Abstract: An expansion valve 101 comprises a substantially prismatic-shaped valve body 301 made of aluminum alloy. On the valve body 301 is formed a first passage 32 through which a liquid-phase refrigerant travels towards an evaporator, and a second passage 34 through which a gas-phase refrigerant travels from the evaporator toward a compressor. On the upper portion of the valve body 301 is mounted a power element portion 36 for driving the valve mounted in the middle of a first passage 32. On the side surfaces 301a of the valve body 301 are formed protruding portions 301c, and to the protruding portions, penetrating holes 50 for inserting the bolt for mounting the expansion valve are formed.

Abstract: An expansion valve 1 comprises a housing 10 having refrigerant paths and a cassette unit 100. The cassette unit 100 comprises a flange 111 and a tube member 110 formed integrally thereto. An adjustment plate member 266 is mounted to the small-diameter end of the tube member 111 having steps, the plate member having an external thread 266a formed thereto. A bottom portion 46 of the inner bore of the housing for mounting the cassette is provided with an internal thread 46a. A head portion 121 of the lid member 120 of the cassette unit has a hexagonal shape, which enables the cassette unit 100 to be screwed onto the housing 10 using a tool such as a wrench.

Abstract: An expansion valve 1 comprises a piping member 10 having passages to which pipes for a refrigerant are connected, and a cassette unit 100, which are formed as separate components. The cassette unit 100 comprises a tube member 110 accommodating a guide member 170, an orifice member 180 and a plate member 166. A diaphragm 130 sandwiched between a rising portion 121 of a lid 120 and an end 110′c of the tube member 110 and defining a gas charge chamber 122 is displaced, the movement of which is transmitted to a shaft member 150. The shaft member 150 is guided by a guide member 170and drives a valve member 160 disposed within a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed by a ring 50. Seal members 62, 64, 66 are disposed to necessary areas.

Abstract: An expansion valve 1 comprises a piping member 10 having passages to which pipes for refrigerant are connected, and a cassette unit 100, which are formed as separate components. The cassette unit 100 comprises a flange portion 111 and a tube member 110 which are welded together, and to the interior of which are fixed a guide member 170, an orifice member 180 and a plate member 166. According to the pressure of gas filled in a gas charge chamber 122 defined by a lid 120 and a diaphragm 130, the diaphragm 130 is displaced, the movement of which is transmitted through a stopper 140 to a shaft member 150. The shaft member 150 is guided by a guide member 170 and drives a valve member 160 disposed within a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed by a ring 50. Seal members 62, 64, 66 are fit to necessary areas.

Abstract: An evaporator 10 of an air conditioner comprises a refrigerant entrance port 12 and a refrigerant exit port 14. A division wall 16 of the evaporator is extended to form a housing 200. The housing 200 comprises an inlet 210 for the refrigerant traveling from a compressor, an outlet 220 communicating with the entrance port 12 of the evaporator, and a refrigerant path 230 returning from the evaporator. The cassette unit 100 comprises a pipe member 110, a flange member 120 and a lid member 130, with major components of the expansion valve such as a diaphragm and a driving member for driving a valve means assembled thereto. The cassette unit 100 is accommodated in a hole 240 with steps of the housing 200 to complete the expansion valve.

Abstract: A method for preventing hunting of a thermal expansion valve used to control the flow of refrigerant supplied to an evaporator in a refrigeration cycle. A refrigeration apparatus is provided with a compressor, a condenser, a receiver, an expansion valve, and an evaporator connected in this order, spherically activated carbon made of phenol having pore sizes fit for molecular sizes of a working fluid is prepared; and the spherically activated carbon is provided into the expansion valve; whereby hunting, or the repeated opening and closing of the expansion valve, is prevented.

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.

Abstract: An expansion valve 101 comprises a substantially prismatic-shaped valve body 301 made of aluminum alloy. On the valve body 301 is formed a first passage 32 through which a liquid-phase refrigerant travels towards an evaporator, and a second passage 34 through which a gas-phase refrigerant travels from the evaporator toward a compressor. On the upper portion of the valve body 301 is mounted a power element portion 36 for driving the valve mounted in the middle of a first passage 32. On the side surfaces 301a of the valve body 301 are formed protruding portions 301c, and to the protruding portions, penetrating holes 50 for inserting the bolt for mounting the expansion valve are formed.

Abstract: An expansion valve 1 comprises a piping member 10 equipped with passages to which refrigerant pipes are to be connected, and a cassette unit 100, the two members being formed as separate units. The cassette unit 100 comprises a tube member 110 having a flange portion 111, and at the interior of the tube member 110 are fixed a guide member 170, an orifice member 180, and a plate member 166. The pressure of gas filled in a gas charge chamber 122 defined by a lid 120 and a diaphragm 130 displaces the diaphragm 130, the displacement being transmitted to a shaft member 150 through a stopper member 140 including at the center thereof a tubed portion 142 storing an absorbent. The shaft member 150 is guided by a guide member 170 and controls the valve means 160 inside a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed to position by a ring 50. Seal members 62, 64, and 66 are equipped to appropriate areas between the cassette unit and the piping member.

Abstract: Two case members of the same shape are attached to the body of an expansion valve and a temperature sensing drive element through sound insulating members. Each of the two case members is formed having upper retaining and retainable portions at its upper part and lower retaining and retainable portions at its lower part. The upper retaining portion, upper retainable portion, lower retaining portion, and lower retainable portion of one of the case members are in engagement with the upper retainable portion, upper retaining portion, lower retainable portion, and lower retaining portion, respectively, of the other case member.

