CN105387666B - The method and apparatus of control condensation unit - Google Patents
The method and apparatus of control condensation unit Download PDFInfo
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- CN105387666B CN105387666B CN201511009908.XA CN201511009908A CN105387666B CN 105387666 B CN105387666 B CN 105387666B CN 201511009908 A CN201511009908 A CN 201511009908A CN 105387666 B CN105387666 B CN 105387666B
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- pressure value
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- preparatory condition
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
Abstract
The invention discloses a kind of method and apparatus for controlling condensation unit.Wherein, this method includes：The first pressure value of detection condensation unit low-pressure side；Judge that first pressure value meets the first preparatory condition or the second preparatory condition, wherein, the first preparatory condition is the related condition of temperature, and the second preparatory condition is time, the condition of pressure correlation；When judging that first pressure value meets the first preparatory condition, the compressor start of control condensation unit；When judging that first pressure value meets the second preparatory condition, the compressor shutdown of control condensation unit.The present invention solves the technical problem of high frequent start-stop in the prior art.
Description
Technical field
The present invention relates to control field, in particular to a kind of method and apparatus for controlling and condensing unit.
Background technology
At present, controlling fixed frequency to condense, unit is started shooting and the process of shutdown is：Work as PIt is actual≥PSettingDuring+Δ P, condensation unit is opened
Machine, work as PIt is actual≤PSettingDuring-Δ P, compressor emergency shutdown is condensed.PIt is actualRefer to the unit low pressure value of pressure controller detection, PSettingIt is
Refer to the pressure reset values set on pressure controller, Δ P refers to the pressure divergence value set on pressure controller.
Make the startup and shutdown for controlling condensation unit in this way, many drawbacks be present.If pressure divergence value Δ P is set
Put too much, condense the actual shutdown value of unit with regard to less than normal, the use range of compressor may be exceeded, compressor is caused to damage
It is bad.If pressure divergence value Δ P sets too small, the actual start pressure value of unit can be very close to actual pressure value of shutting down,
When causing the unit to meet optional stop, as long as system pressure somewhat gos up, unit can start shooting again, so circulation.High frequent
Open and stop, easily cause compressor oil starvation to damage compressor.
For it is above-mentioned the problem of, not yet propose effective solution at present.
The content of the invention
The embodiments of the invention provide a kind of method and apparatus for controlling condensation unit, at least to solve to press in the prior art
The technical problem of the frequent start-stop of contracting machine.
One side according to embodiments of the present invention, there is provided a kind of method for controlling condensation unit, including：Detection condensation
The first pressure value of unit low-pressure side；Judge that the first pressure value meets the first preparatory condition or the second preparatory condition, its
In, first preparatory condition is the related condition of temperature, and second preparatory condition is time, the condition of pressure correlation；
When judging that the first pressure value meets first preparatory condition, the compressor start of the condensation unit is controlled；Sentencing
Break when the first pressure value and meeting second preparatory condition, control the compressor shutdown of the condensation unit.
Further, judge that the first pressure value meets that the first preparatory condition or the second preparatory condition include：Obtain
Refrigerant saturation temperature corresponding to the first pressure value；Judge whether the refrigerant saturation temperature is more than the condensation unit
Target evaporating temperature value；If judging, the refrigerant saturation temperature is more than the target evaporating temperature value, it is determined that described
First pressure value meets first preparatory condition.
Further, judge that the first pressure value meets that the first preparatory condition or the second preparatory condition include：Obtain
Second pressure value corresponding to the target evaporating temperature value of the condensation unit；It is described to judge whether the first pressure value is more than
Second pressure value；If judging, the first pressure value is more than the second pressure value, it is determined that the first pressure value meets
First preparatory condition.
Further, judge that the first pressure value meets that the first preparatory condition or the second preparatory condition include：Judge
Whether the first pressure value is less than default shutdown pressure value；If judging, the first pressure value is less than default shut down and pressed
Force value, it is determined that the first pressure value meets second preparatory condition.
Further, after judging that the first pressure value is less than the default shutdown pressure value, and institute is determined
State before first pressure value meets second preparatory condition, methods described also includes：Gather described in the condensation unit maintenance
First duration of first pressure value；Judge whether first duration is more than preset duration, wherein, when judging described first
When length is more than the preset duration, determine that the first pressure value meets second preparatory condition.
