公开(公告)号：US3817053A

公开(公告)日：1974-06-18

申请号：US30525872

申请日：1972-11-10

Applicant: CONTROLS CO OF AMERICA

Inventor： ORTH C

IPC: B60H1/32 ,  F16K31/68 ,  F25B41/04 ,  F25B41/06 ,  G05D23/12

CPC classification number: F25B41/062 ,  F25B41/043 ,  F25B2341/0683 ,  F25B2700/2117

Abstract: The compressor delivers hot compressed refrigerant to the condenser. Flow from the condenser to the evaporator is regulated by a thermostatic expansion valve having its sensing points (pressure and temperature) located in the compresser suction line downstream of an evaporator outlet control valve which is the new part in this application. This control valve has a piston type valve which is operated by a pilot valve actuated by the bellows in the suction line. The bellows is part of a charged system incorporating the capillary tube and the feeler bulb positioned in the evaporator fins. The charging fluid is selected to have a different thermal coefficient of expansion than the bulb so that the pilot valve will close at a selected temperature indicative of incipient icing conditions in the evaporator as may be found in air conditioning systems in which the compressor capacity can exceed the evaporator capacity (typical in automotive air conditioning). When the pilot valve closes pressure on the piston valve balances and the spring closes, the piston valve leaving a bleed port open to insure proper lubrication and cooling of the compressor.

Abstract translation: 压缩机将热压缩的制冷剂输送到冷凝器。 从冷凝器到蒸发器的流量由具有位于蒸发器出口控制阀下游的压缩机吸入管线中的感测点（压力和温度）的恒温膨胀阀来调节，这是本申请的新部分。 该控制阀具有活塞式阀，其由在吸入管线中的波纹管致动的先导阀操作。 波纹管是包含毛细管和位于蒸发器翅片中的探针灯的带电系统的一部分。 充气流体被选择为具有与灯泡不同的热膨胀系数，使得先导阀将在指示蒸发器中的初始结冰条件的选定温度下关闭，这可以在压缩机容量可超过的空调系统中找到 蒸发器容量（典型的汽车空调）。 当先导阀关闭活塞阀平衡上的压力并且弹簧关闭时，活塞阀离开放气孔以确保压缩机的适当的润滑和冷却。

公开(公告)号：US3810488A

公开(公告)日：1974-05-14

申请号：US30802972

申请日：1972-11-20

Applicant: CONTROLS CO OF AMERICA

Inventor： ORTH C ,  TREDER C ,  GRIFFOUL M

IPC: F16K17/10 ,  F25B41/04 ,  G05D16/10

CPC classification number: G05D16/106 ,  F16K17/105 ,  F25B41/043 ,  Y10T137/7766 ,  Y10T137/7767

Abstract: The interior of the bellows is sealed at atmospheric pressure so the pressure on the outside of the bellows is resisted by the atmospheric pressure within the bellows as well as by the spring. When the pressure on the outside of the bellows (which is evaporator pressure in a refrigeration system) exceeds a predetermined amount, the bellows tends to collapse and the head of the bellows pulls away from the actuating pin and allows the spring acting on the pilot valve to open the pilot valve whereupon the pressure to the right of the head of the piston is reduced, allowing the piston to move to the right against the return spring force and thus open the outlet by moving the end of the piston wall past the slot in the stationary sleeve. When the pressure falls below the desired amount, the bellows expands and moves the head of the bellows against the actuating pin to close the pilot valve. Flow through the bleed hole in the end of the piston to the pilot valve chamber rapidly raises the pressure therein so that the return spring can move the piston to close the outlet. Even with the outlet closed, the small port in the piston sleeve allows enough refrigerant flow to insure adequate flow to the compressor to keep the compressor lubricated. The bleed hole in the piston head is sized to require substantial opening of the pilot valve which, therefore, minimizes false opening of the main valve. Controlled leakage to the groove at the pilot end of the piston blocks flow from the pilot valve chamber to the main outlet and stabilizes valve operation.

Abstract translation: 波纹管的内部在大气压力下被密封，因此波纹管外部的压力受波纹管内的大气压力以及弹簧的抵抗。 当波纹管外部的压力（其是制冷系统中的蒸发器压力）超过预定量时，波纹管倾向于塌缩并且波纹管的头部从致动销拉开并允许弹簧作用在先导阀 以打开先导阀，因此活塞头部右侧的压力减小，允许活塞抵抗复位弹簧力向右移动，从而通过将活塞壁的端部移动通过狭槽而打开出口 固定套筒。 当压力低于所需量时，波纹管膨胀并将波纹管的头部靠在致动销上以关闭先导阀。 流过活塞末端的排放孔到先导阀室，迅速升高其中的压力，使得复位弹簧可以移动活塞以关闭出口。 即使出口关闭，活塞套筒中的小口允许足够的制冷剂流量来确保足够的流量到压缩机以保持压缩机润滑。 活塞头中的排放孔的尺寸设置成要求导阀的大量打开，因此导致主阀的假开口最小化。 在活塞块的先导端处对槽的受控泄漏从先导阀室流到主出口并稳定阀的操作。

