CN109059211A - A kind of the frequency conversion system halt control method and controller of air injection enthalpy-increasing - Google Patents
A kind of the frequency conversion system halt control method and controller of air injection enthalpy-increasing Download PDFInfo
- Publication number
- CN109059211A CN109059211A CN201810818809.3A CN201810818809A CN109059211A CN 109059211 A CN109059211 A CN 109059211A CN 201810818809 A CN201810818809 A CN 201810818809A CN 109059211 A CN109059211 A CN 109059211A
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- Prior art keywords
- frequency conversion
- compressor
- conversion system
- heat exchanger
- air injection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
-
- 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
-
- 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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- 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)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention discloses the frequency conversion system halt control method and controller of a kind of air injection enthalpy-increasing, method the following steps are included: S1, in response to halt instruction, the compressor of frequency conversion system is downconverted to minimum operating frequency；S2, judge whether air injection enthalpy-increasing bypass electric expansion valve is in the open state, if so, executing S3-S6, otherwise execute S7-S8；S3, bypass electric expansion valve is closed；S4, in preset time range, compressor is maintained at minimum operating frequency；S5, until reach preset time range, stop operating instruction to compressor sending；S6, main road electric expansion valve is opened to maximum opening；S7, stop operating instruction to compressor sending；S8, main road electric expansion valve is opened to maximum opening.By the control to electric expansion valve and compressor, reach compressor when frequency conversion system is shut down not will shake the present invention, to guarantee the safety that the reliability of system pipeline, shutdown stability and compressor are again started up.
Description
Technical field
The present invention relates to electrical equipment more particularly to the frequency conversion system halt control methods and control of a kind of air injection enthalpy-increasing
Device processed.
Background technique
The control of frequency conversion air injection enthalpy-increasing heat pump or air-conditioning is defective in the prior art, and imbalance of pressure will lead to pressure when shutdown
The shake of contracting machine, and then copper pipe may be damaged.The especially frequency conversion system of air injection enthalpy-increasing has high, medium and low three kinds of pressure, is respectively
Pressure at expulsion, spray enthalpy pressure, pressure of inspiration(Pi), if control is bad, three kinds of pressure balances will lead to compress when compressor shutdown
Machine shake.There are two electric expansion valve, the sequence of movement and aperture when shutdown are extremely important for the control of air injection enthalpy-increasing frequency conversion heat pump,
Handle to obtain the bad conduit failure that will lead to connect when compressor shutdown, especially tiny jet pipeline.
Summary of the invention
In order to solve the problems in the existing technology, it shuts down and controls the present invention provides a kind of frequency conversion system of air injection enthalpy-increasing
Method processed and controller, the present invention reach compressor when frequency conversion system is shut down by the control to electric expansion valve and compressor
It not will shake, to guarantee the safety that the reliability of system pipeline, shutdown stability and compressor are again started up.The skill
Art scheme is as follows:
On the one hand, the present invention provides a kind of frequency conversion system halt control methods of air injection enthalpy-increasing, comprising the following steps:
The compressor of frequency conversion system is downconverted to minimum operating frequency by S1, the frequency conversion system halt instruction in response to receiving
Rate；
S2, judge whether air injection enthalpy-increasing bypass electric expansion valve is in the open state, if so, executing S3-S6, otherwise hold
Row S7-S8；
S3, the bypass electric expansion valve is closed；
S4, in preset time range, the compressor is maintained at the minimum operating frequency state；
S5, until reach above-mentioned preset time range, stop operating instruction to compressor sending；
S6, main road electric expansion valve is opened to maximum opening；
S7, stop operating instruction to compressor sending；
S8, main road electric expansion valve is opened to maximum opening.
Further, the frequency conversion system includes compressor, further includes indoor heat exchanger, outdoor heat exchanger, gas-liquid separation
Device, four-way reversing valve and economizer are equipped with main road electric expansion valve, the economizer between the economizer and outdoor heat exchanger
Bypass electric expansion valve is equipped between indoor heat exchanger；
Under cooling condition refrigerant circuit sequentially flow through outdoor heat exchanger, economizer, indoor heat exchanger, four-way reversing valve,
Gas-liquid separator, compressor, four-way reversing valve and outdoor heat exchanger；Refrigerant, which circuits sequentially, under heating condition flows through outdoor heat exchange
Device, four-way reversing valve, gas-liquid separator, compressor, four-way reversing valve, indoor heat exchanger, economizer and outdoor heat exchanger.
Further, the frequency conversion system is heat pump or air-conditioning.
Further, the minimum operating frequency in S1 and S4 is 15Hz.
Further, the preset time range in S4 and S5 is 10s.
Further, the pipeline between the gas-liquid separator and compressor be equipped with low tension switch, the compressor with
Pipeline between four-way reversing valve is equipped with high-voltage switch gear.
Further, the pipeline between the outdoor heat exchanger and economizer is equipped with device for drying and filtering, and the interior is changed
Device for drying and filtering also is provided on pipeline between hot device and economizer.
