CN107449173A - A kind of domestic multi-connection formula frequency changer oil return control system - Google Patents
A kind of domestic multi-connection formula frequency changer oil return control system Download PDFInfo
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- CN107449173A CN107449173A CN201710476431.9A CN201710476431A CN107449173A CN 107449173 A CN107449173 A CN 107449173A CN 201710476431 A CN201710476431 A CN 201710476431A CN 107449173 A CN107449173 A CN 107449173A
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- Prior art keywords
- oil return
- heat exchanger
- control system
- frequency
- indoor heat
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- 238000004378 air conditioning Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 84
- 239000010687 lubricating oil Substances 0.000 abstract description 11
- 239000003507 refrigerant Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- 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
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- 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 domestic multi-connection formula frequency changer oil return control system, includes four-way valve, outdoor heat exchanger, the indoor heat exchanger group by least three indoor heat exchangers compose in parallel, compressor, gas-liquid separator, oil eliminator, part flow arrangement, multiple throttling arrangements and several temperature-sensitive bags；Solve the problems, such as that air-conditioning system caused by oil return of the air-conditioning system under the conditions of some rugged environments protects chaser by above-mentioned oil return control system; it ensure that air-conditioning system being capable of stable operation simultaneously; ensure that lubricating oil can be flowed back to smoothly in compressor 4, so as to improve the service life of product.
Description
Technical field
The present invention relates to the technical field of domestic air conditioner, refers in particular to a kind of domestic multi-connection formula frequency changer oil return control system
System.
Background technology
In general, air-conditioning work run in, it is necessary to by lubricating oil to compressor operation during soften, so as to protect
Normal operation is held, otherwise compressor easily wears because overheat produces, or even burns out.Due in general family expenses split air conditioner one-to-one
All-product line it is shorter, most lubricating oil can be smoothly flowed back in compressor with refrigerant, therefore, problem of oil return
Appear in mostly in connected machine.
Connected machine is commonly called as " one drag more ", refers to an outdoor unit, and the indoor set of two or more is connected by pipe arrangement,
Pass through air-cooled heat exchange and the frequency-conversion air-conditioning system of the refrigeration form of direct two kinds of combinations of inner and outside of evaporation and heat-exchange.Domestic variable frequency multi-connected machine
Its pipe arrangement of product is longer, and drop is bigger, and bend part is more, causes the place of trapped fuel more, with the increase of running time,
The lubricating oil gathered in system pipeline can be more and more, and in the course of time, compressor will damage because lubricating oil is lacked
The problem of.Secondly, domestic multi-connection formula frequency changer species in the market is various, but oil return scheme is essentially all based on lifting
Compressor operating frequency and the aperture of electric expansion valve are adjusted, and so as to force to realize oil return, this control mode can be at some
Oil return is realized under conventional operating mode, but in the case of some excess loads, it is impossible to ensure air-conditioning system can stable operation, very
To that may trigger, air-conditioning system is out of service.
Therefore, the problem of oil return of solution connected machine, which turns into, ensures that connected machine is capable of the important of normal operation and asked
Topic.
The content of the invention
It is applied to multi-state it is an object of the invention to overcome the deficiencies of the prior art and provide one kind, ensures stable operation
Domestic multi-connection formula frequency changer oil return control system
In order to realize above-mentioned purpose, a kind of domestic multi-connection formula frequency changer oil return control system provided by the present invention, include
Four-way valve, outdoor heat exchanger, the indoor heat exchanger group by least three indoor heat exchangers compose in parallel, compressor, gas-liquid separation
Device, oil eliminator, part flow arrangement, multiple throttling arrangements and several temperature-sensitive bags, first port and the outdoor of the four-way valve are changed
Hot device connection；The second port of the four-way valve connects with indoor heat exchanger group；3rd port of the four-way valve separates with oil
The exhaust outlet connection of device；4th port of the four-way valve connects with the air inlet of gas-liquid separator；The exhaust of the compressor
The inlet communication of mouth and oil eliminator；The air inlet of the compressor respectively with the oil return opening of oil eliminator and gas-liquid separator
Exhaust outlet connects；The outdoor heat exchanger connects with part flow arrangement, and the part flow arrangement connects with multiple outdoor heat exchangers respectively,
Wherein, each it is provided with throttling arrangement between the outdoor heat exchanger and part flow arrangement；Multiple temperature-sensitive bags are set respectively
In outdoor heat exchanger, each indoor heat exchanger, gas-liquid separator exhaust outlet and exhaust outlet of compressor.
