CN104595171A - Compressor as well as low-pressure protection control method and low-pressure protection control device thereof - Google Patents
Compressor as well as low-pressure protection control method and low-pressure protection control device thereof Download PDFInfo
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Abstract
The invention provides a compressor as well as a low-pressure protection control method and a low-pressure protection control device thereof. The low-pressure protection control method for the compressor comprises the following steps: detecting target pressure; obtaining start-up duration of the compressor; comparing the start-up duration with preset duration; when the start-up duration is smaller than the preset duration, judging whether the target pressure is smaller than first preset pressure or not; when the start-up duration is larger than or equal to the preset duration, judging whether target pressure is smaller than second preset pressure or not, wherein the second preset pressure is larger than the first preset pressure; when the target pressure is judged to be smaller than the first preset pressure, or the target pressure is judged to be smaller than the second preset pressure, sending a switch-off order to the compressor. According to the low-pressure protection control method for the compressor, a problem that the compressor is easily damaged in the low-pressure protection control method for the compressor in the prior art is solved, the operation stability of the compressor is guaranteed, and the service life of the compressor is prolonged.
Description
Technical field
The present invention relates to compressor field, in particular to a kind of compressor and low-voltage variation controlling method thereof and device.
Background technique
At present, the low-voltage variation logic of most compressor is all controlled by pressure switch, and because compressor is from shutting down in the process that starts, pressure can be lower, and pressure switch can disconnect, and usually can take the process that shielding low-voltage is protected in this period.
This control mode has certain risk; if really there is the demand of compressor low-voltage variation, then owing to taking the control mode of shielding low-voltage protection, will cause cannot playing a protective role to compressor; easily cause compressor damage, shorten the working life of compressor.
Low-voltage variation controlling method for compressor in prior art easily causes the problem of compressor damage, not yet proposes effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of compressor and low-voltage variation controlling method thereof and device, easily causes the problem of compressor damage with the low-voltage variation controlling method solving compressor in prior art.
To achieve these goals, according to an aspect of the embodiment of the present invention, a kind of low-voltage variation controlling method of compressor is provided.
Low-voltage variation controlling method according to compressor of the present invention comprises: detect goal pressure, wherein, described goal pressure is the package pressure of described compressor or the low pressure of described compressor; Obtain the unlatching duration of described compressor; The size of more described unlatching duration and preset duration; When comparing described unlatching duration and being less than described preset duration, judge whether described goal pressure is less than the first preset pressure; When comparing described unlatching duration and being more than or equal to described preset duration, judge whether described goal pressure is less than the second preset pressure, wherein, described second preset pressure is greater than described first preset pressure; And judging that described goal pressure is less than described first preset pressure, or when judging that described goal pressure is less than described second preset pressure, send out code to described compressor.
Further, described first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of described pressure lpx1, before judging whether described goal pressure is less than the first preset pressure, described low-voltage variation controlling method also comprises: detect the ambient temperature residing for described compressor, judges whether described goal pressure is less than the first preset pressure and comprises: the size of more described ambient temperature and the first preset temperature; When comparing described ambient temperature and being greater than described first preset temperature, judge whether described goal pressure is less than described pressure lpx1; And when comparing described ambient temperature and being less than or equal to described first preset temperature, judge whether described goal pressure is less than described pressure lpx2, wherein, judging that described goal pressure is less than described pressure lpx1, or when judging that described goal pressure is less than described pressure lpx2, determine that described goal pressure is less than described first preset pressure.
Further, described low-voltage variation controlling method also comprises: before the unlatching duration obtaining described compressor, obtain the on off state of described compressor, wherein, when described on off state represents open state, obtain described unlatching duration; When described on off state represents off-mode, judge whether described goal pressure is less than the 3rd preset pressure; And when judging that described goal pressure is less than described 3rd preset pressure, send described out code to described compressor.
Further, described 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of described pressure lpx3, before judging whether described goal pressure is less than the 3rd preset pressure, described low-voltage variation controlling method also comprises: detect the ambient temperature residing for described compressor, judges whether described goal pressure is less than the 3rd preset pressure and comprises: the size of more described ambient temperature and the second preset temperature; When comparing described ambient temperature and being less than or equal to described second preset temperature, judge whether described goal pressure is less than described pressure lpx3; And when comparing described ambient temperature and being greater than described second preset temperature, judge whether described goal pressure is less than described pressure lpx4, wherein, judging that described goal pressure is less than described pressure lpx3, or when judging that described goal pressure is less than described pressure lpx4, determine that described goal pressure is less than described 3rd preset pressure.
Further, described low-voltage variation controlling method also comprises: before the on off state obtaining described compressor, judge whether target controller sends start-up command to described compressor, wherein, when judging that described target controller sends described start-up command to described compressor, obtain described on off state, described target controller is the controller controlling described compressor; When judging that described target controller does not send described start-up command to described compressor, judge whether described goal pressure is less than described first preset pressure or described 3rd preset pressure; And when judging that described goal pressure is less than described first preset pressure or described 3rd preset pressure, send described out code to described compressor.
