Abstract: A refrigerator is disclosed. The refrigerator includes a cabinet comprising a storage chamber, a cold air generation chamber provided above the storage chamber, an evaporator provided in the cold air generation chamber, and a refrigerant tube configured to pass through a predetermined wall of the cold air generation chamber, not passing the storage chamber, to be connected with the evaporator. An object of the present disclosure is to provide a refrigerator which has an efficient installation structure of a refrigerant tube connected with an evaporator provided in a cold air generation chamber provided above a storage chamber to enlarge storage space of the storage chamber.

Abstract: A helium charged refrigerator is capable of cooling a refrigerator box to a temperature of 6° C. (43° F.) and the freezer compartment to a temperature of ?9° C. (15° F.) when the ambient is at a temperature of 43° C. (110° F.). The total cubic area cooled is greater than or equal to six cubic feet. The unit includes a condenser, an evaporator, a liquid ammonia tube, and a gas heat exchanger. The liquid ammonia tube includes two vertical sections. The second section is downstream of the first and is noncontiguous with the heat exchanger so that no heat is exchanged between flowable fluids flowing in the second vertical section and in the heat exchanger. The heat exchanger includes modifications to its inner and outer tubes to produce an increase in surface area of the corresponding surface.

Abstract: This invention employs an arrangement of flat plate heat exchangers and a pump that function as a thermal powered hydronic ammonia absorption chiller. Chilling is achieved by bubbling ammonia gas through a liquid refrigerant causing a reduction of the partial pressure of the refrigerant and evaporation with the absorption of heat. The refrigerant and working fluids can be selected to have a broad range of operating pressures. If the refrigerant and working fluid are selected so that the atmospheric boiling point is the about the same as the highest operating ambient temperature, the chiller can operate with low, or even no internal pressure. The low operating pressures allow the use of light weight materials, easy fabrication, low cost and safety. This chiller is especially suited for using solar heated water, cooling water from internal combustion engines or any source of hot water. The chiller is easily scalable to any size and will find wide application for comfort air conditioning or food storage.

Abstract: An icemaking apparatus includes an evaporator tube, a driving vessel charged with liquid ammonia and a driving gas, a heat source, a return system, and a target material reservoir adapted to be placed in an operating position over the evaporator tube. The evaporator tube has a heat transfer feature formed on and extending from a generally cylindrical outer evaporator tube surface. The heat source applies heat to the driving vessel to force liquid ammonia through an evaporator supply line to an expansion chamber inlet associated with the evaporator tube. The liquid ammonia goes to a gas as it enters the expansion chamber portion of the evaporator tube resulting in a transfer of heat from water or other target material contained in the target material reservoir secured over the evaporator tube in the operating position. The return system returns ammonia and hydrogen gas from the evaporator to the driving vessel.

Abstract: In a vapor compression refrigerant cycle using refrigerant having a critical temperature equal to or less than sixty degrees Celsius, when refrigerant temperature detected by a sensor as a parameter of a low-pressure side refrigerant pressure is higher than a saturation temperature corresponding to a predetermined pressure that is equal to or less than a critical pressure, a volume of air passing through an evaporator is controlled smaller than a predetermined volume by controlling operation of a blower unit. Because heat exchange rate (heat absorbing rate) in the evaporator is controlled, the pressure of the low-pressure side refrigerant is maintained below the critical pressure. Alternatively, the heat exchange rate is controlled by reducing a flow rate of the refrigerant in the evaporator.

Abstract: The present invention provides a structure of an evaporation region of an absorption diffusion type refrigerating circulation. The refrigerating circulation comprises a generator, a rectifier, a condenser, an evaporator, a concentrated ammonia aqueous solution tank, and an absorber. An ammonia liquid pipe and a hydrogen pipe are arranged in a pipeline of the evaporator. The evaporator at the evaporation region has a simple shape and structure, and can be processed easily, hence saving the space thereof. Because the ammonia liquid pipe and the hydrogen pipe are arranged in the evaporator, the effect of heat exchange thereof is better, and the refrigerating temperature is lower.

Abstract: An absorption diffusion type refrigerating structure comprises a generator, a rectifier, a condenser, an evaporator, a concentrated ammonia aqueous solution tank, and an absorber. The absorber is vertical. A spiral device is disposed in the absorber to lengthen the flow path of diluted ammonia aqueous solution, to extend the time of diluted ammonia aqueous solution in the absorber, and to expand the reaction area of diluted ammonia solution in the absorber, thereby reducing the whole weight, shrinking the volume, and enhancing the refrigerating speed. An ammonia liquid pipe and a hydrogen pipe are arranged in the evaporator. The evaporator has a simple and symmetrical shape, and can be processed and assembled easily, hence saving the space thereof. Moreover, because the ammonia liquid pipe and the hydrogen pipe are arranged in the evaporator, the effect of heat exchange thereof is better, and the refrigerating temperature is lower.

Abstract: The present invention provides a structure of the evaporation region of an absorption diffusion type refrigerating circulation. The refrigerating circulation comprises a generator, a rectifier, a condenser, an evaporator, a concentrated ammonia aqueous solution tank, and an absorber. An ammonia liquid pipe and a hydrogen pipe are arranged in a pipeline of the evaporator. The evaporator at the evaporation region has a simple shape and structure, and can be processed easily, hence saving the space thereof. Because the ammonia liquid pipe and the hydrogen pipe are arranged in the evaporator, the effect of heat exchange thereof is better, and the refrigerating temperature is lower.