Another aspect according to embodiments of the present invention, a kind of device for controlling condensation unit is additionally provided, including：Detection is single
Member, for detecting the first pressure value of condensation unit low-pressure side；First judging unit, for judging that the first pressure value meets
First preparatory condition or the second preparatory condition, wherein, first preparatory condition is the related condition of temperature, and described second is pre-
If condition is time, the condition of pressure correlation；First control unit, for judging described first in first judging unit
After pressure value meets first preparatory condition, the compressor start of the condensation unit is controlled；Second control unit, is used for
After first judging unit judges that the first pressure value meets second preparatory condition, the freezing machine is controlled
The compressor shutdown of group.
Further, first judging unit includes：First obtains subelement, for obtaining the first pressure value pair
The refrigerant saturation temperature answered；First judgment sub-unit, for judging whether the refrigerant saturation temperature is more than the condensation
The target evaporating temperature value of unit；First determination subelement, for judging the refrigerant in first judgment sub-unit
Saturation temperature is more than after the target evaporating temperature value, determines that the first pressure value meets first preparatory condition.
Further, first judging unit includes：Second obtains subelement, for obtaining the mesh of the condensation unit
Mark the second pressure value corresponding to evaporating temperature value；Second judgment sub-unit, for judging whether the first pressure value is more than
The second pressure value；Second determination subelement, for judging that the first pressure value is big in second judgment sub-unit
After the second pressure value, determine that the first pressure value meets first preparatory condition.
Further, first judging unit includes：3rd judgment sub-unit, for judging that the first pressure value is
It is no to be less than default shutdown pressure value；3rd determination subelement, for judging first pressure in the 3rd judgment sub-unit
Force value is less than after the default shutdown pressure value, determines that the first pressure value meets second preparatory condition.
Further, described device also includes：Collecting unit, for judging described in the 3rd judgment sub-unit
One pressure value is less than after the default shutdown pressure value, and determines the first pressure value in the 3rd determination subelement
Before meeting second preparatory condition, the first duration that the condensation unit maintains the first pressure value is gathered；Second sentences
Disconnected unit, for judging whether first duration is more than preset duration, wherein, judging that it is described that first duration is more than
During preset duration, determine that the first pressure value meets second preparatory condition.
In embodiments of the present invention, the first pressure value of detection condensation unit low-pressure side；Judge that the first pressure value expires
Foot the first preparatory condition or the second preparatory condition, wherein, first preparatory condition is the condition of temperature correlation, described second
Preparatory condition is time, the condition of pressure correlation；When judging that the first pressure value meets first preparatory condition, control
Make the compressor start of the condensation unit；When judging that the first pressure value meets second preparatory condition, control
The compressor shutdown of the condensation unit.By the way that the compressor start up condition for condensing the compressor of unit is arranged into the bar related to temperature
Part, the cut-off condition of compressor is arranged to the condition with time, pressure correlation, the compressor start up condition and cut-off condition phase of compressor
It is mutually independent, be independent of each other, the startup and shutdown of compressor can be controlled respectively, avoid the startup and shutdown of compressor completely according to
Controlled by same setting value and same deviation, reached control compressor startup and shutdown, avoided high frequent from opening
The technique effect stopped, and then solve the technical problem of high frequent start-stop in the prior art.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the method for control condensation unit according to an embodiment of the invention；
Fig. 2 is the flow chart according to the method for the control condensation unit of further embodiment of this invention；
Fig. 3 is the flow chart according to the method for the control condensation unit of further embodiment of this invention；And
Fig. 4 is the schematic diagram of the device of control condensation unit according to embodiments of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
Fig. 1 is the flow chart of the method for control condensation unit according to an embodiment of the invention.As shown in figure 1, this method
Comprise the following steps：
Step S102, the first pressure value of detection condensation unit low-pressure side.Condense unit and be used for the equipment such as refrigerator, freezer
In.Condensation unit generally comprises condenser, compressor etc..Condensation unit low-pressure side refers to suction side, and it is low to condense unit
The first pressure value of pressure side refers to the pressure value for condensing the suction side of unit.Condensation unit low-pressure side pressure value be by
It is arranged on the value that the low pressure sensor of low-pressure side detects in real time.