Further, described low-voltage variation controlling method also comprises: judge whether described goal pressure is less than the 4th preset pressure, wherein, when judging that described goal pressure is more than or equal to described 4th preset pressure, judge whether target controller sends start-up command to described compressor; And when judging that described goal pressure is less than described 4th preset pressure, send described out code to described compressor.
To achieve these goals, according to the another aspect of the embodiment of the present invention, provide a kind of low-voltage variation control gear of compressor.
Low-voltage variation control gear according to compressor of the present invention comprises: the first detection unit, and for detecting goal pressure, wherein, described goal pressure is the package pressure of described compressor or the low pressure of described compressor; First acquiring unit, for obtaining the unlatching duration of described compressor; Comparing unit, for the size of more described unlatching duration and preset duration; First judging unit, for when comparing described unlatching duration and being less than described preset duration, judges whether described goal pressure is less than the first preset pressure; Second judging unit, for when comparing described unlatching duration and being more than or equal to described preset duration, judges whether described goal pressure is less than the second preset pressure, and wherein, described second preset pressure is greater than described first preset pressure; And first transmitting element, for judging that described goal pressure is less than described first preset pressure, or when judging that described goal pressure is less than described second preset pressure, sending out code to described compressor.
Further, described first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of described pressure lpx1, described low-voltage variation control gear also comprises: the second detection unit, before judging whether described goal pressure is less than the first preset pressure at described first judging unit, detect the ambient temperature residing for described compressor, described first judging unit comprises: the first comparison module, for the size of more described ambient temperature and the first preset temperature; First judge module, for when comparing described ambient temperature and being greater than described first preset temperature, judges whether described goal pressure is less than described pressure lpx1; And second judge module, for when comparing described ambient temperature and being less than or equal to described first preset temperature, judge whether described goal pressure is less than described pressure lpx2, wherein, judging that described goal pressure is less than described pressure lpx1, or when judging that described goal pressure is less than described pressure lpx2, determine that described goal pressure is less than described first preset pressure.
Further, described low-voltage variation control gear also comprises: second acquisition unit, for before the unlatching duration obtaining described compressor, obtain the on off state of described compressor, wherein, when described on off state represents open state, obtain described unlatching duration; 3rd judging unit, for when described on off state represents off-mode, judges whether described goal pressure is less than the 3rd preset pressure; And second transmitting element, for when judging that described goal pressure is less than described 3rd preset pressure, send described out code to described compressor.
Further, described 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of described pressure lpx3, described low-voltage variation control gear also comprises: the 3rd detection unit, for before judging whether described goal pressure is less than the 3rd preset pressure, detect the ambient temperature residing for described compressor, described 3rd judging unit comprises: the second comparison module, for the size of more described ambient temperature and the second preset temperature; 3rd judge module, for when comparing described ambient temperature and being less than or equal to described second preset temperature, judges whether described goal pressure is less than described pressure lpx3; And the 4th judge module, for when comparing described ambient temperature and being greater than described second preset temperature, judge whether described goal pressure is less than described pressure lpx4, wherein, judging that described goal pressure is less than described pressure lpx3, or when judging that described goal pressure is less than described pressure lpx4, determine that described goal pressure is less than described 3rd preset pressure.
Further, described low-voltage variation control gear also comprises: the 4th judging unit, for obtain described compressor at described second acquisition unit on off state before, judge whether target controller sends start-up command to described compressor, wherein, when described 4th judging unit judges that described target controller sends described start-up command to described compressor, described second acquisition unit obtains described on off state, and described target controller is the controller controlling described compressor; 5th judging unit, when described 4th judging unit judges that described target controller does not send described start-up command to described compressor, judges whether described goal pressure is less than described first preset pressure or described 3rd preset pressure; And the 3rd transmitting element, when judging that described goal pressure is less than described first preset pressure or described 3rd preset pressure, send described out code to described compressor.
Further, described low-voltage variation control gear also comprises: the 6th judging unit, for judging whether described goal pressure is less than the 4th preset pressure, wherein, when judging that described goal pressure is more than or equal to described 4th preset pressure, described 4th judging unit judges whether target controller sends start-up command to described compressor; And the 4th transmitting element, for when judging that described goal pressure is less than described 4th preset pressure, send described out code to described compressor.
To achieve these goals, according to the another aspect of the embodiment of the present invention, provide a kind of compressor.
Compressor according to the present invention comprise that foregoing provides any one described in the low-voltage variation control gear of compressor.