Abstract: A continuously operable portable icemaker charged with an ammonia solution and pressured to about 450 pounds per square inch with hydrogen and powered with a source of heat to cause percolation of the ammonia solution acts to freeze water charged into a removable refillable cylindrical vessel.

Abstract: In a method for operating a refrigerating unit including an expeller, condenser, evaporator and absorber, with a solvent circulation, a working substance circulation and a by-gas circulation, the working substance ammonia is expelled from a rich ammonia solution with continuous supply of thermal energy and subsequently is liquefied by heat absorption, is evaporated with absorption of heat from a cooling chamber and is absorbed from the weak ammonia solution, regulation of the thermal energy required for expulsion being effected in dependance on temperature changes with relation to a given temperature of the cooling chamber with the aid of an electronical module using fuzzy logic rules.

Abstract: A compact no moving part refrigeration unit powered with a flame driven generator is contained along with a propane cylinder and necessary controls in a cylindrical upright unit with an expanded base; the unit is sized to make four to eight pounds of ice in about a four hour period.

Abstract: In a heat exchanger according to the present invention, there are provided a filling container having a first containing section containing a hydrogen-absorbing metal material for middle or high temperature, a second containing section containing a hydrogen-absorbing metal material for low temperature which is higher in equilibrium hydrogen pressure at the same temperature than the hydrogen-absorbing metal material for middle or high temperature, and a hydrogen passage for moving hydrogen between the first containing section and the second containing section; a guiding section having a heating section provided with heating means for heating the filling container, a heat radiating section provided with a heat exchanging section for radiating heat generated in the filling container outward, and a heat absorbing section provided with a heat exchanging section for cooling the outside by absorption of heat in the filling container; and moving means for moving the filling container back and forth in the guiding sec

Abstract: A heat pump using zeolite as an adsorbent wherein thermal energy from adsorbing zeolite in a one hermetically sealed space is used to heat desorbing zeolite located in another hermetically sealed space, such heat being conveyed by heat exchanger conduits containing a fluid which, before heating the desorbing zeolite, has its temperature increased to about 400.degree. F. by a gas flame, the adsorption and desorption phases being changed between the zeolites in each cycle by reversing the fluid flow in the conduits. Cooling and heating for a building or other purposes are provided through the condenser and evaporator respectively for the working gas (water) which is desorbed and adsorbed into the zeolites. A propagating temperature front is established through the fluid-to-zeolite heat exchanger conduits to provide utilization of as much as ninety percent of thermal energy available during the desorption/adsorption phases.

Abstract: The invention provides an absorption-refrigeration system including:generator means in which the vapor of a volatile refrigerant, dissolved in n absorbent, is driven off the absorbent by heat exchange with a source of thermal energy;condenser means in which the refrigerant vapor is turned into liquid refrigerant;evaporator means in which the liquid refrigerant is turned into refrigerant vapor by heat exchange with the substance to be refrigerated, andabsorber means in which the refrigerant vapor is redissolved in the absorbent to be recycled,characterized in that the refrigerant is selected from the group of fluoro-and fluoro-chloro-hydrocarbons, that the absorbent is an organic polar solvent possessing a strong chemical affinity with respect to the refrigerant, and that at least one of the heat exchanges involves direct contact between the partners to the heat exchange, which partners are mutually non-reactive and non-miscible.

Abstract: This invention relates to an arrangement in an absorption refrigerating apparatus, which operates with a pressure equalizing gas, and is provided with at least two absorbers. A height difference occurs between the liquid level in the standpipe of the boiler and the inlet level of the absorbers in order to supply absorption solution which is weak and refrigerant to the absorbers. At least a major part of the supply conduit is replaced by branch conduits, each one of which has a flow resistance which is at least double the difference between the flow resistances in said branch conduits.

Abstract: A heat pump providing semi-continuous or substantially continuous refrigeration and/or heating in which liquid working fluid in a vaporizer vaporizes at a low pressure by extracting heat from a cold heat source and the vapors are adsorbed in at least one solid adsorbent body. The adsorbent is subsequently heated to desorb vapors at a high pressure, and the vapors condense by giving up heat to a heat sink at a relatively high temperature. The condensed liquid is returned via pressure-reducing means to the vaporizer, and the adsorbent body is cooled. There may be several adsorbent bodies undergoing heating and cooling out of phase with each other.

Abstract: A continuous cycle absorption refrigerating unit is disclosed. Means are provided for limiting the supply of coolant rich solution from an absorber vessel to the vapor forming end of the liquid heat exchanger of the thermosiphon pump whenever the refrigerating unit exceeds a permissible angle of inclination at which the pump is able to pump liquid whereby only a limited amount of inhibitor rich solution can be produced during the period of time during which the unit exceeds the permissible angle of inclination.

Abstract: In an absorption refrigeration system of the kind having an inert, non-condensible pressure-equalizing gas the flow of the gas is controlled by providing a flow restriction in the connection which conveys the stream of inert gas from the absorber to the inlet end of a refrigerant liquid precooler. The flow restriction also diverts part of the gas flow into the low-temperature evaporator.

Abstract: An absorption refrigerating apparatus of the type operating with a pressure equalizing inert gas and having an evaporative precooler for the refrigerant condensate supplied to the evaporator system of the apparatus. The evaporative precooler is constructed in a manner whereby two parallel flow paths are formed that are spaced from one another, but heat-conductively connected together. One of the flow paths is for the partial flow of weak gas while the other flow path is for the refrigerant condensate.