Abstract: A compact, self-contained highly efficient frictional air heating unit is provided which draws a flow of ambient air through an air inlet, frictionally heats the air, and discharges the air through an air outlet. The frictional air heating unit is utilized in a heating and cooling system for providing a source of heated air for heating, for powering an absorption type air conditioner system for cooling, and for heating water.

Abstract: Absorption cycle refrigeration processes and systems are provided which are driven by the sensible waste heat available from industrial processes and other sources. Systems are disclosed which provide a chilled water output which can be used for comfort conditioning or the like which utilize heat from sensible waste heat sources at temperatures of less than 170.degree. F. Countercurrent flow equipment is also provided to increase the efficiency of the systems and increase the utilization of available heat.

Abstract: An absorption refrigeration system having a generator that includes a first, or primary, heat exchanger operatively connected to a low temperature energy source and that includes a second, or auxiliary, heat exchanger operatively connected to a high temperature energy source. Control means are provided so that energy is supplied to the generator from the high temperature energy source only after energy is extracted from the low temperature energy source and additional energy is required by the system. Various embodiments are disclosed showing different ways of positioning and operating the primary and auxiliary heat exchangers. Another embodiment illustrates a condenser system that efficiently operates to condense refrigerant vapor regardless of the distribution of the energy contribution between the high and low energy sources.

Abstract: A capability control apparatus for a cooling system having a direct expansion type evaporator comprises a control valve mounted in a heating system for a generator for controlling an amount of heat to be given to the generator. Temperature sensors are mounted at inlet and outlet sides, respectively, of a cooling system for an absorber, and an arithmetic unit is connected to the temperature sensors and the control valve. The arithmetic unit calculates the amount of heat to be given to the generator based on signals transmitted from the temperature sensors to the unit and issues and transmits to the control valve a control signal for controlling the latter.

Abstract: The control system interrupts the pneumatic signal controlling the demand of chilled water by utilizing a dual port direct acting controller to which are fed an outdoor air humidity signal and outdoor air temperature signal. The dual port direct acting controller provides a signal to control the heating source for the chilled water as a function of the outside air temperature and outside air humidity as well as the internal controls of the absorption system. Thus, the control system provides an optimal decision value for the respective climate range of conditions for the control of the heating source thereby reducing the fuel consumption of the absorption refrigeration system.

Abstract: In combination with the ground vehicle A powered by a waste heat generating electric motor 16, a cooling system 10 including a generator 17 for driving off refrigerant vapor from a strong refrigerant-absorbant solution, including a solar collector 12, an air-cooled condenser 30 connected with the generator for converting the refrigerant vapor to its liquid state, an air-cooled evaporator 38 connected with the condenser for returning the liquid refrigerant to its vapor state, and an absorber 18 is connected to the generator and to the evaporator for dissolving the refrigerant vapor in the weak refrigerant-absorbant solution, for thus providing a strong refrigerant solution, a pump 22 for establishing a pressurized flow of strong refrigerant-absorbant solution from said absorber through the electric motor, and thence to the collector.

Abstract: The present application discloses an absorption refrigerating system which comprises a main generator constituted by a high temperature generator to evaporate and separate a refrigerant from an absorbent with a high temperature heat source being utilized as a heat source, and a low temperature generator to separate a refrigerant from the absorbent with the refrigerant evaporated at the high temperature generator being utilized as a heat source; an auxiliary generator to separate a refrigerant from the absorbent with a low temperature heat source being utilized as a heat source; a condenser; an evaporator; an absorber or the like; and in which said devices above-mentioned are connected by refrigerant lines and absorbent lines to form the circulation cycles of the refrigerant and the absorbent.

Abstract: A chiller and heat pump system employing the Peltier effect in a diffusion still combined with a steam-jet refrigeration unit associated with a condenser and with an evaporator absorption unit, and associated pump means and valve control means for multi mode operation including; simultaneous low temperature heating and cooling, cooling, heating, and simultaneous high temperature heating and cooling.

