CN203214969U - One-way thermal expansion valve - Google Patents
One-way thermal expansion valve Download PDFInfo
- Publication number
- CN203214969U CN203214969U CN 201320217399 CN201320217399U CN203214969U CN 203214969 U CN203214969 U CN 203214969U CN 201320217399 CN201320217399 CN 201320217399 CN 201320217399 U CN201320217399 U CN 201320217399U CN 203214969 U CN203214969 U CN 203214969U
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- valve body
- valve
- spool
- bellows
- inner cavity
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- Expired - Fee Related
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Abstract
The utility model relates to a one-way thermal expansion valve and belongs to the field of refrigerating fittings. The one-way thermal expansion valve comprises a valve body, a spool, a temperature sensing tube, a spring, a diaphragm box and a diaphragm. An inner cavity of the valve body is provided with a valve hole fitting with the spool. The lower end of the valve body is provided with an inlet, and the side of the valve body is provided with an outlet. The outlet is higher than the valve hole. The valve body is provided with a return gas pressure tube which is communicated with the inner cavity of the valve body. The top end of the valve body is provided with a through hole. The diaphragm box is mounted at the top end of the valve body. The diaphragm disposed in the inner cavity of the diaphragm divides the inner cavity into an upper inner cavity and a lower inner cavity. The bottom of the diaphragm is connected with the spool through a stem. The temperature sensing tube is connected with the upper inner cavity of the diaphragm box through a capillary tube. The lower inner cavity of the diaphragm box is communicated with the inner cavity of the valve body. The spring is mounted at the lower end of the spool. The spool is provided with a central through hole. A partition is disposed in the central through hole, and one side of the outer peripheral surface of the partition is fixed to the inner wall of the central through hole. The one-way thermal expansion valve has the advantages that when thermal sensing agent leaks, the partition in the through hole can automatically open to allow refrigerant to pass through the through hole, and accordingly the valve operates normally.
Description
Technical field
The utility model belongs to refrigeration accessory field, and is especially relevant with a kind of structure of unidirectional heating power expansion valve.
Background technique
Existing unidirectional heating power expansion valve comprises valve body, spool, the temperature-sensitive pipe, spring, bellows and diaphragm, body cavity is provided with the valve opening that cooperates with spool, valve opening is cone shape hole, the upper end open internal diameter of valve opening is less than the lower ending opening internal diameter, the lower end of valve body is provided with import, the sidepiece of valve body is provided with outlet, the position of outlet is higher than the position of described valve opening, valve body is provided with the back pressure pipe, the back pressure pipe is communicated with body cavity, the top of valve body is provided with through hole, and bellows is fixedly installed in the top of valve body, and the bellows inner chamber arranges diaphragm the bellows inner chamber is divided into inner chamber and lower inner cavity, fixedly connected by valve rod with spool in the bottom surface of diaphragm, the temperature-sensitive pipe is connected with the last inner chamber of bellows by capillary tube, and the lower inner cavity of bellows is communicated with the inner chamber of valve body, and spring is fixedly installed in the lower end of spool.When the temperature-sensitive pipe is experienced the back pressure rising of refrigeration system, the pressure of inner chamber increases on the bellows, this moment, the diaphragm applied force distortion pressed down, the drive valve rod moves downward, gap between spool and the valve opening increases at this moment, refrigerant flow increases, this moment, the bottom of spool contacted with spring, spring stress presses down, when the active force of inner chamber equates with spring force and back pressure pipe active force on the bellows by the time, spool stops to move downward, thereby reaches equinoctial point again, and heating power expansion valve is proper functioning again; When the temperature-sensitive pipe is experienced the back pressure reduction of refrigeration system, otherwise.When leaking appears in the temperature sensing agent in the existing bellows, the pressure vanishing of inner chamber on the bellows, the thrust that this moment, spool was formed by back pressure pipe and spring is pushed on the valve opening, the spool of heating power expansion valve and valve opening closure, thus cause refrigeration system normally to work on.
The model utility content
Defective that can't proper functioning when the purpose of this utility model is intended to overcome temperature sensing agent in the bellows in the existing unidirectional heating power expansion valve and occurs leaking provides a kind of heating power expansion valve that can proper functioning after occurring leaking.
For this reason, the utility model is by the following technical solutions: a kind of unidirectional heating power expansion valve, comprise valve body, spool, the temperature-sensitive pipe, spring, bellows and diaphragm, body cavity is provided with the valve opening that cooperates with spool, valve opening is cone shape hole, the upper end open internal diameter of valve opening is less than the lower ending opening internal diameter, the lower end of valve body is provided with import, the sidepiece of valve body is provided with outlet, and the position of outlet is higher than the position of described valve opening, and valve body is provided with the back pressure pipe, the back pressure pipe is communicated with body cavity, the top of valve body is provided with through hole, and bellows is fixedly installed in the top of valve body, diaphragm is set in the bellows inner chamber bellows inner chamber is divided into inner chamber and lower inner cavity, fixedly connected by valve rod between the bottom surface of diaphragm and the spool, the temperature-sensitive pipe is connected with the last inner chamber of bellows by capillary tube, and the lower inner cavity of bellows is communicated with the inner chamber of valve body, and spring is fixedly installed in the lower end of spool, it is characterized in that, described spool is provided with central through bore, is provided with dividing plate in the central through bore, and a side of dividing plate outer circumferential face and the inwall of central through bore are fixed.
As to technique scheme replenish and perfect, the utility model also comprises following technical characteristics.
In the described bellows lower inner cavity limiting stopper is set, limiting stopper is fixed on the valve rod, the displacement of restriction spool.
