JP6410956B2 - Cooker and lid - Google Patents

Description

  The present invention relates to a heating cooker and its lid, and more particularly to decompression inside a cooking vessel.

  Conventionally, there are various proposals relating to the adjustment of the pressure inside the cooking container in a heating cooker such as a pressure cooker. For example, Patent Document 1 discloses a rice cooking pot that is a cooking container, its lid, first and second exhaust passages that allow the inside and outside of the rice cooking pot to communicate, and a first that closes the first exhaust passage. , A second valve body for closing the second exhaust passage, and first and second drive means (solenoids) for operating the first and second valve bodies by on / off control, respectively. We have proposed a cooking device (pressure cooker).

JP 2009-82755 A (for example, FIG. 1, abstract, claim 1)

  However, in the above-described conventional cooking device, the valve bodies (first and second valve bodies) provided in the exhaust passages (first and second exhaust passages) are turned on and off (open state and closed state 2). Therefore, the steam discharge rate (discharge amount per unit time) cannot be made constant. Therefore, when the exhaust passage is opened when the pressure inside the cooking container is high (when the valve body is switched to the open state), the steam is released from the exhaust passage immediately after opening, so that the user feels uncomfortable (for example, , Surprise or fear). Further, in order to prevent the user from feeling uncomfortable, when the exhaust passage is formed as a passage having a small opening area, the steam discharge speed is slow, so that the inside of the cooking container can be moved in a short time. There is a problem that the pressure cannot be reduced (that is, quickly).

  The present invention has been made to solve the above-described problems of the prior art, and is capable of reducing the pressure inside the cooking container in a short time without causing discomfort to the user and its lid. The purpose is to provide.

  A cooking device according to the present invention includes a cooking container having an opening, a lid that closes the opening, a pressure-receiving unit that is movably provided in the lid and is displaced according to the pressure inside the cooking container, A valve body movably provided with respect to the lid body, and a steam discharge port for communicating the inside and the outside of the cooking container with either the lid body or the pressure receiving portion. The opening area of the discharge port is adjusted by the valve body, and the opening area gradually increases in accordance with the displacement of the pressure receiving portion during the decompression process inside the cooking vessel.

  The lid according to the present invention includes a lid that closes the opening of the cooking container having an opening, a pressure-receiving portion that is movably provided in the lid and is displaced according to the pressure inside the cooking container, and the lid A valve body that is movable relative to the body, and is provided with a steam discharge port that allows the inside and the outside of the cooking container to communicate with either the lid body or the pressure receiving portion. The opening area is adjusted by the valve body, and the opening area gradually increases according to the displacement of the pressure receiving portion during the pressure reducing process inside the cooking vessel.

  ADVANTAGE OF THE INVENTION According to this invention, decompression inside a cooking container can be performed in a short time, without giving a user discomfort.

It is a longitudinal cross-sectional view which shows roughly the structure (the locked state of a steam exhaust valve) of the heating cooker which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows roughly the structure (unlocked state of a steam exhaust valve) of the principal part of the heating cooker shown by FIG. It is a figure which shows roughly an example of a structure of the control system of the heating cooker shown by FIG. (A) And (b) is explanatory drawing which shows roughly an example of operation | movement of the steam exhaust valve of the heating cooker shown by FIG. 1, a pressure receiving part, and a link mechanism. (A)-(d) is a timing chart which shows an example of the steam | vapor discharge | emission operation | movement in the pressure reduction process of the cooking-by-heating machine shown by FIG. It is a longitudinal cross-sectional view which shows schematically the structure (when the pressure inside a cooking vessel is equal to atmospheric pressure) of the steam discharge part with which the cover body of the heating cooker which concerns on Embodiment 2 of this invention was equipped. (A) And (b) is a longitudinal cross-sectional view which shows roughly the steam discharge operation | movement (pressure regulation operation | movement) of the steam discharge part in the heating process of the heating cooker which concerns on Embodiment 2. FIG. (A) And (b) is a longitudinal cross-sectional view which shows roughly the steam discharge operation | movement (pressure reduction operation | movement) of the steam discharge part in the pressure reduction process of the heating cooker which concerns on Embodiment 2. FIG. It is a partially notched perspective view which shows roughly the structure of the steam discharge part of the heating cooker which concerns on the modification of Embodiment 2. FIG. (A) And (b) is the side view and sectional drawing which show operation | movement of the steam discharge part of the heating cooker shown by FIG.

<< 1 >> Embodiment 1
<< 1-1 >> Configuration FIG. 1 is a longitudinal sectional view schematically showing the structure of the heating cooker 1 (the locked state of the steam discharge valve 31) according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view schematically showing the structure of the main part of the cooking device 1 shown in FIG. 1 (the unlocked state of the steam discharge valve 31). The heating cooker 1 is also called a pressure rice cooker, a pressure cooker, a pressure cooker, and a heating pressure cooker, for example.