Step S104, judge that first pressure value meets the first preparatory condition or the second preparatory condition, wherein, first is default
Condition is the related condition of temperature, and the second preparatory condition is time, the condition of pressure correlation.First preparatory condition and second is preset
Condition is the condition pre-set.First preparatory condition can be the condition related to refrigerant saturation temperature.Second is default
Condition can be in the range of the regular hour, and first pressure value is less than default shutdown pressure value.
Step S106, when judging that first pressure value meets the first preparatory condition, the compressor of control condensation unit is opened
Machine.
Step S108, when judging that first pressure value meets the second preparatory condition, the compression office of control condensation unit
Machine.
In embodiments of the present invention, by the way that the compressor start up condition for condensing the compressor of unit is arranged into the bar related to temperature
Part, the cut-off condition of compressor is arranged to the condition with time, pressure correlation, the compressor start up condition and cut-off condition phase of compressor
It is mutually independent, be independent of each other, the startup and shutdown of compressor can be controlled respectively, avoid the startup and shutdown of compressor completely according to
Controlled by same setting value and same deviation, so as to solve the technical problem of high frequent start-stop, reached control
Compressor startup and shutdown processed, the technique effect for avoiding high frequent start-stop.
Alternatively, judge that first pressure value meets that the first preparatory condition or the second preparatory condition include：Obtain the first pressure
Refrigerant saturation temperature corresponding to force value；Judge whether refrigerant saturation temperature is more than the target evaporating temperature value of condensation unit；
If judging, refrigerant saturation temperature is more than target evaporating temperature value, it is determined that first pressure value meets the first preparatory condition.
Refrigerant enters in evaporator through restricting element, and gas-liquid two states coexist in evaporator, are reaching dynamic balancing
During state, referred to as saturation state.Steam now is referred to as saturated vapor, and liquid now is referred to as saturated liquid.In same saturation
Under state, the pressure of saturated vapor is equal with the pressure of saturated liquid, and referred to as saturation pressure；The temperature of saturated vapor with
The temperature of saturated liquid is also equal, and referred to as saturation temperature.
In general, the pressure value of the saturation temperature of refrigerant and suction side corresponds, and be proportionate
Relation.
After compressor shuts down a period of time, the storehouse temperature rise in freezer, when storehouse temperature rise is to certain temperature, system
The magnetic valve of main road is opened, and is continued to evaporator feed flow, evaporator is interior and the pressure value of suction side can go up rapidly.Root
According to the suction side of condensation unit pressure value and refrigerant saturation temperature corresponding relation, find out the of current time
The saturation temperature of refrigerant, judges corresponding to one pressure value (i.e. the pressure value of the suction side of current time condensation unit)
Whether the saturation temperature of refrigerant corresponding to the first pressure value at current time is more than the target evaporating temperature value of condensation unit.Mesh
Mark evaporating temperature value can be Te_aim or Te_aim with Δ T and, wherein, Te_aim is one with condensing unit
Different and change the values of applying working condition, Δ T refer to the value of a precision for representing temperature deviation or temperature.If it is judged that work as
The saturation temperature of refrigerant corresponding to the first pressure value at preceding moment is more than the target evaporating temperature value of condensation unit, it is determined that when
The first pressure value at preceding moment meets the first preparatory condition, and now, the compressor for condensing unit is started shooting.
Alternatively, judge that first pressure value meets that the first preparatory condition or the second preparatory condition include：Obtain freezing machine
Second pressure value corresponding to the target evaporating temperature value of group；Judge whether first pressure value is more than second pressure value；If judge
Go out first pressure value and be more than second pressure value, it is determined that first pressure value meets the first preparatory condition.
Because the saturation temperature of refrigerant corresponds with saturation pressure force value, and the relation being proportionate, therefore, Ke Yigen
According to the corresponding relation between the saturation temperature and saturation pressure force value of the refrigerant prestored, the saturation temperature when refrigerant is found out
Value for condensation unit target evaporating temperature value when, corresponding saturation pressure force value, this pressure value is above-mentioned second pressure value.
Once the target evaporating temperature value of condensation unit determines that second pressure value also just accordingly determines.When will be current
The first pressure value (pressure value of the suction side of current time condensation unit) at quarter is compared with second pressure value.Such as
The first pressure value at fruit current time is more than second pressure value, it is determined that the first pressure value at current time meets the first default bar
Part, now, the compressor for condensing unit is started shooting.
