CN103727629B - Air-cooled condensing unit starting method and device suitable for low-temperature environment - Google Patents
Air-cooled condensing unit starting method and device suitable for low-temperature environment Download PDFInfo
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- CN103727629B CN103727629B CN201210385454.6A CN201210385454A CN103727629B CN 103727629 B CN103727629 B CN 103727629B CN 201210385454 A CN201210385454 A CN 201210385454A CN 103727629 B CN103727629 B CN 103727629B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007858 starting material Substances 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 13
- 230000006978 adaptation Effects 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 10
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The invention discloses a method and a device for starting an air-cooled condensing unit suitable for a low-temperature environment. The method comprises the following steps: step S10, the control mainboard acquires a starting signal of the condensing unit; step S20, triggering evacuation protection of the shielding control main board according to the starting signal, and enabling the evacuation protection of the condensing unit to be invalid; and step S30, starting the compressor under the condition that the evacuation protection of the condensing unit is failed. The starting method and the starting device of the air-cooled condensing unit suitable for the low-temperature environment ensure the accuracy of judging the evacuation protection condition and ensure that the air-cooled condensing unit can be started and operated smoothly in the low-environment temperature environment.
Description
Technical field
The present invention relates to air conditioning unit equipment technical field, particularly relate to a kind of the air-cooled condensing group starting method and the device that adapt to low temperature environment.
Background technology
The air-cooled condensing group used in freezing and refrigeration field at present is after a shutdown, the indoor magnetic valve to indoor machine feed flow can be closed, stop feed flow, owing to envrionment temperature is very low, migrate in the lubricating oil bottom compressor after the refrigerant vapor condensation of indoor machine, when starting shooting, refrigeration agent is evaporated from lubricating oil again, a large amount of oil foam rolling can be produced, entering compression chamber with liquid refrigerant causes liquid to hit, in order to prevent this from occurring, usually before compressor emergency shutdown, the refrigerant of indoor machine is found time by compressor, along with the operation found time, the pressure of unit low-tension side reduces gradually, when the pressure of low pressure end is pumped to certain value, compressor shutdown is protected, pressure now is called as evacuation pressure.
But, in air-cooled condensing group start process, when unit is started shooting, low voltage value has the time dramatic decrease of several seconds; when envrionment temperature is lower, being easy to reach evacuation pressure value, compressor can be protected by auto stop; cause compressor just to start shooting just to shut down, can not normally open.
Therefore for prior art, when air-cooled condensing group starts at low ambient temperature, how to avoid causing because pressure drop is low low pressure value too low and find time to shut down, occur the situation of normal boot-strap being a problem demanding prompt solution.
Summary of the invention
The present invention provides a kind of the air-cooled condensing group starting method and the device that adapt to low temperature environment, and in order to avoid air-cooled condensing group when low ambient temperature starts, air-cooled condensing group cannot the problem of normal boot-strap.
Based on the problems referred to above, a kind of air-cooled condensing group starting method adapting to low temperature environment provided by the invention, described air-cooled condensing group comprises compressor, and the suction opening of described compressor is provided with pressure transmitter, and wherein method comprises:
Step S10, control mainboard obtain the initiating signal of condensation unit;
Step S20, the protection of finding time triggering shielding control mainboard according to described initiating signal, and make the shielding failure of finding time of described condensation unit;
Step S30, when described condensation unit find time shielding failure, perform open compressor operation.
Goodly, as a kind of embodiment. In step S20, the concrete steps of the protection of finding time of shielding control mainboard are as follows:
After step S100, reception compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then performs step S200; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope performs step S200 again;
Step S200, control mainboard receive the low pressure value being arranged on the pressure transmitter of compressor air suction mouth and detecting;
Step S300, control mainboard compare with described default evacuation pressure value according to described low pressure value, judge whether that execution finds time to protect shutdown operation; If then performing step S400; If not, then return step S200 and perform corresponding operation;
Step S400, control mainboard send protection instruction of finding time to compressor, and control compressor performs to find time shutdown operation.
Goodly, as a kind of embodiment. In described step S100, control mainboard also comprises the steps S110 after starting timing:
Step S110, pressure transmitter detect the low pressure value of the suction opening of compressor in real time and Detection Information are sent to control mainboard.