According to inventive embodiments, adopt and detect goal pressure, wherein, described goal pressure is the package pressure of described compressor or the low pressure of described compressor; Obtain the unlatching duration of described compressor; The size of more described unlatching duration and preset duration; When comparing described unlatching duration and being less than described preset duration, judge whether described goal pressure is less than the first preset pressure; When comparing described unlatching duration and being more than or equal to described preset duration, judge whether described goal pressure is less than the second preset pressure, wherein, described second preset pressure is greater than described first preset pressure; And judging that described goal pressure is less than described first preset pressure, or when judging that described goal pressure is less than described second preset pressure, send out code to described compressor.By obtaining the unlatching duration of compressor, and compare the size of opening duration and preset duration, when different operationally, take different preset pressure values as low-voltage variation value as the basis of compressor being carried out to low-voltage variation, achieve and take classification processing mode to carry out low-voltage variation to compressor, in compressor start process, low-voltage variation value arranges lower, after compressor operating a period of time, low-voltage variation value arranges relatively larger, to determine to carry out low-voltage variation to compressor at any time, the drawback cannot protected compressor avoiding the control mode taking shielding low-voltage to protect in prior art to cause, the low-voltage variation controlling method solving compressor in prior art easily causes the problem of compressor damage, reach the reliability ensureing compressor operating, improve the effect in compressor working life.
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 flow chart of the low-voltage variation controlling method of compressor according to the embodiment of the present invention;
Fig. 2 is the flow chart of the low-voltage variation controlling method of compressor according to the preferred embodiment of the invention; And
Fig. 3 is the schematic diagram of the low-voltage variation control gear of compressor according to the embodiment of the present invention.
Embodiment
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.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiment 1
According to the embodiment of the present invention, provide a kind of embodiment of the method that may be used for implementing the application's device embodiment, 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, in some cases, can be different from the step shown or described by order execution herein.
According to the embodiment of the present invention, provide a kind of low-voltage variation controlling method of compressor.Fig. 1 is the flow chart of the low-voltage variation controlling method of compressor according to the embodiment of the present invention, and as shown in Figure 1, the method comprises following step S102 to step S112:
S102: detect goal pressure, wherein, goal pressure is the package pressure of compressor or the low pressure of compressor, and this step namely detects the package pressure of compressor or the low pressure of compressor.
S104: the unlatching duration obtaining compressor, wherein, the unlatching duration of compressor i.e. the operation duration of compressor.
S106: compare the size of opening duration and preset duration, in embodiments of the present invention, preset duration can be 60S.
S108: when comparing unlatching duration and being less than preset duration, judge whether goal pressure is less than the first preset pressure.
S110: when comparing unlatching duration and being more than or equal to preset duration, judge whether goal pressure is less than the second preset pressure, wherein, the second preset pressure is greater than the first preset pressure, and in embodiments of the present invention, the second preset pressure can be 220KP.
S112: judging that goal pressure is less than the first preset pressure, or when judging that goal pressure is less than the second preset pressure, send out code to compressor, namely judging that goal pressure is less than the first preset pressure, or when judging that goal pressure is less than the second preset pressure, controlling compressor and closing.
In embodiments of the present invention, by obtaining the unlatching duration of compressor, and compare the size of opening duration and preset duration, when different operationally, take different preset pressure values as low-voltage variation value as the basis of compressor being carried out to low-voltage variation, achieve and take classification processing mode to carry out low-voltage variation to compressor, in compressor start process, low-voltage variation value arranges lower, after compressor operating a period of time, low-voltage variation value arranges relatively larger, to determine to carry out low-voltage variation to compressor at any time, the drawback cannot protected compressor avoiding the control mode taking shielding low-voltage to protect in prior art to cause, the low-voltage variation controlling method solving compressor in prior art easily causes the problem of compressor damage, reach the reliability ensureing compressor operating, improve the effect in compressor working life.
Preferably; first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of pressure lpx1; wherein; lpx1 can be 170KP; lpx2 can be 130KP; before judging whether goal pressure is less than the first preset pressure, the low-voltage variation controlling method of the compressor that the embodiment of the present invention provides also comprises:
Detect the ambient temperature residing for compressor, particularly, while detection goal pressure, the detection of ambient temperature can be carried out.
Now, judge whether goal pressure is less than the first preset pressure and comprises: the size comparing ambient temperature and the first preset temperature; When comparing ambient temperature and being greater than the first preset temperature, judge whether goal pressure is less than pressure lpx1; When comparing ambient temperature and being less than or equal to the first preset temperature, judge whether goal pressure is less than pressure lpx2, wherein, judging that goal pressure is less than pressure lpx1, or when judging that goal pressure is less than pressure lpx2, determine that goal pressure is less than the first preset pressure, namely judging that goal pressure is less than pressure lpx1, or when judging that goal pressure is less than pressure lpx2, control compressor and close.
In embodiments of the present invention, when compressor is in open state, utilizes the first preset temperature starting low-voltage variation to carry out the judgement of pressure size as temperature trip point, reach the effect of the validity improving compressor low-voltage variation.
Preferably, the low-voltage variation controlling method of the compressor provided in the embodiment of the present invention also comprises:
Before the unlatching duration obtaining compressor, obtain the on off state of compressor, wherein, when on off state represents open state, obtain and open duration, namely obtain the operation duration that compressor is in open state.
When on off state represents off-mode, judge whether goal pressure is less than the 3rd preset pressure, namely, when judging that compressor is in off-mode, the magnitude relationship of comparison object pressure and the 3rd preset pressure.
