KR102233563B1 - Multi-stage cooker with anti-seize pressure valve - Google Patents

Abstract

The present invention relates to a multi-stage cooker with an anti-sticking pressure valve, in which during opening/closing of an anti-sticking pressure valve, a valve body is rotatably opened and closed so as to prevent the same from sticking to a valve sheet, thereby preventing an operation failure of the pressure valve. That is, the present invention relates to a multi-stage cooker which comprises: a cooking tray provided for storing and cooking an object to be cooked in a cooker body; a steam discharge pipe provided on an upper portion of the cooker body and configured to form a pipe such that steam is discharged therethrough when the steam pressure of a cooking space is equal to or higher than a predetermined pressure; an anti-sticking pressure valve provided on the upper portion of the cooker body and configured to enable steam to be discharged to the outside via the steam discharge pipe when the steam pressure of the cooking space is equal to or higher than the predetermined pressure, wherein a valve body is provided to be rotatably opened and closed; and an operation control part provided on one side of the cooker body and configured to control an operation of a steam supply part according to an operation of a user. Therefore, according to the present invention, during opening/closing of the anti-sticking pressure valve, the valve body is rotatably opened and closed such that foreign substances between the valve sheet and the valve body are removed, and thus, it is possible to prevent an operation failure in which the pressure valve does not work due to the valve body that sticks to the valve sheet by the remaining object to be cooked.

Description

Multi-stage cooker with anti-seize pressure valve}

The present invention relates to a multi-stage cooker having an anti-seize pressure valve, and more particularly, in a multi-stage cooker, a cooking tray provided to cook a cooking object in a cooker body and a cooking space on the upper part of the cooker body. When the steam pressure of is higher than the set pressure, a steam discharge pipe is provided to form a discharge pipe, and when the steam pressure of the cooking space above the cooker body is higher than the set pressure, steam is provided to be discharged to the outside through the steam discharge pipe. It is provided with an anti-seize pressure valve provided to rotate the valve body to open and close, so that the valve body is rotated and opened and closed during the opening and closing process of the anti-seize pressure valve to prevent the valve body from sticking to the valve seat to prevent malfunction of the pressure valve It was for the purpose.

In general, a multi-stage cooker allows cooking objects to be stored in multiple stages using vapor pressure.

The multi-stage cooker as described above can supply steam to a cooker body provided to form a cooking space therein, a cooking door provided to open and close the front of the cooker body, and a cooking space of the cooker body. A steam supply unit provided in a manner, a washing nozzle provided to spray washing water to clean the cooking space above the cooking space of the cooker body, and condensed water or washing water in the cooking space below the cooking space of the cooker body. A drain pipe provided to form a pipe for draining, a drain valve provided to allow the drain pipe to be opened and closed by a user's operation to perform a drainage operation, and a cooking object to be put in the cooker body to be cooked. A cooking tray provided, a steam discharge pipe provided to form a pipe discharged when the steam pressure of the cooking space at the top of the cooker body is greater than or equal to the set pressure, and the steam pressure of the cooking space above the cooker body is greater than or equal to the set pressure In this case, it is composed of a pressure valve provided to allow steam to be discharged to the outside through a steam discharge pipe, and an operation control part provided on one side of the cooker body to control the operation of the steam supply part according to the user's manipulation.

In such a multi-stage cooker, cooking is performed by supplying steam from the steam supply unit to the cooking space according to the control of the operation control unit after putting the object to be cooked in the cooking tray and storing it in the cooking space.

When the steam pressure in the cooking space increases in the cooking process as described above, the pressure valve provided in the steam discharge pipe is opened to prevent excessive increase in the steam pressure in the cooking space, and cooking is performed.

However, in the conventional multi-stage cooker as described above, a part of the cooking object discharged together with the steam during the cooking process is caught in the valve body and the valve seat of the pressure valve. Since it has this viscosity, there is a problem that the valve body sticks to the valve seat, causing malfunction.

Korean Patent No. 10-2053571

Accordingly, in the present invention, a part of the cooking object discharged together with steam during the cooking process of the conventional multi-stage cooker as described above is caught between the valve body and the valve seat of the pressure valve. Since its composition is viscous, it is intended to solve the problem of causing malfunction by causing the valve body to stick to the valve seat.

