公开(公告)号：US20050126191A1

公开(公告)日：2005-06-16

申请号：US10732497

申请日：2003-12-10

Applicant: Alexander Lifson ,  Michael Taras

Inventor： Alexander Lifson ,  Michael Taras

IPC: F25B49/00 ,  G01K13/00 ,  F25B45/00

CPC classification number: F25B49/005 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/2106

Abstract: A refrigerant system has a controller associated with it that determines an equilibrium pressure when the system is inactive. The controller determines if the equilibrium pressure differs from an expected equilibrium pressure corresponding to a current ambient temperature and the selected refrigerant type. When the difference exceeds a selected threshold, the controller determines that the amount of refrigerant within the circuit is below a desired level. In one example, the controller provides an indication of a low charge amount. The disclosed technique allows early detection of refrigerant charge loss and differentiation between loss-of-charge and other failure modes. Consequently, system performance is enhanced, component damage is prevented, service interruptions and maintenance are reduced, exhaustive troubleshooting is avoided and potential exposure to refrigerant substances is minimized.

Abstract translation: 制冷剂系统具有与其相关联的控制器，其在系统不活动时确定平衡压力。 控制器确定平衡压力是否与对应于当前环境温度和所选制冷剂类型的预期平衡压力不同。 当差值超过选择的阈值时，控制器确定电路内的制冷剂量低于期望水平。 在一个示例中，控制器提供低电荷量的指示。 所公开的技术允许早期检测制冷剂充量损失和充电损失和其他故障模式之间的区分。 因此，提高系统性能，防止部件损坏，减少维修中断和维护，避免了详尽的故障排除，并尽可能减少制冷剂物质的潜在暴露。

公开(公告)号：US06892553B1

公开(公告)日：2005-05-17

申请号：US10693593

申请日：2003-10-24

Applicant: Alexander Lifson ,  Thomas J. Dobmeier ,  Michael F. Taras

Inventor： Alexander Lifson ,  Thomas J. Dobmeier ,  Michael F. Taras

IPC: F25B13/00 ,  F25B41/04

CPC classification number: F25B41/046 ,  F25B13/00 ,  F25B41/062 ,  F25B2313/02742 ,  F25B2400/13 ,  F25B2500/18

Abstract: A refrigerant system is operable in either heating mode or cooling mode. The system is also provided with an economizer cycle that will function in either heating mode or cooling mode. A four-way valve assembly selectively communicates refrigerant from either an indoor heat exchanger or outdoor heat exchanger to an economizer heat exchanger. The valve assembly further includes a restriction for restricting a refrigerant flow downstream of the economizer heat exchanger. The valve assembly provides two distinct restrictions such that a different size restriction is presented to the flow in cooling and heating modes. In this way, a single valve assembly can provide both the required routing for the alternative heating and cooling modes, and at the same time allow for distinct restriction sizes for the two modes without the necessity of separate expansion devices, also improving overall system cost and reliability.

Abstract translation: 制冷剂系统可以在加热模式或冷却模式中操作。 该系统还具有将在加热模式或冷却模式下工作的节能循环。 四通阀组件选择性地将制冷剂从室内热交换器或室外热交换器传送到节能器热交换器。 阀组件还包括用于限制节能热交换器下游的制冷剂流的限制。 阀组件提供了两个不同的限制，使得在冷却和加热模式下对流动提供了不同的尺寸限制。 以这种方式，单个阀组件可以为替代的加热和冷却模式提供所需的路线，并且同时允许两种模式的不同的限制尺寸，而不需要单独的膨胀装置，也提高整体系统成本， 可靠性。

公开(公告)号：US20050086957A1

公开(公告)日：2005-04-28

申请号：US10695114

申请日：2003-10-28

Applicant: Alexander Lifson ,  Michael Taras

Inventor： Alexander Lifson ,  Michael Taras

IPC: F25B1/04 ,  F25B49/00 ,  F25B49/02 ,  F25B41/00

CPC classification number: F25B49/005 ,  F25B1/04 ,  F25B49/022 ,  F25B2400/13 ,  F25B2500/08 ,  F25B2600/0253 ,  F25B2600/0261 ,  F25B2600/2509 ,  F25B2700/15 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/2106 ,  F25B2700/21151 ,  Y02B30/741

Abstract: A refrigerant cycle is provided with a control that monitors system conditions such as current, voltage or temperature at a compressor motor or refrigerant state conditions at compressor ports. A protection switch on the motor is operable to stop operation of the compressor should a system condition exceed a predetermined maximum. The control monitors a system condition, and determines that the system condition indicates the protection switch may be actuated as the condition is moving toward the predetermined limit. Under such conditions, the control moves the compressor to a less loaded mode of operation such that it is less likely that the protection switch will actuate.

