公开(公告)号：US20070157648A1

公开(公告)日：2007-07-12

申请号：US11649923

申请日：2007-01-05

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： F25B49/00

CPC分类号： F04B27/1804 ,  F04B2027/1827 ,  F04B2027/1845 ,  F04B2027/185 ,  F04B2027/1854 ,  F04B2205/05

摘要： In a control valve for a variable displacement compressor, for controlling the discharge flow rate of refrigerant to be constant, to dispense with a check valve in a refrigerant outlet port of the compressor. The control valve includes a first control valve that controls the passage cross-sectional area of a refrigerant passage through which refrigerant passes from a discharge chamber of the compressor to a refrigerant outlet port thereof, and a second control valve that controls the flow rate of refrigerant allowed to flow from the discharge chamber to a crankcase such that a differential pressure (Pdh−Pdl) across the first control valve generated by the refrigerant passing therethrough becomes constant. The control valve is configured such that when a solenoid section is not energized, a first valve element is engaged with a piston to forcibly fully open the second control valve. The piston has an outer diameter equal to the inner diameter of a second valve seat, so that the discharge pressure Pdl on a refrigerant outlet port side is inhibited from adversely affecting the fully-opening operation of the second control valve, to thereby maintain the fully-closed state of the first control valve. This makes it possible to dispense with a check valve conventionally provided in the refrigerant outlet port.

摘要翻译： 在用于可变排量压缩机的控制阀中，用于控制制冷剂的排出流量恒定，从而在压缩机的制冷剂出口处省去止回阀。 控制阀包括：第一控制阀，其控制制冷剂通道的通道横截面积，制冷剂通道通过该制冷剂通道从压缩机的排出室流到其制冷剂出口;以及第二控制阀，其控制制冷剂的流量 允许从排出室流到曲轴箱，使得由通过其的制冷剂产生的第一控制阀两端的差压（Pdh-Pd1）恒定。 控制阀构造成使得当螺线管部分未通电时，第一阀元件与活塞接合以强制地完全打开第二控制阀。 活塞的外径等于第二阀座的内径，从而抑制制冷剂出口侧的排出压力Pd1不利地影响第二控制阀的完全打开操作，从而保持完全 闭合状态的第一个控制阀。 这使得可以省去通常设置在制冷剂出口中的止回阀。

公开(公告)号：US07047763B2

公开(公告)日：2006-05-23

申请号：US10935284

申请日：2004-09-08

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： F25B41/06

CPC分类号： F16K31/0655 ,  F16K31/0651 ,  F25B41/062 ,  F25B2341/065 ,  F25B2600/2505 ,  G05D16/2013 ,  Y02B30/72

摘要： To provide a constant differential pressure valve which is compact in size and can be realized at low cost.In the constant differential pressure valve according to the present invention, a pipe forming a body thereof not only accommodates internal structures, such as a differential pressure control mechanism, a movable core, and a fixed core, but also serves as part of piping of a refrigeration cycle. Further, a solenoid section including a solenoid coil is disposed outside the pipe in a manner surrounding the same. Therefore, substantial integration of the differential pressure control mechanism into the piping of the refrigeration cycle can be achieved, which makes the entire constant differential pressure valve very simple in construction. As a result, reduction of the size of the constant differential pressure valve and resultant reduction of material costs and manufacturing costs can be achieved, which makes it possible to achieve low costs of the constant differential pressure valve.

摘要翻译： 提供一种尺寸紧凑并且可以以低成本实现的恒定差压阀。 在本发明的恒压差压阀中，形成本体的管不仅容纳差压控制机构，可动铁芯，固定铁心等内部结构，而且还可以作为 制冷循环。 此外，包括螺线管线圈的螺线管部分以围绕其的方式设置在管道的外部。 因此，可以实现差压控制机构在制冷循环的配管中的大量集成，这使得整个恒压差压阀在结构上非常简单。 结果，可以实现恒定差压阀的尺寸的减小以及材料成本和制造成本的降低，这使得可以实现恒定差压阀的低成本。

公开(公告)号：US20050262873A1

公开(公告)日：2005-12-01

申请号：US11135466

申请日：2005-05-24

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： F25B1/00 ,  F25B9/00 ,  F25B40/00 ,  F25B41/04 ,  F25B41/06 ,  F25B43/00 ,  F25B43/02 ,  F25B49/02 ,  G01K13/00 ,  F25B41/00

