CN109579194A - A kind of air-conditioning system and its working method with outdoor unit defrosting function - Google Patents
A kind of air-conditioning system and its working method with outdoor unit defrosting function Download PDFInfo
- Publication number
- CN109579194A CN109579194A CN201811645684.5A CN201811645684A CN109579194A CN 109579194 A CN109579194 A CN 109579194A CN 201811645684 A CN201811645684 A CN 201811645684A CN 109579194 A CN109579194 A CN 109579194A
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- China
- Prior art keywords
- refrigerant
- defrosting
- control valve
- heat exchanger
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
-
- 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
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air-conditioning systems and its working method with outdoor unit defrosting function, increasing newly in air-conditioning system three has defrosting branch and refrigerant return branch, wherein, defrosting branch one end is connected with the refrigerant input terminal of outdoor heat exchanger, the other end is connected with the refrigerant output end of compressor, and refrigerant return branch one end is connected with the refrigerant output end of indoor heat exchanger, the other end is connected with the refrigerant input terminal of compressor；Defrosting branch road is provided with the first control valve for controlling defrosting branch connection or truncation, meanwhile, refrigerant return branch road is provided with the second control valve for controlling refrigerant return branch connection or truncation；It closes and ends when electric expansion valve, first control valve and second control valve are opened, so that the high temperature refrigerant of compressor refrigerant output end output, which enters outdoor heat exchanger by the branch that defrosts, carries out heat exchange defrosting, meanwhile so that the low temperature refrigerant after exchanging heat in indoor heat exchanger directly passes through refrigerant return branch and is back to the compressor.
Description
Technical field
The present invention relates to air-conditioning system technical fields, more particularly, to a kind of air-conditioning system with outdoor unit defrosting function
And its working method.
Background technique
Currently, air conditioner heat pump system mainly uses the refrigerants reversing mechanism such as four-way reversing valve to carry out continuous switching mode progress
Defrosting；When air-conditioning enters defrosting mode, four-way valve commutates, and air-conditioning switches to refrigerating operaton by heating operation, thus right
Outdoor unit is heated, and is increased by temperature and is melted frost layer, reaches defrosting effect, after, four-way valve commutates again, air-conditioning
System switches back into heating operation from defrosting mode；In this way, carrying out periodically reverse switching fortune to outdoor unit by four-way valve commutation
Row, to achieve the purpose that defrosting；Air-conditioning does not heat during defrosting, if defrosting time is too long, can make to indoor comfort
At influence；And the existing Defrost technology that do not commutate, such as phase-transition heat-storage defrosting, vibration of ultrasonic wave defrosting, higher cost, it is difficult to universal
It uses.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of indoor heating and defrosting at the same carry out, energy
Greatly improve the air-conditioning system and its working method with outdoor unit defrosting function of users'comfort.
To achieve the above object, scheme provided by the invention are as follows: a kind of air-conditioning system with outdoor unit defrosting function, packet
Include the refrigerant heat-exchanging loop connected and composed by compressor, outdoor heat exchanger, electric expansion valve and indoor heat exchanger；Also wrap
Defrosting branch and refrigerant return branch are included, wherein the refrigerant input terminal of described defrosting branch one end and the outdoor heat exchanger
It is connected, the other end is connected with the refrigerant output end of the compressor, and refrigerant return branch one end and the interior
The refrigerant output end of heat exchanger is connected, and the other end is connected with the refrigerant input terminal of the compressor；The defrosting branch road
It is provided with the first control valve for controlling defrosting branch connection or truncation, meanwhile, the refrigerant return branch road is provided with control
Make the second control valve of refrigerant return branch connection or truncation；In defrost mode, synchronously, the electric expansion valve closes
Cut-off is closed, first control valve and second control valve are opened, so that the height of compressor refrigerant output end output
Warm refrigerant enters outdoor heat exchanger by the branch that defrosts and carries out heat exchange defrosting, meanwhile, so that after exchanging heat in the indoor heat exchanger
Low temperature refrigerant directly pass through refrigerant return branch and be back to the compressor.
Further, the defrosting branch and refrigerant return branch road are not provided with the first check valve and second respectively unidirectionally
Valve.
Further, first control valve and the second control valve are solenoid valve.
It further, further include having the temperature sensor being set on the outdoor heat exchanger, wherein when the temperature sensing
When the temperature that device detects is lower than preset first threshold values, the air-conditioning system enters defrosting mode, and synchronously, the electronics is swollen
Swollen valve cut-off, first control valve and second control valve are opened, when the temperature that the temperature sensor detects is higher than
When preset second threshold values, the air-conditioning system exits defrosting mode, and synchronously, the electric expansion valve is opened, and described first
Control valve and second control valve cut-off.
