JP2018175135A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker which can safely release pressure.SOLUTION: The present invention includes: a body; an inner pot stored in the body; a cover covering an upper part of the body; an inner cover having a seam member and provided to the cover so as to cover the inner pot in a sealed manner by bringing the seal member into contact with a whole periphery of an upper end opening of the inner pot; a lock means for maintaining the sealed state between the inner pot and the inner cover even when a predefined pressure higher than atmospheric pressure is applied to an inner space sealed in the inner pot and the inner cover; a pressure reduction means for returning the predefined pressure applied to the inner space sealed in the inner pot and the inner cover back to the atmospheric pressure; and a heating means provided in the body for heating the inner pot. The pressure reduction means reduces the pressure by opening a steam valve to evacuate the steam in which the steam valve is operated so as to be opened by a drive force of an electric motor controlled by a control means and closed by an energizing means.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a cooker for cooking at a pressure higher than atmospheric pressure.

  Conventionally, there is known a cooker which cooks by applying a pressure higher than atmospheric pressure in the pan using steam generated by heating the food contained in the pan in the cooker. If the food is rice, it can be cooked deliciously plumply, and if the food is meat, it can be boiled softly in a short time.

  Such a cooker is dangerous because high temperature water vapor is dissipated when the lid is opened under high pressure in the pan. Therefore, when opening the lid, it is necessary to remove steam forcibly by pressure regulating valve, steam release valve, etc. to return the internal pressure to the same pressure as the atmospheric pressure and then open it. Since a high temperature steam is jetted out at once and there is a danger of burns and the like, a cooker configured to prevent the steam at a high temperature from jetting out from the steam outlet at once has been proposed (see, for example, Patent Documents 1 and 2).

JP-A-2000-70134 (page 3, FIG. 1) JP 2001-137113 A (page 4, FIG. 4)

  In the conventional cooker described in Patent Document 1, the opening area of the steam relief hole of the pressure relief valve is smaller than the steam relief hole of the lid, and steam is jetted out from the steam relief port of the lid at a stretch. It is suppressing.

However, since the opening area of the steam relief hole of the pressure relief valve is reduced, it takes time to return to the same pressure as the atmospheric pressure.

Moreover, in the conventional cooker described in Patent Document 2, the pressure regulating valve body for adjusting the pressure is controlled to be intermittently opened by a solenoid, and steam is spouted out at once from the exhaust port of the lid. It is suppressing.

However, there is a problem that the control becomes complicated because the pressure regulating valve body for adjusting the pressure is controlled to be opened intermittently by the solenoid.

  The present invention was made in order to solve the above-mentioned subject, and it aims at providing a cooking appliance which can release pressure safely.

  The cooker according to the present invention comprises: a main body having an opening at the top, a cylindrical inner pot having a bottom and an opening at the upper end, which is accommodated in the main body so as to be able to be taken in and out from the main body opening; A cover which covers the upper part of the main body and which has a seal member, the seal member being in contact with the entire circumference of the upper end opening of the inner pot to sealably cover the inner pot The inner lid and the lock means for holding the sealed state of the inner lid and the inner lid even if a predetermined pressure higher than atmospheric pressure is applied to the inner space sealed by the inner lid and the inner lid, and the inner pot and the inner lid The pressure reducing means for returning the pressure from the predetermined pressure applied to the sealed internal space to the same pressure as the atmospheric pressure, and the heating means provided in the main body for heating the inner pot, the pressure reducing means opens the steam valve Discharge the steam and lower the pressure, and the steam valve is driven by a motor controlled by the control means. And an operation to open by the force, is to the operation of closing by the urging means.

  According to the present invention, the pressure reducing means opens the steam valve to discharge the steam and lowers the pressure, and the steam valve operates to open by the driving force of the motor controlled by the control means. It can be released gradually and the pressure in the inner pot can be safely returned to the atmospheric pressure.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole perspective view of the cooking device which concerns on Embodiment 1 of this invention. It is a whole perspective view in the state where the lid of the cooking device concerning embodiment of the invention 1 was opened. It is sectional drawing which cut | disconnected the cooker which concerns on Embodiment 1 of this invention in the front-back direction with cut-off line AA shown in FIG. It is sectional drawing which cut | disconnected the cooker which concerns on Embodiment 1 of this invention in the left-right direction with cutting-plane line B-B shown in FIG. It is a perspective view of the inner pot accommodated in the cooking device according to Embodiment 1 of the present invention. It is the figure which looked at the lid of the cooking device concerning Embodiment 1 of the present invention from the field side which counters the upper end opening side of an inner pot. It is a perspective view of the state which removed the shell part from the cover body of the cooking device which concerns on Embodiment 1 of this invention. (A) Principal part sectional view when inner pot internal pressure detection means of the cooker according to Embodiment 1 of the present invention is lower than atmospheric pressure, (b) according to Embodiment 1 of the present invention Principal part sectional view when the inner pot internal pressure detection means of a cooking appliance is in the same state as atmospheric pressure, (c) The internal pan internal pressure detection means of the cooking appliance according to the first embodiment of the present invention is atmospheric pressure It is principal part sectional drawing in the state which is applying the higher predetermined pressure. (A) A perspective view of the lid of the cooker according to Embodiment 1 of the present invention from which the shell part has been removed, as viewed from a direction different from that in FIG. 7, (b) Cutting line shown in FIG. It is the sectional view cut in the direction of order with CC, (c) It is an enlarged drawing of the G section shown in Drawing 9 (b). (A) A diagram showing the steam valve fully opened by the steam valve opening / closing means of the pressure reducing means of the cooker according to Embodiment 1 of the present invention, (b) the fully opened state of the cooker according to Embodiment 1 of the present invention It is the principal part enlarged view of the steam valve circumference of. (A) A diagram showing a fully closed state of the steam valve by the steam valve opening / closing means of the pressure reducing means of the cooker according to the first embodiment of the present invention, (b) all of the cooker according to the first embodiment of the present invention It is a principal part enlarged view of the steam valve vicinity of a closed state. It is a perspective view which shows the structure of the steam valve opening-and-closing means of the pressure reduction means of the cooking appliance which concerns on Embodiment 1 of this invention. (A) State diagram showing the steam valve opening / closing means when the steam valve of the cooker according to the first embodiment of the present invention is fully closed, (b) The steam valve of the cooker according to the first embodiment of the present invention It is a state diagram which shows the steam valve opening-and-closing means in the middle of being closed, (c) It is a state diagram showing the steam valve opening-and-closing means when the steam valve of the cooking appliance concerning Embodiment 1 of this invention is full open. (A) A main part enlarged view showing a wide opening of the flow control valve provided on the upstream side of the flow of steam of the steam valve of the cooker according to Embodiment 2 of the present invention, (b) It is the principal part enlarged view showing the state where the opening of the flow control valve provided in the upper stream side of the flow of the steam of the steam valve of a cooking appliance concerning Embodiment 2 was narrow.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference numerals, and the description thereof will be appropriately omitted or simplified. Further, the configuration, size, arrangement and the like of the configuration described in each drawing can be appropriately changed within the scope of the present invention.