When judging that goal pressure is less than the 3rd preset pressure, send out code to compressor, that is, when judging that goal pressure is less than the 3rd preset pressure, controlling compressor and closing.
In embodiments of the present invention; by obtaining the on off state of compressor; when making compressor be in open state or off-mode, utilize value and the actual goal pressure detected based on different force value to contrast respectively, reach the effect of the validity improving low-voltage variation.
Preferably; 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of pressure lpx3; wherein; lpx3 can be 120KP; lpx4 can be 240KP; before judging whether goal pressure is less than the 3rd preset pressure, the low-voltage variation controlling method of the compressor that the embodiment of the present invention provides also comprises:
Detect the ambient temperature residing for compressor, particularly, while detection goal pressure, the detection of ambient temperature can be carried out.
Now, judge whether goal pressure is less than the 3rd preset pressure and comprises: the size comparing ambient temperature and the second preset temperature; When comparing ambient temperature and being less than or equal to the second preset temperature, judge whether goal pressure is less than pressure lpx3; When comparing ambient temperature and being greater than the second preset temperature, judge whether goal pressure is less than pressure lpx4, wherein, judging that goal pressure is less than pressure lpx3, or when judging that goal pressure is less than pressure lpx4, determine that goal pressure is less than the 3rd preset pressure.In embodiments of the present invention, judging that goal pressure is less than pressure lpx3, or when judging that goal pressure is less than pressure lpx4, controlling compressor and close.
In embodiments of the present invention, when compressor is in standby or outage state, utilizes the second preset temperature starting low-voltage variation to carry out the judgement of pressure size as temperature trip point, reach the effect of the validity improving low-voltage variation.
Particularly, the low-voltage variation controlling method of the compressor provided in the embodiment of the present invention also comprises: before the on off state obtaining compressor, judge whether target controller sends start-up command to compressor, wherein, when judging that target controller sends start-up command to compressor again, obtain on off state, target controller is the controller controlling compressor; When judging that target controller does not send start-up command to compressor, judge whether goal pressure is less than the first preset pressure or the 3rd preset pressure, namely judge whether goal pressure is less than in pressure lpx1 and pressure lpx2 arbitrary pressure in arbitrary pressure or pressure lpx3 and pressure lpx4; When judging that goal pressure is less than the first preset pressure or the 3rd preset pressure, send out code to compressor, namely, when judging that goal pressure to be less than in pressure lpx1 and pressure lpx2 arbitrary pressure in arbitrary pressure or pressure lpx3 and pressure lpx4, controlling compressor and closing.
Particularly, the low-voltage variation controlling method of the compressor provided in the embodiment of the present invention also comprises: judge whether goal pressure is less than the 4th preset pressure, wherein, when judging that goal pressure is more than or equal to the 4th preset pressure, judge whether target controller sends start-up command to compressor, 4th preset pressure is less than any one preset pressure value above-mentioned, namely, 4th preset pressure is a minimum force value, in embodiments of the present invention, the 4th preset pressure can be 100KP; When judging that goal pressure is less than the 4th preset pressure, sending out code to compressor, namely, when judging that goal pressure is less than the 4th preset pressure, controlling compressor and closing.
Fig. 2 is the flow chart of the low-voltage variation controlling method of a kind of preferred compressor according to the embodiment of the present invention, and as shown in Figure 2, the method comprises following step S202 to step S228:
S202: detect goal pressure, same, goal pressure is the package pressure of compressor or the low pressure of compressor.
S204: judge that whether goal pressure is lower than pressure lpless, wherein, pressure lpless represents the 4th preset pressure.When judging goal pressure lower than pressure lpless, perform step S206; When judging goal pressure higher than lpless, perform step S208.
S206: close compressor.
S208: judge whether manual operating device sends power-on command, this step is specially and judges whether manual operating device sends power-on command to compressor, and manual operating device is herein the target controller in above-described embodiment.When judging that manual operating device sends power-on command to compressor, perform step S212; When judging that manual operating device does not send power-on command to compressor, perform step S210.
S210: judge whether goal pressure is less than pressure Lpx1, pressure Lpx2, pressure Lpx3 or pressure Lpx4, this step is specially and judges whether goal pressure is less than arbitrary pressure in pressure Lpx1, pressure Lpx2, pressure Lpx3 and pressure Lpx4, when judging whether goal pressure is less than arbitrary pressure in pressure Lpx1, pressure Lpx2, pressure Lpx3 and pressure Lpx4, perform step S206.Wherein, pressure Lpx1 and pressure Lpx2 forms the first preset pressure, and pressure Lpx3 and pressure Lpx4 forms the second preset pressure.
S212: judge whether compressor is opened, namely judges whether compressor is in open state, when judging that compressor is in open state, performs step S214; When judging that compressor is in non-open state, perform step S224.
S214: judge whether the compressor opening time is less than ts, wherein, ts is the preset duration in above-described embodiment, in embodiments of the present invention, can be 60S, this step namely judges whether the operation of compressor reaches preset duration, when judging that the working time of compressor reaches preset duration, performs step S222; When judging that the working time of compressor does not reach preset duration, perform step S216.
