CN108168138A - Outdoor unit, air conditioning system and control method - Google Patents
Outdoor unit, air conditioning system and control method Download PDFInfo
- Publication number
- CN108168138A CN108168138A CN201810002440.9A CN201810002440A CN108168138A CN 108168138 A CN108168138 A CN 108168138A CN 201810002440 A CN201810002440 A CN 201810002440A CN 108168138 A CN108168138 A CN 108168138A
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- Prior art keywords
- heat exchanger
- compressor
- valve
- outdoor unit
- solenoid valve
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000005057 refrigeration Methods 0.000 claims abstract description 35
- 239000003507 refrigerant Substances 0.000 claims abstract description 33
- 238000004891 communication Methods 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010257 thawing Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- 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
-
- 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
- F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
- F25B2313/0211—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit the auxiliary heat exchanger being only used during defrosting
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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
- 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
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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 provides an outdoor unit, an air conditioning system and a control method. According to the outdoor unit, the air conditioning system and the control method provided by the invention, by arranging the two heat exchangers, a part of high-temperature refrigerant can enter the indoor unit in the defrosting process of the outdoor unit of the air conditioner, so that the indoor unit is not stopped to continuously heat when the outdoor unit defrosts, the heating capacity of the unit is powerfully ensured, the air outlet temperature and the comfort of the indoor side are kept, and the first heat exchanger is only adopted to work under the condition of high-temperature heating or low-temperature refrigeration, so that the high and low pressures of the system are properly adjusted, and the reliability and the comfort of the unit are better ensured.
Description
Technical field
The present invention relates to air conditioner technical field, particularly a kind of outdoor unit, air-conditioning system and control method.
Background technology
Currently with rapid economic development, multi-connected machine is widely popularized and is used, in hospital, supermarket, stadium etc.
Large-scale place is seen everywhere, and in coastal area, winter climate is moist, and air humidity is larger, and air-conditioner outdoor unit is in tide in this way
In wet environment, in heating operation China and foreign countries, machine frosting frequency is very high, and defrost during in order not to allow inside blowing cold air, interior machine
It will be shutdown status, heating effect in room is caused to substantially reduce.
Invention content
In order to solve the above-mentioned technical problem, a kind of outdoor unit for not shutting down defrost, air-conditioning system and control method are provided.
A kind of outdoor unit, including the first connecting tube and the second connecting tube connected with indoor unit, further include compressor, two
Heat exchanger, two reversal valves and two throttling sets, a heat exchanger are connected with a reversal valve, and each described
Reversal valve is respectively provided with the first position that the heat exchanger is made to be connected with the exhaust outlet of the compressor and is the heat exchanger and institute
The second position of the air entry connection of compressor is stated, each one end of the heat exchanger far from the reversal valve passes through one respectively
The throttling set is connected with first connecting tube, there are two the described one end of second connecting tube far from indoor unit is arranged in parallel
Solenoid valve, and a solenoid valve is connected with the air entry of the compressor, another solenoid valve and the compressor
Exhaust outlet connects.
The reversal valve is four-way valve, and the first communication port of the four-way valve is connected with the exhaust outlet of the compressor, the
Two communication ports are connected with the corresponding heat exchanger, and third connecting mouth is connected with the air entry of the compressor, the 4th communication port
Closing setting, and when the four-way valve is in the first position, first communication port is connected with second communication port, institute
When stating four-way valve and being in the second position, second communication port is connected with the third connecting mouth.
The reversal valve is triple valve, and the first communication port of the triple valve is connected with the exhaust outlet of the compressor, the
Two communication ports are connected with the corresponding heat exchanger, and third connecting mouth is connected with the air entry of the compressor, and the threeway
When valve is in the first position, first communication port is connected with second communication port, and the triple valve is in described the
During two positions, second communication port is connected with the third connecting mouth.
