CN103673138B - Air-conditioner and control method thereof - Google Patents

Air-conditioner and control method thereof Download PDF

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Publication number
CN103673138B
CN103673138B CN201310741091.XA CN201310741091A CN103673138B CN 103673138 B CN103673138 B CN 103673138B CN 201310741091 A CN201310741091 A CN 201310741091A CN 103673138 B CN103673138 B CN 103673138B
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pipeline
conditioner
air
defrost
regulation
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CN103673138A (en
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吴静龙
王洪
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TCL Air Conditioner Zhongshan Co Ltd
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TCL Air Conditioner Zhongshan Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The present invention relates to a kind of air-conditioner and control method thereof, air-conditioner includes off-premises station, indoor set, cross valve, compressor and the gas-liquid separator connected by connecting tube, the exhaustor of compressor is connected with the first valve port of described cross valve, the muffler of compressor is connected with the port of export of gas-liquid separator, also include the first loop, second servo loop and tertiary circuit, the present invention can improve the air-conditioner defrost efficiency at cold district, improves degree of supercooling and the stability of household air-conditioner of air-conditioning refrigerant.

Description

Air-conditioner and control method thereof
Technical field
The present invention relates to air-conditioning technical field, particularly relate to air-conditioner and the control thereof of a kind of cold district defrost Method processed.
Background technology
At present, air-conditioner has become in human lives the capital equipment improving indoor environment.At cold district, Owing to off-premises station is exposed in outdoor environment, air-conditioner in a heating mode, due to the structure side of off-premises station The reasons such as the fan airstream distribution of formula and off-premises station, in the case of off-premises station heat radiation is undesirable, outdoor ring The low temperature in border the most easily makes bottom and the chassis portion frosting of the finned heat exchanger in off-premises station or is frozen Live, and the overall performance of air-conditioner will be greatly reduced, such as air-conditioning in off-premises station frosting or when being frozen in The drainability of device weakens, heating load greatly reduces etc., and some air-conditioners provided in prior art exist Defrosting method when cold district uses, as increased pipeline between the heat exchanger and compressor of off-premises station, But the defrost time is longer and defrost is the most thorough etc., and defrost efficiency is the most not high enough, affects to a great extent The comfort level of user.
As it is shown in figure 1, the defrosting system of traditional air-conditioner includes: off-premises station 10, indoor set 20, four Logical valve 30, compressor 60 and gas-liquid separator 70.Wherein, the muffler 602 of compressor 60 and gas-liquid The port of export of separator 70 connects, four valve ports of cross valve 30 respectively with the exhaustor of compressor 60 601, the arrival end of off-premises station 10, indoor set 20 and gas-liquid separator 70 connects.In cooling mode, Compressor 60 becomes after the refrigerant compression of the gas-liquid mixed of low-temp low-pressure out from indoor set 20 The gas refrigerant of High Temperature High Pressure, the gas refrigerant of High Temperature High Pressure enters off-premises station 10, at off-premises station 10 Heat exchanger be cooled to the cold-producing medium of the middle temperature of high pressure, the refrigerant temperature of the middle temperature of high pressure is the highest, and Outdoor temperature is relatively low, and therefore, the degree of supercooling of the cold-producing medium of the middle temperature of high pressure is relatively low, the air-conditioning when variable working condition Device is unstable.
Summary of the invention
Present invention is primarily targeted at a kind of air-conditioner of offer and control method thereof, it is intended to improve air-conditioner In the defrost efficiency of cold district, improve degree of supercooling and the stability of household air-conditioner of air-conditioning refrigerant.