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That is, the present invention relates to a multi-stage cooker, a cooker body provided to form a cooking space therein, a cooking door provided to open and close the front of the cooker body, and a cooking space of the cooker body. A steam supply unit provided to supply steam, a washing nozzle provided to spray washing water to clean the cooking space above the cooking space of the cooker body, and the inside of the cooking space under the cooking space of the cooker body. A drain pipe provided to form a pipe to drain condensed water or washing water, a drain valve provided to allow the drain pipe to be opened and closed by a user's operation to perform a drainage operation, and cook the cooking object in the cooker body A steam discharge pipe provided to form a discharge pipe when the steam pressure of the cooking space at the top of the cooker body is higher than the set pressure, and the steam pressure of the cooking space above the cooker body When the pressure is higher than the set pressure, the steam supply is provided to allow steam to be discharged to the outside through the steam discharge pipe, but the anti-seize pressure valve is provided to rotate and open and close the valve body, and the operation of the steam supply unit on one side of the cooker body can be controlled. It is characterized in that it is configured with an operation control unit that is provided.

Accordingly, the present invention provides a steam discharge pipe provided to form a discharge pipe when the steam pressure of the cooking space at the top of the cooker body is greater than or equal to the set pressure, and when the steam pressure of the cooking space on the upper part of the cooker body is greater than or equal to the set pressure. By providing an anti-seize pressure valve provided so that the steam can be discharged to the outside through the steam discharge pipe, but the valve body is rotated and opened and closed, the valve body is rotated and opened and closed in the opening and closing process of the anti-seize pressure valve, so that the valve body is rotated between the valve seat and the valve body This has the effect of preventing a malfunction in which the pressure valve is not operated due to the valve body being stretched by the residue to be cooked due to the removal of foreign substances.

1 is a perspective view showing an embodiment of the present invention.
2 to 4 are exemplary views inside the cooking chamber according to the present invention.
5 and 6 are exemplary views showing the appearance of the washing nozzle according to the present invention.
Figure 7 is an exemplary view showing the appearance of the steam pressure valve and silencer according to the present invention.
Figure 8 is an exemplary view showing a state of the silencer according to the present invention.
9 to 11 are exemplary views showing the appearance of the steam pressure valve according to the present invention.
12 is an exemplary view showing the configuration of a valve seat according to the present invention
13 is an exemplary view showing an embodiment of a valve seat having a discharge induction spiral groove according to the present invention.
14 is an exemplary view showing the configuration of a valve body according to the present invention.
15 is an exemplary view showing a state of a steam pressure valve having a valve cleaning nozzle according to the present invention.

Hereinafter, it will be described in detail with reference to the accompanying drawings.

In the present invention, in the opening and closing process of the pressure valve, foreign matter is removed between the valve bodies, so that the valve body and the valve seat are stretched to prevent malfunction in which the pressure valve is not operated. Terms or words should not be construed as being limited to a conventional or dictionary meaning, and the inventor of the present invention is based on the principle that the concept of terms can be appropriately defined in order to explain his or her invention in the best way. It must be interpreted as a meaning and concept consistent with the technical idea.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so that they can be replaced at the time of application. It should be understood that there may be various equivalents and variations.

That is, the present invention is a multi-stage cooker, the cooker body 110 and the cooker door 120, the steam supply unit 200, the washing nozzle 310, the drain pipe 320, the drain valve 330, the cooking tray It is composed of (400), a steam discharge pipe (510), an anti-seize pressure valve (520) and an operation control unit (600).

Here, the cooker body 110 is provided to form a cooking space therein.

Tray rails 111 are provided on the inner walls of both sides of the cooking space of the cooker body 110 at equal intervals to accommodate a plurality of cooking trays 400.

In addition, the cooking door 120 is provided to open and close the front of the cooking machine body 110.

The cooking door 120 is provided with a hinge portion hinged to the cooking machine body 110 on one side and a locking device on the other side.

In addition, the steam supply unit 200 is provided to supply steam to the cooking space of the cooker body 110.

The steam supply unit 200 may be configured and implemented as a steam boiler heated by a gas burner under the cooker body 110 to generate steam.

The steam supply unit 200 may be configured and implemented as a steam boiler that generates steam to the cooker body 110 and supplies it according to the control of the operation control unit.

In addition, the washing nozzle 310 is provided to spray washing water on the upper portion of the cooking space of the cooker body 110 to clean the cooking space.

