|
Match
|
Document |
Document Title |
|
|
4328680 |
Heat pump defrost control apparatus
A heat pump having successive defrosting operations initiated, controlled and timed by a microprocessor-based controller. The time intervals between defrost cycles are periodically varied as...
|
|
|
4312190 |
Glass door merchandiser with heat trap
A refrigerated glass door merchandiser in which heat generated during a defrost cycle of operation is prevented from flowing into the refrigerated display section. The glass door merchandiser is...
|
|
|
4299095 |
Defrost system
A defrost system for refrigeration units, particularly heat pumps, is described. Features include means for initiating a defrost cycle upon the concurrence of two sensed conditions, and terminating...
|
|
|
4291542 |
Air drying apparatus of the condensation type
A condensation air drying apparatus comprising a refrigeration system, the evaporator of which is used for cooling an air flow to or below its dew point whereby the moisture in the air as drawn...
|
|
|
4280332 |
Defrost control monitoring fan motor temperature rise
A defrosting control for a heat pump system utilizes a first temperature sensor mounted to the outdoor coil fan motor windings, a second sensor mounted to sense the outdoor ambient air temperature...
|
|
|
4271899 |
Heat pump control system
The present invention relates to a self-contained air conditioning unit including a reversible refrigeration system and more particularly to a control system having a plurality of sensing means...
|
|
|
4269035 |
Defrost control
A defrost control, including a vertically extending evaporator positioned in thermal contact with the back wall of a chamber. The defrost sensor is arranged above the evaporator and within the...
|
|
|
4215554 |
Frost control system
Frost control apparatus is disclosed for a temperature conditioning system such as a heat pump or the like, wherein a compressor circulates a volatile fluid through the closed system. Frost-buildup...
|
|
|
4200442 |
Apparatus for neutralizing and purifying air
An apparatus for neutralizing and purifying air comprises an air filter, a preliminary drier, two alternately operable driers, a turbine for moving the air, a cooling unit, a heating unit, a...
|
|
|
4184340 |
Temperature sensor mounting means
A sensing device for use in a control for an alarm indicating an undesirable operating temperature condition within a refrigeration apparatus cabinet. The sensing device is mounted to have at least...
|
|
|
4179680 |
Temperature sensor
A thermally responsive sensor assembly such as for use in providing a warning signal indicating a sensed high temperature condition within a refrigeration apparatus. The sensor assembly includes a...
|
|
|
RE29966 |
Heat pump with frost-free outdoor coil
A heat pump having an auxiliary outdoor coil equipped with heating means preventing the surface temperature during the heating cycle from falling below 32° C. The heating means comprises an...
|
|
|
4129993 |
Refrigeration equipment, particularly household refrigeration or the like
Refrigeration equipment, particularly a household refrigerator or the like, having a heat-insulated refrigeration chamber and a refrigeration unit which can be switched-on intermittently by a...
|
|
|
4122687 |
Refrigeration system with low energy defrost
A refrigeration system for a refrigeration unit having an evaporator coil through which cooling fluid is circulated. Air is forced across the evaporator coil and valve means directs the flow of air...
|
|
|
4105064 |
Two stage compressor heating
Electrical control means for use in a heat pump system having dual compressors wherein the operation of each compressor can be staged independently and automatically except for those periods when...
|
|
|
4102391 |
Heat pump frost control system
The present invention relates to a self-contained air conditioning unit including a reversible refrigeration system and more particularly to a control system having a plurality of sensing means...
|
|
|
4074987 |
Defrost sensing system for freezer compartment
A two-door household refrigerator with a separate freezer compartment and a manually-initiated freezer defrost cycle. A frost-sensing means is located in the thermal insulation in outer-spaced...
|
|
|
4045972 |
CO.sub.2 Cooling of vehicles
A system for CO 2 cooling of the cargo compartment of a refrigerated vehicle. A vessel carried by the vehicle holds liquid CO 2 at pressure preferably not greater than about 125 psia. Liquid CO 2...
