F-Term-List

F25D21/00-21/02@Z;21/06-21/12

AA00
TECHNICAL OUTLINE

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AA02

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AA07

AA08

. Freezer structures

. Electrical controls

. Coolant flow controls

. Improvements to device components

. . Electrical parts

. . Freezer parts

. Installation, support, or securing means

. Manufacturing methods and processes

BA00
DEFROSTING SYSTEMS

BA01

BA02

BA03

BA04

BA05

BA06

BA07

BA08

BA09

. Evaporators

. . Tube systems

. . Finned tube systems

. . . Systems with flat plate fins

. . . . Systems with divided flat plate fins

. . Flat-surface defrosting means

. . . Pipe-on-sheet systems

. Drain water channels

. Others

CA00
DEFROSTING SYSTEMS

CA01

CA02

CA03

CA04

CA05

CA06

CA07

CA08

. Heating systems

. . Means for circulating high-temperature freezer coolants

. . . Hot-gas bypasses

. . . Reverse-cycle operation

. . Electric heaters

. . . Defrost heaters

. . . . Radiation heaters

. . . . Flat-plate heaters

CA11

CA12

CA13

CA14

CA15

CA16

CA17

CA18

. Gas-spray systems

. . Warm-air circulating systems

. . Use of the latent heat of the outside air

. . High-pressure injection

. Liquid systems

. . Showers

. Natural-melting systems

. Shaving systems

DA00
AUXILIARY DEFROST SYSTEMS

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DA02

DA03

DA04

DA05

DA06

. Air curtains

. . Double-layer flow curtains

. . Multi-layer flow curtains

. Evaporator sealing means

. Heat-conductive materials

. . Heat pipes

EA00
FROST PREVENTION

EA01

EA02

EA03

EA04

EA05

. Elements to which frost adheres

. . Frost-evaporating means

. Means for eliminating moisture

. . Evaporator for eliminating moisture

. Others

FA00
FROST DETECTION MEANS (1)

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. Means using lights or electromagnetic waves

. Thermistors

. Piezoelectric elements

. Moisture-sensitive elements

. Ultrasonic waves

. Air condensors

FB00
FROST DETECTION MEANS (2)

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FB02

FB03

FB04

FB05

FB06

. Temperature detection

. . Temperature detection at multiple points

. Detection of air speed, pressure, or volume

. Detection of load current or electric power

. Weight detection

. Detection of frequency and cycles

GA00
MEANS FOR GENERATING COMMAND TO START THE DEFROST OPERATION

GA01

GA02

GA03

GA04

GA05

GA06

. Timing devices (e.g., defrosting timers)

. . Integrated timers

. . . Integrated timers for regulating freezer operating time

. Frost detectors

. Manually operated means

. Means requiring another signal or condition

GB00
MEANS FOR GENERATING THE COMMAND TO STOP DEFROSTING

GB01

GB02

GB03

GB04

GB05

. Temperature detectors to stop defrosting

. . Bimetal switches (e.g., temperature-sensitive switches)

. Timers

. Devices for detecting frost elimination or reduction

. Manually operated means

HA00
DEFROSTING MODES

HA01

HA02

HA03

. Constant defrosting cycles

. Defrosting starting at the same time daily

. Fixed defrosting duration or interval

JA00
TYPES OF DEFROSTING-RELATED CONTROL

JA01

JA02

JA03

JA04

JA05

JA06

JA07

JA08

JA09

JA10

. Precooling control

. Control of the synchronization gap

. . Valve-operation control

. Freezer operation and controls

. . On-off control

. . Control of the number of compressor revolutions

. . Compressor starting, features, and improvements

. Air blower operations and control

. . On-off control

. . Control of the number of revolutions

JA11

JA12

JA13

JA14

JA15

JA16

JA17

. Automatic-adjustment control for defrosting duration and interval

. Heater capacity control

. Central monitoring control and remote control

. Protection and safety controls

. . Prevention of abnormal rises in temperature

. . Prevention of incomplete defrosting

. Alarm and indication controls

KA00
DETECTION PARAMETERS FOR CONTROL OF CONDITIONS OTHER THAN FROST

KA01

KA02

KA03

KA04

KA05

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KA07

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. Temperature

. . Temperature inside the freezer

. . . Detection at multiple point in a single chamber

. . Evaporator temperature

. . Temperature outside the freezer

. . Condensor temperature

. Pressure

. . Coolant pressure

LA00
CONTROL

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LA02

LA03

LA04

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LA06

LA07

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LA09

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. Devices for changing frequency (e.g., inverters)

. Air blowers

. . Use for air curtains

. . Use for induction of outside air

. . Use for reducing exhaust heat from the freezer

. Fluid pumps

. Air-flow control devices

. . Dampers

. . Shutters

. . Plates for changing air-flow direction

LA11

LA12

LA13

LA14

LA15

LA16

LA17

LA18

LA19

. Valves and electromagnetic valves

. . Freezer-coolant flow-control valves

. . . Flow-adjustment valves

. . . . Expansion valves

. . . Open-close valves

. . . Three-way valves

. . . Hot-gas bypass valves

. . . Bypass valves for the expansion mechanism

. . . Coolant-flow reversal valves for the reverse cycle

LA21

LA22

LA23

. Light switches

. Switches for detecting whether the door is open or closed

. Microcomputers

LA31

LA32

LA33

LA34

LA35

LA36

LA37

. Electric heaters other than defrosting heaters

. . Temperature compensation heaters and heates for prevention of overcooling

. . Heaters for prevention of moisture condensation

. . Heaters for prevention of freezing

. . Channel heaters for the drain water

. . Heaters for heat-sensitive sensors

. . Heaters for coolant flow control

MA00
KINDS OF DRAWINGS

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MA02

MA03

MA04

MA05

MA06

. Charts and graphs

. Flow chart diagrams (i.e., block drawings)

. Flow charts

. Structure and form diagrams

. Structural diagrams of the coolant flow channels

. Electrical circuit diagrams and logic circuit diagrams

3L046	Defrosting systems
	F25D21/00 -21/02@Z;21/06-21/12