CN106152406B - A kind of control method of air-conditioning system and its cold and hot pattern switching - Google Patents
A kind of control method of air-conditioning system and its cold and hot pattern switching Download PDFInfo
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- CN106152406B CN106152406B CN201610525403.7A CN201610525403A CN106152406B CN 106152406 B CN106152406 B CN 106152406B CN 201610525403 A CN201610525403 A CN 201610525403A CN 106152406 B CN106152406 B CN 106152406B
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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
-
- 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
-
- 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
-
- 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
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Thermal Sciences (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides the control method of a kind of air-conditioning system and its cold and hot pattern switching, it includes compressor (1), outdoor heat exchanger (2), indoor heat exchanger (3), and each pipeline for being respectively connected with of exhaust outlet, air entry, the outdoor heat exchanger (2) in the indoor heat exchanger (3) and the compressor (1) jointly by comprising position be provided with can to the cold and hot converter (4) that each pipeline controls respectively, and the cold and hot converter (4) be internally provided with cold and hot mode is carried out between the system the expansion valve component converted.Through the invention can be using expansion valve component as the control valve of cold and hot converter branch, the aperture by controlling expansion valve component changes, and the effect of mode conversion is completed, so that noise when being effectively reduced pattern switching, improves the comfort that user uses.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to the controlling party of a kind of air-conditioning system and its cold and hot pattern switching
Method.
Background technique
Current heat recovery mode converter all uses main control of the solenoid valve as mode converter in the prior art
Means, this mode control simply, but there is a problem of that larger is that control means are single, and high pressure and low pressure are led when pattern switching
The noise problem of logical moment is not easily solved, and user's comfort is poor.
Due to air-conditioning system in the prior art there are control means in the pattern switching single, generation in pattern switching
The noise technical problems such as cause user's comfort poor, therefore researching and designing of the present invention goes out a kind of air-conditioning system and its cold and hot
The control method of pattern switching.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that air-conditioning system in the prior art is overcome to switch in operational mode
When have the defects that noise causes user's comfort poor, to provide a kind of air-conditioning system and its cold and hot pattern switching
Control method.
The present invention provides a kind of air-conditioning system comprising compressor, outdoor heat exchanger, indoor heat exchanger, and in the room
The intersection area for each pipeline that exhaust outlet, air entry, the outdoor heat exchanger of interior heat exchanger and the compressor are respectively connected with
Being provided with can be provided with to the cold and hot converter that each pipeline controls respectively, and in the cold and hot converter inside to the system
Carry out the expansion valve component converted between cold and hot mode.
Preferably, it is connected between the indoor heat exchanger and the exhaust outlet of the compressor by the first pipeline；The room
It is connected between interior heat exchanger and the air entry of the compressor by the second pipeline；The indoor heat exchanger and the outdoor heat exchange
It is connected between device by third pipeline.
Preferably, first pipeline is commonly connected to the one of the indoor heat exchanger after mutually converging with second pipeline
Interface end；The third piping connection to the indoor heat exchanger another interface end.
Preferably, the expansion valve component includes being arranged in first line segments of the cold and hot converter inside
Electric expansion valve is heated, and the cooling electronic expansion being arranged in second line segments of the cold and hot converter inside
Valve.
Preferably, the heating electric expansion valve and the cooling electronic expansion valve are all made of bore range 5.0mm-
Electric expansion valve between 12.0mm.
Preferably, it is additionally provided with the pressure sensor detected for the pressure to refrigerant in the system.
Preferably, the air-conditioning system be multi-online air-conditioning system, the indoor heat exchanger be two or more, and with it is each
The indoor heat exchanger is matchingly connected with a cold and hot converter.
The present invention also provides a kind of control methods of the cold and hot pattern switching of air-conditioning system, use air-conditioning system above-mentioned
System, switches over control between the heating mode and refrigeration mode of indoor heat exchanger.
Preferably, when the expansion valve component includes cooling electronic expansion valve and heats electric expansion valve, the system also
When including pressure sensor, indoor heat exchanger from refrigeration mode switch to heating mode control method the following steps are included:
1) aperture of cooling electronic expansion valve is adjusted to 0pls first；
2) heating electric expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, according to difference
System pressure difference adjust heating electric expansion valve opening size, the system pressure difference=indoor unit pressure-outdoor
Machine pressure；
3) finally, heating electronic expansion valve opening is opened to the maximum aperture.