In order to achieve the above object, the present invention proposes a kind of air-conditioner, including the outdoor connected by connecting tube Machine, indoor set, cross valve, compressor and gas-liquid separator, the exhaustor of described compressor and described four First valve port of logical valve connects, and the muffler of described compressor is connected with the port of export of described gas-liquid separator, Also include the first loop, second servo loop and tertiary circuit;
The second valve port of described cross valve that described first loop includes being sequentially connected with, indoor set, defrost pipe Road, the first regulation pipeline, off-premises station, the 3rd valve port of cross valve, the 4th valve port and gas-liquid of cross valve The arrival end of separator, described defrost pipeline is installed on the chassis of described off-premises station;Described second servo loop Including the 3rd valve port of the described cross valve being sequentially connected with, off-premises station, the first regulation pipeline, the second regulation Pipeline and the arrival end of gas-liquid separator, described first regulation pipeline is installed on the heat exchanger of described off-premises station Lower end;And, described tertiary circuit includes the 3rd valve port of described cross valve, the outdoor being sequentially connected with Machine, first regulation pipeline, defrost pipeline, indoor set, the second valve port of cross valve, the 3rd of cross valve the Valve port and the arrival end of gas-liquid separator.
Preferably, described defrost pipeline includes anti-freezing stream unit and the sub-pipeline of defrost being connected, described The sub-pipeline of defrost is installed on the chassis of described off-premises station and connects described indoor set, described antifreeze restriction Part one end is connected between described second regulation pipeline and the first regulation pipeline, and the other end is managed by defrost Road is connected with indoor set.
Preferably, described second regulation pipeline includes regulation throttle part and the dividing potential drop parts being connected, institute State regulation throttle part to be connected with the arrival end of described gas-liquid separator, described dividing potential drop parts and described first Regulation pipeline and described anti-freezing stream unit connect.
Preferably, described anti-freezing stream unit is electric expansion valve, and described regulation throttle part is capillary tube, Described dividing potential drop parts are electromagnetic valve.
Preferably, the cold-producing medium percent of pass of described capillary tube controls is 20%.
Preferably, described first regulation pipeline and the sub-pipeline of described defrost are U-tube or coil.
The present invention also provides for the control method of a kind of air-conditioner, and described air-conditioner is aforesaid air-conditioner, institute State control method to include:
When described air conditioner heat-production and when entering defrost pattern, control cold-producing medium and flow through described first loop;
When described air-conditioner freezes and enters defrost pattern, control cold-producing medium flow through described second servo loop and Tertiary circuit.
Preferably, described control cold-producing medium flows through the step in described first loop and includes:
Described first loop is flowed through by closing the dividing potential drop component controls cold-producing medium of described second regulation pipeline.
Preferably, the step that described control cold-producing medium flows through described second servo loop and tertiary circuit includes:
By open described second regulation pipeline dividing potential drop component controls cold-producing medium flow through described second servo loop and Tertiary circuit.
A kind of air-conditioner of present invention proposition and control method thereof, by pacifying below the heat exchanger of indoor set Fill the first regulation pipeline, the second regulation pipeline and defrost pipeline, the first regulation pipeline, the second regulation pipeline Being connected between arrival end and the off-premises station of gas-liquid separator, one end of defrost pipeline is connected to the second regulation Pipeline and first regulation pipeline between, the other end is connected to indoor set, carry out in a heating mode antifreeze or During defrost, defrost pipeline cold-producing medium from gaseous state become during liquid cushioning effect, thus improve The degree of supercooling of air-conditioner, owing to the sub-pipeline of the defrost of defrost pipeline is installed on chassis, is conducive to heating Utilizing waste heat that fin and the chassis of outdoor unit heat exchanger are carried out antifreeze or defrost under pattern, the defrost time can Shortening 25%, defrost more thoroughly, improve the comfort level of user;Time in cooling mode, the first regulation pipe Road cold-producing medium from gaseous state become during liquid cushioning effect, thus improve the degree of supercooling of air-conditioner, Improve the stability that air-conditioner runs when variable working condition.
Accompanying drawing explanation
Fig. 1 is the structural representation of the air-conditioner of prior art;
Fig. 2 is the structural representation of air-conditioner preferred embodiment of the present invention;
Fig. 3 is that in air-conditioner shown in Fig. 2, the first regulation pipeline and the sub-pipeline of defrost are arranged in off-premises station Structural representation;
Fig. 4 is the refrigerant cycle schematic diagram in cooling mode of air-conditioner shown in Fig. 2;
Fig. 5 is the first regulation pipeline and structural representation of the sub-pipeline of defrost shown in Fig. 4.