  As shown in FIG. 1 and FIG. 2, the heating cooker 1 includes a cooking container (cooking pan) 11 that is a pot-like container having an opening 11 a as a main component. The heating cooker 1 also has a steam discharge port (communication hole) 21 a that communicates the inside 11 e (a space for storing the object to be heated) and the outside (the atmospheric space) of the cooking container 11, and the opening of the cooking container 11. An inner lid 21 is provided as a lid for closing the portion 11a. In addition, the heating cooker 1 is movably provided in the inner lid 21, is movably provided with respect to the inner lid 21, and is movably provided with a pressure receiving portion 32 that is displaced (moved) according to the pressure in the inside 11 e of the cooking container 11, and steam A steam discharge valve 31 is provided as a valve body for adjusting the opening area of the discharge port 21a. Here, the displacement of the pressure receiving part 32 may be, for example, either movement without translation (translation) or movement with deformation (extension / contraction). In the example shown in FIGS. 1 and 2, the pressure receiving portion 32 is formed of a bellows-like member (expandable member or elastic member) that is displaced in a guide hole 21 b that is a communication hole formed in the inner lid 21. . The pressure receiving part 32 isolates the inside 11e and the outside of the cooking container 11 in the guide hole 21b, and when the pressure in the inside 11e of the cooking container 11 rises, the bellows-like member constituting the pressure receiving part 32 extends, The top of the pressure receiving portion 32 is raised along the inner wall of the guide hole 21b. Moreover, the heating cooker 1 seems that the opening area of the steam discharge port 21a increases gradually according to the displacement (movement along the inner wall of the guide hole 21b) of the pressure receiving part 32 in the pressure reduction process of the inside 11e of the cooking vessel 11. A link mechanism 33 for displacing the steam discharge valve 31 (moving up and down in FIG. 2) is provided. Generally, the decompression process of the inside 11e of the cooking container 11 is after the heating process for cooking is completed, and before the user opens the inner lid 21 (usually, the inner lid 21 is opened together with the outer lid 24 described later). To be done. Moreover, as for the steam discharge valve 31, it is desirable that it is a needle valve which becomes thin toward the front-end | tip, for example. The lid according to the present invention includes an inner lid 21 as a lid body, a pressure receiving portion 32, and a steam discharge valve 31 as a valve body.

  Moreover, the heating cooker 1 can further be equipped with the structure demonstrated below. As shown in FIGS. 1 and 2, the heating cooker 1 includes an apparatus main body 12 and a container cover 13 fixed in the apparatus main body 12. The cooking container 11 is detachably accommodated in the container cover 13. Moreover, the heating cooker 1 may be provided with the heating coil 14 as a heating part for heating arrange | positioned on the outer side of the container cover 13. FIG. The heating coil 14 is turned in a spiral shape, for example, and a high frequency current is supplied to the heating coil 14. The cooking vessel 11 generates heat due to an induced current generated by electromagnetic induction by the heating coil 14.

  The heating cooker 1 includes a pan bottom temperature sensor 15 provided through a hole 13 a formed at the center position of the bottom of the container cover 13, a compression spring 16 that pushes up the bottom surface of the pan bottom temperature sensor 15, and the apparatus main body 12. And an operation display unit 17 provided on the outer wall. Moreover, it is desirable that a handle portion 11 c be provided outside the side wall of the cooking container 11. In addition, the container cover 13 is desirably formed so as to have a gap that allows fingers to enter between the cooking container 11 and the container cover 13. Furthermore, the cooking vessel 11 may have a flange 11b at the upper edge thereof. The flange 11b is provided with, for example, a plurality of notches. However, the shape and arrangement of the apparatus main body 12, the container cover 13, the heating coil 14, and the cooking container 11 and the heating method of the heating coil 14 are not limited to the above example. The present invention can also be applied to an apparatus (for example, a pressure cooker) that does not include a heating unit (for example, the heating coil 14). In this case, the cooking container 11 is heated by a heating device different from the heating cooker 1. Furthermore, this invention is applicable also to the cover body (inner cover) of a pressure cooker (pressure cooker).

  Moreover, it is desirable that a peripheral portion of the inner lid 21 of the cooking device 1 is provided with a lid packing 22 as an annular sealing material, for example. With the lid packing 22, the airtightness between the flange 11 b and the inner surface 11 d of the side wall of the cooking container 11 and the inner lid 21 can be enhanced. Moreover, it is desirable that the heating cooker 1 is provided with a lock ring 23 so as to sandwich the inner lid 21 and the flange 11b of the cooking vessel 11. The user engages the notch (not shown) of the flange 11b of the cooking container 11 with the lock ring 23 by performing an operation for rotating the lock ring 23 in the circumferential direction of the flange 11b. 23 can be fixed to the flange 11b. By fixing the lock ring 23, the opening 11 a of the cooking container 11 is firmly sealed by the inner lid 21. However, the mechanism for tightly sealing the opening 11 a of the cooking container 11 with the inner lid 21 may be a mechanism other than the combination of the flange 11 b and the lock ring 23.

  In the example shown in FIGS. 1 and 2, the heating cooker 1 includes an outer lid 24 that covers the inner lid 21 and the lock ring 23 and is engaged with the apparatus main body 12 so as to be freely opened and closed. The outer lid 24 has an external steam port 24 a as a through hole penetrating the outer lid 24. Therefore, the inside 11e of the cooking vessel 11 communicates with the outside (atmospheric space) via the steam outlet 21a or the pressure regulating steam port 21c, which is a communication hole formed in the inner lid 21, and the external steam port 24a. be able to.