Preferably, the opening size of the heating electric expansion valve reduces with the increase of pressure difference value, with its reduction
And increase.
Preferably, when the expansion valve component includes cooling electronic expansion valve and heats electric expansion valve, the system also
When including pressure sensor, indoor heat exchanger from heating mode switch to refrigeration mode control method the following steps are included:
1) aperture for being heated electric expansion valve first is adjusted to 0pls；
2) cooling electronic expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, according to difference
System pressure difference adjust cooling electronic expansion valve opening size；
3) finally, cooling electronic expansion valve opening is opened to the maximum aperture.
Preferably, the opening size of the cooling electronic expansion valve reduces with the increase of pressure difference value, with its reduction
And increase.
The control method of a kind of air-conditioning system provided by the invention and its cold and hot pattern switching has the following beneficial effects:
1. the control method of air-conditioning system and its cold and hot pattern switching through the invention, using heat exchanger indoors and institute
Cold and hot conversion is arranged in the intersection area for stating each pipeline that the exhaust outlet, air entry, the outdoor heat exchanger of compressor are respectively connected with
Device and expansion valve component is set inside it, control can be passed through using expansion valve component as the control valve of cold and hot converter branch
The aperture of expansion valve component processed changes, and completes the effect of mode conversion, so that noise when being effectively reduced pattern switching, is improved
The comfort that user uses；
2. the control method of air-conditioning system and its cold and hot pattern switching through the invention, additionally it is possible to according to the big of pressure value
Small adjustings that are different and carrying out selectivity to expansion valve opening have so that the function of control means and conformability are stronger
Effect solves the single technical problem of control means.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air-conditioning system of the invention；
Fig. 2 is the control flow schematic diagram that air-conditioning system of the invention switchs to heating mode from refrigeration mode；
Fig. 3 is the control flow schematic diagram that air-conditioning system of the invention switchs to refrigeration mode from heating mode.
Appended drawing reference indicates in figure are as follows:
1-compressor, 2-outdoor heat exchangers, 3-indoor heat exchangers, the 31-the first indoor heat exchanger, in 32-second Rooms
Heat exchanger, 4-cold and hot converters, the 41-the first cold and hot converter, the 42-the second cold and hot converter, the 5-the first pipeline, 6-the
Two pipelines, 7-third pipelines, 8-heating electric expansion valves, 9-cooling electronic expansion valves, 10-pressure sensors, 11-gas
Liquid/gas separator, 12-equilibrated valves, 13-low-pressure air pipes, 14-middle hydraulic fluid pipes, 15-high-pressure air pipes, 16-electronic expansions
Valve, 17-four-way valves, 18-oil eliminators.
Specific embodiment
As shown in Figure 1, the present invention provides a kind of air-conditioning system comprising compressor 1, outdoor heat exchanger 2, indoor heat exchanger
3, and be respectively connected in the exhaust outlet, air entry, the outdoor heat exchanger 2 of the indoor heat exchanger 3 and the compressor 1 each
Pipeline jointly by comprising be provided with can be to the cold and hot converter 4 that each pipeline controls respectively, and in the cold and hot conversion for position
Device 4 is internally provided with cold and hot mode is carried out between the system the expansion valve component converted.
Air-conditioning system through the invention, using the exhaust outlet of heat exchanger indoors and the compressor, air entry, described
The intersection area for each pipeline that outdoor heat exchanger is respectively connected with is arranged cold and hot converter and expansion valve component, energy is arranged inside it
Enough using expansion valve component as the control valve of cold and hot converter branch, the aperture by controlling expansion valve component changes, and completes mould
The effect of formula conversion illustrates that airflow fluctuation is big, then adjusts aperture when noise is big and becomes smaller to reduce the flowing of air-flow, thus effectively
Noise when ground reduction mode switches improves the comfort that user uses.
Preferably, it is connected between the indoor heat exchanger 3 and the exhaust outlet of the compressor 1 by the first pipeline 5；It is described
It is connected between indoor heat exchanger 3 and the air entry of the compressor 1 by the second pipeline 6；The indoor heat exchanger 3 and the room
It is connected between external heat exchanger 2 by third pipeline 7.This is exhaust outlet, the air entry of indoor heat exchanger and compressor of the invention
And the type of attachment being attached respectively between outdoor heat exchanger.
