WO2018207382A1 - Vapor generation device and heating cooker - Google Patents

Abstract

This vapor generation device (100) is provided with: an outer cylinder part (101); a heater (3) disposed inside the outer cylinder part (101); a water supply pipe (104) that communicates with the inside of the outer cylinder part (101); and a vapor discharge pipe (105) that is connected to one axial end portion (101b) of the outer cylinder part (101), and communicates with the inside of the outer cylinder part (101). A flow path (110), which spirally extends from the other axial end portion (101a) side of the outer cylinder part (101) toward the one axial end portion (101b) side of the outer cylinder part (101), is provided on the periphery of the heater (3).

Description

Steam generator and cooking device Supporting statement

This application claims the benefit of priority with respect to Japanese Patent Application No. 2017-096041 filed on May 12, 2017, and incorporates all the descriptions in the Japanese application. Is.

This invention relates to a steam generator and a heating cooker.

Conventionally, as a steam generator, there is one in which a spiral heater and a spiral heating tube are embedded in a die cast (see, for example, JP-A-2015-26565 (Patent Document 1)). Each part of the heating tube is arranged between adjacent parts in the heater in the axial direction. In other words, the heating tube overlaps the heater so that a part of the heating tube and a part of the heater are adjacent to each other in the axial direction.

According to the steam generator configured as described above, water is introduced into the heating tube from one end of the heating tube, and power is supplied to the heater. Thereby, since the heat of a heater is transmitted to a heating pipe via die-casting, the water in a heating pipe can be evaporated and saturated steam can be generated. At this time, by adjusting the power to the heater, the saturated steam in the heating pipe can be further heated to generate superheated steam. Therefore, saturated steam or superheated steam can be emitted from the other end of the heating tube.

JP 2015-26565 A

However, in the conventional steam generator, since a part of the heater is disposed between the adjacent portions in the heating tube in the axial direction, the distance between the adjacent portions in the heating tube in the axial direction cannot be shortened.

Therefore, the conventional steam generator has a problem that there is still room for downsizing.

Therefore, an object of the present invention is to provide a steam generator that can be miniaturized.

The steam generator according to one aspect of the present invention is
An outer cylinder,
A heater disposed in the outer cylindrical portion;
A water supply pipe connected to one axial end of the outer cylindrical portion and communicating with the inside of the outer cylindrical portion;
A steam discharge pipe connected to the other end portion in the axial direction of the outer cylinder portion and communicating with the inside of the outer cylinder portion;
A flow path is provided around the heater so as to draw a spiral from the one end side in the axial direction of the outer cylindrical portion toward the other end portion in the axial direction of the outer cylindrical portion. Yes.

According to the present invention, it is possible to provide a steam generator that can be miniaturized.

It is an external appearance perspective view of the heating cooker of 1st Embodiment of this invention. It is a control block diagram of the heating cooker. It is a model perspective view of the steam generator of the said 1st Embodiment. It is a model perspective view of the other state of the said steam generator. It is a schematic sectional drawing of the steam generator of 2nd Embodiment of this invention. It is a schematic sectional drawing of the steam generator of 3rd Embodiment of this invention.

Hereinafter, the steam generator of the present invention will be described in detail with reference to the illustrated embodiments. In the drawings, the same reference numerals represent the same or corresponding parts. In addition, dimensions on the drawing such as length, width, thickness, and depth are appropriately changed from actual scales for clarity and simplification of the drawings, and do not represent actual relative dimensions.

[First Embodiment]
FIG. 1 is an external perspective view of a heating cooker according to the first embodiment of the present invention.

The heating cooker includes a rectangular parallelepiped main body casing 1, a heating chamber 2 provided in the main body casing 1 and having an opening 2a on the front side, and a door 3 for opening and closing the opening 2a of the heating chamber 2. ing.

An exhaust duct 5 is provided on the upper side and rear side of the main casing 1. A dew receptacle 6 is detachably attached to the lower left portion of the front surface of the main casing 1. On the other hand, a water supply tank 14 is detachably attached to the lower right portion of the front surface of the main casing 1.