Two solenoid valves be respectively heating solenoid valve and refrigeration solenoid valve, one end of the heating solenoid valve with it is described
Second connecting tube connects, and the other end is connected with the exhaust outlet of the compressor, one end and described second of the refrigeration solenoid valve
Connecting tube connects, and the other end is connected with the air entry of the compressor.
The outdoor unit further includes oil eliminator, and the air inlet mouth of the oil eliminator connects with the exhaust outlet of the compressor
Logical, oil export is connected with the oil return opening of the compressor, and gas outlet is connected with second communicating pipe and/or the reversal valve.
The outdoor unit further includes gas-liquid separator, and the air inlet of the gas-liquid separator is connected with second connecting tube
And/or the reversal valve connection, gas outlet is connected with the air entry of the compressor.
The first solenoid valve is provided in first connecting tube, second solenoid valve is provided in second connecting tube.
Two heat exchangers include First Heat Exchanger and the second heat exchanger, and the First Heat Exchanger is set to described the
The top of two heat exchangers.
Two reversal valves include the first reversal valve and the second reversal valve, and two throttling sets include first throttle
Device and second throttling device, and first reversal valve and the first throttling device are connected with the First Heat Exchanger and are set
It puts, second reversal valve and the second throttling device are arranged in series with second heat exchanger.
A kind of air-conditioning system, including indoor unit and outdoor unit, the outdoor unit is above-mentioned outdoor unit, and the outdoor unit
It connects to form refrigerant circulation channel with the indoor unit by first connecting tube and second connecting tube.
Include third throttling set in the indoor unit, the third throttling set is connected with first connecting tube.
A kind of control method of above-mentioned outdoor unit or above-mentioned air-conditioning system, including：
Refrigeration mode, two reversal valves are in first position, and the heating solenoid valve is closed, the refrigeration electromagnetism
Valve is opened, and the refrigerant of the compressor discharge after First Heat Exchanger and the second heat exchanger and is flow in the indoor unit respectively
Freeze；
Heating mode, two reversal valves are in the second position, and the refrigeration solenoid valve is closed, the heating electromagnetism
Valve is opened, and the refrigerant of the compressor discharge passes through First Heat Exchanger and the second heat exchanger respectively after indoor unit heating
It is back in compressor；
First Heat Exchanger defrost pattern, first reversal valve are in the second position, and second reversal valve is in first
Position, the heating solenoid valve are opened, and the refrigeration solenoid valve is closed, and the refrigerant of the compressor discharge passes through indoor unit respectively
Cocurrent after being heated with First Heat Exchanger, and be back in compressor by second heat exchanger；
Second heat exchanger defrosting pattern, second reversal valve are in the second position, and first reversal valve is in first
Position, the heating solenoid valve are opened, and the refrigeration solenoid valve is closed, and the refrigerant of the compressor discharge passes through indoor unit respectively
Cocurrent after being heated with the second heat exchanger, and be back in compressor by the First Heat Exchanger.
It further includes：
Cryogenic refrigeration pattern, when outdoor environment is less than the first set temperature, and system low-voltage is less than the first setting value, the
Two reversal valves are in the second position, and the first reversal valve is in first position, and refrigeration solenoid valve is opened, second throttling device and heating
Solenoid valve is closed, and the refrigerant of the compressor discharge is back to after the first reversal valve, First Heat Exchanger and indoor unit successively
In compressor；
High temperature heating mode, when outdoor environment higher than the set temperature, and when system low-voltage is higher than the second setting value, institute
It states the second reversal valve and is in the second position, first reversal valve is in first position, and heating solenoid valve is opened, second section
It flows device and refrigeration solenoid valve is closed, the refrigerant of the compressor discharge changes successively by indoor unit, First Heat Exchanger and first
It is back in compressor after valve.
First set temperature is 0 DEG C, and first setting value is -2 DEG C, and second set temperature is 30 DEG C, institute
It is 55 DEG C to state the second setting value.
If the First Heat Exchanger and second heat exchanger detect defrost signal, into the second heat exchanger
White pattern, and after the completion of second heat exchanger defrosting, into First Heat Exchanger defrost pattern.