Further, the indoor heat exchanger group includes three indoor heat exchangers.
A kind of control method of domestic multi-connection formula frequency changer oil return control system, it is characterised in that：Include following steps：
S1. during air-conditioning system energization operation, oil return control system detects the running frequency of compressor, judges to press according to testing result
Whether the running frequency of contracting machine is less than 50Hz, wherein, if the running frequency of compressor is less than 50Hz, start timing；If compression
The running frequency of machine is higher than 50Hz, then timing is reset.
S2. when compressor with 50Hz running frequency continuous service 3h, then oil return control system enter oil return pattern.
S3. under oil return pattern, oil return control system detection be arranged at the temperature value of temperature-sensitive bag at outdoor heat exchanger with
Judge the operating condition of outdoor heat exchanger, wherein, if outdoor heat exchanger is under excess load operating mode, oil return control system is not entered then
Row oil return is handled；If outdoor heat exchanger is under conventional operating mode, oil return control system then carries out oil return processing.
S4. oil return control system detects the operational mode of indoor heat exchanger and runs number of units to judge corresponding return successively
Oily frequency, so as to control compressor to run 3min with the oil return frequency, meanwhile, corresponding part flow arrangement is adjusted in the process of running
Folding and aperture with throttling arrangement.
S5. after 3min is run, oil return control system control compressor recovers normal running frequency, and continually and steadily transports
OK, meanwhile, oil return control system timing, which is reset, completes oil return processing.
Further, in cooling mode, oil return control system is according to the operation platform of indoor heat exchanger for the indoor heat exchanger
The corresponding oil return frequency of numerical control system, wherein, the oil return frequency of only one indoor heat exchanger operation is 30Hz；Two indoor heat exchangers
The oil return frequency of operation is 50Hz；The oil return frequency of whole indoor heat exchanger operations is 68Hz.
Further, in a heating mode, oil return control system is according to the operation platform of indoor heat exchanger for the indoor heat exchanger
The corresponding oil return frequency of numerical control system, wherein, the oil return frequency of only one indoor heat exchanger operation is 30Hz；Two indoor heat exchangers
The oil return frequency of operation is 50Hz；The oil return frequency of whole indoor heat exchanger operations is 70Hz.
Further, the oil return control system detects the temperature-sensitive bag temperature at outdoor heat exchanger to judge outdoor heat exchanger
Operating condition, wherein, when detection temperature in cooling mode, detection temperature is higher than 20 DEG C higher than 40 DEG C or in a heating mode, then
For excess load operating mode；When detection temperature in cooling mode, detection temperature is less than 20 DEG C less than 40 DEG C or in a heating mode, then
For conventional operating mode.
The present invention uses above-mentioned scheme, and its advantage is：Ensure that the lubricating oil of air-conditioning system smooth can return
Return in compressor；Ensure the operation that air-conditioning system can be stablized under multi-state；Extend the service life of compressor.
Brief description of the drawings
Fig. 1 is the structural representation of the oil return control system of the present invention.
Wherein, 1- four-way valves, 2- outdoor heat exchangers, 3- indoor heat exchangers, 4- compressors, 5- gas-liquid separators, 6- oils
From device, 7- part flow arrangements, 8- throttling arrangements, 9- temperature-sensitive bags.
Embodiment
With reference to specific embodiment, the present invention is further illustrated.