Alternatively, judge that first pressure value meets that the first preparatory condition or the second preparatory condition include：Judge the first pressure
Whether force value is less than default shutdown pressure value；If judging, first pressure value is less than default shutdown pressure value, it is determined that the first pressure
Force value meets the second preparatory condition.
Default pressure value of shutting down is the numerical value pre-set, is one related to condensing the parameter of the compressor of unit
Individual numerical value.
When the Ku Wen of freezer reaches object library temperature, the closed electromagnetic valve of system main road, no longer to evaporator feed flow, and by
Continued to run with compressor, cause the pressure in evaporator to decline always, current time is condensed to the suction side of unit
Pressure value (the first pressure value at current time) with it is default shut down pressure value compared with, if it is judged that current time condense
The pressure value (the first pressure value at current time) of the suction side of unit is less than default shutdown pressure value, it is determined that first
Pressure value meets the second preparatory condition, and now, the compressor for condensing unit is shut down.
The compressor start up condition (the first preparatory condition) and cut-off condition (the of the compressor of unit will be condensed by mainboard micro computer
Two preparatory conditions) it is respectively controlled, while default shutdown pressure value is configured according to compressor operating scope, reduce
The possibility of compressor Use overrun, and high frequent start-stop is avoided, the service life of compressor is extended, is also kept away
The energy waste as caused by high frequent start-stop is exempted from.
Alternatively, after judging that first pressure value is less than default shutdown pressure value, and determine that first pressure value expires
Before the second preparatory condition of foot, the method for the control condensation unit that the embodiment of the present invention is provided also includes：Collection condensation unit
Maintain the first duration of first pressure value；Judge whether the first duration is more than preset duration, wherein, grown up when judging first
When preset duration, determine that first pressure value meets the second preparatory condition.
The pressure value (first pressure value) of collection condensation unit maintenance suction side, which is less than to preset, shuts down pressure value
Duration, this duration are above-mentioned first duration.Preset duration can using value as 2 seconds, 3 seconds, etc..If it is judged that condensation unit dimension
The pressure value (first pressure value) for holding suction side is more than preset duration less than the default duration for shutting down pressure value, it is determined that
First pressure value meets the second preparatory condition, and now, the compressor for condensing unit is shut down.
First pressure value is maintained to be less than the default duration for shutting down pressure value by gathering condensation unit, only in condensation unit
When the duration that maintenance first pressure value is less than default shutdown pressure value is more than preset duration, compressor can just be shut down, such energy
Enough avoid by accidentalia cause first pressure value be less than it is default shut down pressure value when, compressor is shut down this error at once,
Ensure when maintaining default shut down under pressure value with condensing the pressure stability of low-pressure side of unit, just can be by compression office
Machine, so as to avoid high frequent start and stop, and it is big and unrestrained to avoid the compressor loss caused by high frequent start and stop
Take the technical problem of the energy.
Fig. 2 is the flow chart according to the method for the control condensation unit of further embodiment of this invention.As shown in Fig. 2 the party
Method comprises the following steps：
Step S202, whether judge to condense refrigerant saturation temperature corresponding to the pressure value of the low-pressure side of unit more than default
Temperature numerical, wherein, the preset temperature numerical value is the target evaporating temperature value of above-mentioned condensation unit.If it is judged that condensation unit
Low-pressure side pressure value corresponding to refrigerant saturation temperature be more than preset temperature numerical value, then perform step S204.If it is determined that
Go out to condense refrigerant saturation temperature corresponding to the pressure value of the low-pressure side of unit and be less than or equal to preset temperature numerical value, then perform
Step S206.Step S202 embodiment is identical with above-mentioned steps S104.
Step S204, compressor is started shooting.Step S204 embodiment is identical with above-mentioned steps S106.
Step S206, maintain the off-mode of compressor.When compressor is in off-mode, if it is judged that freezing machine
Refrigerant saturation temperature corresponding to the pressure value of the low-pressure side of group is less than or equal to preset temperature numerical value, then maintains compressor
Off-mode.