Abstract: A system and method for preventing hunting of a thermal expansion valve used to control the flow of refrigerant supplied to an evaporator in a refrigeration cycle. A refrigeration apparatus is provided with a compressor, a condenser, a receiver, an expansion valve, and an evaporator connected in this order, spherically activated carbon made of phenol having pore sizes fit for molecular sizes of a working fluid is prepared; and the spherically activated carbon is provided into the expansion valve; whereby hunting, or the repeated opening and closing of the expansion valve, is prevented.

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.

Abstract: An expansion valve comprises an orifice 30 formed in a valve body 10 and a valve member 9 fixed to a movable member 18. Movement of a diaphragm 4 is transmitted to an actuating rod 17 via a member 16, and the actuating rod 17 actuated the movable member 18 to control the opening amount of the path between the valve member 9 and the orifice 30. An orifice member 100 affixed to the orifice 30 is made of a material harder than the valve body 10, and free from erosion or other damage by a refrigerant, which will otherwise occur at the valve opening portion.

Abstract: The valve body has an orifice that provides communication between a high-pressure side passage through which a cooling medium flows in and a low-pressure side passage through which the cooing medium flows out. Also, the valve is provided with a valve element that adjusts the volume of the cooling medium passing through this orifice, an operating rod that operates the valve element in the valve opening position, and a temperature-sensing drive section that drives this operating rod. On the upstream side of the orifice of the high-pressure side passage is disposed a support ring that constrains the ball-shaped valve element of the valve body.

Abstract: An expansion valve 1 comprises a square-column-shaped valve body 10, and a spherical valve means 30 housed within a valve chamber 20 opposing against a valve seat 22. A working shaft 50 coming into contact with said valves means 30 connects to a stopper member 60, thereby transmitting to the valve means 30 the movement of a diaphragm 230 being displaced by the pressure change in a pressure chamber 240 of a power element 200. A lower housing 220 of the power element 200 is provided with an opening portion and claws, which enable the power element to be coupled to a mounting unit 100 formed to the top portion of the valve body 10. An elastic packing member 150 enables the element to be securely and airtightly coupled to the body. According to the present invention, the assembling of the valve is simplified and the manufacturing cost is reduced.

Abstract: An expansion valve 1 comprises a piping member 10 equipped with passages to which refrigerant pipes are to be connected, and a cassette unit 100, the two members being formed as separate units. The cassette unit 100 comprises a tube member 110 having a flange portion 111, and at the interior of the tube member 110 are fixed a guide member 170, an orifice member 180, and a plate member 166. The pressure of gas filled in a gas charge chamber 122 defined by a lid 120 and a diaphragm 130 displaces the diaphragm 130, the displacement being transmitted to a shaft member 150 through a stopper member 140 including at the center thereof a tubed portion 142 storing an absorbent. The shaft member 150 is guided by a guide member 170 and controls the valve means 160 inside a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed to position by a ring 50. Seal members 62, 64, and 66 are equipped to appropriate areas between the cassette unit and the piping member.

Abstract: An expansion valve 1 comprises a piping member 10 equipped with passages to which refrigerant pipes are connected, and a cassette unit 100, the two members being formed as separate units. The cassette unit 100 comprises a tube member 110 having a flange portion 111, and at the interior of the tube member 110 are fixed a guide member 170, an orifice member 180, and a plate member 166. The pressure of the gas filled in a gas charge chamber 122 defined by a lid 120 and a diaphragm 130 displaces the diaphragm 130, the displacement being transmitted through a stopper member 140 to a shaft member 150. The shaft member 150 is guided by a guide member 170 and controls the valve means 160 inside a valve chamber 161. The cassette unit 100 is inserted to the piping member 10 and fixed to position by a ring 50. Seal members 62, 64, and 66 are equipped to appropriate areas between the cassette unit and the piping member.

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.

Abstract: A power element portion 36′ mounted on the upper portion of an expansion valve body comprises an upper cover 36d and a lower cover 36h, and is divided into an upper pressure chamber 36b and a lower pressure chamber 36c by a diaphragm 36a. A heat sensing drive shaft 101 is formed of a large radius portion 105 and a heat conducting shaft 103 integrally formed thereto. The stopper portion 104 contacting the lower surface of the diaphragm 36a is a member which is formed separately from the heat sensing drive shaft 101, and supported within the lower cover 36h. When the expansion valve is taken apart, the heat sensing drive shaft 101 is pulled out from the inside of the mounting seat 362 of the power element portion 36′, and the refrigerant remaining inside the upper pressure chamber 36b is taken out and collected from the side of the diaphragm.

Abstract: An expansion valve 101 comprises a substantially prismatic-shaped valve body 301 made of aluminum alloy. On the valve body 301 is formed a first passage 32 through which a liquid-phase refrigerant travels towards an evaporator, and a second passage 34 through which a gas-phase refrigerant travels from the evaporator toward a compressor. On the upper portion of the valve body 301 is mounted a power element portion 36 for driving the valve mounted in the middle of a first passage 32. On the side surfaces 301a of the valve body 301 are formed protruding portions 301c, and to the protruding portions, penetrating holes 50 for inserting the bolt for mounting the expansion valve are formed.