The water supply tank 14 stores water to be sent to the steam generator 100 described later. When the water in the water supply tank 14 decreases, the user removes the water supply tank 14 from the main body casing 1 and replenishes the water supply tank 14 with water.

The door 3 is attached to the front side of the main casing 1 so as to be rotatable about the lower side. A transparent outer glass 7 having heat resistance is provided on the front surface of the door 3 (the surface opposite to the heating chamber 2). Further, the door 3 includes a handle 8 positioned on the upper side of the outer glass 7 and an operation panel 9 provided on the right side of the outer glass 7.

The operation panel 9 includes a color liquid crystal display unit 10, a “talking” key 11, a “cancel” key 12 that is pressed when heating is stopped halfway, and a “hot start” key 13 that is pressed when heating is started. Contains.

FIG. 2 is a control block diagram of the heating cooker.

The cooking device includes a control device 20 including a microcomputer and an input / output circuit. The control device 20 is connected to the operation panel 9, the heater 21, the magnetron 22, the humidity sensor 23, the internal temperature sensor 24, the door sensor 25, the microphone 26, the speaker 27, the water supply pump 28, the steam generator 100, and the like. The control device 20 also controls the color liquid crystal display unit 10, the heater 21, the magnetron 22, and the like of the operation panel 9 based on signals from the operation panel 9, humidity sensor 23, internal temperature sensor 24, door sensor 25, microphone 26, and the like. The speaker 27, the steam generator 100, etc. are controlled.

The water supply pump 28 sucks water in the water supply tank 14 and discharges the sucked water toward the steam generator 100.

FIG. 3 is a schematic perspective view of the steam generator 100. FIG. 4 is a schematic perspective view of a state where some components are removed from the steam generator.

As shown in FIGS. 3 and 4, the steam generator 100 includes a cylindrical outer cylindrical portion 101, a cylindrical inner cylindrical portion 102, a cartridge heater 103 capable of supplying 700 W of power, a water supply pipe, and the like. 104 and a steam discharge pipe 105 are provided. The outer cylindrical portion 101 may have a shape other than a cylindrical shape (for example, an elliptical cylindrical shape, a rectangular cylindrical shape, etc.). Similarly to the outer cylinder portion 101, the inner cylinder portion 102 may have a shape other than the cylindrical shape. The cartridge heater 103 is an example of a heater.

The outer cylinder 101 is made of stainless steel. A water supply pipe 104 is connected to the lower end portion 101 a of the outer cylinder portion 101. On the other hand, a steam discharge pipe 105 is connected to the upper end portion 101 b of the outer cylinder portion 101. The upper opening of the outer cylinder portion 101 is closed with a stainless steel lid member 106. Further, an upper annular plate 107 and a lower annular plate 108 are disposed below the outer cylindrical portion 101. In addition, although the outer cylinder part 101 and the cover member 106 were each formed with stainless steel, you may form with metals, such as copper and aluminum, or a ceramic, for example. Further, the lower end portion 101 a of the outer cylindrical portion 101 refers to a portion below the middle of the outer cylindrical portion 101 in the axial direction. Further, the upper end portion 101 b of the outer cylinder portion 101 refers to a portion above the middle of the outer cylinder portion 101 in the axial direction. The lower end portion 101 a of the outer cylinder portion 101 is an example of one end portion of the outer cylinder portion 101 in the axial direction. The upper end 101 b of the outer cylinder 101 is an example of the other end of the outer cylinder 101 in the axial direction.

The lower end of the outer cylindrical part 101 is welded to the entire periphery of the inner peripheral edge of the upper annular plate 107. Thereby, the space between the inner peripheral edge portion of the upper annular plate 107 and the lower end of the outer cylindrical portion 101 is sealed over the entire circumference. The upper annular plate 107 may be formed of stainless steel.

The lower annular plate 108 is fixed to the upper annular plate 107 with a plurality of screws 151, 151. More specifically, the lower surface of the upper annular plate 107 is brought into close contact with the upper surface of the lower annular plate 108 so that gas and liquid cannot pass between the upper surface of the lower annular plate 108 and the lower surface of the upper annular plate 107. Yes. The lower annular plate 108 may be formed of stainless steel.

