CN104833066B - A kind of mode switching method of frequency conversion heat pump - Google Patents
A kind of mode switching method of frequency conversion heat pump Download PDFInfo
- Publication number
- CN104833066B CN104833066B CN201510202363.8A CN201510202363A CN104833066B CN 104833066 B CN104833066 B CN 104833066B CN 201510202363 A CN201510202363 A CN 201510202363A CN 104833066 B CN104833066 B CN 104833066B
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- mode
- temperature
- heat pump
- target temperature
- inflow temperature
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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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
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
-
- 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
- F25B2600/021—Inverters therefor
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of mode switching method of frequency conversion heat pump, include following steps：Default mode of operation is controlled according to the difference of inflow temperature and target temperature；When detecting that inflow temperature reaches target temperature, control unit working frequency is in lowest operating frequency；The transformation working pattern when the difference for detecting inflow temperature and target temperature is 0.5 1 DEG C.The inventive method passes through the pattern switching to frequency conversion heat pump; inflow temperature caused by restarting unit after constant temperature is shut down is avoided to fluctuate; and compressor operating is kept in the process, avoids and continually stops machine, ensures the stable service life with compressor of system；Meanwhile the switching of four-way valve is carried out under lowest operating frequency, is avoided rush of current caused by four-way valve switches at high frequencies, is extended the service life of four-way valve, further increases the stability of system.The present invention can be widely applied to VFC field as a kind of mode switching method of frequency conversion heat pump.
Description
Technical field
The present invention relates to VFC field, especially a kind of mode switching method of frequency conversion heat pump.
Background technology
When conventional frequency conversion heat pump is heated/freezed, after inflow temperature reaches target temperature, heat pump can keep low frequency
Constant temperature is shut down after operation, but such control method for frequency can have problems with actual use：
After 1. system constant temperature is shut down, heating/refrigeration, inflow temperature are difficult to keep stably, so as to have impact on user's again again
Comfort level；
2. high frequent can be caused to stop machine, system stable operation is not only have impact on, and shortens making for compressor
Use the life-span.
The content of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is：A kind of realize is provided to reduce fluctuating temperature, ensure system
The mode switching method of frequency conversion heat pump that is stable, extending the compressor life-span.
The technical solution adopted in the present invention is：A kind of mode switching method of frequency conversion heat pump, includes following steps：
A, during source pump start work, the difference of inflow temperature and target temperature is calculated, and work is controlled according to difference
Pattern is refrigeration or heating mode；
B, inflow temperature is detected by temperature sensor；
C, when detecting that inflow temperature reaches target temperature, unit working frequency is controlled in lowest operating frequency, and
Continued to run with current operation mode；
D, when unit continues to run with lowest operating frequency and detects inflow temperature and the difference of target temperature is
At 0.5-1 DEG C, control unit is changed to mode of operation.
Further, in the step A, when inflow temperature is less than target temperature, control unit works in heating mode；When
When inflow temperature is more than target temperature, control unit works in refrigeration mode.
Further, in the step D, the method changed to mode of operation is control four-way valve and blower fan turning.
Further, in the step D, when unit is run in heating mode, detect that inflow temperature is higher than target temperature
At 0.5-1 DEG C, control unit is converted into refrigeration mode from heating mode.
Further, in the step D, when unit is run in refrigeration mode, detect that inflow temperature is lower than target temperature
At 0.5-1 DEG C, control unit is converted into heating mode from refrigeration mode.
Further, the working frequency and the difference of inflow temperature and target temperature when unit works are in direct ratio.
The beneficial effects of the invention are as follows：The inventive method to the pattern switching of frequency conversion heat pump by instead of in the prior art
Shutdown operation, avoid inflow temperature caused by restarting unit after constant temperature is shut down and fluctuate, and keep in the process
Compressor operating, avoid and continually stop machine, ensure the stable service life with compressor of system；Meanwhile four-way valve is cut
Changing is carried out under lowest operating frequency, is avoided rush of current caused by four-way valve switches at high frequencies, is extended four-way
The service life of valve, further increase the stability of system.
Brief description of the drawings
Fig. 1 is the step flow chart of the inventive method；
Fig. 2 is that heating mode of the present invention turns refrigeration mode schematic diagram；
Fig. 3 is refrigeration mode transformation of ownership heat pattern schematic diagram of the present invention.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
A kind of reference picture 1, mode switching method of frequency conversion heat pump, includes following steps：
A, during source pump start work, the difference of inflow temperature and target temperature is calculated, and work is controlled according to difference
Pattern is refrigeration or heating mode；
B, inflow temperature is detected by temperature sensor；
C, when detecting that inflow temperature reaches target temperature, unit working frequency is controlled in lowest operating frequency, and
Continued to run with current operation mode；
D, when unit continues to run with lowest operating frequency and detects inflow temperature and the difference of target temperature is
At 0.5-1 DEG C, control unit is changed to mode of operation.
It is further used as preferred embodiment, in the step A, when inflow temperature is less than target temperature, control machine
Group works in heating mode；When inflow temperature is more than target temperature, control unit works in refrigeration mode.
It is further used as preferred embodiment, in the step D, the method changed to mode of operation is control four
Port valve and blower fan turning.
Reference picture 2, is further used as preferred embodiment, in the step D, when unit is run in heating mode,
When detecting that inflow temperature is higher than target temperature 0.5-1 DEG C, control unit is converted into refrigeration mode from heating mode.
Reference picture 3, is further used as preferred embodiment, in the step D, when unit is run in refrigeration mode,
When detecting that inflow temperature is lower than target temperature 0.5-1 DEG C, control unit is converted into heating mode from refrigeration mode.
Preferred embodiment is further used as, working frequency and the difference of inflow temperature and target temperature when unit works
It is worth in direct ratio.
