Oven

Abstract

The present invention provides an oven, which is an oven conducive to efficiently heating an object to be heated, and has a mesh member for placing the object to be heated. The oven includes: a box-shaped heating chamber having an openable and closable door on the front surface and having the mesh member disposed therein; a plurality of heaters extending inside the heating chamber; and a reflection member disposed inside the heating chamber for reflecting heat rays radiated from the plurality of heaters respectively. The plurality of heaters include an upper heater disposed above the mesh member. The reflection member includes a first reflection surface forming a part of the upper surface of the heating chamber, and the first reflection surface is disposed above the upper heater and has a curved surface shape protruding toward the upper heater.

Description

Technical Field

[0001] The present invention relates to an oven. Background Art

[0002] In Patent Document 1, an oven is disclosed which is configured such that a link member rotatably attached to an opening / closing door causes an appliance carrier on which a cooking net is mounted to enter and exit from a cooking chamber as the opening / closing door is opened and closed, and the cooking net enters and exits from the cooking chamber by the entry / exit operation of the appliance carrier.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2017-116225 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] In an oven, a plurality of heaters are provided inside a heating chamber (cooking chamber). It is desired to efficiently irradiate hot lines respectively radiated from the plurality of heaters onto an object to be heated on a cooking net and efficiently heat the object to be heated.

[0008] Therefore, an object of the present invention is to provide an oven that is advantageous for efficiently heating an object to be heated.

[0009] Means for Solving the Problems

[0010] In order to achieve the above object, an oven according to one aspect of the present invention has a net member on which an object to be heated is placed, and is characterized in that the oven includes: a box-shaped heating chamber having an openable / closable door on a front surface and having the net member disposed therein; a plurality of heaters extending inside the heating chamber; and a reflection member disposed inside the heating chamber for reflecting hot lines respectively radiated from the plurality of heaters, the plurality of heaters including an upper heater disposed above the net member, the reflection member including a first reflection surface that forms a part of an upper surface of the heating chamber, the first reflection surface being disposed above the upper heater and having a curved surface shape protruding toward the upper heater.

[0011] In order to achieve the above object, an oven according to one aspect of the present invention has a mesh member for placing an object to be heated, and is characterized in that the oven includes: a box-shaped heating chamber having a door that can be opened and closed on the front surface, and the mesh member is disposed inside; a plurality of heaters extending inside the heating chamber; and a tray detachably provided at the lower part of the heating chamber, the tray having a plurality of protrusions that form a part of the lower surface of the heating chamber and are used for diffusely reflecting the hot wires radiated from the plurality of heaters respectively.

[0012] In order to achieve the above object, an oven according to one aspect of the present invention has a mesh member for placing an object to be heated, and is characterized in that the oven includes: a box-shaped heating chamber having a door that can be opened and closed on the front surface, and the mesh member is disposed inside; and a plurality of heaters extending inside the heating chamber, at least one of the plurality of heaters having a central region in which the heating wire is wound into a spiral shape at a first density and a peripheral region in which the heating wire is wound into a spiral shape at a second density around the central region, and the first density being smaller than the second density.

[0013] Effects of the Invention

[0014] According to the present invention, for example, an oven that is advantageous for efficiently heating an object to be heated can be provided. Description of the Drawings

[0015] Figure 1 It is a front view perspective view of the oven with the front door closed.

[0016] Figure 2 It is a front view perspective view of the oven with the front door open.

[0017] Figure 3 It is a front view perspective view of the oven with the front door open and the mesh member removed.

[0018] Figure 4 It is a sectional perspective view of the oven with the front door closed.

[0019] Figure 5 It is a sectional perspective view of the oven with the front door open.

[0020] Figure 6 It is a sectional perspective view of the oven with the front door open and the mesh member removed.

[0021] Figure 7 It is a sectional view of the oven with the front door closed.

[0022] Figure 8 It is a front view perspective view of the oven with the tray pulled out.

[0023] Figure 9 It is a sectional perspective view of an oven showing the state of pulling out a tray over time.

[0024] Figure 10 It is a diagram schematically showing the state where a hot wire is reflected by each reflecting surface and irradiates an object to be heated.

[0025] Figure 11 It is a sectional view of an oven 100 having a convection mechanism (fan mechanism).

[0026] Figure 12 It is a front view of the oven with the front door open.

[0027] Figure 13 It is a diagram schematically showing a structural example of a heater.

[0028] Explanation of reference numerals

[0029] 10: Main body part, 12: Heater, 13: Reflecting member, 20: Front door, 30: Mesh member, 31: Placing part, 32: Supported part, 33: Hook, 40: Shaft member, 41: Opening, 50: Guide member, 60: Arm member, HC: Heating chamber. Detailed description of the embodiment

[0030] Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings. In addition, the following embodiment does not limit the invention of the claims, and further, the combination of the features described in the embodiment is not all necessary for the invention. Two or more of the multiple features described in the embodiment can also be arbitrarily combined. In addition, the same reference numerals are assigned to the same or similar structures, and redundant descriptions are omitted.