Goodly, as a kind of embodiment. In described step S300, described according to described low pressure value with preset evacuation pressure value compare for:
Judge whether the low pressure value of current detection continues to be less than described default evacuation pressure value in default time threshold.
Goodly, as a kind of embodiment. The described default time cycle is more than or equal to 2 minutes.
Goodly, as a kind of embodiment. Described default time threshold is 5 seconds.
Correspondingly, as a kind of embodiment. Present invention also offers a kind of air-cooled condensing group starter gear adapting to low temperature environment; for controlling the compressor of air-cooled condensing group; described starter gear comprises the pressure transmitter on the suction opening connecting described compressor; and connect the control mainboard of described compressor; described control mainboard is used for the compressor to described air-cooled condensing group and performs to start control operation; described control mainboard comprises signal processing module, information receiving module, judgement module and shuts down module, wherein:
Described signal processing module, after receiving compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then jump information receiver module performs corresponding operating; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope jump information receiver module execution corresponding operating again;
Described information receiving module, for receiving the low pressure value that the pressure transmitter being arranged on compressor air suction mouth detects;
Described judgement module, for comparing with the evacuation pressure value preset according to described low pressure value, judges whether that execution is found time shutdown operation; If then redirect is shut down and is performed corresponding operating; If not, then return described information receiving module and perform corresponding operation;
Described shutdown module, for protection instruction of finding time to compressor, control compressor performs to find time shutdown operation.
Goodly, as a kind of embodiment. Described judgement module comprises and judges submodule block, wherein:
Whether described judgement submodule block, continue to be less than described default evacuation pressure value for judging the low pressure value of current detection in default time threshold, if then Predicated execution is found time shutdown operation; If not, then judge not perform shutdown operation of finding time.
Goodly, as a kind of embodiment. Described signal processing module comprises detection and transmits submodule block, is sent to information receiving module for pressure transmitter detects the low pressure value obtained of the suction opening of compressor in real time.
Goodly, as a kind of embodiment. The described default time cycle is more than or equal to 2 minutes.
Goodly, as a kind of embodiment. Described default time threshold is 5 seconds.
The useful effect of the present invention comprises:
A kind of air-cooled condensing group starting method and device adapting to low temperature environment provided by the invention. Comprising: after step S100, reception compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then performs step S200; If judged result is no, then shields transmission and find time to protect instruction; Step S200, control mainboard receive and are arranged on the low pressure value send that the pressure transmitter of compressor air suction mouth detects and find time protection instruction; Step S300, control mainboard compare with described default evacuation pressure value according to described low pressure value, judge whether that execution is found time shutdown operation; If then performing step S400; If not, then return step S200 and perform corresponding operation; Step S400, control mainboard send the protection instruction of finding time finding time accordingly to shut down to compressor, and control compressor performs to find time shutdown operation. Described starting method by closing protection function of finding time within the default time cycle; after start for some time; detect low pressure value again and open relevant control circuit and the function of protection of finding time, judge whether low pressure value reaches the accuracy of protection of finding time and ensure that air-cooled condensing group can be started shooting operation smoothly at low ambient temperature environment by greatly having ensured like this.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention adapts to air-cooled condensing group starting method one specific embodiment of low temperature environment;
Fig. 2 is the structural representation that the present invention adapts to control in the air-cooled condensing group starter gear of low temperature environment mainboard one specific embodiment;
Fig. 3 is the schematic diagram that the present invention adapts to air-cooled condensing group starter gear principle of work one specific embodiment of low temperature environment.
Embodiment
Below in conjunction with Figure of description, the startup of air-cooled condensing group and device embodiment that the present invention adapts to low temperature environment are described.
A kind of air-cooled condensing group starting method adapting to low temperature environment that the embodiment of the present invention also provides, described air-cooled condensing group comprises compressor, the suction opening of described compressor is provided with pressure transmitter, described starting method is realized by the air-cooled condensing group starter gear of described adaptation low temperature environment, as shown in Figure 1, described starting method comprises the steps:
Step S10, control mainboard obtain the initiating signal of condensation unit;
Step S20, the protection of finding time triggering shielding control mainboard according to described initiating signal, and make the shielding failure of finding time of described condensation unit;
Step S30, when described condensation unit find time shielding failure, perform open compressor operation.
