KR19990023980U - Steam discharge device of electric pressure cooker - Google Patents

Abstract

The present invention is an outer case (3) forming an outer body, a cylindrical coil assembly (5) mounted inside the outer case (3), the vertical movable tube is installed in the axial direction along the hollow portion of the coil assembly (5) (7) and a steam provided with a bushing (13) in which a through hole (11) is formed on an axis so that the upper and lower movable pipes (7) penetrate into the upper end of the outer case (3), and are formed through the central portion. In the discharge device (1), a pressure-adhesive packing (21) is attached to the outer circumferential surface of the upper and lower movable tubes (7) in the circumferential direction to seal the gap (A) between the upper and lower movable tubes (7) and the bushing (13). A steam discharge device for an electric pressure cooker, which is configured to seal a gap (A) between an upper and lower movable tube (7) and a bushing (13) by a pressure tight packing (21) having a hydraulic pressure groove (21). 1) When the steam is ejected from the discharge nozzle 19 when opened, the gap (A) To penetrate into the rail solenoid valve 4 is a so as to prevent the corrosion or the like spring 10.

Description

Steam discharging device of electric pressure rice cooker

The present invention relates to a steam discharge device of the electric pressure cooker, and more specifically, the steam discharged from the discharge nozzle of the upper and lower movable pipe through which steam passes when the valve is opened between the support frame of the coil assembly and the locking jaw of the lower end of the movable tube. Vapor penetration prevention caps to more securely seal the gap between the movable tube and the bushing mounted on the upper side of the movable tube to prevent the bleeding into the movable tube return spring to be installed, thereby causing the malfunction of the spring. It relates to a steam discharge device having a.

In general, an electric pressure cooker is heated by heating the bottom or side of the heating pot covered with a lid to cover the inside of the rice cooker with a hot plate embedded with a heater, and then operate the warming heater to a low temperature It is a device that serves both cooking and storage by heating and maintaining a predetermined temperature. When the internal steam pressure of the heated cooker reaches a predetermined value, that is, when the cooking is completed and changed to warming, the lid of the electric pressure cooker may prevent some of the steam from the outside to prevent the danger that may occur due to the internal steam pressure. A safety valve for discharging the gas is provided.

Such an electric pressure cooker, as shown in 100 in Figure 1, generally open to the top to accommodate the rice inside the heating cooker 101, a predetermined space portion is formed, heating the bottom of the heating cooker 101 Hot plate 102 in which the heater is embedded, the upper portion of the heating cooker 101 is installed in the upper portion of the heating cooker 101 to heat to maintain the inside of the heating cooker 101 in a warm state, the upper opening of the heating cooker 101 The cover 106 which seals the inside, the heat insulation case 104 surrounding the outer part of these parts, and the lid 105 which opens and closes the upper part of this heat insulation case 104 are comprised.

Here, the lid 105 is a safety valve for natural or forced discharge of the internal steam pressure to the outside when the internal steam pressure of the heated heating cooker 101 reaches a predetermined value, that is, when the cooking is completed to change to warmth ( 107).

The safety valve 107 is in communication with the cover 106 of the heating cooker 101 and is installed to enable the opening and closing on the steam discharge pipe 107a protruding to the upper portion of the lid 105 and the upper end of the steam discharge pipe 107a. When the internal steam pressure of the heating cooker 101 reaches a predetermined value, the weight of the steam cooker 107b opens the steam discharge pipe 107a by the steam pressure. In addition, when the steam discharge pipe 107a of the safety valve 107 is not blocked or operated, the steam discharge device 110 to discharge the steam pressure to the outside by operating the solenoid valve electrically in accordance with the set internal steam pressure of the heating cooker. Is provided.

Here, the steam discharge device 110 of the electric pressure cooker will be described briefly with reference to FIG. 2.