[0031] <First Embodiment>

[0032] Refer to Figures 1 to 6 The oven 100 according to the first embodiment of the present invention will be described. Figures 1 to 3 It is a front perspective view showing the entire oven 100 of the present embodiment, Figures 4 to 6 It is a sectional perspective view (stereogram of the YZ section) of the oven 100 of the present embodiment. In addition, Figure 1 , Figure 4 respectively show the state where the front door 20 of the oven 100 is closed, Figure 2 , Figure 5 respectively show the state where the front door 20 of the oven 100 is open. Figure 3 , Figure 6This represents the state where the front door of the oven 100 is open and the mesh member 30 is removed from the heating chamber HC of the oven 100. It should be noted that in each figure, two directions orthogonal to each other within the plane parallel to the surface (placement surface) on which the object to be heated is placed in the mesh member 30 are set as the X-axis direction (first direction) and the Y-axis direction (second direction), and the direction perpendicular to the X-axis direction and the Y-axis direction is set as the Z-axis direction (third direction). In the following description, the X-axis direction is set as the left-right direction of the oven 100, the Y-axis direction is set as the front-back direction of the oven 100, and the Z-axis direction is set as the up-down direction of the oven 100.

[0033] The oven 100 of the present embodiment is a heating and cooking machine having a mesh member 30 for placing an object to be heated. For example, as Figure 2 shown, the oven 100 has a main body 10 with an open front surface (the surface on the -Y direction side) and a front door 20 that is attached to the front surface of the main body 10 in an openable and closable manner. The main body 10 and the front door 20 form a box-shaped heating chamber HC for heating an object to be heated, and a mesh member 30 and a heater 12 are disposed inside the heating chamber HC.

[0034] The main body 10 is, for example, a housing having a metal inner surface, and legs (support legs) 11 are provided at the bottom on the outside (outer shell), and the mesh member 30 is disposed inside. A plurality of heaters 12 extending in the left-right direction (X-axis direction) are provided inside the main body 10. In the case of the present embodiment, as Figures 4 to 6 shown, one upper heater 12a is provided above the mesh member 30, and two lower heaters 12b to 12c are provided below the mesh member 30, but the number and arrangement of the heaters 12 can be arbitrary. As each heater 12, for example, a carbon heater, a quartz tube, a halogen heater, an armored heater, etc. can be used, but in the present embodiment, a carbon heater is used.

[0035] In addition, a reflection member 13 for efficiently irradiating the object to be heated on the mesh member 30 with heat rays (for example, infrared rays) radiated from the heaters 12a to 12c can be provided inside the main body 10. In the case of the present embodiment, the reflection member 13 is, for example, a metal plate member extending in the left-right direction (X-axis direction), and as Figures 4 to 6 shown, can include a plurality of reflection surfaces (reflector plates) 13a to 13g. Specific structural examples of the respective reflection surfaces 13a to 13g of the reflection member 13 will be described later.

[0036] The front door 20 has a hinge member at its lower part (for example, the lower end), and the front door 20 is configured to be able to open and close the heating chamber HC (main body 10) by rotating around the X-axis in the θX direction with the lower end as the center. In addition, for example, as Figures 4 to 6As shown, the front door 20 can be provided with a handle portion 22 and a window portion 23. The handle portion 22 is a portion for a user to grip to perform the opening and closing operation of the front door 20, and can be made of a material (such as resin or plastic) that is difficult to transfer heat from the heating chamber HC. The window portion 23 is composed of a light-transmitting member so that the user can confirm the inside of the heating chamber HC in the state where the front door 20 is closed (closed state). In the case of the present embodiment, in order to reduce the leakage of heat inside the heating chamber HC to the outside of the oven 100, the window portion 23 is composed of a double structure of LowE glass (low-emissivity glass). In addition, as Figure 1 shown, the front door 20 can be provided with an operation portion 24. The operation portion 24 is a portion operated by the user to set and adjust the heating temperature and / or heating time of the heating chamber HC, and can be composed of, for example, buttons and dials. The operation portion 24 may also have a display portion (display) for displaying information such as the set temperature of the heating chamber HC, the set time, the measured temperature of the heating chamber HC, the remaining heating time, and the elapsed time. It should be noted that when the measured temperature of the heating chamber HC is displayed on the display portion, a sensor for measuring the temperature inside the heating chamber HC may be provided.

[0037] The mesh member 30 is a member in which metal rods are formed in a mesh shape so as to be able to place an object to be heated, and the mesh member 30 can be moved in parallel in the front-rear direction (Y-axis direction) in accordance with the opening and closing of the front door 20 (that is, translational movement). For example, when the user performs the opening operation of the front door 20, for example, as Figure 5 shown, the mesh member 30 is translated forward (-Y direction) along with this opening operation and is pulled out from the inside of the heating chamber HC. On the other hand, when the user performs the closing operation of the front door 20, for example, as Figure 4 shown, the mesh member 30 is translated inward (+Y direction) along with this closing operation and is disposed between the upper heater 12a and the lower heaters 12b to 12c inside the heating chamber HC. If the structure is such that the mesh member 30 is translated during the taking out and putting in of the mesh member 30, the distance in the vertical direction between the mesh member 30 and the main body portion 10 (for example, the upper heater 12a and the reflecting surface 13a of the reflecting member 13) can be kept constant during the translational movement of the mesh member 30. Therefore, events such as the object to be heated being hooked on the main body portion 10 during the taking out and putting in of the mesh member 30 can be reduced.