Further, the refrigerant heat-exchanging loop further includes having four-way valve.
Further, the refrigerant input terminal of the compressor is additionally provided with gas-liquid separator.
A kind of working method of the air-conditioning system with outdoor unit defrosting function, when air-conditioning system enters defrosting mode, electricity
Sub- expansion valve closes cut-off, and the first control valve and the second control valve are opened, the high temperature refrigerant of the refrigerant output end output of compressor
Separately flow into outdoor heat exchanger and indoor heat exchanger, with respectively synchronously to outdoor heat exchanger and indoor heat exchanger into
Row heating.
Further, when air-conditioning system exits defrosting mode, electric expansion valve is opened, and the first control valve and the second control valve are cut
Only, the high temperature refrigerant of the refrigerant output end output of compressor all flows into indoor heat exchanger.
Compared with the prior art, the beneficial effect of the present invention is that passing through electric expansion valve, the first control valve and the second control
The unlatching or cut-off of valve are, it can be achieved that carry out defrosting operation simultaneously under air-conditioning system heating mode, with traditional defrosting needs four
The Defrost mode that port valve constantly commutates is compared, and defrosting and heating are not interfere with each other, will not be right while greatly improving defrosting efficiency
Indoor temperature is interfered, and the comfort level of indoor environment is substantially increased；And structure is simple, installation difficulty is low, at low cost, value
It must promote the use of.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is work flow diagram of the invention.
Wherein, 1- compressor, 2- outdoor heat exchanger, 3- electric expansion valve, 4- indoor heat exchanger, 5- four-way valve, 6- gas-liquid
Separator, 7- defrosting branch, the first control valve of 71-, 8- refrigerant return branch, the second control valve of 81-.
Specific embodiment
The present invention is further explained in the light of specific embodiments:
Referring to shown in attached drawing 1 and attached drawing 2, the present embodiment is a kind of air-conditioning system with outdoor unit defrosting function；Include by
Compressor 1, outdoor heat exchanger 2, electric expansion valve 3, indoor heat exchanger 4, four-way valve 5 and gas-liquid separator 6 are connected and composed
Refrigerant heat-exchanging loop, wherein the refrigerant input terminal of compressor 1 is connected with the output end of gas-liquid separator 6, outdoor heat exchanger
By the refrigerant transfer pipeline that is preset with, (electric expansion valve 3 is set to the refrigerant transfer pipeline between 2 and indoor heat exchanger 4
On) be connected, four ports of four-way valve 5 pass through the refrigerant transfer pipeline being preset with respectively with the input terminal of gas-liquid separator 6,
Refrigerant output end, outdoor heat exchanger 2 and the indoor heat exchanger 4 of compressor 1 are connected.
It further, further include having defrosting branch 7 and refrigerant return branch 8, wherein defrosting branch 7 is a refrigerant delivery pipe
(in the present embodiment, the refrigerant input terminal of outdoor heat exchanger 2 is sky to the refrigerant input terminal of road, one end and outdoor heat exchanger 2
Adjusting system be heating mode when outdoor heat exchanger 2 refrigerant input port, specially in outdoor heat exchanger 2 with indoor heat exchanger 4
The port of connection) it is connected, the other end is connected with the refrigerant output end of compressor 1, and 8 one end of refrigerant return branch and interior
(it is heating mould that in the present embodiment, the refrigerant output end of indoor heat exchanger 4 is air-conditioning system to the refrigerant output end of heat exchanger 4
The refrigerant output port of indoor heat exchanger 4 when formula, the port specially being connect in indoor heat exchanger 4 with outdoor heat exchanger 2) it is connected
Logical, the other end is connected with the refrigerant input terminal of compressor 1；Defrosting branch 7 on be provided with control the defrosting branch 7 connection or
First control valve 71 of truncation, meanwhile, it is provided on refrigerant return branch 8 and controls the refrigerant return branch 8 connection or truncation
The second control valve 81, specifically, the first control valve 71 and the second control valve 81 are solenoid valve.
In the present embodiment, the first check valve and the second list are respectively arranged on defrosting branch 7 and refrigerant return branch 8
To valve, the refluence phenomenon of refrigerant when preventing defrosting branch 7 to be connected to refrigerant return branch 8.
