CN104833152B - A kind of liquid impact prevention air conditioner defrosting system - Google Patents
A kind of liquid impact prevention air conditioner defrosting system Download PDFInfo
- Publication number
- CN104833152B CN104833152B CN201510287888.6A CN201510287888A CN104833152B CN 104833152 B CN104833152 B CN 104833152B CN 201510287888 A CN201510287888 A CN 201510287888A CN 104833152 B CN104833152 B CN 104833152B
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- Prior art keywords
- heat exchanger
- compressor
- fluid reservoir
- outdoor unit
- check valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
-
- 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
- F25B43/006—Accumulators
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/01—Heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of liquid impact prevention air conditioner defrosting system, including compressor (1), four-way reversing valve (2), indoor set heat exchanger (3), throttling arrangement (4) and outdoor unit heat exchanger (5), four ports of the four-way reversing valve (2) are exported with compressor (1) respectively, one end of indoor set heat exchanger (3), one end of outdoor unit heat exchanger (5) is connected with compressor (1) import, the two ends of the throttling arrangement (4) are connected with the other end of indoor set heat exchanger (3) and the other end of outdoor unit heat exchanger (5) respectively.The fluid reservoir (6) of separable gas-liquid two-phase cold-producing medium is set between four-way reversing valve (2) and compressor (1) import, can liquid impact prevention.Heating coil (9) and electric heater (7) are provided with the fluid reservoir (6), may be either that outdoor unit heat exchanger (5) offer high-temperature high-pressure refrigerant gas is defrosted, indoor set heat exchanger (3) continuously provides heat for interior during ensuring that defrosting.
Description
Technical field
The present invention relates to a kind of air-conditioning system, especially a kind of liquid impact prevention air conditioner defrosting system belongs to refrigeration and sky
Conditioning technology field.
Background technology
When air-conditioning system operates in winter heating's operating mode, the low-temperature refrigerant liquid in outdoor unit heat exchanger pipe passes through heat exchange
The fin of device absorbs heat to surrounding air.When outdoor unit heat exchanger fin temperature is less than surrounding air dew-point temperature, in air
Vapor can condense in fin surface；When fin temperature is less than 0 DEG C, condensation water can freeze and gradually grow into fin surface
Frost.The formation of frost adds heat transfer resistance between fin and air, is easily caused outdoor unit heat exchanger inner refrigerant and evaporates insufficient, steams
Hair device outlet superheat degree, which reduces, is even unable to reach overheat, so as to cause compressor to occur liquid hammer and damage.Ensure air-conditioning system
The normal operation of system heating condition in the winter time, it is necessary to take into account the defrosting problem of outdoor unit heat exchanger.
Found by the literature survey to prior art, the principle of current air-conditioning system defrosting is by the height of compressor outlet
Warm high-pressure refrigerant is passed directly into outdoor unit heat exchanger and defrosted.When in this way, if by all compressors
Refrigerant is all passed through outdoor unit heat exchanger, then can not be heated in room in defrosting；If the system for only coming out Partial shrinkage machine
Cryogen is passed through outdoor unit heat exchanger, then being easily caused compressor in defrosting occurs liquid hammer.Chinese patent discloses (bulletin) number
CN2494962Y patent " counter-circulating defroster for refrigerating equipment " makes the inverse circulation work of system by switching four-way reversing valve, high
Warm higher pressure refrigerant gas is directly entered defrost in outdoor unit heat exchanger after being come out from compressor；Now indoor set heat exchanger can be held
Continue to indoor conveying cold air, interrupt indoor heating.Chinese patent discloses patent " the band heat that (bulletin) number is CN203964453
The air conditioner of gas bypass circulation " keeps air-conditioning system heating mode constant, by by a part of high-temperature refrigeration of compressor outlet
Agent gas bypass, to melt frost layer, now easily reaches to outdoor unit heat exchanger heat release after the heat release of outdoor unit heat exchanger tube refrigerant
Two-phase state, so as to cause compressor to occur liquid hammer and damage.