[0038] In addition, the oven 100 of the present embodiment is configured to be able to remove the mesh member 30 from the inside of the heating chamber HC, thereby improving the cleanability of the inside of the heating chamber HC. That is, the oven 100 of the present embodiment is configured such that when the mesh member 30 is taken out and put in, the mesh member 30 can be translated, and the mesh member 30 can be easily removed from the inside of the heating chamber HC. Hereinafter, the structure of the taking-out and putting-in mechanism of the mesh member 30 in the oven 100 of the present embodiment will be specifically described.

[0039] First, with particular reference to Figure 3 the structure of the mesh member 30 will be described. As Figure 3 shown, the mesh member 30 can be configured to have a placement portion 31 (first portion), a supported portion 32, and a hook 33. The placement portion 31 is a portion for placing an object to be heated. The supported portion 32 is a portion that protrudes in the left-right direction from the outer frame of the placement portion 31, is supported by the guide member 50, and is hooked by the tip 63 of the arm member 60. The hook 33 is a portion for hooking the mesh member 30 to the shaft member 40, and for example, a plurality of hooks 33 can be provided so as to be separated in the left-right direction (X-axis direction).

[0040] Next, with particular reference to Figures 4 to 6 the structure of the taking-out and putting-in mechanism of the mesh member 30 in the oven 100 of the present embodiment will be described. In the oven 100 of the present embodiment, as the taking-out and putting-in mechanism of the mesh member 30, a shaft member 40, a guide member 50, and an arm member 60 are provided.

[0041] The shaft member 40 is formed of, for example, a metal rod and extends in the left-right direction (X-axis direction) inside the heating chamber HC so as to be able to hook the hook 33 provided on the mesh member 30. An opening 41 extending in the front-rear direction (Y-axis direction) is provided on the inner side surface (the surface on the X-axis direction side) of the heating chamber HC, and the shaft member 40 is configured to be guided by the opening 41 and be able to move in the front-rear direction. In addition, the shaft member 40 is biased toward the inner side (+Y direction) of the heating chamber HC by a biasing member such as a spring member. The biasing member is disposed between the inner side surface of the heating chamber HC and the outer side surface (outer shell) of the main body portion 10, and is omitted from illustration in each figure. It should be noted that from the viewpoint of the cleanability of the inside of the heating chamber HC, the shaft member 40 is preferably one, but two or more may be provided as long as the cleanability can be ensured.

[0042] The guide member 50 is formed of a protrusion protruding from the inner side surface of the heating chamber HC toward the central portion of the heating chamber HC, supports the mesh member 30 inside the heating chamber HC, and guides the mesh member 30 so that the mesh member 30 can be translated in the front-rear direction. In the case of the present embodiment, the guide member 50 is formed of a protrusion extending in the front-rear direction (Y-axis direction) on the inner side surface of the heating chamber HC. More specifically, as Figure 6As shown, it can be constituted by a plurality (two) of protrusions 51 and 52 configured to sandwich the supported portion 32 of the mesh member 30 in the vertical direction (Z-axis direction). Here, the opening 41 of the shaft member 40 can be such that, on the inner side surface of the heating chamber HC, the opening 41 is arranged on the inner side (+Y direction side) of the heating chamber HC compared to the guide member 50. By setting it to such a configuration, when the mesh member 30 is removed from the inside of the heating chamber HC, the shaft member 40 extending in the left-right direction of the heating chamber HC can be arranged on the inner side of the heating chamber HC by a biasing member such as a spring member, so that the cleanability of the heating chamber HC can be improved.

[0043] The arm member 60 has a tip portion 63 that can be hooked on the supported portion 32 of the mesh member 30, and is arranged (mounted) on the front door 20 in such a way that the mesh member 30 is pulled out from the inside of the heating chamber HC by the opening operation of the front door 20. In the case of the present embodiment, the arm member 60 can be configured as a link mechanism, which includes: a plate-like first portion 61 mounted on the front door 20; and a plate-like second portion 62 having a tip portion 63 and rotatably mounted on the first portion 61 by a hinge mechanism or the like. The tip portion 63 is formed, for example, by a groove in the second portion 62 through which a metal rod constituting the supported portion 32 of the mesh member 30 passes. By passing the metal rod of the supported portion 32 of the mesh member 30 through this groove, it can be hooked on the supported portion 32 of the mesh member 30. With such a structure, when the user performs the opening operation of the front door 20, the arm member 60 pulls the mesh member 30 forward (-Y direction) accordingly, as Figure 5 shown, the mesh member 30 can be pulled out from the inside of the heating chamber HC. On the other hand, when the user performs the closing operation of the front door 20, the mesh member 30 is pulled inward by the shaft member 40 biased toward the inner side of the heating chamber HC by a biasing member (spring member), so as Figure 4 shown, the mesh member 30 can be arranged inside the heating chamber HC.

