WO2002103265A1 - Refrigerateur - Google Patents
Refrigerateur Download PDFInfo
- Publication number
- WO2002103265A1 WO2002103265A1 PCT/JP2002/004866 JP0204866W WO02103265A1 WO 2002103265 A1 WO2002103265 A1 WO 2002103265A1 JP 0204866 W JP0204866 W JP 0204866W WO 02103265 A1 WO02103265 A1 WO 02103265A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- liquid
- heat exchanger
- receiver
- liquid level
- Prior art date
Links
Classifications
-
- 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
- F25B49/027—Condenser control arrangements
-
- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B2400/16—Receivers
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- 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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
-
- 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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/04—Refrigerant level
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to a separate type refrigeration apparatus, and more particularly, to a method for determining the amount of refrigerant to be charged at the time of local refrigerant charging in a separate type refrigeration apparatus.
- the refrigerating apparatus includes a refrigerant circuit in which a compressor, a heat source side heat exchanger, a receiver, an expansion valve, a liquid pipe, a use side heat exchanger, and a gas pipe are connected, and a liquid level detecting means.
- the compressor compresses the gas refrigerant.
- the receiver stores the liquid refrigerant.
- the liquid pipe connects the receiver and the expansion valve.
- the gas pipe connects the user-side heat exchanger and the compressor.
- the liquid level detecting means detects that the liquid level in the receiver has reached a predetermined position.
- the liquid level detecting means since the liquid level detecting means is provided, the refrigerant is charged into the refrigerant circuit. In this case, it is possible to detect that the liquid level in the receiver has reached a predetermined position during the refrigerant charging operation.
- the liquid level detecting means includes a bypass circuit and a temperature detecting means.
- the bypass means connects the receiver to the suction side of the compressor, and includes an on-off valve and a pressure reducing mechanism.
- the temperature detecting means detects the temperature of the refrigerant flowing through the bypass circuit.
- the liquid level detecting means is constituted by the bypass circuit including the on-off valve and the pressure reducing mechanism, and the temperature detecting means, so that the liquid level can be detected reliably at low cost.
- the refrigerant circuit is filled with the refrigerant while displaying a refrigerant charging operation state in which the liquid pipe of the refrigerant circuit is filled with the liquid refrigerant having a predetermined density.
- the apparatus further includes refrigerant filling operation control means, and refrigerant filling end means for ending refrigerant filling by the refrigerant filling operation control means based on a detection signal from the liquid level detecting means.
- the refrigerant circuit is filled with the refrigerant while displaying the refrigerant charging operation state in which the inside of the refrigerant circuit is filled with the liquid refrigerant having the predetermined density. Refrigerant charging is terminated when the predetermined liquid level is detected, so that the reliability of the refrigerant charging operation is improved.
- the heat source side heat exchanger is an air-cooled heat exchanger that uses air supplied by an outdoor fan as a heat source.
- the refrigerant charging operation control means controls the outdoor fan so that the condensation pressure of the heat source side heat exchanger operating as a condenser becomes a predetermined value, and controls the refrigerant at the outlet of the utilization side heat exchanger operating as an evaporator.
- the opening of the expansion valve is controlled so that a predetermined degree of superheat can be imparted.
- FIG. 1 (a) is a block circuit diagram showing a refrigeration cycle of a refrigeration apparatus according to an embodiment of the present invention.
- FIG. 2 is an enlarged view showing a main part of the refrigeration apparatus according to the embodiment of the present invention.
- FIG. 3 is an enlarged view showing a main part of a refrigeration apparatus according to another embodiment of the present invention.
- This separate type refrigeration apparatus is, as shown in FIG.
- It has a refrigeration cycle A (refrigerant circuit) that communicates with 8 and gas piping 9.
- the liquid piping 8 and the gas piping 9 have a local piping part Z.
- Reference numeral 7 is an indoor fan.
- the receiver 3 is provided with a liquid level detecting means 10 for detecting that the liquid level L in the receiver 3 has reached a predetermined position L 0.
- the liquid level detecting means 10 connects the predetermined position L 0 in the receiver 3 to the suction pipe 11 of the compressor 1 and opens and closes when the liquid level is detected.
- a bypass circuit 14 having a valve 12 and a capillary tube 13 acting as a pressure reducing mechanism, and a thermistor 15 acting as temperature detecting means for detecting the temperature of the refrigerant flowing through the bypass circuit 14 ing.