As shown in FIG. 2, the conventional steam discharging device 110 is mounted between the lid 105 of the electric pressure cooker shown in FIG. 1 and the cover 106 of the heating cooker, and is attached to the outer case 111. Is surrounded by. The lower cap 117 is inserted into the opening formed in the lower surface of the case 111, and the bushing 121 having a through hole formed in the center thereof is inserted into the opening formed in the upper surface. In addition, a steam outlet cap 112 is attached to the upper portion of the case 111 to prevent the steam discharged from the inside of the heating cooker 101 to be directly injected.

Inside the case 111, a diaphragm 123 for opening and closing a coil assembly including a support frame 113 and a coil 115, a suction port 119 formed through the center of the lower cap 117, and the diaphragm ( The upper and lower movable tubes 125 are inserted into and attached to the center of the upper and lower movable tubes 125 and protrude horizontally under the upper and lower movable tubes 125. The solenoid valve 120 which consists of the return spring 129 mounted between the and the support frame 113 is comprised.

The steam discharge device 110 is a steam discharged from the nozzle 131 on the top of the bushing 121 around the discharge nozzle 131 mounted on the upper end of the up and down movable pipe 125 as shown in more detail in FIG. In order to prevent the penetration of the solenoid valve 120 through the gap between the bushing 121 and the up and down movable pipe 125 is fitted with a vapor penetration prevention cap 133 made of an injection molding.

As described above, according to the conventional steam discharging device 110, in order to withdraw the high-pressure steam generated inside the heating cooker 101 to the outside, the coil 115 of the solenoid valve 120 by the current applied from the power source. When this is excited, the diaphragm 123 at the position shown by the dotted line in FIG. 2 and the vertically movable tube 125 inserted into the central portion of the diaphragm 123 are pulled up to the position shown by the solid line.

As a result, the suction port 119 which is closed by the diaphragm 123 is opened, and the steam inside the heating cooker 101 flows into the space between the diaphragm 123 and the lower cap 117. The steam introduced in this way is discharged from the discharge nozzle 131 along the upper and lower movable tubes 125 through the steam inlet hole 135 formed through the sidewalls of the diaphragm 123 and the upper and lower movable tubes 125. The released steam impinges on the upper surface of the discharge port cap 112 and diffuses into the air through the opening between the discharge port cap 112 and the case 111.

At this time, the steam discharge device 110 infiltrate the steam on the top of the bushing 121 to prevent the steam discharged from the nozzle 131 is introduced into the interior through the gap between the bushing 121 and the vertical movable pipe 125. The prevention cap 133 is press-fitted, but the prevention of the vapor penetration performance of the prevention cap 133 made of an injection molding is reduced, so that the high-pressure steam penetrates the spring 129 through the gap in the direction of the arrow A in the drawing to the spring 129. ), The elastic repulsive force of the spring 129 is lowered, and the opening and closing performance of the solenoid valve 120 is lowered, thereby deteriorating the steam discharge performance of the steam discharge device 110, thereby causing a malfunction.

Therefore, the present invention has been devised to solve the problems of the conventional steam discharge device as described above, by sealing the gap between the up and down movable pipe and the bushing of the steam discharge device by the pressure tight packing to seal the nozzle of the vertically movable pipe. It prevents the steam emitted through the solenoid from penetrating into the solenoid and prevents the spring's elastic repulsion from deteriorating due to corrosion. The purpose is to prevent it.

1 is a schematic cross-sectional view of a conventional electric pressure cooker.

Figure 2 is a longitudinal cross-sectional view of the steam discharge device of FIG.

Figure 3 is a partial schematic cross-sectional view showing the vapor penetration prevention cap portion of FIG.

Figure 4 is a longitudinal cross-sectional view of the steam discharge device according to the present invention.

5 is a partial schematic cross-sectional view showing the vapor penetration prevention cap portion of FIG.

