Method for preventing hunting of expansion valve within refrigeration cycle
AssigneeTokyo Electron Limited
InventorsMasamichi Yano, Masakatsu Minowa
Life of this patent
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Abstract
A thermal expansion valve includes an adsorbent 40′ placed inside a temperature sensing unit 70, wherein an activated carbon having pore sizes fit for the molecular sizes of a temperature-responsive working fluid sealed inside the temperature sensing unit 70 is utilized as said adsorbent 40′, so that the adsorption quantity of the adsorbent will be fixed.
Claims8
A thermal expansion valve including a temperature sensing member and a working fluid sealed inside said temperature sensing member, the pressure of said working fluid varying according to temperature, wherein an adsorbent having pore sizes fit for the molecular sizes of said working fluid is placed inside said temperature sensing member.
A thermal expansion valve including a refrigerant passage formed to the interior thereof extending from an evaporator to a compressor constituting a refrigerant cycle, and a temperature sensing/pressure transmitting member formed within said passage having a temperature sensing function and comprising a hollow portion formed therein, said thermal expansion valve controlling the opening of a valve according to the temperature of a refrigerant detected by said temperature sensing/pressure transmitting member,
- wherein a working fluid which varies its pressure according to said temperature is sealed inside said hollow portion, and an adsorbent having pore sizes fit for the molecular sizes of said working fluid is placed inside said hollow portion.
A thermal expansion valve including a temperature sensing pipe for sensing the temperature of a refrigerant at the exit of an evaporator constituting a refrigeration cycle, said thermal expansion valve controlling the opening of a valve according to said refrigerant temperature sensed by said temperature sensing pipe,
- wherein a working fluid which varies its pressure according to said temperature is sealed inside said temperature sensing pipe, and an adsorbent having pore sizes fit for the molecular sizes of said working fluid is placed inside said hollow portion.
A thermal expansion valve including a refrigerant passage formed to the interior thereof extending from an evaporator to a compressor, and a temperature sensing/pressure transmitting member formed within said passage having a temperature sensing function and comprising a hollow portion formed therein,
- wherein the end of said hollow portion of the temperature sensing/pressure transmitting member is fixed to the center opening of a diaphragm constituting a power element for driving said member, an upper pressure chamber formed by said diaphragm to the interior of said power element and said hollow portion being connected to form a sealed space in which a working fluid is sealed, and wherein an adsorbent having pore sizes fit for the molecular sizes of said working fluid is placed inside said hollow portion.
A thermal expansion valve comprising a power element having a diaphragm being displaced according to the change in the pressure transmitted from a heat sensing pipe, a working fluid which converts temperature into pressure being sealed to the interior of said pipe, and a working shaft contacting said diaphragm at one end and displacing a valve member at the other end,
- wherein an adsorbent having pore sizes fit for the molecular sizes of said working fluid is placed inside said temperature sensing pipe.
Dependencies are inferred from the claim text.