- the predetermined position L 0 is a liquid level of the liquid refrigerant that is accumulated in the receiver 3 when the refrigerant is most unnecessary during the cooling operation (in other words, when the refrigerant circulation amount is the minimum).
- the liquid level L in the receiver 3 is When cooling is required most during operation (in other words, when the amount of circulating refrigerant is the maximum), it is set so that it does not become lower than the minimum position Lmin.
- Reference numeral 16 denotes a pressure sensor for detecting a suction pressure.
- the refrigeration cycle A is supplied with detection signals from the heat sink 15 and the pressure sensor 16, and the compressor 1, the expansion valve 4, the outdoor fan 6, the indoor fan 7, and the A controller 18 for outputting a control signal to the solenoid on-off valve 12 is additionally provided.
- the controller 18 has a function as a refrigerant charging operation control unit that performs refrigerant charging to the refrigeration cycle A while showing a refrigerant charging operation state in which the liquid pipe 8 is filled with a liquid refrigerant having a predetermined density. It has a function as a refrigerant charging end unit that ends refrigerant charging by the refrigerant charging operation control unit based on a detection signal from the liquid level detection unit 10.
- the refrigerant charging operation control means sets the condensing pressure in the condenser 2 to a predetermined value (that is, a state in which more than necessary liquid refrigerant is not stored in the condenser 2).
- the outdoor fan 6 is controlled as described above and the refrigerant at the outlet of the evaporator 5 can be given a predetermined degree of superheat (that is, the gas pipe 9 from the evaporator 5 to the compressor 1 has gas inside.
- the opening of the expansion valve 4 is controlled so that the refrigerant is filled with the refrigerant.
- the refrigerant is charged through a shut-off valve (not shown) connecting the outdoor unit X and the on-site connection pipe Z.
- the outdoor fan 6 is controlled by a control signal from the controller 18 so that the condensing pressure in the condenser 2 becomes a predetermined value (that is, a state in which more liquid refrigerant than necessary is stored in the condenser 2). So that the refrigerant at the outlet of the evaporator 5 can be given a predetermined degree of superheat (that is, the gas pipe 9 from the evaporator 5 to the compressor 1 is filled with the gas refrigerant).
- the refrigerant is charged into the refrigeration cycle A while the liquid pipe 8 shows a refrigerant charging operation state in which the liquid pipe 8 is filled with a liquid refrigerant having a predetermined density.
- the solenoid on-off valve 12 is opened.
- the refrigerant circulation amount in the refrigeration cycle A gradually increases, and the refrigerant in the receiver 3
- the liquid level L rises.
- the saturated liquid refrigerant flows into the bypass circuit 14.
- a saturated gas refrigerant that fills the gas phase of the receiver 3 flows through the bypass circuit 14, and the thermistor 15 detects the temperature of this gas refrigerant.
- the saturated liquid refrigerant flowing into the no-pass circuit 14 is decompressed by the capillary tube 13 and evaporates, so that the detection temperature of the thermistor 15 drops rapidly. Therefore, by detecting this rapid temperature drop, the liquid level can be detected.
- the charging of the refrigerant is completed.
- the required refrigerant charging amount in the refrigeration cycle A can be obtained, and even when the length of the on-site communication pipe cannot be measured, the required refrigerant charging amount can be easily obtained and the equipment can be obtained. Reliability is also improved.
- the outdoor fan 6 is controlled so that the condensing pressure in the condenser 2 becomes a predetermined value (that is, a state in which more than necessary liquid refrigerant is not accumulated in the condenser 2), and the outlet fan of the evaporator 5 is controlled.
- the opening degree of the expansion valve 4 is controlled so that the refrigerant can be given a predetermined degree of superheat (that is, the gas pipe 9 from the evaporator 5 to the compressor 1 is filled with the gas refrigerant).
- the capacity of the receiver 3 is the refrigerant filling amount determined when the liquid level L is the lowest in the cooling cycle (that is, when the condensing pressure is high and the liquid refrigerant density in the liquid pipe 8 is high), and the excess refrigerant is the most. It is important to select so that it does not overflow from the receiver 3 under the operating conditions that prevent the deterioration of the COP.
- an upper end Lmax of a receiver 3 is connected to a suction pipe 11 of a compressor 1, and an electromagnetic on-off valve 20 and a capillary tube 21 are provided.
- a bypass circuit 19 is provided to act as a protective device during defrost operation.However, if the thermistor 22 is attached to the bypass circuit 19, it is possible to detect refrigerant overcharge. it can. In other words, at the time of test operation after charging the refrigerant, the liquid level L of the liquid-cooled butterfly in the receiver 3 is maximized by the thermistor 22. It is possible to detect that the liquid level has reached Lmax. At this time, a liquid level sensor is employed as the liquid level detecting means 10 described above.