In order to the technical scheme making invention is clearer, understand, be described in further detail below in conjunction with accompanying drawing.
Detailed description of the invention
Specifically, refer to shown in Fig. 2 and Fig. 3, one embodiment of the invention proposes a kind of air-conditioner, bag Include off-premises station 1, indoor set 2, cross valve 3, compressor 6 and the gas-liquid separator connected by connecting tube 7.The exhaustor 61 of compressor 6 is connected with the first valve port 31 of cross valve 3, the muffler of compressor 6 62 are connected with the port of export of gas-liquid separator 7, and air-conditioner also includes the first loop, second servo loop and the 3rd Loop.Wherein, the first loop includes being sequentially connected with the second valve port 32 of cross valve 3, indoor set 2, Defrost pipeline 9, first regulates pipeline 8, off-premises station 1, the 3rd valve port 33 of cross valve 3, cross valve 3 The 4th valve port 34 and the arrival end of gas-liquid separator 7, as it is shown on figure 3, defrost pipeline 9 is installed on room On the chassis 12 of outer machine 1;Second servo loop includes the 3rd valve port 33 of cross valve 3, the room being sequentially connected with Outer machine 1, first regulates pipeline 8, second and regulates pipeline 10 and the arrival end of gas-liquid separator 7, such as figure Shown in 3, the first regulation pipeline 8 is installed on the lower end of the heat exchanger 11 of off-premises station 1;And, the 3rd time Road includes that the 3rd valve port 33 of cross valve 3 being sequentially connected with, off-premises station 1, first regulate pipeline 8, change Frost pipeline 9, indoor set 2, the second valve port 32 of cross valve 3, the 3rd valve port 33 and gas of cross valve 3 The arrival end of liquid/gas separator 7.
Owing to air-conditioner is when cold district uses, outdoor environment temperature is relatively low easily to be made in off-premises station 1 Associated components frosting or freeze.When air-conditioner carries out antifreeze or defrost in a heating mode, in Fig. 2 Arrow represents the flow direction of cold-producing medium, and compressor 6 will become after the refrigerant compression of the gas-liquid mixed of low-temp low-pressure For the gas refrigerant of High Temperature High Pressure, the gas refrigerant of High Temperature High Pressure the second valve port by cross valve 3 After 32 enter indoor set 2, being cooled to the cold-producing medium of the middle temperature of high pressure, now high pressure middle temperature cold-producing medium passes through Defrost pipeline 9, entered after off-premises station 1 again through the 3rd valve port of cross valve 3 by the first regulation pipeline 8 33 and the 4th valve port 34 return to gas-liquid separator 7.The refrigerant temperature of the middle temperature of high pressure is the highest, and room Outer temperature is relatively low, and chassis 12 is near the lower end of the heat exchanger 11 of off-premises station 1, therefore, it can profit Carry out with the fin bottom the cold-producing medium heat exchanger 11 of the middle temperature of the high pressure in defrost pipeline 9 and chassis 12 Antifreeze or defrost, therefore the fin of chassis 12 and heat exchanger 11 will not dew also will not frosting or knot Ice, makes condensed water discharge smoothly, it is ensured that the performance of air-conditioner.Refrigerant temperature after defrost pipeline 9 Reduce further.Defrost pipeline 9 cold-producing medium from gaseous state become during liquid cushioning effect, from And improve the degree of supercooling of air conditioner refrigerant, be conducive to carrying out antifreeze or defrost, defrost in a heating mode Time can shorten, defrost more thoroughly, improve the comfort level of user.