It in the present embodiment, further include having temperature sensor (specifically, the temperature biography being set on outdoor heat exchanger 2
Sensor is installed on the place that outdoor heat exchanger 2 is easiest to frosting, generally the refrigerant output of outdoor heat exchanger 2 or input terminal
Mouthful), wherein the temperature sensor is used for the temperature of real-time detection outdoor heat exchanger 2, judges outdoor by the temperature detected
Whether heat exchanger 2 needs to carry out defrosting operation, to control whether air-conditioning system enters defrosting mode.
In the present embodiment, further include having controller, the controller respectively with the first control valve 71, the second control valve 81,
Electric expansion valve 3 and the connection of temperature sensor phase telecommunications, the controller is by the collected temperature of temperature sensor and presets
Fixed threshold temperature compares to the unlatching or cut-off of control the first control valve 71, the second control valve 81, electric expansion valve 3
To realize the control of refrigerant flow direction；The controller generally uses single-chip microcontroller or has the function of the control of signal transmitting and receiving and processing function
Coremaking piece, by the acquisition of signal, processing and transmitting to which the aperture of control valve (actuator) is to control pipeline fluid
On-off is conventional technology.
In the present embodiment, air-conditioning system working method the following steps are included:
When lower than preset first threshold values, (the first threshold values carries out the temperature that temperature sensor detects according to actual use environment
Setting) when, air-conditioning system enters defrosting mode, and synchronously, electric expansion valve 3 ends, the first control valve 71 and second control
Valve 81 processed is opened, and the high temperature refrigerant of the refrigerant output end output of compressor 1 separately flows into outdoor heat exchanger 2 and interior
A part of high temperature refrigerant of heat exchanger 4(enters outdoor heat exchanger 2 by defrosting branch 7, and a part of high temperature refrigerant passes through four-way valve 5
Enter the room heat exchanger 4), synchronously to be heated respectively to outdoor heat exchanger 2 and indoor heat exchanger 4, until when temperature passes
The temperature that sensor detects is higher than preset second threshold values, and (the second threshold values is configured according to actual use environment, and second
Threshold values is greater than the first threshold values) when, air-conditioning system exits defrosting mode, and synchronously, electric expansion valve 3 is opened, the first control valve 71
End with the second control valve 81, at this point, the high temperature refrigerant that the refrigerant output end of compressor 1 exports all flows into indoor heat exchanger
4。
In this way, it can be achieved that carrying out defrosting operation simultaneously under air-conditioning system heating mode, needed with traditional defrosting
The Defrost mode that four-way valve 5 constantly commutates is compared, and defrosting and heating are not interfere with each other, while greatly improving defrosting efficiency, not yet
Indoor temperature can be interfered, substantially increase the comfort level of indoor environment；And structure is simple, installation difficulty is low, cost
It is low, it is worth of widely use.
In addition, it should be noted that, the specific embodiments described in this specification, each section title etc. can not
Together, the equivalent or simple change that all structure, feature and principles described according to the invention patent design are done, is included in the present invention
In the protection scope of patent.Those skilled in the art can do described specific embodiment various each
The mode that the modify or supplement or adopt of sample is similar substitutes, and without departing from structure of the invention or surmounts the claims
Defined range, is within the scope of protection of the invention.
Claims (8)
1. a kind of air-conditioning system with outdoor unit defrosting function, includes swollen by compressor (1), outdoor heat exchanger (2), electronics
The refrigerant heat-exchanging loop that swollen valve (3) and indoor heat exchanger (4) are connected and composed；It is characterized by also including have defrosting branch
(7) and refrigerant return branch (8), wherein the refrigerant input terminal of described defrosting branch (7) one end and the outdoor heat exchanger (2)
It is connected, the other end is connected with the refrigerant output end of the compressor (1), and described refrigerant return branch (8) one end and institute
The refrigerant output end for stating indoor heat exchanger (4) is connected, and the other end is connected with the refrigerant input terminal of the compressor (1)；Institute
The first control valve (71) for being provided in defrosting branch (7) and controlling the defrosting branch (7) connection or truncation is stated, meanwhile, it is described
The second control valve (81) for controlling the refrigerant return branch (8) connection or truncation is provided on refrigerant return branch (8)；It is removing
Under white mode, synchronously, the electric expansion valve (3) closes cut-off, first control valve (71) and second control valve
(81) it opens, so that the high temperature refrigerant of the compressor (1) refrigerant output end output is changed by defrosting branch (7) into outdoor
Hot device (2) carries out heat exchange defrosting, meanwhile, so that the low temperature refrigerant in the indoor heat exchanger (4) after heat exchange directly passes through refrigerant
Reflux branch (8) is back to the compressor (1).
2. a kind of air-conditioning system with outdoor unit defrosting function according to claim 1, it is characterised in that: the defrosting
The first check valve and second one-way valve are respectively arranged on branch (7) and refrigerant return branch (8).
