US3699778A - Thermal expansion valve with rapid pressure equalizer - Google Patents

Thermal expansion valve with rapid pressure equalizer Download PDF

Info

Publication number: US3699778A
Authority: US; United States
Prior art keywords: valve; diaphragm; pass; pressure; outlet
Prior art date: 1971-03-29
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

Application number

US128977A

Other languages

English (en)

Inventor

Charles D Orth

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Eaton Corp

Original Assignee

Controls Company of America

Priority date (The priority date 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 date listed.)

1971-03-29

Filing date

1971-03-29

Publication date

1972-10-24

1971-03-29 Application filed by Controls Company of America filed Critical Controls Company of America

1972-10-24 Application granted granted Critical

1972-10-24 Publication of US3699778A publication Critical patent/US3699778A/en

1986-01-17 Assigned to CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. reassignment CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE, SCHILLER PARK, IL., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SINGER COMPANY, THE

1986-10-08 Assigned to EATON CORPORATION, A CORP. OF OH. reassignment EATON CORPORATION, A CORP. OF OH. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CONTROLS COMPANY OF AMERICA

1989-10-24 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

239000003507 refrigerant Substances 0.000 abstract 1
238000005057 refrigeration Methods 0.000 description 6
238000013459 approach Methods 0.000 description 3
230000000630 rising effect Effects 0.000 description 1

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
- F16K17/19—Equalising valves predominantly for tanks
- 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

a flanged collar which guides the valve interposed the push pins and the by-pass port.
This invention relates to refrigeration systems having means for rapid equalization of the pressure in the high and low pressure sides of the system.
thermostatic expansion valves In order to reduce the starting torque for a compressor in a refrigeration system, it is necessary to equalize the pressure between the suction and discharge side of the compressor after it has been stopped.
this pressure equalization has been accomplished by one of two approaches.
the thermostatic expansion valve In one approach the thermostatic expansion valve is provided with a built-in bleed. The maximum size, and hence flow rate, of this bleed is limited by the minimum flow rate required during the operating cycle of the system.
the bleed is usually limited to a rate substantially below that of the nominal capacity of the expansion valve. This limited bleed rate requires the system to be shut down for a considerable length of time to allow the pressures in the system to equalize. In some applications, time delay devices are employed to keep the system shut down until equalization is accomplished.
thermostatic expansion valve described in the abstract provides a by-pass system which is capable of providing rapid system pressure equalization, but is less complex and has fewer parts, and therefore, the overall cost of the valve is reduced.
FIG. 1 is a cross sectional view of an expansion valve, shown installed in a schematic representation of a refrigeration system, showing the internal by-pass in the closed position during normal operation.
FIG. 2 is a fragmentary view showing the internal bypass in the open position during pressure equalization.
Thermostatic expansion valve 10 is utilized in a refrigeration system including compressor C, condenser K, receiver R (optional) and an evaporator E.
Expansion valve 10 has an inlet 12 connected to the outlet of the receiver and an outlet 14 connected to the inlet of the evaporator.
