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GB2311625A - Refrigeration system with automatic pumpdown of refrigerant on detection of leakage. - Google Patents

Refrigeration system with automatic pumpdown of refrigerant on detection of leakage. Download PDF

Info

Publication number
GB2311625A
GB2311625A GB9606561A GB9606561A GB2311625A GB 2311625 A GB2311625 A GB 2311625A GB 9606561 A GB9606561 A GB 9606561A GB 9606561 A GB9606561 A GB 9606561A GB 2311625 A GB2311625 A GB 2311625A
Authority
GB
United Kingdom
Prior art keywords
refrigerant
pumpdown
automatic
leakage
detection
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Withdrawn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
GB9606561A
Other versions
GB9606561D0 (en
Inventor
Tu-Huu Mac
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.)
MAC TU HUU
Original Assignee
MAC TU HUU
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 MAC TU HUU filed Critical MAC TU HUU
Priority to GB9606561A priority Critical patent/GB2311625A/en
Publication of GB9606561D0 publication Critical patent/GB9606561D0/en
Publication of GB2311625A publication Critical patent/GB2311625A/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Withdrawn legal-status Critical Current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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/221—Preventing leaks from developing

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Description

AUTOMATIC PUMPDOWN CONTROL DEVICE This invention relates to an electronic automatic pumpdown control device.
The electronic automatic pumpdown control device is specifically for use in any refrigeration and air conditioning system which has a liquid receiver.
This control device has been designed to prevent the build-up of refrigerants by audible and visual alarm before sufficient refrigerant has leaked. The device will pump down and stop the compressor well before a dangerous level is reached.
The control device will be activated on sensing the refrigerant around the condensing unit, evaporator, or in the surrounding air.
In the automatic mode the refrigerant will all he pumped into the receiver after the sensor is activated for a preset period of time. This time period may he altered by adjusting the delay control from zero to four minutes.
During the alarm "ON" time, the buzzer will sound and the "Alarm Activated n indicator will also light, and remain on until the OFF/RESET switch is operated, thus giving an indication that the system has been tripped off. The system may he turned on at any time by using the RESET/ALARM switch.
The compressor may be turned ON/OFF manually by using the AUTO/ON switch. The failure indicator will remain permanently on until the leaks have been fixed.
A specific embodiment of the invention will now be described by way of example with reference to the operation steps, as shown below: Step 1 will be activated on leakage of refrigerant; Step 2 audible and visual alarm when activated; Step 3 response to stop the refrigerant flow on pumpdown.
Step 4 Pumpdown until the low pressure reaches 2 psig; Step 5 The compressor/system will stop operating when low pressure reaches 2 psig.
SPECIFICATION Power source available in 115/230 V AC 12/24 V DC.
Overload protection; None sparks change contact relay switching up to 10 amp.
The switching time can be adjustable by the delay contact from zero to 4 minutes.
Room operating temperature from -10 C to +50"C.
Enclosure made from anti-shock material,

Claims (2)

  1. CLAIMS 1. An "Automatic Pumpdown Control Device" is a pumpdown control to detect leakage of refrigerant. It will control the solenoid valve to stop the refrigerant flow and pump down. It will respond to pump all refrigerant into the liquid receiver when there is any leakage of refrigerant.
  2. 2. An " Automatic Pumpdown Control Device" as claimed in Claim 1. above where it responds to pump all refrigerant into liquid receiver. This means the compressor continues to pump until the low pressure reaches 2 psig, stopping operation until the leak has been located and repaired.
GB9606561A 1996-03-28 1996-03-28 Refrigeration system with automatic pumpdown of refrigerant on detection of leakage. Withdrawn GB2311625A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9606561A GB2311625A (en) 1996-03-28 1996-03-28 Refrigeration system with automatic pumpdown of refrigerant on detection of leakage.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9606561A GB2311625A (en) 1996-03-28 1996-03-28 Refrigeration system with automatic pumpdown of refrigerant on detection of leakage.

Publications (2)

Publication Number Publication Date
GB9606561D0 GB9606561D0 (en) 1996-06-05
GB2311625A true GB2311625A (en) 1997-10-01

Family

ID=10791210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9606561A Withdrawn GB2311625A (en) 1996-03-28 1996-03-28 Refrigeration system with automatic pumpdown of refrigerant on detection of leakage.

Country Status (1)

Country Link
GB (1) GB2311625A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104395678B (en) * 2012-05-14 2017-02-22 三菱电机株式会社 Air conditioning device
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644755A (en) * 1984-09-14 1987-02-24 Esswood Corporation Emergency refrigerant containment and alarm system apparatus and method
WO1989012752A1 (en) * 1988-06-17 1989-12-28 Svenska Rotor Maskiner Ab Rotary positive displacement compressor and refrigeration plant
GB2239952A (en) * 1989-12-15 1991-07-17 Para Mech Ltd Sensor system eg for chlorofluorocarbons (CFCs)

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644755A (en) * 1984-09-14 1987-02-24 Esswood Corporation Emergency refrigerant containment and alarm system apparatus and method
WO1989012752A1 (en) * 1988-06-17 1989-12-28 Svenska Rotor Maskiner Ab Rotary positive displacement compressor and refrigeration plant
GB2239952A (en) * 1989-12-15 1991-07-17 Para Mech Ltd Sensor system eg for chlorofluorocarbons (CFCs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104395678B (en) * 2012-05-14 2017-02-22 三菱电机株式会社 Air conditioning device
US11441820B2 (en) 2018-09-06 2022-09-13 Carrier Corporation Refrigerant leak detection system

Also Published As

Publication number Publication date
GB9606561D0 (en) 1996-06-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)