The inner cylinder part 102 is formed of stainless steel, like the outer cylinder part 101. The axial length of the inner cylindrical portion 102 is shorter than the axial length of the outer cylindrical portion 101. The diameter of the outer peripheral surface of the inner cylindrical portion 102 is smaller than the diameter of the inner peripheral surface of the outer cylindrical portion 101. That is, a space (hereinafter referred to as “a space in the outer cylinder portion 101”) is generated between the outer peripheral surface of the inner cylinder portion 102 and the inner periphery surface of the outer cylinder portion 101. In addition, although the inner cylinder part 102 was formed with stainless steel, you may form with metals, such as copper and aluminum, or a ceramic, for example.

The cartridge heater 103 has a heater body 131 and two lead wires 132 and 132 extending from the lower end surface of the heater body 131 to the outside of the heater body 131.

The heater body 131 is configured such that the outer peripheral surface temperature can rise to a temperature within a range of 700 ° C. to 900 ° C., for example. More specifically, a ceramic score (not shown) around which a heating coil is wound is installed in the heater body 131. The ceramic core is filled with insulating powder. The heater main body 131 is press-fitted into the inner cylindrical portion 102. At this time, a part of the outer peripheral surface of the heater main body 131 is not covered with the inner cylindrical portion 102 and faces the inner peripheral surface of the outer cylindrical portion 101. Further, the heater body 131 is inserted into the radially inner space of each of the upper annular plate 107 and the lower annular plate 108. Although not shown, the space between the heater body 131 and the inner peripheral edge of the lower annular plate 108 is sealed with a heat-resistant sealing material.

The water supply pipe 104 is attached to the outer peripheral surface of the outer cylinder part 101 so as to extend in the radial direction of the outer cylinder part 101. The water supply pipe 104 is made of stainless steel and communicates with the space in the outer cylinder portion 101. More specifically, the water supply pipe 104 guides water from the water supply pump 28 to a lower region (region on the upper annular plate 107 side) in the space in the outer cylindrical portion 101. That is, the water from the water supply pump 28 flows into the lower region in the space in the outer cylindrical portion 101 through the water supply pipe 104. The water supply pipe 104 is connected to the water supply pump 28 via, for example, a resin tube (not shown).

The steam discharge pipe 105 is attached to the outer peripheral surface of the outer cylinder part 101 so as to extend along the radial direction of the outer cylinder part 101. The steam discharge pipe 105 is made of stainless steel, and the inner diameter is the same as the inner diameter of the water supply pipe 104. Further, the angular interval between the steam discharge pipe 105 and the water supply pipe 104 is set to 180 degrees around the central axis of the outer cylinder portion 101. In other words, when the water supply pipe 104 is rotated 180 degrees around the central axis of the outer cylinder part 101, the water supply pipe 104 and the steam discharge pipe 105 overlap each other in the central axis direction of the outer cylinder part 101. Further, the steam discharge pipe 105 communicates with the space in the outer cylinder portion 101. More specifically, the steam discharge pipe 105 discharges saturated steam or superheated steam at 100 ° C. or higher from an upper region (region on the lid member 106 side) in the space in the outer cylindrical portion 101. This saturated steam or superheated steam of 100 ° C. or higher is supplied into the heating chamber 2 and steamed cooking or the like is performed. Further, the tip of the steam discharge pipe 105 is fitted in a through hole (not shown) in the wall of the heating chamber 3. That is, saturated steam or superheated steam is directly supplied from the tip of the steam discharge pipe 105 to the space in the heating chamber 3.

Also, on the outer peripheral surface of the inner cylinder portion 102, fins 109 are provided that extend in a spiral from the lower end portion 101a side of the outer cylinder portion 101 toward the upper end portion 101b side of the outer cylinder portion 101. The fin 109 forms a spiral channel 110. More specifically, the fin 109 is made of stainless steel separately from the inner cylinder portion 102, and the upper end portion 101 b and the lower end portion 101 a are welded to the outer peripheral surface of the inner cylinder portion 102. The fin 109 divides the space in the outer cylindrical portion 101 to form a spiral steam passage. Further, the pitch of the fins 109 on the lower end part 101 a side of the outer cylinder part 101 is the same as the pitch of the fins 109 on the upper end part 101 b side of the outer cylinder part 101. That is, the pitch of the fins 109 is constant. The fins 109 are made of stainless steel, but may be made of a metal such as copper or aluminum, or a ceramic.