Referring to shown in accompanying drawing 1, in the present embodiment, a kind of domestic multi-connection formula frequency changer oil return control system, include four
Port valve 1, outdoor heat exchanger 2,3 groups of indoor heat exchanger, compressor 4, the gas-liquid separator composed in parallel by three indoor heat exchangers 3
5th, oil eliminator 6, part flow arrangement 7, multiple throttling arrangements 8 and several temperature-sensitive bags 9, the first port of the four-way valve 1 and room
External heat exchanger 2 connects；The second port of the four-way valve 1 connects for 3 groups with indoor heat exchanger；3rd port of the four-way valve 1
Connected with the exhaust outlet of oil eliminator 6；4th port of the four-way valve 1 connects with the air inlet of gas-liquid separator 5；The pressure
The exhaust outlet of contracting machine 4 and the inlet communication of oil eliminator 6；The air inlet of the compressor 4 oil return opening with oil eliminator 6 respectively
Connected with the exhaust outlet of gas-liquid separator 5；The outdoor heat exchanger 2 connects with part flow arrangement 7, the part flow arrangement 7 respectively with
Multiple outdoor heat exchangers 2 connect, wherein, each it is provided with throttling arrangement 8 between the outdoor heat exchanger 2 and part flow arrangement 7；
Multiple temperature-sensitive bags 9 are respectively arranged at outdoor heat exchanger 2, each indoor heat exchanger 3, the exhaust outlet of gas-liquid separator 5 and pressure
The exhaust outlet of contracting machine 4.
Because the outdoor heat exchanger 2 of connected machine configures bigger, air-conditioning system is singly opening the feelings of an indoor heat exchanger 3
Under condition, the running frequency of compressor 4 is than relatively low, and the refrigerant circulation of system is fewer, and pressure is smaller, and unnecessary refrigerant returns dilute
The lubricating oil of compressor 4 is released, the running frequency of compressor 4 for such as now forcing to improve carries out oil return and may result in system pressure mistake
Trigger protection shutdown greatly, also, the lubricating oil after shutdown at low pressure still can not be flowed back to normally in compressor 4, long-term fortune
Guild causes compressor 4 to lack lubricating oil and cause to wear, or even burns out, therefore, ensure system stable operation premise to
Lower proposition following methods, in conjunction with specific implementation to the oil return of domestic multi-connection formula frequency changer oil return control system control method make into
One step explanation.
A kind of control method of domestic multi-connection formula frequency changer oil return control system, includes following steps：
S1. during air-conditioning system energization operation, oil return control system detects the running frequency of compressor 4, is judged according to testing result
Whether the running frequency of compressor 4 is less than 50Hz, wherein, if the running frequency of compressor 4 is less than 50Hz, start timing；If
The running frequency of compressor 4 is higher than 50Hz, then timing is reset.
S2. when compressor 4 with 50Hz running frequency continuous service 3h, then oil return control system enter oil return pattern.
S3. under oil return pattern, oil return control system detection is arranged at the temperature value of the temperature-sensitive bag 9 at outdoor heat exchanger 2
To judge the operating condition of outdoor heat exchanger 2, wherein, if outdoor heat exchanger 2 is under excess load operating mode, oil return control system is then
Handled without oil return；If outdoor heat exchanger 2 is under conventional operating mode, oil return control system then carries out oil return processing.
S4. oil return control system detects the operational mode of indoor heat exchanger 3 and runs number of units to judge accordingly successively
Oil return frequency, so as to control compressor 4 to run 3min with the oil return frequency, meanwhile, the corresponding shunting of regulation in the process of running
The folding of device 7 and throttling arrangement 8 and aperture.
S5. after 3min is run, oil return control system control compressor 4 recovers normal running frequency, and continually and steadily
Operation, meanwhile, oil return control system timing, which is reset, completes oil return processing.
Preferably, in the present embodiment, carried out judging outdoor according to the detection temperature of the temperature-sensitive bag 9 at outdoor heat exchanger 2
The operating condition of heat exchanger 2, wherein, when detection temperature is higher than 40 DEG C in cooling mode or detection temperature is high in a heating mode
In 20 DEG C, then it is determined as excess load operating mode, under such excess load operating mode, the refrigerant pressure of air-conditioning system is very big, so that
Lubricating oil can smoothly flow back to compressor 4, enter without carrying out oil return processing；When detection temperature is less than 40 in cooling mode
DEG C or in a heating mode detection temperature be less than 20 DEG C, then be determined as conventional operating mode.