Goodly, as a kind of embodiment. In step S20, the concrete steps of the protection of finding time of shielding control mainboard are as follows:
After step S100, reception compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then performs step S200; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope performs step S200 again;
Step S200, control mainboard receive the low pressure value being arranged on the pressure transmitter of compressor air suction mouth and detecting;
Step S300, control mainboard compare with described default evacuation pressure value according to described low pressure value, judge whether that execution finds time to protect shutdown operation; If then performing step S400; If not, then return step S200 and perform corresponding operation;
Step S400, control mainboard send protection instruction of finding time to compressor, and control compressor performs to find time shutdown operation.
Goodly, as a kind of embodiment. In described step S100, control mainboard also comprises the steps S110 after starting timing:
Step S110, pressure transmitter detect the low pressure value of the suction opening of compressor in real time and Detection Information are sent to control mainboard.
Goodly, as a kind of embodiment. In described step S300, described control mainboard compares with the evacuation pressure value preset according to described low pressure value, performs judgement operation and specifically comprises the following steps S310:
Whether step S310, the low pressure value judging current detection continue to be less than described default evacuation pressure value in default time threshold.
Goodly, as a kind of embodiment. The described default time cycle is more than or equal to 2 minutes.
Goodly, (1-2 minute) shielding transmission for some time to be found time to protect instruction (shielding transmission finds time to protect signal) signal when air-cooled condensing group is started shooting. In embodiments of the present invention, therefore the time cycle preset is more than or equal to 2 minutes. Like this; when low temperature environment is started shooting; low voltage value lower than finding time shutdown value also can not shut down; after compressor opens 2 minutes; control mainboard just starts just to send protection instruction of finding time; and judge whether send perform stoppage protection find time protect instruction (described in find time protect instruction comprise control perform shut down find time stoppage protection instruction and control perform maintain running protection instruction; to find time, protection signal form is sent on the control device of compressor in described protection instruction of finding time), such air-cooled condensing group just can be opened smoothly and normally be run.
Goodly, as a kind of embodiment. Described default time threshold is 5 seconds.
Those skilled in the art are to be understood that, in step S310, when judging whether the low pressure value of current detection continues to be less than default evacuation pressure value within 5 seconds, then Predicated execution is found time shutdown operation.
Wherein, continuous 5 seconds are to confirm that low pressure value now is less than evacuation pressure value.
In embodiments of the present invention, the suction opening at compressor is provided with pressure transmitter, detects the low pressure value of compressor in air-cooled condensing group in real time. When compressor start runs; within the default time cycle, mask described compressor find time to protect instruction (namely compressor start judges whether after running for some time that execution finds time to protect, and avoids guarantee because when air-cooled condensing group is started shooting, the illusion causing and reaching evacuation pressure falls in force value suddenly so again).
Air-cooled condensing group is in low temperature environment after normal boot-strap; control mainboard starts timing; the time of regulation shielding is that (within 2 minutes, shielding found time to protect signal in 2 minutes; namely shield transmission to find time to protect instruction); arrive after 2 minutes; compare with the evacuation pressure value of setting according to the force value that pressure transmitter detects at suction opening, judge whether that needs find time to shut down. In the moment of start, air-cooled condensing group low pressure may reach a very low value, will recover in a short period of time normal (being generally several seconds), and often the reduction of this instantaneous pressure will cause finding time protection and shut down, and makes the unit cannot normal boot-strap. Therefore it is defined in 2 minutes and shields protection of finding time, in just start in 2 minutes, can not find time to shut down. This guarantees air-cooled condensing group can start shooting smoothly in low ambient temperature area operation.
Conceive based on same invention, the embodiment of the present invention additionally provides a kind of air-cooled condensing group starter gear adapting to low temperature environment, the principle dealt with problems due to this method is similar to every step of aforementioned a kind of air-cooled condensing group starting method adapting to low temperature environment, therefore, the enforcement of this device can be realized by aforementioned method concrete steps, repeats part and repeats no more.