CPC分类号： F25B41/04 ,  F25B9/008 ,  F25B40/00 ,  F25B43/006 ,  F25B2309/061 ,  F25B2400/16 ,  F25B2500/18 ,  F25B2600/2523

摘要： To provide a refrigeration cycle capable of improving the coefficient of performance without lowering the cooling power thereof. According to a refrigeration cycle of the present invention, it is possible to adjust the flow rate of liquid refrigerant to be mixed with gaseous refrigerant in a U-shaped pipe by a control valve integrally formed with an accumulator, and enhance the degree of dryness of refrigerant delivered from the accumulator while securing the required amount of lubricating oil. As a result, it is possible to increase the degree of superheat of refrigerant introduced into a compressor, thereby making it possible to improve the coefficient of performance of the refrigeration cycle. In doing this, there is no need to lower the pressure of refrigerant discharged from the compressor, and hence the improvement in the coefficient of performance can be realized without lowering the cooling power of the refrigeration cycle.

摘要翻译： 提供能够提高性能系数而不降低其冷却功率的制冷循环。 根据本发明的制冷循环，可以通过与蓄电池一体形成的控制阀来调节与U形管中的气态制冷剂混合的液体制冷剂的流量，并且提高干燥度 在确保所需量的润滑油的同时从蓄能器输送的制冷剂。 结果，可以增加引入压缩机的制冷剂的过热度，从而可以提高制冷循环的性能系数。 因此，不需要降低从压缩机排出的制冷剂的压力，能够在不降低制冷循环的冷却功率的情况下实现性能系数的提高。

公开(公告)号：US20050224740A1

公开(公告)日：2005-10-13

申请号：US11103534

申请日：2005-04-12

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： F16K31/06 ,  F16K1/00 ,  F25B41/06 ,  F16K31/02

CPC分类号： F25B41/062 ,  F16K31/0693 ,  F25B2341/065 ,  Y02B30/72 ,  Y10T137/7832

摘要： To provide a fluid control valve which is capable of preventing or suppressing degradation of the accuracy of flow rate control dependent on the lift amount of a valve element from a valve seat. An expansion valve is configured such that a valve portion and a valve portion integrally formed with a valve element move to and away from a valve seat and a valve seat, respectively, simultaneously. Further, the expansion valve is configured such that a flow passage cross-section formed by a gap between the valve portion and the valve seat, and a flow passage cross-section formed by a gap between the valve portion and the valve seat have approximately the same size when the expansion valve is open. As a result, it is possible to almost cancel the influence of changes in effective pressure-receiving areas acting on the respective valve elements when the expansion valve is open, on the pressure balance, thereby making it possible to prevent degradation of the accuracy of flow rate control dependent on the lift amount of the valve elements.

摘要翻译： 提供一种流体控制阀，其能够根据来自阀座的阀元件的提升量来防止或抑制流量控制的精度的劣化。 膨胀阀构造成使得与阀元件整体形成的阀部分和阀部分分别同时移动到阀座和阀座。 此外，膨胀阀构造成使得由阀部分和阀座之间的间隙形成的流动通道横截面以及由阀部分和阀座之间的间隙形成的流动通道横截面具有约 膨胀阀打开时尺寸相同。 结果，能够在压力平衡时几乎消除作用在各阀元件上的有效受压面积的变化对压力平衡的影响，从而可以防止流动精度的劣化 速率控制取决于阀元件的升程量。

公开(公告)号：US20050016208A1

公开(公告)日：2005-01-27

申请号：US10890319

申请日：2004-07-14

申请人： Hisatoshi Hirota ,  Michio Matsumoto

发明人： Hisatoshi Hirota ,  Michio Matsumoto

IPC分类号： F16K31/68 ,  F25B41/06 ,  F25B41/00

CPC分类号： F25B41/062 ,  F25B2341/0683

摘要： To provide an expansion valve having a low-pressure passage that is bent at right angles therein, which is reduced in untoward noise and noise of the flow of refrigerant generated when the refrigerant passes through the low-pressure passage. In an intersecting portion of a low-pressure passage, the axis of a port for introducing refrigerant returned from an evaporator, and the axis of a port for guiding out refrigerant having passed through a body block to a compressor are orthogonal to each other. A hole is formed in the body block in a direction of insertion of a shaft that transmits a driving force from a power element to a valve element, and a holder for holding the shaft. When holes coaxial with the ports, respectively, are formed by drills having the same diameter as that of the hole, the holes are formed in a manner such that the tip of one drill does not extend beyond the hole formed by the other drill, to make inner walls on an outer peripheral side along which refrigerant flows at an increased speed, smoothly continuous, without forming any recess or edge portion having a boundary portion with an angle equal to or smaller than a right angle.