Embodiment 1
[Schematic configuration of the entire cooker]
FIG. 1 is an overall perspective view of a cooker according to Embodiment 1 of the present invention, FIG. 2 is an overall perspective view of a cooker according to Embodiment 1 of the present invention with a lid opened, and FIG. 1. Sectional drawing which cut | disconnected the cooking device which concerns on Embodiment 1 of invention in the front-back direction with cut-off line AA shown in FIG. 1, FIG. 4 is a cutting line which shows the cooker which concerns on Embodiment 1 of this invention in FIG. FIG. 5 is a cross-sectional view cut in the left-right direction along B-B, FIG. 5 is a perspective view of an inner pot accommodated in the cooker according to Embodiment 1 of the present invention, FIG. 6 is a cooker according to Embodiment 1 of the present invention FIG. 7 is a perspective view of the lid of the cooker according to the first embodiment of the present invention from which the shell is removed, as viewed from the side opposite to the upper opening side of the inner pot. .

  As shown in FIG. 1 to FIG. 4, the cooker 100 according to Embodiment 1 of the present invention is a cooker that cooks the food to be cooked at a pressure higher than the atmospheric pressure, and includes the main body 1 and the lid 2 It is configured. The upper surface of the main body 1 is open, and the inner pan accommodating portion 1a (see FIG. 3) is provided inside the open portion.

  The bottomed cylindrical inner pot 3 whose upper surface shown in FIG. 5 is open is accommodated in the inner pot housing portion 1a so as to be able to be put in and out. The inner pot 3 is a cooking vessel for containing the food to be cooked, and in the case where the heating means is of the induction heating type, in consideration of the fact that it is electrically conductive and has a high withstand voltage, generally a metal material such as aluminum or the like A clad material is formed by laminating and bonding a plurality of materials such as copper. However, it is not limited to metal, and may be formed of a carbon material having conductivity if it is high withstand voltage, a clay pot having a conductive material in part, or the like.

[Inner pot]
As shown in FIG. 5, the upper surface of the inner pot 3 is open, and the inner pot 3 has a tubular shape having a bottom 3d and a body 3c. A flange portion 3b extending outward from the inner side of the inner pot is provided on the entire upper end of the opening. The flange portion 3 b is provided with a plurality of flange projecting portions 3 b 1 which extend outward from the end of the flange portion 3 b at equal intervals.

  A handle 3a is provided near the upper surface opening on the outer side of the body 3d. The handle 3a is held when the inner pot 3 is put in and out of the main body 1, and is made of resin. The handle 3a also functions as positioning so that the inner pot 3 does not rotate when the inner pot 3 is housed in the inner pot housing portion 1a. The necessity for preventing the inner pot 3 from rotating will be described later.

[Body]
Inside the main body 1, heating means 11 and 12 for heating the inner pot 3 and further heating the food contained in the inner pot 3 are provided outside the inner pot storage portion 1a. The heating means 11 is, for example, an electromagnetic induction type heating source, and is constituted by annular induction heating coils 11a, 11b and 11c (hereinafter collectively described as the heating means 11). As shown in FIG. 3, the induction heating coil 11 is provided at a position corresponding to the bottom 3 d of the inner pot 3.

  The heating means 12 is constituted of, for example, a radiant heating source. The heating means 12 is provided in the position corresponding to the trunk | drum 3c (refer FIG. 5) of the inner pot 3, as shown in FIG. In the first embodiment of the present invention, the heating means 11 is an electromagnetic induction heating source, and the heating means 12 is a radiation heating source. However, the present invention is not limited to this, and vice versa. Alternatively, both of the heating means 11 and the heating means 12 may be electromagnetic induction heat sources or radiation heat sources.

  Further, a substrate 23 for driving the heating means 11 and the heating means 12 is provided inside the main body 1.

  Commercial power is supplied to the substrate 23 by a power cord (not shown). Furthermore, inside the main body 1 is provided a blower 24 for cooling the substrate 23 and the heater 11.

  Then, inside the main body 1, an operation display substrate 25 on which operation means 25a and display means 25b are mounted is provided. The operation means 25a is a mechanical switch, and is inputted by pressing the operation button 1f provided on the outer side of the main body shown in FIG. 2, and the control means (not shown) makes a menu of cooking, cooking conditions, cooking time by this input signal. Etc. are set. In the first embodiment of the present invention, the operating means 25a is a mechanical switch. However, the present invention is not limited to this. The operating means 25a may be a touch switch type that detects an input by a change in electrostatic capacitance.

  The display means 25b is a liquid crystal display device, and displays the cooking menu, cooking conditions, cooking time and the like set by the operation means 25a as characters, numbers, figures and the like. The display content of the display means 25b can be visually recognized from the outside by a window-like display part 1e which is provided on the outer side of the main body shown in FIG. 2 and can transmit visible light. Although in the first embodiment of the present invention the display means 25b is a liquid crystal display device, the present invention is not limited to this, and a seven-segment LED or the like may be used.

  Although the operation display substrate 25 is provided on the main body 1 in the first embodiment of the present invention, the present invention is not limited to this, and the operation display substrate 25 may be provided on the lid 2.

  Inside the main body 1, the bottom surface of the inner pot housing portion 1a is provided with a temperature detection means 8 for contacting the outside of the bottom 3d of the inner pot 3 and directly detecting the temperature outside the bottom 3d of the inner pot 3 ing. The temperature detection signal of the temperature detection means 8 is transmitted to the control means (not shown), and the control means controls the heating power of the heating means 11 and 12 or displays the cooking state on the display means 25b according to the measured temperature.

[Lid]
The lid 2 is rotatably attached to a hinge portion 1b provided on the upper surface of the main body. The hinge part 1b is provided with the rotational axis 21 and the hinge spring 22, as shown in FIG. The lid 2 pivots about the axis of the pivot shaft 21.

  The hinge spring 22 biases the lid 2 in the opening direction. When the lid 2 biased in the opening direction by the hinge spring 22 is manually rotated against the biasing force of the hinge spring 22, the engagement provided at the end opposite to the side attached to the hinge portion 1b The stopper 2 a is locked by engaging the latch 1 d provided on the upper surface of the main body 1, and the lid 2 closes the upper surface opening of the main body 1.

  The lid 2 in the state of closing the upper surface opening of the main body 1 moves the latch 1 d away from the locking portion 2 a when the lid open button 1 c provided on the outer side of the main body shown in FIGS. The stopped state is released, and the biasing force of the hinge spring 22 pivots in the opening direction about the axial center of the pivot shaft 21. However, since the hinge spring 22 does not have an urging force enough to pivot the lid 2 to the fully open position, pivoting to the fully open position is manually performed.