Preferably, first pipeline 5 is commonly connected to the indoor heat exchanger 3 after converging with 6 phase of the second pipeline
An interface end；The third pipeline 7 is connected to another interface end of the indoor heat exchanger 3.This is first to third pipeline
Be respectively connected to the specific type of attachment of two interface ends of indoor heat exchanger, make in this way compressor exhaust outlet and
Air entry is finally commonly connected to an interface end of compressor, and outdoor heat exchanger is connected to another interface end of indoor heat exchanger,
When so that indoor heat exchanger heating, refrigerant flow direction are as follows: exhaust outlet of compressor-the first pipeline 5-indoor heat exchanger, 3-third pipe
Road 7-outdoor heat exchanger, 2-compressor air suction mouth；When indoor heat exchanger freezes, refrigerant flow direction are as follows: exhaust outlet of compressor-third
7-indoor heat exchanger of pipeline the 3-the second pipeline 6-outdoor heat exchanger, 2-compressor air suction mouth.
Preferably, the expansion valve component includes on 5 sections of first pipeline be arranged in inside the cold and hot converter 4
Heating electric expansion valve 8, and the cooling electronic being arranged on 6 sections of second pipeline inside the cold and hot converter 4
Expansion valve 9.This be expansion valve component specific constructive form and specific setting position, can be by heating electric expansion valve to the
Refrigerant on-off and its flow on one pipeline (heating pipeline) are controlled, can be by cooling electronic expansion valve to the second pipeline
Refrigerant on-off and its flow on (refrigeration pipeline) are controlled, and realize the switching of the low noise between cold and hot mode.
Preferably, the heating electric expansion valve 8 and cooling electronic expansion valve 9 are heavy caliber (i.e. bore range
5.0mm-12.0mm) electric expansion valve.This is the specific preferred of heating electric expansion valve and cooling electronic expansion valve of the invention
Structure type.Control valve of the present invention further preferably using bigbore electric expansion valve as mode converter branch,
By controlling the aperture variation of electric expansion valve, the effect completing mode conversion and operating normally.Since electric expansion valve has
Multiple pulse step numbers are adjusted, and can effectively be controlled for different pulse step numbers through electric expansion valve cold medium flux.Work as room
When interior machine needs to carry out pattern switching, high pressure conditions refrigerant in pressure duct can be by electronic expansion valve controls, with one
The state of small flow has the function that carry out pressure release to high pressure refrigerant by a part of refrigerant, to pressure reach one it is balanced
After state, electric expansion valve is fully opened at this time, guarantees that the proper flow of refrigerant, system operate normally, unit completes mode
The movement of switching.By above interior machine pattern switching can further reduction mode switching noise, promote user's
Comfort.
Preferably, it is additionally provided with the pressure sensor 10 detected for the pressure to refrigerant in the system.In this way
The real-time pressure of refrigerant in system can be detected by pressure sensor, it can be according to the of different sizes of pressure value and to expansion
Valve opening carries out the adjusting of selectivity, so that the function of control means and conformability are stronger, effectively solves control means
Single technical problem.
It is further preferred that the pressure sensor is arranged on high-pressure air pipe 15 and low-pressure air pipe 13, alternatively, setting exists
On first pipeline 5 and the second pipeline 6.
Preferably, the air-conditioning system be multi-online air-conditioning system, the indoor heat exchanger 3 be two or more, and with it is every
A indoor heat exchanger 3 is matchingly connected with a cold and hot converter.This is the preferred of air-conditioning system of the invention
Structure type can be effectively to more than two indoor heat exchangers by setting multi-line system for air-conditioning system selection
Refrigeration and heating mode between operation switching carry out low noise control, and control means diversification.
It is further preferred that the indoor heat exchanger 3 is two, respectively changed in the first indoor heat exchanger 31 and second Room
Hot device 32, and with first indoor heat exchanger 31 be conjointly provided with the first cold and hot converter 41, with changed in the second Room
Hot device 32 is conjointly provided with the second cold and hot converter 42.
It is highly preferred that first pipeline 5 is branched off into two pipelines and is respectively connected to the described first cold and hot converter 41
With the described second cold and hot converter 42；Second pipeline 6 is branched off into two pipelines and is respectively connected to described first cold and hot turn
Parallel operation 41 and the second cold and hot converter 42；The third pipeline 7 is branched off into two pipelines and is respectively connected to described first
Cold and hot converter 41 and the second cold and hot converter 42.