According to the cooking device configured as described above, when the water supply pump 28 is driven, the water in the water supply tank 14 is supplied to the lower region in the space in the outer cylindrical portion 101 via the water supply pipe 104. At this time, the heater leads 132 and 132 are energized to increase the temperature of the outer peripheral surface of the heater body 131. Along with this, the temperature of the inner cylindrical portion 102 and the fin 109 rises, and the water in the lower region is heated by the inner cylindrical portion 102 and the fin 109. As a result, saturated steam is generated and flows from the lower end portion 101 a side of the outer cylinder portion 101 toward the upper end portion 101 b side of the outer cylinder portion 101. Therefore, if the temperature of the outer peripheral surface of the heater body 131 is relatively high, the saturated steam is further heated to become superheated steam and reaches the steam discharge pipe 105, so that the superheated steam can be discharged to the steam discharge pipe 105. it can. On the other hand, if the temperature of the outer peripheral surface of the heater body 131 is made relatively low, the saturated steam reaches the steam discharge pipe 105 without being further heated, so that the saturated steam can be discharged to the steam discharge pipe 105.

Further, when the saturated steam is directed from the lower end portion 101a side of the outer cylindrical portion 101 toward the upper end portion 101b side of the outer cylindrical portion 101, the fin 109 serves to demarcate the flow path 110 and transmit the heat of the heater to the saturated steam. Can play a role.

Further, by disposing the cartridge heater 103 in the inner cylinder portion 102, it is not necessary to arrange a heater for heating saturated steam in the space in the outer cylinder portion 101. That is, a member such as a heater disclosed in Japanese Patent Application Laid-Open No. 2015-26565 is not necessary. Therefore, since the axial length of the space can be shortened, the steam generator can be reduced in size.

In addition, when a tube is bent into a spiral shape, there is a limit (minimum bending radius) depending on the thickness (inner diameter) of the tube, so the diameter of the spiral drawn by the tube cannot be reduced, but the fin 109 is not subject to the above limitation. The diameter of the spiral drawn by the fin 109 can be reduced. Therefore, when the fin 109 is arranged in the space in the outer cylinder portion 101, the radial direction of the outer cylinder portion 101 is larger than in the case where the spiral tube is arranged in the space in the outer cylinder portion 101. The thickness can be reduced.

Further, the saturated steam flows along the fins 109 when going from the lower end portion 101 a side of the outer cylindrical portion 101 toward the upper end portion 101 b side of the outer cylindrical portion 101. Since the fin 109 extends so as to draw a spiral from the lower end portion 101a side of the outer cylindrical portion 101 to the upper end portion 101b side of the outer cylindrical portion 101, the flow path 110 has a spiral shape. Therefore, since the flow path 110 can be lengthened, when saturated steam flows through the flow path 110, the saturated steam can be sufficiently heated to reliably generate superheated steam.

Moreover, since the outer cylinder part 101, the inner cylinder part 102, and the fin 109 are formed of stainless steel, the heat resistance of the outer cylinder part 101, the inner cylinder part 102, and the fin 109 can be increased. Therefore, superheated steam exceeding 400 ° C. can be generated.

Also, by using superheated steam exceeding 400 ° C., the cooking speed can be increased.

Moreover, since efficient heating can be performed by the inner cylindrical portion 102 and the fins 109, it is possible to generate superheated steam exceeding 400 ° C. only by supplying 700 W of power to the heater, for example.

On the other hand, when the main body of the steam generator is formed by aluminum die casting as in Japanese Patent No. 4435246, only superheated steam at 400 ° C. can be generated at the maximum.