If the biasing force of the hinge spring 22 is made strong enough to turn the lid 2 to the fully open position, the lid 2 is vigorously released at the moment when the locked state is released. Resistance to closing is not good, usability is poor, and food to be stored in the inner pot 3 is spilled by reaction when the lid 2 is vigorously moved to the fully open position, which is not good for safety and usability It will affect. Therefore, the hinge spring 22 does not have an urging force enough to turn the lid 2 to the fully open position.

  An inner lid 4 is provided on the side of the lid 2 facing the upper surface of the main body 1. The inner lid 4 is for closing the opening of the inner pot 3. The inner lid 4 is attached to the lid 2 by inner lid fixing means 4a shown in FIGS. The inner lid fixing means 4a is fixed, for example, by a screw.

  The inner lid 4 is provided with a seal member 5 on the outer periphery in order to close and close the opening of the inner pot 3. The seal member 5 is formed of silicone rubber in terms of flexibility, heat resistance, food safety, and the like. The seal member 5 is provided so as to be in contact with the flange portion 3 b provided around the entire upper end of the opening of the inner pot 3 along the entire periphery.

When the locking portion 2a of the lid 2 is engaged with the latch 1d on the upper surface of the main body 1 and the lid 2 closes the upper surface opening of the main body 1, the sealing member 5 is attached to the flange portion 3b of the inner pot 3 Contact to be pressed.

  The cooker 100 according to the first embodiment of the present invention is a cooker that cooks the food to be cooked at a pressure higher than the atmospheric pressure as described above, and the inside of the inner pot 3 closed by the inner lid 4 is It is a space for cooking, that is, a pressure space P (see FIGS. 3 and 4).

  Since pressure of 2.1 to 2.2 atmospheric pressure is applied to the pressurizing space P during cooking, only the locking portion 2a of the lid 2 is locked by the latch 1d on the upper surface of the main body 1 In this case, the cover 2 can not be resisted against the pressure of 2.1 to 2.2 atm applied to the pressure space P, and the lid 2 is opened. Therefore, in order to secure the pressurized space P even when pressure is applied during cooking, the closed state of the upper surface opening of the inner pot 3 by the inner lid 4 is mechanically held.

In addition, 2.1-2.2 atmospheres pressure here is the pressure in the absolute pressure which measured the vacuum state on the basis of the pressure 0. FIG. The gauge pressure measured using the atmospheric pressure as a standard of pressure 0 is 1.1 to 1.2 atm. All subsequent statements regarding pressure are statements of pressure in absolute pressure.

[Holding configuration]
As shown in FIGS. 2, 3 and 6, the lid 2 is provided with a lock ring 7 on the side facing the upper surface of the main body 1. The lock ring 7 is annular as shown in FIG. 6, and has a plurality of engaging portions 7a provided at equal intervals.

  Notches 7b are provided between the adjacent engaging portions 7a. The number of the plurality of engaging portions 7 a of the lock ring 7 is the same as the number of the flanged portions 3 b 1 of the inner pot 3. The number of engaging portions 7a and the number of notches 7b are also the same.

  The lock ring 7 is supported by the lid 2 so as to be rotatable around a rotation center D shown in FIG. The lock ring 7 rotates by rotating the lock operation knob 6 shown in FIG. 1 from a reference position described later. The lock operation knob 6 does not rotate infinitely, for example, it rotates about 15 to 20 degrees from the reference position and stops there.

  As described above, the inner pot 3 is accommodated in the inner pot accommodating portion 1 a of the main body 1 so as not to rotate. It is necessary to determine the position of the inner pot 3 so that the positional relationship between the flange projection 3b1 of the inner pot 3 and the engaging portion 7a of the lock ring 7 does not change.

  In a state where the flange projection 3b1 of the inner pot 3 is positioned at the position of the notch 7b of the lock ring 7 when the lock ring 7 and the inner pot 3 are overlapped in a plan view (not shown) That is, the engagement portion 7a of the lock ring 7 sets the position of the lock operation knob 6 when the flange portion 3b is positioned without the flange projection 3b1 of the inner pot 3 as a reference position. When the position of the lock operation knob 6 is at the reference position, the lid 2 can be opened.

  When the locking portion 2a of the lid 2 is engaged with the latch 1d on the upper surface of the main body 1 and the lid 2 closes the upper surface opening of the main body 1, as shown in FIG. The portion 7 a is provided below the flange projection 3 b 1 of the inner pot 3 in the vertical direction.

  As described above, when the lock operation knob 6 is at the reference position, when the lid 2 can be opened and closed, the engagement portion 7 a of the lock ring 7 is the flange projection 3 b 1 of the inner pot 3. It comes to come down below in the up-and-down direction rather than flange projection part 3b1 of inner pot 3 in the position of no flange part 3b.

When the engaging portion 7a of the lock ring 7 is below the flanged projecting portion 3b1 of the inner pot 3 in the vertical direction at the position of the flange portion 3b without the flanged projecting portion 3b1 of the inner pot 3 When the lock ring 7 is rotated by rotating the lock ring 7, the engaging portion 7 a of the lock ring 7 rotates so as to enter under the flange projecting portion 3 b 1 of the inner pot 3.

When the engaging portion 7a of the lock ring 7 and the flange projecting portion 3b1 of the inner pot 3 are overlapped in a plan view (not shown) with the lock ring 7 rotated, the flange projecting portion of the inner pot 3 The engaging portion 7a of the lock ring 7 is located where 3b1 is located. That is, it has rotated to the position where the flange projection part 3b1 of the inner pot 3 and the engaging part 7a of the lock ring 7 overlap.

Further, the engaging portion 7a of the lock ring 7 is engaged so as to overlap in a state of being in contact with the flange projecting portion 3b1 of the inner pot 3, and at this time, the sealing member 5 is attached to the flange portion 3b of the inner pot 3. It is pressed and in contact.

  By rotating the lock ring 7 to a position where the lock operation knob 6 is rotated so that the flange projection 3b1 of the inner pot 3 and the engagement portion 7a of the lock ring 7 overlap with each other, the pressure space P is Since the seal member 5 is in contact with the flange portion 3b of the inner pot 3 so as to be pressed against the pressure of 1 to 2.2 atmospheric pressure, the seal member 5 hangs on the pressure space P from the contact point of the seal member 5 The pressure never escapes. Further, since the engaging portion 7a of the lock ring 7 and the flange projecting portion 3b1 of the inner pot 3 are engaged in an overlapping manner, the pressure of 2.1 to 2.2 atmospheric pressure applied to the pressurizing space P is not lost. The closed state of the lid 2 can be maintained.

  Since the closed state of the lid 2 can be maintained by the engagement of the engagement portion 7a of the lock ring 7 and the flange projection 3b1 of the inner pot 3 in this manner, the engagement portion 7a of the lock ring 7 and the inner pot 3 The flange projection 3b1 serves as locking means for maintaining the cover 2 in the closed state.

In order to engage so that the engaging part 7a of the lock ring 7 and the flange projection part 3b1 of the inner pot 3 overlap with each other reliably, the inner pot 3 is prevented from rotating in the inner pot storage part 1a of the main body 1 as described above. Positioned and housed. By determining the position of the inner pot 3, the positional relationship between the flange extension 3 b 1 of the inner pot 3 and the engaging portion 7 a of the lock ring 7 does not change.