Outdoor unit provided by the invention, air-conditioning system and control method, by setting two heat exchangers, in air-conditioner outdoor unit
Into during defrosting, a part of high temperature refrigerant can enter interior machine, and interior machine does not shut down lasting heating when realizing outer machine defrost, so as to
Strong guarantee unit heating capacity keeps the leaving air temp and comfort of indoor, and in the feelings of high temperature heating or cryogenic refrigeration
It works under condition only with First Heat Exchanger, appropriate regulating system high-low pressure preferably ensures unit reliability and comfort.
Description of the drawings
Fig. 1 is the structure diagram of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method；
Fig. 2 is the refrigerant stream of the air-conditioning system refrigeration mode of outdoor unit provided by the invention, air-conditioning system and control method
Xiang Tu；
Fig. 3 is the refrigerant of the heating mode of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method
Flow graph；
Fig. 4 is the First Heat Exchanger defrost of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method
The refrigerant flow graph of pattern；
Fig. 5 is the second heat exchanger defrosting of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method
The refrigerant flow graph of pattern；
Fig. 6 is the cryogenic refrigeration pattern of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method
Refrigerant flow graph；
Fig. 7 is the high temperature heating mode of the air-conditioning system of outdoor unit provided by the invention, air-conditioning system and control method
Refrigerant flow graph；
In figure：
1st, the first connecting tube；2nd, the second connecting tube；3rd, compressor；4th, heat exchanger；5th, reversal valve；6th, throttling set；101、
Indoor unit；7th, solenoid valve；71st, heating solenoid valve；72nd, freeze solenoid valve；8th, oil eliminator；9th, gas-liquid separator；73rd, the first electricity
Magnet valve；74th, second solenoid valve；41st, First Heat Exchanger；42nd, the second heat exchanger；51st, the first reversal valve；52nd, the second reversal valve；
61st, first throttling device；62nd, second throttling device.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to the accompanying drawings and embodiments
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used for explaining the present invention, not
For limiting the present invention.
Outdoor unit as shown in Figures 1 to 7, including the first connecting tube 1 and the second connecting tube 2 connected with indoor unit 101,
Further include 3, two, compressor, 4, two, heat exchanger reversal valve 5 and two throttling sets 6, a heat exchanger 4 and an institute
It states reversal valve 5 to connect, and each reversal valve 5 is respectively provided with makes what the heat exchanger 4 was connected with the exhaust outlet of the compressor 3
First position and be the second position that the heat exchanger 4 is connected with the air entry of the compressor 3, each heat exchanger 4 are remote
One end from the reversal valve 5 is connected respectively by a throttling set 6 with first connecting tube 1, and described second connects
The one end of take over 2 far from indoor unit 101 is arranged in parallel there are two solenoid valve 7, and a solenoid valve 7 and the compressor 3
Air entry connection, another solenoid valve 7 connects with the exhaust outlet of the compressor 3, and two heat exchangers 4 are set side by side
It puts, and each heat exchanger 4 is set to 3 and first connecting tube 1 of compressor by a reversal valve 5 and a throttling set 6
Between, the adjusting heat exchanger 4 of reversal valve 5 and compressor 3 can be passed through under or heating mode state in refrigeration mode in outdoor unit
Air entry or exhaust outlet connection, ensure refrigerant complete cycle, by throttling set 6 to the refrigerant of its corresponding heat exchanger 4 into
Row throttling expansion acts on, being capable of or heating mode state in refrigeration mode in outdoor unit downward by setting two solenoid valves 7
Save the state that the second connecting tube 2 is connected with the air entry or exhaust outlet of compressor 3.