In embodiments of the present invention, by setting the startup and shutdown condition of compressor, the compressor start up condition of compressor respectively
It is separate with cut-off condition, it is independent of each other, the startup and shutdown of compressor can be controlled respectively, avoid the start of compressor
Same setting value and the control of same deviation are fully relied on shutdown, is asked so as to solve the technology of high frequent start-stop
Topic, control compressor startup and shutdown reached, have avoided the technique effect of high frequent start-stop.
Fig. 3 is the flow chart according to the method for the control condensation unit of further embodiment of this invention.As shown in figure 3, the party
Method comprises the following steps：
Step S302, judges whether the pressure value for condensing the low-pressure side of unit is less than default shutdown pressure value, wherein, preset
Pressure value is shut down as it was noted above, numerical value to pre-set.It is less than in the pressure value for judging to condense the low-pressure side of unit pre-
If shut down pressure value, step S304 is performed；It is more than or equal in the pressure value for judging to condense the low-pressure side of unit default
When shutting down pressure value, step S306 is performed.Step S302 embodiment is identical with above-mentioned steps S104.
Step S304, compressor is shut down.When compressor shuts down, compressor emergency shutdown is condensed.Step S304 specific embodiment party
Formula is identical with above-mentioned steps S108.
Step S306, maintain the opening of compressor.Now condensation unit continues to run with.
In embodiments of the present invention, by setting the startup and shutdown condition of compressor, the compressor start up condition of compressor respectively
It is separate with cut-off condition, it is independent of each other, the startup and shutdown of compressor can be controlled respectively, avoid the start of compressor
Same setting value and the control of same deviation are fully relied on shutdown, is asked so as to solve the technology of high frequent start-stop
Topic, control compressor startup and shutdown reached, have avoided the technique effect of high frequent start-stop.
It should be noted that it is specifically described above when illustrating embodiment by taking freezer as an example, it is impossible to therefore
Limit the invention to be applied in freezer.In fact, the present invention can be applied to freezer, refrigerator-freezer and similar refrigeration plant
In.
According to embodiments of the present invention, a kind of device for controlling condensation unit is additionally provided.The control condenses the device of unit
The method of above-mentioned control condensation unit is able to carry out, the method for above-mentioned control condensation unit also can condense unit by the control
Device implement.
Fig. 4 is the schematic diagram of the device of control condensation unit according to embodiments of the present invention.As shown in figure 4, the device bag
Include：Detection unit 42, the first judging unit 44, the first control unit 46 and the second control unit 48.
Detection unit 42 is used for the first pressure value for detecting condensation unit low-pressure side.Condense unit and be used for refrigerator, freezer etc.
In equipment.Condensation unit generally comprises condenser, compressor etc..Condensation unit low-pressure side refers to suction side, freezing machine
The first pressure value of group low-pressure side refers to the pressure value for condensing the suction side of unit.Condense the pressure value of unit low-pressure side
It is the value detected in real time by the low pressure sensor for being arranged on low-pressure side.
First judging unit 44 is used to judge that first pressure value meets the first preparatory condition or the second preparatory condition, its
In, the first preparatory condition is the related condition of temperature, and the second preparatory condition is time, the condition of pressure correlation.First default bar
Part and the second preparatory condition are the conditions pre-set.First preparatory condition can be the bar related to refrigerant saturation temperature
Part.Second preparatory condition can be in the range of the regular hour, and first pressure value is less than default shutdown pressure value.
First control unit 46 is used for after the first judging unit judges that first pressure value meets the first preparatory condition,
The compressor start of control condensation unit.
Second control unit 48 is used for after the first judging unit judges that first pressure value meets the second preparatory condition,
The compressor shutdown of control condensation unit.
In embodiments of the present invention, by the way that the compressor start up condition for condensing the compressor of unit is arranged into the bar related to temperature
Part, the cut-off condition of compressor is arranged to the condition with time, pressure correlation, the compressor start up condition and cut-off condition phase of compressor
It is mutually independent, be independent of each other, the startup and shutdown of compressor can be controlled respectively, avoid the startup and shutdown of compressor completely according to
Controlled by same setting value and same deviation, so as to solve the technical problem of high frequent start-stop, reached control
Compressor startup and shutdown processed, the technique effect for avoiding high frequent start-stop.
