoid valve is used for the delivery temperature being reduced compressor by hydrojet; And first control unit, the spouting liquid for the hydrojet solenoid valve by calculating controls hydrojet solenoid valve hydrojet.
Further, exhaust temperature control device also comprises: judging unit, for after the delivery temperature of collect and process machine, judges whether the delivery temperature of compressor is greater than predefined value; Second control unit, for when judging that the delivery temperature of compressor is greater than predefined value, controls hydrojet solenoid valve hydrojet; And when judging that the delivery temperature of compressor is less than predefined value, control hydrojet solenoid valve not hydrojet.
Further, computing unit comprises for the spouting liquid calculating hydrojet solenoid valve in the following manner:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature when measuring for the K time, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
Further, the first control unit comprises control opening module, controls opening module for utilizing the hydrojet time of following formulae discovery hydrojet solenoid valve:
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
Further, the first control unit comprises control closing module, controls closing module for utilizing the stopping hydrojet time of following formulae discovery hydrojet solenoid valve:
T2=Q（k）*T，
Wherein, T2 represents the shut-in time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
Further, collecting unit is for gathering the first delivery temperature and the second delivery temperature, wherein, gathering the first delivery temperature with the interval time of collection the second delivery temperature is T, first delivery temperature and the second delivery temperature are the adjacent delivery temperature collected for twice, the spouting liquid of computing unit also for utilizing the first delivery temperature and the second delivery temperature to calculate hydrojet solenoid valve.
By the present invention, adopt the delivery temperature of collect and process machine; Calculate the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, wherein, hydrojet solenoid valve is used for the delivery temperature being reduced compressor by hydrojet; And control hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated, solve in prior art and control the coarse problem of spouting liquid, and then reach the effect accurately controlling spouting liquid.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the compressor exhaust temperature control system according to the embodiment of the present invention;
Fig. 2 is the flow chart of the delivery temperature controlling method of compressor according to the embodiment of the present invention; And
Fig. 3 is the schematic diagram of the exhaust temperature control device according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiments provide a kind of exhaust temperature control system of compressor.Compressor exhaust temperature control system below in conjunction with accompanying drawing 1 pair of embodiment of the present invention is described.
Compressor 100 comprises sucking pipe 1 and outlet pipe 2, sucking pipe 1 is connected with the first end of hydrojet solenoid valve 200, second end of hydrojet solenoid valve 200 is connected with feed pipe 300, outlet pipe 2 is connected with the first end of controller 400, and the second end of this controller 400 is connected with hydrojet solenoid valve 200.
In compressor operation, sucking pipe 1 suction gas of compressor 100, in order to make from outlet pipe 2 discharge gas temperature can not be too high, a certain amount of refrigerant liquid is sprayed into sucking pipe 1, refrigerant liquid absorbs the heat produced in compressor 100 compression process, reduces compressor 100 delivery temperature.
Controller 400 is connected with between outlet pipe 2 and hydrojet solenoid valve 200.Controller 400 gathers the delivery temperature of outlet pipe 2, when delivery temperature exceedes setting value, controller 400 controls hydrojet solenoid valve 200 and opens, hydrojet solenoid valve 200 gets cooling liquid from feed pipe 300, Liquid injection cooling is carried out to the sucking pipe 1 of compressor 100, the delivery temperature of outlet pipe 2 is reduced.When delivery temperature is reduced to below set point, controller 400 controls hydrojet solenoid valve 200 and closes, and hydrojet stops.
The delivery temperature of outlet pipe 2 is gathered by controller 400, and judge the size of delivery temperature and setting value, when delivery temperature exceedes setting value, controller 400 controls hydrojet solenoid valve 200 and opens, hydrojet reduces delivery temperature, when delivery temperature is lower than setting value, controller 400 controls hydrojet solenoid valve 200 and closes, and stops hydrojet.
Controller 400 controls unlatching or the closedown of hydrojet solenoid valve 200 according to the delivery temperature of outlet pipe 2, is described below in conjunction with the delivery temperature controlling method of accompanying drawing to the control outlet pipe 2 of the embodiment of the present invention.
Fig. 2 is the flow chart of the delivery temperature controlling method of compressor according to the embodiment of the present invention.
Step S202, the delivery temperature of collect and process machine.
Step S204, calculates the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, wherein, hydrojet solenoid valve is used for the delivery temperature being reduced compressor by hydrojet.
