CN104833152A - Liquid impact preventing air conditioner defrosting system - Google Patents
Liquid impact preventing air conditioner defrosting system Download PDFInfo
- Publication number
- CN104833152A CN104833152A CN201510287888.6A CN201510287888A CN104833152A CN 104833152 A CN104833152 A CN 104833152A CN 201510287888 A CN201510287888 A CN 201510287888A CN 104833152 A CN104833152 A CN 104833152A
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- China
- Prior art keywords
- check valve
- heat exchanger
- fluid reservoir
- compressor
- air conditioner
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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
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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
- 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
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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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of 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
- 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 liquid impact preventing air conditioner defrosting system. The liquid impact preventing air conditioner defrosting system comprises a compressor (1), a four-way reversing valve (2), an indoor unit heat exchanger (3), a throttling device (4) and an outdoor unit heat exchanger (5). Four ports of the four-way reversing valve (2) are connected with an outlet of the compressor (1), one end of the indoor unit heat exchanger (3), one end of the outdoor unit heat exchanger (5) and an inlet of the compressor (1) respectively. The two ends of the throttling device (4) are connected with the other end of the indoor unit heat exchanger (3) and the other end of the outdoor unit heat exchanger (5). A liquid storage tank (6) capable of separating gas-liquid two-phase refrigerating fluid is arranged between the four-way reversing valve (2) and the inlet of the compressor (1) and is capable of preventing liquid impact. A heating coil (9) and an electric heater (7) are arranged in the liquid storage tank (6), high-temperature and high-pressure refrigerating fluid gas can be provided for the outdoor unit heat exchanger (5) for defrosting, and it can be guaranteed that the indoor unit heat exchanger (3) can continuously provide heat for a room in the defrosting process.
Description
Technical field
What the present invention relates to is a kind of air-conditioning system, and especially a kind of liquid impact prevention air conditioner defrosting system, belongs to Refrigeration & Air-Conditioning technical 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 is absorbed heat to surrounding air by the fin of heat exchanger.When outdoor unit heat exchanger fin temperature is lower than surrounding air dew-point temperature, the steam in air can condense at fin surface; When fin temperature is lower than 0 DEG C, condensation water can freeze at fin surface and grow into frost gradually.The formation of frost adds heat transfer resistance between fin and air, easily causes outdoor unit heat exchanger inner refrigerant to evaporate insufficient, and the evaporator outlet degree of superheat reduces even to reach overheated, thus causes compressor generation liquid hammer and damage.Ensure the normal operation of air-conditioning system heating condition in the winter time, be necessary the defrosting problem considering outdoor unit heat exchanger.
By finding the literature survey of prior art, the principle of current air-conditioning system defrosting is directly passed in outdoor unit heat exchanger by the high-temperature high-pressure refrigerant of compressor outlet to defrost.When adopting in this way, if all compressor refrigerants are all passed into outdoor unit heat exchanger, then when defrosting, indoor cannot heat; If only Partial shrinkage machine cold-producing medium is out passed into outdoor unit heat exchanger, then easily cause compressor generation liquid hammer when defrosting.Chinese patent open (bulletin) number makes system against periodic duty by switching four-way change-over valve for the patent " counter-circulating defroster for refrigerating equipment " of CN2494962Y, high-temperature high-pressure refrigerant gas from compressor out after directly enter defrost in outdoor unit heat exchanger; Now indoor set heat exchanger can continue to indoor conveying cold air, interrupts indoor heating.Chinese patent open (bulletin) number is that the patent " air-conditioner of band hot gas bypass circuit " of CN203964453 keeps air-conditioning system heating mode constant, by by a part of high temperature refrigerant gas bypass of compressor outlet to outdoor unit heat exchanger heat release to melt frost layer, now easily reach two-phase state after the heat release of outdoor unit heat exchanger tube refrigerant, thus cause compressor generation liquid hammer and damage.
