EP0378933A3 - Evaporator and flow control means assembly for a refrigerating machine - Google Patents

Evaporator and flow control means assembly for a refrigerating machine Download PDF

Info

Publication number
EP0378933A3
EP0378933A3 EP89403410A EP89403410A EP0378933A3 EP 0378933 A3 EP0378933 A3 EP 0378933A3 EP 89403410 A EP89403410 A EP 89403410A EP 89403410 A EP89403410 A EP 89403410A EP 0378933 A3 EP0378933 A3 EP 0378933A3
Authority
EP
European Patent Office
Prior art keywords
bulb
discharge pipe
evaporator
expansion valve
pressure
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.)
Withdrawn
Application number
EP89403410A
Other languages
German (de)
French (fr)
Other versions
EP0378933A2 (en
Inventor
Bernard Zimmern
Jean Louis Picouet
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.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0378933A2 publication Critical patent/EP0378933A2/en
Publication of EP0378933A3 publication Critical patent/EP0378933A3/en
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/068—Expansion valves combined with a sensor
    • F25B2341/0681—Expansion valves combined with a sensor the sensor is heated
    • 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
    • F25B2500/15—Hunting, i.e. oscillation of controlled refrigeration variables reaching undesirable values
    • 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
    • F25B2600/21—Refrigerant outlet evaporator temperature

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Temperature-Responsive Valves (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The expansion valve 103 of the refrigerating machine is controlled by the difference between the pressure in a bulb 104 containing a fixed amount of fluid and the pressure in the evaporator 2. The bulb is mounted in the discharge pipe 1 of the evaporator and is heated by a resistor. In the absence of droplets of liquid refrigerant in the flow through the discharge pipe, i.e. when the refrigerant flow rate tends to become too low with respect to the cold demand, the resistor heats up the fluid in the bulb, the pressure in the bulb increases and moves the expansion valve to a more opened position. As soon as droplets hit the bulb in the discharge pipe, said droplets cool down the bulb despite the heating effect of the resistor and the expansion valve is moved to a more closed position. Thus, the flow rate control uses variations in heat transfer coefficients in the discharge pipe rather than superheat temperature in the discharge pipe. The evaporator may be small-sized because it does not have to produce superheat.
EP89403410A 1988-12-09 1989-12-08 Evaporator and flow control means assembly for a refrigerating machine Withdrawn EP0378933A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8816207 1988-12-09
FR8816207 1988-12-09

Publications (2)

Publication Number Publication Date
EP0378933A2 EP0378933A2 (en) 1990-07-25
EP0378933A3 true EP0378933A3 (en) 1990-08-22

Family

ID=9372764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89403410A Withdrawn EP0378933A3 (en) 1988-12-09 1989-12-08 Evaporator and flow control means assembly for a refrigerating machine

Country Status (2)

Country Link
EP (1) EP0378933A3 (en)
JP (1) JPH02263071A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE467592B (en) * 1990-12-07 1992-08-10 Stal Refrigeration Ab DEVICE FOR ASTAD ACCOMMODATION OF A MINIMUM FLOW OF COOLING MEDIUM TO A DRIVER IN A COOL OR HEAT PUMP SYSTEM
DE4115693A1 (en) * 1991-05-14 1992-11-19 Erich Bauknecht Automatic load matching method for refrigeration expansion valve - using setting screw to adjust pressure of valve regulating spring
CH686743A5 (en) * 1993-08-16 1996-06-14 Escher Wyss Gmbh Kaeltemittelverdampfer.
FR2725778B1 (en) * 1994-10-14 1996-12-13 Soprano PILOT AIR CONDITIONER BY A DEVICE PROVIDING A MEASUREMENT RELATING TO THE REFRIGERANT FLUID USED
DE19647718C2 (en) * 1996-11-19 1998-09-24 Danfoss As Process for regulating a refrigeration system as well as refrigeration system and expansion valve
DE10301680A1 (en) * 2003-01-17 2004-07-29 Linde Kältetechnik GmbH & Co. KG Sensor for a thermal injection valve
CN1317537C (en) * 2005-09-08 2007-05-23 上海交通大学 Critical-cross carbon dioxide refrigerating system restriction sleeve
US11079150B2 (en) * 2018-02-20 2021-08-03 Blue Star Limited Method for controlling level of liquid within an evaporator and a system thereof

