Abstract: An electronic expansion valve and a connector assembly thereof are provided. The connector assembly includes a connector seat hermetically connected to a housing of the electronic expansion valve, and contact pins configured to connect an external control component. The housing has a valve cavity in which an electrical motor is arranged, the connector seat has a sealing cavity in communication with the valve cavity, an insulation sleeve is provided inside the sealing cavity and provided with mounting positions corresponding to terminals of the electrical motor, and the mounting positions are electrically insulated from each other and spaced from each other, the insulation sleeve is further provided with connecting holes, and each contact pin has one end passing through the respective connecting hole to be connected to the respective terminal, and another end extending out of the sealing cavity to form a connecting end to connect the external control component.

Abstract: A gas-liquid separator applicable to a refrigeration system includes a cylindrical body, an inlet pipe fixedly connected to an upper end of the cylindrical body and an outlet pipe fixedly connected to a lower end of the cylindrical body, and further includes a gas guiding element, the gas guiding element further including a baffle, a flange located at one end of the baffle, and a bottom plate located at the other end of the baffle, the baffle being located above the outlet pipe and blocking a gas inlet of the outlet pipe; the flange being fixedly connected to an inner wall of the cylindrical body; and the bottom plate being fixedly connected to a side wall of a gas inlet end of the outlet pipe.

Abstract: The present invention relates to a four-way reversing valve for refrigerating cycle system, in particular to an end cover for fitting with a valve body of a main valve of a four-way reversing valve, a four-way reversing valve using the same and an assembling method thereof. The end cover has a larger diameter section and a smaller diameter section sequentially provided in an axial direction, wherein an outer periphery of the larger diameter section of the end cover is adapted to be tightly connected with the valve body, and an end portion of the smaller diameter section of the end cover is adapted to be fitted with a piston of the main valve, so as to define an operating position of the piston, characterized in that the larger diameter section of the end cover has a frustum shape with a larger outer end and smaller inner end, or an end portion of the larger diameter section of the end cover has radially projected flange for abutting against and fitting with an end surface of the valve body.

Abstract: Disclosed herein is a one-way filter drier comprising a cartridge having an inlet and an outlet, a molecular sieve being provided inside the cartridge, a first filter sheet being provided between the molecular sieve and the outlet, a spring and a second filter sheet being provided between the inlet and the molecular sieve in sequence, wherein at least one piece of third filter sheet is provided in the spring. In the one-way filter drier provided by the present application, the third filter sheet is provided in the spring, the refrigerant still has relative large flowing space after entering via the inlet, which may ensure the requirement of the fluid flux; at the same time, the third filter sheet combining with the first filter sheet and the second filter sheet may maximize the filter capacity.

Abstract: Disclosed herein is a bi-flow filter drier including a cartridge and a filter core located inside the cartridge. A filter sheet is provided at each of two ends of the filter core. The bi-flow filter drier further includes at least one intermediate filter sheet positioned between the cartridge and the filter core. In the bi-flow filter drier of the application, the refrigerant flows into the filter core after being filtered by the intermediate filter sheet, and flows through the center hole of the filter core towards the filter sheet at one end of the filter core, and then flows out of the filter drier after being re-filtered. This bi-flow filter drier allows the refrigerant to pass through the filter sheets twice, and the filtration capacity and the filtration precision are improved. The intermediate filter sheet may protect the filter core to prolong the service life thereof.

Abstract: The present invention provides an oil-returning device and a accumulator, the oil-returning device including an outlet pipe and a filtering component, the outlet pipe having an bent arc portion which is provided with a positioning hole, the filtering component including a filtering screen and a filtering screen base with an oil-returning orifice, and being fixedly installed in the positioning hole, wherein an effective cross section area Sn of an inner space of the outlet pipe at a position where the filtering component is installed is in a range of 50%˜90% of an original effective cross section area S0 of the inner space of the untreated outlet pipe at a position where the filtering component is to be installed.

Abstract: A motor-operated selector valve relating to refrigerating technology is provided. In the present invention, a slider is controlled by a stepper motor so as to be rotatablely displaced among four positions on a flat bottom surface of a valve seat. Three outlets on the flat bottom surface are communicated with a normal open inlet in the valve seat via flow-guiding orifices in the slider respectively. In the first working position, the first outlet and the third outlet are in communication with the normal open inlet at the same time; in the second working position, the second outlet is in communication with the normal open inlet; in the third working position, the third outlet is in communication with the normal open inlet; in the fourth working position, the first outlet is in communication with the normal open inlet.

Abstract: Disclosed herein is a flow path switch control device used in a control system such as HVAC, refrigeration system and the like. In the prior art, since the pressure at an upper portion of a piston will drop instantaneously at the moment when a pilot valve is opened and closed, a large pressure difference is formed between the upper and lower sides of a piston to drive the piston to move, which results in a strong impact between a piston stopping member and the piston. Therefore, the life span of a product and the operating stability of the system will be affected. The flow path switch control device of the present invention includes a fluid inlet, a fluid outlet, a valve device arranged between the fluid inlet and the fluid outlet, and a pressure balancing control circuit.

Abstract: The present invention relates to a four-way reversing valve for refrigerating cycle system, in particular to an end cover for fitting with a valve body of a main valve of a four-way reversing valve, a four-way reversing valve using the same and an assembling method thereof. The end cover has a larger diameter section and a smaller diameter section sequentially provided in an axial direction, wherein an outer periphery of the larger diameter section of the end cover is adapted to be tightly connected with the valve body, and an end portion of the smaller diameter section of the end cover is adapted to be fitted with a piston of the main valve, so as to define an operating position of the piston, characterized in that the larger diameter section of the end cover has a frustum shape with a larger outer end and smaller inner end, or an end portion of the larger diameter section of the end cover has radially projected flange for abutting against and fitting with an end surface of the valve body.

Abstract: The present invention provides an oil-returning device and a accumulator, the oil-returning device including an outlet pipe and a filtering component, the outlet pipe having an bent arc portion which is provided with a positioning hole, the filtering component including a filtering screen and a filtering screen base with an oil-returning orifice, and being fixedly installed in the positioning hole, wherein an effective cross section area Sn of an inner space of the outlet pipe at a position where the filtering component is installed is in a range of 50%˜90% of an original effective cross section area S0 of the inner space of the untreated outlet pipe at a position where the filtering component is to be installed.

Abstract: A motor-operated selector valve relating to refrigerating technology is provided. There are disadvantages, such as complicated assembly structure, big noise, vulnerability to interferences etc., in prior art. In the present invention, a slider is controlled by a stepper motor so as to be rotatablely displaced among four positions on a flat bottom surface of a valve seat. Three outlets on the flat bottom surface are communicated with a normal open inlet in the valve seat via flow-guiding orifices in the slider respectively. In the first working position, the first outlet and the third outlet are in communication with the normal open inlet at the same time; in the second working position, the second outlet is in communication with the normal open inlet; in the third working position, the third outlet is in communication with the normal open inlet; in the fourth working position, the first outlet is in communication with the normal open inlet.