The washing nozzle 310 sprays washing the cooking space of the cooker body 110 with washing water according to the control of the operation control unit during the washing process according to the user's operation after the operation of the cooking object.

In addition, the drain pipe 320 is provided to form a pipe under the cooking space of the cooker body 110 so as to drain the condensed water or washing water inside the cooking space.

In addition, the drain valve 330 is provided in the drain pipe path 320 to be opened and closed by a user's operation so that a drainage operation can be performed.

The drain pipe 320 and the drain valve 330 discharge the washing water remaining on the bottom of the cooking space after washing the cooking space according to a user's manipulation.

In addition, the cooking tray 400 is provided so that the cooking object is put in the cooker body 110 to be cooked.

In addition, the steam discharge pipe 510 is provided on the upper portion of the cooker body 110 to form a pipe discharged when the steam pressure of the cooking space is equal to or higher than the set pressure.

In addition, the anti-seize pressure valve 520 is provided on the top of the cooker body 110 to allow steam to be discharged to the outside through the steam discharge pipe 510 when the steam pressure of the cooking space is higher than the set pressure. 523) is provided to open and close rotation.

The anti-seize pressure valve 520 forms a steam inlet 521a connected to the steam outlet pipe 510 at the bottom and forms a steam outlet 521b through which steam is discharged to one side, and the steam inlet 521a and the steam outlet A valve body 521 formed with a valve chamber 521c between (521b) and a valve seat 522 formed in a plane shape on the bottom of the upper valve chamber 521c at the steam inlet 521a side of the valve body 521 , A valve body 523 that is seated on the valve seat 522 to suppress the discharge of steam and is provided to be opened and closed during the opening and closing process, and a valve spring 524 provided to support the upper portion of the valve body 523 , The pressure regulator 525 and the valve body 521 are coupled at the upper part of the valve body 521 to pressurize the upper part of the valve spring 524 so that the opening and closing pressure of the valve body 523 can be adjusted. It is composed of a regulator cap 526 provided to protect the pressure regulator 525 from being exposed at the top.

The valve seat 522 is formed to protrude into the valve chamber (521c), and the cooking object introduced into the inner surface flows down without being accumulated on the seat surface (522a) and is formed to be inclined to guide the opening and closing of the valve body 523. A foreign material drop-inducing slope (522b) is formed, and the valve seat (522) is a foreign material release slope that forms an inclined surface such that foreign matter accumulated on the seat surface (522a) on the outer surface is discharged to the outside by the opening and closing rotation of the valve body (523). (522c) was formed.

The seat surface 522a of the valve seat 522 allows foreign substances introduced in the process of opening rotation of the valve body 523 to be guided inward, and foreign substances accumulated on the seat surface 522a by the closed rotation of the valve body 523 The discharge induction spiral groove (522d) is formed to be guided to the outside, but the discharge induction spiral groove (522d) is formed to be cut off at the center of the sheet surface (522a) so that the airtightness of the sheet surface (522a) is maintained. It can be.

The valve body 523 is inserted into the steam inlet 521a at the bottom to form two to four opening/closing guide protrusions 523c to guide opening and closing, and the opening/closing guide protrusion 523c is at least one side of both sides. In the process of opening and closing the valve body 523, the rotation guide slope 523d may be formed to induce rotational opening and closing of the valve body 523 by interference with the inner wall of the steam inlet 521a.

This can be carried out by forming a vapor discharge induction slope 523b at the lower edge of the valve plate 523a of the valve body 523 so that the discharged steam is not caught and discharged so that foreign matters are not caught and accumulated.

The valve spring is a rod-shaped spring shaft core supported by a rotation point in a center hole of the valve plate, which is a center pin on the upper surface of the valve body, an elastic spring provided in a form surrounding the spring shaft core, and an elastic spring caught in the upper and lower sides of the elastic spring. It can be carried out by being provided with a supporting upper and lower spring-engaged washers.

The steam inlet 521a may be configured to be detachable from the valve chamber 521c by helical coupling.

In addition, the operation control unit is provided on one side of the cooker body 110 to control the operation of the steam supply unit 200 according to the user's operation.

On the other hand, in another embodiment of the present invention, the steam discharge pipe 510 and the anti-seize pressure valve 520 generated in the steam discharge process through the steam discharge pipe 510 on the upper part of the internal cooking space of the cooker body 110 This can be carried out by providing a condensed water tray 531 to accommodate the falling objects so that the falling objects do not fall into the cooking tray 400.