Also, since the steam generator can be downsized, the degree of freedom in arrangement is high. Therefore, the freedom degree of design of the said heating cooker can be raised.

In the first embodiment, the pitch of the fins 109 on the lower end part 101 a side of the outer cylinder part 101 is the same as the pitch of the fins 109 on the upper end part 101 b side of the outer cylinder part 101. You may make it larger than the pitch of the fin 109 in the part 101b side. In such a case, it is possible to prevent the flow path 110 defined by the fins 109 from being closed by foreign matters such as chalk.

In the first embodiment, the inner diameter of the steam discharge pipe 105 is the same as the inner diameter of the water supply pipe 104, but may be larger than the inner diameter of the water supply pipe 104. In this case, the steam discharge pipe 105 can discharge saturated steam and superheated steam over a wide range.

In the first embodiment, the fin 109 is provided on the outer peripheral surface of the inner cylindrical portion 102. However, the fin 109 may not be provided. For example, instead of the fin 109, a tube extending so as to draw a spiral from the lower end portion 101 a side of the outer cylinder portion 101 toward the upper end portion 101 b side of the outer cylinder portion 101 may be arranged. In this case, the lower end of the pipe may be connected to the water supply pipe 104, while the upper end of the pipe may be connected to the steam discharge pipe 105.

When the tube is provided in the outer cylindrical portion 101, it is not necessary to arrange a heater between a part of the tube and the other portion of the tube. Can be shortened.

[Second Embodiment]
FIG. 5 is a schematic cross-sectional view of a steam generator 200 according to the second embodiment of the present invention.

The steam generating apparatus 200 includes an inner cylinder portion 202 having a different axial length from the inner cylinder portion 102 of the first embodiment. Specifically, the axial length of the inner cylindrical portion 202 is substantially the same as the axial length of the outer cylindrical portion 101. A heater main body 131 is press-fitted into the inner cylinder portion 202. A part of the outer peripheral surface of the heater body 131 protrudes from the upper end and the lower end of the inner cylindrical portion 202 and is exposed.

Further, in the steam generating apparatus 200, the space between the upper end portion 201b of the inner cylindrical portion 202 and the upper end portion 101b of the outer cylindrical portion 101 is closed by the annular top plate 206, while the lower end portion 201a of the inner cylindrical portion 202 is closed. A space between the lower end portion 101 a of the outer cylinder portion 101 is closed with an annular bottom plate 207. Thereby, the inner cylinder part 202 and the outer cylinder part 101 communicate with the outside only through the water supply pipe 104 and the steam discharge pipe 105.

Further, the water supply pipe 104 supplies water into the outer cylindrical portion 101 from above the bottom plate 207. That is, the water supply pipe 104 is arranged so that a predetermined interval is generated between the water supply pipe 104 and the bottom plate 207.

Note that reference numeral 211 denotes a thermocouple for detecting the temperature of the outer peripheral surface of the heater body 131.

The steam generator 200 having the above-described configuration also has the same effects as the steam generator 100 of the first embodiment.

In addition, since a predetermined gap is provided between the water supply pipe 104 and the bottom plate 207, the water supply pipe 104 is in a state of floating from the bottom plate 207. As a result, even if a scale is deposited on the bottom plate 207, water supply by the water supply pipe 104 can be performed.

[Third Embodiment]
FIG. 6 is a schematic cross-sectional view of a steam generator 300 according to the third embodiment of the present invention.

The steam generator 300 includes an inner cylinder portion 102 having a different axial length from the inner cylinder portion 102 of the second embodiment. More specifically, the axial length of the inner cylindrical portion 102 is the same as the axial length of the heater body 131. Thereby, the outer peripheral surface of the heater body 131 is covered with the inner cylindrical portion 102 and is not exposed.

The steam generator 300 having the above configuration also has the same operational effects as the steam generator 200 of the second embodiment.

Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, a combination of the contents described in the first embodiment and the second embodiment or the third embodiment may be used as one embodiment of the present invention.

That is, the above disclosure can be summarized as follows.