[0044] In the oven 100 of the present embodiment, by removing the tip portion 63 of the arm member 60 from the supported portion 32 of the mesh member 30 and removing the hook 33 of the mesh member 30 from the shaft member 40, as Figure 3 、 Figure 6 shown, the mesh member 30 can be easily removed from the inside of the heating chamber HC. In addition, in the state where the mesh member 30 is removed, as described above, since the shaft member 40 is arranged on the inner side of the heating chamber HC by the biasing member, the inside of the heating chamber HC such as the lower heaters 12b to 12c and the reflecting surfaces 13c to 13e can be easily cleaned. That is, the cleanability of the heating chamber HC can be improved.

[0045] Next, refer to Figure 7, the structural example of the reflecting member 13 (reflecting surfaces 13a to 13g) that constitutes the inner surface of the heating chamber HC is described. Figure 7 This is a cross-sectional view (YZ cross-sectional view) of the oven 100 of the present embodiment, showing the state where the front door 20 is closed. Each of the reflecting surfaces 13a to 13g that constitutes the reflecting member 13 of the present embodiment is configured such that, in order to efficiently heat the object to be heated, the hot lines radiated from the heaters 12a to 12c can be efficiently irradiated onto the object to be heated on the mesh member 30.

[0046] The reflecting surface 13a (first reflecting surface) constitutes a part of the upper surface (top surface) inside the heating chamber HC. The reflecting surface 13a is disposed above the upper heater 12a (+Z direction side) and has a curved surface shape that protrudes toward the upper heater 12a. For example, the reflecting surface 13a can be configured such that its side cross-section (YZ cross-section) has an arc shape that protrudes toward the upper heater 12a. The radius of curvature of the arc shape of the reflecting surface 13a can be in the range of 2 cm to 10 cm, preferably in the range of 4 cm to 8 cm, and more preferably in the range of 5 to 7 cm. In the oven 100 of the present embodiment, the radius of curvature of the arc shape of the reflecting surface 13a is 6.07 cm ± 0.2 cm. In addition, the interval G between the reflecting surface 13a and the upper heater 12a can be in the range of 0.2 cm to 1 cm, preferably in the range of 0.3 to 0.8 cm, and more preferably in the range of 0.4 to 0.6 cm. In the oven 100 of the present embodiment, the interval G between the reflecting surface 13a and the upper heater 12a is 0.54 cm ± 0.02 cm. By configuring and disposing the reflecting surface 13a in this way, the hot lines radiated upward from the upper heater 12a can be reflected over a wide range, and the uneven baking of the object to be heated (such as toast) on the mesh member 30 can be reduced.

[0047] The reflecting surface 13b (second reflecting surface) constitutes a part of the upper surface (top surface) inside the heating chamber HC. In the case of the present embodiment, the reflecting surface 13b has a planar shape and is disposed in front of the upper heater 12a (-Y direction side). The reflecting surface 13b can also be configured as a surface continuous with the front end (-Y direction side end) of the reflecting surface 13a (first reflecting surface). In addition, the reflecting surface 13b is inclined with respect to the horizontal plane so as to reflect the hot lines radiated from the upper heater 12a) onto the object to be heated on the mesh member 30. The inclination angle θ1 of the reflecting surface 13b with respect to the horizontal plane is preferably in the range of 15.4 degrees ± 5 degrees, and more preferably in the range of 15.4 degrees ± 1 degree. By configuring the reflecting surface 13b in this way, the hot lines radiated from the upper heater 12a can be efficiently irradiated onto the object to be heated on the mesh member 30. Here, in the present embodiment, the "horizontal plane" can be defined as the surface (loading surface) on which the mesh member 30 (loading portion 31) loads the object to be heated.

[0048] The reflecting surface 13c (the third reflecting surface) forms a part of the inner lower surface (bottom surface) of the heating chamber HC. In the case of the present embodiment, the reflecting surface 13c has a planar shape and is disposed in front of the lower heaters 12b to 12c (-Y direction side). In addition, the reflecting surface 13c is inclined with respect to the horizontal plane so as to reflect the hot lines radiated from the lower heaters 12b to 12c (especially 12b) toward the object to be heated on the mesh member 30. The inclination angle θ2 of the reflecting surface 13c with respect to the horizontal plane is preferably within the range of 54.5 degrees ± 5 degrees, and more preferably within the range of 54.5 degrees ± 1 degree. By configuring the reflecting surface 13c in this way, the hot lines radiated from the lower heaters 12b to 12c can be efficiently irradiated onto the object to be heated on the mesh member 30.

[0049] The reflecting surface 13d (the fifth reflecting surface) forms a part of the inner lower surface (bottom surface) of the heating chamber HC. The reflecting surface 13d is disposed below the lower heaters 12b to 12c (-Z direction side). The reflecting surface 13d is processed to diffusely reflect the hot lines radiated from the heaters 12a to 12c (especially the lower heaters 12b to 12c). In the case of the present embodiment, as this processing, a plurality of protrusions (convex portions) in the shape of a quadrangular pyramid (Japanese: shikaku tsumegata) are formed. By performing such processing on the reflecting surface 13d, the distribution of the hot lines inside the heating chamber HC can be made uniform, and the hot lines can be irradiated onto the object to be heated on the mesh member 30 evenly and efficiently.

