Evaporator

An evaporator adapted for use in refrigerating cycle for a refrigerant, comprising:

• an inlet for introduction of the refrigerant to be evaporated;
• an outlet for removal of the refrigerant after evaporation;
• an inlet passageway having a predetermined length and connected to the inlet for allowing a flow of the refrigerant from the inlet;
• evaporating means connected to the inlet passageway for obtaining a heat exchange between the refrigerant inside and a fluid outside the evaporating means, for an evaporation of the refrigerant therein;
• first pressure reducing means arranged upstream from said inlet passageway for throttling the flow of the refrigerant to the inlet passageway for reducing a pressure of the refrigerant flowing into the inlet passageway;
• second pressure reducing means arranged between the inlet passageway and the evaporating means for throttling the flow of the refrigerant from the inlet passageway to the evaporating means, to thereby reduce a pressure of the refrigerant flowing into the evaporating means;
• an outlet passageway having a predetermined length and connected to the outlet, for allowing a flow of the refrigerant while in a combined gas-liquid state from the evaporating means;
• the inlet and outlet passageways being arranged close to each other in such a manner that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant in the outlet passageway is brought to a superheated vaporized state.

An evaporator adapted for use in a refrigerating cycle for a refrigerant, comprising,

• an inlet for introduction of the refrigerant to be evaporated;
• an outlet for removal of the refrigerant after evaporation;
• an inlet passageway having a predetermined length and connected to the inlet for allowing a flow of the refrigerant from the inlet;
• a plurality of evaporating passageways connected to the inlet passageway for obtaining a heat exchange between the refrigerant inside the evaporating passageway and a fluid outside the evaporating passageway, to thereby evaporate the refrigerant therein;
• first pressure reducing means arranged upstream from said inlet passageway for throttling the flow of the refrigerant to the inlet passageway for reducing pressure of the refrigerant flowing into the inlet passageway;
• second pressure reducing means arranged between the inlet passageway and the evaporating passageway for throttling the flow of the refrigerant from the inlet passageway to the evaporating passageways, to thereby reduce the pressure of the refrigerant in the evaporating passageways, and;
• an outlet passageway having a predetermined length and connected to the outlet for providing a flow of the refrigerant while in a combined gas-liquid state from the evaporating passageway;
• the inlet and outlet passageways being arranged close with each other so that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant can be brought to a superheated vapor state in the outlet passageway.

An evaporator adapted for use in a refrigerating cycle for a refrigerant, comprising:

• an inlet for introduction of the refrigerant to be evaporated;
• an outlet for removal of the refrigerant after evaporation;
• an inlet passageway having a predetermined length and connected to the inlet for allowing a flow of the refrigerant from the inlet;
• evaporating means connected to the inlet passageway for obtaining a heat exchange between the refrigerant inside and a fluid outside the evaporating means, for an evaporation of the refrigerant therein;
• an inlet passageway having a serpentine portion for providing a number of changes of a direction of a flow of the refrigerant, to thereby reduce a pressure of the refrigerant flowing into the evaporating means;
• an outlet passageway having a predetermined length and connected to the outlet, for allowing a flow of the refrigerant while in a combined gas-liquid state from the evaporating means;
• first pressure reducing means arranged upstream from said inlet passageway for throttling the flow of the refrigerant to the inlet passageway for reducing pressure of the refrigerant flowing into the inlet passageway;
• and
• second pressure reducing means arranged between the inlet passageway and said evaporating means for reducing of the refrigerant flowing into the evaporating means;
• the inlet at said serpentine portion and outlet passageways being arranged close to each other in such a manner that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant in the outlet passageway is brought to a superheated vaporized state.

An evaporator adapted for use in a refrigerating cycle having an expansion valve, comprising:

• an inlet for an introduction of the refrigerant to be evaporated;
• an outlet for a removal of the refrigerant after evaporation;
• said inlet being located downstream of the expansion valve, for receiving the refrigerant from the expansion valve;
• an inlet passageway having a predetermined length and connected to the inlet for providing a flow of the refrigerant from the inlet;
• evaporating means connected to the inlet passageway for obtaining a heat exchange between the refrigerant from the inlet passageway and a fluid outside the evaporating means, to thereby evaporate the refrigerant therein;
• first pressure reducing means arranged upstream from said inlet passageway for throttling the flow of the refrigerant to the inlet passageway for reducing a pressure of the refrigerant flowing into the inlet passageway;
• second pressure reducing means arranged between the inlet passageway and the evaporating means for throttling the flow of the refrigerant from the inlet to a passageway adjacent to the evaporating passageway, for reducing the pressure of the refrigerant flowing into the evaporating mans, and;
• an outlet passageway having a predetermined length and connected to the outlet, for allowing a flow of the refrigerant, while in a combined gas-liquid state from the evaporating passageway;
• the inlet and outlet passageways being arranged close to each other in such a manner that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant is brought to a superheated vaporized state in the outlet passageway.