Step S206, controls hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated.
Gather delivery temperature by the temperature-sensitive bag 3 on outlet pipe 2, and the delivery temperature collected is sent to controller 400.
Controller 400 calculates the spouting liquid of hydrojet solenoid valve 200 according to the delivery temperature of the compressor collected, and is controlled the amplitude of variation of the delivery temperature of compressor 100 by the spouting liquid controlling hydrojet solenoid valve 200.
Further, comprise according to the spouting liquid of the delivery temperature calculating hydrojet solenoid valve of compressor: judge whether the delivery temperature of compressor is greater than predefined value; If judge that the delivery temperature of compressor is greater than predefined value, then control hydrojet solenoid valve hydrojet; And if judge that the delivery temperature of compressor is less than predefined value, then control hydrojet solenoid valve not hydrojet.
By judging whether delivery temperature is greater than predefined value and controls hydrojet solenoid valve 200 whether hydrojet, hydrojet solenoid valve hydrojet can be controlled when delivery temperature is greater than predefined value, control hydrojet solenoid valve when delivery temperature is less than predefined value and stop hydrojet, and, spouting liquid number according to delivery temperature calculate obtain, thus, spouting liquid is controlled by the hydrojet or non-hydrojet that control hydrojet solenoid valve, avoid the loss of the refrigerating capacity caused lower than the too much hydrojet of predefined value in delivery temperature, solve in prior art and control the coarse problem of spouting liquid, and then reach the effect accurately controlling spouting liquid.
Preferably, in order to accurately control the spouting liquid of hydrojet solenoid valve 200, profit calculates the spouting liquid of hydrojet solenoid valve 200 with the following methods:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature when measuring for the K time, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
When first time detects delivery temperature and second time detects delivery temperature, controller 400 controls hydrojet solenoid valve 200 not hydrojet, therefore, Q(1)=Q(2)=0, detect delivery temperature in third time to start, if the delivery temperature that third time is detected is higher than setting value, controller 400 is according to the spouting liquid of above-mentioned formulae discovery hydrojet solenoid valve 200.Now, K value is 3, and the formula of the spouting liquid of above-mentioned calculating hydrojet solenoid valve 200 is:
Q（3）=Q（2）+Kp[△t（3）-△t（2）]+Ki*△t（3）+Kd*[△t（3）-2*△t（2）+△t（1）]
That is, after third time detection delivery temperature, controller 400 calculates the spouting liquid of hydrojet solenoid valve 200 for the third time according to the delivery temperature of first time detection and the delivery temperature of second time detection.
Wherein, △ t represents the delivery temperature of compressor and the difference of default delivery temperature, difference is less, delivery temperature and the default delivery temperature of compressor are more close, the spouting liquid then needed is also less, difference is larger, and the delivery temperature of compressor is more away from default delivery temperature, then the spouting liquid needed is also larger.
Kp, Ki and Kd obtain according to different compressor measurements, such as, during calculating K p, Ki and Kd is made to equal 0, then Kp increases gradually from 0, until concussion appears in system exhaust temperature, then from this value, Kp reduces gradually, until concussion hour, record starts the value of Kp when there is concussion as the Kp in above-mentioned formula.In like manner, can the value of calculating K i and Kd.
Therefore, the spouting liquid of the third time that the difference after the difference after detecting delivery temperature by first time and second time detect delivery temperature obtains, make spouting liquid accurately can meet the requirement reducing delivery temperature, the loss of the refrigerating capacity that hydrojet can be avoided again too much to cause.
Preferably, conveniently controlling spouting liquid, by controlling the hydrojet time controling hydrojet solenoid valve spouting liquid of hydrojet solenoid valve, utilizing the hydrojet time of following formulae discovery hydrojet solenoid valve:
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
T is one-period, can represent the time between time between adjacent twice unlatching of hydrojet solenoid valve or adjacent twice closedown, without the time lag between two cycles of continuous print.
T1 represents the opening time of hydrojet solenoid valve, T1 is the function about cycle and spouting liquid, the opening time of hydrojet solenoid valve can be obtained by the spouting liquid that calculates and cycle, compared to directly control spouting liquid number, the opening time controlling hydrojet solenoid valve is convenient and easy to control spouting liquid.
