摘要:
In a vehicle air conditioner with a heat pump cycle having an interior heat exchanger and an exterior heat exchanger, when a frosting on a surface of the exterior heat exchanger is determined and when a temperature of hot water supplied to a heater core is equal to or higher than a predetermined temperature, the exterior heat exchanger is defrosted in a defrosting operation. Accordingly, the defrosting operation can be performed while a sufficient heating can be obtained.
摘要:
A pressure control valve controlling the temperature and pressure at the outlet side of a heat emitter so as to enable efficient operation by a CO.sub.2 system operating at the super critical region, wherein CO.sub.2 is sealed in a closed space at one side of a diaphragm moving the valve element at a density of approximately 600 kg/m.sup.3, a through member made of a material with a high heat conductivity is provided extending between the inside and outside of the closed space, and step differences are eliminated at the contact surfaces to improve the durability of the diaphragm.
摘要翻译:控制发热体出口侧的温度和压力的压力控制阀,以便能够通过在超临界区域运行的CO 2系统进行有效的操作,其中CO 2密封在隔膜的一侧的封闭空间中, 密封约600kg / m 3的阀元件,由导热性高的材料构成的贯通构件设置在封闭空间的内部和外部之间延伸,并且在接触表面处消除步进差异以提高耐久性 的隔膜。
摘要:
An expansion valve for a refrigerating cycle, in which the body dimensions and the weight of the whole valve can be reduced and a reduction in cost can be achieved. An expansion valve of the invention comprising a temperature-sensing portion arranged in a refrigerant passage leading to an evaporator from a gas cooler or an internal heat exchanger in a vapor compression type refrigerating cycle and varied in internal pressure according to a refrigerant temperature at an outlet side of the gas cooler or on an outlet side of the internal heat exchanger, a valve member that mechanically interlocks with a change in internal pressure of the temperature-sensing portion to adjust an opening degree of a valve port, and a body that accommodates therein the valve member, and wherein the body is provided with a flow passage, through which a refrigerant reduced in pressure by the valve member is led to the evaporator while a refrigerant temperature at the outlet side of the gas cooler or on the outlet side of the internal heat exchanger is transmitted to the temperature-sensing portion. Also, that density, at which a refrigerant is charged in a temperature-sensing body, is set in the range of about 200 kg/m3 to about 600 kg/m3. Further, a ratio of a temperature-sensing cylinder corresponding portion to the temperature-sensing body is made at least 60%.
摘要翻译:一种用于制冷循环的膨胀阀,其中可以减小主体尺寸和整个阀的重量并降低成本。 本发明的膨胀阀包括温度感测部分,其布置在通过蒸汽压缩型制冷循环中的气体冷却器或内部热交换器通向蒸发器的制冷剂通道中,并根据出口处的制冷剂温度而变化内部压力 气体冷却器的一侧或内部热交换器的出口侧,阀构件,其与温度感测部的内部压力的变化机械地联锁以调节阀口的开度,以及容纳在其中的主体 阀构件,并且其中主体设置有流动通道,通过该流动通道将由阀构件减压的制冷剂引导到蒸发器,同时在气体冷却器的出口侧处的制冷剂温度或在气体冷却器的出口侧 内部热交换器被传送到温度感测部分。 此外,将制冷剂在感温体内充电的密度设定在约200kg / m 3〜约600kg / m 3以下的范围内 >。 此外,温度感测筒对应部分与温度检测体的比率至少为60%。
摘要:
An air-conditioner includes a compressor, a radiator, an evaporator, an ejector, and a separator. The compressor compresses refrigerant and variably controls an amount of the refrigerant. The radiator cools high-pressure refrigerant. The evaporator cools air blowing into a passenger compartment of a vehicle. The ejector having a nozzle jets the refrigerant at high speed. The separator separates the refrigerant into gas refrigerant and liquid refrigerant. An opening degree of a throttle of the nozzle in the ejector becomes larger so as to increase a cooling performance of the air-conditioner when the amount of the refrigerant discharged from the compressor is smaller than a maximum amount of the refrigerant.