  A weight 35 is provided on the pressure regulating steam port 21c so as to close the pressure regulating steam port 21c. The weight 35 is, for example, a sphere, but the shape of the weight 35 is not limited to a sphere as long as the shape of the weight 35 can close the opening of the pressure regulating steam port 21c. It is desirable that packing be provided between the steam discharge port 21a and the steam discharge valve 31 and between the pressure-regulating steam port 21c and the weight 35 in order to enhance the sealing performance. Generally, adjustment of the pressure of the inside 11e of the cooking container 11 by discharge | emission of the steam from the pressure regulation steam port 21c is performed in the heating process for cooking, and discharge | emission of the steam from the steam discharge port 21a is performed after a heating process. Performed in a vacuum process.

  Moreover, in the example shown by FIG.1 and FIG.2, the cooking-by-heating machine 1 is the locked state which is the state which made the steam exhaust valve 31 with which the steam exhaust port 21a was equipped closed in a closed state, or a steam exhaust valve A decompression start unit 34 is provided as a switching unit for switching to any one of the unlocked states in which 31 is movable. In the locked state, as shown in FIG. 1, the contact member 34a of the decompression start portion 34 formed of a solenoid or the like contacts the top of the steam discharge valve 31, pushes down the steam discharge valve 31, and the steam discharge valve 31 closes the steam outlet 21a. In the unlocked state, as shown in FIG. 2, the contact member 34 a of the pressure reducing start portion 34 is separated from the top of the steam discharge valve 31 and does not limit the displacement of the steam discharge valve 31.

  The link mechanism 33 displaces the steam discharge valve 31 so that the opening area of the steam discharge port 21a gradually increases according to the displacement of the pressure receiving portion 32 accompanying the decrease in the pressure inside the cooking vessel 11. The link mechanism 33 gradually increases the opening area of the steam discharge port 21a according to the displacement of the pressure receiving part 32 in the pressure reducing process (during the pressure reducing period) of the inside 11e of the cooking vessel 11. In the example shown in FIGS. 1 and 2, the link mechanism 33 has a link portion (rod-like member) 33 b that swings about a support shaft (fulcrum) 33 a provided in the inner lid 21, and the link portion 33 b The first end portion (operation point) connected to the steam discharge valve 31 and the second end portion (power point) connected to the pressure receiving portion 32 are provided. However, the structure of the link mechanism 33 is not limited to the example shown by FIG.1 and FIG.2.

  The outer lid 24 may be provided with a lid temperature sensor 36 as a detection unit for detecting the temperature in the cooking container 11. The through hole 21d of the inner lid 21 and the lid temperature sensor 36 can improve the hermeticity of the inside 11e of the cooking container 11 by providing a packing on the outer periphery of the lid temperature sensor 36, for example. The lid temperature sensor 36 can detect the temperature of an object to be heated (foodstuff, water, etc.) in the interior 11 e of the cooking vessel 11 through the through hole 21 d of the inner lid 21.

<< 1-2 >> Operation FIG. 3 is a diagram schematically illustrating an example of a configuration of a control system of the heating cooker 1. 4A and 4B are explanatory views schematically showing an example of operations of the steam discharge valve 31, the pressure receiving unit 32, and the link mechanism 33 of the heating cooker 1. FIG. FIGS. 5A to 5D are timing charts showing an example of the steam discharge operation in the decompression process of the heating cooker 1. 4 (a) and 4 (b) show the operation of the steam discharge valve 31 in the unlocked state shown in FIG. 2, and therefore the configuration shown in FIG. 2 in FIGS. 4 (a) and 4 (b). Components corresponding to the elements are denoted by the same reference numerals as those shown in FIG. 4 (a) and 4 (b) show a coil spring 37 as an elastic member that applies a force in the direction of pushing up the steam discharge valve 31 to the steam discharge valve 31, as a configuration not shown in FIG. ing. The coil spring 37 has an arbitrary configuration. When the pressure receiving portion 32 is lowered by its own weight when the inside 11e of the cooking container 11 is at atmospheric pressure, the coil spring 37 does not need to be provided.

  When cooking is started by the heating cooker 1, the user puts an object to be heated such as food and water in the cooking container 11, places the cooking container 11 in the container cover 13, and then puts the outer lid 24. Close. When the outer lid 24 is closed, the lid packing 22 of the inner lid 21 is pressed against the flange 11b of the cooking container 11 and the inner surface of the cooking container 11, and the space inside the cooking container 11 is sealed. Further, when using the lock ring 23, the user may perform an operation for rotating the lock ring 23 to fix the inner lid 21 to the flange 11 b of the cooking container 11. For example, when the user turns on the cooking start switch of the operation display unit 17, the heating cooker 1 starts the heating process of the cooking container 11.