Summary of the invention
The object of the invention is to design a kind of liquid impact prevention air conditioner defrosting system, overcome the deficiency of current air-conditioning system Defrost mode, making air-conditioning system both can continue to provide heat to indoor when defrosting, compressor generation liquid hammer can be prevented again.Between four-way change-over valve and compressor inlet, connect a reservoir under this system heating mode, in reservoir, gas-liquid separation is carried out to cold-producing medium, thus avoid compressor generation liquid hammer.Fluid reservoir internal pressure is increased in defrost mode by the cold-producing medium in heating fluid reservoir, improve pressure and the evaporating temperature of outdoor unit heat exchanger cold-producing medium, thus the temperature on lifting heat exchanger fin surface is with defrosting, wherein the heat that adds of fluid reservoir comprises two parts source, and a part comes from the heat of compressor outlet bypass to the high temperature refrigerant of this fluid reservoir; The heat that the electric heater that a part comes from the installation of fluid reservoir inside provides.
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, comprise compressor, four-way change-over valve, indoor set heat exchanger, throttling arrangement and outdoor unit heat exchanger, four ports of described four-way change-over valve are connected with compressor inlet with one end of compressor outlet, indoor set heat exchanger, one end of outdoor unit heat exchanger respectively, the two ends of described throttling arrangement are connected with the other end of outdoor unit heat exchanger with the other end of indoor set heat exchanger respectively, and are provided with the fluid reservoir that can realize gas-liquid separation between four-way change-over valve and compressor inlet.
As a kind of preferred structure of the present invention, the built-in system pipeline distribution of described fluid reservoir is as follows: the pipeline stretched out by four-way change-over valve is in more than the liquid level of fluid reservoir; The pipe end stretched out by compressor inlet is in more than fluid reservoir liquid level.More optimizedly, below fluid reservoir liquid level is in the middle part of the pipeline stretched out by compressor inlet.
As present invention further optimization structure, the liquid level of described fluid reservoir is to be arranged with heat(ing) coil, one end of described heat(ing) coil is connected described indoor set heat exchanger that one end with described throttling arrangement is connected, and the other end is connected with the outlet of compressor by the first check valve.
As further preferred structure of the present invention, the second check valve is provided with between the import of described compressor and described four-way change-over valve, the 3rd check valve is provided with between described throttling arrangement and described outdoor unit heat exchanger, described fluid reservoir by the 4th check valve and the 5th check valve in parallel with described second check valve, described fluid reservoir pass through the 6th check valve and the 7th check valve in parallel with described 3rd check valve.
As the further improvement of above-mentioned preferred structure, below described fluid reservoir liquid level, be also provided with electric heater.More optimizedly, described electric heater has heating power supply.
When present system operates in heating mode, fluid reservoir does not open heating function, outdoor unit heat exchanger can cause the refrigerant heat exchanger flowing through outdoor unit heat exchanger insufficient after frosting, the two phase refrigerant entering outdoor unit heat exchanger cannot flash to gas completely, causing outdoor unit heat exchanger to export cold-producing medium is still two-phase, two phase refrigerant to be entered in fluid reservoir by fluid reservoir import and completes gas-liquid separation, refrigerant gas returns compressor inlet by fluid reservoir outlet flow, the import and export of fluid reservoir are all more than liquid level, avoid compressor air suction band liquid, thus ensure that compressor inlet is refrigerant gas, avoid compressor liquid hammer.
When system cloud gray model is at defrosting mode, fluid reservoir opens heating function, and the high temperature refrigerant gas of compressor outlet is divided into two-way, and a road flows into the indoor set heat exchanger evolution of heat and continues to heat to indoor after four-way heat exchange valve; Another road flows into the heat(ing) coil heat release in fluid reservoir after check valve, heats the cold-producing medium in fluid reservoir together with electric heater, makes to melt frost layer in the outer machine heat exchanger of high-temperature high-pressure refrigerant gas into chamber.
The present invention has significant advantage and positive effect.The first, the compressor liquid hammer problem that the present invention can avoid outdoor unit heat exchanger frosting to cause; The second, the present invention can form the outer machine heat exchanger of high-temperature high-pressure refrigerant gas into chamber and realize melting frost layer; 3rd, in defrost process, still can be continuously indoor heating.
Accompanying drawing explanation
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 change-over 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-heat(ing) coil; 10-16-check valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiment of the invention is further described.
This patent devises a kind of new air-conditioning system, on the compressor 1 comprised in common air-conditioning system (Fig. 1 shown in), four-way change-over valve 2, indoor set heat exchanger 3, throttling arrangement 4 and outdoor unit heat exchanger 5 basis, add fluid reservoir 6, electric heater 7, heating power supply 8, heat(ing) coil 9 and check valve 10-16.