Furthermore, the lid 2 is provided with a plurality of configurations that cause the cooker 100 according to Embodiment 1 of the present invention to function as a cooker that cooks the food at a pressure higher than the atmospheric pressure.

  As shown in FIG. 7, a lock detection means 31 is provided inside the lid 2. The lock detection means 31 detects that the lock ring 7 has rotated until the engagement portion 7a and the flange projection 3b1 of the inner pot 3 are engaged so as to overlap with each other. For example, using a micro switch The lock state and non lock state are detected by the ON and OFF.

When a signal that detects the lock state is transmitted to the control means, the control means determines that the lock state is present, and the operation to start cooking can be performed. In addition, it is displayed on the display means 25b that it is in the locked state. Then, the control means controls the electric motor 51b2 to close the steam valve 51a of the pressure reducing means 51 described later.

When a pressure of 2.1 to 2.2 atmospheric pressure is applied in a state in which the engaging portion 7a of the lock ring 7 and the flange projection 3b1 of the inner pot 3 are not engaged, the lid 2 is opened, and high temperature steam or heat Since there is a risk of water spouting, the engagement state is detected to ensure safety.

  4 b shown in FIGS. 2, 3 and 6 is a pressure adjusting means. The pressure applied to the pressurizing space P is pressurized by the steam pressure of the water vapor generated by heating the food such as the food or the water contained in the pressurizing space P in the process of cooking. Since it is dangerous if pressure is applied too much, the pressure applied to the pressurizing space P is adjusted to be 2.1 to 2.2 atm.

When the pressure in the pressurized space P becomes 2.2 atmospheric pressure or more, a pressure regulating valve (not shown) of the pressure regulating means 4b is opened to release the pressure. Since the steam is discharged when the pressure is released, the discharged steam passes through the steam discharge portion 2c, which is a cartridge for steam discharge shown in FIG. 3, and is discharged from the cooker out of the exhaust port 2b shown in FIG. Ru. The steam discharger 2 c also has a function of suppressing the momentum of the steam discharged to the outside of the cooker by a labyrinth structure (not shown).

  4c shown in FIGS. 2 and 6 is a pressure state detection means. The pressure state detection means 4c will be described with reference to FIGS. FIG. 8 (a) is a cross-sectional view of the main part when the inner pan internal pressure detecting means of the cooking device according to Embodiment 1 of the present invention is lower than the atmospheric pressure, and FIG. FIG. 8C is a cross-sectional view of the main part when the inner pot internal pressure detection means of the cooking device according to Embodiment 1 of the invention is in the same state as atmospheric pressure; FIG. 8C is the cooking according to Embodiment 1 of the present invention It is principal part sectional drawing in case the internal pot internal pressure detection means of a vessel is the state to which predetermined | prescribed pressure higher than atmospheric pressure has been applied.

(Pressure condition detection means)
The pressure state detection means 4c detects the pressure state in the pressurizing space P, and is constituted by pressure state detection switches 41 and 42, a detection lever 43, a lever movable force transmission means 44, and a seal packing 45. The pressure state detection switch 41 is a switch that detects a state in which the pressure is higher than the atmospheric pressure. The pressure state detection switch 42 is a switch that detects a state in which the pressure is lower than the atmospheric pressure.

  The pressure state detection switches 41 and 42 are photosensors, and are configured to detect that the detection lever 43 moves and blocks the light of the photosensor. The detection lever 43 is operated by the lever power transmission means 44.

The lever power transmission means 44 is biased by the seal packing 40 formed of silicone rubber, and when the pressure in the pressurizing space P is in the same state as the atmospheric pressure, as shown in FIG. 43 is positioned so as not to block the light of either of the photosensors of the pressure state detection switches 41 and 42.

  When the pressure in the pressurized space P is higher than the atmospheric pressure by 1.05 atmospheres or more, as shown in FIG. 8C, the lever power transmission means 44 is pushed upward by the pressure. When the detection lever 43 operates upward by the lever power transmission means 44 pushed up to block the light of the photo sensor of the pressure state detection switch 41, the pressure in the pressurizing space P is higher than the atmospheric pressure. To detect The detection signal is transmitted to control means (not shown) via a connection line (not shown). This detection state is displayed by an LED (not shown) or the display means 25b.

  In the cooking apparatus according to the first embodiment of the present invention, the pressure is applied for cooking, and the pressure does not naturally return to the atmospheric pressure for pressure adjustment, that is, the pressurized space P becomes a closed space. Therefore, when the temperature in the pressure space P is lowered, the pressure in the pressure space P becomes negative pressure, and the lid 2 can not be opened.

  Therefore, when the pressure in the pressurizing space P becomes negative, as shown in FIG. 8A, the lever power transmitting means 44 is pulled to the pressurizing space P side, so the lever power transmitting means 44 is added. When the detection lever 43 operates downward to block the light of the photo sensor of the pressure state detection switch 42 by falling downward as the pressure space P side, it is detected that the pressure space P has a negative pressure. The detection signal is transmitted to a microcomputer, which is a control unit (not shown), via a connection line (not shown). This detection state is displayed by an LED (not shown) or the display means 25b.

In the negative pressure state, the control means operates the forcible opening means (not shown) to return the pressure of the pressurizing space P to the same state as the atmospheric pressure shown in FIG. 8 (b) and open the lid 2 Make it The forced opening means may be operated manually without the control unit.

  When the pressure in the pressurized space P is higher than the atmospheric pressure and a pressure of 1.05 atmospheres or more is applied, if the lid 2 is opened, high temperature, high pressure steam may be ejected and it is dangerous. Therefore, the lid 2 is provided with a safety device 45 shown in FIG. 7 that prevents the lid 2 from being opened in this state. The safety device 45 will be described with reference to FIGS. Fig.9 (a) is the perspective view which looked at the state which removed the shell part of the lid of the cooking device based on Embodiment 1 of this invention from the direction different from FIG. 7, FIG.9 (b) is a figure. 9 (a) is a cross-sectional view cut in the front-rear direction along a cutting line C-C shown in FIG. 9 (a), and FIG. 9 (c) is an enlarged view of a portion G shown in FIG.

(Safety device)
45 shown in FIG. 7 is a safety device. The safety device 45 has a safety device drive shaft 45a and a safety device movable part 45b. The safety device movable portion 45 b operates in conjunction with the rotation of the lock operation knob 6. Although FIG. 7 does not illustrate the lock operation knob 6, the lock ring turning lever 6b, which operates when the lock operation knob 6 is rotated, is in a locked state (the engaging portion 7a of the lock ring 7 and the flange of the inner pot 3) It is shown that the projecting portion 3b1 is in the engaged position.