The present invention also provides a kind of control methods of the cold and hot pattern switching of air-conditioning system, use air-conditioning system above-mentioned
System, switches over control between the heating mode and refrigeration mode of indoor heat exchanger.Air-conditioning system through the invention it is cold
The control method of heat pattern switching, using exhaust outlet, air entry, the outdoor heat exchange of heat exchanger indoors and the compressor
The intersection area for each pipeline that device is respectively connected with is arranged cold and hot converter and expansion valve component is arranged inside it, can will expand
Control valve of the valve module as cold and hot converter branch, the aperture by controlling expansion valve component change, and complete mode conversion
Effect illustrates that airflow fluctuation is big, then adjusts aperture when noise is big and becomes smaller to reduce the flowing of air-flow, to be effectively reduced mould
Noise when formula switches improves the comfort that user uses.
Preferably, when the expansion valve component includes cooling electronic expansion valve and heats electric expansion valve, the system also
When including pressure sensor, indoor heat exchanger from refrigeration mode switch to heating mode control method the following steps are included:
1) aperture of cooling electronic expansion valve is adjusted to 0pls first；The refrigerant of refrigeration flow direction is closed into isolation, is avoided
The case where pressure is ganged up；
2) heating electric expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, according to difference
System pressure difference adjust heating electric expansion valve opening size, the system pressure difference=indoor unit pressure-outdoor
Machine pressure；
3) finally, heating electronic expansion valve opening is opened to the maximum aperture.Final mode converter heats electric expansion valve
Aperture opens to the maximum the demand that aperture reaches system refrigerant proper flow.
This is the specific rate-determining steps for the control method that indoor heat exchanger is converted to heating mode from refrigeration mode, such energy
Enough adjustings that adaptability is carried out according to opening size of the system pressure difference to heating electric expansion valve, so that control means are more smart
Standard, control effect is more accurate, so that switching control process noise is reduced to minimum.
Preferably, the opening size of the heating electric expansion valve reduces with the increase of pressure difference value, with its reduction
And increase.That is the bigger opening size for adjusting electric expansion valve of pressure difference is smaller；Pressure difference gets over opening for minor adjustment electric expansion valve
It is bigger to spend size.Air-flow differential is bigger, illustrates that air-flow is more unstable, and bypass amount is bigger, then its flow it is bigger will bring it is big
Vibration and noise, so needing to reduce expansion valve opening, to reduce flow, to reduce noise.Air-flow differential is smaller, illustrates gas
Stream is more stable, and bypass amount is smaller, then its flow the big, will not bring big vibration and noise, it is possible to increase expansion valve and open
Degree, to increase flow, to improve air flow rate while reducing noise.
Pressure condition of the heat-reclamation multi-compressors system according to pressure sensor detection system, control model converter heating electricity
Sub- expansion valve opening, in the case that system pressure difference is different, mode converter heats electronic expansion valve opening difference, with pressure
The bigger electronic expansion valve opening aperture of difference is smaller, avoids bypass amount is excessive from causing noise larger.
Preferably, when the expansion valve component includes cooling electronic expansion valve and heats electric expansion valve, the system also
When including pressure sensor, indoor heat exchanger from heating mode switch to refrigeration mode control method the following steps are included:
1) aperture for being heated electric expansion valve first is adjusted to 0pls (closing heating electric expansion valve)；It will heating
The case where refrigerant of flow direction closes isolation, and pressure is avoided to gang up；
2) cooling electronic expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, according to difference
System pressure difference adjust cooling electronic expansion valve opening size；
3) finally, cooling electronic expansion valve opening is opened to the maximum aperture.Final mode converter cooling electronic expansion valve
Aperture opens to the maximum the demand that aperture reaches system refrigerant proper flow.
This is the specific rate-determining steps for the control method that indoor heat exchanger is converted to heating mode from refrigeration mode, such energy
Enough adjustings that adaptability is carried out according to opening size of the system pressure difference to heating electric expansion valve, so that control means are more smart
Standard, control effect is more accurate, so that switching control process noise is reduced to minimum.
