KR101175926B1 - Normal open steam valve - Google Patents

Abstract

PURPOSE: A steam discharge valve opened normally is provided to reduce power consumption by reducing a load for descending a plunger. CONSTITUTION: A steam discharge valve opened normally comprises a main body(10), a diaphragm(20), a plunger unit(30), a coil unit(40), and a steam discharge tube(50). An orifice(11) and an outlet are formed in the main body. The diaphragm is installed on the top of the main body and opens and closes the orifice. The plunger unit is coupled to the diaphragm and is ascended and descended. The coil unit is installed to surround the edge of the plunger unit and descends the plunger unit. The steam discharge tube is connected to the outlet of the main body.

Description

Normally Open Steam Discharge Valve {NORMAL OPEN STEAM VALVE}

The present invention relates to a normally open steam discharge valve, and more particularly, in the steam discharge valve that is opened and closed according to the steam pressure in the cooker when cooking food such as rice using an electric rice cooker, the power supply is blocked The present invention relates to a normally open steam discharge valve which prevents the internal pressure of the rice cooker from being excessively increased by opening the valve.

In general, an electric rice cooker is used to cook food such as rice, and the electric rice cooker is usually provided with a control valve and a steam discharge valve to control the steam pressure in the rice cooker. It is a valve for discharging steam generated during cooking to the outside of the rice cooker, and the vapor pressure discharging valve is a valve for discharging residual steam in the rice cooker when the steam pressure inside the rice cooker is more than necessary or when cooking is completed. .

The control valve is generally provided with a weight, such as a weight to keep the valve closed by the weight of the weight, when the steam pressure in the rice cooker rises above a certain pressure during food cooking steam will reduce the weight of the weight Overcoming, the valve opens and steam is released out of the cooker.

In addition, the steam discharge valve is a valve that is normally opened and closed by using a solenoid, the steam pressure inside the rice cooker is more than necessary or discharges residual steam inside the cooker when cooking is completed, the steam discharge valve is not supplied power to the solenoid coil If it is not, the OPEN state is maintained and the steam discharge passage is opened. The steam in the rice cooker is freely discharged to the outside. When power is supplied to the solenoid coil, the steam discharge passage is closed to block the steam discharge passage. Steam emissions are blocked.

As a normally open steam discharge valve used in such an electric rice cooker, valves of various structures are used. An example thereof is a normally open valve device for steam discharge of a cooking pressure cooker disclosed in Korean Utility Model No. 2000-21110. have.

The vapor discharge valve disclosed in this document has an installation hole formed in a lid as shown in Fig. 1, and a male screw portion 111 for being inserted into the installation hole and fastened by a nut and formed at the bottom thereof, An orifice 112 is formed, the lower body which is formed to extend through the support 110 and having a diaphragm chamber 121 therein and connected to the vapor discharge pipe through the enclosure and penetrated on one side ( 120); A solenoid valve 100 installed at the center upper surface of the lower body 120 and opened / closed according to a signal from the controller; The orifice 112 is installed in the lower portion of the solenoid valve 100 and is operated according to the internal pressure passing through the orifice 112 while opening and closing the outlet of the orifice 112 communicating with the inside of the pressure vessel. The diaphragm chamber 121 is installed in the diaphragm chamber 121 to prevent the vapor and the liquid from coming into contact. The solenoid valve 100 includes a housing 130 and a coil unit 131 installed inside the housing 130. And a housing cover 132 for covering the coil part 131, a core 133 provided between the coil part 131, and a diaphragm fixing part 134 disposed below the core 133. The seat portion 136 integrally formed with the fixed diaphragm 135, the seat fixing portion 137 for fixing the sheet portion 136, and the seat fixing portion 137 is installed in contact with the linear movement A force transmission rod 160; A second elastic body 138 for pushing the force transmission rod 160 with a constant force, a plunger 139 for supporting the force transmission rod 160 and the second elastic body 138, and the plunger 139 It consists of a plunger nut 140 screwed to one end of the, when the pressure inside the electric cooker by a structure of such a solenoid valve is more than a predetermined pressure relief is opened (Relief Open), the steam inside the cooker is discharged to the outside, In the state where the power is cut off, the plunger is lifted up and opened by the elastic force.