|
|
|
4027495 |
Vapor recovery system for volatile liquids and vapor condensing apparatus for use therein
A system and apparatus for condensing and recovering vapors of low volatile liquids such as hydrocarbons utilizes, a cascade cooling arrangement for providing and maintaining a cooling fluid such...
|
|
|
4027497 |
Freeze-up prevention device for a heat pump
The present invention relates to heat pumps which include a freeze-up prevention device for use during the heating cycle. The heat pump consists of the normal compressor which connects by means of...
|
|
|
4024722 |
Heat pump frost control system
The present invention relates to a self-contained air conditioning unit including a reversible refrigeration system and more particularly to a control system having a plurality of sensing means...
|
|
|
3953984 |
Piloted throttling valve
A refrigerant control valve for air conditioning systems of the hot gas bypass type including a bypass passage between the compressor outlet and the evaporator inlet through which refrigerant flow...
|
|
|
3950962 |
System for defrosting in a heat pump
A system for defrosting a heat pump system employing a temperature difference type defrosting apparatus, wherein a heat sensitive means is provided at one portion of a pipe connecting an indoor...
|
|
|
3938350 |
Freeze tunnel
Freezing apparatus in which food is quickly frozen comprising five coils, two joined in series to form a first set and two joined in series to form a second set, the exhaust of the two sets being...
|
|
|
3937033 |
Air defrost display case
A multiple curtain, refrigerated display case employing an energy saving air defrost system that, during the first defrost stage, draws defrosting ambient air into the refrigerated air curtain...
|
|
|
3922875 |
Refrigeration system with auxiliary defrost heat tank
A refrigeration system adapted to cycle alternately through a refrigeration cycle and a defrost cycle, wherein a suction accumulator tank is provided in the suction line between the evaporator and...
|
|
|
3922874 |
Evaporator fan delay circuit
A refrigerator control circuit is provided for delaying the starting of the air circulating freezer fan until after the free moisture on the evaporator coils has frozen upon the completion of a...
|
|
|
3918268 |
Heat pump with frost-free outdoor coil
A heat pump having an auxiliary outdoor coil equipped with heating means preventing the surface temperature during the heating cycle from falling below 32°C. The heating means comprises an...
|
|
|
3899895 |
Automatic defrosting control system
An automatic defrosting control system for a refrigeration system having an evaporator or the like for absorbing heat from a zone to be cooled to a predetermined temperature level and being subject...
|
|
|
3899896 |
Automatic defrosting control system
An automatic defrosting control system for a refrigeration system having an evaporator or the like for absorbing heat from a zone to be cooled and a cold control to maintain the zone substantially...
|
|
|
3893307 |
Refrigerator freezer with frost eliminator
A refrigerator-freezer having a forced air circulation system wherein the air is cooled by the evaporator and circulated by fan means to and from side-by-side refrigerator and freezer compartments....
|
|
|
3890798 |
Refrigerator control apparatus
A refrigerator control apparatus comprising an electronic timer including first, second and third counters in which clock signals are applied to the input stage of the first counter, the output...
|
|
|
3872683 |
REFRIGERATION DEFROST SYSTEM
A defrost system for refrigeration apparatus in which operation of the defrost system is initiated by frost build-up on the evaporator of the refrigeration apparatus. The defrost system includes a...
|
|
|
3861167 |
DEFROSTING APPARATUS
A defrosting apparatus for a refrigerator or the like wherein supply of cooling medium to a coil-fin type evaporator is initiated and stopped by sensing the temperature of the evaporator at three...
|
|
|
3854915 |
DEMAND DEFROST CONTROL SYSTEM
A demand defrost system is provided in which a periodic switch device is driven at variable speed in response to relative humidity values ambient to one or more refrigeration units. The periodic...