The specific embodiments of this liquid impact prevention air conditioner defrosting system is:
(1) normal heating mode, as shown in Figure 3.Check valve 12,14,16 is in opening, and check valve 10,11,13,15 is in closed condition.The high temperature refrigerant gas that compressor 1 is discharged enters indoor set heat exchanger 3 by four-way change-over valve 2 and to be condensed and to indoor releasing heat.Flow of refrigerant enters outdoor unit heat exchanger 5 evaporation endothermic by check valve 12 after choke valve 4, the cold-producing medium flowed out enters in fluid reservoir 6 after four-way change-over valve 2, cold-producing medium carries out gas-liquid separation in fluid reservoir 6, and gaseous refrigerant is inhaled in compressor 1 through check valve 16 and completes normal heating mode.This pattern can ensure that compressor 1 still liquid hit phenomenon can not occur in outdoor unit heat exchanger 5 frosting situation.
(2) defrosting mode, as shown in Figure 4.Check valve 12,14,16 is in closed condition, and check valve 10,11,13,15 is in opening.The high temperature refrigerant gas that compressor 1 is discharged is divided into two-way, and four-way change-over valve 2 of wherein leading up to enters indoor set heat exchanger 3 and to be condensed and to indoor releasing heat; Check valve 10 of separately leading up to enters in the heat(ing) coil 9 of fluid reservoir 6 and heats the refrigerant liquid in fluid reservoir 6, becomes high temperature and high pressure gas.Indoor machine heat exchanger 3 flow out cold-producing medium and from fluid reservoir 6 heat(ing) coil 9 flow out cold-producing medium converge after by throttling arrangement 4, flowed in fluid reservoir 6 by check valve 11 more afterwards.Heated by heat(ing) coil 9 or electric heater 7 after cold-producing medium enters fluid reservoir 6.High temperature refrigerant gas after heating defrosts by flowing in outdoor unit heat exchanger 5 after check valve 13.Final refrigerant gas, by flowing back in compressor 1 after four-way change-over valve 2 and check valve 15, completes defrost cycle.This pattern can to ensure that in defrost process indoor set heat exchanger 3 is continuously indoor and provide heat.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a liquid impact prevention air conditioner defrosting system, comprise compressor (1), four-way change-over valve (2), indoor set heat exchanger (3), throttling arrangement (4) and outdoor unit heat exchanger (5), four ports of described four-way change-over valve (2) export 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 described throttling arrangement (4) are connected with the other end of outdoor unit heat exchanger (5) with the other end of indoor set heat exchanger (3) respectively, it is characterized in that, the fluid reservoir (6) that can realize gas-liquid separation is provided with between four-way change-over valve (2) and compressor (1) import.
2. liquid impact prevention air conditioner defrosting system according to claim 1, it is characterized in that, the built-in system pipeline distribution of described fluid reservoir (6) is as follows: the pipeline stretched out by four-way change-over valve (2) is in more than the liquid level of fluid reservoir (6); The pipe end stretched out by compressor (1) import is in more than fluid reservoir (6) liquid level.
3. liquid impact prevention air conditioner defrosting system according to claim 1, it is characterized in that, the liquid level of described fluid reservoir (6) is to be arranged with heat(ing) coil (9), one end of described heat(ing) coil (9) is connected described indoor set heat exchanger (3) that one end with described throttling arrangement (4) is connected, and the other end is connected with the outlet of compressor (1) by the first check valve (10).
4. liquid impact prevention air conditioner defrosting system according to claim 2, it is characterized in that, the liquid level of described fluid reservoir (6) is to be arranged with heat(ing) coil (9), one end of described heat(ing) coil (9) is connected described indoor set heat exchanger (3) that one end with described throttling arrangement (4) is connected, and the other end is connected with the outlet of compressor (1) by the first check valve (10).
5. liquid impact prevention air conditioner defrosting system according to claim 1, it is characterized in that, the second check valve (15) is provided with between the import of described compressor (1) and described four-way change-over valve (2), the 3rd check valve (12) is provided with between described throttling arrangement (4) and described outdoor unit heat exchanger (5), described fluid reservoir (6) by the 4th check valve (14) and the 5th check valve (16) in parallel with described second check valve (15), described fluid reservoir (6) by the 6th check valve (11) and the 7th check valve (13) in parallel with described 3rd check valve (12).