However, the normally open steam discharge valve having the structure as described above has a complicated structure because the two elastic bodies made of the first and second elastic bodies are installed inside the valve, and the valve is opened and closed by the elastic force combination of the first and second elastic bodies. Since the characteristics must be maintained, the requirements for machining and assembling the plunger, the core and the shaft, which are related parts including two elastic bodies, are difficult, which causes a problem of increasing the defective rate of the valve. In addition, since the elastic force between the first elastic body and the second elastic body acts oppositely, it is a factor that mutually exerts a load when the valve is opened and closed, and also decreases the accuracy of the opening and closing operation.

In addition, in order to operate the plunger supporting the second elastic body 138, a force for overcoming the elastic force of the second elastic body has to be added, so that the power consumption of the coil for operating the plunger is large.

The present invention has been made to solve the problems of the conventional normally open steam discharge valve as described above, the normally open valve can perform the opening and closing operation with only one elastic body, the structure is simple to prevent the malfunction of the opening and closing operation It is an object of the present invention to provide a normally open steam discharge valve that can reduce the power consumption for operating the plunger.

The present invention provides an orifice for discharging steam and a main body formed with an outlet; A diaphragm installed on an upper surface of the main body and opening and closing the orifice; A plunger unit coupled to the diaphragm to move up and down; A steam discharge valve is installed to surround the plunger unit, and includes a coil unit for lowering the plunger unit and a vapor discharge tube connected to the discharge port, wherein the main body protrudes upward along the circumference of the orifice. A cylindrical seat portion having a plurality of support protrusions formed therein, the diaphragm being in contact with the orifice, and having a coupling groove coupled to the plunger unit; A floating part formed of a disc shape along the periphery of the sheet part and supported by the support protrusion; It is formed around the flow portion and is fixed to the main body, the plunger unit is a stopper; A plunger installed on an upper surface of the stopper to move up and down; An elastic spring installed inside the plunger; One end is elastically supported by the elastic spring and the other end is achieved by a shaft protruding through the stopper.

On the other hand, it is formed around the flow portion and is fixed to the main body, the reinforcing ribs for elastically raising the sheet portion pressed by the plunger unit may be formed radially around the sheet portion. .

In addition, the plunger may be provided with an adjustment screw for adjusting the elastic force of the elastic spring, the induction groove is formed radially on the upper surface of the coil unit, the conical guide projection protruding downward on the bottom surface of the seat portion is formed. Can be implemented.

According to the present invention, a plurality of reinforcing ribs formed on the diaphragm and a support protrusion protruding around the orifice to support the bottom of the flow portion replace the function of the elastic body for opening the valve, and as a result, compared to the conventional normally open steam discharge valve. The relatively small number of assemblies facilitates assembly and disassembly, while at the same time reducing the load for lowering the plunger, thereby reducing power consumption.

And it is easy to manufacture because there is no need to provide a space for installing the elastic spring between the plunger and the coil unit.

1 is a cross-sectional view showing an example of a conventional normally open steam discharge valve;
Figure 2 is a perspective view showing an example of the normally open steam discharge valve according to the present invention,
3 is an isolated perspective view of FIG. 2;
4 is a perspective view of a main body according to the present invention;
5 is a perspective view showing a diaphragm according to the present invention,
6 is a sectional view showing a plunger unit according to the present invention;
7 is a cross-sectional view showing another embodiment of the plunger unit according to the present invention;
8 is a perspective view showing an example of a coil unit according to the present invention;
Figure 9 (a, b) is a use state showing the operation of the normally open steam discharge valve according to the invention,
10 is a use state diagram showing a state in which the normally open steam discharge valve is opened in accordance with the present invention.