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969102A (en) * 1930-10-06 1934-08-07 Frick Co Refrigerant control for refrigerating systems
US2209101A (en) * 1938-05-05 1940-07-23 Honeywell Regulator Co Refrigeration system
US2240374A (en) * 1938-08-08 1941-04-29 Honeywell Regulator Co Expansion valve
US2367304A (en) * 1939-10-20 1945-01-16 Honeywell Regulator Co Refrigeration control system
US2534455A (en) * 1944-06-08 1950-12-19 Honeywell Regulator Co Refrigerating control apparatus
US2583178A (en) * 1948-10-21 1952-01-22 Honeywell Regulator Co Refrigeration control apparatus
US2624181A (en) * 1949-05-09 1953-01-06 Affiliated Gas Equipment Inc Means and method of controlling refrigeration systems
FR1178599A (en) * 1956-06-29 1959-05-12 Sulzer Ag Method and device for regulating a refrigerating machine
GB939659A (en) * 1959-08-17 1963-10-16 Atlas As Improvements in or relating to refrigeration plants with flooded evaporators
GB1427926A (en) * 1972-04-05 1976-03-10 Axstane Properties Ltd Compression refrigeration systems
WO1982004142A1 (en) * 1981-05-20 1982-11-25 Richard H Alsenz Method and apparatus for controlling operation of a thermostatic expansion valve
FR2514114A1 (en) * 1981-10-01 1983-04-08 Danfoss As CLOSED CIRCUIT OF HEAT OR COLD PUMP
US4467613A (en) * 1982-03-19 1984-08-28 Emerson Electric Co. Apparatus for and method of automatically adjusting the superheat setting of a thermostatic expansion valve

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1969102A (en) * 1930-10-06 1934-08-07 Frick Co Refrigerant control for refrigerating systems
US2209101A (en) * 1938-05-05 1940-07-23 Honeywell Regulator Co Refrigeration system
US2240374A (en) * 1938-08-08 1941-04-29 Honeywell Regulator Co Expansion valve
US2367304A (en) * 1939-10-20 1945-01-16 Honeywell Regulator Co Refrigeration control system
US2534455A (en) * 1944-06-08 1950-12-19 Honeywell Regulator Co Refrigerating control apparatus
US2583178A (en) * 1948-10-21 1952-01-22 Honeywell Regulator Co Refrigeration control apparatus
US2624181A (en) * 1949-05-09 1953-01-06 Affiliated Gas Equipment Inc Means and method of controlling refrigeration systems
FR1178599A (en) * 1956-06-29 1959-05-12 Sulzer Ag Method and device for regulating a refrigerating machine
GB939659A (en) * 1959-08-17 1963-10-16 Atlas As Improvements in or relating to refrigeration plants with flooded evaporators
GB1427926A (en) * 1972-04-05 1976-03-10 Axstane Properties Ltd Compression refrigeration systems
WO1982004142A1 (en) * 1981-05-20 1982-11-25 Richard H Alsenz Method and apparatus for controlling operation of a thermostatic expansion valve
FR2514114A1 (en) * 1981-10-01 1983-04-08 Danfoss As CLOSED CIRCUIT OF HEAT OR COLD PUMP
US4467613A (en) * 1982-03-19 1984-08-28 Emerson Electric Co. Apparatus for and method of automatically adjusting the superheat setting of a thermostatic expansion valve

Also Published As

Publication number Publication date
JPH02263071A (en) 1990-10-25
EP0378933A2 (en) 1990-07-25

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Effective date: 19930520