[0050] Here, the reflecting surface 13d may also be configured as a surface that is part of a tray 14 detachably (removably) provided at the lower part of the main body 10. Figures 8 to 9 Fig. shows a structural example of the tray 14 having the reflecting surface 13d. Figure 8 is a front perspective view of the entire oven 100, showing a state where the tray 14 is pulled out from the oven 100. In addition, Figure 9 is a sectional perspective view (stereogram of the YZ section) of the oven 100, showing the situation where the tray 14 is pulled out from the oven 100 over time (step by step) as Figure 9 (a) to (c).

[0051] The tray 14 is a member that forms a part of the lower surface (bottom surface) of the heating chamber HC in order to receive the dropped objects (such as breadcrumbs) from the object to be heated placed on the mesh member 30, and is disposed at the lower part of the main body 10 in a removable manner. The tray 14 has a grip portion 14a for the user to hold when pulling out the tray 14 from the oven 100 and a receiving and accommodating portion 14b (receiving tray portion) for receiving the dropped objects from the object to be heated on the mesh member 30. By providing such a tray 14 in the oven 100, the user can Figure 9As shown in (a) to (c) over time, while holding the holding portion 14a, the tray 14 is pulled out from the oven 100, so that it is easy to clean the falling objects from the object to be heated. In addition, the receiving portion 14b of the tray 14 forms a part of the lower surface (bottom surface) of the heating chamber HC and functions as a reflecting surface 13d for diffusely reflecting the heat rays radiated from the heaters 12a to 12c (especially the lower heaters 12b to 12c) in a state where the tray 14 is disposed (installed) at the lower part of the oven 100 ( Figure 9 the state of (a)). In the case of the present embodiment, a plurality of pyramid-shaped protrusions (convex portions) for diffusely reflecting the heat rays radiated from the heaters 12a to 12c (especially the lower heaters 12b to 12c) are formed on the receiving portion 14b (reflecting surface 13d) of the tray 14.

[0052] When the reflecting surface 13d, which is the lower surface of the heating chamber HC, is formed by a plurality of protrusions, the falling objects from the object to be heated accumulate (pile up), and the reflection efficiency is likely to decrease. In addition, it is cumbersome for the user to reach into the open portion on the front surface of the main body 10 with a hand to clean the reflecting surface 13d. Therefore, as in the present embodiment, by configuring a part of the tray 14 (the receiving portion 14b) as the reflecting surface 13d, the cleaning of the reflecting surface 13d can be made easy.

[0053] Returning to Figure 7 , the reflecting surface 13e (the fourth reflecting surface) forms a part of the inner surface inside the heating chamber HC. In the case of the present embodiment, the reflecting surface 13e has a planar shape and is disposed behind the lower heaters 12b to 12c (+Y direction side (inside)). In addition, the reflecting surface 13e is inclined with respect to the horizontal plane so as to reflect the heat rays radiated from the lower heaters 12b to 12c (especially 12c) toward the object to be heated on the mesh member 30. The inclination angle θ3 of the reflecting surface 13e with respect to the horizontal plane is preferably in the range of 56.2 degrees ± 5 degrees, and more preferably in the range of 56.2 degrees ± 1 degree. By configuring the reflecting surface 13e in this way, the heat rays radiated from the lower heaters 12b to 12c can be efficiently irradiated onto the object to be heated on the mesh member 30.

[0054] The reflecting surface 13f (the sixth reflecting surface) forms a part of the inner surface of the heating chamber HC. The reflecting surface 13f is disposed inside the heaters 12a to 12c in the front-rear direction (Y-axis direction) and between the upper heater 12a and the lower heaters 12b to 12c in the up-down direction (Z-axis direction). The reflecting surface 13f can be a surface continuous with the upper side (+Z direction side) of the reflecting surface 13e (the fourth reflecting surface). In addition, the reflecting surface 13f is processed to diffusely reflect the hot lines radiated from the heaters 12b to 12c. In the case of the present embodiment, a plurality of pyramid-shaped protrusions (convex portions) are formed as this processing.

[0055] In addition, the reflecting surface 13g (the seventh reflecting surface) forms a part of the inner surface of the heating chamber HC. In the case of the present embodiment, the reflecting surface 13g has a planar shape and is disposed inside the upper heater 12a (+Y direction side). The reflecting surface 13g can also be configured as a surface continuous with the reflecting surface 13a (the first reflecting surface) and the reflecting surface 13f (the sixth reflecting surface). In addition, the reflecting surface 13g is inclined with respect to the horizontal plane so as to reflect the hot lines radiated from the upper heater 12a toward the object to be heated on the mesh member 30. The inclination angle θ4 of the reflecting surface 13g with respect to the horizontal plane is preferably within the range of 47.4 degrees ± 5 degrees, and more preferably within the range of 47.4 degrees ± 1 degree. By configuring the reflecting surface 13g in this way, the hot lines radiated from the upper heater 12a can be efficiently irradiated onto the object to be heated on the mesh member 30.