Hereinafter, the configuration and operation of the present invention through the accompanying drawings showing a preferred embodiment of the invention in more detail.

The present invention relates to a normally open steam discharge valve installed in the electric rice cooker to discharge the steam inside the cooker generated during cooking, the normally open steam discharge valve of the present invention as shown in Figures 2 and 3 ), The diaphragm 20, the plunger unit 30, the coil unit 40 and the vapor discharge tube 50, wherein the diaphragm 20 is the seat portion 21 and the flow portion 22 and the fixed portion ( 23).

The main body 10 is installed between the cover and the lid of the rice cooker, the structure is formed in the center so that the steam inside the rice cooker is discharged to the outside orifice 11 is communicated with the inside of the rice cooker is formed; On the upper side of the orifice 11, a discharge port 12 is formed so that the steam passing through the orifice 11 is discharged to the outside, the discharge port 12 is in communication with the steam discharge tube 50 to be described later .

In the periphery of the orifice 11, a concave groove is formed to prevent the condensed water or the solid formed by condensation or solidification of the steam discharged from the cooker from blocking the orifice 11 or the outlet 12.

A plurality of support protrusions 13 are formed radially along the circumference of the orifice 11, and the support protrusions 13 are configured to support the bottom surface of the flow part 22.

The support protrusion 13 supports the bottom surface of the flow portion 22 when the flow portion 22 is lowered by the lowering operation of the seat portion 21, and as a result, the flow portion 22 is further restored. It is easy.

The diaphragm 20, which is fixed to the upper portion of the main body 10 and selectively contacts the orifice 11, opens and closes the vapor discharge flow path, is made of a flexible material such as a rubber material, and a central part thereof has a plunger unit 30 described later. Is pressed against the top of the orifice (11).

In more detail, the diaphragm 20 of the present invention has a cylindrical seat portion 21 selectively contacting the orifice 11 as shown in FIG. 5, and the upper portion of the seat portion 21. Flow portion 22 made of a flexible material having a curved surface portion concave down along the outer periphery of the seat portion 21, and formed in a circular ring shape along the outer periphery of the flow portion 22 and the main body 10 It is composed of a fixing portion 23 fixed to the, wherein the flow portion 22 located between the seat portion 21 and the fixing portion 23 is elastically the seat portion 21 pressed by the plunger unit 30 The reinforcing ribs 22A are raised radially around the sheet portion 21.

In addition, an inverse 'T' shaped coupling groove 21A is formed in the center of the cylindrical seat portion 21 so that the diaphragm 20 may be coupled to the plunger unit 30.

The holder 24 is positioned on the upper portion of the diaphragm 20. The holder 24 is for fixing the fixing part 23 of the diaphragm 20 to the upper surface of the main body 10. ) Is formed in a disc shape in which a through hole is formed in the center, and the bottom surface of the holder 24 has a width substantially equal to the width of the fixing part 23 so as to fix the fixing part 23 of the diaphragm 20. It has a flat plate shape.

The diaphragm 20 of the present invention having the structure as described above is installed so that the bottom surface of the seat portion 21 is spaced apart from the upper surface of the orifice 11 by a predetermined interval so that when the power is supplied to the valve, the plunger unit 30 moves downward. The seat portion 21 is pressurized, whereby the flow portion 22 made of a flexible material is deformed, and the seat portion 21 is lowered to be in close contact with the upper surface of the orifice 11 to block steam discharge. When the power supply is cut off, the lowering pressure of the plunger unit 30 is released and the seat portion 21 is raised by the elastic restoring force of the flow portion 22 so that the bottom surface of the seat portion 21 is spaced apart from the upper surface of the orifice 11 by a predetermined distance. Return to the spaced apart position, and as a result, the valve is opened, the steam is discharged.