Preferably, the opening size of the cooling electronic expansion valve reduces with the increase of pressure difference value, with its reduction
And increase.That is the bigger opening size for adjusting electric expansion valve of pressure difference is smaller；Pressure difference gets over opening for minor adjustment electric expansion valve
It is bigger to spend size.Air-flow differential is bigger, illustrates that air-flow is more unstable, then its flow is bigger will bring big vibration and noise,
So needing to reduce expansion valve opening, to reduce flow, to reduce noise.Air-flow differential is smaller, illustrates that air-flow is more stable, then
Its flow the big, will not bring big vibration and noise, it is possible to increase expansion valve opening, to increase flow, thus subtracting
Air flow rate is improved while small noise.
The working principle of the invention and preferred embodiment is described below
The present invention invention is a kind of peculiar solution noise scheme for multi-online air-conditioning system, as complete set
Commutate noise solution, and the program is divided into several parts, detection part, the content of control section and execution part.When hot empty
Adjusting system if the first indoor heat exchanger 31 needs switch to heating mode from refrigeration, first corresponds to first when operating normally
The mode converter cooling electronic expansion valve 9 of second pipeline 6 of cold and hot converter 41 (or mode converter), can adjust at once
To 0pls, the case where closing isolation by the refrigerant of refrigeration flow direction, pressure avoided to gang up.Then heat-reclamation multi-compressors system root
According to the pressure condition of pressure sensor detection system, the cold and hot converter 41 of control first heats 8 aperture of electric expansion valve, system pressure
In the case that power difference is different, mode converter heats 8 aperture of electric expansion valve difference, with the bigger heating electronic expansion of pressure difference
8 aperture of valve is smaller, avoids bypass amount is excessive from causing noise larger.Last first cold and hot converter 41 heats electric expansion valve 8 and opens
Degree opens to the maximum the demand that aperture reaches system refrigerant proper flow.
When air-conditioning system is when operating normally, if the first indoor heat exchanger 31 needs switch to refrigeration mode from heating,
The mode converter heating electric expansion valve 8 on the first pipeline 5 of the first cold and hot converter 41 is first corresponded to, can be adjusted at once
0pls, the case where closing isolation by the refrigerant of heating flow direction, pressure is avoided to gang up.Then multi-line system is passed according to pressure
The pressure condition of 10 detection system of sensor, 9 aperture of control model converter cooling electronic expansion valve, the different feelings of system pressure difference
Under condition, 9 aperture of mode converter cooling electronic expansion valve is different, as the bigger electronic expansion valve opening aperture of pressure difference is smaller,
Avoid bypass amount is excessive from causing noise larger.Last first cold and hot 41 cooling electronic expansion valve of converter, 9 aperture opens to the maximum out
Degree reaches the demand of system refrigerant proper flow.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.With
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection scope of invention.
Claims (10)
1. a kind of air-conditioning system, it is characterised in that: including compressor (1), outdoor heat exchanger (2), indoor heat exchanger (3), and
The exhaust outlet, air entry, the outdoor heat exchanger (2) of the indoor heat exchanger (3) and the compressor (1) are respectively connected with each
Pipeline jointly by comprising be provided with can be to the cold and hot converter (4) that each pipeline controls respectively, and at described cold and hot turn for position
Parallel operation (4) is internally provided with cold and hot mode is carried out between the system the expansion valve component converted；
It is connected between the indoor heat exchanger (3) and the exhaust outlet of the compressor (1) by the first pipeline (5)；The interior
It is connected between heat exchanger (3) and the air entry of the compressor (1) by the second pipeline (6)；The expansion valve component includes setting
The heating electric expansion valve (8) in internal the first pipeline (5) section of the cold and hot converter (4) is set, and setting exists
Cooling electronic expansion valve (9) in internal the second pipeline (6) section of the cold and hot converter (4)；Be additionally provided with for pair
The pressure sensor (10) that the pressure of refrigerant is detected in the system；
Indoor heat exchanger from refrigeration mode switch to heating mode control method the following steps are included:
1) aperture of cooling electronic expansion valve is adjusted to 0pls first；
2) heating electric expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, is according to different
Pressure difference value of uniting adjusts the opening size of heating electric expansion valve, the system pressure difference=indoor unit pressure-outdoor unit pressure
Power；
3) finally, heating electronic expansion valve opening is opened to the maximum aperture.
2. air-conditioning system according to claim 1, it is characterised in that: the indoor heat exchanger (3) and the outdoor heat exchange
It is connected between device (2) by third pipeline (7).