摘要翻译： 提供一种具有在其中成直角弯曲的低压通道的膨胀阀，这降低了当制冷剂通过低压通道时产生的制冷剂流动的不利噪声和噪音。 在低压通路的交叉部分中，用于引导从蒸发器返回的制冷剂的端口的轴线和用于将通过体块的制冷剂引导到压缩机的端口的轴线彼此正交。 在主体块中沿着将来自动力元件的驱动力传递到阀元件的轴的插入方向和用于保持轴的保持器形成孔。 当与端口同轴的孔由具有与孔的直径相同的直径的钻头形成时，孔以这样的方式形成，使得一个钻头的尖端不延伸超过由另一钻头形成的孔， 使制冷剂在外周侧以增加的速度流动的内壁，平滑地连续，而不形成具有等于或小于直角的角度的边界部分的任何凹部或边缘部分。

公开(公告)号：US20050011221A1

公开(公告)日：2005-01-20

申请号：US10879359

申请日：2004-06-30

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： B60H1/32 ,  F04B27/18 ,  F04F5/04 ,  F04F5/46 ,  F04F5/48 ,  F25B1/00 ,  F25B27/00 ,  F25B41/00 ,  F25B41/04 ,  F25B41/06 ,  F25B43/00 ,  F25B49/02 ,  F25B1/06 ,  F25B49/00 ,  F28D5/00

CPC分类号： F04B27/1804 ,  B60H2001/3298 ,  F04F5/04 ,  F04F5/461 ,  F04F5/48 ,  F25B41/00 ,  F25B41/04 ,  F25B43/006 ,  F25B49/022 ,  F25B2309/06 ,  F25B2341/0012 ,  F25B2400/0407 ,  F25B2400/0409 ,  F25B2500/18 ,  F25B2500/19

摘要： The object of the present invention is to provide a refrigeration cycle for an automotive air conditioner, which is reduced in costs and uses an ejector. A variable displacement compressor driven by an engine for driving an automotive vehicle is used as a compressor, and the capacity of the compressor is controlled by a capacity control valve such that the differential pressure between discharge pressure and suction pressure of refrigerant becomes equal to a predetermined differential pressure determined by an external signal. Pressure substantially equal to pressure applied across the compressor is applied across the ejector, and therefore to control the differential pressure across the compressor is to control the differential pressure across the ejector. A differential pressure valve disposed between a gas-liquid separator and an evaporator is set to a differential pressure approximately proportional to the differential pressure across the ejector. A differential pressure set to the differential pressure valve is estimated from the differential pressure across the compressor which corresponds to the differential pressure across the ejector, and the differential pressure can be directly and accurately determined from the external signal for controlling the capacity control valve.

摘要翻译： 本发明的目的是提供一种用于汽车空调的制冷循环，其降低成本并使用喷射器。 使用由用于驱动机动车辆的发动机驱动的可变排量压缩机作为压缩机，并且压缩机的容量由容量控制阀控制，使得排出压力和制冷剂的吸入压力之间的压差等于预定的 差压由外部信号决定。 基本上等于施加在压缩机上的压力的压力跨越喷射器施加，因此控制压缩机两端的压差是控制喷射器两端的差压。 设置在气液分离器和蒸发器之间的差压阀被设定为与喷射器两端的差压大致成比例的差压。 根据对应于喷射器两端的压差的压缩机压差来估计设定在差压阀上的压差，并且可以根据用于控制容量控制阀的外部信号直接且精确地确定压差。

公开(公告)号：US06662581B2

公开(公告)日：2003-12-16

申请号：US10197970

申请日：2002-07-18

申请人： Hisatoshi Hirota ,  Tomokazu Nakazawa

发明人： Hisatoshi Hirota ,  Tomokazu Nakazawa

IPC分类号： F25B100

CPC分类号： F04B27/1804 ,  F04B2027/1827 ,  F04B2027/1831 ,  F04B2027/1854 ,  F25B9/008 ,  F25B2309/061

摘要： A displacement control valve that performs transition between operating capacities in a reduced time period. A valve element for introducing refrigerant from a discharge chamber into a pressure-regulating chamber after reducing discharge pressure Pd of the refrigerant to pressure Pc1, and a valve element for introducing refrigerant having pressure Pc2 from the pressure-regulating chamber into a suction chamber under suction pressure Ps are configured to open and close in an interlocked fashion, and a displacement control valve is comprised of the valve elements and a solenoid section that applies to a solenoid force corresponding to a predetermined differential pressure to these valve elements. When control to the minimum operating displacement is carried out, the valve element is fully opened, and the valve element is fully closed, while control to the maximum operating displacement is carried out, the valve element is fully closed, and the valve element is fully opened, whereby transmission between operating capacities is performed in a reduced time period.