Alternatively, the first judging unit 44 includes the first acquisition subelement, the first judgment sub-unit and first determines that son is single
Member.First acquisition subelement is used to obtain refrigerant saturation temperature corresponding to first pressure value.First judgment sub-unit is used to sentence
Whether disconnected refrigerant saturation temperature is more than the target evaporating temperature value of condensation unit.First determination subelement is used to judge first
Subelement judges that refrigerant saturation temperature is more than after target evaporating temperature value, determines that first pressure value meets the first default bar
Part.
Refrigerant enters in evaporator through restricting element, and gas-liquid two states coexist in evaporator, are reaching dynamic balancing
During state, referred to as saturation state.Steam now is referred to as saturated vapor, and liquid now is referred to as saturated liquid.In same saturation
Under state, the pressure of saturated vapor is equal with the pressure of saturated liquid, and referred to as saturation pressure；The temperature of saturated vapor with
The temperature of saturated liquid is also equal, and referred to as saturation temperature.
In general, the pressure value of the saturation temperature of refrigerant and suction side corresponds, and be proportionate
Relation.
After compressor shuts down a period of time, the storehouse temperature rise in freezer, when storehouse temperature rise is to certain temperature, system
The magnetic valve of main road is opened, and is continued to evaporator feed flow, evaporator is interior and the pressure value of suction side can go up rapidly.Root
According to the suction side of condensation unit pressure value and refrigerant saturation temperature corresponding relation, find out the of current time
The saturation temperature of refrigerant, judges corresponding to one pressure value (i.e. the pressure value of the suction side of current time condensation unit)
Whether the saturation temperature of refrigerant corresponding to the first pressure value at current time is more than the target evaporating temperature value of condensation unit.Mesh
Mark evaporating temperature value can be Te_aim or Te_aim with Δ T and, wherein, Te_aim is one with condensing unit
Different and change the values of applying working condition, Δ T refer to the value of a precision for representing temperature deviation or temperature.If it is judged that work as
The saturation temperature of refrigerant corresponding to the first pressure value at preceding moment is more than the target evaporating temperature value of condensation unit, it is determined that when
The first pressure value at preceding moment meets the first preparatory condition, and now, the compressor for condensing unit is started shooting.
Alternatively, the first judging unit 44 includes the second acquisition subelement, the second judgment sub-unit and second determines that son is single
Member.Second, which obtains subelement, is used to obtain the second pressure value corresponding to the target evaporating temperature value for condensing unit.Second judges
Subelement is used to judge whether first pressure value is more than second pressure value.Second determination subelement is used in the second judgment sub-unit
Judge that first pressure value is more than after second pressure value, determine that first pressure value meets the first preparatory condition.
Because the saturation temperature of refrigerant corresponds with saturation pressure force value, and the relation being proportionate, therefore, Ke Yigen
According to the corresponding relation between the saturation temperature and saturation pressure force value of the refrigerant prestored, the saturation temperature when refrigerant is found out
Value for condensation unit target evaporating temperature value when, corresponding saturation pressure force value, this pressure value is above-mentioned second pressure value.
Once the target evaporating temperature value of condensation unit determines that second pressure value also just accordingly determines.When will be current
The first pressure value (pressure value of the suction side of current time condensation unit) at quarter is compared with second pressure value.Such as
The first pressure value at fruit current time is more than second pressure value, it is determined that the first pressure value at current time meets the first default bar
Part, now, the compressor for condensing unit is started shooting.
Alternatively, the first judging unit 44 includes the 3rd judgment sub-unit and the 3rd determination subelement.3rd judges that son is single
Member is used to judge whether first pressure value is less than default shutdown pressure value.3rd determination subelement is used in the 3rd judgment sub-unit
Judge that first pressure value is less than after default shutdown pressure value, determine that first pressure value meets the second preparatory condition.
Default pressure value of shutting down is the numerical value pre-set, is one related to condensing the parameter of the compressor of unit
Individual numerical value.
When the Ku Wen of freezer reaches object library temperature, the closed electromagnetic valve of system main road, no longer to evaporator feed flow, and by
Continued to run with compressor, cause the pressure in evaporator to decline always, current time is condensed to the suction side of unit
Pressure value (the first pressure value at current time) with it is default shut down pressure value compared with, if it is judged that current time condense
The pressure value (the first pressure value at current time) of the suction side of unit is less than default shutdown pressure value, it is determined that first
Pressure value meets the second preparatory condition, and now, the compressor for condensing unit is shut down.