Abstract translation: 制冷剂循环设置有控制器，该控制器监视压缩机电动机或压缩机端口处的制冷剂状态条件下的系统条件，例如电流，电压或温度。 如果系统状态超过预定的最大值，则马达上的保护开关可操作以停止压缩机的运行。 控制器监视系统状况，并确定系统状态指示保护开关可能随着条件朝预定极限移动而被致动。 在这种条件下，控制器将压缩机移动到较小负载的操作模式，使得保护开关不太可能致动。

公开(公告)号：US20050086951A1

公开(公告)日：2005-04-28

申请号：US10695123

申请日：2003-10-28

Applicant: Thomas Dobmeier ,  Michael Taras ,  Alexander Lifson

Inventor： Thomas Dobmeier ,  Michael Taras ,  Alexander Lifson

IPC: F25B41/06 ,  F25B49/00 ,  F25B49/02

CPC classification number: F25B49/005 ,  F25B41/062 ,  F25B49/022 ,  F25B2500/222 ,  F25B2600/2513 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/2104 ,  F25B2700/2106

Abstract: An air conditioning or refrigeration system includes an expansion device that has a plurality of operating positions. When the expansion device is in a fully open position, the expansion device provides an indication to a system controller regarding that position. The controller responsively determines if the fully open position of the expansion device is caused by an undesirably low amount of refrigerant charge in the system. In one example, the controller rules out other possible reasons for the expansion device being in the fully open position. In one example, the controller automatically shuts down appropriate portions of the system to avoid any component damage that may result from having too low refrigerant amount in the system.

Abstract translation: 空调或制冷系统包括具有多个操作位置的膨胀装置。 当膨胀装置处于完全打开位置时，膨胀装置向系统控制器提供关于该位置的指示。 控制器响应地确定膨胀装置的完全打开位置是否由系统中不希望的低量的制冷剂充注引起。 在一个示例中，控制器排除扩展设备处于完全打开位置的其他可能的原因。 在一个示例中，控制器自动关闭系统的适当部分，以避免可能由于系统中制冷剂量太低而导致的任何部件损坏。

公开(公告)号：US06474087B1

公开(公告)日：2002-11-05

申请号：US09969330

申请日：2001-10-03

Applicant: Alexander Lifson

Inventor： Alexander Lifson

IPC: F25B4100

CPC classification number: F04C29/0014 ,  F04C18/0215 ,  F04C23/008 ,  F25B41/04 ,  F25B41/043 ,  F25B2400/13 ,  F25B2600/2509 ,  F25B2700/1931 ,  F25B2700/1933 ,  F25B2700/21151 ,  F25B2700/21152

Abstract: The economizer flow to the intermediate compression chamber inside a compressor is controlled via a variable restriction. The size of the restriction is selected to optimize unit performance in relation to operating conditions.

Abstract translation: 流经压缩机内的中间压缩室的节能器通过可变限制来控制。 选择限制的大小以优化与操作条件相关的单元性能。

公开(公告)号：US06238188B1

公开(公告)日：2001-05-29

申请号：US09211958

申请日：1998-12-15

Applicant: Alexander Lifson

Inventor： Alexander Lifson

IPC: F04B4900

CPC classification number: F04C28/08 ,  F04C18/0215 ,  F04C28/28 ,  F04C2270/015

Abstract: A method is presented to prevent compressor damage by reducing compressor load when operating speed either is too low or too high as can be the case at extremes of line frequency and voltage. The speed of the compressor is deduced from the knowledge of compressor load, frequency and voltage. If the compressor speed is too high or too low for a given suction and discharge pressure, the compressor load is reduced to boost the operating speed or to reduce force acting on the bearings. The compressor load reduction may be achieved by actuating an unloader valve, a suction throttling device, or some other load reduction mechanism.

Abstract translation: 提出了一种方法，以防止在运行速度太低或太高时通过降低压缩机负载来抑制压缩机损坏，如在极端频率和电压下的情况。 从压缩机负载，频率和电压的知识推导出压缩机的速度。 如果对于给定的吸入和排出压力，压缩机转速太高或太低，则减小压缩机负载以提高操作速度或减小作用在轴承上的力。 可以通过致动卸载阀，抽吸节流装置或一些其它负载减小机构来实现压缩机负载减小。

公开(公告)号：US5873711A

公开(公告)日：1999-02-23

申请号：US56476

申请日：1998-04-07

Applicant: Alexander Lifson

Inventor： Alexander Lifson

IPC: F04C18/02 ,  F04C27/00 ,  F04C18/04

CPC classification number: F04C18/0284 ,  F04C27/005

Abstract: A scroll compressor has structure in the tips of at least one of its wraps that reduces a force separating the scroll wraps. In one embodiment, the structure includes recesses formed in the tip such that low pressure fluid is tapped across the surface between the tip and the opposed scroll base. The low pressure fluid reduces the separating force between the scroll wrap. Separating walls may be formed to define separate recesses. In a second embodiment, an intermediate pressure fluid is tapped into a groove. Again, the low pressure reduces the separating force component across the scroll wrap. This invention is particularly valuable in the type of scroll wraps having thick wraps.

