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Thermal expansion valve with unidirectional control function

A thermal expansion valve and one-way control technology, applied in the field of thermal expansion valves, can solve problems such as product reliability decline, expansion valve leakage, complex structure, etc., and achieve the effects of simple and reliable installation, convenient structure processing, and lift valve function

Active Publication Date: 2014-05-14
浙江三花商用制冷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Apparently, although the above-mentioned structure can integrate a single expansion valve and a one-way valve into an integrated structure, since it is necessary to process an opening on the valve body to install a nut cover and install a one-way valve device, it is easy to cause leakage of the expansion valve. directly lead to a decrease in the reliability of the product
In addition, this structure is complex and requires high processing technology
At the same time, the flow path with one-way open channel in the prior art is complicated and has a large flow resistance, which has an adverse effect on the system

Method used

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  • Thermal expansion valve with unidirectional control function
  • Thermal expansion valve with unidirectional control function
  • Thermal expansion valve with unidirectional control function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] See figure 2 and image 3 ,in, figure 2 It is a structural schematic diagram of the thermal expansion valve with one-way control function described in the first embodiment, image 3 yes figure 2 Schematic diagram of the valve body structure of the thermal expansion valve described in .

[0030] Such as figure 2 and image 3 shown. In this embodiment, the thermal expansion valve includes a valve body 1, on which an inlet channel 11 and an outlet channel 12 are arranged, and an inner cavity 13 communicating with the inlet channel 11 and the outlet channel 12 is processed in the valve body 1, The temperature sensing component 2 is placed at one end of the valve body 1 . The inner cavity 13 of the valve body 1 also includes a vertical through hole 17 communicating with the temperature sensing component 2 , the lower part of the hole 17 intersects with the inner cavity 13 to form a first valve port 14 .

[0031] The first valve core part 4 is provided through the...

Embodiment 2

[0046] Compared with the first embodiment, this embodiment has the same main body composition and connection relationship. The difference is that in this solution, a further positioning function is added to the inner end of the limit pin rod 55 .

[0047] Please also see Figure 6 and Figure 7 ,in, Figure 6 It is a structural schematic diagram of the thermal expansion valve with one-way control function described in the second embodiment; Figure 7 yes Figure 6 The schematic diagram of the valve body structure of the thermal expansion valve shown in . In order to clearly show the difference between this solution and the first embodiment, components and structures with the same function are marked with the same reference numerals.

[0048] Such as Figure 6 and Figure 7 As shown, opposite to the guide hole 191 in the axial direction, a positioning blind hole 192 is opened on the other side wall of the receiving portion 16 , and the inner end of the limit pin rod 55 i...

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Abstract

The invention discloses a thermal expansion valve with a unidirectional control function. The thermal expansion valve comprises a valve body having an inlet passage and an outlet passage, a temperature sensing part disposed at one end of the valve body, and a first spool part disposed in an inner cavity of the valve body. The first spool part comprises a valve stem and a first spool; the valve stem is abutted to the temperature sensing part; the first spool coordinates with a first valve port in the inner cavity to control the quantity of medium fluid flowing from the inlet passage to the outlet passage. The valve body further comprises an accommodating portion extending from the inlet passage to the inside of the valve body. The accommodating portion is provided with a second valve port. A second spool part is disposed in the accommodating portion. A limit pin used for limiting an opening position of the second spool part is further disposed in the accommodating portion. When the medium flows from the inlet passage to the outlet passage, the second valve port is closed; when the medium flows from the outlet passage to the inlet passage, the second valve port opens. Compared with the prior art, the thermal expansion valve has the advantages that the influence upon flow capacity of the unidirectional valve is effectively decreased on the premise of improving manufacturability.

Description

technical field [0001] The invention relates to the technical field of refrigeration components, in particular to a thermal expansion valve with a one-way control function. Background technique [0002] The thermal expansion valve as a throttling device is widely used in the circuit of the refrigeration system to control the flow of the refrigerant by sensing the temperature and pressure of the refrigerant at a specific location; with the continuous promotion of commercial refrigeration equipment, the thermal expansion valve is used in commercial It is also widely used in large capacity refrigeration systems. [0003] In the prior art, if the evaporator and condenser are far away from the compressor pipeline in the refrigeration system (greater than 25 meters), the thermal expansion valve is realized by connecting a check valve in parallel (the direction is opposite to that of the expansion valve). , to improve system stability. The flow direction of the one-way valve is o...

Claims

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Application Information

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IPC IPC(8): F25B41/06F25B41/31
Inventor 不公告发明人
Owner 浙江三花商用制冷有限公司
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