Incorporated by reference to reference to Fig. 4, when air-conditioner in cooling mode time, the arrow in Fig. 4 represents cold-producing medium The flow direction, compressor 6 is by the refrigerant compression of the gas-liquid mixed of low-temp low-pressure out from indoor set 2 After become the gas refrigerant of High Temperature High Pressure, the gas refrigerant of High Temperature High Pressure is through the 3rd valve of cross valve 3 Mouthfuls 33 laggard enter off-premises station 1, off-premises station 1 is cooled to the cold-producing medium of high pressure middle temperature gas-liquid mixed, After the cold-producing medium of high pressure middle temperature gas-liquid mixed enters the first regulation pipeline 8, some refrigerant is by entering the Two regulation pipelines 10 return to gas-liquid separator 7.Due to high pressure middle temperature gas-liquid mixed refrigerant temperature also than Higher, and the temperature of outdoor is relatively low, and the first regulation pipeline 8 is arranged on the heat exchanger 11 of off-premises station 1 Lower section, therefore, through first regulation pipeline 8 after refrigerant temperature reduce further, become in high pressure The liquid refrigerant of temperature.First regulation pipeline 8 cold-producing medium from gaseous state become during liquid buffering Effect, thus improve the degree of supercooling of air conditioner refrigerant, improve the stability of air-conditioner, improve user's Comfort level.
Wherein, when air-conditioner in cooling mode time, through first regulation pipeline 8 after cold-producing medium major part Enter defrost pipeline 9, and after indoor set 2 and the second valve port 32 of cross valve 3 and the 4th valve port 34 Return to gas-liquid separator 7.
Wherein, the second regulation pipeline 10 is opened the most in cooling mode.Second regulation pipeline 10 one end with The arrival end of gas-liquid separator 7 connects, and the other end is connected with off-premises station 1 by the first regulation pipeline 8. The first regulation pipeline 8 in the present embodiment is installed on the lower end of the heat exchanger 11 of off-premises station 1, adjusts through first Cold-producing medium small part behind pipe joint road 8 flows to the second regulation pipeline 10, and cold-producing medium now is also the most all Liquefaction, still has higher pressure, and therefore the second regulation pipeline 10 carries out dividing potential drop to reduce pressure to cold-producing medium Power, and throttle further, make cold-producing medium almost all liquefy, return in gas-liquid separator 7, the One regulation pipeline 8 coordinates the dividing potential drop of the second regulation pipeline 10 and throttling action can improve air-conditioner further The degree of supercooling of cold-producing medium.
Incorporated by reference to reference to Fig. 3 and Fig. 4, in a preferred embodiment, defrost pipeline 9 includes being connected Anti-freezing stream unit 92 and the sub-pipeline of defrost 91, as shown in Figure 4, first regulation pipeline 8 is installed on The lower end of the heat exchanger 11 of off-premises station 1, the sub-pipeline of defrost 91 is installed on the chassis 12 of off-premises station 1. Anti-freezing stream unit 92 one end is connected between the second regulation pipeline 10 and the first regulation pipeline 8, another End is connected with indoor set 2 by the sub-pipeline of defrost 91.
Preferably, the second regulation pipeline 10 includes regulation throttle part 101 and the dividing potential drop parts being connected 102, regulation throttle part 101 be connected with the arrival end of gas-liquid separator 7, dividing potential drop parts 102 respectively with First regulation pipeline 8 and described anti-freezing stream unit 92 connect.
The sub-pipeline of defrost 91 in the present embodiment is installed on the chassis 12 of off-premises station 1, main heat exchanging End portion and the chassis 12 of device 11 carry out antifreeze or defrost, owing to the second regulation pipeline 10 is heating mould Being closed mode under formula, the refrigerant flow direction anti-freezing stream unit 92 after the sub-pipeline of defrost 91, through anti- Make cold-producing medium lower the temperature further after freezing throttle part 92 throttling, regulate pipeline 8, off-premises station through first successively 1 and the 3rd valve port 33 of cross valve 3 and the 4th valve port 34 after return in gas-liquid separator 7, defrost Pipeline 91 can improve the degree of supercooling of air conditioner refrigerant equally.
