Abstract: An electric valve, includes a valve seat, a valve needle, a first and a second valve cores the first valve core is provided with a first through hole, the material of the first valve core is a non-metallic material, and the first valve core is located between the valve needle and the opening of the valve cavity; the second valve core is provided with a second through hole, the material of the second valve core is metal material, the second valve core is adjacent to the side of the first valve core that faces the valve needle, and the second through hole and the first through hole jointly form a valve port; and when the electric valve is in a fully closed state, the valve needle passes through the second through hole and makes contact with the hole wall of the first through hole to form a seal.

Abstract: Provided is a valve assembly. The valve assembly includes a valve seat assembly, a valve needle assembly, and a sealing structure, where an end of the valve seat assembly is provided with a valve port; an inner circle of the sealing structure becomes a sealing ring line in sealing fit with the valve needle assembly, or an outer circle of the sealing structure becomes a sealing ring line in sealing fit with the valve seat assembly; and a diameter of the sealing ring line is less than a maximum diameter of an annular sealing portion between the valve needle assembly and the valve port. An electronic expansion valve using the valve assembly is further provided.

Abstract: A valve device is provided, including a valve body unit and a valve seat. The valve seat is provided with a mounting cavity, and an end of the valve body unit is mounted in the mounting cavity. The valve device further includes a limiting unit, an outer side wall of the valve seat is provided with a mounting hole in communication with the mounting cavity along a radial direction of the mounting cavity, a side wall of the mounting cavity is recessed to form a mounting groove corresponding to the mounting hole, an end of the limiting unit extends into the mounting cavity from the mounting hole and is inserted into the mounting groove, and the limiting unit that extends into the mounting cavity abuts against the valve body unit to perform limiting along an axial direction and a circumferential direction between the valve body unit and the valve seat.

Abstract: A valve device is provided. The valve device includes a valve body unit, a mounting seat and a valve seat. The valve device further includes a fastening member. The mounting seat is provided with a limiting step, and a side surface of the valve seat is provided with a connecting hole in communication with the mounting hole along a direction perpendicular to an axis of the mounting hole. And an end of the fastening member extends into the mounting hole from the connecting hole and abuts against the limiting step.

Abstract: A surface inspection system can be provided with a laser spot size or a laser line width that is selectable based on a measurable aspect of the objects under test that project upward or downward from a surface under test. The larger laser spot size or line width can be selected to cover a larger area of the surface under test at a time, which can increase scanning speed over the surface under test and enhance system measurement throughput.

Abstract: Disclosed are a combined four-way valve, an air conditioning system, and a vehicle. The combined four-way valve includes a valve seat, a first control valve, a second control valve, a third control valve and a fourth control valve, where the valve seat is internally provided with an input port, an output port, a first opening, a second opening, and a plurality of valve cavities which are arranged at intervals and are arranged corresponding to the control valves on a one-to-one correspondence manner; the plurality of valve cavities include a first valve cavity, a second valve cavity, a third valve cavity and a fourth valve cavity; the valve cavities are in communication with one another by channels; the valve cavities are provided with inlets and outlets, and are in communication with flow channels in the valve seat.

Abstract: The present disclosure provides an electric valve, including: a valve seat, the valve seat having an end surface and a slot; a valve body, a portion of the valve body penetrating in the valve seat, and another portion of the valve body protruding from the end surface; a coil portion sleeved over the valve body, the coil portion and the slot being respectively located on two sides of the end surface; and a connection portion, the connection portion including a connection member and a support member and a clamping member arranged on the connection member. The connection member is fixedly connected to the coil portion, the support member abuts against the end surface, and the clamping member is clamped with the slot.

Abstract: An electronic expansion valve, including: a valve seat (10); a valve core sleeve (90) fixed together with the valve seat by welding to form a welded structure; and a mounting base body (100) provided with a second mounting channel, both the valve seat and the valve core sleeve being mounted in the second mounting channel, wherein an outer wall of the valve seat or the valve core sleeve is provided with an avoidance space to avoid the welded structure, or an inner wall of the mounting base body is provided with an avoidance space to avoid the welded structure. The electronic expansion valve can solve the technical problem in the related art that it is inconvenient to mount the valve seat on the mounting base body.