The content of the invention
It is an object of the invention to design a kind of liquid impact prevention air conditioner defrosting system, current air-conditioning system Defrost mode is overcome
Deficiency, makes air-conditioning system both can persistently provide heat to interior in defrosting, can prevent compressor from occurring liquid hammer again.This is
A reservoir is connected under controlling heat pattern between four-way reversing valve and compressor inlet, refrigerant is carried out in reservoir
Gas-liquid separation, so as to avoid compressor from occurring liquid hammer.Increase storage by heating the refrigerant in fluid reservoir in defrost mode
Flow container internal pressure, improves the pressure and evaporating temperature of outdoor unit heat exchanger refrigerant, so as to lift heat exchanger fin surface
Temperature is to defrost, and wherein the heating amount of fluid reservoir is originated including two parts, and a part comes from compressor outlet and bypassed to the storage
The heat of the high temperature refrigerant of flow container；A part comes from the heat that the electric heater installed inside fluid reservoir is provided.
The present invention is achieved by the following technical solutions.The present invention relates to a kind of liquid impact prevention air conditioner defrosting system, including
Compressor, four-way reversing valve, indoor set heat exchanger, throttling arrangement and outdoor unit heat exchanger, four ends of the four-way reversing valve
Mouth is connected with compressor outlet, one end of indoor set heat exchanger, one end of outdoor unit heat exchanger and compressor inlet respectively, described
The two ends of throttling arrangement are connected with the other end of indoor set heat exchanger and the other end of outdoor unit heat exchanger respectively, and four-way is changed
To the fluid reservoir that achievable gas-liquid separation is provided between valve and compressor inlet.
As a kind of preferred structure of the present invention, the built-in system pipeline distribution of the fluid reservoir is as follows：Commutated by four-way
The pipeline that valve stretches out is in more than the liquid level of fluid reservoir；The pipe end stretched out by compressor inlet be in liquid storage jar liquid surface with
On.More optimizedly, in the middle part of the pipeline that compressor inlet is stretched out below fluid reservoir liquid level.
As present invention further optimization structure, the liquid level of the fluid reservoir is arranged below a heating coil, it is described plus
That one end that one end of hot coil is connected the indoor set heat exchanger with the throttling arrangement is connected, and the other end is unidirectional by first
The outlet connection of valve and compressor.
As the still more preferably structure of the present invention, set between the import of the compressor and the four-way reversing valve
There is the second check valve, the 3rd check valve is provided between the throttling arrangement and the outdoor unit heat exchanger, the fluid reservoir leads to
Cross the 4th check valve and the 5th check valve is in parallel with second check valve, the fluid reservoir is single by the 6th check valve and the 7th
It is in parallel with the 3rd check valve to valve.
As the further improvement of above-mentioned preferred structure, electric heater is additionally provided with below the liquid storage jar liquid surface.It is more excellent
Change, described electric heater has heating power supply.
When present system operates in heating mode, fluid reservoir is not turned on heating function, and outdoor unit heat exchanger is in frosting
It can cause that the refrigerant heat exchanger for flowing through outdoor unit heat exchanger is insufficient afterwards, the two phase refrigerant into outdoor unit heat exchanger can not be complete
Pervaporation is into gas, and it is still two-phase to cause outdoor unit heat exchanger to export refrigerant, and two phase refrigerant is entered by fluid reservoir import
In fluid reservoir and complete gas-liquid separation, refrigerant gas flows back to compressor inlet, the import and export of fluid reservoir by fluid reservoir outlet
More than liquid level, it is to avoid compressor air suction band liquid, so as to ensure that compressor inlet is refrigerant gas, it is to avoid compressor liquid
Hit.
When system operation is in defrosting mode, fluid reservoir opens heating function, the high temperature refrigerant gas of compressor outlet
Be divided into two-way, all the way after four-way heat exchange valve flow into indoor set heat exchanger give off heat to interior persistently heat；Another road warp
The heating coil heat release flowed into after check valve in fluid reservoir is crossed, and electric heater heats the refrigerant in fluid reservoir together, makes height
Warm higher pressure refrigerant gas, which is flowed into outdoor unit heat exchanger, melts frost layer.
The present invention has significant advantage and positive effect.First, the present invention can avoid outdoor unit heat exchanger frosting
Caused compressor liquid hammer problem；Second, the present invention can form the outer machine heat exchanger of high-temperature high-pressure refrigerant gas into chamber and realize
Melt frost layer；3rd, remain able to be continuously indoor heating during defrosting.
Brief description of the drawings
Fig. 1 is common air-conditioning system schematic.
Fig. 2 is air-conditioning system connection diagram of the present invention.
Fig. 3 is the normal heating mode schematic diagram of air-conditioning system of the present invention.
Fig. 4 is air-conditioning system defrosting mode schematic diagram of the present invention.