Preferably, above-mentioned anti-freezing stream unit 92 is electric expansion valve, and regulation throttle part 101 is capillary Pipe, dividing potential drop parts 102 are electromagnetic valve.Wherein, the operation principle of electromagnetic valve and capillary tube is: work as air-conditioning When device enters defrost pattern in cooling mode, electromagnetic valve powers on and opens, and some refrigerant is through electromagnetic valve And capillary tube, subsequently into gas-liquid separator 7, finally enter compressor 6.At the end of defrost, electromagnetism Valve power-off, stops cold-producing medium through electromagnetic valve and capillary tube;The scale lengths of capillary tube need to be touched through experiment End debugging goes to determine, to guarantee the accurate shunting of cold-producing medium.Wherein, the cold-producing medium percent of pass control of capillary tube System is optimal 20%.
Preferably, as it is shown in figure 5, the first regulation pipeline 8 and the sub-pipeline of defrost 91 are made up of U-tube, Or can also be made up of coil etc..
The present invention also proposes the control method of a kind of air-conditioner, and this air-conditioner is above-mentioned air-conditioner, including First loop, second servo loop and tertiary circuit, described control method includes:
When air conditioner heat-production and when entering defrost pattern, control cold-producing medium and flow through the first loop;
When air-conditioner freezes and enters defrost pattern, control cold-producing medium and flow through second servo loop and tertiary circuit.
Wherein, above-mentioned two step in no particular order, as long as air conditioner heat-production when entering defrost pattern, Control cold-producing medium and flow through the first loop;And when air-conditioner freezes and enters defrost pattern, control cold-producing medium stream Through second servo loop and tertiary circuit.
Wherein, control cold-producing medium to flow through the step in the first loop and include: by closing the second regulation pipeline Dividing potential drop component controls cold-producing medium flows through the first loop.Control cold-producing medium and flow through second servo loop and tertiary circuit Step includes: flow through second servo loop and the by opening the dividing potential drop component controls cold-producing medium of the second regulation pipeline Three loops.In the present embodiment, dividing potential drop parts can be electromagnetic valve, can close after power-off, after powering on i.e. Can open.
Compared with prior art, the air-conditioner of the present invention and control method thereof, by the heat exchange at indoor set First regulation pipeline, the second regulation pipeline and defrost pipeline it is installed, the first regulation pipeline, second below device Regulation pipeline is connected between arrival end and the off-premises station of gas-liquid separator, and one end of defrost pipeline is connected to Between second regulation pipeline and the first regulation pipeline, the other end is connected to indoor set, enters in a heating mode During antifreeze the or defrost of row, defrost pipeline cold-producing medium from gaseous state become during liquid cushioning effect, Thus improve the degree of supercooling of air-conditioner, owing to the sub-pipeline of the defrost of defrost pipeline is installed on chassis, favorably In utilizing waste heat that fin and the chassis of outdoor unit heat exchanger are carried out antifreeze or defrost in a heating mode, change The frost time can shorten 25%, defrost more thoroughly, improve the comfort level of user;Time in cooling mode, the One regulation pipeline cold-producing medium from gaseous state become during liquid cushioning effect, thus improve air-conditioner Degree of supercooling, improve when variable working condition air-conditioner run stability.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention Every equivalent structure utilizing description of the invention and accompanying drawing content to be made or flow process conversion, or directly or Connect and be used in other relevant technical field, be the most in like manner included in the scope of patent protection of the present invention.