The air-cooled condensing group starter gear 100 of the adaptation low temperature environment that the embodiment of the present invention provides; see Fig. 2 and Fig. 3; described starter gear is for controlling the compressor of air-cooled condensing group; described starter gear 100 comprises the pressure transmitter on the suction opening connecting described compressor; and connect the control mainboard 1 of described compressor; described control mainboard is used for the compressor to described air-cooled condensing group and performs to start control operation; described control mainboard 1 comprises signal processing module 10, information receiving module 20, judges module 30 and shuts down module 40, wherein:
Described signal processing module 10, after receiving compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then jump information receiver module performs corresponding operating; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope jump information receiver module execution corresponding operating again;
Described information receiving module 20, for receiving the low pressure value that the pressure transmitter being arranged on compressor air suction mouth detects;
Described judgement module 30, for comparing with the evacuation pressure value preset according to described low pressure value, judges whether that execution is found time shutdown operation; If then redirect is shut down and is performed corresponding operating; If not, then return described information receiving module and perform corresponding operation;
Described shutdown module 40, for protection instruction of finding time to compressor, control compressor performs to find time shutdown operation.
Goodly, as a kind of embodiment. Described judgement module 30 comprises and judges submodule block, wherein:
Whether described judgement submodule block, continue to be less than described default evacuation pressure value for judging the low pressure value of current detection in default time threshold, if then Predicated execution is found time shutdown operation; If not, then judge not perform shutdown operation of finding time.
Goodly, as a kind of embodiment. Described signal processing module 10 comprises detection and transmits submodule block, is sent to information receiving module for pressure transmitter detects the low pressure value obtained of the suction opening of compressor in real time.
Goodly, as a kind of embodiment. The described default time cycle is more than or equal to 2 minutes.
Goodly, as a kind of embodiment. Described default time threshold is 5 seconds.
In embodiments of the present invention, described control mainboard controls primarily of DSP microprocessor (DigitalSignalProcessing, DSP) unicircuit. Goodly, described unicircuit (control mainboard) is integrated with " DSP " chip, described unicircuit is also integrated with and meets relevant circuit, the device (such as: the devices such as storer, input and output (I/O)) of each functions of modules of the embodiment of the present invention, the structure controlling DSP microprocessor on mainboard is illustrated see Fig. 2, Fig. 2. Described control mainboard is mainly used in judgement when starting and control treatment.
Those skilled in the art are to be understood that, developer can utilize assembly language or C language to carry out DSP functional development, or realized the setting configuring parameter (such as: the time cycle preset or default time threshold) by related software (such as: MATLAB6.5 version (Release13)) and realized the automatic process operation of startup control by steering routine. After program is burnt dsp chip by developer, relevant circuit and DSP are integrated on control mainboard and realize integral control circuit.
Further, the control mainboard that the air-cooled condensing group starter gear of the adaptation low temperature environment in the embodiment of the present invention adopts can select dsp chip, it is possible to use micro-control unit (MicroControlUnit, MCU) unicircuit controls. Goodly, described unicircuit being integrated with " AT89C51 " micro-chip, the embodiment of the present invention is not limited to use said chip, belongs to, about the selection of said chip, the common practise that those skilled in the art can understand, and this is repeated no more by the embodiment of the present invention.
The above embodiment only have expressed several enforcement modes of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to patent scope of the present invention. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the inventive concept of the premise these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. adapting to an air-cooled condensing group starting method for low temperature environment, described air-cooled condensing group comprises compressor, and the suction opening of described compressor is provided with pressure transmitter, it is characterised in that,
Step S10, control mainboard obtain the initiating signal of condensation unit;
Step S20, the protection of finding time triggering shielding control mainboard according to described initiating signal, and make the shielding failure of finding time of described condensation unit;
Step S30, when described condensation unit find time shielding failure, perform open compressor operation;
In step S20, the concrete steps of the protection of finding time of shielding control mainboard are as follows:
After step S100, reception compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then performs step S200; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope performs step S200 again;
Step S200, control mainboard receive the low pressure value being arranged on the pressure transmitter of compressor air suction mouth and detecting;
Step S300, control mainboard compare with described default evacuation pressure value according to described low pressure value, judge whether that execution finds time to protect shutdown operation; If then performing step S400; If not, then return step S200 and perform corresponding operation;
Step S400, control mainboard send protection instruction of finding time to compressor, and control compressor performs to find time shutdown operation.