Preferably, conveniently calculate and control spouting liquid, the stopping hydrojet time of following formulae discovery hydrojet solenoid valve can be utilized:
T2=Q（k）*T，
Wherein, T2=Q(k) * T represents shut-in time of hydrojet solenoid valve, T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
T2 represents the shut-in time of hydrojet solenoid valve, T2 is the function about cycle and spouting liquid, the opening time of hydrojet solenoid valve can be obtained by the spouting liquid that calculates and cycle, compared to directly control spouting liquid number, the opening time controlling hydrojet solenoid valve is convenient and easy to control spouting liquid.
The relation of spouting liquid and hydrojet time can be expressed as Q(k)=T2/T=T2/(T1+T2), that is, the spouting liquid percentage of hydrojet time represents.
Cycle T be that time range can between 5s-60s, it is understood that the cycle is shorter, the frequency gathering delivery temperature is higher, more accurate according to the delivery temperature adjustment spouting liquid gathered.
By the shut-in time of calculating hydrojet solenoid valve or the opening time of hydrojet solenoid valve, the hydrojet time of hydrojet solenoid valve can be determined again according to cycle T, thus control spouting liquid, owing to can accurately control the hydrojet time, make delivery temperature more stable, fluctuate less, compressor operating is more steady.
Further, in order to save coolant, the loss of less refrigerating capacity, if detect continuous several cycle detection to delivery temperature be less than setting value, then control spouting liquid Q(k)=0.
The exhaust temperature control device that the delivery temperature controlling method of the embodiment of the present invention can be provided by the embodiment of the present invention performs, and the exhaust temperature control device of the embodiment of the present invention also may be used for performing the delivery temperature controlling method that the embodiment of the present invention provides.
Fig. 3 is the schematic diagram of the exhaust temperature control device according to the embodiment of the present invention.As shown in the figure, this exhaust temperature control device comprises collecting unit 10, computing unit 20 and the first control unit 30.
Collecting unit 10 is for the delivery temperature of collect and process machine.
Computing unit 20 is for calculating the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, wherein, hydrojet solenoid valve is used for the delivery temperature being reduced compressor by hydrojet.
First control unit 30 controls hydrojet solenoid valve hydrojet for the spouting liquid of the hydrojet solenoid valve by calculating.
Collecting unit 10 gathers delivery temperature, and computing unit 20 utilizes the delivery temperature of the compressor collected to calculate the spouting liquid of hydrojet solenoid valve, and the first control unit 30 controls the amplitude of variation of the delivery temperature of compressor by the spouting liquid controlling hydrojet solenoid valve.
By calculating the spouting liquid of hydrojet solenoid valve according to the delivery temperature of compressor, then control hydrojet solenoid valve hydrojet by the spouting liquid of the hydrojet solenoid valve calculated, accurately can control the spouting liquid of hydrojet solenoid valve, thus reduce the loss of refrigerating capacity.
Further, exhaust temperature control device comprises judging unit and the second control unit.Judging unit is for judging whether the delivery temperature of compressor is greater than predefined value; Second control unit is used for when judging that the delivery temperature of compressor is greater than predefined value, controls hydrojet solenoid valve hydrojet; And when judging that the delivery temperature of compressor is less than predefined value, control hydrojet solenoid valve not hydrojet.
By judging whether delivery temperature is greater than predefined value and controls hydrojet solenoid valve 200 whether hydrojet, hydrojet solenoid valve hydrojet can be controlled when delivery temperature is greater than predefined value, control hydrojet solenoid valve when delivery temperature is less than predefined value and stop hydrojet, and, spouting liquid number according to delivery temperature calculate obtain, thus, spouting liquid is controlled by the hydrojet or non-hydrojet that control hydrojet solenoid valve, avoid the loss of the refrigerating capacity caused lower than the too much hydrojet of predefined value in delivery temperature, solve in prior art and control the coarse problem of spouting liquid, and then reach the effect accurately controlling spouting liquid.
Preferably, in order to accurately control the spouting liquid of hydrojet solenoid valve 200, computing unit is used for the spouting liquid calculating hydrojet solenoid valve in the following manner:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
When first time detects delivery temperature and second time detects delivery temperature, controller 400 controls hydrojet solenoid valve 200 not hydrojet, therefore, Q(1)=Q(2)=0, detect delivery temperature in third time to start, if the delivery temperature that third time is detected is higher than setting value, controller 400 is according to the spouting liquid of above-mentioned formulae discovery hydrojet solenoid valve 200.Now, K value is 3, and the formula of the spouting liquid of above-mentioned calculating hydrojet solenoid valve 200 is:
Q（3）=Q（2）+Kp[△t（3）-△t（2）]+Ki*△t（3）+Kd*[△t（3）-2*△t（2）+△t（1）]
That is, after third time detection delivery temperature, controller 400 calculates the spouting liquid of hydrojet solenoid valve 200 for the third time according to the delivery temperature of first time detection and the delivery temperature of second time detection.