The compressor start up condition (the first preparatory condition) and cut-off condition (the of the compressor of unit will be condensed by mainboard micro computer
Two preparatory conditions) it is respectively controlled, while default shutdown pressure value is configured according to compressor operating scope, reduce
The possibility of compressor Use overrun, and high frequent start-stop is avoided, the service life of compressor is extended, is also kept away
The energy waste as caused by high frequent start-stop is exempted from.
Alternatively, the device for the control condensation unit that the embodiment of the present invention is provided also includes collecting unit and the second judgement
Unit.Collecting unit is used for after the 3rd judgment sub-unit judges that first pressure value is less than default shutdown pressure value, and
Before the 3rd determination subelement determines that first pressure value meets the second preparatory condition, collection condensation unit maintains first pressure value
The first duration.Second judging unit is used to judge whether the first duration is more than preset duration, wherein, judging the first duration
During more than preset duration, determine that first pressure value meets the second preparatory condition.
The pressure value (first pressure value) of collection condensation unit maintenance suction side, which is less than to preset, shuts down pressure value
Duration, this duration are above-mentioned first duration.Preset duration can using value as 2 seconds, 3 seconds, etc..If it is judged that condensation unit pressure
The pressure value (first pressure value) of contracting machine suction side is less than the default duration for shutting down pressure value and is more than preset duration, it is determined that first
Pressure value meets the second preparatory condition, and now, the compressor for condensing unit is shut down.
First pressure value is maintained to be less than the default duration for shutting down pressure value by gathering condensation unit, only in condensation unit
When the duration that maintenance first pressure value is less than default shutdown pressure value is more than preset duration, compressor can just be shut down, such energy
Enough avoid by accidentalia cause first pressure value be less than it is default shut down pressure value when, compressor is shut down this error at once,
Ensure when maintaining default shut down under pressure value with condensing the pressure stability of low-pressure side of unit, just can be by compression office
Machine, so as to avoid high frequent start and stop, and it is big and unrestrained to avoid the compressor loss caused by high frequent start and stop
Take the technical problem of the energy.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.
In several embodiments provided by the present invention, it should be understood that disclosed technology contents, others can be passed through
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. method for controlling condensation unit, it is characterised in that including：The first pressure value of detection condensation unit low-pressure side；Judge that the first pressure value meets the first preparatory condition or the second preparatory condition, wherein, first preparatory condition It is the related condition of temperature, second preparatory condition is time, the condition of pressure correlation；When judging that the first pressure value meets first preparatory condition, the compressor of the condensation unit is controlled to open Machine；When judging that the first pressure value meets second preparatory condition, the compression office of the condensation unit is controlled Machine.
- 2. according to the method for claim 1, it is characterised in that judge that the first pressure value meets the first preparatory condition also It is that the second preparatory condition includes：Obtain refrigerant saturation temperature corresponding to the first pressure value；Judge whether the refrigerant saturation temperature is more than the target evaporating temperature value of the condensation unit；If judging, the refrigerant saturation temperature is more than the target evaporating temperature value, it is determined that the first pressure value meets First preparatory condition.
- 3. according to the method for claim 1, it is characterised in that judge that the first pressure value meets the first preparatory condition also It is that the second preparatory condition includes：Obtain the second pressure value corresponding to the target evaporating temperature value of the condensation unit；Judge whether the first pressure value is more than the second pressure value；If judging, the first pressure value is more than the second pressure value, it is determined that the first pressure value meets described first Preparatory condition.
- 4. according to the method for claim 1, it is characterised in that judge that the first pressure value meets the first preparatory condition also It is that the second preparatory condition includes：Judge whether the first pressure value is less than default shutdown pressure value；If judging, the first pressure value is less than the default shutdown pressure value, it is determined that described in the first pressure value meets Second preparatory condition.
- 5. according to the method for claim 4, it is characterised in that judging that the first pressure value is less than described default stop After machine pressure value, and before determining that the first pressure value meets second preparatory condition, methods described also includes：Gather the first duration that the condensation unit maintains the first pressure value；Judge whether first duration is more than preset duration, wherein, when judging that first duration is more than described default When long, determine that the first pressure value meets second preparatory condition.