  After the start of the heating process, for example, the contact member 34a of the decompression start part 34 pushes down the top of the steam discharge valve 31, as shown in FIG. 1, and the steam discharge valve 31 is locked. A high-frequency current is supplied to the heating coil 14 from the inverter unit 42, a high-frequency magnetic field is generated, and the surface facing the heating coil 14 of the cooking vessel 11 magnetically coupled to the heating coil 14 is excited, and the bottom surface of the cooking vessel 11 is excited. Eddy currents are induced. Joule heat is generated by the eddy current and the resistance of the cooking vessel 11, the bottom surface of the cooking vessel 11 generates heat, and the object to be heated inside the cooking vessel 11 is heated. When boiling begins to occur in the interior 11e of the cooking container 11, the steam discharge valve 31 is locked at the decompression start portion 34, and the cooking container 11 is covered by the weight 35 that closes the pressure-regulating steam port 21c with its own weight. The steam is prevented from being discharged from the inside 11e, and the pressure inside the cooking container 11 rises. The upper limit value of the pressure in the interior 11e of the cooking vessel 11 is set by the opening area of the pressure regulating steam port 21c and the weight of the weight 35 that closes the pressure regulating steam port 21c. For example, if the diameter φ of the pressure adjusting steam port 21c is 1 mm and the weight 35 has a weight of 10 g, the upper limit value of the pressure inside the cooking vessel 11 is about 2.2 atmospheres (abs). When the pressure in the interior 11e of the cooking container 11 reaches the set upper limit value, the steam in the interior 11e of the cooking container 11 pushes up the weight 35, and the steam is discharged through the pressure-regulating steam port 21c and the external steam port 24a. . For this reason, the pressure of the inside 11e of the cooking container 11 is kept substantially constant in the vicinity of the upper limit value of the pressure of the inside 11e of the cooking container 11.

  Thereafter, the heating process ends. Immediately after the end of the heating process, the pressure in the interior 11e of the cooking vessel 11 is maintained in a state higher than atmospheric pressure. If the outer lid 24 and the inner lid 21 are opened in this state, there is a possibility that bumping occurs due to a pressure change (rapid decrease), and the food in the inside 11e of the cooking container 11 may jump out. For this reason, it is desirable to open the outer lid 24 after a decompression process for reducing the pressure inside the cooking container 11 to the atmospheric pressure. However, in the decompression process, if the steam outlet 21a is fully opened (the opening area is maximized) at once, bumping may occur due to the pressure in the inside 11e of the cooking vessel 11, and the momentum of the discharged steam , The user may feel uncomfortable (for example, surprise or fear). Further, in the decompression process, if the opening area of the steam discharge port 21a is too small, the pressure of the discharged steam is weak, but the decompression cannot be performed in a short time (rapidly). Therefore, in the decompression process of the heating cooker 1, a mechanism is adopted in which the pressure inside the cooking container 11 is quickly reduced to atmospheric pressure while suppressing the momentum of the released steam. Specifically, in the cooking device 1, in the decompression process after the heating process, when the pressure inside the cooking vessel 11 is high, the opening area of the steam discharge port 21a is made small, and the inside 11e inside the cooking vessel 11 is made. A link mechanism 33 that gradually increases the opening area of the steam discharge port 21a in accordance with a decrease in pressure is employed.

  Next, the steam discharge operation in the decompression process will be described with reference to FIGS. 4 (a) and 4 (b) and FIGS. 5 (a) to 5 (d). When the pressure receiving part 32 is displaced by the pressure of the inside 11e of the cooking vessel 11, the pressure receiving operation part 32a connected to the pressure receiving part 32 pushes up the second end of the link part 33b, and the steam discharge valve 31 and the pressure receiving operation part 32a are Then, the link portion 33b is swung around the support shaft 33a (counterclockwise in FIGS. 4A and 4B). FIG. 4A shows a state where the steam discharge valve 31 is opened and the pressure inside the cooking container 11 is atmospheric pressure, and FIG. 4B shows the state where the steam discharge valve 31 closes the steam discharge port 21a. In this way, the pressure in the inside 11e of the cooking container 11 is increased by the pressure reduction start unit 34.

  The decompression start unit 34 presses the steam discharge valve 31 downward and closes the steam discharge port 21a by closing the steam discharge port 21a, thereby bringing the cooking vessel 11 into a sealed state. By performing the heating process in this state, the space in the interior 11e of the cooking container 11 is filled with steam, the pressure in the interior 11e of the cooking container 11 increases, and the pressure receiving portion 32 increases as the pressure in the interior 11e of the cooking container 11 increases. The pressure is applied to the pressure receiving portion 32, and an upward force in FIGS. 4 (a) and 4 (b) is applied. When the decompression start section 34 is operated and the force for pressing the steam discharge valve 31 downward is released as shown in FIG. 2, steam pressure is increased by the pressure inside the cooking container 11 and the upward force by the coil spring 37. The discharge valve 31 moves to a preset position (for example, the position of the opening area A1 in FIG. 5B).

At this time, if the steam discharge valve 31 is configured to be just closed in a state where the pressure receiving portion 32 is raised at a preset upper limit value of the pressure inside the cooking vessel 11 (that is, the pressure receiving unit 32 is set to be closed) (that is, When the opening area A1 shown in FIG. 5B is configured to be zero), even when the decompression start unit 34 is driven and the steam discharge valve 31 is in the unlocked state, the inside 11e of the cooking container 11 The state where the steam discharge valve 31 is closed by the pressure is maintained. Then, the steam discharge valve 31 does not move until it is allowed to cool and the pressure in the interior 11e of the cooking vessel 11 decreases, and the time required for decompression becomes longer. Therefore, the steam discharge valve 31 that has been unlocked by the decompression start unit 34 has an opening area of the steam discharge port 21a (for example, an opening area A1 in FIG. 5B) about immediately after the unlocking state. It is desirable to set the position so that it is displaced to a position of ² mm ² or less and exhaust is started. 2 mm ² or less is the opening area of the steam outlet 21a that does not give the user discomfort (for example, surprise or fear) when the pressure of the inside 11e of the cooking vessel 11 becomes 2.2 atmospheres (abs). is there.