[0056] Figure 10 Schematically shows the situation where the hot lines Rd radiated from the respective heaters 12a to 12c are reflected by the respective reflecting surfaces (reflecting surfaces 13a to 13c, 13e, 13g) and irradiated onto the object to be heated on the mesh member 30 (that is, the hot line distribution inside the heating chamber HC). It should be noted that for the reflecting surfaces 13d, 13f configured to diffusely reflect the hot lines, the figure becomes complicated if the diffuse reflection at the reflecting surfaces 13d, 13f is considered. Therefore, in Figure 10 the illustration of the reflection of the hot lines at the reflecting surfaces 13d, 13f is omitted. From Figure 10 it can be seen that with the above structure of the reflecting member 13 (reflecting surfaces 13a to 13c, 13e, 13g), the hot lines Rd radiated from the respective heaters 12a to 12c can be efficiently irradiated onto the object to be heated on the mesh member 30. In addition, if the diffuse reflection of the hot lines Rd at the reflecting surfaces 13d, 13f is considered, it should be understood that the distribution of the hot lines Rd inside the heating chamber HC becomes more uniform, and the hot lines Rd are irradiated onto the object to be heated on the mesh member 30 more uniformly and efficiently. That is, according to the above structure of the oven 100 of the present embodiment, the object to be heated on the mesh member 30 can be heated uniformly and efficiently.

[0057] <Second Embodiment>

[0058] In the second embodiment, an example in which a convection mechanism for causing air (heat) to convect inside the heating chamber HC is provided in the oven 100 will be described with reference to Figures 11 to 12 . It should be noted that this embodiment basically inherits the first embodiment, and the structures such as the plurality of heaters 12 and the reflection members 13 (reflection surfaces 13a to 13g) provided inside the heating chamber HC are as described in the first embodiment.

[0059] Figure 11 FIG. (a) is a cross-sectional view (YZ cross-sectional view) of the oven 100 having a fan mechanism 70 as a convection mechanism, Figure 11 FIG. (b) shows a structural example of the convection fan 71 of the fan mechanism 70. Figure 11 The hollow arrows in FIGS. (a) to Figure 11 FIG. (b) indicate the flow of air. For example, as shown in Figure 11 FIG. (a), the oven 100 of the present embodiment can be provided with a fan mechanism 70 as a convection mechanism. The fan mechanism 70 is used to introduce air from the inside of the heating chamber HC through a plurality of holes provided in the reflection surface 13g of the heating chamber HC, and supply (discharge) the introduced air to the inside of the heating chamber HC. The fan mechanism 70 can include a convection fan 71 and a motor 72 that rotationally drives the convection fan 71. In Figure 11 FIG. (b), a structural example of the convection fan 71 is shown. Figure 11 The dash-dot line in FIG. (b) represents the rotation axis of the convection fan 71 (which can also be understood as the rotation axis of the motor 72). As shown by the hollow arrow in Figure 11 FIG. (b), the convection fan 71 of the present embodiment can be configured to discharge the air introduced from the rotation axis direction in the radial direction by the rotational drive of the motor 72.

[0060] In addition, the fan mechanism 70 of the present embodiment can be configured such that the angle of the rotation axis of the convection fan 71 with respect to the reflection surface 13g converges within a range of 90 degrees ± 5 degrees (preferably 90 degrees ± 1 degree). Specifically, as described above, the reflection surface 13g is inclined at an inclination angle θ4 with respect to the horizontal plane. Therefore, the fan mechanism 70 can be configured such that the inclination angle θ5 of the rotation axis of the convection fan 71 with respect to the horizontal plane converges within a range of 42.6 degrees ± 5 degrees (preferably within a range of 42.6 degrees ± 1 degree). According to this structure, the fan mechanism 70 can arrange the rotation axis of the convection fan 71 substantially perpendicular to the reflection surface 13g. Therefore, by the rotational drive of the convection fan 71, the air inside the heating chamber HC can be efficiently introduced through a plurality of first holes 15a of the reflection surface 13g described later.

[0061] Figure 12FIG. 0 is a view (front view) of the oven 100 with the front door 20 open as viewed from the front, showing the convection of the air in the heating chamber HC by the fan mechanism 70. Figure 12 The hollow arrows in FIG. 0 indicate the flow of air. As Figure 12 shown, a plurality of first holes 15a for introducing the air in the heating chamber HC into the fan mechanism 70 and a plurality of second holes 15b for supplying (discharging) air into the heating chamber HC are formed in the reflecting surface 13g. In Figure 12 the example shown, in the reflecting surface 13g, a plurality of first holes 15a are formed in the central portion in the left-right direction (X-axis direction), and a plurality of second holes 15b are formed around the plurality of first holes 15a in the left-right direction (X-axis direction) (+X-direction side, -X-direction side). In addition, the fan mechanism 70 is disposed inside (+Y-direction side) the plurality of first holes 15a in the reflecting surface 13g. In such a structure, the gas introduced from the heating chamber HC into the fan mechanism 70 through the plurality of first holes 15a can be supplied into the heating chamber HC through the plurality of second holes 15b, and air (heat) convection can be performed inside the heating chamber HC. That is, the temperature distribution inside the heating chamber HC can be made uniform.