The steam generators 100, 200, and 300 according to one aspect of the present invention include:
An outer cylinder 101;
Heaters 103 and 203 disposed in the outer cylindrical portions 102, 202 and 302;
A water supply pipe 104 connected to one end 101a in the axial direction of the outer cylinder 101 and communicating with the inside of the outer cylinder 101;
A vapor discharge pipe 105 connected to the other end 101b in the axial direction of the outer cylinder 101 and communicating with the inside of the outer cylinder 101;
Around the heaters 103 and 203, a spiral is drawn from the one end 101 a side in the axial direction of the outer cylindrical portion 101 toward the other end portion 101 b in the axial direction of the outer cylindrical portion 101. A flow path 110 is provided.

According to the above configuration, a spiral is drawn around the heaters 103 and 203 from the one end portion 101a side in the axial direction of the outer cylindrical portion 101 toward the other end portion 101b side in the axial direction of the outer cylindrical portion 101. Since the extending flow path 110 is provided as described above, when water is supplied to the flow path 110 via the water supply pipe 104, the water in the flow path 110 can be sufficiently heated by the heaters 103 and 203. Therefore, by adjusting the temperature of the heaters 103 and 203, saturated steam or superheated steam can be discharged from the steam discharge pipe 105.

In addition, since the flow path 110 is provided around the heaters 103 and 203, the axial distance between the flow paths 110 can be reduced, so that the axial length of the outer cylindrical portion 101 can be reduced. it can. Therefore, the steam generators 100, 200, and 300 can be downsized.

By the way, when the flow path 110 is formed of a tube, the tube must be bent into a spiral shape, but since there is a limit (minimum bending radius) depending on the thickness (inner diameter) of the tube, the diameter of the spiral drawn by the tube Can not be reduced.

So, the steam generator of one embodiment is
Further provided between the outer cylinder portion 101 and the heaters 103 and 203 is an inner cylinder portion 102, 202, 302 disposed so that the outer peripheral surface faces the inner peripheral surface of the outer cylinder portion 101,
Spirals are formed on the inner peripheral surfaces of the inner cylindrical portions 102, 202, 302 from the one end 101 a side in the axial direction of the outer cylindrical portion 101 toward the other end portion 101 b in the axial direction of the outer cylindrical portion 101. A fin 109 extending so as to draw is provided,
The flow path 110 is formed by the fins 109.

According to the above embodiment, when the flow path 110 is formed by the fins 109, since there is no restriction as described above, the diameter of the spiral drawn by the fins 109 can be reduced. Therefore, compared with the case where the flow path 110 is formed of a tube, the radial direction size of the outer cylindrical portion 101 can be reduced when the flow path 110 is formed of the fins 109.

The steam generator of one embodiment
A bottom plate disposed between the axial end portion 101a of the outer cylindrical portion 101 and the inner cylindrical portions 102, 202, 302;
One end portion 101a in the axial direction of the outer cylindrical portion 101 is located below the other end portion 101b in the axial direction of the outer cylindrical portion 101, and
The water supply pipe 104 supplies water into the outer cylindrical portion 101 from above the bottom plate 207.

According to the embodiment, since the water supply pipe 104 supplies water into the outer cylindrical portion 101 from above the bottom plate 207, the water supply pipe 104 is in a state of floating from the bottom plate 207. As a result, even if a scale is deposited on the bottom plate 207, water supply by the water supply pipe 104 can be performed.

In the steam generators 100, 200, and 300 of one embodiment,
The outer cylindrical portion 101, the inner cylindrical portions 102, 202, 302 and the fin 109 are made of stainless steel.

According to the embodiment, the outer cylindrical portion 101, the inner cylindrical portions 102, 202, 302, and the fins 109 are formed of stainless steel so that the outer cylindrical portion 101, the inner cylindrical portions 102, 202, 302, and the fins 109 are formed. The heat resistance of can be improved. Therefore, for example, superheated steam at 500 ° C. or higher can be generated.