  Immediately after the steam discharge valve 31 is moved and the steam discharge port 21a is opened, the pressure receiving part 32 is kept in a state of being lifted by an upward force, and the steam discharge valve 31 connected by the link mechanism 33 is used. The opening area of the steam discharge port 21a is set so as not to exceed a predetermined upper limit value. As the steam is discharged from the steam discharge port 21a and the pressure inside the cooking container 11 decreases, the force to raise the pressure receiving portion 32 is weakened, and the pressure receiving portion 32 gradually falls. When the pressure receiving portion 32 is lowered, the pressure receiving operation portion 32a is also lowered simultaneously, and the steam discharge valve 31 is gradually raised. Since the steam discharge valve 31 has a needle shape with a thin tip, and the steam discharge port 21a has a cylindrical shape, the opening area of the steam discharge port 21a gradually increases as the steam discharge valve 31 rises.

  FIG. 5 (a) shows that the locked state of the steam discharge valve 31 by the decompression start unit 34 is released at time t0, and the unlocked state is obtained after time t0. FIG. 5B shows an example of a change in the opening area of the steam outlet 21a in the decompression process from time t0 to time t1. FIG.5 (c) has shown an example of the change of the pressure of the inside 11e of the cooking vessel 11 in a pressure reduction process. FIG. 5D shows an example of the momentum (steam discharge rate) of the steam discharged in the decompression process. As shown in FIGS. 5 (a) to 5 (d), when the steam discharge valve 31 locked by the decompression start unit 34 is turned off (unlocked), the steam discharge port 21a is opened, The set opening area A1 is obtained. Along with this, steam is released from the inside 11e of the cooking container 11, the pressure inside the cooking container 11 gradually decreases, and the pressure receiving portion 32 is displaced (down) as the pressure inside the cooking container 11 decreases 11e. Thus, the opening area of the steam discharge port 21a gradually increases. At this time, as shown in FIG. 5 (d), the steam exhaust valve 31 and the pressure receiving part 32 are set so that the steam momentum B1 to be released becomes a substantially constant value close to the upper limit momentum allowed by the user. Then, the pressure can be reduced most rapidly. That is, the period (t1-t0) of the decompression process can be shortened.

  The pressure receiving part 32 maintains the sealing of the cooking container 11 while transmitting the pressure of the inside 11e of the cooking container 11 to the pressure receiving operation part 32a. In FIG.1 and FIG.2, the case where the pressure receiving part 32 is comprised with the bellows-like member is shown. If the pressure receiving part 32 uses a bellows-like member, the pressure-receiving operation part 32a can be installed in the pressure state of the inside 11e of the cooking vessel 11 while being sealed by installing the bellows-like member attached to the inner lid 21. It can be displaced.

  In addition, when the steam discharge valve 31 is needle-shaped, in order to keep the steam discharge speed at a constant momentum and realize quick decompression, is the taper angle of the steam discharge valve 31 a combination of two or more patterns? Alternatively, it is desirable that the taper angle of the steam discharge valve 31 is continuously optimized in a curved shape. As described above, the pressure receiving portion 32 that is displaced according to the pressure of the inside 11e of the cooking vessel 11 and the steam discharge valve 31 that is linked to the pressure receiving portion 32 are configured to be displaced. Without considering the difference in the amount of steam depending on the amount, the optimum opening area of the steam port can be achieved according to the pressure change in the interior 11e of the cooking vessel 11. For this reason, the heating cooker 1 is excellent in robustness and is not easily affected by external factors.

<< 1-3 >> Modifications In the above description, the case where the pressure receiving portion 32 and the steam discharge valve 31 are displaced in the vertical direction is illustrated, but the direction of the displacement is not limited to the vertical direction, and the inside of the cooking container 11 inside 11e. A structure that is displaced in the horizontal direction (lateral direction in FIG. 1) or other directions may be used as long as the displacement uses pressure.

  In the above description, the weight 35 that blocks the pressure-regulating steam port 21c is spherical. However, the shape of the weight 35 is not limited to this, and steam is generated when the pressure in the interior 11e of the cooking container 11 exceeds a certain level by a spring or the like. Other mechanisms such as a mechanism including a valve body and a spring that presses the valve body toward the pressure-regulating steam port 21c instead of the weight 35 may be used as long as the escape mechanism.

  In the above description, the depressurization start unit 34 has been configured to move the contact member 34a with a solenoid. However, the depressurization start unit 34 sets the steam discharge port 21a to the unlocked state when the energization is off, and the energization is on. It is desirable to set so that the discharge port 21a is locked. In this case, when a power failure occurs while the pressure inside the cooking vessel 11 is high, the steam outlet 21a is opened, and the steam is gradually released to lower the inside 11e inside the cooking vessel 11 to atmospheric pressure. Can increase safety.