On the other hand, the steam discharged from the cooker can be attached to the lower surface of the seat portion 21 is condensed, solidified, in this case, the accuracy and airtight performance of the valve operation may be lowered, but the present invention is to solve the problem Conical guide projections 21B protruding downward from the bottom of the portion 21 are provided, thereby condensing the steam contacting the surface of the seat portion 21, gathered at the tip of the guide projections 21B, Falling back through the orifice 11 located in the lower portion is introduced back into the cooker.

The plunger unit 30 coupled to the coupling groove 21A formed at the center of the seat portion 21 of the diaphragm 20 is operated between the main body 10 and the coil unit 40, and is installed between the main body 10 and the coil unit 40. As shown in FIG. 6, the stopper 31, the plunger 32 installed on the upper surface of the stopper 31 and being elevated, the elastic spring 33 installed inside the plunger 32, One end is elastically supported by the elastic spring 33 and the other end is composed of a shaft 34 protruding through the stopper 31, wherein the coupling groove 21A of the seat portion 21 at the lower end of the shaft 34 It is preferable that the coupling protrusion 35 is inserted into the coupling.

When the plunger unit 30 is supplied with power to the coil unit 40, the plunger 32 is lowered, and together with the shaft 34, the valve is pressed by pressing the seat 21 of the diaphragm 20. On the contrary, when the power supply is cut off, the force for lowering the plunger 32 is released, and the seat 21 is raised by the elastic restoring force of the flow part 22 to open the valve.

On the other hand, when power is supplied to the plunger unit 30 and the valve is closed in a state in which the pressure inside the cooker rises above a certain level, it is preferable that the valve has a relief open function to reduce the pressure inside the cooker. However, in the present invention, this function is achieved by the elastic spring 33 installed inside the plunger 32. That is, when the steam pressure inside the cooker is high enough to overcome the elastic force of the elastic spring 33, the shaft 34 is raised while the elastic spring 33 is compressed by the steam pressure, and as a result, the upper surface of the orifice 11 As the seat portion 21 positioned is also raised, the relief opening function is achieved by opening the vapor discharge flow path between the seat portion 21 and the orifice 11.

When the steam inside the rice cooker is discharged to a certain degree and the proper pressure is again, the shaft 34 is lowered again by the elastic restoring force of the compressed elastic spring 33 so that the seat 21 is in close contact with the upper surface of the orifice 11. The steam discharge passage is closed.

Meanwhile, in the present invention, as shown in FIG. 8, an adjustment screw 32A may be provided on the plunger 32 to adjust the magnitude of the pressure of the relief opening. The adjustment screw 32A may be appropriately loosened or tightened. When the elastic force of the elastic spring 33 is adjusted, as a result of which the magnitude of the pressure of the relief opening is adjusted.

The coil unit 40, which is installed to surround the plunger unit 30 and is excited by power supply, has a through hole H formed at the center thereof, as shown in FIG. The plunger unit 30 is installed in the structure, and when the power is supplied to the coil unit 40, the plunger unit 30 is operated to lower.

And the bottom surface of the coil unit 40 is coupled to the upper surface of the main body 10, the mounting plate 42 for fixing the diaphragm 20 by pressing the upper surface of the holder 24 is provided, the upper surface of the coil unit 40 In the guide groove 41 to guide the discharge of the condensed water condensed on the upper surface of the coil unit 40 is formed radially.

The sleeve 43A is inserted into the through hole H, and the plunger 32 is inserted into the sleeve 43A. The outer surface of the plunger 32 has an outer diameter relatively larger than that of the through hole H. Branch cover 43 is provided, the through hole (H) is not exposed to the outside by the cover 43, as a result condensed water condensed in the upper portion of the coil unit 40 does not flow into the through hole (H) Do not.

Steam outlet tube 50 is connected to the outlet 12 of the main body 10, whereby the steam passing through the orifice 11 is discharged to the outside, this steam outlet tube 50 is shown in FIG. As it is coupled to the side of the main body 10, the outlet 12 and the flow path is connected, the other end is connected to the outside of the container.