6. liquid impact prevention air conditioner defrosting system according to claim 2, it is characterized in that, the second check valve (15) is provided with between the import of described compressor (1) and described four-way change-over valve (2), the 3rd check valve (12) is provided with between described throttling arrangement (4) and described outdoor unit heat exchanger (5), described fluid reservoir (6) by the 4th check valve (14) and the 5th check valve (16) in parallel with described second check valve (15), described fluid reservoir (6) by the 6th check valve (11) and the 7th check valve (13) in parallel with described 3rd check valve (12).
7. liquid impact prevention air conditioner defrosting system according to claim 3, it is characterized in that, the second check valve (15) is provided with between the import of described compressor (1) and described four-way change-over valve (2), the 3rd check valve (12) is provided with between described throttling arrangement (4) and described outdoor unit heat exchanger (5), described fluid reservoir (6) by the 4th check valve (14) and the 5th check valve (16) in parallel with described second check valve (15), described fluid reservoir (6) by the 6th check valve (11) and the 7th check valve (13) in parallel with described 3rd check valve (12).
8. liquid impact prevention air conditioner defrosting system according to claim 4, it is characterized in that, the second check valve (15) is provided with between the import of described compressor (1) and described four-way change-over valve (2), the 3rd check valve (12) is provided with between described throttling arrangement (4) and described outdoor unit heat exchanger (5), described fluid reservoir (6) by the 4th check valve (14) and the 5th check valve (16) in parallel with described second check valve (15), described fluid reservoir (6) by the 6th check valve (11) and the 7th check valve (13) in parallel with described 3rd check valve (12).
9. the liquid impact prevention air conditioner defrosting system according to any one of claim 1 ~ 8, is characterized in that, is also provided with electric heater (7) below described fluid reservoir (6) liquid level.
10. liquid impact prevention air conditioner defrosting system according to claim 9, is characterized 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510287888.6A CN104833152B (en) | 2015-05-29 | 2015-05-29 | A kind of liquid impact prevention air conditioner defrosting system |
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| CN104833152A true CN104833152A (en) | 2015-08-12 |
| CN104833152B CN104833152B (en) | 2017-08-08 |
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Cited By (8)
| 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 |
| CN106767079A (en) * | 2017-01-10 | 2017-05-31 | 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 |
| CN109140817A (en) * | 2018-11-02 | 2019-01-04 | 西安交通大学 | A kind of air conditioner and its control method using heating device |
| CN109163471A (en) * | 2018-07-18 | 2019-01-08 | 嘉兴学院 | Energy-saving comfortable air conditioner with separate hot pump system and its control method |
| CN109708284A (en) * | 2019-02-22 | 2019-05-03 | 广东欧科空调制冷有限公司 | Gas-liquid separator liquid level controlling method, device and air conditioner after a kind of defrosting |
| CN109990517A (en) * | 2019-04-15 | 2019-07-09 | 宁波工程学院 | Air conditioner intelligence quickly defrosting and protection control method |
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| 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 |
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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 |
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Cited By (11)
| 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 |
| CN106767079A (en) * | 2017-01-10 | 2017-05-31 | 美的集团武汉制冷设备有限公司 | Accumulation of heat component and air-conditioner |
| WO2018129839A1 (en) * | 2017-01-10 | 2018-07-19 | 美的集团武汉制冷设备有限公司 | Heat storage assembly 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 |
| CN109163471A (en) * | 2018-07-18 | 2019-01-08 | 嘉兴学院 | Energy-saving comfortable air conditioner with separate hot pump system and its control method |
| 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 |
| CN109140817A (en) * | 2018-11-02 | 2019-01-04 | 西安交通大学 | A kind of air conditioner and its control method using heating device |
| CN109140817B (en) * | 2018-11-02 | 2023-07-18 | 西安交通大学 | Air conditioner using heating device and control method thereof |
| CN109708284A (en) * | 2019-02-22 | 2019-05-03 | 广东欧科空调制冷有限公司 | Gas-liquid separator liquid level controlling method, device and air conditioner after a kind of defrosting |
| CN109990517A (en) * | 2019-04-15 | 2019-07-09 | 宁波工程学院 | Air conditioner intelligence quickly defrosting and protection control method |
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| CN104833152B (en) | 2017-08-08 |
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