Claims (9)

1. an air-conditioner, including the off-premises station connected by connecting tube, indoor set, cross valve, compressor And gas-liquid separator, the exhaustor of described compressor is connected with the first valve port of described cross valve, described pressure The muffler of contracting machine is connected with the port of export of described gas-liquid separator, it is characterised in that also include first time Road, second servo loop and tertiary circuit;
The second valve port of described cross valve that described first loop includes being sequentially connected with, indoor set, defrost pipe Road, the first regulation pipeline, off-premises station, the 3rd valve port of cross valve, the 4th valve port and gas-liquid of cross valve The arrival end of separator, described defrost pipeline is installed on the chassis of described off-premises station;Described second servo loop Including the 3rd valve port of the described cross valve being sequentially connected with, off-premises station, the first regulation pipeline, the second regulation Pipeline and the arrival end of gas-liquid separator, described first regulation pipeline is installed on the heat exchanger of described off-premises station Lower end;And, described tertiary circuit includes the 3rd valve port of described cross valve, the outdoor being sequentially connected with Machine, first regulation pipeline, defrost pipeline, indoor set, the second valve port of cross valve, the 3rd of cross valve the Valve port and the arrival end of gas-liquid separator.
Air-conditioner the most according to claim 1, it is characterised in that described defrost pipeline includes being connected The anti-freezing stream unit connect and the sub-pipeline of defrost, the sub-pipeline of described defrost is installed on the chassis of described off-premises station Going up and connect described indoor set, described anti-freezing stream unit one end is connected to described second regulation pipeline and the Between one regulation pipeline, the other end is connected with indoor set by the sub-pipeline of defrost.
Air-conditioner the most according to claim 2, it is characterised in that described second regulation pipeline includes The regulation throttle part being connected and dividing potential drop parts, described regulation throttle part and described gas-liquid separator Arrival end connects, and described dividing potential drop parts are connected with described first regulation pipeline and described anti-freezing stream unit.
Air-conditioner the most according to claim 3, it is characterised in that described anti-freezing stream unit is electricity Sub-expansion valve, described regulation throttle part is capillary tube, and described dividing potential drop parts are electromagnetic valve.
Air-conditioner the most according to claim 4, it is characterised in that the cold-producing medium of described capillary tube leads to Rate of crossing controls to be 20%.
Air-conditioner the most according to claim 2, it is characterised in that described first regulation pipeline and institute Stating the sub-pipeline of defrost is U-tube or coil.
7. the control method of an air-conditioner, it is characterised in that described air-conditioner is aforementioned claim 1 Described air-conditioner, described control method includes:
When described air conditioner heat-production and when entering defrost pattern, control cold-producing medium and flow through described first loop;
When described air-conditioner freezes, control cold-producing medium and flow through described second servo loop and tertiary circuit.
Control method the most according to claim 7, it is characterised in that described control cold-producing medium flows through The step in described first loop includes:
Described first loop is flowed through by closing the dividing potential drop component controls cold-producing medium of described second regulation pipeline.
Control method the most according to claim 7, it is characterised in that described control cold-producing medium flows through The step of described second servo loop and tertiary circuit includes:
By open described second regulation pipeline dividing potential drop component controls cold-producing medium flow through described second servo loop and Tertiary circuit.
CN201310741091.XA 2013-12-27 2013-12-27 Air-conditioner and control method thereof Active CN103673138B (en)

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CN105202724B (en) * 2015-10-21 2018-11-16 Tcl空调器(中山)有限公司 Air-conditioner control method, air conditioner controlling device and air conditioner
CN106766384A (en) * 2017-03-31 2017-05-31 中国环境科学研究院 A kind of low-temperature air source heat pump devices and methods therefor of achievable steam conversion
CN107101275A (en) * 2017-06-01 2017-08-29 青岛海尔空调器有限总公司 A kind of air conditioner and its control method
CN111197819B (en) * 2018-11-16 2021-08-17 奥克斯空调股份有限公司 Air conditioner outdoor unit, air conditioner and control method of air conditioner
CN110567099A (en) * 2019-09-23 2019-12-13 宁波奥克斯电气股份有限公司 Method and device for preventing outdoor unit of multi-connected air conditioner from freezing and air conditioner
CN110926051A (en) * 2019-11-21 2020-03-27 广东美的暖通设备有限公司 Outdoor heat exchanger assembly, air conditioning system and defrosting method thereof
CN112856718A (en) * 2019-11-28 2021-05-28 广东美的制冷设备有限公司 Air conditioner, control method thereof and storage medium

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