摘要翻译： 一种位移控制阀，其在减少的时间段内执行操作容量之间的转换。 一种用于将制冷剂的排出压力Pd降低到压力Pc1后将制冷剂从排出室引入压力调节室的阀元件，以及用于将来自压力调节室的压力Pc2的制冷剂引入吸入室内的阀元件 压力Ps被构造成以互锁方式打开和关闭，并且位移控制阀由阀元件和螺线管部分构成，螺线管部分施加对应于这些阀元件的预定压差的螺线管力。 当进行最小操作位移的控制时，阀元件完全打开，并且阀元件完全关闭，同时执行到最大操作位移的控制，阀元件完全关闭，并且阀元件完全 打开，由此在减少的时间段内执行操作能力之间的传输。

公开(公告)号：US06612503B2

公开(公告)日：2003-09-02

申请号：US10263915

申请日：2002-10-03

申请人： Hisatoshi Hirota ,  Takeshi Kaneko

发明人： Hisatoshi Hirota ,  Takeshi Kaneko

IPC分类号： F25B4104

CPC分类号： F25B41/062 ,  F25B2341/0683 ,  F25B2700/191

摘要： The object of the present Invention is to provide an expansion valve including a pressure sensor which enables reduction of parts cost. A pressure sensor is screwed into an opening of a body block, which communicates with a space accommodating a valve element and a compression coil spring for urging the valve element toward a valve seat. A set value for an expansion valve is adjusted by changing the amount of screwing of the pressure sensor to thereby change the load of the compression coil spring. An adjusting screw for adjusting the set value for the expansion valve can be dispensed with, which makes it possible to reduce the manufacturing costs of the expansion valve.

公开(公告)号：US06484950B2

公开(公告)日：2002-11-26

申请号：US09992343

申请日：2001-11-06

申请人： Hisatoshi Hirota ,  Isao Sendo ,  Kuniharu Baba ,  Takeshi Kaneko

发明人： Hisatoshi Hirota ,  Isao Sendo ,  Kuniharu Baba ,  Takeshi Kaneko

IPC分类号： F25B4104

CPC分类号： F25B41/062 ,  F25B2400/05 ,  F25B2600/2513 ,  Y10T137/6011 ,  Y10T137/7504

摘要： To provide an expansion valve which permits both the assembling cost and the cost of parts to be effectively reduced by a large margin and thus is highly economical. A high-pressure refrigerant pipe, a valve casing and a low-pressure refrigerant pipe are previously formed integrally with an evaporator. At the time of assembling, an expansion valve unit having a minimum function to serve as an expansion valve is inserted into the valve casing and fixed thereto by a clip, and a distal end portion of a temperature sensing cylinder is fixed to an outlet pipe of the evaporator, thereby constructing an expansion valve. No special joints are required to connect the expansion valve unit to the high-pressure and low-pressure refrigerant pipes, and therefore, the cost of parts can be cut down. Also, since the valve casing into which the expansion valve unit is fitted is formed integrally with the high-pressure and low-pressure refrigerant pipes and the evaporator, no pipe connection is required, thus reducing the assembling cost.

公开(公告)号：US06305179B1

公开(公告)日：2001-10-23

申请号：US09564204

申请日：2000-05-04

申请人： Hisatoshi Hirota

发明人： Hisatoshi Hirota

IPC分类号： F25B4104

CPC分类号： F25B41/062 ,  F25B49/022 ,  F25B2341/0683

摘要： An expansion valve of a refrigerating cycle contains a compressor with variable capacity that hunts the flow of the refrigerant as soon as the expansion valve starts to open in a condition where the capacity of the compressor is varied. The variation of the cross-section of the passage of the refrigerant in the expansion over a selected amount of the moving stroke of a valve body of the expansion valve is less than the variation of the cross-section with another moving stroke amount of the valve body 53. The stroke section or stroke range with the reduced gradient of the variation of the cross-section extends between a position E in a fully closed state and a position F in a middle part of the opening stroke of the expansion.

摘要翻译： 制冷循环的膨胀阀包括具有可变容量的压缩机，一旦在压缩机的容量变化的状态下，一旦膨胀阀开始打开，就会追踪制冷剂的流动。 在膨胀阀的阀体的选定量的移动行程中膨胀的制冷剂的通道的横截面的变化小于与阀的另一移动行程量的横截面的变化 具有减小的横截面变化梯度的行程部分或行程范围在完全关闭状态下的位置E和膨胀的打开行程的中间部分中的位置F之间延伸。