  In the above description, the structure in which the steam discharge port 21a and the pressure-regulating steam port 21c are provided separately has been described. However, the pressure of the interior 11e of the cooking vessel 11 exceeds the set value with the steam discharge valve 31 that closes the steam discharge port 21a. It is not necessary to provide the pressure-regulating steam port 21c and the weight 35 if they are configured to be released when they are released. For example, a spring that bends (shrinks) by receiving a force equal to or greater than a set value may be provided between the steam discharge valve 31 and the contact member 34a of the pressure reducing start portion 34. In this case, when the inside 11e of the cooking container 11 becomes equal to or higher than the predetermined set pressure, the steam discharge valve 31 moves to release the steam in the inside 11e of the cooking container 11, and the inside 11e of the cooking container 11 Should be kept at a constant pressure. An example of such a mechanism will be described as a second embodiment.

  Further, the shape of the steam discharge valve 31 is not limited to the needle shape, and may be other shapes as long as the opening area of the steam discharge port can be gradually changed.

<< 1-4 >> Effect As described above, according to the heating cooker 1 according to the first embodiment, the inside 11e of the cooking container 11 is decompressed in a short time without causing discomfort to the user. Can do.

  In addition, since the steam is gradually discharged at a substantially constant moment in the decompression process, it is difficult to cause bumping in which the contents are ejected to the outside due to a sudden pressure change, so that the steam itself or food material is not ejected.

  Further, the steam discharge valve has a simple structure (a structure that swings around the support shaft 33a) so that the opening area of the steam discharge port 21a gradually increases according to the displacement of the pressure receiving portion 32 as the pressure decreases. Since the link mechanism 33 for displacing 31 can be configured, an increase in product cost can be suppressed.

  In addition, as the depressurization start unit 34 that is a switching unit that switches between the locked state in which the steam discharge valve 31 is in a non-movable state and the unlocked state in which the steam discharge valve 31 is in a movable state while the steam discharge port 21a is closed. Since a simple structure such as a solenoid can be employed, an increase in product cost can be suppressed.

  In addition, since the solenoid and the steam discharge valve 31 are unlocked when the power is turned off, the interior 11e of the cooking container 11 can be quickly decompressed when a power failure occurs, and the safety of the user can be ensured.

<< 2 >> Embodiment 2
<< 2-1 >> Configuration In the first embodiment, a pressure adjusting unit (pressure adjusting steam port 21c and weight 35) for adjusting the pressure in the interior 11e of the cooking container 11 in the heating process, and the cooking container 11 in the pressure reducing process. The case where the decompression part (steam exhaust port 21a and the steam exhaust valve 31) for decompressing the pressure of the inside 11e of the inside of this was made into the separate structure was mainly demonstrated. On the other hand, in the second embodiment, a pressure adjusting unit for adjusting the pressure of the inside 11e of the cooking container 11 in the heating process, and a pressure reducing unit for reducing the pressure of the inside 11e of the cooking container 11 in the decompression process. And a common structure (steam discharge part). Except for this point, the second embodiment is the same as the first embodiment. Therefore, in the description of the second embodiment, FIG. 1 is also partially referred to (for the structure other than the steam discharge unit). In the description of the second embodiment, the difference from the first embodiment will be mainly described.

  FIG. 6 schematically shows the structure of the steam discharge section provided in the lid 50 of the heating cooker 2 according to Embodiment 2 of the present invention (when the pressure in the interior 11e of the cooking vessel 11 is equal to the atmospheric pressure). It is a longitudinal cross-sectional view shown. FIGS. 7A and 7B are longitudinal sectional views schematically showing the pressure adjusting operation in the heating process of the steam discharge section provided in the heating cooker 2. FIGS. 8A and 8B are longitudinal sectional views schematically showing the operation in the decompression process of the steam discharge unit provided in the cooking device 2.

  As shown in FIG. 6, the heating cooker 2 includes a cooking container 11 (shown in FIG. 1) and a pressure adjusting port (communication hole) that communicates the inside 11 e and the outside of the cooking container 11 as main components. ) 50a and an inner lid 50 serving as a lid for closing the opening (11a in FIG. 1) of the cooking container 11. The heating cooker 2 is provided movably (slidable in the vertical direction in FIG. 6) at the pressure adjusting port 50a of the inner lid 50, and is displaced (moved) in accordance with the pressure inside the cooking container 11 to cook. A movable pressure receiving member 51 is provided as a pressure receiving portion having a movable steam port (steam discharge port) 51a for communicating the inside 11e of the container 11 with the outside. The heating cooker 2 is provided with a steam discharge valve 52 as a valve body that is movably provided with respect to the inner lid 50 and adjusts the opening area of a movable steam port 51a that is a steam discharge port. The steam discharge valve 52 is movable along a hole 53a provided in the lock portion 53, and receives a downward biasing force in FIG. 6 by a pressure regulating spring 54 as a pressure regulating member. Further, the lock portion 53 receives an upward biasing force in FIG. 6 by the large-diameter biasing spring 58. Further, the inner lid 50 has a restricting portion 55 that restricts the moving range of the movable pressure receiving member 51. The space 59 is an atmospheric space.