摘要:
A pressure control valve, which has a main valve for control, capable of opening and closing a valve hole by means of a diaphragm, and controls the pressure of a fluid by the agency of the main valve for control, comprises a non-return auxiliary valve located around the main valve for control so as to be coaxial therewith. The non-return auxiliary valve includes a cylindrical portion to be guided by a valve guard body having the valve hole therein and an annular rib extending outward from one end of the cylindrical portion. The rib can engage an auxiliary-valve seat on an outlet-side case.
摘要:
In a refrigerating cycle, a heat radiation of a gas cooler is reduced by a heat radiation reduction member when one of a pressure and a temperature of a high pressure side refrigerant is equal to or less than a predetermined value. When a discharge pressure of the refrigerant discharged from a compressor is equal to or lower than the predetermined level, the heat radiation of the gas cooler is reduced by the heat radiation reduction member. Thus, the refrigerant pressure of the high pressure side is increased while the refrigerant pressure of a low pressure side is decreased. With this, a flow rate at a high pressure inlet of an ejector is increased. Also, a flow rate at a low pressure inlet of the ejector is increased. Accordingly, a temperature of air blown from an evaporator is decreased without frosting the evaporator even when a load of the cycle is low.
摘要:
A pipe joint for the refrigeration cycle is disclosed. A female joint (20) has a fitting recess (24), and a male join (10) has a fitting protrusion (14) and a stepped portion (13). In the male joint (10) and the female joint (20), a backup ring (30) and an O-ring (31) are fitted adjacently to each other in the stepped portion. The fitting protrusion (14), the backup ring (30) and the O-ring (31) are fitted in a fitting recess (24). The O-ring (31) is formed of an elastic material having a high blister resistance to carbon dioxide refrigerant. The backup ring (30) is formed of a resin material having a smaller permeability coefficient than the O-ring (31) against the carbon dioxide refrigerant and plastically deformable under the pressure of the refrigerant imposed on the O-ring (31). The refrigerant leakage amount can thus be minimized.
摘要:
The front end portion of a fitting projection from the portion on which a backup ring is mounted to the front end, has a diameter smaller than the inner diameter of the backup ring. The backup ring is endless in the circumferential direction thereof. A bias cut of the backup ring is not required when the backup ring is fitted on the fitting projection and, accordingly, the endless backup ring which continuously extends in a circumferential direction can be used. Therefore, the backup ring can also function as a sealing member and, thus, the refrigeration cycle pipe joint having the excellent refrigerant sealing property can be obtained. Consequently, a necessary amount of a refrigerant can be reduced because the amount of a refrigerant which permeates to the atmosphere is reduced, and the size of a receiver or an accumulator, having a refrigerant storing function, can be reduced.
摘要:
A temperature sensing portion of a control valve main body is located in a first refrigerant passage for communicating an outlet side of a radiator with an inlet side of an internal heat exchanger, and a second refrigerant passage for introducing the refrigerant flowing from the internal heat exchanger to an upstream side of a valve port in a refrigerant flow is formed in a casing main body. Accordingly, since it is possible to reduce a delay of temperature change in a sealed space (control chamber) with respect to refrigerant temperature change at the outlet side of the radiator, a temperature response characteristic of the pressure control valve is improved. Further, since it is not necessary to separately assemble a capillary tube, a temperature sensing cylinder or the like to the outlet side of the radiator, it is possible to reduce the number of processes for assembling the CO2 cycle and to attempt to reduce a manufacturing prime cost.
摘要:
A refrigeration cycle controls a second evaporator while a first evaporator is operating. The refrigeration cycle of the present invention makes a differential pressure between an inlet refrigerant pressure and an outlet refrigerant pressure of a second evaporator solenoid valve when starting or stopping the second evaporator during operation of the first evaporator smaller than the differential pressure when operating only the first evaporator, then opening or closing the second evaporator solenoid valve.