3. a kind of air-conditioning system with outdoor unit defrosting function according to claim 1, it is characterised in that: described first
Control valve (71) and the second control valve (81) are solenoid valve.
4. a kind of air-conditioning system with outdoor unit defrosting function according to claim 1, it is characterised in that: further include having
The temperature sensor being set on the outdoor heat exchanger (2), wherein when the temperature that the temperature sensor detects is lower than pre-
If the first threshold values when, the air-conditioning system enters defrosting mode, synchronously, the electric expansion valve (3) cut-off, described first
Control valve (71) and second control valve (81) are opened, when the temperature that the temperature sensor detects is higher than preset second
When threshold values, the air-conditioning system exits defrosting mode, and synchronously, the electric expansion valve (3) is opened, first control valve
(71) end with second control valve (81).
5. a kind of air-conditioning system with outdoor unit defrosting function according to claim 1, it is characterised in that: the refrigerant
Heat-exchanging loop further includes having four-way valve (5).
6. a kind of air-conditioning system with outdoor unit defrosting function according to claim 1, it is characterised in that: the compression
The refrigerant input terminal of machine (1) is additionally provided with gas-liquid separator (6).
7. a kind of working method of the air-conditioning system with outdoor unit defrosting function as described in claim 1 to 6, feature exist
In: when air-conditioning system enters defrosting mode, electric expansion valve (3) closes cut-off, the first control valve (71) and the second control valve
(81) it opens, the high temperature refrigerant of the refrigerant output end output of compressor (1) separately flows into outdoor heat exchanger (2) and room
Interior heat exchanger (4), synchronously to be heated respectively to outdoor heat exchanger (2) and indoor heat exchanger (4).
8. a kind of working method of air-conditioning system with outdoor unit defrosting function according to claim 7, feature exist
In: when air-conditioning system exits defrosting mode, electric expansion valve (3) is opened, and the first control valve (71) and the second control valve (81) are cut
Only, the high temperature refrigerant of the refrigerant output end output of compressor (1) all flows into indoor heat exchanger (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645684.5A CN109579194A (en) | 2018-12-29 | 2018-12-29 | A kind of air-conditioning system and its working method with outdoor unit defrosting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645684.5A CN109579194A (en) | 2018-12-29 | 2018-12-29 | A kind of air-conditioning system and its working method with outdoor unit defrosting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109579194A true CN109579194A (en) | 2019-04-05 |
Family
ID=65933658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811645684.5A Pending CN109579194A (en) | 2018-12-29 | 2018-12-29 | A kind of air-conditioning system and its working method with outdoor unit defrosting function |
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| Country | Link |
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| CN (1) | CN109579194A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686342A (en) * | 2019-10-14 | 2020-01-14 | 青岛海尔空调电子有限公司 | Air conditioning unit with defrosting branch |
| CN110736205A (en) * | 2019-09-25 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN111854217A (en) * | 2019-04-30 | 2020-10-30 | 广东志高暖通设备股份有限公司 | Air conditioning system without reversing defrosting and working method thereof |
| CN112762518A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Air conditioning unit and control method thereof |
| CN115164458A (en) * | 2022-07-26 | 2022-10-11 | 海信空调有限公司 | Air conditioner and oil blockage prevention control method thereof |
| CN115183406A (en) * | 2022-07-25 | 2022-10-14 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
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| CN104422215A (en) * | 2013-08-28 | 2015-03-18 | 海尔集团公司 | Air conditioning system and defrosting method for same |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111854217A (en) * | 2019-04-30 | 2020-10-30 | 广东志高暖通设备股份有限公司 | Air conditioning system without reversing defrosting and working method thereof |
| CN110736205A (en) * | 2019-09-25 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110686342A (en) * | 2019-10-14 | 2020-01-14 | 青岛海尔空调电子有限公司 | Air conditioning unit with defrosting branch |
| CN112762518A (en) * | 2020-12-31 | 2021-05-07 | 青岛海尔空调电子有限公司 | Air conditioning unit and control method thereof |
| CN115183406A (en) * | 2022-07-25 | 2022-10-14 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
| CN115183406B (en) * | 2022-07-25 | 2024-03-22 | 青岛海尔空调电子有限公司 | Control method of air conditioning system |
| CN115164458A (en) * | 2022-07-26 | 2022-10-11 | 海信空调有限公司 | Air conditioner and oil blockage prevention control method thereof |
| CN115164458B (en) * | 2022-07-26 | 2023-10-13 | 海信空调有限公司 | Air conditioner and oil blocking prevention control method thereof |
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