Description of reference numerals：1-compressor；2-four-way reversing valve；3-indoor set heat exchanger；4-throttling arrangement；5—
Outdoor unit heat exchanger；6-fluid reservoir；7-electric heater；8-heating power supply；9-heating coil；10-16-check valve.
Embodiment
The specific implementation to the present invention is further described below in conjunction with the accompanying drawings.
This patent devises a kind of new air-conditioning system, the compressor 1 that is included in common air-conditioning system (shown in Fig. 1),
On the basis of four-way reversing valve 2, indoor set heat exchanger 3, throttling arrangement 4 and outdoor unit heat exchanger 5, add fluid reservoir 6, electricity and add
Hot device 7, heating power supply 8, heating coil 9 and check valve 10-16.
The specific embodiment of this liquid impact prevention air conditioner defrosting system is：
(1) normal heating mode, as shown in Figure 3.Check valve 12,14,16 be in opening, check valve 10,11,13,
15 are closed.The high temperature refrigerant gas that compressor 1 is discharged gets in the quilt of machine heat exchanger 3 by four-way reversing valve 2
Condense and to indoor releasing heat.Cold-producing medium stream enters outdoor unit heat exchanger 5 by check valve 12 after choke valve 4 and evaporates suction
Heat, the refrigerant of outflow enters in fluid reservoir 6 after four-way reversing valve 2, and refrigerant carries out gas-liquid separation in fluid reservoir 6,
Gaseous refrigerant is inhaled into compressor 1 by check valve 16 and completes normal heating mode.The pattern can ensure to change in outdoor unit
Liquid hit phenomenon will not still occur for compressor 1 in the case of the hot frosting of device 5.
(2) defrosting mode, as shown in Figure 4.Check valve 12,14,16 is closed, at check valve 10,11,13,15
In opening.The high temperature refrigerant gas that compressor 1 is discharged is divided into two-way, wherein entering to enter the room by four-way reversing valve 2 all the way
Interior machine heat exchanger 3 is condensed and to indoor releasing heat；Another road is entered by check valve 10 in the heating coil 9 of fluid reservoir 6
Refrigerant liquid in fluid reservoir 6 is heated, high temperature and high pressure gas are become.The system flowed out from indoor set heat exchanger 3
Cryogen and from fluid reservoir 6 heating coil 9 flow out refrigerant converge after by throttling arrangement 4, pass through check valve again afterwards
11 flow into fluid reservoir 6.Refrigerant enters heated coil pipe 9 or electric heater 7 after fluid reservoir 6 and heated.High temperature system after heating
Refrigerant gas is defrosted by being flowed into after check valve 13 in outdoor unit heat exchanger 5.Final refrigerant gas is commutated by four-way
Flowed back to after valve 2 and check valve 15 in compressor 1, complete defrosting circulation.The pattern can ensure that indoor set exchanges heat during defrosting
Device 3 is continuously indoor offer heat.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (3)
1. a kind of liquid impact prevention air conditioner defrosting system, including compressor (1), four-way reversing valve (2), indoor set heat exchanger (3), throttling
Device (4) and outdoor unit heat exchanger (5), four ports of the four-way reversing valve (2) respectively with compressor (1) outlet, indoor
One end, one end of outdoor unit heat exchanger (5) of machine heat exchanger (3) are connected with compressor (1) import, the throttling arrangement (4)
Two ends are connected with the other end of indoor set heat exchanger (3) and the other end of outdoor unit heat exchanger (5) respectively, it is characterised in that four
The logical fluid reservoir (6) that achievable gas-liquid separation is provided between reversal valve (2) and compressor (1) import；
The liquid level of the fluid reservoir (6) is arranged below heating coil (9), one end and the throttling of the heating coil (9)
That one end that device (4) connects the indoor set heat exchanger (3) is connected, and the other end passes through the first check valve (10) and compressor
(1) outlet connection；
The second check valve (15), the throttling dress are provided between the import of the compressor (1) and the four-way reversing valve (2)
Put and the 3rd check valve (12) is provided between (4) and the outdoor unit heat exchanger (5), the fluid reservoir (6) is unidirectional by the 4th
Valve (14) and the 5th check valve (16) are in parallel with second check valve (15), and the fluid reservoir (6) passes through the 6th check valve
And the 7th check valve (13) is in parallel with the 3rd check valve (12) (11)；
The built-in system pipeline distribution of the fluid reservoir (6) is as follows：The pipeline stretched out by four-way reversing valve (2) is in fluid reservoir
(6) it is more than liquid level；The pipe end stretched out by compressor (1) import is in more than fluid reservoir (6) liquid level.