A refrigerating system comprising:

• a recirculating line for a refrigerant;
• a compressor arranged on the recirculation line for compressing the refrigerant;
• a condenser arranged on the recirculation line downstream of the compressor for condensing the refrigerant in a gaseous state and having a high pressure and a high temperature from the compressor;
• an expansion valve arranged on the recirculation line downstream of the condenser, for subjecting the refrigerant to an adiabatic expansion process;
• an evaporator arranged on the recirculation line downstream of the condenser, for vaporizing the refrigerant having a reduced pressure after expansion;
• pressure reducing means arranged on the recirculation line between said expansion valve and said evaporator for reducing a pressure of the refrigerant from the expansion valve to the evaporator, and;
• a heat exchange device for obtaining a heat exchange of the refrigerant between the expansion valve and the pressure reducing means with the refrigerant after it is evaporated by the evaporator when in a gas-liquid state and before becoming a completely saturated gas.

An evaporator adapted for use in a refrigerating cycle for a refrigerant, comprising:

• an inlet for an introduction of the refrigerant to be evaporated;
• an outlet for a removal of the refrigerant after evaporation;
• heat exchange means having a plurality of an inlet passageways having a predetermined length and connected to the inlet for allowing a flow of the refrigerant from the inlet;
• evaporating means for obtaining a heat exchange between the refrigerant from the inlet passageways and a fluid outside the evaporating means, to thereby evaporate the refrigerant therein;
• first pressure reducing means arranged upstream from said inlet passageway for throttling the flow of the refrigerant to the inlet passageway for reducing a pressure of the refrigerant flowing into the inlet passageway;
• and
• second pressure reducing means located between the inlet passageway and the evaporating means, for throttling the flow of the refrigerant from the inlet passageway to the evaporating means to thereby reduce the pressure of the refrigerant flowing into the evaporating means;
• said heat exchange means further having a plurality of outlet passageways having a predetermined length for allowing a flow of the refrigerant from the evaporating passageways;
• the inlet and outlet passageways being arranged close to each other such that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant is brought to a superheated vaporized state in the outlet passageway.

An evaporator adapted for use in a refrigerating cycle for a refrigerant, comprising:

• a joint block having an inlet for an introduction of the refrigerant to be evaporated and an outlet for a removal of the refrigerant after evaporation;
• a heat exchange section having at least one passageway having a predetermined length, and connected to the inlet for allowing a flow of the refrigerant from the inlet and;
• first pressure reducing means arranged in the refrigerating cycle for reducing the pressure of the refrigerant;
• an evaporating section disposed downstream from the first pressure reducing means, having at least one evaporation passageway connected to the inlet passageway, for obtaining a heat exchanged between the refrigerant from the inlet passageway and a fluid outside the evaporating means to thereby evaporate the refrigerant therein, and at least one orifice arranged between the inlet passageway and the evaporating passageway for throttling the flow of the refrigerant from the inlet passageway to the evaporating means, to thereby reduce the pressure of the refrigerant flowing into the evaporating means;
• said heat exchange section further having at least one outlet passageway having a predetermined length and connected to the outlet, for allowing a flow of the refrigerant while in a combined gas-liquid state from the evaporating means;
• the inlet and outlet passageways being arranged close to each other such that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby refrigerant is brought to a super heated vaporized state in the outlet passageway.

An evaporator adapted for use in a refrigerating cycle for a refrigerant, comprising:

• an inlet for an introduction of the refrigerant to be evaporated;
• an outlet for a removal of the refrigerant after evaporation;
• heat exchange means having a plurality of an inlet passageways having a predetermined length and connected to the inlet, for allowing a flow of the refrigerant from the inlet;
• evaporating means for obtaining a heat exchange between the refrigerant from the inlet passageways and a fluid outside the evaporating means, to thereby evaporate the refrigerant therein, and;
• pressure reducing means located between the inlet passageway and the evaporating means, for throttling the flow of the refrigerant from the inlet passageway to the evaporating means to thereby reduce the pressure of the refrigerant flowing into the evaporating means;
• said heat exchange means further having a plurality of outlet passageways having a predetermined length for allowing a flow of the refrigerant from the evaporating passageways;
• the inlet and outlet passageways being arranged close to each other such that the refrigerant in the outlet passageway is heated by the refrigerant in the inlet passageway, whereby the refrigerant is brought to a superheated vaporized state in the outlet passageway, said heat exchange means comprising a plurality of stacked plates, each of said plates having first and second portions outwardly projected therefrom and third and fourth portions opposingly projected therefrom, the first, second, third and fourth portions forming first, second, third and fourth openings, respectively, and a corrugated section at an area of each of the plates other than the first, second, third and fourth projected portions, adjacent plates being arranged to be opposingly faced so that inlet passageways are formed between the facing plates at the corrugated portion, and the outlet passageways being formed between adjacent plates opposite the inlet passageway, the first and the second openings of the plates being in communication with the inlet passageways, and the third and the fourth openings of the plates being in communication with the outlet passageways.