Further, the frequency conversion system further includes multiple temperature sensors, is respectively used to the exhaust temperature of detection compressor
Degree, the indoor coil pipe of indoor heat exchanger, the outdoor coil temperature of outdoor heat exchanger, indoor environment temperature, outdoor environment temperature
Degree, economizer inlet temperature and economizer outlet temperature.
In another aspect, shutting down controlling party using as described above the present invention provides a kind of frequency conversion system stop controller
Method carries out shutdown control to frequency conversion system.
Technical solution bring provided by the invention has the beneficial effect that:
A. bypass electric expansion valve is closed when low frequency operates before compressor shutdown, eliminates spray enthalpy pressure；
B. when compressor shuts down, main road electric expansion valve is opened to maximum opening, can rapid pressure equalization, from
And rapid pressure equalization when stopping compressor；
C. compressor not will shake when frequency conversion system is shut down, and guarantees the reliability of system pipeline, shuts down stability and pressure
The safety that contracting machine is again started up.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of the frequency conversion system halt control method of air injection enthalpy-increasing provided in an embodiment of the present invention；
Fig. 2 is mounting structure signal of the felt pad provided in an embodiment of the present invention in the fixing groove in distribution box on hanger
Figure；
Wherein, appended drawing reference includes: 1- compressor, 2- indoor heat exchanger, 3- outdoor heat exchanger, 4- gas-liquid separator, 5-
Four-way reversing valve, 6- economizer, 7- main road electric expansion valve, 8- bypass electric expansion valve, 9- low tension switch, 10- high-voltage switch gear,
11- device for drying and filtering, 12- temperature sensor.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
In one embodiment of the invention, a kind of frequency conversion system halt control method of air injection enthalpy-increasing is provided, referring to
Fig. 1, the control method the following steps are included:
The compressor of frequency conversion system is downconverted to minimum operating frequency by S1, the frequency conversion system halt instruction in response to receiving
Rate (preferably 15Hz)；
S2, judge whether air injection enthalpy-increasing bypass electric expansion valve is in the open state, if so, executing S3-S6, otherwise hold
Row S7-S8；
S3, the bypass electric expansion valve is closed；
The compressor is maintained at the minimum operating frequency shape by S4, in preset time range (such as 10s)
State；
S5, until reach above-mentioned preset time range, stop operating instruction to compressor sending；
S6, main road electric expansion valve is opened to maximum opening；
S7, stop operating instruction to compressor sending；
S8, main road electric expansion valve is opened to maximum opening.
Bypass electric expansion valve is closed (air injection enthalpy-increasing electronic expansion when low frequency operating before compressor shutdown by the present invention
Valve), so that three kinds of pressure (i.e. pressure at expulsion, spray enthalpy pressure and pressure of inspiration(Pi)) be made to become two kinds of pressure (i.e. pressures at expulsion and suction
Atmospheric pressure), since compressor low frequency operates, Suck and exhaust pressure difference itself is smaller, when compressor shuts down, then main road electricity
Sub- expansion valve is opened to maximum opening, can rapid pressure equalization, so that rapid pressure equalization when stopping compressor, prevents from pressing
Continuous shake when contracting machine stops, leads to the damage of compressor connecting line.
Controlled device, that is, frequency conversion system of the invention is heat pump or air-conditioning, and structural schematic diagram is as shown in Fig. 2, in addition to packet
Compressor 1 is included, the frequency conversion system further includes indoor heat exchanger 2, outdoor heat exchanger 3, gas-liquid separator 4,5 and of four-way reversing valve
Economizer 6 is equipped with main road electric expansion valve 7, the economizer 6 and indoor heat exchange between the economizer 6 and outdoor heat exchanger 3
Bypass electric expansion valve 8 is equipped between device 2；
Refrigerant, which circuits sequentially, under cooling condition flows through outdoor heat exchanger 3, economizer 6, indoor heat exchanger 2, four-way commutation
Valve 5, gas-liquid separator 4, compressor 1, four-way reversing valve 5 and outdoor heat exchanger 3, referring to fig. 2 in black arrows direction；System
Refrigerant, which circuits sequentially, under thermal condition flows through outdoor heat exchanger 3, four-way reversing valve 5, gas-liquid separator 4, compressor 1, four-way and changes
To valve 5, indoor heat exchanger 2, economizer 6 and outdoor heat exchanger 3, referring to fig. 2 in hollow arrow direction.
Preferably, the pipeline between the gas-liquid separator 4 and compressor 1 is equipped with low tension switch 9, the compressor 1
Pipeline between four-way reversing valve 5 is equipped with high-voltage switch gear 10, on the pipeline between the outdoor heat exchanger 3 and economizer 6
Equipped with device for drying and filtering 11, device for drying and filtering 11 also is provided on the pipeline between the indoor heat exchanger 2 and economizer 6.It is preferred that
Ground, the frequency conversion system further include multiple temperature sensors 12, are respectively used to delivery temperature, the interior heat exchange of detection compressor 1
The indoor coil pipe of device 2, the outdoor coil temperature of outdoor heat exchanger 3, indoor environment temperature, outdoor environment temperature, economizer
Inlet temperature and economizer outlet temperature.
