CN111156651B - Gulp valve control method, compressor, air conditioner, memory and controller - Google Patents
Gulp valve control method, compressor, air conditioner, memory and controller Download PDFInfo
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- CN111156651B CN111156651B CN202010038245.9A CN202010038245A CN111156651B CN 111156651 B CN111156651 B CN 111156651B CN 202010038245 A CN202010038245 A CN 202010038245A CN 111156651 B CN111156651 B CN 111156651B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an aeration valve control method, an aeration valve, a compressor, an air conditioner, a memory and a programmable logic controller. The gulp valve control method comprises the following steps: detecting the outdoor environment temperature and the preset running frequency of the compressor in real time, comparing the detection result with a set threshold value, and dynamically adjusting the opening time of the gulp valve according to the comparison result. The invention can well coordinate the opening time of the air compensating valve, avoid the damage to the compressor caused by pressure mutation and ensure the reliability of the compressor.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an aeration valve control method, an aeration valve, a compressor, an air conditioner, a memory and a programmable logic controller.
Background
At present, the control of the enhanced vapor injection of the compressor is controlled by an air compensating valve which only has a switching function and cannot be adjusted. When the compressor runs at a high speed, if the air compensating valve is suddenly opened to enable a refrigerant to enter the compression cavity from the air injection enthalpy increasing port in the middle of the compressor to be mixed with low-pressure stage exhaust air, the air suction quantity of the high-pressure cylinder is suddenly increased, and the exhaust air of the low-pressure cylinder is also subjected to the resistance of air injection, so that the load of the compressor is suddenly increased, as a result, the service life of parts in the compressor is influenced, and the reliability of the compressor is greatly reduced. On the other hand, the gulp valve only has the function of a switch, the opening time is too early, the intermediate pressure does not reach the target requirement, the overflow of the compressor is easily caused, or the exhaust pressure and the exhaust temperature of the system cannot be quickly established.
In order to avoid the above phenomena, a control method of the air make-up valve of the compressor is urgently needed to coordinate the opening time of the air make-up valve, avoid the damage to the compressor caused by the sudden change of pressure and ensure the reliability of the compressor.
Disclosure of Invention
The invention provides an aeration valve control method, an aeration valve using the method, a compressor, an air conditioner, a memory and a programmable logic controller.
The invention adopts the technical scheme that a control method of the air compensating valve is provided, the method detects the outdoor environment temperature and the preset running frequency of the compressor in real time, compares the detection result with the set threshold value, and dynamically adjusts the opening time of the air compensating valve according to the comparison result.
The control method comprises the following steps:
judging outdoor ambient temperature tOuter ringThe range of the section;
when t1 is less than or equal to tOuter ring< T2, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor a;
when t2 is less than or equal to tOuter ring< T3, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor B;
when t isOuter ringThe opening time T of the gulp valve is more than or equal to T3Opening deviceIs an initial turn-on time TFirst stageThe product with the correction coefficient C;
the above t1, t2, and t3 are temperature setting thresholds.
Preferably, in the cooling operation mode, the temperature setting threshold t1 is 18 ℃, the temperature setting threshold t2 is 35 ℃, the temperature setting threshold t3 is 52 ℃, the value range of the correction coefficient a is 1.2-1.4, the value range of the correction coefficient B is 0.9-1, and the value range of the correction coefficient C is 0.6-0.8.
The control method further comprises the following steps:
judging the range of the operating frequency f of the compressor;
when f is more than or equal to f1 and is less than f2, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor a;
when f is more than or equal to f2 and is less than f3, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor b;
when f is more than or equal to f3, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor c;
the above f1, f2, and f3 set a threshold value for the compressor frequency.
Preferably, in the cooling operation mode, the frequency setting threshold f1 is 15Hz, the frequency setting threshold f2 is 25Hz, the frequency setting threshold f3 is 45Hz, the value range of the correction coefficient a is 1.2-1.3, the value range of the correction coefficient b is 0.9-1, and the value range of the correction coefficient c is 0.6-0.8.