2. liquid impact prevention air conditioner defrosting system according to claim 1, it is characterised in that below fluid reservoir (6) liquid level
It is additionally provided with electric heater (7).
3. liquid impact prevention air conditioner defrosting system according to claim 2, it is characterised in that described electric heater (7) has
Heating power supply (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510287888.6A CN104833152B (en) | 2015-05-29 | 2015-05-29 | A kind of liquid impact prevention air conditioner defrosting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510287888.6A CN104833152B (en) | 2015-05-29 | 2015-05-29 | A kind of liquid impact prevention air conditioner defrosting system |
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| Publication Number | Publication Date |
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| CN104833152A CN104833152A (en) | 2015-08-12 |
| CN104833152B true CN104833152B (en) | 2017-08-08 |
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| CN201510287888.6A Active CN104833152B (en) | 2015-05-29 | 2015-05-29 | A kind of liquid impact prevention air conditioner defrosting system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972933A (en) * | 2016-06-24 | 2016-09-28 | 武汉贝索医疗器械有限公司 | Refrigerating system of blood plasma rapid freezer |
| CN106288564A (en) * | 2016-09-30 | 2017-01-04 | 芜湖美智空调设备有限公司 | Air conditioning system |
| CN106767079B (en) * | 2017-01-10 | 2019-01-22 | 美的集团武汉制冷设备有限公司 | Accumulation of heat component and air conditioner |
| CN107917548A (en) * | 2017-10-13 | 2018-04-17 | 珠海格力电器股份有限公司 | The control method and heat pump system of heat pump system |
| CN109163471B (en) * | 2018-07-18 | 2024-04-05 | 嘉兴学院 | Energy-saving comfortable type split heat pump air conditioning system and control method thereof |
| CN109140817B (en) * | 2018-11-02 | 2023-07-18 | 西安交通大学 | Air conditioner using heating device and control method thereof |
| CN109708284B (en) * | 2019-02-22 | 2021-04-20 | 广东欧科空调制冷有限公司 | Liquid level control method and device for gas-liquid separator after defrosting and air conditioner |
| CN109990517B (en) * | 2019-04-15 | 2019-11-05 | 宁波工程学院 | Air conditioner intelligence quickly defrosting and protection control method |
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|---|---|---|---|---|
| US3167930A (en) * | 1962-11-19 | 1965-02-02 | Freightliner Corp | Refrigeration system |
| US4318277A (en) * | 1978-10-02 | 1982-03-09 | Carrier Corporation | Non-reverse hot gas defrost system |
| CN2769735Y (en) * | 2005-02-05 | 2006-04-05 | 珠海格力电器股份有限公司 | Air conditioner with air liquid separator to assist electric heating |
| CN101078586A (en) * | 2007-07-18 | 2007-11-28 | 四川长虹电器股份有限公司 | Wind-cooling type heat pump air conditioner and control method thereof |
| CN201047687Y (en) * | 2007-06-15 | 2008-04-16 | 江苏天舒电器有限公司 | Hot gas bypass back-out concurrent heating defrost constant temperature hot-water system |
| CN102878736A (en) * | 2012-10-29 | 2013-01-16 | 姜益强 | Air source heat pump continuous heat supply defrosting system |
-
2015
- 2015-05-29 CN CN201510287888.6A patent/CN104833152B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3167930A (en) * | 1962-11-19 | 1965-02-02 | Freightliner Corp | Refrigeration system |
| US4318277A (en) * | 1978-10-02 | 1982-03-09 | Carrier Corporation | Non-reverse hot gas defrost system |
| CN2769735Y (en) * | 2005-02-05 | 2006-04-05 | 珠海格力电器股份有限公司 | Air conditioner with air liquid separator to assist electric heating |
| CN201047687Y (en) * | 2007-06-15 | 2008-04-16 | 江苏天舒电器有限公司 | Hot gas bypass back-out concurrent heating defrost constant temperature hot-water system |
| CN101078586A (en) * | 2007-07-18 | 2007-11-28 | 四川长虹电器股份有限公司 | Wind-cooling type heat pump air conditioner and control method thereof |
| CN102878736A (en) * | 2012-10-29 | 2013-01-16 | 姜益强 | Air source heat pump continuous heat supply defrosting system |
Also Published As
| Publication number | Publication date |
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| CN104833152A (en) | 2015-08-12 |
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