公开(公告)号：US3822563A

公开(公告)日：1974-07-09

申请号：US35423473

申请日：1973-04-25

Applicant: CONTROLS CO OF AMERICA

Inventor： ORTH C

IPC: F16K31/68 ,  F25B41/04 ,  F25B41/06 ,  G05D23/02 ,  F25B41/00

CPC classification number: F25B41/062 ,  F25B41/043 ,  F25B2341/0683 ,  F25B2500/15

Abstract: The compressor provides hot refrigerant gas to the condenser and flow from the condenser to the evaporator is regulated by the thermostatic expansion valve, the sensing point of which is located in the return line betweeen the evaporator outlet and the wax element actuated suction line valve. A wax element actuated suction line valve is incorporated in the refrigeration system to respond to evaporator outlet temperature and thereby maintain evaporator temperature above a value which would permit frost accumulation on the evaporator. Since the evaporator temperature is controlled, the evaporator pressure is, to some lesser extent, controlled since the two are related. The wax element motor has an inherent temperature lag due to the thermal inertia of the wax and this tends to smooth out or stabilize the system and thus prevent or minimize hunting. The valve remains open as long as the temperature is above the set temperature regardless how low the pressure falls. This, then, enhances fast pulldown of the system. The wax element must be located completely upstream of the valve so as to be unaffected by refrigerant expansion as the valve throttles flow. Thus the wax element is located totally within the temperature to be sensed. In the principal embodiment the valve member is carried directly by the wax element housing and cooperates with the seat which also supports the spider or yoke supporting and guiding the wax element. Another variation incorporates a bellows assembly which functions to seal the wax element from the refrigerant and thus prevent any adverse effect on the elastomers normally incorporated in the wax element motor. In some cases there is no elastomer incorporated in the design with the bellows functioning to contain the wax medium while permitting flexure and, hence, operation of the valve.

Abstract translation: 压缩机向冷凝器提供热的制冷剂气体，并且从冷凝器到蒸发器的流动由恒温膨胀阀调节，恒温膨胀阀的感测点位于蒸发器出口和蜡元件致动吸入管路阀之间的返回管线中。 在制冷系统中并入蜡元件致动吸入管线阀，以响应于蒸发器出口温度，从而将蒸发器温度保持在允许蒸发器上积雪的值。 由于蒸发器温度受到控制，蒸发器压力在一定程度上受到控制，因为两者相关。 蜡元件电动机由于蜡的热惯性而具有固有的温度滞后，并且倾向于使系统平滑或稳定，从而防止或最小化打猎。 只要温度高于设定温度，阀门保持打开，无论压力如何下降。 这样可以增强系统的快速下拉功能。 蜡元件必须完全位于阀的上游，以便在阀节流流动时不受制冷剂膨胀的影响。 因此，蜡元件完全位于待感测的温度内。 在主要实施例中，阀构件由蜡元件壳体直接承载并与座椅配合，座椅还支撑支撑和引导蜡元件的支架和轭。 另一个变型包括波纹管组件，其用于将蜡元件与制冷剂密封起来，从而防止对通常结合在蜡元件电动机中的弹性体产生任何不利影响。 在某些情况下，在设计中不存在弹性体，其中波纹管用于容纳蜡介质，同时允许阀的弯曲和因此的操作。

公开(公告)号：US3810366A

公开(公告)日：1974-05-14

申请号：US27667672

申请日：1972-07-31

Applicant: CONTROLS CO OF AMERICA

Inventor： ORTH C

IPC: F25B1/00 ,  F25B41/04 ,  F25B41/06 ,  F25B43/00

CPC classification number: F25B43/003 ,  F25B41/043 ,  F25B41/062 ,  F25B2341/0683

Abstract: Each of the valves shown has parallel flow paths through the body with an expansion valve in the line leading to the evaporator thermostatically controlled by conditions in the return line. A second valve is positioned in the return line and controlled in response to a condition (temperature or pressure) which is indicative of conditions (temperature and pressure) in the evaporator. This arrangement prevents evaporator freezing. The valves are suited for flange fitting by reason of having all ports parallel enabling the valve to be secured to the evaporator (on one side) and to the compressor suction line and the condenser outlet on the other side. Since the thermostatic expansion valve can be ''''externally equalized'''' internally and all control functions are incorporated in the single body, the number of connections to be made by the system assembler are minimized. One version is provided with a receiver-drier which can be changed without disturbing other system connections.

Abstract translation: 所显示的每个阀具有平行的通过主体的流动通道，该通道具有在通向返回管路中的条件恒温控制的蒸发器中的膨胀阀。 第二阀定位在回流管线中，并且响应于指示蒸发器中的条件（温度和压力）的条件（温度或压力）而被控制。 这种布置防止蒸发器冷冻。 由于具有所有端口并联使得阀能够固定到蒸发器（一侧）和另一侧的压缩机吸入管路和冷凝器出口，所以这些阀适合于法兰装配。 由于恒温膨胀阀可以在内部进行“外部均衡”，并且所有的控制功能都被并入单体中，因此系统组装者的连接数将被最小化。 一个版本提供了一个接收干燥器，可以在不干扰其他系统连接的情况下进行更改。