When the lock operation knob 6 (not shown in FIG. 7) is rotated in the direction E shown in FIG. 7, that is, the direction for releasing the lock state from this state, the lock ring pivot lever 6b attached to the knob rotation portion 6a. However, the lock ring drive shaft 6c provided on the lock ring 7 is rotated in the E direction shown in FIG. 7, and the lock ring 7 is accordingly rotated in the E direction.

At this time, the lock ring pivot lever 6b moves the safety device drive shaft 45a provided on the safety device 45 in the direction of F shown in FIG. As a result, the safety device movable portion 45b also moves in the direction of F.

As described above, when a pressure of 1.05 atm or higher, which is higher than the atmospheric pressure, is applied to the pressurized space P, as shown in FIG. 8C, the lever power transmission means 44 is moved upward by the pressure. The detection lever 43 is moved upward by the lever power transmission means 44 pushed up and pushed up.

When the detection lever 43 is positioned at the upper side, in other words, when pressure of 1.05 atmospheric pressure or higher higher than the atmospheric pressure is applied to the pressurizing space P, the lock operation knob 6 is in the direction to release the lock state. When it is rotated, as shown in FIGS. 9B and 9C, the detection lever 43 and the safety device movable portion end 45c of the safety device movable portion 45b contact each other, and the safety device movable portion 45b further moves in the F direction. become unable. That is, as the safety device movable portion 45b can not move, the interlocking lock operation knob 6 can not be rotated.

Therefore, when the safety device 45 applies a pressure of 1.05 atmospheric pressure or more higher than the atmospheric pressure to the pressurizing space P, the lock operation knob 6 can not be rotated to the position for releasing the lock state, When in the pressurized state, the lid 2 can be opened to avoid the danger of high pressure steam and the like.

  In this case, the internal pressure is less than 1.05 atm in absolute pressure (consumption in the technical standards of the Consumer Product Safety Act) that the set value at which the lid 2 can not be opened is 1.05 atm or higher. In terms of product safety law for household use, the structure is such that the lid can not be opened unless the gauge pressure is less than 5.0 kilopascals).

Here, the gauge pressure of consumer product safety law is less than 5.0 kilopascals, because 1 atmospheric pressure is about 100.0 kilopascals in gauge pressure, 5.0 kilopascals is 0.05 atmospheres It becomes. Therefore, the absolute pressure is 1.05 atm, so the pressure less than 5.0 kilopascal and the absolute pressure less than 1.05 atm are the same pressure.

When the pressurized space P is in the same state as the atmospheric pressure or in the negative pressure state, the position of the detection lever 43 is lowered so as not to prevent the safety device movable part 45b from moving in the F direction. However, in the negative pressure state, even if it can be rotated to the position where the locked state is released, the forced opening means must be operated to return the pressure of the pressurizing space P to the same state as the atmospheric pressure. For example, the lid 2 can not be opened.

(Decompression means)
Next, the pressure reducing means 51 for returning the pressure of the pressurized space P pressurized to the atmospheric pressure will be described with reference to FIGS. 4 and 10 to 13.
Fig.10 (a) is a figure showing the full open state of the steam valve by the steam valve opening-closing means of the pressure reduction means of the cooking device based on Embodiment 1 of this invention, FIG.10 (b) is an embodiment of this invention 11 is an enlarged view of the main part around the steam valve in the fully open state of the cooker according to 1; FIG. 11 (a) is a steam valve fully closed by the steam valve opening and closing means of the pressure reducing means of the cooker according to the first embodiment of the present invention FIG. 11 (b) is an enlarged view of an essential part around a steam valve in a fully closed state of the cooker according to Embodiment 1 of the present invention, and FIG. 12 is a diagram showing Embodiment 1 of the present invention. The perspective view which shows the structure of the steam valve opening-and-closing means of the decompression means of the cooker concerned, Drawing 13 (a) shows the steam valve opening-and-closing means when the steam valve of the cooker concerning Embodiment 1 of this invention is full open. FIG. 13 (b) shows the steam valve opening / closing means when the steam valve of the cooker according to the first embodiment of the present invention is in the process of being closed. To the state diagram, FIG. 13 (c) is a state diagram illustrating a steam valve opening and closing means when the cooker of the steam valve according to the first embodiment of the fully closed of the present invention.

  As shown in FIG. 4, the pressure reducing means 51 is provided on the lid 2. As shown in FIGS. 10 and 11, the pressure reducing means 51 is composed of a steam valve 51a and a steam valve opening / closing means 51b. The steam valve 51a includes a valve body 51a1, a spring 51a2, a guide member 51a3, a seal receiving member 51a4, and a seal member 51a5.

    As shown in FIGS. 10 and 11, a guide member 51a3 for holding the valve body 51a1 so as to stably move in the vertical direction is provided on the outer periphery of the valve body 51a1 of the steam valve 51a. As shown in FIGS. 11A and 11B, the valve body 51a1 is a valve body by the biasing force of a spring 51a2 which is an elastic body sandwiched between the valve body spring holding portion 51a11 of the valve body 51a1 and the guide member 51a3. A seal member 51a5 provided on the outer periphery of 51a1 is biased in a direction (upward direction) to be pressed against the seal receiving member 51a4.

  In the steam valve 51a, the seal member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the biasing force of the spring 51a2, so that the steam generated in the pressurized space P is transferred to the steam discharge portion 2c. Shut off the drained path.

  The steam valve opening / closing means 51b is composed of a slide member 51b1, a motor 51b2 (see FIG. 12), a steam valve drive member 51b3, and a slide contact portion 51b4. Here, the operation of the steam valve opening / closing means 51b opening / closing the steam valve 51a will be described with reference to FIG. In addition, in FIG. 13, for convenience of describing the operation of the steam valve opening / closing means 51b, it is noted that the figure in which the steam valve 51a is omitted is shown.

  As described above, when the signal detecting the lock state is transmitted to the control means (not shown), the control means determines that the lock state is present, and the operation of cooking start can be performed. The steam valve opening / closing means 51b shown in FIG. 13A is in a state when the steam valve 51a is fully opened before the start of cooking.

  When the steam valve 51a is fully open, the flat portion 71 at the lowest position in the vertical direction of the slide member 51b1 is in contact with the slide contact portion 51b4 of the steam valve drive member 51b3. The slide contact portion 51b4 of the steam valve drive member 51b3 for operating the valve body 51a1 of the steam valve 51a downward is in contact with the lowermost position in the vertical direction of the slide member 51b1, the steam valve drive member 51b3 is also the lowest Has moved to the position of.

  The input for starting the cooking causes the control means to drive the electric motor 51b2 which is a stepping motor so as to close the steam valve 51a of the pressure reducing means 51.

  When the motor 51b2 is driven, the pinion gear 502 attached to the motor 51b2 is rotationally driven, and the pinion gear 502 transmits the driving force of the motor 51b2 to the rack gear 501 attached to the slide member 51b1. By this driving force, the slide member 51b1 moves in the H direction shown in FIG.