Abstract: Disclosed herein are techniques to reduce blurring in images taken during semiconductor inspection. A stage, which holds a substrate for inspection, can move at a substantially constant speed during inspection to increase throughput. In some techniques, a mirror system can be added to the camera system for reducing blur in images. The mirror system can include a rotating or dithering mirror to translate the linear motion of the stage into a counter rotational motion in the form of deflecting beam angles thereby reducing the motion blur caused by the movement of the stage.

Abstract: Some embodiments of the present disclosure provide an electromagnetic valve. The electromagnetic valve includes: a valve cover and a valve core, the valve core being installed in the valve cover; a first sealing structure and a sealing sleeve, the sealing sleeve being installed at one end of the valve cover, and the first sealing structure being arranged at an end of the sealing sleeve close to the valve cover and forms a valve port; and a driving assembly, the driving assembly driving the valve core to move along an axial direction to open or close the valve port, there is a hardness difference between a part matched with the valve core on the first sealing structure and the valve core. The present disclosure solves the problem of medium leakage at the valve port easily occurring when a valve core blocks a valve port in the art known to inventors.

Abstract: Various examples include an apparatus to characterize substrate and film thicknesses of the substrate and films formed thereon. The apparatus uses one or more wavelengths of light from a light source (e.g., a swept laser) to interrogate the substrate. The light is directed substantially orthogonally to an upper surface of the substrate. A polarizer and an analyzer element are coupled between the light source and the substrate. Therefore, the polarizer and the analyzer are both located in the beam propagation path from the light source to the substrate. An optical detector is arranged substantially orthogonally to the upper surface of the substrate. The optical detector receives light returned back from the substrate. The apparatus is capable of determining the thickness of the substrate and one or more films contained thereon, regardless of substrates having optical anisotropies, such as chiral characteristics or stress-induced films. Other apparatuses and methods are also disclosed.

Abstract: An electronic expansion valve, including: a valve seat and a valve needle, the valve needle being mounted in the valve seat; a valve core provided at one end of the valve seat, the valve core being provided with a valve port; a drive assembly, which drives the valve needle to move axially to open or close the valve port; and a spring sleeve, a spring, and a screw, the spring being mounted in the spring sleeve, the screw being movably mounted at one end of the spring sleeve, the valve needle being provided with a positioning step, and the other end of the spring sleeve being sleeved at the positioning step to position the other end of the spring sleeve by means of the positioning step. The electronic expansion valve can solve the technical problem in the related art of the spring sleeve being prone to inclination during mounting.

Abstract: An electronic expansion valve, including: a valve seat, wherein the valve seat is provided with a first mounting channel extending in an axial direction, and a valve port is provided in the first mounting channel; a valve needle, which is movably mounted in the first mounting channel to block or avoid of the valve port, wherein a mounting gap is provided between a wall surface of the first mounting channel and an outer wall of the valve needle; and a first sealing piece, which is mounted on the valve needle, wherein the first sealing piece is located in the mounting gap, so as to seal the mounting gap by means of the first sealing piece. The electronic expansion valve can solve the technical problems in the related art of poor sealing performance of an electronic expansion valve and a valve needle being prone to moving.

Abstract: Some embodiments of this application provides a reversing valve and a heat exchange system having the same. The reversing valve includes: a valve seat having a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel; a first valve body controlling communication between the first flow channel and the third flow channel; a second valve body controlling communication between the first flow channel and the fourth flow channel; a third valve body controlling communication between the third flow channel and the second flow channel. When the reversing valve is in a first operation state, the second valve body controls the first flow channel to communicate with the fourth flow channel. When the reversing valve is in a second operation state, the first valve body controls the first flow channel to communicate with the third flow channel.

