EP0934494B1 - A refrigeration circuit arrangement for a refrigeration system - Google Patents
A refrigeration circuit arrangement for a refrigeration system Download PDFInfo
- Publication number
- EP0934494B1 EP0934494B1 EP98944909A EP98944909A EP0934494B1 EP 0934494 B1 EP0934494 B1 EP 0934494B1 EP 98944909 A EP98944909 A EP 98944909A EP 98944909 A EP98944909 A EP 98944909A EP 0934494 B1 EP0934494 B1 EP 0934494B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- evaporator
- refrigerant fluid
- valve
- circuit arrangement
- refrigeration circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
- F25B41/335—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant via diaphragms
Definitions
- the condensation pressure is that necessary to achieve the transformation of the refrigerant fluid to a gaseous form in the condenser 4 and the suction pressure is that obtained by operation of the compressor.
- the valve body 21 defines, internally, a chamber 27 for the passage of refrigerant fluid and communicating with the condensed fluid outlet 5 of the condenser 4 through the valve seat 24 and, continuously, with the condensed fluid inlet 9 of the evaporator 8, through the opening 23.
- the spring element 26 is in the form of a diaphragm defining a wall of the chamber 27 for the passage of refrigerant fluid opposite to the valve seat 24.
- the spring element 26 is mounted in the valve body 21, so as to constantly force the sealing means 25 to the closing condition of the refrigerant fluid passage 22.
- the spring element 26 has a sealing position, which is obtained when the hermetic compressor 1 is turned off, and a plurality of fluid passage positions, which are obtained by the elastic deformation of the spring element 26 when suction occurs in the chamber 27 for the passage of refrigerant fluid.
Abstract
Description
Claims (10)
- A refrigeration circuit arrangement for a refrigeration system, including a hermetic compressor (1), a condenser (4) having an inlet connected to a discharge outlet of the compressor (1), and an outlet, an evaporator (8), having an inlet connected to the outlet of the condenser (4), and an outlet, and further including, between the outlet of the condenser (4) and the inlet of the evaporator (8), a valve (20) of refrigerant fluid flow control, provided with a refrigerant fluid passage (22), whose cross-section varies during the operation of the hermetic compressor (1), as a function of a force resulting from the condensation pressure upstream the valve (20) and the suction pressure downstream the valve (20), in a manner which is inversely proportional to the variation of the condensation temperature, in order to allow the condensed refrigerant fluid supplied to the evaporator (8) to have a temperature substantially corresponding to a nominal condensation temperature of the system, said refrigerant fluid passage (22) having its cross-section closed, completely interrupting the fluid communication between the condenser (4) and the evaporator (8), when the hermetic compressor (1) turns off.
- A refrigeration circuit arrangement, as in claim 1, wherein said valve (20) comprises a sealing means (25), which is operatively associated to the refrigerant fluid passage (22) and which is directly and simultaneously submitted to said condensation pressure and to said suction pressure, said sealing means (25) being displaced, as a function of the force resulting from said pressures, in order to allow said cross-section variation of the refrigerant fluid condensation temperature of the condensed refrigerant fluid.
- A refrigeration circuit arrangement, as in claim 2, wherein the refrigerant fluid passage (22) is defined by an annular space formed between a valve seat (24) and the sealing means (25).
- A refrigeration circuit arrangement, as in claim 3, wherein the valve (20) comprises a valve body (21) defining therein a chamber (27) for the passage of refrigerant fluid, communicating with the outlet of the condenser (4) through the valve seat (24) and being provided with an opening (23) in constant fluid communication with the inlet of the evaporator (8).
- A refrigeration circuit arrangement, as in claim 4, wherein the sealing means (25) comprises a sealing portion located upstream the valve seat (24) and an impelling portion located downstream the valve seat, said impelling portion being connected to the valve body (21) by a spring element (26) constantly forcing the sealing means (25) to the closing condition of the refrigerant fluid passage (22), said spring element (26) having a sealing position, which is achieved when the hermetic compressor (1) turns off, and at least a plurality of fluid passage positions, which are achieved by elastic deformation of the spring element (26) when there is suction in the chamber (27) for the passage of refrigerant fluid.
- A refrigeration circuit arrangement, as in claim 5, wherein the spring element (26) is in the form of a diaphragm defining a wall of said chamber (27) opposite to the valve seat (24).
- A refrigeration circuit arrangement, as in claim 6, wherein the spring element (26) is placed inside the valve body (21), in order to divide the latter in the chamber (27) for the passage of refrigerant fluid and in a hermetic chamber (28) containing a fluid which is sensitive to temperature variation of the evaporator (8).