  From the flat portion 71 to the flat portion 71, the flat portion 71 located at the lowest position in the vertical direction of the slide member 51b1 and the flat portion 73 at the uppermost position in the vertical direction of the slide member 51b1. A ramp 72 is provided which is inclined towards 73.

  When the slide member 51b1 moves in the H direction shown in FIG. 13, the slide contact portion 51b4 of the steam valve drive member 51b3 that was in contact with the flat portion 71 comes in contact with the inclined portion 72 as shown in FIG. .

  Since the inclined portion 72 is inclined upward from the flat portion 71 toward the flat portion 73, the slide contact portion 51b4 in contact with the inclined portion 72 gradually rises along the inclined portion 72, At the same time, the steam valve drive member 51b3 also gradually rises.

  As the steam valve drive member 51b3 ascends, the valve body 51a1 also ascends gradually. When the slide contact portion 51b4 moves up along the inclination of the inclined portion 72, as shown in FIG. 13C, the position of the slide contact portion 51b4 from the inclined portion 72 in the vertical direction of the slide member 51b1 It moves to the place which touches flat part 73 which becomes.

  The slide contact portion 51b4 of the steam valve drive member 51b3 for operating the valve body 51a1 of the steam valve 51a downward is in contact with the uppermost position in the vertical direction of the slide member 51b1, the steam valve drive member 51b3 is also the uppermost Has moved to the position of.

  When the steam valve driving member 51b3 is at the uppermost position, as shown in FIGS. 11A and 11B, the attachment of the spring 51a2 held by the valve body spring holding portion 51a11 of the valve body 51a1 and the guide member 51a3. The sealing member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the force.

  The seal member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the biasing force of the spring 51a2 so that the steam generated in the pressurized space P passes from the passage 51a6 through the space 51a7, The path discharged through the gap 51a8 between the seal member 51a5 and the seal receiving member 51a4 and discharged to the steam discharge portion 2c is blocked. That is, the steam valve 51a is completely closed.

  Cooking is started from the state in which the steam valve 51a is closed and the pressurized space P formed by the inner lid 4 and the inner pot 3 sealed by the sealing member 5 is sealed, and pressurization is performed by steam generated from the food to be cooked The pressure in the space P rises.

  As described above, since the pressurized space P is sealed, if the pressure in the pressurized space P exceeds 2.1 to 2.2 atmospheric pressure suitable for cooking during cooking, the pressure regulating valve of the pressure regulating means 4b The opening pressure (steam) is released and the pressure in the pressurized space P is adjusted to be 2.1 to 2.2 atm suitable for cooking.

  In the cooker 100 according to the first embodiment of the present invention, the pressure in the pressurized space P is high immediately after the cooking is completed even if the cooking is finished, in the cooker which cooks the food at a pressure higher than the atmospheric pressure. It is dangerous to open the lid 2 in this state. Moreover, even if it is going to open, the cover 2 can not be opened by the pressure state detection means 4c and the safety device 45. Therefore, it is necessary to discharge the pressure in the pressurized space P, in other words, to discharge the steam whose pressure is increased.

  After the completion of the heating and cooking, the control means drives the motor 51b2 to open the steam valve 51a from the state where the steam valve 51a is closed. When the motor 51b2 is driven, the pinion gear 502 attached to the motor 51b2 is rotationally driven, and the pinion gear 502 transmits the driving force of the motor 51b2 to the rack gear 501 attached to the slide member 51b1. The slide member 51b1 moves in the J direction shown in FIG. 13 by this driving force.

  When the slide member 51b1 moves in the J direction shown in FIG. 13, the slide contact portion 51b4 shown in FIG. 13 (a) is located at the flat portion 73 at the uppermost position in the vertical direction of the slide member 51b1. It moves to the inclined part 72 which follows the flat part 73 shown to b).

The slide contact portion 51b4 in contact with the inclined portion 72 moves from the top to the bottom (K to L shown in FIG. 13) along the inclination of the inclined portion 72 along with the movement of the slide member 51b1 in the J direction. Moving. Since the slide contact portion 51b4 moves from the top to the bottom, naturally, the steam valve drive member 51b3 also moves from the top to the bottom.

  As the steam valve drive member 51b3 moves downward, the valve body 51a1 is pushed downward by the steam valve drive member 51b3, and the seal member 51a5 provided on the outer periphery of the valve body 51a1 is sealed by the biasing force of the spring 51a2. The seal member 51a5 moves in a direction (downward direction) away from the seal receiving member 51a4 from the state of being pressed against the receiving member 51a4.

  Since the steam valve driving member 51b3 gradually moves downward along the inclination of the inclined portion 72, the valve body 51a1 also gradually moves downward. As the valve body 51a1 gradually moves downward, the seal member 51a5 gradually separates from the seal receiving member 51a4. When the seal member 51a5 separates from the seal receiving member 51a4, a gap 51a8 shown in FIG. 10B appears there, and pressure is applied to the pressurizing space P, so that steam is discharged from the passage 51a6 to the space 51a7. It passes through the gap 51a8 between the seal member 51a5 and the seal receiving member 51a4 and passes through the gap 51a5 to be discharged to the steam discharge part 2c, that is, the pressure is released.

  Immediately after the seal member 51a5 is separated from the seal receiving member 51a4, since the gap 51a8 shown in FIG. 10 (b) through which the steam can pass is still narrow, the discharge amount of the steam is suppressed. Therefore, since the high temperature and high pressure steam does not immediately pass through the steam discharge portion 2c and is discharged from the exhaust port 2b to the outside of the cooking device, the steam can be safely discharged.

  Since the slide contact portion 51b4 gradually moves upward from the bottom along the inclination of the inclined portion 72, the seal member 51a5 gradually separates from the seal receiving member 51a4. Thus, since the seal member 51a5 gradually separates from the seal receiving member 51a4, the gap 51a8 shown in FIG. 10 (b) through which steam can pass gradually widens.

That is, the pressure is lowered by gradually discharging the steam by gradually widening the gap 51a8 in accordance with the movement of the valve body 51a1 which moves downward gradually. The discharged steam passes through the passage 51a5 and the gap 51a8 as shown in FIG. 10A, and further passes through the steam discharging portion 2c which is a cartridge for discharging steam, and is discharged from the exhaust port 2b to the outside of the cooker. .

  With the above configuration, when the steam discharge is started, the steam discharge amount is reduced and the steam is gradually discharged, so the steam can be discharged safely without sudden discharge Therefore, the pressure in the pressurized space P can be reduced safely.

Second Embodiment
The cooker according to Embodiment 2 of the present invention relates to Embodiment 1 of the present invention in that the configuration of the flow rate adjustment valve is further added to the configuration of the cooker according to Embodiment 1 of the present invention. Different from the cooker. The other configuration is the same as that of the cooker according to the first embodiment of the present invention. Therefore, the configuration of the flow rate adjustment valve different from the heating cooker according to the first embodiment of the present invention will be described here with reference to FIG. 14, and the description other than that is omitted.

