TGK Co., Ltd. Patent applications |
Patent application number | Title | Published |
20140318164 | AUTOMOTIVE AIR CONDITIONER AND EXPANSION VALVE - A first expansion valve is provided in a first refrigerant circulation passage through which the refrigerant discharged from a compressor is able to circulate by passing sequentially through an external heat exchanger and an evaporator and returning to the compressor. A second expansion valve is provided in a second refrigerant circulation passage through which the refrigerant discharged from the compressor is able to circulate by passing sequentially through an auxiliary condenser and the external heat exchanger and returning to the compressor. The second expansion valve regulates the valve opening degree such that the refrigerant state at an inlet side of the compressor during a heating operation is in a range where the dryness of refrigerant is greater than or equal to 0.9 and the superheat of refrigerant is less than or equal to 5° C. | 10-30-2014 |
20140291562 | Control Valve Driven By Stepping Motor - A control valve according to an embodiment includes: a body having an inlet port, an outlet port, and a valve hole that communicates the inlet port and the outlet port together; a valve element configured to open and close a valve section; a drive mechanism configured to drive the valve element; a stepping motor having both a rotor for operating the drive mechanism and a stator for rotationally driving the rotor; and a can that is a cylindrical member covering a space where the valve element and the drive mechanism are arranged and involving the rotor and that defines a pressure space and a non-pressure space. The can is fixed to the body with a ring screw, and the stator is arranged at an outer circumference of the can and fixed to the body with a screw member. | 10-02-2014 |
20140261765 | Expansion Valve and Vibration-Proof Spring - An expansion valve includes a vibration-proof spring that develops the sliding resistance by biasing a shaft. The vibration-proof spring includes a base portion constituted by a circular plate having a hole, through which the actuating rod can be inserted, in the central region, a plurality of spring portions, which is installed upright on the base portion and which is so formed as to come in contact with the periphery of the actuating rod, and a plurality of supporting pieces, which extend outward from the base portion and which is formed so that the supporting pieces can be stopped by the body. The supporting piece is structured such that the supporting piece includes a low-rigidity portion whose rigidity is lower than that of the base portion. | 09-18-2014 |
20140130916 | COMPOSITE VALVE - A control valve according to an exemplary embodiment includes an interlocking mechanism that achieves a first operation and a second operation simultaneously or continuously. In the first operation, a sub-valve is opened by having an actuating rod displaced integrally with a sub-valve element in accordance with the magnitude of solenoidal force. In the second operation, a load, by which to bias a main valve element in a closing direction of a main valve, is increased by displacing the actuating rod relative to the main valve element. | 05-15-2014 |
20130313461 | CONTROL VALVE - An expansion valve according to one embodiment includes a body having an internal passage through which the working fluid flows, a valve hole provided in the internal passage, a driven member that opens and closes a valve section by touching and leaving the valve hole, a guide member that slidably supports the driven member inserted along the guide member, and a shield wall, provided in the driven member, which closes one end opening of the spacing between the driven member and the guide member when the valve section is fully opened. | 11-28-2013 |
20130283836 | EXPANSION VALVE AND VIBRATION-PROOF SPRING - An expansion valve includes a shaft for transmitting the drive force to a valve element and a vibration-proof spring, set between the body and the shaft, which generates the sliding friction by biasing the shaft. The vibration-proof spring includes a spring body of a hollow tube shape, a spring part, which is integrally formed with a side wall of the spring body, and a bulging portion formed on the spring part in a protruding manner such that the tip of the bulging portion is placed opposite to a part of the shaft. When the bulging portion abuts against the shaft inserted to the vibration-proof spring, the spring part is placed in a position along the spring body or is warped outwardly from the spring body, so that the elastically reactive force resulting from the warped spring part allows the shaft to slide in a stabilized manner. | 10-31-2013 |
20130276920 | CONTROL VALVE FOR A VARIABLE DISPLACEMENT COMPRESSOR - A control valve according to an embodiment includes a body having a valve hole and a guiding passage formed coaxially with the valve hole, an actuating rod, slidably supported along the guiding passage, which is provided with a valve element, a solenoid for applying the solenoidal force in an opening or closing direction of a valve section to the valve element via the actuating rod, and a seal section, provided between the actuating rod and the guiding passage, which houses a sealing member for restricting the leakage of refrigerant from a high pressure side to a low pressure side. The actuating rod and the guiding passage are configured such that the clearance, between the actuating rod and the guiding passage, which is at a higher-pressure side of the seal section is larger than the clearance which is at a lower-pressure side of the seal section. | 10-24-2013 |
20120234931 | EXPANSION VALVE - An expansion valve is configured such that a shaft, a first valve, a second valve, a compression coil spring, and an adjustment screw are coaxially arranged within a body exactly below a power element, and the first valve and the second valve control the flow rate in an interlocked manner. A second valve seat of the second valve is press-fitted into the body, and an amount of press-fitting of the second valve seat into the body is adjusted such that when the first valve is in a closed state in which a first valve element is seated on a first valve seat, the second valve is in a closed state in which a second valve element is seated on the second valve seat. | 09-20-2012 |
20110259968 | METHOD OF FORMING THROTTLE PASSAGE, EXPANSION VALVE WITH THROTTLE PASSAGE, AND PIPE WITH THROTTLE PASSAGE - A throttle passage is formed by providing a step portion by expanding an open end side of a refrigerant passage of the refrigeration cycle, placing a throttle passage member on the step portion, and squashing the throttle passage member using a columnar squashing jig to widen a rim of the outer periphery, thereby causing the throttle passage member to be fixedly engaged to an inner wall of the refrigerant passage. The throttle passage member has a simple shape formed only by machining a circular plate having a hole formed in a center thereof into a truncated conical shape, and therefore can be made at low cost. Throttle passage member is only squashed to be fixedly engaged in the refrigerant passage, and therefore can be easily formed. | 10-27-2011 |
20080307812 | CONTROL VALVE FOR COMPRESSOR - To improve the pressure resistance strength of a pressure-sensing section of a control valve for a internal variable control compressor. In the control valve, a stack of snap-acting discs is disposed on a side of a diaphragm forming the pressure-sensing section opposite from a transmitting member. With this arrangement, even if the diaphragm receives large suction pressure Ps, since the snap-acting disc receives suction pressure Ps from the opposite side, the diaphragm is prevented from being broken or deformed. This makes it possible to improve the pressure resistance strength of the pressure-sensing section. As a result, even if the control valve is applied to a refrigeration cycle in which suction pressure Ps becomes high, such as one using carbon dioxide as refrigerant, it is possible to secure sufficient pressure resistance strength. | 12-18-2008 |
20080202157 | INTERNAL HEAT EXCHANGER FOR AUTOMOTIVE AIR CONDITIONER - An internal heat exchanger for an automotive air conditioner which is capable of securing length of the internal heat exchanger necessary for heat exchange by a double pipe even when an evaporator and an expansion valve are disposed where the distance to a partition wall is short. Between an expansion valve and evaporator, and a partition wall, a first double pipe is disposed which is formed by surrounding an inner pipe connected to an inlet port of the expansion valve with an outer pipe connected to an outlet port of the evaporator, and a second double pipe is disposed within an engine room which is formed by surrounding an inner pipe with an outer pipe, in a manner extended from the first double pipe. The first double pipe and the second double pipe are connected by a pipe connecting member such that the connecting portions of the pipes are prevented from disconnection. | 08-28-2008 |