The reversal valve 5 is four-way valve, and the first communication port of the four-way valve is connected with the exhaust outlet of the compressor 3,
Second communication port is connected with the corresponding heat exchanger 4, and third connecting mouth is connected with the air entry of the compressor 3, and the 4th connects
Port closing setting, and when the four-way valve be in the first position, first communication port and second communication port company
Logical, when the four-way valve is in the second position, second communication port is connected with the third connecting mouth, by four-way valve
4th communication port sealed set so that when four-way valve is in first position, the third connecting mouth and the 4th communication port
It can not be connected during connection with other structures, achieve the effect that close third connecting mouth, similarly, the four-way valve is in second
During position, the first communication port is connected with the 4th communication port, achievees the effect that close the first communication port.
The reversal valve 5 is triple valve, and the first communication port of the triple valve is connected with the exhaust outlet of the compressor 3,
Second communication port is connected with the corresponding heat exchanger 4, and third connecting mouth connects, and described with the air entry of the compressor 3
When triple valve is in the first position, first communication port is connected with second communication port, and the triple valve is in institute
When stating the second position, second communication port is connected with the third connecting mouth, and the position being in using triple valve can be adjusted
The state that heat exchanger 4 is connected with the air entry or exhaust outlet of compressor 3.
Two solenoid valves 7 are respectively heating solenoid valve 71 and the solenoid valve 72 that freezes, and the one of the heating solenoid valve 71
End is connected with second connecting tube 2, and the other end is connected with the exhaust outlet of the compressor 3, and the one of the refrigeration solenoid valve 72
End is connected with second connecting tube 2, and the other end is connected with the air entry of the compressor 3, passes through solenoid valve 72 and the system of freezing
Thermoelectrical magnetic valve 71 is to the second connecting tube 2 and the adjusting of the air entry or exhaust outlet connected state of the compressor 3.
The outdoor unit further includes oil eliminator 8, the exhaust of the air inlet mouth of the oil eliminator 8 and the compressor 3
Mouth connection, oil export are connected with the oil return opening of the compressor 3, gas outlet and second communicating pipe and/or the reversal valve 5
Connection.
The outdoor unit further includes gas-liquid separator 9, the air inlet of the gas-liquid separator 9 and second connecting tube 2
Connection and/or the reversal valve 5 connect, and gas outlet is connected with the air entry of the compressor 3.
The first solenoid valve 73 is provided in first connecting tube 1, second solenoid valve is provided in second connecting tube 2
74, by setting the first solenoid valve 73 and second solenoid valve 74 can be when connecting indoor unit 101 or repair, by outdoor unit and room
The connection of interior machine 101 is fully disconnected, and can be when movement is marked with the outdoor unit of refrigerant, by the first solenoid valve 73 and the second electricity
Magnet valve 74 is closed, and prevents outdoor unit at secondary refrigerant leakage.
Two heat exchangers 4 include 41 and second heat exchanger 42 of First Heat Exchanger, and the First Heat Exchanger 41 is set
In the top of second heat exchanger 42, it is preferred that the outdoor unit includes shell, the First Heat Exchanger 41 and described second
Heat exchanger 42 and compressor 3 may be contained within the enclosure, and second heat exchanger 42 is set to described first
41 lower section of heat exchanger, it is generally the case that 4 frost of lower heat exchangers is thicker, and heat exchange influences big.
Two reversal valves 5 include the first reversal valve 51 and the second reversal valve 52, and two throttling sets 6 include the
One throttling set 61 and second throttling device 62, and first reversal valve 51 and the first throttling device 61 and described first
Heat exchanger 41 is arranged in series, and second reversal valve 52 and the second throttling device 62 are connected with second heat exchanger 42 and set
It puts.
A kind of air-conditioning system, including indoor unit 101 and outdoor unit, the outdoor unit is above-mentioned outdoor unit, and the room
Outer machine connects to form refrigerant circulation channel by first connecting tube 1 and second connecting tube 2 with the indoor unit 101.
Including third throttling set in the indoor unit 101, the third throttling set is connected with first connecting tube,
The third throttling set is constantly in automatic adjustment working condition.