  Fig.14 (a) is a principal part enlarged view showing the state where the opening of the flow control valve provided in the steam discharge part of the cooking device concerning Embodiment 2 of the present invention is wide, and FIG.14 (b) is this It is the principal part enlarged view which represented the state to which the opening of the flow control valve provided in the steam discharge part of the cooking appliance which concerns on Embodiment 2 of invention was narrow. The cooker according to the second embodiment of the present invention is provided with a flow control valve 81 as shown in FIG. The flow control valve 81 is provided upstream of the steam valve 51 a in the flow of steam.

  The flow rate adjustment valve 81 has an opening 81c and moves in a direction in which the movable portion 81a movable by the pressure of steam, the fixed portion 81b integral with the fixed portion frame 81d, and the opening 81c of the movable portion 81a are separated from the fixed portion 81b It comprises a spring 82 as biasing means for biasing and a movable portion holding cover 83 for holding the movable portion 81a.

  The movable portion 81a of the flow rate adjustment valve 81 is, for example, the biasing force of the spring 82 as shown in FIG. 14 (b) by the wind force generated by the flow of steam when the pressure of the steam of 2.1 atmospheric pressure or more is applied. It moves toward the upper side (steam valve steam valve 51a side) against.

  When the movable portion 81a moves upward (toward the steam valve steam valve 51a), the gap 84 between the opening 81c and the fixed portion 81b, which is a path through which steam passes, narrows. That is, when the movable portion 81a moves upward due to the wind force generated by the flow of the steam, the passage path of the steam narrows, so that the flow rate of the passing steam is suppressed.

  If the wind force generated by the flow of steam is lower than when the pressure of the steam of 2.1 atmospheric pressure or more is applied, the biasing force of the spring 82 becomes superior to the wind force, so the movable portion 81a is fixed. It moves downward in the direction away from the part 81 b. This movement widens the gap 84 between the opening 81c and the fixed portion 81b, which is a path through which the steam passes, so that the flow rate through which the steam passes increases.

As described above, the cooker according to the first embodiment of the present invention includes the flow control valve 81 for adjusting the flow rate of steam by wind power generated by the flow of steam upstream of the flow of steam from the steam valve 51a. There is.

  The input for starting the cooking causes the control means to drive the electric motor 51b2 which is a stepping motor so as to close the steam valve 51a of the pressure reducing means 51.

  When the motor 51b2 is driven, the pinion gear 502 attached to the motor 51b2 is rotationally driven, and the pinion gear 502 transmits the driving force of the motor 51b2 to the rack gear 501 attached to the slide member 51b1. By this driving force, the slide member 51b1 moves in the H direction shown in FIG.

  From the flat portion 71 to the flat portion 71, the flat portion 71 located at the lowest position in the vertical direction of the slide member 51b1 and the flat portion 73 at the uppermost position in the vertical direction of the slide member 51b1. A ramp 72 is provided which is inclined towards 73.

  When the slide member 51b1 moves in the H direction shown in FIG. 13, the slide contact portion 51b4 of the steam valve drive member 51b3 that was in contact with the flat portion 71 comes in contact with the inclined portion 72 as shown in FIG. .

  Since the inclined portion 72 is inclined upward from the flat portion 71 toward the flat portion 73, the slide contact portion 51b4 in contact with the inclined portion 72 gradually rises along the inclined portion 72, At the same time, the steam valve drive member 51b3 also gradually rises.

  As the steam valve drive member 51b3 ascends, the valve body 51a1 also ascends gradually. When the slide contact portion 51b4 moves up along the inclination of the inclined portion 72, as shown in FIG. 13C, the position of the slide contact portion 51b4 from the inclined portion 72 in the vertical direction of the slide member 51b1 It moves to the place which touches flat part 73 which becomes.

  The slide contact portion 51b4 of the steam valve drive member 51b3 for operating the valve body 51a1 of the steam valve 51a downward is in contact with the uppermost position in the vertical direction of the slide member 51b1, the steam valve drive member 51b3 is also the uppermost Has moved to the position of.

  When the steam valve driving member 51b3 is at the uppermost position, as shown in FIGS. 11A and 11B, the attachment of the spring 51a2 held by the valve body spring holding portion 51a11 of the valve body 51a1 and the guide member 51a3. The sealing member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the force.

  The seal member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the biasing force of the spring 51a2 so that the steam generated in the pressurized space P passes from the passage 51a6 through the space 51a7, The path discharged through the gap 51a8 between the seal member 51a5 and the seal receiving member 51a4 and discharged to the steam discharge portion 2c is blocked. That is, the steam valve 51a is completely closed.

  Cooking is started from the state in which the steam valve 51a is closed and the pressurized space P formed by the inner lid 4 and the inner pot 3 sealed by the sealing member 5 is sealed, and pressurization is performed by steam generated from the food to be cooked The pressure in the space P rises.

  As described above, the pressurized space P is sealed. When cooking starts. As shown in FIG. 14A, in the state where the movable portion 81a of the flow rate adjustment valve 81 is moved downward by the biasing force of the spring 82, the valve body 51a1 of the steam valve 51a is the valve body of the valve body 51a1. The sealing member 51a5 provided on the outer periphery of the valve body 51a1 is pressed against the seal receiving member 51a4 by the biasing force of the spring 51a2 held by the spring holding portion 51a11 and the guide member 51a3 and generates in the pressurizing space P. It is in a state of blocking and closing the path through which the discharged steam passes from the passage 51a6 to the space 51a7, passes through the gap 51a8 between the seal member 51a5 and the seal receiving member 51a4, and is discharged to the steam discharge portion 2c.

  When the movable portion 81a of the flow rate adjustment valve 81 is moved downward by the biasing force of the spring 82, the gap 84 between the opening 81c and the fixed portion 81b is wide, as shown in FIG. Since the space M and the pressurizing space P between the steam valve 51a and the flow rate adjusting valve 81 shown in (b) communicate with each other, the same pressure as the pressurizing space P is applied to the space M during cooking. . Further, since the flow of the wind due to the movement of the steam does not occur in the sealed space, the movable portion 81a of the flow control valve 81 does not move when the steam valve 51a is closed.

  Since the pressurized space P is sealed, if the pressure in the pressurized space P exceeds 2.1 to 2.2 atmospheric pressure suitable for cooking during cooking, the pressure regulating valve of the pressure adjusting means 4b opens and the pressure ( The steam is released and the pressure in the pressurized space P is adjusted to be 2.1 to 2.2 atm suitable for cooking.

  In the cooker 100 according to the first embodiment of the present invention, the pressure in the pressurized space P is high immediately after the cooking is completed even if the cooking is finished, in the cooker which cooks the food at a pressure higher than the atmospheric pressure. It is dangerous to open the lid 2 in this state. Moreover, even if it is going to open, the cover 2 can not be opened by the pressure state detection means 4c and the safety device 45. Therefore, it is necessary to discharge the pressure in the pressurized space P, in other words, to discharge the steam whose pressure is increased.

