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Electronic expansion valve

An electronic expansion valve, valve seat technology, applied in lighting and heating equipment, climate sustainability, fluid circulation arrangement, etc., can solve the problem of high cost, achieve the effect of eliminating welding procedures and reducing costs

Active Publication Date: 2015-06-17
ZHEJIANG DUNAN HETIAN METAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The valve core seat of the above-mentioned electric valve is an integral structure, including the casing part and the valve port seat matched with the nut assembly. The casing and the valve port seat are processed in one piece, and the cost is relatively high.

Method used

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  • Electronic expansion valve
  • Electronic expansion valve
  • Electronic expansion valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Please refer to figure 1 , the electronic expansion valve shown includes a valve seat 1, a nut seat assembly and a sleeve 6, an inlet and a valve port 12 are arranged on the valve seat 1, an inlet pipe 91 is connected to the inlet, and an outlet pipe 92 is connected to the valve port 12 , There is a guide sleeve 2 between the nut assembly and the valve port 12, a boss 11 is provided on the surface of the valve seat 1 opposite to the guide sleeve 2, the valve port 12 is set on the boss 11, and the bottom end of the guide sleeve 2 is socketed On the boss 11, the fixing is realized through the tight fit between the two, and welding is no longer required. The bottom side wall of the guide sleeve 2 is provided with an air inlet 22, the air inlet 22 is opposite to the inlet, the nut seat 3 is connected with a valve core part 4, the valve core part 4 includes a screw mandrel 41 and a valve needle 42, the screw mandrel 41 Threaded connection with the nut seat 3, the valve need...

Embodiment 2

[0035] Please refer to figure 1 and Figure 4 In this embodiment, the structure of the connecting piece 7 is changed. The connecting piece 7 includes an annular flat plate connected between the outer circular surface of the guide sleeve 2 and the inner wall of the opposite valve seat 1, and the annular flat plate is connected to one end of the outer circular surface of the guide sleeve 2. (that is, the inner ring side of the connecting piece 7) is the pressing part 71, and the end of the ring-shaped plate connected to the inner wall of the valve seat 1 is the positioning part 72, and there is a connecting section connected with the nut seat 3 between the pressing part 71 and the positioning part 72 73 , the end of the nut seat 3 facing the guide sleeve 2 is connected with the connecting section 73 . Compared with the first embodiment, the connecting piece 7 of this structure is simpler in structure, easier in processing, and lower in manufacturing cost.

[0036] Please refer...

Embodiment 3

[0038] see Figure 5 and combine image 3 and Figure 4 Compared with Embodiment 1 or 2, in this embodiment, a positioning step 21 is provided on the outer surface of the guide sleeve 2 towards the end of the nut seat 3, and the pressing part 71 is against the positioning step 21 (that is, the guide sleeve and the A positioning step 21 is set at the abutment of the connecting piece, and the guide sleeve cooperates with the inner ring surface of the connecting piece to guide); during the assembly process, the connecting piece 7 is resisted by the positioning step 21 to prevent the connecting piece 7 from moving along the guide sleeve 2 axis. To move, and by setting the positioning step 21 to accurately locate the position between the connecting piece 7 and the guide sleeve 2, to ensure that the two are connected in place, thereby also determining the position of the nut seat 3 and the positional relationship between the positioning piece 7 and the valve seat 1, can be Improve...

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PUM

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Abstract

The invention discloses an electronic expansion valve. The electronic expansion valve comprises a valve seat, a nut assembly and a casing pipe. The nut assembly comprises a nut seat and a connecting piece, and is connected with the valve seat through the connecting piece; a guide sleeve is arranged between the valve seat and the nut assembly, and a valve element component is connected to the nut assembly; a magnetic rotor is connected to the valve element component, and the casing pipe is connected with the valve seat; and the electronic expansion valve is characterized in that the lower end of the guide sleeve abuts against the valve seat, and the nut assembly abuts against the upper end of the guide sleeve. According to the electronic expansion valve, the upper end and the lower end of the guide sleeve abut against the nut assembly and the valve seat respectively, and the connecting piece in the nut assembly is fixedly welded with the valve seat, so that fixation of the nut assembly, the guide sleeve and the valve seat is achieved; and the welding procedure in the prior art is removed, and the cost is reduced.

Description

technical field [0001] The invention relates to an accessory of refrigeration equipment, in particular to a flow control valve. Background technique [0002] The refrigeration equipment realizes the control of the refrigeration flow through the electronic expansion valve. The electronic expansion valve uses the principle of a stepping motor to drive the magnetic rotor part to rotate forward and reverse with a coil, and converts the rotation of the magnetic rotor part into the up and down movement of the screw rod, and the screw rod drives the valve stem connected to it to rise or Decrease to control the flow rate of the electronic expansion valve. However, in the prior art, it is difficult to ensure the coaxiality of the components in the electronic expansion valve, thus affecting the performance of the expansion valve. [0003] The patent document with the application number "CN201010515234.1" discloses an electric valve, which includes a valve seat assembly, a nut assemb...

Claims

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Application Information

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IPC IPC(8): F25B41/06F25B41/34
CPCF25B41/31Y02B30/70
Inventor 王定军
Owner ZHEJIANG DUNAN HETIAN METAL CO LTD