  In the example of FIG. 6, the movable pressure receiving member 51 is formed of a cylindrical movable member that is displaced (moves in the vertical direction in FIG. 6) within the pressure adjusting port 50 a formed in the inner lid 50. The heating cooker 2 displaces the steam discharge valve 52 so that the opening area of the movable steam port 51a gradually increases according to the displacement of the movable pressure receiving member 51 in the decompression process of the inside 11e of the cooking container 11 (FIG. 6). In the vertical direction).

  The movable pressure receiving member 51 rises upward in FIG. 6 as the pressure inside the cooking container 11 increases, and is shown in FIGS. 7 (a) and 7 (b) and FIGS. 8 (a) and 8 (b). It will be in a state like that. The steam discharge valve 52 is configured to rise while closing the movable steam port 51a as the movable steam port 51a of the movable pressure receiving member 51 rises. The steam discharge valve 52 is, for example, a needle valve that narrows toward the inside 11 e of the cooking vessel 11. The opening area of the steam discharge port 51a is changed depending on the positional relationship between the steam discharge valve 52 and the movable steam port 51a. The operation stroke of the steam discharge valve 52 is regulated by a lock portion 53 locked (moving restricted) by a contact member 34a of a pressure reduction start portion (34 in FIG. 1) and a pressure regulating spring 54 as a pressure regulating member. The stroke of the movable steam port 51a is determined by the restricting portion 55. The pressure regulating spring 54 may be a member other than the pressure regulating spring shown in FIG. 6 as long as it is a member that applies a preset pressure (downward biasing force in FIG. 6) to the steam discharge valve 52.

<< 2-2 >> Operation FIG. 7A shows that the pressure in the interior 11e of the cooking vessel 11 rises from the atmospheric pressure in the heating process, and the movable pressure receiving pressure remains while the movable steam port 51a is closed by the steam discharge valve 52. The state which the member 51 raised is shown. In FIG. 7B, the pressure in the interior 11e of the cooking container 11 further rises compared to the state of FIG. 7A, and the steam discharge valve 52 rises against the downward biasing force of the pressure regulating member 54. The state (arrow C1) which discharges | emits the vapor | steam of the inside 11e of the cooking container 11 is shown. At this time, since the movable pressure receiving member 51 is in contact with the restricting portion 55, a gap can be formed between the inner wall of the movable steam port 51 a and the steam discharge valve 52. When the gap is formed, the steam in the inside 11e of the cooking container 11 is released to the space 59 through the gap, and the inside 11e of the cooking container 11 is generally maintained at the set pressure.

FIG. 8A shows a case where the pressure inside the cooking container 11 is in a high pressure state in the decompression process, and FIG. 8B shows the pressure inside the cooking container 11 inside the cooking container 11 shown in FIG. ) Is a state that is lower than that at the time (a state higher than atmospheric pressure). 8A and 8B show a case where the lock unit 53 is unlocked by the operation of the decompression start unit 34 (shown in FIG. 1). As the lock portion 53 moves upward, the steam discharge valve 52 slightly rises together with the pressure regulating member 54 and starts a pressure reduction process by steam discharge. The opening area of the steam outlet 51a at the start of the decompression process by the decompression start unit 34 is 2 mm ² or less, which is an area that can sufficiently suppress the momentum of the steams D1 and D2, as described in the first embodiment. It is desirable that When the discharge of the steam is started, the steam discharge valve 52 keeps the state of rising due to the steam pressure in the interior 11e of the cooking vessel 11, as shown in FIGS. 8 (a) and 8 (b). As shown in FIG. 4, the movable pressure adjusting member 51 having the movable steam port 51a is set so as to gradually fall as the pressure inside the cooking container 11 decreases. As the distance between the needle-like steam discharge valve 52 and the movable steam port 51a increases, the opening area of the movable steam port 51a increases and the momentum of the steams D1 and D2 falls within the allowable range of the user, while the cooking container 11 The inside 11e can be quickly depressurized.

<< 2-3 >> Modification FIG. 9 is a partially cutaway perspective view schematically showing the structure of the steam discharge section of the heating cooker 2a according to a modification of the second embodiment. 10 (a) and 10 (b) are a side view and a cross-sectional view showing the operation of the steam discharge section of the heating cooker 2a shown in FIG. In the above description, as shown in FIG. 8 (a), the case where the steam discharge valve 52 is kept at the most elevated position immediately after the start of the decompression process has been described, but FIG. 9, FIG. 10 (a) and (b) ), A cam hole 50b that is inclined with respect to the horizontal direction is formed in the lid body 50, and a cam portion 56 that is a convex portion that engages with the cam hole 50b is provided in the lock portion 53 to start the decompression process. At the same time, the lock unit 53 may be rotated. In this case, the convex portion 57 provided on the steam discharge valve 52 rotated together with the lock portion 53 rides on the riding portion 50c of the inner lid 50 at the raised position. With such a configuration, the operation (position) of the steam discharge valve 52 in the decompression process can be stabilized. Thereafter, when the lock portion 53 is pushed downward from above, the lock portion 53 and the steam discharge valve 52 are engaged by the engagement between the cam portion 56 and the cam hole 50b, so that the convex portion 57 and the ride-on portion 50c of the steam discharge valve 52 are rotated. And the steam discharge valve 52 can be returned to be movable up and down.