Wherein, △ t represents the delivery temperature of compressor and the difference of default delivery temperature, difference is less, delivery temperature and the default delivery temperature of compressor are more close, the spouting liquid then needed is also less, difference is larger, and the delivery temperature of compressor is more away from default delivery temperature, then the spouting liquid needed is also larger.
Kp, Ki and Kd obtain according to different compressor measurements, such as, during calculating K p, Ki and Kd is made to equal 0, then Kp increases gradually from 0, until concussion appears in system exhaust temperature, then from this value, Kp reduces gradually, until concussion hour, record starts the value of Kp when there is concussion as the Kp in above-mentioned formula.In like manner, can the value of calculating K i and Kd.
Therefore, the spouting liquid of the third time that the difference after the difference after detecting delivery temperature by first time and second time detect delivery temperature obtains, make spouting liquid accurately can meet the requirement reducing delivery temperature, the loss of the refrigerating capacity that hydrojet can be avoided again too much to cause.
Preferably, conveniently control spouting liquid, the first control unit 30 comprises control opening module, for utilizing the hydrojet time of following formulae discovery hydrojet solenoid valve:
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
T is one-period, can represent the time between time between adjacent twice unlatching of hydrojet solenoid valve or adjacent twice closedown, without the time lag between two cycles of continuous print.
T1 represents the opening time of hydrojet solenoid valve, T1 is the function about cycle and spouting liquid, the opening time of hydrojet solenoid valve can be obtained by the spouting liquid that calculates and cycle, compared to directly control spouting liquid number, the opening time controlling hydrojet solenoid valve is convenient and easy to control spouting liquid.
Preferably, conveniently calculate and control spouting liquid, the first control unit 30 comprises control closing module, for utilizing the stopping hydrojet time of following formulae discovery hydrojet solenoid valve:
T2=Q（k）*T，
Wherein, T2 represents the shut-in time of hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
T2=Q（k）*T，
Wherein, T2=Q(k) * T represents shut-in time of hydrojet solenoid valve, T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
T2 represents the shut-in time of hydrojet solenoid valve, T2 is the function about cycle and spouting liquid, the opening time of hydrojet solenoid valve can be obtained by the spouting liquid that calculates and cycle, compared to directly control spouting liquid number, the opening time controlling hydrojet solenoid valve is convenient and easy to control spouting liquid.
The relation of spouting liquid and hydrojet time can be expressed as Q(k)=T2/T=T2/(T1+T2), that is, the spouting liquid percentage of hydrojet time represents.
Cycle T be that time range can between 5s-60s, it is understood that the cycle is shorter, the frequency gathering delivery temperature is higher, more accurate according to the delivery temperature adjustment spouting liquid gathered.
By the shut-in time of calculating hydrojet solenoid valve or the opening time of hydrojet solenoid valve, the hydrojet time of hydrojet solenoid valve can be determined again according to cycle T, thus control spouting liquid, owing to can accurately control the hydrojet time, make delivery temperature more stable, fluctuate less, compressor operating is more steady.
Further, in order to save coolant, the loss of less refrigerating capacity, if detect continuous several cycle detection to delivery temperature be less than setting value, then control spouting liquid Q(k)=0.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a delivery temperature controlling method for compressor, is characterized in that, comprising:
The delivery temperature of collect and process machine;
Calculate the spouting liquid of hydrojet solenoid valve according to the delivery temperature of described compressor, wherein, described hydrojet solenoid valve is used for the delivery temperature being reduced described compressor by hydrojet; And
Described hydrojet solenoid valve hydrojet is controlled by the spouting liquid of the described hydrojet solenoid valve calculated.
2. delivery temperature controlling method according to claim 1, is characterized in that, after the delivery temperature of collect and process machine, described delivery temperature controlling method also comprises:
Judge whether the delivery temperature of described compressor is greater than predefined value;
If judge that the delivery temperature of described compressor is greater than predefined value, then control described hydrojet solenoid valve hydrojet;
And
If judge that the delivery temperature of described compressor is less than predefined value, then control described hydrojet solenoid valve not hydrojet.