- a cooling only machine has been described.However, a four-way switching valve is provided on the discharge side of the compressor 1 in the outdoor unit X so that a cooling and heating system capable of reversibly circulating the refrigerant through the refrigeration cycle A is possible. aVAILABILITY c industry is also present invention Do refrigeration system is applicable
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/333,055 US6845626B2 (en) | 2001-05-22 | 2002-05-20 | Refrigeration apparatus |
EP02780781A EP1389723B1 (en) | 2001-05-22 | 2002-05-20 | Refrigerator |
AU2002309020A AU2002309020B2 (en) | 2001-05-22 | 2002-05-20 | Refrigerator |
DE60218653T DE60218653T2 (de) | 2001-05-22 | 2002-05-20 | Kältegerät |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001152091A JP2002350014A (ja) | 2001-05-22 | 2001-05-22 | 冷凍装置 |
JP2001-152091 | 2001-05-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002103265A1 true WO2002103265A1 (fr) | 2002-12-27 |
Family
ID=18996821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/004866 WO2002103265A1 (fr) | 2001-05-22 | 2002-05-20 | Refrigerateur |
Country Status (8)
Country | Link |
---|---|
US (1) | US6845626B2 (ja) |
EP (2) | EP1736721B1 (ja) |
JP (1) | JP2002350014A (ja) |
CN (1) | CN1181303C (ja) |
AU (1) | AU2002309020B2 (ja) |
DE (2) | DE60218653T2 (ja) |
ES (2) | ES2358041T3 (ja) |
WO (1) | WO2002103265A1 (ja) |
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- 2001-05-22 JP JP2001152091A patent/JP2002350014A/ja active Pending
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2002
- 2002-05-20 EP EP06017966A patent/EP1736721B1/en not_active Expired - Fee Related
- 2002-05-20 DE DE60218653T patent/DE60218653T2/de not_active Expired - Lifetime
- 2002-05-20 ES ES06017966T patent/ES2358041T3/es not_active Expired - Lifetime
- 2002-05-20 AU AU2002309020A patent/AU2002309020B2/en not_active Ceased
- 2002-05-20 WO PCT/JP2002/004866 patent/WO2002103265A1/ja active IP Right Grant
- 2002-05-20 DE DE60238795T patent/DE60238795D1/de not_active Expired - Lifetime
- 2002-05-20 ES ES02780781T patent/ES2282485T3/es not_active Expired - Lifetime
- 2002-05-20 EP EP02780781A patent/EP1389723B1/en not_active Expired - Fee Related
- 2002-05-20 CN CNB028017293A patent/CN1181303C/zh not_active Expired - Fee Related
- 2002-05-20 US US10/333,055 patent/US6845626B2/en not_active Expired - Lifetime
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JPS5977275A (ja) * | 1982-09-23 | 1984-05-02 | リチヤ−ド・ジヨン・アベリイ・ジユニア | 蒸気圧縮冷凍機の冷媒アキユムレ−タ・供給装置と冷媒量決定方法および冷媒供給方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113932503A (zh) * | 2021-11-24 | 2022-01-14 | 宁波奥克斯电气股份有限公司 | 一种制冷剂充注装置及控制方法 |
CN113932503B (zh) * | 2021-11-24 | 2023-04-07 | 宁波奥克斯电气股份有限公司 | 一种制冷剂充注装置及控制方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2002350014A (ja) | 2002-12-04 |
EP1389723B1 (en) | 2007-03-07 |
CN1181303C (zh) | 2004-12-22 |
ES2282485T3 (es) | 2007-10-16 |
DE60218653T2 (de) | 2007-11-22 |
EP1736721A2 (en) | 2006-12-27 |
DE60238795D1 (de) | 2011-02-10 |
EP1736721A3 (en) | 2007-03-14 |
CN1463351A (zh) | 2003-12-24 |
AU2002309020B2 (en) | 2004-07-15 |
DE60218653D1 (de) | 2007-04-19 |
ES2358041T3 (es) | 2011-05-05 |
US20030172665A1 (en) | 2003-09-18 |
EP1389723A4 (en) | 2005-12-14 |
US6845626B2 (en) | 2005-01-25 |
EP1736721B1 (en) | 2010-12-29 |
EP1389723A1 (en) | 2004-02-18 |
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