Thermal expansion valve

The technology of thermal expansion valve and valve core is applied in the field of thermal expansion valve, which can solve the problems of high processing technology requirements and complex structure of the valve body, and achieve the effect of simple and reliable processing technology and simplified processing technology.
CN103423926AActive Publication Date: 2013-12-04ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
8 Cites 7 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SANHUA COMMERCIAL REFRIGERATION CO LTD
Publication Date
2013-12-04

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a thermal expansion valve with a unidirectional control function. The thermal expansion valve comprises a valve (1), a temperature sensing assembly (2) and a first valve element assembly (4). The valve (1) is provided with an inlet channel (11) and an outlet channel (12), the temperature sensing assembly (2) is arranged at one end of the valve (1), the first valve element assembly (4) is arranged in an inner cavity of the valve (1) and comprises a valve stem (41) and a first valve element (42), the valve stem (41) is abutted to the temperature sensing assembly (2), and the first valve element (42) is matched with a first valve port (14) arranged in the inner cavity (13), so that the flow of medium fluid which flows from the inlet channel (11) to the outlet channel (12) can be controlled. The thermal expansion valve is characterized in that the valve (1) is further provided with an accommodating portion, a cover (5) is arranged in the accommodating portion, and an inner hole (16) of the cover (5) is communicated with the inlet channel (11) and the inner cavity (13) to form auxiliary fluid channels. Compared with the prior art, the thermal expansion valve with the unidirectional control function has the advantages that the cover is arranged on the valve, so that a valve machining process is simplified; a valve port and a sealed position can be machined on the cover in the preferred scheme by means of drawing at one step, and a guide portion or limiting portion can be arranged on the cover by means of stamping, so that the machining process is simple and reliable, and the thermal expansion valve is suitable for mass production.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to a refrigeration control system, in particular to a thermal expansion valve with a single control function used in an air conditioning system. Background technique

[0002] Thermal expansion valves are usually used in heat pump control systems. In heat pump control systems, the refrigerant can generally flow in reverse to achieve the functions of cooling and heating. The thermal expansion valves in the prior art are generally set in one direction, and the one-way valve is set on the external bypass. to the valve. When the system flows forward, the one-way valve is closed, and the medium is throttled through the expansion valve. When the system is flowing in the reverse direction, the one-way valve is opened, and the medium flows through the one-way valve. But the separate one-way valve and bypass channel Will increase installation costs and maintenance costs, the potential for leakage will increase.

[0003] Therefore, in rece...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More