3. delivery temperature controlling method according to claim 1, is characterized in that, the spouting liquid calculating hydrojet solenoid valve according to the delivery temperature of described compressor comprises:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature when measuring for the K time, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
4. delivery temperature controlling method according to claim 1, is characterized in that, controls described hydrojet solenoid valve hydrojet comprise by the spouting liquid of the described hydrojet solenoid valve calculated:
Utilize the hydrojet time of hydrojet solenoid valve described in following formulae discovery
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of described hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
5. delivery temperature controlling method according to claim 1, is characterized in that, controls described hydrojet solenoid valve hydrojet comprise by the spouting liquid of the described hydrojet solenoid valve calculated:
Utilize the stopping hydrojet time of hydrojet solenoid valve described in following formulae discovery
T2=Q（k）*T，
Wherein, T2=Q(k) * T represents shut-in time of described hydrojet solenoid valve, T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
6. the delivery temperature controlling method according to claim 4 or 5, is characterized in that,
The delivery temperature of collect and process machine comprises: gather the first delivery temperature and the second delivery temperature, wherein, gathering described first delivery temperature with the interval time of described second delivery temperature of collection is T, described first delivery temperature and described second delivery temperature are the adjacent delivery temperature collected for twice
The spouting liquid calculating hydrojet solenoid valve according to the delivery temperature of described compressor comprises: utilize described first delivery temperature and described second delivery temperature to calculate the spouting liquid of described hydrojet solenoid valve.
7. an exhaust temperature control device for compressor, is characterized in that,
Collecting unit, for the delivery temperature of collect and process machine;
Computing unit, for calculating the spouting liquid of hydrojet solenoid valve according to the delivery temperature of described compressor, wherein, described hydrojet solenoid valve is used for the delivery temperature being reduced described compressor by hydrojet; And
First control unit, the spouting liquid for the described hydrojet solenoid valve by calculating controls described hydrojet solenoid valve hydrojet.
8. exhaust temperature control device according to claim 7, is characterized in that, described exhaust temperature control device also comprises:
Judging unit, for after the delivery temperature of collect and process machine, judges whether the delivery temperature of described compressor is greater than predefined value;
Second control unit, for when judging that the delivery temperature of described compressor is greater than predefined value, controls described hydrojet solenoid valve hydrojet; And when judging that the delivery temperature of described compressor is less than predefined value, control described hydrojet solenoid valve not hydrojet.
9. exhaust temperature control device according to claim 7, is characterized in that, the spouting liquid that described computing unit is used for calculating in the following manner hydrojet solenoid valve comprises:
Q（k）=Q（k-1）+Kp[△t（k）-△t（k-1）]+Ki*△t（k）+Kd*[△t（k）-2*△t（k-1）+△t（k-2）]，
Wherein, Q(k) spouting liquid when kth time is measured is represented, △ t(k) represent the delivery temperature of compressor and the difference of default delivery temperature when measuring for the K time, Kp, Ki and Kd are preset constant, Q(1)=Q(2)=0, Q(1) represent first time measure time spouting liquid, Q(2) represent second time measure time spouting liquid.
10. exhaust temperature control device according to claim 7, is characterized in that, described first control unit comprises control opening module, and described control opening module is for utilizing the hydrojet time of hydrojet solenoid valve described in following formulae discovery:
T1=（1-Q（k））*T，
Wherein, T1 represents the opening time of described hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
11. exhaust temperature control devices according to claim 7, is characterized in that, described first control unit comprises control closing module, and described control closing module is for utilizing the stopping hydrojet time of hydrojet solenoid valve described in following formulae discovery:
T2=Q（k）*T，
Wherein, T2 represents the shut-in time of described hydrojet solenoid valve, and T represents the adjacent hydrojet time and stops the summation of hydrojet time, Q(k) represent the spouting liquid that kth time is measured.
12. exhaust temperature control devices according to claim 10 or 11, is characterized in that,
Described collecting unit is for gathering the first delivery temperature and the second delivery temperature, wherein, gathering described first delivery temperature with the interval time of described second delivery temperature of collection is T, and described first delivery temperature and described second delivery temperature are the adjacent delivery temperature collected for twice
The spouting liquid of described computing unit also for utilizing described first delivery temperature and described second delivery temperature to calculate described hydrojet solenoid valve.
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