S216: judge whether ambient temperature is greater than T1, wherein, T1 is the first preset temperature, and in embodiments of the present invention, T1 can be-5 DEG C.Particularly, the ambient temperature of ambient temperature residing for compressor, while detection goal pressure, can detect the ambient temperature residing for compressor.This step is specially, and judges whether ambient temperature is greater than the first preset temperature, when judging that ambient temperature is greater than the first preset temperature, performs step S218; When judging that ambient temperature is less than or equal to the first preset temperature, perform step S220.
S218: judge whether goal pressure is less than pressure Lpx1, namely, judges whether goal pressure is less than the pressure Lpx1 in the first preset pressure, when judging the pressure Lpx1 that goal pressure is less than in the first preset pressure, performs step S206; When judging the pressure Lpx1 that goal pressure is greater than or equal in the first preset pressure, return step S212.
S220: judge whether goal pressure is less than pressure Lpx2, namely, judges whether goal pressure is less than the pressure Lpx2 in the first preset pressure, when judging the pressure Lpx2 that goal pressure is less than in the first preset pressure, performs step S206; When judging the pressure Lpx2 that goal pressure is greater than or equal in the first preset pressure, return step S212.
S222: judge whether goal pressure is less than pressure lpp, wherein, pressure lpp is the second preset pressure.When judging that goal pressure is less than pressure lpp, perform step S206; When judging that goal pressure is greater than or equal to pressure lpp, return step S212.
S224: judge whether ambient temperature is greater than T2, wherein, T2 is the second preset temperature, and in embodiments of the present invention, T2 can be 10 DEG C.When ambient temperature is greater than T2, perform step S226; When ambient temperature is less than or equal to T2, perform step S228.
S226: judge whether goal pressure is less than pressure Lpx4, namely, judges whether goal pressure is less than the pressure Lpx4 in the 3rd preset pressure, when judging the pressure Lpx4 that goal pressure is less than in the 3rd preset pressure, performs step S226; When judging the pressure Lpx4 that goal pressure is greater than or equal in the 3rd preset pressure, return step S212.
S228: judge whether goal pressure is less than pressure Lpx3, namely, judges whether goal pressure is less than the pressure Lpx3 in the 3rd preset pressure, when judging the pressure Lpx3 that goal pressure is less than in the 3rd preset pressure, performs step S226; When judging the pressure Lpx3 that goal pressure is greater than or equal in the 3rd preset pressure, return step S212.
The low-voltage variation controlling method of the compressor that the preferred embodiment of the present invention provides, classification is carried out to compressor low-voltage variation, in compressor start process, low-voltage variation value arranges lower, after compressor operating a period of time, low-voltage variation value arranges more relatively large, and, when compressor cuts out, the low-voltage variation value of compressor is also arranged to different, simultaneously, for avoiding occurring abnormal conditions, also be provided with minimum protection value, and when the goal pressure detected reaches minimum protection value, send out code to compressor and control compressor closedown, to carry out low-voltage variation to compressor, achieve the validity farthest improving compressor low-voltage variation.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that can add required general hardware platform by software according to the method for above-described embodiment and realize, hardware can certainly be passed through, but in a lot of situation, the former is better mode of execution.Based on such understanding, technological scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
Embodiment 2
According to the embodiment of the present invention; additionally provide a kind of low-voltage variation control gear of compressor of low-voltage variation controlling method of compressor; this control gear is mainly used in the controlling method that execution embodiment of the present invention foregoing provides, and does concrete introduction below to the low-voltage variation control gear of the compressor that the embodiment of the present invention provides:
Fig. 3 is the schematic diagram of the low-voltage variation control gear of compressor according to the embodiment of the present invention; as shown in Figure 3; this device mainly comprises the first detection unit 10, first acquiring unit 20, comparing unit 30, first judging unit 40, second judging unit 50 and the first transmitting element 60, wherein:
First detection unit 10 is for detecting goal pressure, and wherein, goal pressure is the package pressure of compressor or the low pressure of compressor, and this unit namely detects the package pressure of compressor or the low pressure of compressor.
First acquiring unit 20 for obtaining the unlatching duration of compressor, wherein, the unlatching duration of compressor i.e. the operation duration of compressor.
Comparing unit 30 opens the size of duration and preset duration for comparing, in embodiments of the present invention, preset duration can be 60S.
First judging unit 40, for when comparing unlatching duration and being less than preset duration, judges whether goal pressure is less than the first preset pressure.
Second judging unit 50 is for when comparing unlatching duration and being more than or equal to preset duration, judge whether goal pressure is less than the second preset pressure, wherein, the second preset pressure is greater than the first preset pressure, in embodiments of the present invention, the second preset pressure can be 220KP.
First transmitting element 60 is for judging that goal pressure is less than the first preset pressure, or when judging that goal pressure is less than the second preset pressure, send out code to compressor, namely judging that goal pressure is less than the first preset pressure, or when judging that goal pressure is less than the second preset pressure, controlling compressor and closing.