The condensed water tray 531 is provided to be mounted on a tray holder 532 provided in an upper portion of the cooking space of the cooker body 110.

Since the condensate water tray 531 is mounted by the tray holder 532, the condensate water tray 531 is installed in an inclined manner so that foreign matter does not flow into the cooking tray 400 and can be drained to one side of the cooking space.

In addition, in the implementation of the present invention, the pressure pipe washing unit 540 provided to spray the washing water so as to clean the inside of the steam discharge pipe 510 and the anti-seize pressure valve 520 on the upper portion of the condensate water tray 531. ), which can be carried out.

The pressure pipe washing tool 540 is provided to spray the washing water into the inside of the steam discharge pipe 510 under the control of the operation control unit.

The pressure pipe washing port 540 is a washing port pipe 541 through which washing water is supplied to wash the steam discharge pipe 510 provided in two or more of the cooker body 110 and a steam discharge pipe to the washing port pipe 541 The washing water spray hole 542 perforated in the direction of 510 is formed and carried out.

The pressure tube washing tool 540 may be configured to be connected to the washing nozzle 310.

In addition, in the implementation of the present invention, it can be carried out by attaching a silencer 710 capable of attenuating the noise during the steam discharge process to the anti-seize pressure valve 520.

The silencer 710 is formed of multiple diaphragms and pipes, like a typical silencer 710.

The silencer 710 may be implemented by forming a condensation drainage hole 711 at the lowest position to discharge condensation water generated from the inside during the steam discharge process.

In addition, in the implementation of the present invention, a valve body 523 is provided in the anti-seize pressure valve 520, and a valve washing nozzle 810 is provided in the upper side valve body 521, and the washing water on the side of the valve body 523 is drained. This can be carried out by forming a valve drain port 820 on the valve body 521 on the valve body 523 side so that it can be done.

The valve drain port 820 is connected by a pipe body and connected to the lower side through the upper portion of the cooker body 110 to be discharged to the bottom or the drain pipe path 320 to be provided with a valve drain pipe 830.

Hereinafter, a description will be given of the effects of the application of the present invention.

As described above, the cooker body 110 provided to form a cooking space therein, the cooking door 120 provided to open and close the front of the cooker body 110, the cooker body ( A steam supply unit 200 provided to supply steam to the cooking space of 110, a washing nozzle 310 provided to spray washing water to clean the cooking space above the cooking space of the cooker body 110 ), a drain pipe line 320 provided to form a pipe under the cooking space of the cooker body 110 to drain the condensed water or washing water inside the cooking space, and the user's manipulation of the drain pipe line 320 A drain valve 330 provided to be opened and closed to perform a drainage operation, a cooking tray 400 provided to store and cook an object to be cooked in the cooker body 110, and the upper portion of the cooker body 110 In the case where the steam pressure of the cooking space is greater than or equal to the set pressure, the steam discharge pipe 510 is provided to form a discharge pipe, and when the steam pressure of the cooking space above the cooker body 110 is greater than the set pressure, the steam discharge pipe 510 ) Through which steam is discharged to the outside, the anti-seize pressure valve 520 provided so that the valve body 523 is rotated and opened and closed, and a steam supply unit on one side of the cooker body 110 according to the user's operation ( When the present invention is implemented by applying the present invention consisting of an operation control unit provided to control the operation of 200), the valve body 523 is rotated and opened and closed in the opening and closing process of the anti-seize pressure valve 520, so that the valve seat 522 The foreign matter is removed between the and the valve body 523.

As described above, in the opening and closing process of the valve body 523, when the cooking target residue between the valve body 523 and the valve seat 522 is removed, the valve body 523 sticks to the valve seat 522 and causes pressure. This is to prevent malfunction when the valve is not operated.

On the other hand, in the practice of the present invention, the valve seat 522 is formed to protrude into the valve chamber 521c, and when a foreign object drop inducing slope surface 522b is formed on the inner surface, the foreign substance fall inducing slope surface 522b The cooking object introduced into the valve seat 522 by this does not accumulate on the seat surface 522a and flows down along the foreign material drop-inducing slope surface 522b, and the opening and closing of the valve body 523 is performed by the foreign substance drop-inducing slope surface 522b. ), the guide is opened and closed smoothly.