Abstract: Disclosed are a combined four-way valve, an air conditioning system, and a vehicle. The combined four-way valve includes a valve seat, a first control valve, a second control valve, a third control valve and a fourth control valve, where the valve seat is internally provided with an input port, an output port, a first opening, a second opening, and a plurality of valve cavities which are arranged at intervals and are arranged corresponding to the control valves on a one-to-one correspondence manner; the plurality of valve cavities include a first valve cavity, a second valve cavity, a third valve cavity and a fourth valve cavity; the valve cavities are in communication with one another by channels; the valve cavities are provided with inlets and outlets, and are in communication with flow channels in the valve seat.

Abstract: A one-way valve and a valve terminal. The one-way valve includes: a plugging portion, which is provided with a flow cavity and a flow port communicating with the flow cavity; a valve body, which is connected with the plugging portion, wherein the valve body is provided with an overflow hole and a valve port communicating with the overflow hole; a piston portion, which includes a piston head, a piston shaft and a limiting cap, which are connected in sequence, wherein the piston shaft passes through the valve body, the limiting cap is located inside the flow cavity, and the piston head is movably disposed to plug or open the valve port; and an elastic member, which is disposed inside the flow cavity, wherein one end of the elastic member abuts against the valve body, and the other end of the elastic member abuts against the limiting cap.

Abstract: Disclosed is a stator assembly, including: a housing, wherein the housing has an accommodating cavity, and a bottom surface of the housing is provided with an accommodating groove; a stator, disposed at a bottom of the housing, wherein a middle of the stator is of a hollow structure, and the hollow structure is disposed corresponding to the accommodating groove; a circuit board, disposed in the accommodating cavity, wherein the circuit board is electrically connected with the stator by a contact pin; and a sensor, disposed in the accommodating cavity, wherein the sensor is electrically connected with the stator, and the sensor is located on a side of the circuit board that is away from the stator. Further disclosed is an electronic expansion valve including the stator assembly.

Abstract: Provided is an electric valve, including a valve seat and a valve needle, and the valve needle is mounted in the valve seat; a valve core, which is mounted at an end of the valve seat, and the valve core forms a valve opening; a driving assembly, which drives the valve needle to axially move so as to open and close the valve opening; the valve core is made of a non-metal material, an inner wall or an end face of the valve core forms a sealing face, and the sealing face and an outer wall face of the valve needle form a soft sealing structure. Through the soft sealing structure composed of the valve core and the valve needle, the technical problem of poor sealing performance of the electric valve can be solved.

Abstract: A valve device is provided, including a valve body unit and a valve seat. The valve seat is provided with a mounting cavity, and an end of the valve body unit is mounted in the mounting cavity. The valve device further includes a limiting unit, an outer side wall of the valve seat is provided with a mounting hole in communication with the mounting cavity along a radial direction of the mounting cavity, a side wall of the mounting cavity is recessed to form a mounting groove corresponding to the mounting hole, an end of the limiting unit extends into the mounting cavity from the mounting hole and is inserted into the mounting groove, and the limiting unit that extends into the mounting cavity abuts against the valve body unit to perform limiting along an axial direction and a circumferential direction between the valve body unit and the valve seat.

Abstract: Various examples include an apparatus to characterize substrate and film thicknesses of the substrate and films formed thereon. The apparatus uses one or more wavelengths of light from a light source (e.g., a swept laser) to interrogate the substrate. The light is directed substantially orthogonally to an upper surface of the substrate. A polarizer and an analyzer element are coupled between the light source and the substrate. Therefore, the polarizer and the analyzer are both located in the beam propagation path from the light source to the substrate. An optical detector is arranged substantially orthogonally to the upper surface of the substrate. The optical detector receives light returned back from the substrate. The apparatus is capable of determining the thickness of the substrate and one or more films contained thereon, regardless of substrates having optical anisotropies, such as chiral characteristics or stress-induced films. Other apparatuses and methods are also disclosed.