3. air-conditioning system according to claim 2, it is characterised in that: first pipeline (5) and second pipeline (6)
An interface end of the indoor heat exchanger (3) is commonly connected to after mutually converging；The third pipeline (7) is connected to the interior and changes
Another interface end of hot device (3).
4. air-conditioning system according to claim 1, it is characterised in that: the heating electric expansion valve (8) and the refrigeration
Electric expansion valve (9) is all made of the electric expansion valve between bore range 5.0mm-12.0mm.
5. air-conditioning system described in one of -4 according to claim 1, it is characterised in that: the air-conditioning system is multi-gang air-conditioner system
System, the indoor heat exchanger (3) is two or more, and is matchingly connected with one with each indoor heat exchanger (3)
A cold and hot converter.
6. a kind of control method of the cold and hot pattern switching of air-conditioning system, it is characterised in that: using described in one of claim 1-5
Air-conditioning system, switch over control between the heating mode and refrigeration mode of indoor heat exchanger.
7. control method according to claim 6, it is characterised in that: indoor heat exchanger switchs to heating mode from refrigeration mode
Control method the following steps are included:
1) aperture of cooling electronic expansion valve is adjusted to 0pls first；
2) heating electric expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, is according to different
Pressure difference value of uniting adjusts the opening size of heating electric expansion valve, the system pressure difference=indoor unit pressure-outdoor unit pressure
Power；
3) finally, heating electronic expansion valve opening is opened to the maximum aperture.
8. control method according to claim 7, it is characterised in that: it is described heating electric expansion valve opening size with
The increase of pressure difference value and reduce, with its reduce and increase.
9. control method according to claim 6, it is characterised in that: when the expansion valve component includes cooling electronic expansion
Valve and heating electric expansion valve, the system also includes when pressure sensor, indoor heat exchanger switchs to the mould that freezes from heating mode
The control method of formula the following steps are included:
1) aperture for being heated electric expansion valve first is adjusted to 0pls；
2) cooling electronic expansion valve is then opened, and passes through the pressure condition of pressure sensor detection system, is according to different
Pressure difference value of uniting adjusts the opening size of cooling electronic expansion valve；
3) finally, cooling electronic expansion valve opening is opened to the maximum aperture.
10. control method according to claim 9, it is characterised in that: the opening size of the cooling electronic expansion valve with
The increase of pressure difference value and reduce, with its reduce and increase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525403.7A CN106152406B (en) | 2016-07-04 | 2016-07-04 | A kind of control method of air-conditioning system and its cold and hot pattern switching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525403.7A CN106152406B (en) | 2016-07-04 | 2016-07-04 | A kind of control method of air-conditioning system and its cold and hot pattern switching |
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| CN106152406A CN106152406A (en) | 2016-11-23 |
| CN106152406B true CN106152406B (en) | 2019-06-25 |
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| CN109631424A (en) * | 2018-12-06 | 2019-04-16 | 珠海格力电器股份有限公司 | Coolant distributor, three-pipe heating and reclaiming air-conditioning system and its control method |
| CN109798628B (en) * | 2019-01-25 | 2021-01-05 | 广东美的暖通设备有限公司 | Method and device for controlling pressure difference of refrigerant flow dividing device |
| CN112178893B (en) * | 2020-09-22 | 2021-11-30 | 广东美的暖通设备有限公司 | Air conditioner, control method, and computer-readable storage medium |
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| KR100504509B1 (en) * | 2003-01-16 | 2005-08-03 | 엘지전자 주식회사 | Multi-type air conditioner for cooling/heating the same time |
| JP2008101787A (en) * | 2006-10-17 | 2008-05-01 | Daikin Ind Ltd | Air conditioner |
| KR100840940B1 (en) * | 2007-02-12 | 2008-06-24 | 삼성전자주식회사 | Air conditioning system and control method thereof |
| JP2011247490A (en) * | 2010-05-27 | 2011-12-08 | Sanyo Electric Co Ltd | Multi-chamber type air conditioner |
| CN105091392B (en) * | 2014-04-15 | 2018-06-05 | 珠海格力电器股份有限公司 | Heat-reclamation multi-compressors system and its control method |
| CN105066349B (en) * | 2015-08-03 | 2017-10-27 | 珠海格力电器股份有限公司 | The interior machine patten transformation control method and heat-reclamation multi-compressors of heat-reclamation multi-compressors |
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