Electrically operated valve

Patent metadata

Field	Value
Publication number	US-11619317-B2
Application number	US-201917252477-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jun 15, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

An electrically operated valve includes a rotor, a stator assembly, a sleeve, a valve assembly, a box body, a circuit board assembly, and a valve port. The stator assembly is disposed outside the rotor, and the stator assembly includes a coil assembly. The sleeve is configured to isolate the stator assembly from the rotor. The valve assembly includes a spool. The box body has a cavity, and the circuit board assembly is accommodated in the cavity. The rotor is configured to drive the spool to move close to or away from the valve port.

First claim

What is claimed is:

1. An electrically operated valve, comprising:
a rotor;
a stator assembly disposed outside the rotor, wherein the stator assembly comprises a coil assembly;
a sleeve, configured to isolate the stator assembly from the rotor;
a valve assembly partially disposed in the sleeve, wherein the valve assembly comprises a spool;
a box body and a circuit board assembly, wherein the box body has a cavity, the circuit board assembly is accommodated in the cavity, and the box body is disposed at one side of the rotor; and
a valve port disposed below the stator assembly and the rotor;
wherein the rotor is configured to drive the spool to move close to or away from the valve port;
wherein the electrically operated valve further comprises a waterproof and breathable membrane, the box body comprises a communication passage, the waterproof and breathable membrane comprises a fixed connection portion and a ventilation portion, the fixed connection portion is disposed around the ventilation portion, the fixed connection portion is fixed to the box body, and the fixed connection portion is fixed to the box body by hot-pressing, welding or fixing glue; and
wherein the cavity is configured to communicate with gas outside the box body through the ventilation portion and the communication passage, so that water outside the box body is not able to enter the cavity through the waterproof and breathable membrane, thereby reducing water vapor in the cavity accommodating the circuit board assembly;
wherein the box body comprises a second housing, the second housing comprises a first concave portion, the communication passage is communicated with the first concave portion, the waterproof and breathable membrane is configured to be accommodated in the first concave portion, and the cavity is disposed at a first side of the waterproof and breathable membrane, and the communication passage is disposed at a second side of the waterproof and breathable membrane;
wherein the first concave portion comprises a first bottom wall, a second bottom wall and a side wall of the first concave portion, the side wall of the first concave portion is disposed between the first bottom wall and the second bottom wall, the communication passage is formed on the second bottom wall, and the fixed connection portion is fixed to the first bottom wall; and
wherein the first concave portion further comprises a shielding portion disposed protruding from the side wall of the first concave portion, a protruding height of the shielding portion is greater than a width of the communication passage, and the shielding portion is disposed at a setting distance from the second bottom wall.

2. The electrically operated valve of claim 1 , wherein the box body further comprises a first housing, the first housing and the second housing are fixed by welding, and the first housing is fixed to the stator assembly.

3. The electrically operated valve of claim 2 , wherein the first concave portion is recessed from the cavity to an exterior of the second housing.

4. The electrically operated valve of claim 3 , wherein the first bottom wall and the second bottom wall are arranged in a stepped manner, a plane where the first bottom wall is located is lower than a surface where the second housing is located, the second bottom wall is disposed lower than the first bottom wall, the waterproof and breathable membrane is configured to separate the first concave portion into a first cavity and a second cavity, the second cavity is communicated with the communication passage, and the first cavity is communicated with the cavity.

5. The electrically operated valve of claim 3 , wherein the second housing comprises a base plate and a cover plate which are separately formed and fixedly connected to each other, the communication passage is disposed between the base plate and the cover plate, and the fixed connection portion is disposed between the base plate and the cover plate.

6. The electrically operated valve of claim 5 , wherein the base plate comprises a second concave portion and a first through-hole portion, the second concave portion is recessed from the exterior of the second housing to the cavity, the second concave portion is communicated with the cavity through the first through-hole portion, the second concave portion comprises a side wall of the second concave portion and a bottom of the second concave portion, the first through-hole portion is configured to penetrate through the bottom of the second concave portion, and the fixed connection portion is fixed to the bottom of the second concave portion.

7. The electrically operated valve of claim 6 , wherein the second housing further comprises a first welding portion and a first mounting portion, the first welding portion is disposed protruding from the bottom of the second concave portion, the first welding portion is spaced a setting distance from the side wall of the second concave portion, the cover plate and the base plate are welded and fixed through the first welding portion, the first mounting portion is disposed between the first welding portion and the first through-hole portion, and the fixed connection portion is in contact with and fixed to the first mounting portion.

8. The electrically operated valve of claim 6 , wherein the cover plate comprises a circumferential side portion, a part of the side wall of the second concave portion is in an abutment fit or a small clearance fit with the circumferential side portion, and the communication passage is formed between the part of the side wall of the second concave portion and the circumferential side portion.

9. The electrically operated valve of claim 8 , wherein the communication passage comprises a first portion and a second portion, and at least one of the side wall of the second concave portion or the circumferential side portion is provided with a groove; the groove is configured to be formed by recessing on the at least one of the side wall of the second concave portion or the circumferential side portion, and a length of the groove is less than a length of the cover plate and is greater than or equal to one third of the length of the cover plate; the first portion comprises a first gap formed by the at least one of the side wall of the second concave portion or the circumferential side portion through the groove; the circumferential side portion of the cover plate has a notch matched with the groove, and the notch is configured to be formed at an end portion of the cover plate; and the second portion comprises a second gap formed by the cover plate and the base plate through the notch.

10. The electrically operated valve of claim 8 , wherein a main component of a material of at least the ventilation portion of the waterproof and breathable membrane is expanded polytetrafluoroethylene.

11. The electrically operated valve of claim 1 , wherein
the box body comprises a first side wall and a third side wall which are disposed opposite to each other and a second side wall and a fourth side wall which are disposed opposite to each other,
the circuit board assembly comprises a first group of connecting holes, a second group of connecting holes and a third group of connecting holes, and
the electrically operated valve further comprises a plurality of pins, and the plurality of pins comprise:
a first group of pins disposed close to the first side wall, fixed to the box body, and electrically connected to the circuit board assembly; wherein each of the first group of pins comprises a first press-fitting portion, the first press-fitting portion is provided with a first needle eye, and the first press-fitting portion is pressed into a respective one o

Assignees

• Zhejiang Sanhua Intelligent Controls Co Ltd

Inventors

• Zhang Rongrong
• Zha Dazhao
• Lu Yingchong
• Zhou Lei

Classifications

• H02K5/225

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• F16K31/508 Primary

  the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element · CPC title

• H02K7/06

  Means for converting reciprocating motion into rotary motion or vice versa · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• F16K24/04

  for venting only (F16K24/02 takes precedence) · CPC title