Preferably, in the present embodiment, when indoor heat exchanger 3 in cooling mode, oil return control system is changed according to interior
The corresponding oil return frequency of operation unit number control of hot device 3, wherein, the oil return frequency that only an indoor heat exchanger 3 is run is 30Hz；
The oil return frequency that two indoor heat exchangers 3 are run is 50Hz；The oil return frequency that whole indoor heat exchangers 3 are run is 68Hz.Work as room
In a heating mode, oil return control system is according to the corresponding oil return frequency of the operation unit number control of indoor heat exchanger 3 for interior heat exchanger 3
Rate, wherein, the oil return frequency that only an indoor heat exchanger 3 is run is 30Hz；The oil return frequency that two indoor heat exchangers 3 are run is
50Hz；The oil return frequency that whole indoor heat exchangers 3 are run is 70Hz.
In the present embodiment, solve air-conditioning system returning under the conditions of some rugged environments by oil return control system
Air-conditioning system caused by oil protects the problem of chaser, while ensure that air-conditioning system being capable of stable operation, it is ensured that lubricating oil can
Smoothly flow back in compressor 4, so as to improve the service life of product.
Embodiment described above is only presently preferred embodiments of the present invention, not does any formal limit to the present invention
System.Any those skilled in the art, without departing from the scope of the technical proposal of the invention, utilize the skill of the disclosure above
Art content makes more possible variations and retouching to technical solution of the present invention, or modification is the equivalent embodiment of the present invention.
Therefore all contents without departing from technical solution of the present invention, the equivalent equivalence changes that the thinking according to the present invention is made, it all should be covered by
In protection scope of the present invention.
Claims (6)
1. a kind of domestic multi-connection formula frequency changer oil return control system, includes four-way valve（1）, outdoor heat exchanger（2）, by least three
Platform indoor heat exchanger（3）The indoor heat exchanger composed in parallel（3）Group, compressor（4）, gas-liquid separator（5）, oil eliminator（6）、
Part flow arrangement（7）, multiple throttling arrangements（8）With several temperature-sensitive bags（9）, it is characterised in that：The four-way valve（1）First end
Mouth and outdoor heat exchanger（2）Connection；The four-way valve（1）Second port and indoor heat exchanger（3）Group connection；The four-way valve
（1）The 3rd port and oil eliminator（6）Exhaust outlet connection；The four-way valve（1）The 4th port and gas-liquid separator（5）
Air inlet connection；The compressor（4）Exhaust outlet and oil eliminator（6）Inlet communication；The compressor（4）Air inlet
Mouth respectively with oil eliminator（6）Oil return opening and gas-liquid separator（5）Exhaust outlet connection；The outdoor heat exchanger（2）With dividing
Flow device（7）Connection, the part flow arrangement（7）Respectively with multiple outdoor heat exchangers（2）Connection, wherein, each outdoor is changed
Hot device（2）With part flow arrangement（7）Between be provided with throttling arrangement（8）；Multiple temperature-sensitive bags（9）Outdoor is respectively arranged to change
Hot device（2）, each indoor heat exchanger（3）, gas-liquid separator（5）Exhaust outlet and compressor（4）Exhaust outlet.
A kind of 2. domestic multi-connection formula frequency changer oil return control system according to claim 1, it is characterised in that:The interior
Heat exchanger（3）Group includes three indoor heat exchangers（3）.