In addition, when performing by forming a foreign matter release slope 522c on the outer surface of the valve seat 522, the foreign matter accumulated on the seat surface 522a by the foreign matter release slope 522c is opened and closed of the valve body 523. It is discharged to the outside by the foreign material is discharged smoothly along the slope (522c).

In addition, when the discharge guide spiral groove 522d is formed on the sheet surface 522a, but the discharge guide spiral groove 522d is cut off at the center of the sheet surface 522a, the airtightness of the sheet surface 522a As the force is maintained, foreign matters are minimized to accumulate on the seat surface 522a so that foreign matters introduced into the process of opening rotation of the valve body 523 are guided to the inside by the guide spiral groove, and due to the closed rotation of the valve body 523 The foreign matter accumulated on the sheet surface 522a is guided and discharged to the outside along the guide spiral groove.

In addition, two to four opening and closing guide protrusions 523c are formed on the valve body 523, and the opening and closing guide protrusion 523c is formed by forming a rotation guide slope surface 523d on one or more of both sides. Then, in the opening and closing process of the valve body 523, the opening/closing guide protrusion 523c guides the opening/closing, and the rotation guide inclined surface 523d formed on at least one side of the opening/closing guide protrusion 523c is formed in the steam inlet 521a By inducing the rotational opening and closing of the valve body 523 by interference with the inner wall of the valve seat 522 to minimize the accumulation of foreign matter.

In addition, in the practice of the present invention, when the steam discharge induction slope surface 523b is formed on the lower edge of the valve plate 523a of the valve body 523, The steam is discharged without being caught, so that foreign matters are not caught in the valve body 523 and accumulated on the valve plate.

In addition, in the implementation of the present invention, if the condensate water tray 531 is provided at the lower part of the steam discharge pipe 510, the condensed drops generated in the steam discharge pipe 510 during the cooking process by the condensate water tray 531 are collected. Contamination of the cooking object contained in the cooking tray 400 due to condensed water discharged and containing the cooking object is prevented.

In addition, in the practice of the present invention, a pressure pipe washing tool 540 provided to spray washing water so as to clean the inside of the steam discharge pipe 510 and the anti-seize pressure valve 520 on the upper part of the condensate water tray 531. ), the washing water is sprayed into the steam discharge pipe 510 through the pressure pipe washing port 540 during the washing process of the cooking space, so that foreign matter inside the steam discharge pipe 510 is cleanly removed. Foreign body fall is minimized.

In particular, the washing water sprayed through the pressure washer is sprayed to the lower portion of the valve body 523 of the anti-seize pressure valve 520 and around the valve seat 522 to cleanly remove foreign matter, which is the residue of the cooking object, and the valve due to the foreign matter. This is to prevent malfunction due to the sticking of the sieve 523.

In addition, in the implementation of the present invention, when a silencer 710 is attached to the anti-seize pressure valve 520, the noise of the steam discharge process is attenuated from the anti-seize pressure valve 520 so that the surrounding cooker This is to prevent surprises due to the exhaust noise of the steam.

In addition, when a condensation drainage hole 711 is formed in the silencer 710, the condensation water generated inside the silencer 710 is smoothly discharged during the steam discharge process, so that internal contamination due to the remaining condensation water can be prevented. There is.

In addition, in the practice of the present invention, a valve body 523 is provided on the valve body 521 on the upper side of the valve body 521 on the anti-seize pressure valve 520, and the washing water on the side of the valve body 523 is When the valve drain port 820 is formed in the valve body 521 on the valve body 523 so that drainage is possible, the valve chamber 521c of the anti-seize pressure valve 520 is sprayed by the valve cleaning nozzle 810. This is to prevent a malfunction in which the anti-seize pressure valve 520 is not operated because the residue to be cooked sticks between the valve seat 522 and the valve body 523 by being cleaned by the washing water.