In another embodiment of the present invention, a kind of frequency conversion system stop controller is additionally provided, using as described above
Halt control method shutdown control is carried out to frequency conversion system.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of frequency conversion system halt control method of air injection enthalpy-increasing, which comprises the following steps:
S1, the frequency conversion system halt instruction in response to receiving, are downconverted to minimum operating frequency for the compressor of frequency conversion system；
S2, judge whether air injection enthalpy-increasing bypass electric expansion valve is in the open state, if so, executing S3-S6, otherwise execute
S7-S8；
S3, the bypass electric expansion valve is closed；
S4, in preset time range, the compressor is maintained at the minimum operating frequency state；
S5, until reach above-mentioned preset time range, stop operating instruction to compressor sending；
S6, main road electric expansion valve is opened to maximum opening；
S7, stop operating instruction to compressor sending；
S8, main road electric expansion valve is opened to maximum opening.
2. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 1, which is characterized in that the frequency conversion system
System includes compressor (1), further includes indoor heat exchanger (2), outdoor heat exchanger (3), gas-liquid separator (4), four-way reversing valve (5)
With economizer (6), main road electric expansion valve (7) are equipped between the economizer (6) and outdoor heat exchanger (3), the economizer
(6) bypass electric expansion valve (8) are equipped between indoor heat exchanger (2)；
Refrigerant, which circuits sequentially, under cooling condition flows through outdoor heat exchanger (3), economizer (6), indoor heat exchanger (2), four-way and changes
To valve (5), gas-liquid separator (4), compressor (1), four-way reversing valve (5) and outdoor heat exchanger (3)；Refrigerant under heating condition
It circuits sequentially and flows through outdoor heat exchanger (3), four-way reversing valve (5), gas-liquid separator (4), compressor (1), four-way reversing valve
(5), indoor heat exchanger (2), economizer (6) and outdoor heat exchanger (3).
3. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 1, which is characterized in that the frequency conversion system
System is heat pump or air-conditioning.
4. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 1, which is characterized in that in S1 and S4
The minimum operating frequency is 15Hz.
5. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 1, which is characterized in that in S4 and S5
The preset time range is 10s.
6. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 2, which is characterized in that the gas-liquid point
Be equipped with low tension switch (9) from the pipeline between device (4) and compressor (1), the compressor (1) and four-way reversing valve (5) it
Between pipeline be equipped with high-voltage switch gear (10).
7. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 2, which is characterized in that the outdoor is changed
Pipeline between hot device (3) and economizer (6) is equipped with device for drying and filtering (11), the indoor heat exchanger (2) and economizer (6)
Between pipeline on also be provided with device for drying and filtering (11).
8. the frequency conversion system halt control method of air injection enthalpy-increasing according to claim 2, which is characterized in that the frequency conversion system
System further includes multiple temperature sensors (12), is respectively used to the delivery temperature of detection compressor (1), the room of indoor heat exchanger (2)
Inner coil pipe temperature, the outdoor coil temperature of outdoor heat exchanger (3), indoor environment temperature, outdoor environment temperature, economizer inlet temperature
Degree and economizer outlet temperature.
9. a kind of frequency conversion system stop controller, which is characterized in that utilize shutdown control described in any one of claim 1-8
Method processed carries out shutdown control to frequency conversion system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818809.3A CN109059211B (en) | 2018-07-24 | 2018-07-24 | Shutdown control method and controller for variable frequency system with enhanced vapor injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810818809.3A CN109059211B (en) | 2018-07-24 | 2018-07-24 | Shutdown control method and controller for variable frequency system with enhanced vapor injection |
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| Publication Number | Publication Date |
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| CN109059211A true CN109059211A (en) | 2018-12-21 |
| CN109059211B CN109059211B (en) | 2021-05-07 |
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| CN201810818809.3A Active CN109059211B (en) | 2018-07-24 | 2018-07-24 | Shutdown control method and controller for variable frequency system with enhanced vapor injection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460771A (en) * | 2020-11-30 | 2021-03-09 | 珠海格力电器股份有限公司 | Compressor control method, device and system and storage medium |
| CN113188269A (en) * | 2020-01-13 | 2021-07-30 | 上海海立电器有限公司 | Shutdown control method and device of enthalpy-increasing heat pump system |
| CN114576825A (en) * | 2020-11-30 | 2022-06-03 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and readable storage medium |
| US20220221210A1 (en) * | 2019-10-31 | 2022-07-14 | Daikin Industries, Ltd. | Refrigeration apparatus |
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| CN114576825A (en) * | 2020-11-30 | 2022-06-03 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and readable storage medium |
| CN114576825B (en) * | 2020-11-30 | 2023-11-28 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and readable storage medium |
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