Compared with the prior art, the invention has the following beneficial effects:
1. the air conditioner can intelligently adjust the opening time of the air supply valve under various outdoor environment temperatures, the stability of the air conditioner in the operation process is improved, the situation of pressure mutation does not occur in the opening process of the air supply valve, and the reliability of the compressor in the operation process is ensured;
2. aiming at the preset operation frequency of the compressor, the opening time of the air compensating valve is adjusted in real time, the risk of pressure mutation caused by the high operation frequency of the compressor is avoided, meanwhile, the frequency of the compressor is ensured to reach a certain value, and the exhaust temperature and the suction superheat degree of the whole system are ensured to meet the requirements.
Drawings
FIG. 1 is a schematic diagram of a dual stage compression system.
FIG. 2 is a control flow chart of the opening time correction of the gulp valve according to the present invention.
FIG. 3 is a control flow diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
The innovation points of the invention are as follows: by monitoring the outdoor environment temperature and the preset running frequency of the compressor in real time, the time for opening the air supplementing valve is corrected, and the reliability risks caused by overhigh load, sudden change of pressure of a compression cavity and the like in the running process of the compressor are avoided. Meanwhile, the technical scheme provided by the invention delays the opening time of the air compensating valve as much as possible, ensures the establishment of the exhaust temperature and the system pressure of the whole system, and ensures the stability of the system in the starting process. The correction mentioned above intelligently corrects the opening time of the gulp valve according to the outer ring temperature, the interval where the preset frequency of the compressor is located and the weight ratio.
As shown in fig. 1, a dual-stage compression cycle generally includes an outdoor unit and an indoor unit. The outdoor unit comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3 and a vapor-liquid separator 4. A first expansion valve 5, a flash evaporator 6 and a second expansion valve 7 are arranged in an outlet pipeline of the outdoor heat exchanger. A pipeline is led out from the top of the flash evaporator, an air compensating valve 8 is arranged on the pipeline, and the pipeline is communicated with a second stage air suction cavity of the compressor to compensate air for the compressor.
When the compressor runs at high speed, if the air compensating valve is suddenly opened, the low-pressure refrigerant is mixed with the gas discharged by the first stage of compression, so that the suction air quantity of the high-pressure cylinder is suddenly increased, and the gas discharged by the low-pressure cylinder is also subjected to the resistance of gas injection, so that the load of the compressor is suddenly increased, the service life of parts in the compressor is influenced, and the reliability of the compressor is seriously reduced.
As shown in fig. 2, the method for controlling the gulp valve of the compressor provided by the invention detects the outdoor environment temperature and the preset operation frequency of the compressor in real time, compares the detection result with the preset range, and dynamically adjusts the opening time of the gulp valve according to the comparison result.
Fig. 3 is a control flow chart of the opening time correction of the aeration valve in the cooling mode according to the present invention. Wherein, according to outdoor ambient temperature to the dynamic adjustment of gulp valve including:
judging outdoor ambient temperature tOuter ringThe range of the section;
when t1 is less than or equal to tOuter ring< T2, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor a;
when t2 is less than or equal to tOuter ring< T3, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor B;
when t isOuter ringThe opening time T of the gulp valve is more than or equal to T3Opening deviceIs an initial turn-on time TFirst stageThe product of the correction coefficient C.
The above-mentioned t1, t2, and t3 are temperature setting thresholds.
The dynamic adjustment of the gulp valve according to the preset operating frequency of the compressor comprises the following steps:
judging the range of the operating frequency f of the compressor;
when f is more than or equal to f1 and is less than f2, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor a;
when f is more than or equal to f2 and less than f3, the opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor b;
when f is more than or equal to f3, the opening time T of the gulp valve is the opening time TOpening deviceThe product of the correction coefficient c.
The above f1, f2, and f3 are compressor operation frequency setting thresholds.
The following description is made in conjunction with one embodiment of the present invention. The embodiment is the correction control of the opening time of the gulp valve in the refrigeration mode.