3. a kind of a kind of control method of domestic multi-connection formula frequency changer oil return control system as described in claim 1-2, it is special
Sign is：Include following steps：S1. during air-conditioning system energization operation, oil return control system detection compressor（4）Operation frequency
Rate, compressor is judged according to testing result（4）Running frequency whether be less than 50Hz, wherein, if compressor（4）Running frequency
Less than 50Hz, then start timing；If compressor（4）Running frequency be higher than 50Hz, then timing reset；S2. compressor is worked as（4）With
50Hz running frequency continuous service 3h, then oil return control system enter oil return pattern；S3. under oil return pattern, oil return control
System detectio processed is arranged at outdoor heat exchanger（2）The temperature-sensitive bag at place（9）Temperature value to judge outdoor heat exchanger（2）Operation work
Condition, wherein, if outdoor heat exchanger（2）Under excess load operating mode, oil return control system is then handled without oil return；If outdoor is changed
Hot device（2）Under conventional operating mode, oil return control system then carries out oil return processing；S4. oil return control system detects interior successively
Heat exchanger（3）Operational mode and operation number of units to judge corresponding oil return frequency, so as to control compressor（4）With the oil return
Frequency runs 3min, meanwhile, corresponding part flow arrangement is adjusted in the process of running（7）And throttling arrangement（8）Folding and aperture；
S5. after 3min is run, oil return control system control compressor（4）Recover normal running frequency, and continually and steadily run, together
When, oil return control system timing, which is reset, completes oil return processing.
4. a kind of control method of domestic multi-connection formula frequency changer oil return control system according to claim 3, its feature exist
In：The indoor heat exchanger（3）In cooling mode, oil return control system is according to indoor heat exchanger（3）Operation unit number control
Corresponding oil return frequency, wherein, an only indoor heat exchanger（3）The oil return frequency of operation is 30Hz；Two indoor heat exchangers（3）
The oil return frequency of operation is 50Hz；Whole indoor heat exchangers（3）The oil return frequency of operation is 68Hz.
5. a kind of control method of domestic multi-connection formula frequency changer oil return control system according to claim 3, its feature exist
In：The indoor heat exchanger（3）In a heating mode, oil return control system is according to indoor heat exchanger（3）Operation unit number control
Corresponding oil return frequency, wherein, an only indoor heat exchanger（3）The oil return frequency of operation is 30Hz；Two indoor heat exchangers（3）
The oil return frequency of operation is 50Hz；Whole indoor heat exchangers（3）The oil return frequency of operation is 70Hz.
6. a kind of control method of domestic multi-connection formula frequency changer oil return control system according to claim 3, its feature exist
In：The oil return control system detects outdoor heat exchanger（2）The temperature-sensitive bag at place（9）Temperature is to judge outdoor heat exchanger（2）Fortune
Row operating mode, wherein, when detection temperature in cooling mode, detection temperature is higher than 20 DEG C higher than 40 DEG C or in a heating mode, then for
Excess load operating mode；When detection temperature in cooling mode, detection temperature is less than 20 DEG C less than 40 DEG C or in a heating mode, then for
Conventional operating mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710476431.9A CN107449173B (en) | 2017-06-21 | 2017-06-21 | A kind of control method of domestic multi-connection formula frequency changer oil return control system |
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|---|---|---|---|
| CN201710476431.9A CN107449173B (en) | 2017-06-21 | 2017-06-21 | A kind of control method of domestic multi-connection formula frequency changer oil return control system |
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| CN107449173A true CN107449173A (en) | 2017-12-08 |
| CN107449173B CN107449173B (en) | 2019-10-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870807A (en) * | 2018-03-21 | 2018-11-23 | 青岛海信日立空调系统有限公司 | The method for controlling oil return and device of multi-line system, computer storage medium |
| CN109489210A (en) * | 2018-10-15 | 2019-03-19 | 珠海格力电器股份有限公司 | Oil return control method and device for multi-split air conditioning system, oil return control equipment and air conditioner |
| CN110657550A (en) * | 2019-10-21 | 2020-01-07 | 宁波奥克斯电气股份有限公司 | Compressor oil return control method and device and air conditioner |
| WO2020082742A1 (en) * | 2018-10-22 | 2020-04-30 | 合肥美的暖通设备有限公司 | Oil return control method and device of air conditioning system, storage medium, and air conditioning system |
| CN112728812A (en) * | 2020-12-31 | 2021-04-30 | 浙江中广电器股份有限公司 | Oil return control method for multi-split air conditioning system in standby state |
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