In embodiments of the present invention, by obtaining the unlatching duration of compressor, and compare the size of opening duration and preset duration, when different operationally, take different preset pressure values as low-voltage variation value as the basis of compressor being carried out to low-voltage variation, achieve and take classification processing mode to carry out low-voltage variation to compressor, in compressor start process, low-voltage variation value arranges lower, after compressor operating a period of time, low-voltage variation value arranges relatively larger, to determine to carry out low-voltage variation to compressor at any time, the drawback cannot protected compressor avoiding the control mode taking shielding low-voltage to protect in prior art to cause, the low-voltage variation controlling method solving compressor in prior art easily causes the problem of compressor damage, reach the reliability ensureing compressor operating, improve the effect in compressor working life.
Preferably; first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of pressure lpx1; wherein; lpx1 can be 170KP; lpx2 can be 130KP, and the low-voltage variation control gear of the compressor that the embodiment of the present invention provides also comprises the second detection unit, wherein; second detection unit was used for before the first judging unit judges whether goal pressure is less than the first preset pressure, detected the ambient temperature residing for compressor.
Now, the first judging unit 40 comprises the first comparison module, the first judge module and the second judge module, and wherein, the first comparison module is for comparing the size of ambient temperature and the first preset temperature; First judge module is used for when comparing ambient temperature and being greater than the first preset temperature, judges whether goal pressure is less than pressure lpx1; Second judge module, for when comparing ambient temperature and being less than or equal to the first preset temperature, judge whether goal pressure is less than pressure lpx2, wherein, judging that goal pressure is less than pressure lpx1, or when judging that goal pressure is less than pressure lpx2, determine that goal pressure is less than the first preset pressure, namely judging that goal pressure is less than pressure lpx1, or when judging that goal pressure is less than pressure lpx2, controlling compressor and close.
In embodiments of the present invention, when compressor is in open state, utilizes the first preset temperature starting low-voltage variation to carry out the judgement of pressure size as temperature trip point, reach the effect of the validity improving compressor low-voltage variation.
Preferably, the low-voltage variation control gear of the compressor that the embodiment of the present invention provides also comprises second acquisition unit, the 3rd judging unit and the second transmitting element, wherein:
Second acquisition unit is used for, before the unlatching duration obtaining compressor, obtaining the on off state of compressor, wherein, when on off state represents open state, obtains and opens duration, namely obtains the operation duration that compressor is in open state.
3rd judging unit is used for when on off state represents off-mode, judges whether goal pressure is less than the 3rd preset pressure, namely, when judging that compressor is in off-mode, and the magnitude relationship of comparison object pressure and the 3rd preset pressure.
Second transmitting element is used for when judging that goal pressure is less than the 3rd preset pressure, sends out code to compressor, that is, when judging that goal pressure is less than the 3rd preset pressure, controlling compressor and closing.
In embodiments of the present invention; by obtaining the on off state of compressor; when making compressor be in open state or off-mode, utilize value and the actual goal pressure detected based on different force value to contrast respectively, reach the effect of the validity improving low-voltage variation.
Preferably; 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of pressure lpx3, and wherein, lpx3 can be 120KP; lpx4 can be 240KP; the low-voltage variation control gear of the compressor that the embodiment of the present invention provides also comprises the 3rd detection unit, and wherein, the 3rd detection unit was used for before judging whether goal pressure is less than the 3rd preset pressure; detect the ambient temperature residing for compressor; particularly, while detection goal pressure, the detection of ambient temperature can be carried out.
Now, the 3rd judging unit comprises the second comparison module, the 3rd judge module and the 4th judge module, and wherein, the second comparison module is for comparing the size of ambient temperature and the second preset temperature; 3rd judge module is used for when comparing ambient temperature and being less than or equal to the second preset temperature, judges whether goal pressure is less than pressure lpx3; 4th judge module is used for when comparing ambient temperature and being greater than the second preset temperature, judge whether goal pressure is less than pressure lpx4, wherein, judging that goal pressure is less than pressure lpx3, or when judging that goal pressure is less than pressure lpx4, determine that goal pressure is less than the 3rd preset pressure.In embodiments of the present invention, judging that goal pressure is less than pressure lpx3, or when judging that goal pressure is less than pressure lpx4, controlling compressor and close.
In embodiments of the present invention, when compressor is in standby or outage state, utilizes the second preset temperature starting low-voltage variation to carry out the judgement of pressure size as temperature trip point, reach the effect of the validity improving low-voltage variation.