Explanation of symbols on the main parts of the drawings

1: steam exhaust device 3: outer case

4: solenoid valve 7: up and down movable pipe

9: lower cap 10: return spring

11 through hole 13 bushing

17: diaphragm 19: discharge nozzle

21: pressure tight packing 23: hydraulic groove

28: outlet cap 29: side wall

30: coil 33: locking jaw

In order to achieve the above object, the present invention provides an outer case forming an outer body, a cylindrical coil assembly mounted inside the outer case, an up and down movable tube axially inserted along a hollow part of the coil assembly, and an outer case upper opening. A steam discharge device having a bushing having a through hole formed on an axis thereof so as to be inserted into and fixed to an upper and lower movable tube through a central portion, wherein the pressure-adherent packing is attached to the outer peripheral surface of the upper and lower movable tubes in a circumferential direction so that the upper and lower movable tubes An object of the present invention is to provide a steam discharge device for an electric pressure cooker that is configured to seal a gap between the bushings.

Hereinafter, the steam discharge device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The steam exhaust device of the present invention is surrounded by an outer case 3 as in the conventional steam exhaust device as indicated by reference numeral 1 in FIG. 4. Inside the outer case (3) is a component that serves as a solenoid valve (4) is embedded, the bushing 13 in the upper opening, the lower cap (9) is fixed to the lower opening. A discharge port cap 28 coupled to the upper end of the bushing 13 by a threaded portion 26 machined on the outer circumferential surface of the bushing 13 is fixed, and a through hole 11 in the axial direction at the central portion of the bushing 13. Is formed.

Here, the solenoid valve 4 is again provided with a cylindrical coil assembly 5 mounted inside the outer case 3 and a vertical movable pipe 7 axially installed through the hollow portion of the coil assembly 5 and the coil. 30 and the coil housing 31. The upper and lower movable pipes 7 are pipe-shaped pipes having a steam passage 35 at the center thereof, penetrating through the bushing 13, and a steam discharge nozzle 21 is attached to the upper end thereof, and a steam inlet hole is provided on the outer peripheral surface of the lower end. 37 is formed through.

A return spring 10 is seated between the locking jaw 33 and the coil housing 31 of the upper and lower movable tubes 7, and penetrated in the center of the lower cap 9 at the lower circumferential surface of the upper and lower movable tubes 7. A diaphragm 17 for controlling the inflow of steam through the steam inlet 15 is inserted, and an outer circumferential surface of the diaphragm 17 is fitted between the lower cap 9 and the coil housing 31 to be fixed.

At this time, the pressure for sealing the gap (A) formed between the upper inner peripheral surface of the upper end of the bushing 13 and the upper outer peripheral surface of the up and down movable tube 7 which is sandwiched between the outer case 3 and the coil 30 fixed The close packing 21 is fitted, and the pressure tight packing 21 is attached to the outer circumferential surface of the up and down movable pipe 7 in the circumferential direction.

The pressure-adhesive packing 21 sealing the gap A has a ring-shaped annular body as shown in more detail in FIG. 5, and the inner circumferential surface 25 is attached to the outer circumferential surface of the upper and lower movable tubes 7, In contrast, the outer circumferential surface 27 is in close contact with the upper end of the inner circumferential surface of the through hole 11 of the bushing 13 so as to be slidable. And the upper surface of the annular hydraulic groove 23 is processed in the circumferential direction to receive the pressure of the steam discharged through the nozzle 21, this hydraulic groove 23 is a cross section of a shape suitable for the operation of the steam pressure It has a shape, and more preferably has a tapered shape in which the side wall 29 of the outer circumferential surface 27 is tapered toward the upper end in order to be more elastic and effective close contact with the inner circumferential surface of the through-hole 11 of the bushing.

The steam discharge device 1 of the present invention configured as described above has the following operation.

When the solenoid valve 4 is excited, the up and down movable tube 7 rises by the magnetic force to overcome the elastic repulsive force of the spring 10. At this time, the pressure tight packing 21 has the side wall 29 penetrating the bushing 13. It moves in the sliding contact state with the inner surface of the hole 11. In addition, the central portion of the diaphragm 17 fitted to the upper and lower movable pipes 7 is raised along the movable pipes 7. As a result, the steam inlet 15 of the lower cap 9 that is blocked by the central projecting portion of the diaphragm 17 is opened.