Needle valve 16 cooperates with valve seat 18 to control flow from inlet 12 to outlet 14.
Valve 16 is urged towards the closed position by superheat spring 20 compressed between seat 22 (supported on the end of adjustment screw 24) and plate 26 mounted (and sealed) on the bottom of the valve.
Flanged collar 28 fits slidably over valve 16 with flange 30 engaging the top of valve shoulder 32.
Valve 16 has a central aperture 34 and an internal chamber 36 which permits condenser pressure to be applied to the underside of flange 30 through equalizing ports 38 located in shoulder 32.
Diaphragm 40 is clamped between cup 42 and head 44.
Conduit 46 communicates between outlet 14 and chamber 48 so the underside of diaphragm 40 is subjected to the evaporator pressure.
Thermal-sensing bulb 50 connected by capillary tube 52 to head 44, is in direct communication with chamber 54.
Bulb 50 is charged with a temperature responsive charge and is strapped on the evaporator outlet.
the top side of diaphragm 40 is subjected to a pressure which is the function of the evaporator outlet temperature.
Valve 16 is actuated towards the open position by push pins 56, the upper ends of which bear against diaphragm pad 58 and the lower ends of which bear against the top of flange 30 (In FIG. 1, the upper portion of the left push pin has been purposely omitted for clarity). Due to the spring 20 acting against diaphragm 40 through push pins 56, collar 28 and valve 16 remain engaged during normal valve operation until valve 16 seats.
valve 16 When valve 16 is closed, push pins 56 and collar 28 are in the position shown in FIG. 1 and there is no flow between inlet 12 and outlet 14.
the movement of spring 20 is limited by the seating of valve 16 so collar 28 is held in engagement with valve 16 only by diaphragm 40.
the condenser pressure in chamber 36 acting against the diaphragm through push pins 56
the condenser pressure in chamber 36 acting against the diaphragm through push pins 56
Collar 28 is returned to the seated position by diaphragm 40 (acting through push pins 56) after pressure equalization. Since equalizing ports 38 are norrapid pressure in valve 64 acts as a by-pass valve to control flow through equalizing port 66. After compressor shutdown and the forces across the diaphragm are balanced, condenser pressure in chamber 36 (acting against the diaphragm through push pin 60) can lift the push pin from seat 62. As the push pin is liftedv away from the seat, equalizing port 66 is opened and the pressures of the condenser and the evaporator rapidly equalize.
valve means such as a ball, interposed the push pin and seat 62 can be used to control the flow through equalizer port 66.
a by-pass valve means controlling flow through said port, the pressure in said chamber acting on the by-pass valve means in a valve opening direction;
a thermostatic expansion valve according to claim 1 in which the control valve includes a second seat located at the outlet of said port and the means connecting the diaphragm and the control valve includes push pins, one of which cooperates with said'second seat to act as said by-pass valve means.
a thermostatic expansion valve according to claim 2 in which the control valve is in the general form of a needle valve and the conduit is central of the needle valve.
a thermostatic expansion valve in which the means connecting the diaphragm and the contr lvalve includes ush ins, said b ass valve means being positioned be weer i the push gi s and the control valve whereby the spring acting on the control valve holds the by-pass valve means closed until the control valve closes on its seat.
a thermostatic expansion valve in which the control valve is in the general form of a needle valve and the conduit is central of the needle valve, said plate being annular.