[0062] Here, the air introduced from the heating chamber HC by the convection fan 71 temporarily stays inside the oven 100 (specifically, the space between the outer shell of the oven 100 and the reflecting member 13), so heat may be accumulated inside the oven 100. In the oven 100 of the present embodiment, an opening 10a is formed on the upper surface of the outer shell of the main body 10 (see Figures 1 to 3 , Figure 11 ), and the air (i.e., heat) inside the oven 100 is discharged to the outside through the opening 10a. Thereby, it is possible to prevent the temperature of the oven 100 itself from becoming too high, and it is possible to cool the motor 72 of the fan mechanism 70.

[0063] In addition, the fan mechanism 70 may also include a cooling fan 73 for cooling the motor 72. The cooling fan 73 can be mounted on the end of the rotating shaft that is rotationally driven by the motor 72 and is opposite to the end on which the convection fan 71 is mounted. In other words, the convection fan 71 and the cooling fan 73 are mounted on the same rotating shaft with the motor 72 interposed therebetween.

[0064] Further, the oven 100 can also control the energization of each of the heaters 12a to 12c in such a manner as to cause thermal convection inside the heating chamber HC. This energization control can be performed by a control unit (not shown) provided in the oven 100. The control unit has, for example, a CPU, a memory, etc., and can control each unit of the oven 100 according to an operation instruction of a user from the operation unit 24. For example, the control unit can cause air (heat) convection inside the heating chamber HC by sequentially switching, at predetermined time intervals, the one heater among the plurality of heaters 12a to 12c that is energized (lit). As an example, after the upper heater 12a is energized only and a predetermined time has elapsed, the energization of the upper heater 12a is stopped, only the lower heater 12b is energized, and after a predetermined time has elapsed, the energization of the lower heater 12b is stopped, and only the lower heater 12c is energized. Then, after a predetermined time has elapsed, the energization of the lower heater 12c is stopped, and only the upper heater 12a is energized. By repeatedly performing such control (processing), air (heat) convection can be caused inside the heating chamber HC.

[0065] <Third Embodiment>

[0066] In the third embodiment, a structural example of the heater 12 (each of the heaters 12a to 12c) that can irradiate heat rays more uniformly to the object to be heated on the net member 30 will be described. Figure 13 A structural example of the heater 12 of the present embodiment is schematically shown. The heater 12 of the present embodiment is a carbon heater including a heating wire 81 containing carbon (carbon fiber), a glass tube 82 covering the heating wire 81, and terminal portions 83 provided at both ends of the glass tube 82. The heating wire 81 is wound in a spiral shape and generates heat (i.e., radiates heat rays) when energized. In addition, the terminal portion 83 seals the glass tube 82 and can function as an electrode connected to the end of the heating wire 81. By supplying power to the heating wire 81 via the terminal portions 83 provided on both sides of the glass tube 82, heat (heat rays) can be radiated from the heating wire 81 using the resistance of the heating wire 81.

[0067] In the oven 100, there is a tendency for heat rays to concentrate on the central portion inside the heating chamber HC (for example, the central portion of the net member 30 disposed in the heating chamber HC). Therefore, as Figure 13As shown, the heater 12 of the present embodiment can include a central region R1 in which the heating wire 81 is wound at a first density and a peripheral region R2 in which the heating wire 81 is wound at a second density around the periphery of the central region R1 (+X direction side, -X direction side). Moreover, the first density of the heating wire 81 in the central region R1 is smaller than the second density of the heating wire 81 in the peripheral region R2. Thereby, the concentration of the hot wire toward the central portion of the heating chamber HC is alleviated, and the uniformity of the hot wire irradiated onto the object to be heated on the mesh member 30 is achieved. It should be noted that the density of the heating wire 81 can also be understood as the number of turns of the heating wire 81 per unit length and / or the pitch of the heating wire 81.

[0068] Here, the heater 12 can be configured such that, in the left-right direction (X-axis direction), the length of the central region R1 is equal to or greater than the length of one peripheral region R2. For example, the length of the central region R1 can also be 1.5 times or more, or 2 times or more the length of one peripheral region R2. In addition, the heater 12 can be configured such that the first density of the heating wire 81 in the central region R1 is 3 / 4 or less of the second density of the heating wire 81 in the peripheral region R2. For example, the first density can be in the range of 1 / 4 to 3 / 4 of the second density, preferably in the range of 1 / 3 to 2 / 3 of the second density. In the structural example of the heater 12 of the present embodiment, the first density is 1 / 2 of the second density. It should be noted that the above-described structure of the heater 12 can also be applied to all of the plurality of heaters 12a to 12c, but is not limited thereto, and can also be applied to at least one (for example, the upper heater 12a) of the plurality of heaters 12a to 12c.

