Abstract: A refrigeration and defrost system utilizing various valves for opening a defrost line to hot gas and regulating the pressure in refrigerant lines. A slug surge suppressor is provided at several points in the defrost and refrigerant lines to alleviate hydraulic shock damage caused by liquid/gas "slugs" passing rapidly through the lines. The slugs are commonly formed by the required rapid opening of the various valve of the system. Capillary passages in the suppressor resist liquid flow while allowing gas to flow freely.

Abstract: A calculator apparatus 10 includes the standard calculator mode and several other modes functions namely; a pressure-temperature conversion, a temperature-to-pressure conversion based on refrigerant, a relative humidity reading based on input of the dry bulb and wet bulb temperature; and a flow-energy rate conversion mode based upon a selected fuel meter dial and Metric or English units. In addition, a Fahrenheit-to-centigrade conversion and a centigrade-to-Fahrenheit conversion functions are incorporated. The calculator includes a keyboard 18, a microprocessor 16, a timer 26, a power source 12, a switch 14 and a display screen 22.

Abstract: An air cooler system for use in association with an air circulation system and having a process air heat exchanger for recovering heat from the process air in the system, a vacuum chamber with a vacuum chamber heat exchanger in communication with the process air heat exchanger so as to transfer heat from process air heat exchanger to the vacuum chamber heat exchanger, a water supply for supplying water to the vacuum chamber and, vacuum source to draw a predetermined degree of vacuum in the vacuum chamber so as to reduce the boiling point of water therein.

Abstract: A compact efficient air flotation dryer with a built-in afterburner for combustion of solvent-laden air within a dryer-enclosed combustion chamber. An internal exhaust fan propels internal solvent-laden air across a burner where it combusts, causing a heat rise. Heated, combusted air is routed to a recirculating supply air fan which provides for pressurized heated air for air bars for drying a web. Heated air in excess of that required to dry the web is vented externally and helps to maintain desired solvent concentration levels Variable parameters such as fan speed, burner temperatures, air box pressures, exhaust air rate, solvent concentration, supply air flow, supply air temperature and damper vane position are monitored, and the components are actuated to effect a high level of clean up efficiency.

Abstract: The invention consists of a process for evacuating volatile gases from confined spaces (notably refrigerants from refrigerating machinery), dissolving them in polar solvents by compression, cooling or both, purifying them, storing them and releasing them from solution by decompression or heating or both.

Abstract: The present invention is a furnace control system responsive to a circulator fan motor fault condition. Upon detection of the fault, the control determines a first time period which is required to activate the temperature limit switch of the furnace by continuous operation of the gas burner and a second time period which is required for the plenum to dissipate sufficient heat to deactivate the temperature limit switch. After determining the first and second time periods, the furnace control operates the burners for a fraction of the first time period and then allows the heat exchangers to cool for the second time period until the circulator fan motor fault is corrected or the demand for heat ceases.

Abstract: A miniaturized apparatus for air conditioning comprising an assembly made up of a Peltier effect thermoelectric device, in the form of bimetallic or plurimetallic plates connected to a low voltage D.C. power supply, the opposed cold and hot surface of which are in contact with respective heat exchangers, said assembly being contained in a housing in which two distinct and separate conduits are provided for the forced flow of air through the respective ones of said heat exchangers.

Abstract: The present invention relates to a window-type air conditioner comprising a body provided with a first portion and a second portion, the portions being partitioned by a intermediate plate. The first portion includes an inlet portion for intaking air from an indoor room and an outlet portion for discharging heat exchanged (conditioned) air into the indoor room. The inlet and outlet portions are relatively thin and are mounted at a window of the room extending forward to communicate with the room and isolate the second portion from the window. The second portion includes an operating portion which is mounted at an outside wall of the room. This invention allows for greater visibility through the window in which the air conditioner is mounted, and greatly reduces the operational noise from entering the indoor room.

Abstract: A headwear device for cooling the wearer during athletic activity or work. The device is comprised of a cap having interior and exterior surfaces. At least one opening to at least one defined compartment chamber within the cap. The chamber is formed therewithin the interior and exterior surfaces of the cap. The chamber interior having at least one surface being of material capable of transmission of fluid from the chamber interior to the cap's interior surface.

Abstract: A field installable device for a conventional heating and air conditioning system (HVAC) is provided which operates a blower fan in conjunction with a standard thermostat. Presently, HVAC systems operate in four modes: heating, cooling, off and fan "on". The device includes a multi-pole, multi-speed motor and a control operatively connected between the thermostat and the motor. With the fan switch in the "on" position and heating or cooling called for, the control causes the blower to operate at a high speed, which may be different for heating or cooling. When the pre-selected temperature is reached the particular thermal operation (i.e., heating or cooling) is stopped. The control switches the motor to a speed substantially slower than the operating condition speed to provide continuing air circulation until the thermostat again calls for thermal operation. With the switch in "auto" position, the blower operates similarly to present systems.