Further, the saturated steam flows along the fins 109 when going from the axial one end 101 a side of the outer cylindrical portion 101 toward the axial other end 101 b of the outer cylindrical portion 101. Since the fin 109 extends so as to draw a spiral from the axial one end portion 101a side of the outer cylindrical portion 101 to the axial other end portion 101b side of the outer cylindrical portion 101, the flow path 110 has a spiral shape. . Therefore, since the said flow path 110 can be lengthened, saturated steam can fully be heated and overheated steam can be generated reliably.

In the steam generators 100, 200, and 300 of one embodiment,
The pitch of the fins 109 on the one end portion 101 a side in the axial direction of the outer cylindrical portion 101 is larger than the pitch of the fins 109 on the other end portion 101 b side in the axial direction of the outer cylindrical portion 101.

According to the above embodiment, in the space between the inner peripheral surface of the outer cylindrical portion 101 and the outer peripheral surfaces of the inner cylindrical portions 102, 202, 302, Evaporates. At this time, the pitch of the fins 109 on the one end portion 101a side in the axial direction of the outer cylindrical portion 101 is larger than the pitch of the fins 109 on the other end portion 101b side in the axial direction of the outer cylindrical portion 101. It is possible to prevent the channel 110 to be closed from being closed by foreign matters such as chalk.

In the steam generators 100, 200, and 300 of one embodiment,
The inner diameter of the steam discharge pipe 105 is larger than the inner diameter of the water supply pipe 104.

According to the above embodiment, since the inner diameter of the steam discharge pipe 105 is larger than the inner diameter of the water supply pipe 104, the steam discharge pipe 105 can discharge saturated steam or superheated steam over a wide range.

The cooking device according to one aspect of the present invention includes:
Any one of the steam generators 100, 200, and 300 described above is provided.

According to the above configuration, the steam generators 100, 200, and 300 can be miniaturized, so the degree of freedom in arrangement is high. Therefore, the freedom degree of design of the said heating cooker can be raised.

3,203 heater 100,200,300 steam generator 101 outer cylinder 101a one end 101b other end 102,202,302 inner cylinder 104 water supply pipe 105 steam discharge pipe 106 lid member 109 fin 110 flow path 131 heater body 132 Lead wire 206 Top plate 207 Bottom plate 211 Thermocouple

Claims (7)

An outer cylinder,
A heater disposed in the outer cylindrical portion;
A water supply pipe connected to one axial end of the outer cylindrical portion and communicating with the inside of the outer cylindrical portion;
A steam discharge pipe connected to the other end portion in the axial direction of the outer cylinder portion and communicating with the inside of the outer cylinder portion;
A flow path is provided around the heater so as to draw a spiral from the one end side in the axial direction of the outer cylindrical portion toward the other end portion in the axial direction of the outer cylindrical portion. A steam generator characterized by comprising: The steam generator according to claim 1,
Further comprising an inner cylinder portion disposed between the outer cylinder portion and the heater so that an outer peripheral surface faces an inner peripheral surface of the outer cylinder portion,
On the inner peripheral surface of the inner cylindrical portion, there is a fin extending so as to draw a spiral from the one end portion side in the axial direction of the outer cylindrical portion toward the other end portion side in the axial direction of the outer cylindrical portion. Provided,
The steam generation device, wherein the flow path is formed by the fin. The steam generator according to claim 2,
Further comprising a bottom plate disposed between one axial end of the outer cylinder and the inner cylinder;
One end portion in the axial direction of the outer cylindrical portion is located below the other axial end portion of the outer cylindrical portion,
The steam generator according to claim 1, wherein the water supply pipe supplies water into the outer cylindrical portion from above the bottom plate. The steam generator according to claim 2 or 3,
The steam generating apparatus, wherein the outer cylinder part, the inner cylinder part, and the fin are made of stainless steel. In the steam generator according to any one of claims 2 to 4,
The steam generator according to claim 1, wherein a pitch of the fin on the one end side in the axial direction of the outer cylinder portion is larger than a pitch of the fin on the other end side in the axial direction of the outer cylinder portion. In the steam generator according to any one of claims 1 to 3,
The steam generator according to claim 1, wherein an inner diameter of the steam discharge pipe is larger than an inner diameter of the water supply pipe. A heating cooker provided with the steam generator according to any one of claims 1 to 6.

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