Abstract: An external intake-discharge duct for a burner-operated refrigerator having a sealed system. The intake communicates with the atmosphere outside of a trailer or a motor home and is located in a service door for the burner of a refrigerating apparatus. Atmospheric air is conducted downward through the air intake to the burner, and hot combustion gases are conducted upwards through a flue pipe and out through a discharge or outlet. The duct terminates in a cap-like structure located externally in a wall of a trailer or motor home.

Abstract: This application discloses a single effect and double effect absorption refrigerating system, in which water is used as a refrigerant and LiBr as an absorbent, for example. A refrigerating cycle is formed by connecting in an air-tight manner a high temperature generator to be heated by a high temperature heat source, a first low temperature generator to be heated by refrigerant vapor separated from a dilute solution in said high temperature generator, a condenser, an evaporator, an absorber, a first heat exchanger and a second heat exchanger by means of refrigerant lines, dilute solution lines and dense solution lines. A second low temperature generator to be heated by a low temperature heat source is disposed between one of the dilute solution lines and one of the dense solution lines so as to communicate with said condenser, whereby the supply of a solution and a fuel to said high temperature generator may be controlled dependent on the heating capacity of said second low temperature generator.

Abstract: A control means is disclosed that is used with a closed refrigeration system having a chiller and a condenser to provide refrigeration to chill the fluid medium and a refrigerant pump for pumping the refrigerant through the system with refrigerant capacity control means determining the capacity of the refrigerant, the control means for the system using signal inputs representative of outside air temperature, return chilled water temperature, supply chilled water temperature, and condenser temperature, in which settable controllers are used to determine the optimum temperature signals for controlling the system at any given time. A timer is also connected to the control mechanism for alternately interrupting an optimum temperature signal to reduce the overall change in the control signal. Additional control may be obtained through the use of signals representative of humidity, strong solution temperature and cooling water output pressure.

Abstract: A method and apparatus for conserving the amount of energy used to drive an absorption refrigeration generator while concomitantly insuring satisfaction of system load demands.The system includes an absorption refrigeration generator having a concentrator section, a condenser section, an evaporator section and an absorber section wherein a heating medium, such as steam, is circulated through the concentrator section to vaporize refrigerant within the system and a closed loop, chilled water, heat exchange system is used to transfer cooling potential from the evaporator section to the system load, such as an office building. Control of the energy delivered to the concentrator for liberating refrigerant and thus providing cooling in the evaporator is achieved by sensing the temperature of the chilled water as it returns from the cooling load and modulating energy input to the concentrator to maintain a generally constant set temperature of the return chilled water.

Abstract: An absorption refrigeration system responsive to variant load demands provides a conventional absorption unit and a control system which adjusts the operation of the unit according to the load demand. The absorption unit has an evaporator-absorber section where refrigerant is flash cooled in a near vacuum and absorbent solution absorbs the refrigerant vapor; a generator-condenser section where the solution diluted with refrigerant is heated vaporizing the refrigerant to be condensed and returned to the evaporator; a condenser fluid supply which supplies condenser fluid to the absorber and condenser for heat transfer and carries away heat dissipated therein; a heat source supply which heats the solution in the generator; and, a chilled fluid supply which supplies a chilled fluid to the evaporator for the flash cooling heat transfer and carries the cooled chilled fluid to fan coil units for refrigeration purposes.

Abstract: A safety arrangement in a gas-operated apparatus, such as an absorption refrigerator, having a safety device that controls the gas system and, when required, automatically re-ignites the flame of the gas burner that has become extinguished. The system has a thermostat that is connected to a switch for opening a gas valve when it is necessary to supply gas to the burner. A filament or igniter is also provided which is arranged adjacent to the burner and has a switch which breaks the circuit to the gas valve when a sensor or flame detector at the burner is exposed to a flame.

Abstract: In a mobile absorption refrigeration system wherein the refrigerator has at least one electric heater and a gas burner, the refrigeration system is connected to a vehicle by way of a separable plug assembly which includes one circuit for supplying electric power to the heater, and a control arrangement disabling the gas heater as long as the electric power source of a towing vehicle is connected to the refrigeration system.