Starting up, inputting the opening time T of the initial gulp valveFirst stageThe initial starting time is determined according to parameters such as the actual machine type, the cold quantity, the refrigerant perfusion quantity and the like. Firstly, the outdoor environment temperature T is detectedOuter ringIf the outdoor environment temperature is more than or equal to 18 ℃ and less than 35 ℃, the opening time T of the air supply valve is determinedOpening device=TFirst stagexAA, wherein A represents a correction coefficient, the opening time after correction is rounded, the value range of A is 1.2-1.4 (an upper limit value is set here, because if the correction value exceeds 1.4, the pressure peak value reaches 4.2Mpa, the risk is large), the pressure reliability risk is low at low temperature, and the opening time of the gulp valve can be relatively prolonged; if the outdoor environment temperature is more than or equal to 35 ℃ and less than 52 ℃, the opening time T of the air supply valveOpening device=TFirst stageB, wherein B represents a correction coefficient, and the opening time after correction is rounded, wherein the value range of B is 0.9-1 (under the working condition, the opening time correction range does not need to be too large, and the initial exhaust and the initial pressure are both considered as much as possible), and under the working condition, the ambient temperature rises, the overall pressure rises, the opening time of the gulp valve is short, and the over-high load of the compressor is avoided; if the outdoor environment temperature is greater than or equal to 52 ℃, the opening time T of the air supply valveOpening device=TFirst stageAnd C, wherein C represents a correction coefficient, the opening time after correction is rounded, the value range of C is 0.6-0.8, under the working condition, the environment temperature is extremely high, the overall pressure is extremely increased, the opening time of the gulp valve is shorter, and the reliability risk is avoided.
After the environmental temperature is corrected, the corrected value T of the opening time of the gulp valve is outputOpening device. Because the actual operating frequency of the compressor is different under various environmental temperatures, the reached preset frequency of the compressor is different, and meanwhile, under the state of higher frequency, the risk of pressure mutation is higher at the moment of opening the air supply valve. Therefore, after the environmental temperature is corrected, the input preset frequency is corrected, the correction method is also zone control, and the specific steps comprise that if the input preset frequency is more than or equal to 15hz and less than 25hz, the final opening time T = T of the gulp valveOpening deviceX a, wherein a represents a correction coefficient, the opening time after correction is rounded, the value range of a is 1.2-1.3, the pressure reliability risk is low in a low-frequency operation state, and the opening time of the gulp valve can be relatively prolonged; if the frequency of the compressor is more than or equal to 25hz and less than 45hz, the final opening time T = T of the gulp valveOpening deviceB, wherein b represents a correction coefficient, the opening time after correction is rounded, the value range of b is 0.9-1, the frequency of the compressor is increased, the overall pressure is increased, the opening time of the air supply valve is short, and the over-high load of the compressor is avoided; if the frequency of the compressor is more than or equal to 45hz, the final opening time T = T of the gulp valveOpening deviceAnd x c, wherein c represents a correction coefficient, the opening time after correction is rounded, the value range of c is 0.6-0.8, the integral pressure is greatly increased under the frequency, the opening time of the gulp valve is shorter, and the reliability risk is avoided.
The above parameters are an embodiment of the present invention, and the actual temperature range, frequency range and correction value are determined by experiments according to the specific model, heating and cooling mode, etc.
The invention also provides an air conditioner, and the air conditioner compressor adopts the air compensation valve control method.
The invention also provides a memory and a programmable logic controller, wherein the memory is used for storing the computer program, the controller is used for operating the computer program, and the computer program executes the gulp valve control method when in operation.
The technical scheme provided by the invention determines the opening time of the air supply valve by judging the outdoor environment temperature and the preset frequency of the compressor in real time, avoids the reduction of the reliability of the compressor caused by the sudden increase of the load of the compressor in the opening process of the air supply valve by dynamically adjusting the opening time of the air supply valve, and simultaneously delays the opening time of the air supply valve as far as possible on the basis of ensuring the reliability, ensures the establishment of the exhaust temperature and pressure of the whole system and ensures the stability of the system in the starting process.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of an air compensating valve is characterized in that outdoor environment temperature and compressor running frequency are detected in real time, opening time is output according to an interval range where the outdoor environment temperature is located, and then the opening time of the air compensating valve is dynamically adjusted according to the interval range where the compressor running frequency is located.