  After the completion of the heating and cooking, the control means drives the motor 51b2 to open the steam valve 51a from the state where the steam valve 51a is closed. When the motor 51b2 is driven, the pinion gear 502 attached to the motor 51b2 is rotationally driven, and the pinion gear 502 transmits the driving force of the motor 51b2 to the rack gear 501 attached to the slide member 51b1. The slide member 51b1 moves in the J direction shown in FIG. 13 by this driving force.

  When the slide member 51b1 moves in the J direction shown in FIG. 13, the slide contact portion 51b4 shown in FIG. 13 (c) becomes the uppermost position in the vertical direction of the slide member 51b1. It moves to the inclined part 72 which follows the flat part 73 shown to b).

The slide contact portion 51b4 in contact with the inclined portion 72 moves from the top to the bottom (K to L shown in FIG. 13) along the inclination of the inclined portion 72 along with the movement of the slide member 51b1 in the J direction. Moving. Since the slide contact portion 51b4 moves from the top to the bottom, naturally, the steam valve drive member 51b3 also moves from the top to the bottom.

  As the steam valve drive member 51b3 moves downward, the valve body 51a1 is pushed downward by the steam valve drive member 51b3, and the seal member 51a5 provided on the outer periphery of the valve body 51a1 is sealed by the biasing force of the spring 51a2. The seal member 51a5 moves in a direction (downward direction) away from the seal receiving member 51a4 from the state of being pressed against the receiving member 51a4.

  Since the steam valve driving member 51b3 gradually moves downward along the inclination of the inclined portion 72, the valve body 51a1 also gradually moves downward. As the valve body 51a1 gradually moves downward, the seal member 51a5 gradually separates from the seal receiving member 51a4. When the seal member 51a5 separates from the seal receiving member 51a4, a gap 51a8 shown in FIG. 10B appears there, and pressure is applied to the pressurizing space P, so that steam is discharged from the passage 51a6 to the space 51a7. It passes through the gap 51a8 between the seal member 51a5 and the seal receiving member 51a4 and passes through the gap 51a5 to be discharged to the steam discharge part 2c, that is, the pressure is released.

  Immediately after the seal member 51a5 is separated from the seal receiving member 51a4, since the gap 51a8 shown in FIG. 10 (b) through which the steam can pass is still narrow, the discharge amount of the steam is suppressed. Therefore, since the high temperature and high pressure steam does not immediately pass through the steam discharge portion 2c and is discharged from the exhaust port 2b to the outside of the cooking device, the steam can be safely discharged.

  If the passage of steam is created in the pressurized space P with a pressure of 2.1 to 2.2 atm, the passage of the steam is started and the flow of steam is generated. Since wind power is generated by the flow of the steam, the movable portion 81a of the flow rate adjustment valve 81 moves upward against the biasing force of the spring 82 as shown in FIG. 14 (b).

  When the movable portion 81a moves upward, the gap 84 between the opening 81c and the fixed portion 81b, which is a path through which the steam passes as described above, is narrowed, so that the flow rate of the steam is suppressed. High-temperature, high-pressure steam is not discharged from the pressurized space P at a stretch.

  Since the slide contact portion 51b4 gradually moves from the top to the bottom along the inclination of the inclined portion 72, the seal member 51a5 gradually separates from the seal receiving member 51a4. Thus, since the seal member 51a5 gradually separates from the seal receiving member 51a4, the gap 51a8 shown in FIG. 14 (b) through which steam can pass gradually widens.

That is, the pressure is lowered by gradually discharging the steam by gradually widening the gap 51a8 in accordance with the movement of the valve body 51a1 which moves downward gradually. The discharged steam passes through the passage 51a5 and the gap 51a8, and further passes through the steam discharging portion 2c which is a cartridge for discharging steam, and is discharged from the exhaust port 2b to the outside of the cooker.

  With the above configuration, when the steam discharge is started, the steam discharge amount is reduced and the steam is gradually discharged, so the steam can be discharged safely without sudden discharge Therefore, the pressure in the pressurized space P can be reduced safely.

  D rotation center, M space, P pressure space, 1 main body, 1a inner pot storage portion, 1b hinge portion, 1c lid open button, 1d latch, 1e display portion, 1f operation button, 2 lid, 2a locked Part, 2b exhaust port, 2c steam discharge part, 3 inner pot, 3a handle, 3b flange part, 3b1 flange extension part, 3c body part, 3d bottom part, 4 inner lid, 4a inner lid fixing means, 4b pressure adjusting means, 4c pressure state detecting means, 5 seal member, 6 lock operation knob, 6a knob rotation portion, 6b lock ring pivot lever, 6c lock ring drive shaft, 7 lock ring, 7a engagement portion, 7b notch portion, 8 temperature detection Means, 11 heating means, 12 heating means, 21 rotation shaft, 22 hinge spring, 23 substrates, 24 air blowing means, 25 operation display board, 25a operation means, 25b display means Reference Signs List 31 lock detection means, 40 seal packing, 41 pressure state detection switch, 42 pressure state detection switch, 43 detection lever, 44 lever movable force transmission means, 45 safety device, 45a safety device drive shaft, 45b safety device movable portion, 45c safety Device movable part end, 51 pressure reducing means, 51a steam valve, 51a1 valve body, 51a11 valve body spring holding portion, 51a2 spring, 51a3 guide member, 51a4 seal receiving member, 51a5 seal member, 51a6 passage, 51a7 space, 51a8 gap, 51b steam valve opening / closing means, 51b1 slide member, 51b2 electric motor (stepping motor), 51b3 steam valve drive member, 51b4 slide contact portion, 71 flat portion, 72 inclined portion, 73 flat portion, 81 flow control valve, 81a movable portion, 81b fixed part, 81 Opening, 81d fixing unit frame, 82 spring, 83 the movable portion retaining cover, 84 a gap 501 rack gear, 502 pinion gear, 100 cooker.

Claims (3)

A body having an opening at the top,
An inner pot having a bottom and having an opening at its upper end, which is accommodated in the main body so as to be able to be taken in and out of the main body opening;
A lid rotatably mounted on the main body and covering an upper portion of the main body;
An inner lid provided on the lid, having a seal member, and allowing the seal member to abut on the entire circumference of the upper end opening of the inner pot to sealably cover the inner pot;
Locking means for holding the sealed state of the inner pot and the inner lid even when a predetermined pressure higher than atmospheric pressure is applied to the inner space sealed by the inner pot and the inner lid;
Pressure reducing means for returning from the predetermined pressure applied to the inner space sealed by the inner pot and the inner lid to the same pressure as the atmospheric pressure;
And heating means provided in the main body to heat the inner pot,
The pressure reducing means opens the steam valve to discharge the steam and lowers the pressure, and the steam valve operates to open by the driving force of the motor controlled by the control means and closes by the biasing means. Cooker.   The cooker according to claim 1, further comprising a flow control valve for adjusting the flow rate of steam by wind power generated by the flow of steam.   The said flow control valve is a cooking device of Claim 2 provided upstream of the flow of steam rather than the said steam valve.

Images