- A kind of 6. device for controlling condensation unit, it is characterised in that including：Detection unit, for detecting the first pressure value of condensation unit low-pressure side；First judging unit, for judging that the first pressure value meets the first preparatory condition or the second preparatory condition, wherein, First preparatory condition is the related condition of temperature, and second preparatory condition is time, the condition of pressure correlation；First control unit, for judging that the first pressure value meets the described first default bar in first judging unit After part, the compressor start of the condensation unit is controlled；Second control unit, for judging that the first pressure value meets the described second default bar in first judging unit After part, the compressor shutdown of the condensation unit is controlled.
- 7. device according to claim 6, it is characterised in that first judging unit includes：First obtains subelement, for obtaining refrigerant saturation temperature corresponding to the first pressure value；First judgment sub-unit, for judging whether the refrigerant saturation temperature is more than the target evaporation temperature of the condensation unit Angle value；First determination subelement, for judging that the refrigerant saturation temperature is more than the mesh in first judgment sub-unit After marking evaporating temperature value, determine that the first pressure value meets first preparatory condition.
- 8. device according to claim 6, it is characterised in that first judging unit includes：Second obtains subelement, for obtaining the second pressure value corresponding to the target evaporating temperature value of the condensation unit；Second judgment sub-unit, for judging whether the first pressure value is more than the second pressure value；Second determination subelement, for judging that the first pressure value is more than the described second pressure in second judgment sub-unit After force value, determine that the first pressure value meets first preparatory condition.
- 9. device according to claim 6, it is characterised in that first judging unit includes：3rd judgment sub-unit, for judging whether the first pressure value is less than default shutdown pressure value；3rd determination subelement, for judging that the first pressure value is less than described preset and stopped in the 3rd judgment sub-unit After machine pressure value, determine that the first pressure value meets second preparatory condition.
- 10. device according to claim 9, it is characterised in that described device also includes：Collecting unit, for judging that the first pressure value is less than the default shutdown pressure in the 3rd judgment sub-unit After value, and before the 3rd determination subelement determines that the first pressure value meets second preparatory condition, adopt Collect the first duration that the condensation unit maintains the first pressure value；Second judging unit, for judging whether first duration is more than preset duration, wherein, when judging described first When length is more than the preset duration, determine that the first pressure value meets second preparatory condition.
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| CN201511009908.XA CN105387666B (en) | 2015-12-25 | 2015-12-25 | The method and apparatus of control condensation unit |
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| CN201511009908.XA CN105387666B (en) | 2015-12-25 | 2015-12-25 | The method and apparatus of control condensation unit |
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| CN108591035B (en) * | 2018-04-28 | 2020-08-07 | 重庆长安汽车股份有限公司 | Compressor starting control method, device, equipment and readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375870A (en) * | 2012-04-16 | 2013-10-30 | 珠海格力电器股份有限公司 | Intelligent refrigerating capacity adjusting method used for variable-flow air conditioning system |
| CN104791944A (en) * | 2014-01-21 | 2015-07-22 | 广东美的暖通设备有限公司 | Air conditioner system, control method of air conditioner system and outdoor unit of the air conditioner system |
| CN104848479A (en) * | 2015-04-29 | 2015-08-19 | 广东美的制冷设备有限公司 | Air conditioner, method and device for refrigerant pipeline pressure monitor and system control thereof |
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| TWI646264B (en) * | 2011-03-04 | 2019-01-01 | 美商布魯克機械公司 | Low temperature refrigeration system and method for controlling supply of helium refrigerant |
| US9664426B2 (en) * | 2012-08-20 | 2017-05-30 | Agile8 Consulting Limited | System and method for improving efficiency of a refrigerant based system |
| JP5935723B2 (en) * | 2013-03-06 | 2016-06-15 | 株式会社デンソー | Air conditioner for vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375870A (en) * | 2012-04-16 | 2013-10-30 | 珠海格力电器股份有限公司 | Intelligent refrigerating capacity adjusting method used for variable-flow air conditioning system |
| CN104791944A (en) * | 2014-01-21 | 2015-07-22 | 广东美的暖通设备有限公司 | Air conditioner system, control method of air conditioner system and outdoor unit of the air conditioner system |
| CN104848479A (en) * | 2015-04-29 | 2015-08-19 | 广东美的制冷设备有限公司 | Air conditioner, method and device for refrigerant pipeline pressure monitor and system control thereof |
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