Particularly, the low-voltage variation control gear of the compressor provided in the embodiment of the present invention also comprises the 4th judging unit, the 5th judging unit and the 3rd transmitting element, wherein, 4th judging unit is used for before second acquisition unit obtains the on off state of compressor, judge whether target controller sends start-up command to compressor, wherein, when the 4th judging unit judges that target controller sends start-up command to compressor, second acquisition unit obtains on off state, and target controller is the controller controlling compressor; 5th judging unit, when the 4th judging unit judges that target controller does not send start-up command to compressor, judge whether goal pressure is less than the first preset pressure or the 3rd preset pressure, namely judge whether goal pressure is less than in pressure lpx1 and pressure lpx2 arbitrary pressure in arbitrary pressure or pressure lpx3 and pressure lpx4; 3rd transmitting element is when judging that goal pressure is less than the first preset pressure or the 3rd preset pressure, namely, when judging that goal pressure to be less than in pressure lpx1 and pressure lpx2 arbitrary pressure in arbitrary pressure or pressure lpx3 and pressure lpx4, controlling compressor and closing.
Particularly, the low-voltage variation control gear of the compressor provided in the embodiment of the present invention also comprises the 6th judging unit, wherein, 6th judging unit is for judging whether goal pressure is less than the 4th preset pressure, wherein, when judging that goal pressure is more than or equal to the 4th preset pressure, 4th judging unit judges whether target controller sends start-up command to compressor, 4th preset pressure is less than any one preset pressure value above-mentioned, namely, 4th preset pressure is a minimum force value, in embodiments of the present invention, 4th preset pressure can be 100KP, 4th transmitting element is used for when judging that goal pressure is less than the 4th preset pressure, send out code to compressor, namely, when judging that goal pressure is less than the 4th preset pressure, control compressor cuts out.
In addition, the embodiment of the present invention additionally provides a kind of compressor, and this compressor comprises the low-voltage variation control gear of any one compressor that embodiment of the present invention foregoing provides.
As can be seen from the above description, the low-voltage variation controlling method that the invention solves compressor in prior art easily causes the problem of compressor damage, reaches the reliability ensureing compressor operating, the effect improving compressor working life.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed client end, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logical function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the INDIRECT COUPLING of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technological scheme of the present invention contributes to prior art in essence in other words or all or part of of this technological scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a low-voltage variation controlling method for compressor, is characterized in that, comprising:
Detect goal pressure, wherein, described goal pressure is the package pressure of described compressor or the low pressure of described compressor;
Obtain the unlatching duration of described compressor;
The size of more described unlatching duration and preset duration;
When comparing described unlatching duration and being less than described preset duration, judge whether described goal pressure is less than the first preset pressure;
When comparing described unlatching duration and being more than or equal to described preset duration, judge whether described goal pressure is less than the second preset pressure, wherein, described second preset pressure is greater than described first preset pressure; And
Judging that described goal pressure is less than described first preset pressure, or when judging that described goal pressure is less than described second preset pressure, sending out code to described compressor.
2. low-voltage variation controlling method according to claim 1; it is characterized in that; described first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of described pressure lpx1, and before judging whether described goal pressure is less than the first preset pressure, described low-voltage variation controlling method also comprises:
Detect the ambient temperature residing for described compressor,
Judge whether described goal pressure is less than the first preset pressure and comprises:
The size of more described ambient temperature and the first preset temperature;
When comparing described ambient temperature and being greater than described first preset temperature, judge whether described goal pressure is less than described pressure lpx1; And
When comparing described ambient temperature and being less than or equal to described first preset temperature, judge whether described goal pressure is less than described pressure lpx2,
Wherein, judging that described goal pressure is less than described pressure lpx1, or when judging that described goal pressure is less than described pressure lpx2, determining that described goal pressure is less than described first preset pressure.
3. low-voltage variation controlling method according to claim 1, is characterized in that, described low-voltage variation controlling method also comprises:
Before the unlatching duration obtaining described compressor, obtain the on off state of described compressor, wherein, when described on off state represents open state, obtain described unlatching duration;
When described on off state represents off-mode, judge whether described goal pressure is less than the 3rd preset pressure; And
When judging that described goal pressure is less than described 3rd preset pressure, send described out code to described compressor.
4. low-voltage variation controlling method according to claim 3; it is characterized in that; described 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of described pressure lpx3, and before judging whether described goal pressure is less than the 3rd preset pressure, described low-voltage variation controlling method also comprises:
Detect the ambient temperature residing for described compressor,
Judge whether described goal pressure is less than the 3rd preset pressure and comprises:
The size of more described ambient temperature and the second preset temperature;
When comparing described ambient temperature and being less than or equal to described second preset temperature, judge whether described goal pressure is less than described pressure lpx3; And
When comparing described ambient temperature and being greater than described second preset temperature, judge whether described goal pressure is less than described pressure lpx4,
Wherein, judging that described goal pressure is less than described pressure lpx3, or when judging that described goal pressure is less than described pressure lpx4, determining that described goal pressure is less than described 3rd preset pressure.
5. low-voltage variation controlling method according to claim 3, is characterized in that, described low-voltage variation controlling method also comprises:
Before the on off state obtaining described compressor, judge whether target controller sends start-up command to described compressor, wherein, when judging that described target controller sends described start-up command to described compressor, obtain described on off state, described target controller is the controller controlling described compressor;
When judging that described target controller does not send described start-up command to described compressor, judge whether described goal pressure is less than described first preset pressure or described 3rd preset pressure; And
When judging that described goal pressure is less than described first preset pressure or described 3rd preset pressure, send described out code to described compressor.