Abstract: A structure is provided in which fundamental component parts including a base plate and an outer casing are integrally formed of resin moldings 2 and 3 on the indoor side and the outdoor side, and a bulk head 4 formed of a sheet metal is provided as a partition between the indoor side and the outdoor side, so that the number of fundamental parts is small and that an improvement in quality can be achieved.

Abstract: A refrigerant recovery and purification system that includes a refrigerant compressor having an inlet for connection to refrigeration equipment under service from which refrigerant is to be recovered. The outlet of the compressor is connected through a condenser to a refrigerant storage vessel or container, with the condenser at least partially liquifying refrigerant prior to passage to the storage container. A liquid refrigerant pump is connected for selectively circulating refrigerant in liquid phase in a closed path from the storage container through a filter for removing contaminants from the refrigerant, and then through the condenser back to the storage container. Refrigerant circulated by the liquid pump in the closed path is thus simultaneously purified by passage through the filter and cooled by passage through the condenser.

Abstract: An apparatus for reclaiming contaminated refrigerant is disclosed. This apparatus contains three heat exchangers, the first of which cools the refrigerant to a temperature of less than about 32 degrees Fahrenheit, the second of which cools the refrigerant to a temperature of less than about -40 degrees Fahrenheit, and the third of which cools the refrigerant to a temperature of less than about -100 degrees Fahrenheit. The device also contains filtering means, for removing from the cooled refrigerant substantially all particles larger than about 0.1 microns. The device also contains gas removing means, for removing noncondensable gas from the filtered refrigerant.

Abstract: A container that keeps liquids cold includes an upstanding hollow post that defines an upstanding cavity having an open end at the lowermost end of the container. A frozen plug is inserted into the cavity from the lowermost end and locked into place. The hollow post is made of a noninsulating material so that the cold plug lowers the temperature of the liquid in the container or reduces the rate of temperature increase of the liquid. The plug need not be maintained in a clean condition because it never comes into contact with the liquid in the container.

Abstract: A refrigerant recovery and purification system is provided. A one-pass system removes refrigerant, filters and purifies it and condenses and stores the refrigerant in its liquid state for reuse. A collection tank is provided which separates the non-condensible gases, thereby eliminating pressure buildup in the storage tank. The non-condensible gases are vented back to the system to selectively provide positive pressure for vacuum relief. The system also includes an oil separator for refrigerant which has passed through the compressor with a feedback line to return the oil to the compressor.

Abstract: A refrigerant overcharge prevention system is applied to a refrigerant charging apparatus which has a refrigerant supply source and a refrigerant supply pipe connected to a refrigerant circuit of a cooling apparatus. The charging apparatus charges refrigerant into the refrigerant circuit while activating a compressor provided in the refrigerant circuit. The system comprises a refrigerant flow suppressing mechanism provided in the refrigerant supply pipe for preventing an excessive flow of refrigerant being charged, a refrigerant charge determining sensor provided in a high-pressure side path of the refrigerant circuit for determining whether the amount of charged refrigerant reaches a desired level by sensing a change of the state of refrigerant present in the refrigerant circuit, and a compressor deactivating circuit for deactivating the compressor in response to the determination of the refrigerant charge determining sensor.

Abstract: Provision is made in a refrigeration purge system for sensing certain conditions indicative of failure of components within the system, to responsively shut-down the system and prevent refrigerant from being undesirably vented to the atmosphere. Failure conditions sensed include inadequate cooling medium to the condenser coil and failure of a relief valve.

Abstract: A self contained, mechanical cooling apparatus is mountable on a door which is pivoted on hinges to a door frame. The door may be mounted for either exterior or interior service in a residential or commercial setting. The door frame is attached to the building structure in a conventional manner. The door provides a closure for a designated room and the door mounted cooling apparatus maintains the desired, generally lower, temperature in the room. Major cooling components mounted in the door include a refrigerant compressor, evaporator coil, condenser coil, accumulator, capillary tubing, refrigerant piping and electrical components. The parts are enclosed in a one piece, premolded plastic apparatus housing. Two supply air fans are mounted within the housing, and molded in supply and return air grilles communicate with the enclosed space.

Abstract: A heat control and interface stress control principle for a material in which a piezoelectric member is positioned in contact with an interface of the material so that a heat generated expansion of the material generates a piezoelectric signal that controls a thermoelectric cooler in contact with the piezoelectric member.

Abstract: A portable refrigeration system and process for flushing and cleaning an installed refrigeration system including disconnecting the compressor from the installed system and connecting the disconnected lines to a portable refrigeration system including a compressor, a condenser, a receiver, an evaporator, a filter, and a dehydrator so as to form a closed circuit of the installed system and the portable system; operating the portable system to flush refrigerant through the installed system alternately as a liquid and as a gas, and alternately in the normal and reverse directions of flow; passing the flushing refrigerant through a filter for removing particulate matter and through a dehydrator for removing aqueous contaminants; and returning the installed system to its separate operating circuit when all parts and when the refrigerant is judged to be cleaned.