  In the above description, the case where the steam discharge valve 52 and the movable pressure regulating member 51 are moved up and down has been described. However, the operation direction is not limited to the vertical movement.

  Moreover, the shape of the steam discharge valve 52 is not limited to a needle shape, and may be other shapes as long as the opening area of the steam discharge port can be gradually changed.

<< 2-4 >> Effect As explained above, according to the heating cookers 2 and 2a, the same effect as the effect demonstrated in the said Embodiment 1 can be acquired.

  Moreover, according to the heating cookers 2 and 2a, since the pressure adjustment in the heating process and the pressure reduction in the pressure reduction process can be performed by a common mechanism, the pressure adjustment and pressure reduction are performed with a small occupied area on the inner lid 50. Can be arranged.

1, 2 and 2a cooking device, 11 cooking container, 11a opening, 11b flange, 11c handle, 11d inner surface, 11e inside, 12 device body, 13 container cover, 14 heating coil, 15 pan bottom temperature sensor (temperature sensor) , 16 compression spring, 17 operation display section, 21 inner lid (lid body), 21a steam discharge port (communication hole), 21b guide hole, 21c pressure regulating steam port (communication hole), 22 lid packing, 23 lock ring, 24 Outer lid, 24a External steam port, 31 Steam exhaust valve (valve element), 32 Pressure receiving part, 32a Pressure receiving operation part, 33 Link mechanism, 33a Support shaft (fulcrum), 33b Link part, 34 Decompression start part, 34a Contact member , 35 weights, 36 lid temperature sensor (temperature sensor), 37 elastic member (coil spring), 41 control unit, 42 inverter unit, 50 inner lid (lid body) 50a Pressure adjusting port (communication hole), 50b Cam hole, 50c Riding part, 51 Movable pressure receiving member (pressure adjusting part), 51a Movable steam port (steam outlet), 52 Steam exhaust valve, 53 Lock part, 54 Pressure spring (pressure adjusting member), 55 regulating portion, 56 cam portion, 57 convex portion, 58 biasing spring, 59 atmospheric space.

Claims (14)

A cooking container having an opening;
A lid that closes the opening;
A pressure receiving portion that is movably provided on the lid and is displaced according to the pressure inside the cooking vessel;
A valve body movably provided for the lid;
With
A steam outlet for communicating the inside and the outside of the cooking container is provided in either the lid or the pressure receiving part,
The opening area of the steam outlet is adjusted by the valve body,
The cooking device according to claim 1, wherein the opening area gradually increases in accordance with the displacement of the pressure receiving portion during the decompression process inside the cooking vessel.   The cooking device according to claim 1, wherein the steam outlet is a communication hole formed in the lid.   The link mechanism according to claim 1, further comprising a link mechanism that displaces the valve body so that the opening area of the steam outlet gradually increases in accordance with the displacement of the pressure receiving portion accompanying the decrease in the pressure. 2. The heating cooker according to 2. The link mechanism has a link portion that swings around a support shaft provided in the lid,
The cooking device according to claim 3, wherein the link portion includes a first end portion connected to the valve body and a second end portion connected to the pressure receiving portion.   It further includes a switching unit that switches the valve body to either a locked state in which the valve body is in a non-movable state or an unlocked state in which the valve body is in a movable state while the steam discharge port is closed. The cooking device according to any one of claims 1 to 4. The lid body is provided with a pressure-regulating steam port for communicating the inside and the outside of the cooking container,
The cooking device according to any one of claims 1 to 5, wherein the cooking device further includes a weight that closes the pressure-regulating steam port. The pressure receiving portion is a movable pressure receiving member provided movably along a pressure adjusting port provided in the lid,
The cooking device according to claim 1, wherein the steam discharge port is a communication hole formed in the movable pressure receiving member.   The cooking device according to claim 7, further comprising a pressure adjusting member that applies a pressing force toward the steam discharge port to the valve body.   The stroke of displacement of the valve body is limited to a first stroke required for regulating the pressure inside the cooking vessel, or the stroke of displacement of the valve body is reduced by reducing the pressure inside the cooking vessel. The cooking device according to claim 7 or 8, further comprising a switching unit that switches the valve body to any one of unlocked states in which the stroke is longer than the first stroke required for the process. A lock portion for restricting movement of the valve body;
The lid body has a cam hole formed facing the outer wall of the lock portion,
The cooking device according to any one of claims 7 to 9, wherein the lock portion includes a cam portion that engages with the cam hole.   The heating cooker according to any one of claims 1 to 10, further comprising a heating unit that heats the cooking container.   The cooking device according to any one of claims 1 to 11, wherein the valve body has a tapered portion that narrows toward the inside of the cooking container.   The cooking device according to claim 5, wherein the switching unit switches to an unlocked state when energization is turned off. A lid for closing the opening of the cooking container having an opening;
A pressure receiving portion that is movably provided on the lid and is displaced according to the pressure inside the cooking vessel;
A valve body movably provided for the lid;
With
A steam outlet for communicating the inside and the outside of the cooking container is provided in either the lid or the pressure receiving part,
The opening area of the steam outlet is adjusted by the valve body,
The lid characterized in that the opening area gradually increases according to the displacement of the pressure receiving part during the pressure reducing process inside the cooking vessel.

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