A kind of control method of above-mentioned outdoor unit or above-mentioned air-conditioning system, including：
Refrigeration mode, two reversal valves 5 are in first position, and the heating solenoid valve 71 is closed, the refrigeration
Solenoid valve 72 is opened, and the refrigerant that the compressor 3 is discharged after 41 and second heat exchanger 42 of First Heat Exchanger and is flow to respectively
Freeze in the indoor unit 101；
Heating mode, two reversal valves 5 are in the second position, and the refrigeration solenoid valve 72 is closed, the heating
Solenoid valve 71 is opened, and the refrigerant that the compressor 3 is discharged passes through First Heat Exchanger 41 respectively after the indoor unit 101 heating
It is back in compressor 3 with the second heat exchanger 42；
41 defrost pattern of First Heat Exchanger, first reversal valve 51 are in the second position, at second reversal valve 52
In first position, the heating solenoid valve 71 is opened, and the refrigeration solenoid valve 72 is closed, the refrigerant that the compressor 3 is discharged point
The cocurrent not after indoor unit 101 and First Heat Exchanger 41 heat, and it is back to compressor 3 by second heat exchanger 42
In；
Second heat exchanger, 42 defrost pattern, second reversal valve 52 are in the second position, at first reversal valve 51
In first position, the heating solenoid valve 71 is opened, and the refrigeration solenoid valve 72 is closed, the refrigerant that the compressor 3 is discharged point
The cocurrent not after the heating of 101 and second heat exchanger 42 of indoor unit, and it is back to compressor 3 by the First Heat Exchanger 41
In.
It further includes：
Cryogenic refrigeration pattern, when outdoor environment is less than the first set temperature, and system low-voltage is less than the first setting value, the
Two reversal valves 52 are in the second position, and the first reversal valve 51 is in first position, and refrigeration solenoid valve 72 is opened, second throttling device
62 and heating solenoid valve 71 close, the refrigerant that the compressor 3 is discharged is successively by the first reversal valve 51,41 and of First Heat Exchanger
It is back to after indoor unit 101 in compressor 3, the machine inlet pipe temperature out of outside absorption cold, promotion can be reduced in this way, system is low
Pressure raising makes unit reduce anti-freeze protection；
High temperature heating mode, when outdoor environment higher than the set temperature, and when system low-voltage is higher than the second setting value, institute
It states the second reversal valve 52 and is in the second position, first reversal valve 51 is in first position, and heating solenoid valve 71 is opened, described
Second throttling device 62 and refrigeration solenoid valve 72 are closed, and the refrigerant that the compressor 3 is discharged passes through indoor unit 101, first successively
It is back in compressor 3 after 41 and first reversal valve 51 of heat exchanger, can be reduced in this way from outside and absorb heat, be effectively reduced
System high pressure makes unit reduce high voltage protective.
First set temperature is 0 DEG C, and first setting value is -2 DEG C, and second set temperature is 30 DEG C, institute
It is 55 DEG C to state the second setting value.
If the First Heat Exchanger 41 and second heat exchanger 42 detect defrost signal, because of the second heat exchanger 42
In the lower section of First Heat Exchanger 41, and under normal conditions, 4 frost of lower heat exchangers is thick, and heat exchange influences big, therefore, preferentially enters the
Two heat exchangers, 42 defrost pattern, and after the completion of 42 defrost of the second heat exchanger, into 41 defrost pattern of First Heat Exchanger.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (15)
1. a kind of outdoor unit, including the first connecting tube (1) connected with indoor unit (101) and the second connecting tube (2), feature exists
In：Further include compressor (3), two heat exchangers (4), two reversal valves (5) and two throttling sets (6), a heat exchange
Device (4) is connected with a reversal valve (5), and each reversal valve (5) is respectively provided with makes the heat exchanger (4) and the pressure
The first position of the exhaust outlet connection of contracting machine (3) and make that the heat exchanger (4) connects with the air entry of the compressor (3) the
Two positions, each heat exchanger (4) far from the reversal valve (5) one end respectively by a throttling set (6) with
First connecting tube (1) connection, the one end of second connecting tube (2) far from indoor unit (101) are arranged in parallel that there are two electricity
Magnet valve (7), and a solenoid valve (7) connects with the air entry of the compressor (3), another solenoid valve (7) and institute
State the exhaust outlet connection of compressor (3).
