Abstract: Disclosed are an electronic expansion valve and a refrigeration system. The electronic expansion valve includes: a valve seat provided with an inlet, an outlet and a communication channel in communication with the inlet and the outlet; an actuator movably mounted in the valve seat, wherein the actuator is provided with a first position to block the communication channel and a second position to avoid the communication channel; and a driving mechanism connected with the actuator to drive the actuator to move between the first position and the second position, wherein the driving mechanism includes noise reduction members to reduce noise of the electronic expansion valve.

Abstract: The disclosure provides a heat exchanger and an, air conditioner with the heat exchanger. A heat exchange assembly includes a first channel and a second channel which are used for allowing a refrigerant to pass through, a communication portion communicated with the first channel and the second channel, and a plurality of protrusions.

Abstract: Some embodiments of the present disclosure provide an electronic expansion valve, including: a valve body, the valve body having a valve port; a valve head portion, movably provided in the valve body, the valve head portion including a valve head and a pressing sleeve, the valve head having an accommodating cavity, the end of the accommodating cavity close to the valve port having a bottom wall, a through hole being provided on the bottom wall, and the valve head being used for blocking the valve port; a guide sleeve, provided in the valve body, the valve head portion being inserted in the guide sleeve; a driving portion, movably provided in the valve body, an end of the driving portion penetrating the pressing sleeve, and a channel being provided on the end of the driving portion.

Abstract: Disclosed is a nut assembly for an electronic expansion valve, an electronic expansion valve, and a limiting element mounting method. The nut assembly comprises a nut base, having a first end and a second end opposite to each other; a stop guide rail, sleeved on the nut base; a check ring, sleeved on the nut base and capable of helically rotating with respect to the nut base along the stop guide rail; and a limiting element, provided at the first end of the nut base The limiting element mounting method comprises the following steps: enabling the limiting element to be sleeved on the nut base, and enabling a second limiting boss to extend from a groove opening of a first limiting groove into the first limiting groove; and enabling, by means of the limiting element, the second limiting boss to slide into a corresponding second limiting groove.

Abstract: A pilot valve is provided, which comprises a valve body having a cylindrical structure, a magnetically permeable sleeve made of permeability magnetic material, and a coil assembly. The magnetically permeable sleeve is sleeved and fixed on one end of the valve body. The coil assembly is sleeved on the magnetically permeable sleeve. The coil assembly comprises an electromagnetic coil wound along the circumference of the magnetically permeable sleeve.

Abstract: Disclosed are a valve body connection structure and a valve assembly with the valve body connection structure. The valve body connection structure includes: a first connector including a first connection part and a first plug-in part, wherein the first connection part is fixedly connected to the main valve, and the first plug-in part is disposed on the first connection part; and a second connector including a second connection part, a second plug-in part and an extension part, wherein the second connection part is fixedly connected to the pilot valve, the second plug-in part is disposed on the second connection part, the first plug-in part matches the second plug-in part in an insertion manner, the extension part is disposed on the second connection part, and the extension part is provided with an assembly hole allowing a pipeline of the pilot valve to pass through.

Abstract: Some embodiments of the present disclosure provides a heat exchanger, including: a plurality of flat pipes disposed at intervals, wherein the flat pipe is provided with an inlet portion and an outlet portion, and both the inlet portion and the outlet portion are located on a first end of the flat pipe; a first sealing cushion block, disposed between two adjacent flat pipes; and a flow collecting portion, provided with a first opening portion and a second opening portion, wherein the first opening portion is disposed opposite to the inlet portion, and the second opening portion is disposed opposite to the outlet portion. The first sealing cushion block includes a first sealing portion and a second sealing portion.

Abstract: An electronic expansion valve (1-100) is provided. The electronic expansion valve (1-100) includes: a screw (1-31), a valve needle (1-22), and an elastic member (1-25). One end of the elastic member (1-25) acts on the screw (1-31) and the other end acts on the valve needle (1-22). A bearing (1-23) is arranged between the screw (1-31) and the valve needle (1-22). The bearing (1-23) has an inner ring and an outer ring. One of the screw (1-31) and the valve needle (1-22) is fixed with the inner ring of the bearing (1-23), and the other acts on the outer ring of the bearing (1-23) through the elastic member (1-25). An air conditioning system using the electronic expansion valve (1-100) is provided. In the electronic expansion valve (1-100), the bearing (1-23) is arranged between the valve needle (1-22) and the screw (1-31).