Illustrate a handoff procedure of frequency conversion heat pump by taking Fig. 2 as an example：Inflow temperature is less than target temperature when unit works first
Degree, acquiescence are operated in heating mode；With the rise of inflow temperature, its reduction with target temperature difference, the work frequency of unit
Rate decreases, and when detecting that inflow temperature reaches target temperature, control unit is when low-limit frequency is run and continues one section
Between；Because unit is still run in heating mode, inflow temperature continues to raise, until the difference of inflow temperature and target temperature reaches
At 0.5-1 DEG C, four-way valve and blower fan commutation are controlled, completes conversion of the heating mode to refrigeration mode.
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalents on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (6)
- A kind of 1. mode switching method of frequency conversion heat pump, it is characterised in that：Include following steps：A, during source pump start work, the difference of inflow temperature and target temperature is calculated, and mode of operation is controlled according to difference For refrigeration or heating mode；B, inflow temperature is detected by temperature sensor；C, when detecting that inflow temperature reaches target temperature, unit working frequency is controlled in lowest operating frequency, and current Continued to run with mode of operation；D, when unit continues to run with lowest operating frequency and detects inflow temperature and the difference of target temperature is 0.5-1 DEG C When, control unit is changed to mode of operation.
- A kind of 2. mode switching method of frequency conversion heat pump according to claim 1, it is characterised in that：In the step A, when When inflow temperature is less than target temperature, control unit works in heating mode；When inflow temperature is more than target temperature, control machine Group works in refrigeration mode.
- A kind of 3. mode switching method of frequency conversion heat pump according to claim 1, it is characterised in that：It is right in the step D The method that mode of operation is changed is control four-way valve and blower fan turning.
- A kind of 4. mode switching method of frequency conversion heat pump according to claim 1, it is characterised in that：In the step D, when Unit is when heating mode is run, and when detecting that inflow temperature is higher than target temperature 0.5-1 DEG C, control unit turns from heating mode Change refrigeration mode into.
- A kind of 5. mode switching method of frequency conversion heat pump according to claim 1, it is characterised in that：In the step D, when Unit is when refrigeration mode is run, and when detecting that inflow temperature is lower than target temperature 0.5-1 DEG C, control unit turns from refrigeration mode Change heating mode into.
- A kind of 6. mode switching method of frequency conversion heat pump according to claim 1, it is characterised in that：Work when unit works The difference of working frequency and inflow temperature and target temperature is in direct ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202363.8A CN104833066B (en) | 2015-04-23 | 2015-04-23 | A kind of mode switching method of frequency conversion heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202363.8A CN104833066B (en) | 2015-04-23 | 2015-04-23 | A kind of mode switching method of frequency conversion heat pump |
Publications (2)
| Publication Number | Publication Date |
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| CN104833066A CN104833066A (en) | 2015-08-12 |
| CN104833066B true CN104833066B (en) | 2017-11-14 |
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| CN201510202363.8A Active CN104833066B (en) | 2015-04-23 | 2015-04-23 | A kind of mode switching method of frequency conversion heat pump |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106766214B (en) * | 2016-11-11 | 2019-11-01 | 广东芬尼克兹节能设备有限公司 | A kind of water temperature frequency modulation control method |
| CN109386998B (en) * | 2017-08-04 | 2020-12-01 | 奥克斯空调股份有限公司 | Protection control method for variable frequency air conditioner |
| CN107763887B (en) * | 2017-11-03 | 2020-08-04 | 广东芬尼能源技术有限公司 | Energy level control method and control device for dual-system heat pump unit |
| CN108224702B (en) * | 2017-12-18 | 2020-08-18 | 青岛海尔空调电子有限公司 | Control method and device for central air-conditioning system |
| CN108626778B (en) * | 2018-05-09 | 2021-02-23 | 广东瑞星新能源科技有限公司 | Control method of energy-saving variable-frequency heating heat pump |
| CN108981219A (en) * | 2018-06-11 | 2018-12-11 | 陈燕燕 | A kind of control method of full-time energy-efficient frequency conversion water heating heat pump |
| CN109611989B (en) * | 2018-12-12 | 2021-02-05 | 广东智科电子股份有限公司 | Device and method for synchronously adjusting temperature of cold and hot water machine and frequency of press |
| CN112393320B (en) * | 2019-08-16 | 2022-09-02 | 广东Tcl智能暖通设备有限公司 | Compressor rotation speed control method based on heat pump heating machine and heat pump heating machine |
| CN111649490B (en) * | 2020-06-12 | 2021-07-23 | 佛山市顺德区资乐电器有限公司 | Control system and control method of heat pump water heater |
| CN114234371B (en) * | 2021-12-15 | 2023-01-10 | 珠海格力电器股份有限公司 | Air source heat pump water machine, control method and device thereof and storage medium |
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| CN201527097U (en) * | 2009-11-19 | 2010-07-14 | 苏州大学 | Water source heat pump water heater |
| CN201935331U (en) * | 2010-12-30 | 2011-08-17 | 山东朗进科技股份有限公司 | Direct current frequency conversion controller of automotive air conditioners |
| CN104457073A (en) * | 2014-11-21 | 2015-03-25 | 广东芬尼克兹节能设备有限公司 | Frequency conversion control method |
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| JPH04320753A (en) * | 1991-04-18 | 1992-11-11 | Toshiba Corp | Air conditioner |
| CN2411438Y (en) * | 1999-12-13 | 2000-12-20 | 张委东 | Frequency conversion air-cooled type heat pump cooling water device |
| CN1818517A (en) * | 2005-12-19 | 2006-08-16 | 东莞市广大制冷有限公司 | Adjusting method of cool-water screw precisioning air conditioner system |
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| CN104833066A (en) | 2015-08-12 |
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