2. outdoor unit according to claim 1, it is characterised in that：The reversal valve (5) is four-way valve, the four-way valve
First communication port is connected with the exhaust outlet of the compressor (3), and the second communication port is connected with the corresponding heat exchanger (4), the
Tee joint mouth is connected with the air entry of the compressor (3), the closing setting of the 4th communication port, and the four-way valve is in described the
During one position, first communication port is connected with second communication port, described when the four-way valve is in the second position
Second communication port is connected with the third connecting mouth.
3. outdoor unit according to claim 1, it is characterised in that：The reversal valve (5) is triple valve, the triple valve
First communication port is connected with the exhaust outlet of the compressor (3), and the second communication port is connected with the corresponding heat exchanger (4), the
Tee joint mouth is connected with the air entry of the compressor (3), and when the triple valve is in the first position, and described first connects
Port is connected with second communication port, when the triple valve is in the second position, second communication port and described the
Tee joint mouth connects.
4. outdoor unit according to claim 1, it is characterised in that：Two solenoid valves (7) are respectively heating solenoid valve
(71) with refrigeration solenoid valve (72), one end of the heating solenoid valve (71) connects with second connecting tube (2), the other end and
The exhaust outlet connection of the compressor (3), one end of the refrigeration solenoid valve (72) are connected with second connecting tube (2), separately
One end is connected with the air entry of the compressor (3).
5. outdoor unit according to claim 1, it is characterised in that：The outdoor unit further includes oil eliminator (8), the oil
The air inlet mouth of separator (8) is connected with the exhaust outlet of the compressor (3), the oil return opening of oil export and the compressor (3)
Connection, gas outlet is connected with second communicating pipe and/or the reversal valve (5).
6. outdoor unit according to claim 1, it is characterised in that：The outdoor unit further includes gas-liquid separator (9), described
The air inlet of gas-liquid separator (9) is connected with second connecting tube (2) and/or the reversal valve (5) connection, gas outlet and institute
State the air entry connection of compressor (3).
7. outdoor unit according to claim 1, it is characterised in that：The first electromagnetism is provided on first connecting tube (1)
Valve (73) is provided with second solenoid valve (74) on second connecting tube (2).
8. outdoor unit according to claim 1, it is characterised in that：Two heat exchangers (4) are including First Heat Exchanger
(41) and the second heat exchanger (42), and the First Heat Exchanger (41) is set to the top of second heat exchanger (42).
9. outdoor unit according to claim 8, it is characterised in that：Two reversal valves (5) include the first reversal valve
(51) and the second reversal valve (52), two throttling sets (6) include first throttling device (61) and second throttling device
(62), and first reversal valve (51) and the first throttling device (61) are arranged in series with the First Heat Exchanger (41),
Second reversal valve (52) and the second throttling device (62) are arranged in series with second heat exchanger (42).
10. a kind of air-conditioning system, including indoor unit (101) and outdoor unit, it is characterised in that：The outdoor unit is claim 1-
Outdoor unit described in any one of 9, and the outdoor unit by first connecting tube (1) and second connecting tube (2) with
Indoor unit (101) connection forms refrigerant circulation channel.
11. air-conditioning system according to claim 10, it is characterised in that：Include third in the indoor unit (101) to throttle
Device, the third throttling set are connected with first connecting tube.