Landscapes

Engineering & Computer Science (AREA)
General Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Mechanical Engineering (AREA)
Fluid Mechanics (AREA)
Thermal Sciences (AREA)
Temperature-Responsive Valves (AREA)
Safety Valves (AREA)

US128977A 1971-03-29 1971-03-29 Thermal expansion valve with rapid pressure equalizer Expired - Lifetime US3699778A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US12897771A	1971-03-29	1971-03-29

Publications (1)

Publication Number	Publication Date
US3699778A true US3699778A (en)	1972-10-24

Family

ID=22437896

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
US128977A Expired - Lifetime US3699778A (en)	1971-03-29	1971-03-29	Thermal expansion valve with rapid pressure equalizer

Country Status (7)

Country	Link
US (1)	US3699778A (it)
CA (1)	CA935353A (it)
DE (1)	DE2215150C3 (it)
ES (1)	ES401271A1 (it)
FR (1)	FR2131662A5 (it)
GB (1)	GB1379459A (it)
IT (1)	IT950784B (it)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4236669A (en) *	1978-12-18	1980-12-02	Borg-Warner Corporation	Thermostatic expansion valve with lead-lag compensation
US4750334A (en) *	1987-03-26	1988-06-14	Sporlan Valve Company	Balanced thermostatic expansion valve for refrigeration systems
US4852364A (en) *	1987-10-23	1989-08-01	Sporlan Valve Company	Expansion and check valve combination
US5251459A (en) *	1991-05-28	1993-10-12	Emerson Electric Co.	Thermal expansion valve with internal by-pass and check valve
US5277364A (en) *	1992-12-18	1994-01-11	Sporlan Valve Company	Dual capacity thermal expansion valve
US5423480A (en) *	1992-12-18	1995-06-13	Sporlan Valve Company	Dual capacity thermal expansion valve
US5588590A (en) *	1993-11-30	1996-12-31	Kabushiki Kaisha Saginomiya Seisakusho	Expansion valve combined with a solenoid valve
FR2781041A1 (fr) *	1998-07-08	2000-01-14	Sanden Corp	Soupape d'expansion thermostatique a fonctionnement reduit sous l'influence de la pression dans un passage de refrigerant
FR2782547A1 (fr) *	1998-08-19	2000-02-25	Danfoss As	Soupape d'expansion
US6418741B1 (en)	2000-05-03	2002-07-16	Parker Hannifin Corporation	Expansion/check valve assembly including a reverse flow rate adjustment device
US20040098997A1 (en) *	2002-11-22	2004-05-27	Lg Electronics Inc.	Air conditioner and method for controlling electronic expansion valve of air conditioner
US20040112974A1 (en) *	2002-12-17	2004-06-17	Law Scott P.	Block valve with integral refrigerant lines
US20040129008A1 (en) *	2002-10-18	2004-07-08	Dianetti Eugene A.	Refrigeration expansion valve with thermal mass power element
US20070119208A1 (en) *	2005-10-20	2007-05-31	Ecr Technologies, Inc.	Refrigerant Fluid Flow Control Device and Method
US20070194140A1 (en) *	2006-02-17	2007-08-23	Emerson Electric Co.	Thermostatic expansion valve
CN100425930C (zh) *	2005-07-28	2008-10-15	株式会社电装	温度式膨胀阀
US20130248020A1 (en) *	2010-11-30	2013-09-26	Claus Thybo	Expansion valve with variable opening degree
US10036578B1 (en) *	2013-09-03	2018-07-31	Mainstream Engineering Corporation	Integrated cold plate with expansion device and uniform cooling method achieved therewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3829101A1 (de) *	1988-08-27	1990-03-01	Sueddeutsche Kuehler Behr	Thermostatisches expansionsventil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2967403A (en) *	1957-12-23	1961-01-10	Sporlan Valve Co	Constant pressure expansion valve

1971
- 1971-03-29 US US128977A patent/US3699778A/en not_active Expired - Lifetime
1972
- 1972-02-01 CA CA133676A patent/CA935353A/en not_active Expired
- 1972-03-02 GB GB981272A patent/GB1379459A/en not_active Expired
- 1972-03-27 IT IT22420/72A patent/IT950784B/it active
- 1972-03-27 FR FR7210703A patent/FR2131662A5/fr not_active Expired
- 1972-03-28 ES ES401271A patent/ES401271A1/es not_active Expired
- 1972-03-28 DE DE2215150A patent/DE2215150C3/de not_active Expired

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2967403A (en) *	1957-12-23	1961-01-10	Sporlan Valve Co	Constant pressure expansion valve