2. The control method according to claim 1, characterized by comprising:
judging outdoor ambient temperature tOuter ringThe range of the section;
when t1 is less than or equal to tOuter ring< T2, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor a;
when t2 is less than or equal to tOuter ring< T3, opening time T of gulp valveOpening deviceIs an initial turn-on time TFirst stageThe product with the correction factor B;
when t isOuter ringThe opening time T of the gulp valve is more than or equal to T3Opening deviceIs an initial turn-on time TFirst stageThe product with the correction coefficient C;
the above t1, t2, and t3 are temperature setting thresholds.
3. The control method according to claim 2, characterized in that in the cooling operation mode, the temperature setting threshold t1 is 18 ℃, the temperature setting threshold t2 is 35 ℃, the temperature setting threshold t3 is 52 ℃, the correction coefficient a is in a range of 1.2-1.4, the correction coefficient B is in a range of 0.9-1, and the correction coefficient C is in a range of 0.6-0.8.
4. The control method according to claim 2 or 3, further comprising:
judging the range of the operating frequency f of the compressor;
when f is more than or equal to f1 and is less than f2, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor a;
when f is more than or equal to f2 and is less than f3, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor b;
when f is more than or equal to f3, the final opening time T of the gulp valve is the opening time TOpening deviceThe product with the correction factor c;
the above f1, f2, and f3 set a threshold value for the compressor frequency.
5. The control method according to claim 4, wherein in the cooling operation mode, the frequency setting threshold f1 is 15Hz, the frequency setting threshold f2 is 25Hz, the frequency setting threshold f3 is 45Hz, the correction coefficient a is in a range of 1.2-1.3, the correction coefficient b is in a range of 0.9-1, and the correction coefficient c is in a range of 0.6-0.8.
6. An aeration valve, characterized in that the aeration valve employs the aeration valve control method of any one of claims 1-5.
7. A compressor employing the gulp valve control method of any one of claims 1-5.
8. An air conditioner, characterized in that the compressor of the air conditioner adopts the gulp valve control method of any one of claims 1-5.
9. A memory for storing a computer program for performing the method of aeration valve control according to any one of claims 1-5.
10. A programmable logic controller for executing a computer program, wherein the computer program when executed performs the method of gulp valve control of any of claims 1-5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010038245.9A CN111156651B (en) | 2020-01-14 | 2020-01-14 | Gulp valve control method, compressor, air conditioner, memory and controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010038245.9A CN111156651B (en) | 2020-01-14 | 2020-01-14 | Gulp valve control method, compressor, air conditioner, memory and controller |
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| CN111156651A CN111156651A (en) | 2020-05-15 |
| CN111156651B true CN111156651B (en) | 2021-02-26 |
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| CN112033035B (en) * | 2020-09-10 | 2021-07-20 | 珠海格力电器股份有限公司 | Liquid spraying control method of refrigerating system and condensing unit |
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| JP2007032857A (en) * | 2005-07-22 | 2007-02-08 | Matsushita Electric Ind Co Ltd | Refrigerating device |
| CN103375935B (en) * | 2012-04-25 | 2016-03-23 | 珠海格力电器股份有限公司 | Two-stage compression circulation system and there is its control method of air-conditioner |
| CN103352763B (en) * | 2013-05-24 | 2015-12-23 | 潍柴动力股份有限公司 | The method for correcting of oil sprayer MAP curve, device and engine fuel supply system |
| CN206609075U (en) * | 2017-03-27 | 2017-11-03 | 广东美的制冷设备有限公司 | A kind of heat pump spray enthalpy system and air conditioner |
| CN109099610B (en) * | 2018-09-07 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air-supplementing enthalpy-increasing refrigerating system, air conditioner and air conditioner control method |
| CN110595020B (en) * | 2019-09-23 | 2020-11-20 | 珠海格力电器股份有限公司 | Air supplement control method and device for air conditioning system and computer readable storage medium |
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