Hereinafter, the operation of the normally open steam discharge valve of the present invention having the structure as described above will be described.

In the normally open steam discharge valve of the present invention, as shown in FIG. 9 (a), when the power is cut off, the plunger 32 is raised to open the steam discharge passage, and when the power is supplied, FIG. As shown in FIG. 2), the plunger 32 is lowered to press the seat 21, whereby the seat 21 is in close contact with the upper end of the orifice 11 to block the vapor discharge passage.

When the power is cut off, the plunger 32 and the sheet portion 21 are moved by the reinforcing ribs 22A of the flow portion 22 that elastically supports the sheet portion 21 while the lowering pressure for lowering the plunger 32 is released. It returns to its original position.

In addition, if the plunger 32 is lowered and the pressure inside the cooker is excessively increased while the flow path of the valve is blocked, as shown in FIG. 10, the pressure of steam is concentrated on the seat 21 to elastically plunger 32. The supporting elastic spring 33 is compressed, and as a result, the shaft 34 is independently lifted so that the flow path of the orifice 11 is discharged to lower the pressure inside the cooker to perform a relief opening function.

As described above, in the present invention, a plurality of reinforcing ribs 22A are formed in the flow portion 22 of the diaphragm 20 without using two elastic springs, and at the same time, support protrusions are provided on the bottom surface of the flow portion 22. Since the flow part 22 is supported and the seat part 21 is elastically restored easily, as a result, the structure of the valve can be simplified and the power consumption required to operate the plunger can be reduced.

10: body 11: orifice
12: outlet 13: support protrusion
20: diaphragm 21: seat portion
21A: Coupling groove 21B: Guide protrusion
22: flow part 22A: reinforcing rib
23: fixing part 24: holder
24A: Through Hole 30: Plunger Unit
31: stopper 32: plunger
32A: Adjustment screw 33: Elastic spring
34: shaft 35: engaging projection
40: coil unit 41: induction groove
42: seating plate 43: cover
43A: Sleeve 50: Steam Exhaust Tube
H: through hole

Claims (4)

A main body 10 having an orifice 11 and an outlet 12 through which steam is discharged; A diaphragm 20 installed on an upper surface of the main body 10 to open and close the orifice 11; A plunger unit 30 coupled to the diaphragm 20 to move up and down; The steam discharge valve is installed to surround the plunger unit 30 and includes a coil unit 40 for lowering the plunger unit 30 and a steam discharge tube 50 connected to the discharge port 12. To
The main body 10 is formed with a plurality of support protrusions 13 protruding upward along the circumference of the orifice 11,
The diaphragm 20 is in contact with the orifice 11 and has a cylindrical seat portion 21 having a coupling groove 21A coupled to the plunger unit 30; A flow part 22 formed of a disc shape along a circumference of the sheet part 21 and supported by the support protrusion 13; It is formed around the flow portion 22 and consists of a fixing portion 23 fixed to the main body 10,
The plunger unit 30 includes a stopper 31; A plunger 32 installed on an upper surface of the stopper 31 to move up and down; An elastic spring 33 installed inside the plunger 32; One end is elastically supported by the elastic spring 33, the other end is a normally open steam discharge valve, characterized in that consisting of a shaft (34) protruding through the stopper (31).
The method according to claim 1,
The flow portion 22 is always characterized in that the reinforcing ribs 22A for elastically raising the seat portion 21 pressed by the plunger unit 30 is formed radially around the seat portion 21. Open steam release valve.
The method according to claim 1,
The plunger 32 is a normally open steam discharge valve, characterized in that the adjustment screw (32A) for adjusting the elastic force of the elastic spring (33) is provided.
The method according to claim 1 or 2,
Normally open steam discharge valve, characterized in that the bottom surface of the seat portion 21 is formed with a conical guide protrusion (21B) protruding downward.

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