110: cooker body 111: tray rail
120: cooking door
200: steam supply unit
310: washing nozzle
320: drain pipe
330: drain valve
400: cooking tray
510: steam discharge pipe
520: anti-seize pressure valve
521: valve body
521a: steam inlet 521b: steam outlet 521c: valve chamber
522: valve seat
522a: seat surface 522b: foreign object fall-inducing slope
522c: foreign matter release slope 522d: discharge guide spiral groove
523: valve body
523a: valve plate 523b: steam discharge guide slope
523c: opening/closing guide 4 protrusion 523d: rotation guided slope
524: valve spring
525: pressure regulator
526: Adjuster cap
531: condensate water tray 532: tray holder
540: pressure pipe washing port
541: washing port pipe 542: washing water spray hole
600: operation control unit (600)
710: silencer 711: condensation drainage
810: valve cleaning nozzle
820: valve drain
830: valve drain pipe

Claims (6)

In a multi-stage cooker;
It is possible to form a cooking tray 400 provided in the cooker body 110 so as to contain and cook an object to be cooked, and a pipeline discharged when the vapor pressure of the cooking space above the cooker body 110 is greater than or equal to a set pressure. When the steam pressure of the cooking space is greater than or equal to the set pressure above the steam discharge pipe 510 and the cooker body 110 provided so that steam is discharged to the outside through the steam discharge pipe 510, the valve body 523 Consists of an anti-seize pressure valve 520 provided to rotate open and close, and an operation control unit 600 provided to control the operation of the steam supply unit 200 according to the user's operation on one side of the cooker body 110 and;
The anti-seize pressure valve 520 forms a steam inlet 521a connected to the steam outlet pipe 510 at the bottom and forms a steam outlet 521b through which steam is discharged to one side, and the steam inlet 521a and the steam outlet A valve body 521 formed with a valve chamber 521c between (521b) and a valve seat 522 formed in a plane shape on the bottom of the upper valve chamber 521c at the steam inlet 521a side of the valve body 521 , A valve body 523 that is seated on the valve seat 522 to suppress the discharge of steam and is provided to be opened and closed during the opening and closing process, and a valve spring 524 provided to support the upper portion of the valve body 523 , The pressure regulator 525 and the valve body 521 are coupled at the upper part of the valve body 521 to pressurize the upper part of the valve spring 524 so that the opening and closing pressure of the valve body 523 can be adjusted. Consisting of a regulator cap 526 provided to protect the pressure regulator 525 from being exposed at the top;
The valve seat 522 is formed to protrude into the valve chamber (521c), and the cooking object introduced into the inner surface flows down without being accumulated on the seat surface (522a) and is formed to be inclined to guide the opening and closing of the valve body 523. A foreign material fall-inducing slope (522b) is formed, and the valve seat (522) is a foreign material release slope that forms an inclined surface such that foreign matter accumulated on the seat surface (522a) on the outer surface is discharged to the outside by the opening and closing rotation of the valve body (523). (522c), a multi-stage cooker having an anti-seize pressure valve, characterized in that.
The method of claim 1;
The seat surface 522a of the valve seat 522 allows foreign substances introduced in the process of opening rotation of the valve body 523 to be guided inward, and foreign substances accumulated on the seat surface 522a by the closed rotation of the valve body 523 The discharge induction spiral groove (522d) is formed to be guided to the outside, but the discharge induction spiral groove (522d) is formed to be cut off at the center of the sheet surface (522a) so that the airtightness of the sheet surface (522a) is maintained. Multi-stage cooker with anti-seize pressure valve.
The method of claim 1;
The valve body 523 is inserted into the steam inlet 521a at the bottom to form two to four opening/closing guide protrusions 523c to guide opening and closing, and the opening/closing guide protrusion 523c is at least one side of both sides. In the process of opening and closing the valve body 523, a rotation guide slope surface 523d is formed to induce rotational opening and closing of the valve body 523 by interference with the inner wall of the steam inlet 521a. Multi-stage cooker with pressure valve.
The method of claim 1;
The valve plate 523a of the valve body 523 has an anti-seize pressure valve, characterized in that the vapor discharged inclined surface 523b is formed so that the discharged steam is not caught and discharged so that foreign matters are not caught and accumulated. Multi-stage cooker.
The method of claim 1;
Falling objects of the steam discharge pipe 510 and the anti-seize pressure valve 520 generated during the steam discharge process through the steam discharge pipe 510 on the upper part of the internal cooking space of the cooker body 110 fall into the cooking tray 400 A multi-stage cooker having a condensation-preventing pressure valve, characterized in that it has a condensate tray (531) to accommodate falling objects so that it is not.
The method of claim 5;
Fixing, characterized in that it is provided with a pressure pipe washing unit 540 provided to spray the washing water so as to clean the inside of the steam discharge pipe 510 and the anti-seize pressure valve 520 on the upper part of the condensate water tray 531 Multi-stage cooker with preventive pressure valve.

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