[0069] The invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. An oven having a mesh member for placing an object to be heated, characterized in that: This oven comprises: A box-shaped heating chamber having an openable and closable door on its front surface, and the mesh member is disposed inside; A plurality of heaters extending inside the heating chamber; and A reflection member disposed inside the heating chamber for reflecting the heat rays respectively radiated from the plurality of heaters, The plurality of heaters include an upper heater disposed above the mesh member, The reflection member includes a first reflection surface disposed above the upper heater so as to form a part of the upper surface of the heating chamber, The first reflection surface is configured to have a curved surface shape protruding toward the upper heater, and the lower end of the first reflection surface is located at a position in front of the upper heater.

2. The oven according to claim 1, characterized in that: The side cross-section of the first reflection surface has an arc shape protruding toward the upper heater.

3. The oven according to claim 2, characterized in that: The radius of curvature of the arc shape of the side cross-section of the first reflection surface is in the range of 2 cm to 10 cm.

4. The oven according to any one of claims 1 to 3, characterized in that: The distance between the first reflection surface and the upper heater is in the range of 0.2 cm to 1 cm.

5. The oven according to any one of claims 1 to 3, characterized in that: The reflection member includes a second reflection surface forming a part of the upper surface of the heating chamber, The second reflection surface has a planar shape and is disposed in front of the upper heater, and is inclined with respect to the placement surface on which the object to be heated is placed on the mesh member so as to reflect the heat rays radiated from the upper heater toward the object to be heated on the mesh member.

6. The oven according to claim 5, characterized in that: The second reflection surface is inclined with respect to the placement surface at an angle within the range of 15.4 degrees ± 5 degrees.

7. The oven according to claim 5, characterized in that: The second reflection surface is a surface continuous with the front end of the first reflection surface.

8. The oven according to any one of claims 1 to 3, characterized in that: The plurality of heaters include a lower heater disposed below the mesh member, The reflection member includes a third reflection surface forming a part of the lower surface of the heating chamber, The third reflection surface has a planar shape and is disposed in front of the lower heater, and is inclined with respect to the placement surface on which the object to be heated is placed on the mesh member so as to reflect the heat rays radiated from the lower heater toward the object to be heated on the mesh member.

9. The oven according to claim 8, characterized in that: The third reflection surface is inclined with respect to the placement surface at an angle within the range of 54.5 degrees ± 5 degrees.

10. The oven according to claim 8, characterized in that: The reflection member includes a fourth reflection surface forming a part of the inner surface of the heating chamber, The fourth reflecting surface has a planar shape and is disposed behind the lower heater, and is inclined with respect to the placement surface so as to reflect the hot wires radiated from the lower heater toward the object to be heated on the mesh member.

11. The oven according to claim 10, wherein: The fourth reflecting surface is inclined with respect to the placement surface at an angle within the range of 56.2 degrees ± 5 degrees.

12. The oven according to any one of claims 1 to 3, wherein: The reflecting member has a fifth reflecting surface that forms a part of the lower surface of the heating chamber, The fifth reflecting surface has a plurality of protrusions for diffusely reflecting the hot wires radiated from the plurality of heaters respectively.

13. The oven according to claim 12, wherein: It further includes a tray detachably provided at the lower part of the heating chamber, The fifth reflecting surface is configured as a surface of a part of the tray.

14. The oven according to any one of claims 1 to 3, wherein: The reflecting member has a sixth reflecting surface that forms a part of the inner surface of the heating chamber, The sixth reflecting surface has a plurality of protrusions for diffusely reflecting the hot wires radiated from the plurality of heaters respectively.

15. The oven according to any one of claims 1 to 3, wherein: The reflecting member has a seventh reflecting surface that forms a part of the inner surface of the heating chamber, The seventh reflecting surface has a planar shape and is disposed behind the upper heater, and is inclined with respect to the placement surface on which the object to be heated is placed on the mesh member so as to reflect the hot wires radiated from the upper heater toward the object to be heated on the mesh member.

16. The oven according to claim 15, wherein: The seventh reflecting surface is inclined with respect to the placement surface at an angle within the range of 47.4 degrees ± 5 degrees.

17. The oven according to claim 15, wherein: It further includes a mechanism for causing heat convection inside the heating chamber, The mechanism has a fan that introduces air from the inside of the heating chamber through the holes of the seventh reflecting surface and supplies the introduced air to the inside of the heating chamber, The fan is configured such that the angle of the rotation axis of the fan with respect to the seventh reflecting surface is within the range of 90 degrees ± 5 degrees.

18. The oven according to any one of claims 1 to 3, wherein: At least one of the plurality of heaters has a central region in which the heating wire is wound in a spiral shape at a first density and a peripheral region in which the heating wire is wound in a spiral shape at a second density around the periphery of the central region, The first density is smaller than the second density.

19. The oven according to any one of claims 1 to 3, wherein: The door has a window portion for the user to confirm the inside of the heating chamber.

20. An oven having a mesh member for placing an object to be heated, wherein: This oven includes: A box-shaped heating chamber having a door that can be opened and closed on the front surface and having the mesh member disposed inside; and A plurality of heaters extending and provided inside the heating chamber At least one of the plurality of heaters has a central region in which a heating wire is wound in a spiral shape at a first density and a peripheral region in which the heating wire is wound in a spiral shape at a second density around the periphery of the central region. The first density is smaller than the second density.

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