Abstract: An absorption refrigeration system is adapted to be energized by plural sources of a heating system stored at different temperatures. A control system automatically selects the proper source of supply to the generator in response to the temperatures of the heating medium of the plural sources and to the temperature of heated medium entering the generator. The temperature of heated medium entering the generator is dependent upon the respective temperatures of (1) the cooling water, used to cool the condenser and absorber coils, and (2) the chilled water supplied to the load, vary in response to changing conditions.

Abstract: An absorption refrigeration system having a generator that includes a first, or primary, heat exchanger operatively connected to a low temperature energy source and that includes a second, or auxiliary, heat exchanger operatively connected to a high temperature energy source. Control means are provided so that energy is supplied to the generator from the high temperature energy source only after energy is extracted from the low temperature energy source and additional energy is required by the system. Various embodiments are disclosed showing different ways of positioning and operating the primary and auxiliary heat exchangers. Another embodiment illustrates a condenser system that efficiently operates to condense refrigerant vapor regardless of the distribution of the energy contribution between the high and low energy sources.

Abstract: An electrical control system for an absorption heat pump capable of conditioning a space by cooling or heating including:(a) a unit activation component 64a having an on and off position responsive to temperature in the space to be conditioned;(b) a mode selection switch 64e having a heating mode position and a cooling mode position;(c) safety switches 64c for sensing hazardous operating conditions;(d) a timer device 60 which is activated by the unit activation component 64a and the safety switches 64c and which, after a predetermined period of activation, turns an output 64 to an on position;(e) a first control circuit 68 for operating the outside fan 15a when the unit activation component 64a is in the on position;(f) a second control circuit 69 for operating the solution pump 30 when the timer output 64 is in the on position;(g) a third control circuit 70 for operating the second or chilled coolant pump 12p when the timer output 64 is in the on position;(h) a fourth control circuit 71 and 71' for moving a

Abstract: An absorption refrigeration system has an electric heater connectable to an electric power source, and a gas burner connectable to a gas supply. A voltage responsive circuit is connected to disable the gas burner circuit when the voltage of an electric supply means is above a determined level, and to disable the electric heating circuit and enable the gas heating burner when the voltage is below the determined value.

Abstract: An automatic control system for an absorption refrigerator in a vehicle, such as a recreational vehicle, which is connected to a motor-driven generator. The refrigerator is operated alternatively by either 110 A.C. voltage, 12 volt D.C. voltage, or by gas. If gas is only available, the refrigerator is automatically operated by that means, however, the ignition of the gas burner is prevented when the vehicle is stopped in a filling station and the generator ceases to operate. The arrangement has means which delays the closing of a circuit through a control system after another circuit, including a heating cartridge, has been interrupted.

Abstract: This air conditioning system includes low pressure water vaporization, transfer and absorption, both in a solution concentrating section using solar radiation or other heat input and in a solution diluting section where heat exchange with ambient fan blown air subsequently permits cooling or heating enclosure air. The fan blown enclosure air is cooled or heated in passing through the same heat exchanger by changing the flow paths of the solutions passing to and from the two unique vapor exchangers, which are described in detail. The solutions are separated but contained in a sealed system with storage volume to give a large heat capacity potential by changing the solution concentration to either cool or heat the enclosure air.The various system operational modes are described in detail, with the functioning of the vapor exchangers and heat exchangers in concert with the flows through pipes and ducts as generated by pumps and fans together with control by valves.

Abstract: The present invention relates to an improvement of a solar refrigeration system. The solar refrigeration system has been improved by combining a solar collector-generator and a heat exchanger into one unit to increase the performance efficiency of the system by eliminating heat losses. The solar collector-generator comprises a tube and header arrangement including a plurality of double-walled tubes, each consisting of an outer pipe and an inner pipe, the inner pipe defining a passage for a high temperature refrigerant-lean or weak solution, whereas, the outer and inner tubes defining therebetween a passage for a low temperature refrigerant-rich or strong solution.

Abstract: An absorption refrigeration system is adapted to be powered by solar energy or a source of relatively low temperature waste heat. A control system automatically adjusts the maximum energizing temperature as the temperature of the cooling water, used to cool the condenser and absorber coils, varies.