Abstract: A one-way valve is provided. The one-way valve includes a housing and a valve core assembly. The housing is provided with a valve port. A ratio of a wall thickness of the housing to an outer diameter of the housing is in a range of 0.08 and 0.12. The valve core assembly is movably disposed in the housing and configured to open or seal the valve port.

Abstract: An electronic expansion valve, comprising a valve seat assembly and a valve core assembly. The valve core assembly is disposed in the valve seat assembly. The valve seat assembly comprises a valve seat, a valve seat core, and a guide sleeve. The valve seat is provided with a valve cavity, one end of which is open. A through hole is provided on the valve seat core; the end of the conduction portion close to the guide sleeve is circumferentially provided with an inclined surface inclined outwards. The valve core assembly comprises a valve head. The end of the valve head close to the valve seat core is provided with a sealing surface. The valve head is driven to move close to or away from the valve seat core, so as to adjust the gap between the inclined surface and the sealing surface.

Abstract: Methods of manufacturing a pressure sensor from an SOI wafer are provided. In preferred embodiments, the methods comprise forming a cavity in a SOI wafer by removing a first portion of a bottom silicon layer on the bottom side of the SOI wafer to a depth of an insulator layer; depositing a layer of a second material over the cavity; removing both the silicon layer and the insulator layer from a top side of the SOI wafer in a first plurality of areas above the cavity to form a diaphragm from the layer of a second material, wherein at least one support structure that spans the diaphragm is formed from material above the cavity that was not removed; and forming at least one piezoresistor in the SOI wafer over an intersection of the support structure and SOI wafer at an outside edge of the diaphragm.

Abstract: The present disclosure provides a heat exchanger flat tube and a heat exchanger with the heat exchanger flat tube, the heat exchanger flat tube includes two plates opposite to each other, a fluid passage is formed between the two plates, a turbulence structure is provided in the fluid passage and has a gradually expanding portion and a gradually narrowing portion, both an extension direction of the gradually expanding portion and an extension direction of the gradually narrowing portion are consistent with a flow direction of a fluid, and the gradually narrowing portion is located downstream of the gradually expanding portion along the flow direction of the fluid.

Abstract: An electronic expansion valve comprises: a valve body, the valve body comprising a main body section, an extension section, and a step section, wherein a valve seat core being in a tubular shape and having openings at two ends, wherein the valve seat core comprises a tubular body and a limiting step formed at one end of the tubular body, the tubular body penetrates through the extension section, the limiting step abuts against the inner wall of the step section, and one end of the tubular body away from the limiting step extends out of the extension section; and an air outlet pipe, which is sleeved in the extension section and abuts against an outer wall of the step section, a groove is defined by an inner wall of the air outlet pipe, the extension section, and an outer wall of the tubular body in a surrounding mode.

Abstract: Provided are a micro valve device and a valve body assembly. The micro valve device comprises at least two control ports (402, 404) and at least two movable members (302), wherein the at least two movable members (302) respectively control each of the at least two control ports (402, 404) to realize that opening and closing of the control ports (402, 404) are independently controlled, so that the at least two control ports (402, 404) can output fluids with the same or different flow rate(s) or pressure(s). The valve body assembly comprises the micro valve device.

Abstract: A microvalve device and fluid flow control method, the microvalve device comprising: a microvalve body, the microvalve body being composed of multiple layers and comprising a first layer (1) and a second layer (2) bonded with the first layer (1), the second layer (2) having a plurality of fluid ports (7, 8, 9); a cavity (6) disposed between the first layer and the second layer; a plurality of actuators (3, 4, 5) respectively disposed corresponding to each fluid port, the plurality of actuators (3, 4, 5) controlling the opening and closing of the plurality of fluid ports (7, 8, 9). The fluid flow control method comprising: respectively employing a plurality of actuators to independently control the opening and closing of a plurality of fluid ports.