|
|
|
3845637 |
DEFROST CYCLE INITIATION SYSTEM
A defrost cycle initiation system for refrigeration apparatus (e.g., a refrigerator, a refrigerator-freezer, or a room air conditioner) in which operation of the defrost system is initiated by...
|
|
|
3839878 |
APPARATUS FOR CONTROLLING REFRIGERATOR DEFROST APPARATUS
Apparatus for controlling a defrosting system in a refrigerator including temperature sensing devices to monitor the temperature of the evaporator coil and the storage space. When the difference in...
|
|
|
3826101 |
PLATE DEFROSTING SYSTEM UTILIZING DEFROSTING LIQUID FROM A VEHICLE ENGINE
A vehicle refrigeration system uses an eutectic holdover refrigeration plate unit containing plates with internal defrosting coil. The defrosting coils are supplied with coolant from the vehicle...
|
|
|
3826103 |
APPLIANCE DEFROSTING SYSTEM AND SWITCH MEANS
A defrosting system for an appliance having circulating airflow over cooling coils and means for supplying coolant to the coils, selectively operable means for defrosting the appliance including...
|
|
|
3823572 |
FREEZE PROTECTION DEVICE IN HEAT PUMP SYSTEM
A water source heat pump system having a plurality of zone air conditioning units, each unit adapted for selectively heating or cooling a zone independent of other units, each air conditioning unit...
|
|
|
3822564 |
COMBINATION TYPE REFRIGERATOR
A combination type refrigerator having a freezing storage compartment provided with a heat exchanger and a cold storage compartment also provided with a heat exchanger, wherein a cooler is on-off...
|
|
|
3803862 |
REFRIGERATOR INCLUDING AUTOMATIC ICE MAKER
A refrigerator particularly adapted to the manufacture and storage of ice pieces comprising a below-freezing compartment containing an automatic ice maker and an evaporator including a first...
|
|
|
3802212 |
REFRIGERATION APPARATUS
Apparatus for refrigerating and heating comprising a source of liquid nitrogen arranged to deliver nitrogen selectively through coils of an evaporator or through heating apparatus and then through...
|
|
|
3777505 |
DEFROSTING METHOD AND APPARATUS
In a method of defrosting a first heat exchanger, on the heat source side of refrigerating apparatus having a second heat exchanger on the utilization side and a fluid flow circuit interconnecting...
|
|
|
3774406 |
CONDENSATE COLLECTOR PAN HEATING
A refrigerant evaporator defrost mechanism having improved control means for keeping the drain pan heater energized for a predetermined delay period following termination of the defrost cycle. The...
|
|
|
3757531 |
REFRIGERATION APPARATUS EMPLOYING LIQUIFIED GAS
Refrigeration apparatus is provided which is motivated by the vaporization of liquefied nitrogen or the like. In particular, nitrogen vapor is introduced into a primary heat exchange coil at a high...
|
|
|
3756037 |
IMMERSION MEANS FOR ELECTRICALLY DEFROSTING REFRIGERATION PLATES
A refrigeration system made up of a plurality of individual refrigeration plates each including an eutectic solution. Within each plate is a conduit for passing a refrigerant through the plate to...
|
|
|
3726105 |
CONTROL ARRANGEMENT FOR AUTOMATICALLY DEFROSTING A REFRIGERATOR
A control arrangement for automatically defrosting a refrigerator in which a normally open bi-metal switch is arranged in the circuit of the motor driving the compressor of the refrigerator. The...
|
|
|
3681933 |
DEFROST CONTROL
A defrost control for a refrigerator wherein first and second thermistors are mounted in conductive contact with the evaporator coil and a third thermistor is mounted so as to be responsive to the...
|
|
|
3675438 |
REFRIGERATOR WITH FLUID AMPLIFIER MEANS
A refrigerator includes a first and second storage compartments evaporator means for refrigerating air, means for circulating the refrigerated air to both of the compartments and means for...
|