Abstract: A spray generator for an absorption refrigeration system that includes a heat exchanger comprised of a multiplicity of variably spaced heat exchange tubes. The tubes are spaced close together near the top of the heat exchanger and spaced more widely apart near the bottom of the heat exchanger. Dilute absorbent solution is sprayed down through the heat exchanger. The close nesting of the tubes in the top portion of the heat exchanger retards liquid flow and aids heating of the solution. The wide spacing of the tubes in the lower section of the heat exchanger facilitate vapor flow out of the heat exchanger and eliminates liquid "blow-off". The top tubes are covered by a baffle to prevent the liquid solution from splashing out of the heat exchanger off of these top tubes.

Abstract: In a gas burner ignition device for a gas-operated refrigerator, the ignition electrode of a high voltage generating unit and the flame detecting rod of a flame detector are formed into one unit to miniaturize the device. The device comprises timer means which when the flame detector or the high voltage generating unit is out of order, operates to suspend the supply of gas to the gas burner.

Abstract: An absorption refrigeration system utilizes a solar collector in the heat input circuit and includes means within the collector housing for condensing water vapor released from the absorbent solution. Ambient air abstracts heat from the vapor and causes condensation thereof.

Abstract: Solar energy is collected by a plate-shaped panel of pliable plastic construction. The two major walls of the panel whose edges are sealed to each other consist of transparent and black plastic respectively and bound a cavity. The panel is expanded by air introduced by a blower and discharged through a restricted outlet. A radiation trap of pleated, transparent plastic sheeting is fastened in the cavity to the transparent wall. The hot air discharged from the panel when it collects solar radiation provides all the necessary energy for operating an absorption refrigeration system of the Electrolux type.

Abstract: An absorption refrigeration system having a primary condenser-generator unit powered by solar energy, or any other suitable relatively low temperature energy source. A secondary condenser-generator unit is operatively connected to the primary unit. The secondary unit is powered by a refrigerant circuit arranged to move the heat of condensation developed in the secondary condenser into the secondary generator. The secondary condenser-generator unit is used to either augment or supplement the primary combination.

Abstract: An absorption refrigeration system utilizes a solar collector in the heat input circuit.

Abstract: Control system capable of controlling the refrigeration capacity of a refrigeration system adapted for cooling a fluid medium, the refrigeration system being of the type including a refrigerant; an absorbent having an affinity for the refrigerant; an evaporator for bringing the refrigerant into heat transfer relationship with the fluid medium, the evaporator having an inlet for receiving the fluid medium to be cooled in an outlet for discharging cooled fluid medium; an absorber in communication with the evaporator for removing refrigerant vapor therefrom; means for supplying a concentrated absorbent-refrigerant solution to the absorber; means for cooling the absorber to maintain the pressure therein below the pressure in the evaporator whereby refrigerant vapor migrates to the absorber to combine with the concentrated solution to produce a dilute solution; a concentrator for removing a portion of the refrigerant from the dilute solution for recirculation to the evaporator and for providing the concentrated so

Abstract: In an absorption refrigerator having a non-electric boiler heating system, a box having a coolable interior and a side at which refrigerating equipment is mounted, the refrigerating equipment including a boiler and a heating burner located adjacent the boiler for heating the same, electrically energizable blower means carried by the box, and thermocouple means mounted within heating range of the heating burner, the thermocouple means being electrically connected to the blower means for energizing the latter with electricity generated in the thermocouple means by the heating burner.

Abstract: A combined air-heating and refrigeration system wherein the air temperature of a living area is maintained within a predetermined range. A conventional furnace isprovided with a heat exchanger for heating air carried within ducts which communicate air from within the living space for circulation past the furnace for heating. The refrigeration portion of the system may be either of the compression or of the absorption type. In the preferred embodiment an absorption type is used and comprises a generator for heating an absorbent and a refrigerant. The heated refrigerant is communicated to a condenser to cause the refrigerant to condense, and the condensed refrigerant is then expanded by a suitable expansion valve and communicated to an evaporator wherein the refrigeration process takes place. The refrigerant is then mixed with the absorber and recirculated to the generator by means of a circulation pump.