6. low-voltage variation controlling method according to claim 5, is characterized in that, described low-voltage variation controlling method also comprises:
Judging whether described goal pressure is less than the 4th preset pressure, wherein, when judging that described goal pressure is more than or equal to described 4th preset pressure, judging whether target controller sends start-up command to described compressor; And
When judging that described goal pressure is less than described 4th preset pressure, send described out code to described compressor.
7. a low-voltage variation control gear for compressor, is characterized in that, comprising:
First detection unit, for detecting goal pressure, wherein, described goal pressure is the package pressure of described compressor or the low pressure of described compressor;
First acquiring unit, for obtaining the unlatching duration of described compressor;
Comparing unit, for the size of more described unlatching duration and preset duration;
First judging unit, for when comparing described unlatching duration and being less than described preset duration, judges whether described goal pressure is less than the first preset pressure;
Second judging unit, for when comparing described unlatching duration and being more than or equal to described preset duration, judges whether described goal pressure is less than the second preset pressure, and wherein, described second preset pressure is greater than described first preset pressure; And
First transmitting element, for judging that described goal pressure is less than described first preset pressure, or when judging that described goal pressure is less than described second preset pressure, is sending out code to described compressor.
8. low-voltage variation control gear according to claim 7, is characterized in that, described first preset pressure comprises pressure lpx1 and is less than the pressure lpx2 of described pressure lpx1, and described low-voltage variation control gear also comprises:
Second detection unit, before judging whether described goal pressure is less than the first preset pressure at described first judging unit, detects the ambient temperature residing for described compressor,
Described first judging unit comprises:
First comparison module, for the size of more described ambient temperature and the first preset temperature;
First judge module, for when comparing described ambient temperature and being greater than described first preset temperature, judges whether described goal pressure is less than described pressure lpx1; And
Second judge module, for when comparing described ambient temperature and being less than or equal to described first preset temperature, judges whether described goal pressure is less than described pressure lpx2,
Wherein, judging that described goal pressure is less than described pressure lpx1, or when judging that described goal pressure is less than described pressure lpx2, determining that described goal pressure is less than described first preset pressure.
9. low-voltage variation control gear according to claim 7, is characterized in that, described low-voltage variation control gear also comprises:
Second acquisition unit, for before the unlatching duration obtaining described compressor, obtains the on off state of described compressor, wherein, when described on off state represents open state, obtains described unlatching duration;
3rd judging unit, for when described on off state represents off-mode, judges whether described goal pressure is less than the 3rd preset pressure; And
Second transmitting element, for when judging that described goal pressure is less than described 3rd preset pressure, sends described out code to described compressor.
10. low-voltage variation control gear according to claim 9, is characterized in that, described 3rd preset pressure comprises pressure lpx3 and is greater than the pressure lpx4 of described pressure lpx3, and described low-voltage variation control gear also comprises:
3rd detection unit, for before judging whether described goal pressure is less than the 3rd preset pressure, detects the ambient temperature residing for described compressor,
Described 3rd judging unit comprises:
Second comparison module, for the size of more described ambient temperature and the second preset temperature;
3rd judge module, for when comparing described ambient temperature and being less than or equal to described second preset temperature, judges whether described goal pressure is less than described pressure lpx3; And
4th judge module, for when comparing described ambient temperature and being greater than described second preset temperature, judges whether described goal pressure is less than described pressure lpx4,
Wherein, judging that described goal pressure is less than described pressure lpx3, or when judging that described goal pressure is less than described pressure lpx4, determining that described goal pressure is less than described 3rd preset pressure.
11. low-voltage variation control gear according to claim 9, is characterized in that, described low-voltage variation control gear also comprises:
4th judging unit, for obtain described compressor at described second acquisition unit on off state before, judge whether target controller sends start-up command to described compressor, wherein, when described 4th judging unit judges that described target controller sends described start-up command to described compressor, described second acquisition unit obtains described on off state, and described target controller is the controller controlling described compressor;
5th judging unit, when described 4th judging unit judges that described target controller does not send described start-up command to described compressor, judges whether described goal pressure is less than described first preset pressure or described 3rd preset pressure; And
3rd transmitting element, when judging that described goal pressure is less than described first preset pressure or described 3rd preset pressure, sends described out code to described compressor.
12. low-voltage variation control gear according to claim 11, is characterized in that, described low-voltage variation control gear also comprises:
6th judging unit, for judging whether described goal pressure is less than the 4th preset pressure, wherein, when judging that described goal pressure is more than or equal to described 4th preset pressure, described 4th judging unit judges whether target controller sends start-up command to described compressor; And
4th transmitting element, for when judging that described goal pressure is less than described 4th preset pressure, sends described out code to described compressor.
13. 1 kinds of compressors, is characterized in that, comprise the low-voltage variation control gear of the compressor according to any one of claim 7 to 12.
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