CN202056350U - Four-way reversing valve - Google Patents
Four-way reversing valve Download PDFInfo
- Publication number
- CN202056350U CN202056350U CN2011201193855U CN201120119385U CN202056350U CN 202056350 U CN202056350 U CN 202056350U CN 2011201193855 U CN2011201193855 U CN 2011201193855U CN 201120119385 U CN201120119385 U CN 201120119385U CN 202056350 U CN202056350 U CN 202056350U
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- CN
- China
- Prior art keywords
- valve
- valve body
- piston
- way reversing
- oil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a four-way reversing valve belonging to valves capable of changing the flowing direction of refrigerants. The four-way reversing valve aims to solve the defect that after the existing four-way reversing valve is shut down, an oil film is easy to be cleaned and taken away by refrigerants to cause the lack of lubricating oil, thereby jamming a piston. The four-way reversing valve mainly comprises a main valve and a guide valve, wherein the guide valve is communicated with a cavity of the main valve through an air guide tube; the main valve comprises a valve body, a piston arranged in the valve body and two end covers arranged at the two ends of the valve body; four valve ports are arranged on the valve body; an oil shaft sleeve is arranged between the inner surface of the valve body and the piston and is fixedly connected with the valve body; and a through hole which is corresponding to and is communicated with the valve port is arranged on the oil shaft sleeve. The four-way reversing valve adopts the oil shaft sleeve to lubricate the movement of the piston so as to ensure that the piston flexibly moves in the valve body and can not be jammed, thereby prolonging the service life.
Description
Technical field
The utility model belongs to the valve that changes the refrigeration working medium flow direction in a kind of refrigeration system, and is especially relevant with a kind of four-way change-over valve.
Background technique
Big capacity four-way change-over valve generally is applied in the heat pump type air conditioner.Common refrigeration system is made up of pilot valve and main valve with four-way change-over valve, main valve comprises steel valve body, be positioned at the spheroidal graphite cast iron piston of valve body and be arranged at two end caps at valve body two ends, the valve body of main valve, piston and end cap are formed left and right two cavitys, pilot valve is communicated with the cavity of main valve by air pipe, be respectively arranged with valve on the air pipe, be provided with the venting gas appliance that to close between valve and the main valve cavity; Piston mainly utilizes the inner system's pressure reduction that exists of four-way change-over valve to carry out mobile working; shut down and ambient temperature when being lower than zero degree at four-way valve; reason owing to pressure reduction; liquid refrigerant is moved to low one section of pressure from high one section of pressure; then in the refrigerant migration process; oil film in the valve body easily cooled dose of cleaning tape from; cause piston under oil-free lubrication, to move; formed the dry friction of steel and cast iron materials; after using a period of time; piston will wear and tear in valve body and pull and stuck, makes the valve can't proper functioning.
The model utility content
The purpose of this utility model be exactly to overcome after the shutdown that aforementioned four-way change-over valve exists oil film easily cooled dose of cleaning tape provide a kind of and can guarantee the piston four-way change-over valve flexibly that in valve body, moves from causing the defective that lacks lubricant oil and make seizure of piston.
For this reason, the utility model is by the following technical solutions: a kind of four-way change-over valve, mainly form by main valve and pilot valve, pilot valve is communicated with the cavity of main valve by air pipe, main valve comprises valve body, be arranged at piston and two end caps that are arranged at the valve body two ends in the valve body, four valve ports are set on the valve body, piston is I-shaped member rotation 90 degree that stagger by two view shapes and is connected as a single entity and constitutes, it is characterized in that: between described valve interior surface and the described piston oilite bushing is set, this oilite bushing is fixedlyed connected with valve body, and oilite bushing is provided with through hole corresponding with described valve port and that be communicated with.Oilite bushing is the sintering body of making of powder metallurgic method, utilizes the porosity of sintering body, makes it impregnation 10%～40% (volume fraction) lubricant oil, in fuel feeding state use down voluntarily, has self-lubricating function, and wear resistance and rust protection are good.During running, the axle sleeve temperature raises, because the expansion coefficient of oil is bigger than metal, thereby enters slidingsurface automatically piston motion is lubricated, and oil is again with the temperature sucked back hole that descends when quitting work.
As to technique scheme replenish and perfect, the utility model also comprises following technical characteristics:
Described oilite bushing is a copper base oilite bushing, also can be the iron-based oilite bushing, can also be copper iron-based oilite bushing.
Use the utility model can reach following beneficial effect: by the oilite bushing with self-lubricating function is set between valve body and piston, by oilite bushing piston motion is lubricated, avoided producing dry friction between piston and the valve body, the assurance piston moves in valve body flexibly can be not stuck, increased the working life of four-way change-over valve.
Description of drawings
Fig. 1 is a plan view of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 2.
Fig. 4 is the main apparent direction sectional view of oilite bushing of the present utility model.
Fig. 5 is the left apparent direction sectional view of oilite bushing of the present utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
As Fig. 1～shown in Figure 5, the utility model mainly is made up of main valve and pilot valve 4, pilot valve 4 is communicated with the cavity of main valve by air pipe 3, main valve comprises valve body 1, be arranged at piston 7 and two end caps 2 that are arranged at the valve body two ends in the valve body, four valve ports 6 are set on the valve body 1, piston 7 is I-shaped member rotation 90 degree that stagger by two view shapes and is connected as a single entity and constitutes, between valve body 1 internal surface and the piston 7 oilite bushing 5 is set, oilite bushing 5 is fixedlyed connected with valve body 1, oilite bushing 5 is provided with and the valve port 6 corresponding through holes 8 that also are communicated with, and oilite bushing is a copper base oilite bushing.Piston slides in oilite bushing cover intracoelomic cavity, and solid lubricant can have been avoided producing dry friction between piston and the valve body to the piston lubricate under no oily situation.
In the above-mentioned mode of execution, oilite bushing can also be the iron-based oilite bushing, or copper iron-based oilite bushing.
Claims (1)
1. four-way change-over valve, mainly form by main valve and pilot valve (4), pilot valve (4) is communicated with the cavity of main valve by air pipe (3), main valve comprises valve body (1), be arranged at the piston (7) in the valve body (1) and be arranged at two end caps (2) at valve body two ends, four valve ports (6) are set on the valve body (1), piston (7) is I-shaped member rotation 90 degree that stagger by two view shapes and is connected as a single entity and constitutes, it is characterized in that: between described valve body (1) internal surface and the described piston (7) oilite bushing (5) is set, oilite bushing (5) is fixedlyed connected with valve body (1), and oilite bushing (5) is provided with through hole (8) corresponding with described valve port (6) and that be communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201193855U CN202056350U (en) | 2011-04-21 | 2011-04-21 | Four-way reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201193855U CN202056350U (en) | 2011-04-21 | 2011-04-21 | Four-way reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202056350U true CN202056350U (en) | 2011-11-30 |
Family
ID=45016322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201193855U Expired - Fee Related CN202056350U (en) | 2011-04-21 | 2011-04-21 | Four-way reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202056350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162543A (en) * | 2011-04-21 | 2011-08-24 | 浙江新三荣制冷有限公司 | Four-way reversing valve for refrigerating system |
-
2011
- 2011-04-21 CN CN2011201193855U patent/CN202056350U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162543A (en) * | 2011-04-21 | 2011-08-24 | 浙江新三荣制冷有限公司 | Four-way reversing valve for refrigerating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20140421 |