| Zhejiang Sanhua Climate and Appliance Controls Group Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110100487 | FLOW PATH SWITCH CONTROL DEVICE - 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. An adjusting device is provided in the pressure balancing control circuit to reduce a pressure change in fluid passing through the pressure balancing control circuit when the flow path switch control device is opened/closed, which enables the flow path switch control device to be smooth during the process of opening or closing, and thus avoid the problem of strong vibration and noise occurred at the moment when the solenoid switch is operated under large pressure difference. | 05-05-2011 |
| 20110017319 | END COVER AND FOUR-WAY REVERSING VALVE USING THE SAME AND ASSEMBLING METHOD THEREOF - 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. The present invention may meet the requirement for the position precision between the valve body and the end cover and improve the welding precision therebetween. | 01-27-2011 |
| 20090084130 | OIL-RETURNING DEVICE AND ACCUMULATOR - 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 S | 04-02-2009 |