When the inlet port 15 is opened, the high pressure steam inside the heating cooker enters the space 39 between the lower cap 9 and the diaphragm 17 through the inlet port, and then the steam inlet hole at the bottom of the upper and lower movable tubes 7. Inflow to the steam passage 35 of the up and down movable pipe 7 through 37 is discharged to the outside through the nozzle (19). The discharged steam is once prevented from soaring by colliding with the discharge port cap 28 and is distributed and discharged through the plurality of vapor discharge ports 41.

At this time, since the space under the discharge cap 28 is filled with high-pressure steam, the pressure-sensitive packing 21 is pressurized by the steam pressure. However, since the packing 21 is provided with a hydraulic groove 23 on the upper surface, mainly because the steam pressure acts on the hydraulic groove 23, the packing 21 is subjected to expansion force to the side, and thus, is relatively thicker than the inner circumferential surface 25. The outer circumferential surface 27 toward the side wall 29 which is thin and mobile is subjected to more deformation, so that the side wall 29 is in close contact with the inner circumferential surface of the bushing 13.

Therefore, since the clearance A between the bushing 13 and the up-and-down movable pipe 7 is made sure sealing by the pressure tight packing 21, the discharged high-pressure steam can infiltrate the inside of the solenoid valve 4 at all. There will be no. Then, after all the steam is discharged to the discharge hole 41 and the magnetic force by the coil 30 of the solenoid valve 4 is eliminated, the up and down movable tube 7 returns to its original position by the repulsive force of the spring 10 and the steam inlet 15 is closed again, and the pressure applied to the pressure-adhesive packing 21 is extinguished with the discharge of steam, so that the packing 21 has no friction with the inner circumferential surface of the side wall 29 of the bushing through-hole 11. According to the movement of the up and down movable tube 7 can be easily moved down.

As described above, according to the steam discharging device of the present invention, the pressure-adhesive packing attached to the upper end of the outer peripheral surface of the upper and lower movable tubes to prevent the gap between the upper and lower movable tubes and bushings of the steam discharging apparatus is located at the upper end of the upper and lower movable tubes As the pressure of the steam discharged from the nozzle expands to make contact with the inner circumferential surface of the through hole of the bushing more reliably, the ejected high-pressure steam cannot penetrate into the solenoid through the gap. This does not cause any change in corrosion or the like at all.

Therefore, the steam exhaust device of the present invention can exhibit normal performance without malfunction due to the damage of parts generated by long-term use, and furthermore, to prevent the damage that the user may suffer due to unexpected performance defects in advance. It ensures the safe use of the electric pressure cooker.

Although the present invention has been shown and described with respect to particular embodiments, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the accompanying Utility Model Claims. Anyone who owns it can easily find out.

Claims (3)

An outer case 3 forming an outer body, a cylindrical coil assembly 5 mounted inside the outer case 3, and a vertical movable tube 7 inserted in an axial direction along the hollow portion of the coil assembly 5. And a bushing 13 inserted into and fixed to the upper opening of the outer case 3, the bushing 13 having a through hole 11 formed on an axis thereof so that the upper and lower movable tubes 7 pass through the central portion thereof. In 1), the pressure-adhesive packing 21 is circumferentially attached to the upper circumferential surface of the upper and lower movable tubes 7 to seal the gap A between the upper and lower movable tubes 7 and the bushing 13. Steam discharge device for an electric pressure cooker, characterized in that. According to claim 1, wherein the pressure-adhesive packing 21 has an inner circumferential surface 25 is attached to the upper end of the outer circumferential surface of the vertical movable tube 7, the outer circumferential surface 27 is the upper end of the inner circumferential surface of the through hole 11 of the bushing (13) And an annular body in sliding contact with the annular body, and an annular hydraulic groove (23) is machined on the upper surface thereof. According to claim 1, wherein the pressure-adhesive packing 21 has a tapered shape that is tapered toward the upper side so that the side wall 29 forming the outer circumferential surface 27 can be elastically in close contact with the inner circumferential surface of the bushing. Steam discharge device.