12. the control of the outdoor unit described in a kind of any one of claim 1-9 or the air-conditioning system described in claim 10 or 11
Method processed, it is characterised in that：Including：
Refrigeration mode, two reversal valves (5) are in first position, and the heating solenoid valve (71) is closed, the refrigeration
Solenoid valve (72) is opened, and the refrigerant of compressor (3) discharge passes through First Heat Exchanger (41) and the second heat exchanger (42) respectively
Afterwards and it flow in the indoor unit (101) and freezes；
Heating mode, two reversal valves (5) are in the second position, and the refrigeration solenoid valve (72) is closed, the heating
Solenoid valve (71) is opened, and the refrigerant of compressor (3) discharge changes after the indoor unit (101) heating by first respectively
Hot device (41) and the second heat exchanger (42) are back in compressor (3)；
First Heat Exchanger (41) defrost pattern, first reversal valve (51) is in the second position, second reversal valve (52)
In first position, the heating solenoid valve (71) is opened, and the refrigeration solenoid valve (72) is closed, compressor (3) discharge
Refrigerant respectively by indoor unit (101) and First Heat Exchanger (41) heating after cocurrent, and pass through second heat exchanger (42)
It is back in compressor (3)；
Second heat exchanger (42) defrost pattern, second reversal valve (52) is in the second position, first reversal valve (51)
In first position, the heating solenoid valve (71) is opened, and the refrigeration solenoid valve (72) is closed, compressor (3) discharge
Refrigerant respectively by indoor unit (101) and the second heat exchanger (42) heating after cocurrent, and by the First Heat Exchanger (41)
It is back in compressor (3).
13. control method according to claim 11, it is characterised in that：It further includes：
Cryogenic refrigeration pattern, when outdoor environment is less than the first set temperature, and system low-voltage is less than the first setting value, second changes
To valve (52) in the second position, the first reversal valve (51) is opened in first position, refrigeration solenoid valve (72), the second throttling dress
It puts (62) and heating solenoid valve (71) is closed, the refrigerant of compressor (3) discharge is successively by the first reversal valve (51), first
It is back in compressor (3) after heat exchanger (41) and indoor unit (101)；
High temperature heating mode, when outdoor environment higher than the set temperature, and when system low-voltage is higher than the second setting value, described the
Two reversal valves (52) are opened in the second position, first reversal valve (51) in first position, heating solenoid valve (71), institute
It states second throttling device (62) and refrigeration solenoid valve (72) is closed, the refrigerant of compressor (3) discharge passes through indoor unit successively
(101), it is back in compressor (3) after First Heat Exchanger (41) and the first reversal valve (51).
14. control method according to claim 12, it is characterised in that：First set temperature be 0 DEG C, described first
Setting value is -2 DEG C, and second set temperature is 30 DEG C, and second setting value is 55 DEG C.
15. control method according to claim 11, it is characterised in that：If the First Heat Exchanger (41) and described second
When heat exchanger (42) detects defrost signal, then into the second heat exchanger (42) defrost pattern, and in second heat exchanger
(42) after the completion of defrost, into First Heat Exchanger (41) defrost pattern.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810002440.9A CN108168138A (en) | 2018-01-02 | 2018-01-02 | Outdoor unit, air conditioning system and control method |
| PCT/CN2018/121879 WO2019134509A1 (en) | 2018-01-02 | 2018-12-19 | Outdoor unit, air conditioning system, and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810002440.9A CN108168138A (en) | 2018-01-02 | 2018-01-02 | Outdoor unit, air conditioning system and control method |
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| CN201810002440.9A Pending CN108168138A (en) | 2018-01-02 | 2018-01-02 | Outdoor unit, air conditioning system and control method |
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| WO (1) | WO2019134509A1 (en) |
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| CN109405336A (en) * | 2018-11-07 | 2019-03-01 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| WO2019134509A1 (en) * | 2018-01-02 | 2019-07-11 | 珠海格力电器股份有限公司 | Outdoor unit, air conditioning system, and control method |
| WO2019227911A1 (en) * | 2018-05-29 | 2019-12-05 | 珠海格力电器股份有限公司 | Outdoor unit and air conditioning system |
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| WO2019134509A1 (en) | 2019-07-11 |
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