The present invention refers to a system and method for checking the operational status of alternative compressor valve and more particularly for checking operational status of electrically commanded valves, provided in alternative compressors used in refrigeration systems. In accordance with the present invention, said operational checking system of alternative compressor valve comprises a data processing core (5) capable of estimating one among two possible operations statuses of said metal valve (1) by varying at least one electric parameter provided by said sensor (4), wherein said step of estimating one among two possible operational statuses of said metal valve (1) is effected on the basis of the results from the comparison between said signal of electric parameter from sensor (4) and the predetermined range of data analogous to the electric parameter.

Reciprocating-type compressor for refrigeration and/or conditioning and/or heat pump systems, comprisinga casing in which there is defined at least one compression section comprising at least one cylinder and a corresponding compression piston, a head provided on said casing, defining a delivery chamber immediately down-stream of said compression section, and adapted to receive the compressed fluid from said compression section, an intake zone from where the fluid to be compressed in the at least one cylinder of said compression section is introduced, a delivery tap at the operational outlet of said compression chamber, characterized in that it comprises a check valve placed between said operational outlet of said compression chamber and said delivery tap, adapted to prevent the return of fluid into the compression chamber from said delivery tap.

Provided is a valve module that includes a movable member and a support member. The movable member is constituted by a film elastically deformable by a fluid and having a first surface positioned on a side of a member having an opening through which the fluid passes and a second surface on a side opposite to the first surface. The support member has higher rigidity than rigidity of the movable member, covers a part of a region of the second surface, in which the opening is not located as viewed in a direction perpendicular to the second surface, and is fixed to the member.

A reciprocating compressor for a cooling device provided with a closed circuit (C) having a main branch (M), in which a first flow rate (X) of circulating coolant enters in the compressor, and a first economizer branch, or secondary branch (E), in which a second flow rate (X1) of coolant circulates under a pressure different from the pressure of the first flow rate (X) of coolant, the compressor being provided with a cylinder and a piston reciprocatingly moving in the cylinder, between a top dead center (S) and a bottom dead center (I), and having a suction duct for the entrance of the first flow rate of coolant, and a port obtained in the wall of the cylinder for the entrance of the second flow rate of coolant, in such a way that the piston exposes at least in part the first inlet port, at least during its inlet stroke, and covers the port at least during its compression stroke, wherein the first inlet port has a slit shape with the main dimension substantially transverse to the axis (A) of the cylinder.

A device for conserving power is provided in a piston compressor, in particular a piston-compressor for generating compressed air in a motor vehicle and having a piston delimiting a compression chamber for generating compressed air, which, originating from the ambient environment, arrives in the compression chamber for compression by way of at least one suction connection formed on a cylinder head cover and an intake valve array arranged on a valve plate. For the purpose of conserving power, a pressure-dependently acting idling device is provided for the intake valve array having a dedicated suction lamella, which can be rotated by an actuator between a working position overlapping at least one suction opening and an idling position unblocking, at least in part, the at least one suction opening. The actuator actuates the suction lamella in a coordinated manner such that in the idling position, the suction lamella unblocks the at least one suction opening in the valve plate, at least partially, while simultaneously blocking adjacent pressure valve cross-sections, at least partially, and locks the suction connection at the cylinder head cover by a slider in order to form an increased dead space in the area of the cylinder head.

A reed valve module includes a module body and a reed petal. The module body includes a seating surface located on a first side of the module body and a sealing face located on a second side the module body. The reed petal is positioned adjacent to the second side of the module body and adapted to seal against the sealing face when the reed petal is in a closed position, wherein the reed valve module is a self-contained modular unit that is adapted to be inserted into a receiving cavity of a modular reed valve assembly such that the seating surface is positioned adjacent to a retaining surface of the modular reed valve assembly and an interfacing surface of the reed valve module is positioned adjacent to a second retaining surface of the modular reed valve assembly, and wherein the reed valve module is adapted to be captured and retained within the modular reed valve assembly between the first and second retaining surfaces.

A wellbore tool includes a cooling section positioned within the tool for the purpose of maintaining the temperature sensitive components within their rated operating temperature range. The cooling section includes an evaporator, compressor, condenser, power device, expansion device. The compressor is positioned within the condenser. The components whose temperatures are to be maintained are in thermal contact to the evaporator. The cooling process is based upon the vapor compression cycle.

The present invention relates to the compressors technological field used preferentially in cooling systems. Problem to be solved: Difficulty in detecting improper opening of the high pressure suction valve in multiple suction reciprocating compressor and, in more severe cases, interrupts operation of low pressure line(s). Problem resolution: Implementation of method which monitors at least one variable proportional to electrical engine torque, and based on detection of at least on positive peak of said variable proportional to torque of said electrical engine, identify and/or detectsin real timeimproper opening of the valve.

A reciprocating compressor includes a cylinder that defines an inner space, a piston that is located in the inner space of the cylinder and that defines a compression space configured to receive refrigerant, a discharge cover that is coupled to a side of the cylinder and that defines a discharge space configured to receive refrigerant discharged from the compression space, and a valve plate that is located at a side space defined at the side of the cylinder and that partitions the side space into the compression space and the discharge space. The valve plate defines a discharge hole through which the compression space and the discharge space communicate with each other, in which the discharge hole includes an inlet that faces the compression space and an outlet that faces the discharge space. The inlet and the outlet have different shapes.

A compressor may include a shell, a non-orbiting scroll, an orbiting scroll, and a discharge valve member. The shell may define a discharge chamber. The non-orbiting scroll may be disposed within the discharge chamber and includes a first end plate and a first spiral wrap extending from the first end plate. The orbiting scroll may be disposed within the discharge chamber and includes a second end plate and a second spiral wrap extending from the second end plate. The first and second spiral wraps mesh with each other to define fluid pockets therebetween. The second end plate includes a discharge passage extending therethrough. The discharge valve member may be attached to the second end plate and may be movable between an open position allowing fluid flow from the discharge passage to the discharge chamber and a closed position restricting fluid flow from the discharge passage to the discharge chamber.