2. the air-cooled condensing group starting method of adaptation low temperature environment according to claim 1, it is characterised in that, in described step S100, control mainboard also comprises the steps S110 after starting timing:
Step S110, pressure transmitter detect the low pressure value of the suction opening of compressor in real time and Detection Information are sent to control mainboard.
3. the air-cooled condensing group starting method of adaptation low temperature environment according to claim 1, it is characterised in that, in described step S300, according to described low pressure value with preset evacuation pressure value compare for:
Judge whether the low pressure value of current detection continues to be less than described default evacuation pressure value in default time threshold.
4. the air-cooled condensing group starting method of adaptation low temperature environment according to claim 1, it is characterised in that, the described default time cycle is more than or equal to 2 minutes.
5. the air-cooled condensing group starting method of adaptation low temperature environment according to claim 3, it is characterised in that, described default time threshold is 5 seconds.
6. one kind adapts to the air-cooled condensing group starter gear of low temperature environment; for controlling the compressor of air-cooled condensing group; it is characterized in that; described starter gear comprises the pressure transmitter on the suction opening connecting described compressor; and connect the control mainboard of described compressor; described control mainboard is used for the compressor to described air-cooled condensing group and performs to start control operation, and described control mainboard comprises signal processing module, information receiving module, judgement module and shuts down module, wherein:
Described signal processing module, after receiving compressor open command, control mainboard starts timing, and whether real-time judge compressor operating time has exceeded default time cycle scope, if the determination result is YES, then jump information receiver module performs corresponding operating; If judged result is no, then continue to judge, until compressor operating time has exceeded default time cycle scope jump information receiver module execution corresponding operating again;
Described information receiving module, for receiving the low pressure value that the pressure transmitter being arranged on compressor air suction mouth detects;
Described judgement module, for comparing with the evacuation pressure value preset according to described low pressure value, judges whether that execution is found time shutdown operation; If then redirect is shut down and is performed corresponding operating; If not, then return described information receiving module and perform corresponding operation;
Described shutdown module, for protection instruction of finding time to compressor, control compressor performs to find time shutdown operation.
7. the air-cooled condensing group starter gear of adaptation low temperature environment according to claim 6, it is characterised in that, described judgement module comprises and judges submodule block, wherein:
Whether described judgement submodule block, continue to be less than described default evacuation pressure value for judging the low pressure value of current detection in default time threshold, if then Predicated execution is found time shutdown operation; If not, then judge not perform shutdown operation of finding time.
8. the air-cooled condensing group starter gear of adaptation low temperature environment according to claim 6, it is characterized in that, described signal processing module comprises detection and transmits submodule block, is sent to information receiving module for pressure transmitter detects the low pressure value obtained of the suction opening of compressor in real time.
9. the air-cooled condensing group starter gear of adaptation low temperature environment according to claim 6, it is characterised in that, the described default time cycle is more than or equal to 2 minutes.
10. the air-cooled condensing group starter gear of adaptation low temperature environment according to claim 7, it is characterised in that, described default time threshold is 5 seconds.
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| CN201210385454.6A CN103727629B (en) | 2012-10-11 | 2012-10-11 | Air-cooled condensing unit starting method and device suitable for low-temperature environment |
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| CN105241144B (en) * | 2015-11-12 | 2017-12-26 | 珠海格力电器股份有限公司 | Shutdown method and system for low-temperature unit, low-temperature unit and refrigeration system |
| CN106440631B (en) * | 2016-10-08 | 2019-03-12 | 珠海格力电器股份有限公司 | Air extraction control method and device |
| CN110986453A (en) * | 2019-12-18 | 2020-04-10 | 珠海格力电器股份有限公司 | Refrigerator and compressor starting control method, device and system thereof |
| CN113606743B (en) * | 2021-08-10 | 2022-07-15 | 珠海格力电器股份有限公司 | Control method and device of air conditioning unit, storage medium and air conditioning unit |
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