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4236669A (en) *	1978-12-18	1980-12-02	Borg-Warner Corporation	Thermostatic expansion valve with lead-lag compensation
US4750334A (en) *	1987-03-26	1988-06-14	Sporlan Valve Company	Balanced thermostatic expansion valve for refrigeration systems
US4852364A (en) *	1987-10-23	1989-08-01	Sporlan Valve Company	Expansion and check valve combination
US5251459A (en) *	1991-05-28	1993-10-12	Emerson Electric Co.	Thermal expansion valve with internal by-pass and check valve
US5277364A (en) *	1992-12-18	1994-01-11	Sporlan Valve Company	Dual capacity thermal expansion valve
US5423480A (en) *	1992-12-18	1995-06-13	Sporlan Valve Company	Dual capacity thermal expansion valve
US5588590A (en) *	1993-11-30	1996-12-31	Kabushiki Kaisha Saginomiya Seisakusho	Expansion valve combined with a solenoid valve
FR2781041A1 (fr) *	1998-07-08	2000-01-14	Sanden Corp	Soupape d'expansion thermostatique a fonctionnement reduit sous l'influence de la pression dans un passage de refrigerant
US6112998A (en) *	1998-07-08	2000-09-05	Sanden Corporation	Thermostatic expansion valve having operation reduced with influence of pressure in a refrigerant passage
FR2782547A1 (fr) *	1998-08-19	2000-02-25	Danfoss As	Soupape d'expansion
ES2168183A1 (es) *	1998-08-19	2002-06-01	Danfoss As	Valvula de expansion.
US6418741B1 (en)	2000-05-03	2002-07-16	Parker Hannifin Corporation	Expansion/check valve assembly including a reverse flow rate adjustment device
US20040129008A1 (en) *	2002-10-18	2004-07-08	Dianetti Eugene A.	Refrigeration expansion valve with thermal mass power element
US6848624B2 (en)	2002-10-18	2005-02-01	Parker-Hannifin Corporation	Refrigeration expansion valve with thermal mass power element
US20040098997A1 (en) *	2002-11-22	2004-05-27	Lg Electronics Inc.	Air conditioner and method for controlling electronic expansion valve of air conditioner
US6843067B2 (en) *	2002-11-22	2005-01-18	Lg Electronics Inc.	Air conditioner and method for controlling electronic expansion valve of air conditioner
US6868684B2 (en)	2002-12-17	2005-03-22	Parker-Hannifin Corporation	Block valve with integral refrigerant lines
US20040112974A1 (en) *	2002-12-17	2004-06-17	Law Scott P.	Block valve with integral refrigerant lines
CN100425930C (zh) *	2005-07-28	2008-10-15	株式会社电装	温度式膨胀阀
AU2006308550B2 (en) *	2005-10-20	2011-03-17	Earthlinked Technologies, Inc.	Refrigerant fluid flow control device and method
US20070119208A1 (en) *	2005-10-20	2007-05-31	Ecr Technologies, Inc.	Refrigerant Fluid Flow Control Device and Method
US7987681B2 (en) *	2005-10-20	2011-08-02	Earthlinked Technologies, Inc.	Refrigerant fluid flow control device and method
US20070194140A1 (en) *	2006-02-17	2007-08-23	Emerson Electric Co.	Thermostatic expansion valve
US7707844B2 (en) *	2006-02-17	2010-05-04	Emerson Electric Co.	Thermostatic expansion valve with bypass passage
US20130248020A1 (en) *	2010-11-30	2013-09-26	Claus Thybo	Expansion valve with variable opening degree
US9170039B2 (en) *	2010-11-30	2015-10-27	Danfoss A/S	Expansion valve with variable opening degree
US20160018142A1 (en) *	2010-11-30	2016-01-21	Danfoss A/S	Expansion valve with variable opening degree
US10036578B1 (en) *	2013-09-03	2018-07-31	Mainstream Engineering Corporation	Integrated cold plate with expansion device and uniform cooling method achieved therewith

Also Published As

Publication number	Publication date
DE2215150C3 (de)	1980-11-06
DE2215150A1 (de)	1972-10-05
IT950784B (it)	1973-06-20
ES401271A1 (es)	1975-02-16
FR2131662A5 (it)	1972-11-10
CA935353A (en)	1973-10-16
GB1379459A (en)	1975-01-02
DE2215150B2 (de)	1980-03-20

Legal Events

Date

Code

Title

Description

1986-01-17

AS

Assignment

Owner name: CONTROLS COMPANY OF AMERICA, 9655 W. SORENG AVENUE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SINGER COMPANY, THE;REEL/FRAME:004505/0515

Effective date: 19860110

1986-10-08

AS