- A refrigeration circuit arrangement, as in claim 7, wherein the thermically sensitive fluid acts in the spring element (26), in order to force the latter towards the sealing position, when the temperature of the evaporator (8) decreases, and to conduct the spring element (26) to each fluid passage position, when the temperature of the evaporator (8) increases.
- A refrigeration circuit arrangement, as in claim 7, wherein the valve body (21) is hermetic and provided in the evaporator (8) adjacently to the condensed fluid inlet thereof.
- A refrigeration circuit arrangement, as in claim 9, wherein the impelling portion of the sealing means (25) is adjustably connected to the spring element (26).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9702803A BR9702803A (en) | 1997-08-28 | 1997-08-28 | Cooling system arrangement for cooling system |
BR9702803 | 1997-08-28 | ||
PCT/BR1998/000067 WO1999011987A1 (en) | 1997-08-28 | 1998-08-28 | A refrigeration circuit arrangement for a refrigeration system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0934494A1 EP0934494A1 (en) | 1999-08-11 |
EP0934494B1 true EP0934494B1 (en) | 2003-10-22 |
Family
ID=4067303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98944909A Expired - Lifetime EP0934494B1 (en) | 1997-08-28 | 1998-08-28 | A refrigeration circuit arrangement for a refrigeration system |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0934494B1 (en) |
JP (1) | JP2001505296A (en) |
KR (1) | KR20000068849A (en) |
CN (1) | CN1237240A (en) |
AT (1) | ATE252714T1 (en) |
BR (1) | BR9702803A (en) |
DE (1) | DE69819127D1 (en) |
WO (1) | WO1999011987A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7895003B2 (en) | 2007-10-05 | 2011-02-22 | Emerson Climate Technologies, Inc. | Vibration protection in a variable speed compressor |
US8418483B2 (en) | 2007-10-08 | 2013-04-16 | Emerson Climate Technologies, Inc. | System and method for calculating parameters for a refrigeration system with a variable speed compressor |
US8539786B2 (en) | 2007-10-08 | 2013-09-24 | Emerson Climate Technologies, Inc. | System and method for monitoring overheat of a compressor |
US9541907B2 (en) | 2007-10-08 | 2017-01-10 | Emerson Climate Technologies, Inc. | System and method for calibrating parameters for a refrigeration system with a variable speed compressor |
US8459053B2 (en) | 2007-10-08 | 2013-06-11 | Emerson Climate Technologies, Inc. | Variable speed compressor protection system and method |
JP7349706B2 (en) * | 2019-07-04 | 2023-09-25 | 株式会社不二工機 | Power element and expansion valve using it |
US11206743B2 (en) | 2019-07-25 | 2021-12-21 | Emerson Climate Technolgies, Inc. | Electronics enclosure with heat-transfer element |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3320763A (en) * | 1965-11-19 | 1967-05-23 | Westinghouse Electric Corp | Controls for refrigeration systems |
US3638446A (en) * | 1969-06-27 | 1972-02-01 | Robert T Palmer | Low ambient control of subcooling control valve |
US5245836A (en) * | 1989-01-09 | 1993-09-21 | Sinvent As | Method and device for high side pressure regulation in transcritical vapor compression cycle |
US5201190A (en) * | 1992-02-24 | 1993-04-13 | White Consolidated Industries, Inc. | Refrigerator with subcooling flow control valve |
EP0762064A1 (en) * | 1995-09-08 | 1997-03-12 | Fritz Ing. Weider | Refrigerant flow control for a heat pump and method |
-
1997
- 1997-08-28 BR BR9702803A patent/BR9702803A/en not_active IP Right Cessation
-
1998
- 1998-08-28 KR KR1019997003702A patent/KR20000068849A/en not_active Application Discontinuation
- 1998-08-28 CN CN98801227A patent/CN1237240A/en active Pending
- 1998-08-28 AT AT98944909T patent/ATE252714T1/en not_active IP Right Cessation
- 1998-08-28 WO PCT/BR1998/000067 patent/WO1999011987A1/en not_active Application Discontinuation
- 1998-08-28 EP EP98944909A patent/EP0934494B1/en not_active Expired - Lifetime
- 1998-08-28 DE DE69819127T patent/DE69819127D1/en not_active Expired - Lifetime
- 1998-08-28 JP JP51606499A patent/JP2001505296A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO1999011987A1 (en) | 1999-03-11 |
ATE252714T1 (en) | 2003-11-15 |
CN1237240A (en) | 1999-12-01 |
JP2001505296A (en) | 2001-04-17 |
KR20000068849A (en) | 2000-11-25 |
BR9702803A (en) | 1999-05-18 |
DE69819127D1 (en) | 2003-11-27 |
EP0934494A1 (en) | 1999-08-11 |
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