Abstract translation: 涡旋式压缩机在其至少一个涡卷机的末端具有减小分离涡卷的力的结构。 在一个实施例中，该结构包括形成在尖端中的凹槽，使得低压流体跨过尖端和相对的涡旋底座之间的表面。 低压流体减少了涡卷之间的分离力。 可以形成分隔壁以限定单独的凹部。 在第二实施例中，将中压流体挖入槽中。 再一次，低压减小了卷绕涡卷上的分离力分量。 本发明在具有厚包装的涡卷包装的类型中特别有价值。

公开(公告)号：US5762483A

公开(公告)日：1998-06-09

申请号：US789933

申请日：1997-01-28

Applicant: Alexander Lifson ,  James W. Bush

Inventor： Alexander Lifson ,  James W. Bush

IPC: F04C18/02 ,  F04C27/00 ,  F01C1/04 ,  F04C18/04

CPC classification number: F04C27/005 ,  F04C18/0261 ,  F04C18/0292

Abstract: An improved control over the pressure vented or tapped to a back pressure chamber in a scroll compressor is achieved by maintaining a vent hole closed for the majority of the operational cycle of the scroll compressor. The hole is preferably selectively exposed to a discharge pressure for a small portion of the cycle, and to an intermediate pressure for a second small portion of the cycle. Other than those two small portions, the hole is preferably closed. The invention reduces pulsation in the back pressure chamber and also reduces pumping losses caused by fluid moving into and out of the back pressure chamber through the hole. In one embodiment, grooves are formed in the fixed scroll member to communicate a selected intermediate pressure and a discharge pressure to locations on the base plate of the fixed scroll member. A vent hole in the wrap of the orbiting scroll member cyclically moves over the two grooves. The vent hole is closed by the base plate of the fixed scroll member for the majority of its operational cycle. In a second embodiment, a pair of holes are formed through the base plate of one of the scroll members. The holes are covered by the wrap of the other scroll member for the majority of the operational cycle of the scroll compressor. Each hole is open for a small portion of the operational cycle to selectively tap an intermediate and discharge pressure to the back pressure chamber.

公开(公告)号：US10006681B2

公开(公告)日：2018-06-26

申请号：US12447728

申请日：2006-12-26

Applicant: Alexander Lifson ,  Michael F. Taras

Inventor： Alexander Lifson ,  Michael F. Taras

IPC: F25B49/02 ,  F25B41/04

CPC classification number: F25B41/043 ,  F25B2600/0261 ,  F25B2600/2521

Abstract: A pulse width modulation control is provided for a suction valve located on a suction line. When the flow rate through a refrigerant system needs to be reduced, the suction valve is rapidly cycled from an open position to a closed position. A bypass line connecting compressor discharge to compressor suction with a bypass valve and a discharge valve positioned on the discharge side of the compressor are also provided. When the control closes the suction valve, it also closes the discharge valve to prevent the refrigerant to backflow into the bypass line, and, at the same time, the control opens the bypass valve. Opening of the bypass valve reduces discharge pressure, leading to reduction in compressor power consumption and subsequent operating efficiency gain.

公开(公告)号：US09995516B2

公开(公告)日：2018-06-12

申请号：US12161700

申请日：2006-05-26

Applicant: Alexander Lifson ,  Michael F. Taras ,  Richard Lord

Inventor： Alexander Lifson ,  Michael F. Taras ,  Richard Lord

IPC: F25B1/00 ,  F25B31/00 ,  F25B49/02 ,  F25B41/04

CPC classification number: F25B49/02 ,  F25B31/006 ,  F25B41/043 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2700/2115 ,  F25B2700/21151 ,  F25B2700/21175

Abstract: A superheat control utilizes a sensor at a location downstream of an evaporator after some heat is delivered to the refrigerant. In one embodiment, the compressor is a sealed compressor with at least a portion of the refrigerant being heated by an electric motor. The temperature is sensed after the refrigerant temperature has increased after passing over the electric motor. In another embodiment, the refrigerant temperature is measured after some minimal compression and minimal temperature rise has occurred within the compressor pumping elements. In either case, by measuring the temperature of the refrigerant after some additional heat has been added to the refrigerant, the refrigerant super-heat leaving the evaporator can be controlled to a lower value. The improved superheat control enhances the system performance by increasing system efficiency, system capacity and improving oil return to the compressor.