In the utility model when work,, because the through hole of spool is provided with dividing plate, heating power expansion valve is when proper functioning, and the pressure of bellows inner chamber equates that with pressure in the body cavity dividing plate is in closed condition; When leaking appears in the temperature sensing agent in the bellows, the pressure vanishing of inner chamber on the bellows, the thrust that this moment, spool was formed by back pressure pipe and spring is pushed on the valve opening, this moment, valve opening was closed, dividing plate is owing to be subjected to thrust upwards, dividing plate on the valve core through hole is opened, and refrigeration agent enters in the through hole, thereby flows out outlet.By rational through hole internal diameter size is set, make heating power expansion valve energy proper functioning after leakage.
Use the utility model can reach following beneficial effect: the utility model is by arranging through hole at spool, be provided with dividing plate in the through hole, when leaking appearred in the temperature sensing agent in the bellows, the dividing plate in the through hole can be opened automatically, thereby refrigeration agent passes through proper functioning from through hole.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
As shown in Figure 1, the utility model comprises valve body 6, spool 9, temperature-sensitive pipe 5, spring 8, bellows 1 and diaphragm 2, body cavity is provided with the valve opening that cooperates with spool 9, valve opening is cone shape hole, the upper end open internal diameter of valve opening is less than the lower ending opening internal diameter, the lower end of valve body 6 is provided with import 7, the sidepiece of valve body is provided with outlet 4, the position of outlet is higher than the position of described valve opening, valve body 6 is provided with back pressure pipe 10, the back pressure pipe is communicated with body cavity, the top of valve body is provided with through hole, bellows 1 is fixedly installed in the top of valve body 6, diaphragm 2 is set in the bellows inner chamber bellows inner chamber is divided into inner chamber and lower inner cavity, fixedly connected by valve rod 14 between the bottom surface of diaphragm 2 and the spool 9, temperature-sensitive pipe 5 is connected with the last inner chamber of bellows 1 by capillary tube 3, the lower inner cavity of bellows 1 is communicated with the inner chamber of valve body 6, spring 8 is fixedly installed in the lower end of spool 9, spool 9 is provided with central through bore 12, be provided with dividing plate 11 in the central through bore, a side of dividing plate outer circumferential face and the inwall of central through bore 12 are fixed, and limiting stopper 13 is set in the bellows lower inner cavity, limiting stopper 13 is fixed on the valve rod 14, the displacement of restriction spool 9.
In the utility model when work,, because the through hole of spool 9 is provided with dividing plate 11, heating power expansion valve is when proper functioning, and the pressure of bellows inner chamber equates that with pressure in the body cavity dividing plate 11 is in closed condition; When leaking appears in the temperature sensing agent in the bellows 1, the pressure vanishing of inner chamber on the bellows, the thrust that this moment, spool 9 was formed by back pressure pipe 10 and spring 8 is pushed on the valve opening, this moment, valve opening was closed, dividing plate 11 is owing to be subjected to thrust upwards, dividing plate 11 on the valve core through hole 12 is opened, and refrigeration agent enters in the through hole, thereby flows out outlet 4.By rational through hole internal diameter size is set, make heating power expansion valve energy proper functioning after leakage.
Claims (2)
1. unidirectional heating power expansion valve, comprise valve body (6), spool (9), temperature-sensitive pipe (5), spring (8), bellows (1) and diaphragm (2), body cavity is provided with the valve opening that cooperates with spool (9), valve opening is cone shape hole, the upper end open internal diameter of valve opening is less than the lower ending opening internal diameter, the lower end of valve body (6) is provided with import (7), the sidepiece of valve body is provided with outlet (4), the position of outlet is higher than the position of described valve opening, valve body (6) is provided with back pressure pipe (10), back pressure pipe (10) is communicated with body cavity, the top of valve body is provided with through hole, bellows (1) is fixedly installed in the top of valve body (6), diaphragm (2) is set in the bellows inner chamber bellows inner chamber is divided into inner chamber and lower inner cavity, fixedly connected by valve rod (14) between the bottom surface of diaphragm (2) and the spool (9), temperature-sensitive pipe (5) is connected with the last inner chamber of bellows (1) by capillary tube (3), the lower inner cavity of bellows (1) is communicated with the inner chamber of valve body (6), spring (8) is fixedly installed in the lower end of spool (9), it is characterized in that: described spool (9) is provided with central through bore (12), be provided with dividing plate (11) in the central through bore, the inwall of a side of dividing plate outer circumferential face and central through bore (12) is fixed.
2. a kind of unidirectional heating power expansion valve according to claim 1, it is characterized in that: limiting stopper (13) is set in the described bellows lower inner cavity, and limiting stopper (13) is fixed on the valve rod (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320217399 CN203214969U (en) | 2013-04-25 | 2013-04-25 | One-way thermal expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320217399 CN203214969U (en) | 2013-04-25 | 2013-04-25 | One-way thermal expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214969U true CN203214969U (en) | 2013-09-25 |
Family
ID=49204508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320217399 Expired - Fee Related CN203214969U (en) | 2013-04-25 | 2013-04-25 | One-way thermal expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203214969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889576A (en) * | 2014-12-11 | 2016-08-24 | 西安航天发动机厂 | High-sensitivity one-way valve |
-
2013
- 2013-04-25 CN CN 201320217399 patent/CN203214969U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889576A (en) * | 2014-12-11 | 2016-08-24 | 西安航天发动机厂 | High-sensitivity one-way valve |
| CN105889576B (en) * | 2014-12-11 | 2019-07-23 | 西安航天发动机厂 | Highly sensitive check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 Termination date: 20160425 |