A switching valve device for switching an intermediate flow path through which a fluid flows from an inlet to an outlet includes: a first valve which switches a flow path extending from the inlet to one of two flow paths; and a second valve which is provided on a downstream side of the first valve and switches the intermediate flow path by a differential pressure generated by depressurization in an external flow path Lout connected to the intermediate flow path connected to one of the two flow paths.

A switching valve device for switching an intermediate flow path through which a fluid flows from an inlet to an outlet includes: a first valve which switches a flow path extending from the inlet to one of two flow paths; and a second valve which is provided on a downstream side of the first valve and switches the intermediate flow path by a differential pressure generated by depressurization in an external flow path Lout connected to the intermediate flow path connected to one of the two flow paths.

A four-way valve for switching a refrigerant flow path includes: a housing part including a refrigerant filling chamber configured to receive refrigerant; a valve plate disposed at one side of the housing part and having at least three inflow/outflow holes formed therein; a valve pad part disposed in the refrigerant filling chamber, rotating to contact one of surfaces of the valve plate, and occupying one of the at least three inflow/outflow holes continuously and occupying selectively one of the remaining holes of the at least three inflow/outflow holes so as to make the occupied inflow/outflow holes communicate with each other, thereby forming a changed flow path; a rotation drive part for transferring a driving force to rotate the valve pad part; and a deceleration part, disposed between the rotation drive part and the valve pad part, for increasing a driving torque transferred from the rotation drive part.

A reversing valve comprising a valve body having an internal cavity therein and an input port, output port and first and second reversing ports. A baffle is located within the internal cavity and is configured to rotate around a pivot point within the internal cavity. At least one electromagnet is coupled to the valve body. The electromagnet is configured to cause the baffle to rotate in one of the clockwise direction or counter-clock wise direction when a voltage is applied to the electromagnet.

A four-way valve for switching a refrigerant flow path includes: a housing part including a refrigerant filling chamber configured to receive refrigerant; a valve plate disposed at one side of the housing part and having at least three inflow/outflow holes formed therein; a valve pad part disposed in the refrigerant filling chamber, rotating to contact one of surfaces of the valve plate, and occupying one of the at least three inflow/outflow holes continuously and occupying selectively one of the remaining holes of the at least three inflow/outflow holes so as to make the occupied inflow/outflow holes communicate with each other, thereby forming a changed flow path; a rotation drive part for transferring a driving force to rotate the valve pad part; and a deceleration part, disposed between the rotation drive part and the valve pad part, for increasing a driving torque transferred from the rotation drive part.

The invention provides a rotary four-way reversing valve with low pressure drop and low leakage, comprising a valve body and a valve core arranged in the valve body through bearings. The valve body comprises a low-pressure exhaust tube, a high-pressure air inlet tube, a condenser tube and an evaporating tube. The valve core is slantingly divided by a U-shaped seal ring with a spring into a high-pressure chamber and a low-pressure chamber that are not communicated with each other. The valve core comprises a through hole arranged in the high-pressure chamber and aligned with the high-pressure air inlet tube of the valve body and an opening aligned with the condenser tube or the evaporating tube, an opening arranged in the low-pressure chamber and always aligned with the low-pressure exhaust tube and an opening aligned with the condenser tube or the evaporating tube.

A reversing valve comprising a valve body having an internal cavity therein and an input port, output port and first and second reversing ports. A baffle is located within the internal cavity and is configured to rotate around a pivot point within the internal cavity. At least one electromagnet is coupled to the valve body. The electromagnet is configured to cause the baffle to rotate in one of the clockwise direction or counter-clock wise direction when a voltage is applied to the electromagnet.

A guide frame for a four-way reversing valve includes a frame body. Both ends of the frame body include a connecting portion, respectively. The connecting portion includes a first bending member and a second bending member, and the directions of bending of the first bending member and of the second bending member are opposite. The connecting portion includes a reinforcing member. The reinforcing member includes a first reinforcing plate and a second reinforcing plate. The first reinforcing plate is connected to the inner side of the first bending member by welding and the second reinforcing plate is connected to the inner side of the second bending member by welding. The connection strength of the connecting portion is increased, such that the guide frame is less likely to deform or break.

The flow path switching device includes: a body 100 including an outer cylinder 101 having four ports 111 and a plug 102 having two arc-shaped tunnel-like flow paths 121 each connecting adjacent two of four openings 102a formed in a side surface of the plug 102. The plug 102 is rotatable between a first position and a second position, the first position being a position in which one of the flow paths 121 connects adjacent two of the four ports 111 and the other flow path 121 connects the remaining two ports, and the second position being a position in which each of the flow paths connects adjacent two of the ports 111 which are not connected when the plug 102 is located at the first position.

A reversing valve comprising a valve body having an internal cavity therein and an input port, output port and first and second reversing ports. A baffle is located within the internal cavity and is configured to rotate around a pivot point within the internal cavity. At least one electromagnet is coupled to the valve body. The electromagnet is configured to cause the baffle to rotate in one of the clockwise direction or counter-clock wise direction when a voltage is applied to the electromagnet.