JP3701920B2 - Oven equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to improvements in fixed and tunnel type gas / electric ovens used in cooking and baking processing of confectionery, bread making, pizza, etc., and in particular, far-infrared rays generated from a heat source are used as a dough material on a hot plate. It is related to an oven device that irradiates evenly on a workpiece such as, does not cause uneven baking, reduces the amount of water evaporation, and provides good surface baking color, internal flexibility, etc., and easy maintenance Is.
[0002]
[Prior art]
Conventionally, a gas oven apparatus has been generally used for cooking and baking of confectionery, bread making, pizza, etc., for example, as disclosed in Japanese Patent Laid-Open No. 12-116305 proposed by the applicant himself. In addition, far infrared rays generated from an upper heat source such as a far-infrared schwann burner placed on the left and right above the hot plate in the oven kiln are reflected by a reflecting mechanism arranged on the ceiling inner surface in the oven kiln, and the coating on the hot plate Irradiate the workpiece and simultaneously heat the workpiece such as pizza, bread, castella, and gratin on the hot plate by directly heating the workpiece on the hot plate with the lower heat source located below the hot plate. I am doing so. The reflecting member is formed of, for example, an aluminum pipe material, and is inserted and supported by a supporting bar portion spanned between supporting members arranged in the front and rear of the oven kiln. By supporting, it is configured in a double tubular shape. In addition, in order to be able to select the presence / absence of reflection on the workpiece, the adjustment of the reflectance, the reflection mode, etc., for example, when setting a part where reflection is too strong or need not be reflected, the reflection member In order to select the arrangement form of the reflecting members such as not detaching and arranging them properly, or to reduce the reflectance of the reflecting members, the outer surface of the reflecting member itself is processed into a mirror finish, and conversely In order to increase the reflectance, the outer surface of the reflecting member itself is processed into a rough finish.
[0003]
[Problems to be solved by the invention]
However, in such a conventionally proposed oven apparatus, the upper heat source itself is a fixed type whose position and direction cannot be changed at the time of reflection by this reflection mechanism, and the irradiation area to the reflection member by the upper heat source is arbitrarily changed. Therefore, it is relatively difficult to finely adjust the unevenness of baking by uniformly irradiating the whole workpiece. In addition, in the past, in order to be able to select the presence or absence of reflection on the workpiece, adjustment of reflectance, reflection mode, etc., for example, when setting a part etc. where reflection is too strong or need not be reflected The arrangement form of the reflecting member such as not disposing the reflecting member itself is appropriately selected, or when the reflectance of the reflecting member is reduced, the outer surface of the reflecting member itself is processed into a mirror finish state, On the other hand, when increasing the reflectivity, it takes a lot of time and effort to take the troublesome measures such as processing the outer surface of the reflecting member itself into a rough finish.
[0004]
In addition, the conventional reflecting member is formed of, for example, an aluminum pipe material, and is inserted and supported by the supporting bar portion spanned between the supporting members arranged in the front and rear of the oven kiln, and the supporting bar material is used as a core material. Since the reflecting member is supported to form a double tube, both the heat storage rate and the radiation efficiency of the reflecting member are low.
[0005]
Furthermore, conventionally, since the convective heat due to radiation from the lower heat source cannot be adjusted well, only the lower part of the hot plate becomes extremely high temperature, and this causes only the lower surface of the workpiece on the hot plate to become extremely scorched. There was a problem.
[0006]
In addition, since there is no cooling system behind the upper heat source in the past, the upper side of the upper heat source often remains in a high temperature state, and as a result, the life of the upper heat source, for example, the heater part itself There was also a risk that would become extremely short.
[0007]
Therefore, the present invention was created in view of the conventional circumstances as described above, and the position and direction of the upper heat source can be arbitrarily fine-tuned to arbitrarily change the irradiation region of the reflecting member by the upper heat source. As a result, it is possible to irradiate the entire work piece without causing uneven baking, and to improve the heat storage rate and radiation efficiency of the reflecting member, and to the work piece in general. Irradiation can be performed efficiently, and convection heat due to radiation from the lower heat source can be adjusted, so that only the lower part of the hot plate can be prevented from becoming extremely hot. It can be avoided that only the lower surface is burned locally, and a cooling system using natural convection is arranged behind the upper heat source so that the rear portion of the upper heat source can be cooled. Life And to provide an oven apparatus that can bus.
[0008]
[Means for Solving the Problems]
In order to achieve the above-described problem, in the present invention, the near infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are reflected. In the oven apparatus in which the heat plate 2 is diffused and radiated and radiated and radiated onto the hot plate 2 to heat the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the reflection mechanism 10 is provided in the oven kiln 1. The support bar 16 supported along the front and rear of the oven kiln 1 by the support member 11 arranged symmetrically before and after the front and the reflection member 17 supported by being inserted outside the support bar 16 The reflecting member 17 is formed of a pipe material having a good thermal conductivity and a large thermal diffusivity compared to the support bar 16 so as to provide a high heat storage property and a high radiation efficiency. Specific heat is smaller than the pipe material and Conductivity and thermal diffusivity are those in which the pipe large heat storage pipe member from member 18 is made is inserted through.
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In the oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the upper heat source 3 is selected so as to arbitrarily select the irradiation region of the upper heat source 3 on the reflecting member 17 of the reflecting mechanism 10. Can be provided with a non-uniformity adjustment mechanism 20, 30 using a sliding mechanism or a rotation mechanism.
The baking unevenness adjusting mechanism 20 by the sliding mechanism is fixed to the upper end of the partition wall portion 21 that is erected with a gap having a required width between the inner wall of the oven furnace 1 and the edge of the hot plate 2. The fixed base 22 and the sliding plate 23 fixedly arranged in a state where the plurality of upper heat sources 3 are spaced apart and slidable back and forth on the fixed base 22 can be provided.
The baking unevenness adjustment mechanism 30 by the rotation mechanism has a hinge 33 at the upper ends of the left and right partition wall portions 31 that are arranged upright with a gap having a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2. The rotary base 32 is pivotally mounted so as to be rotatable through the base plate and is fixed in a state where a plurality of upper heat sources 3 are spaced apart on one side piece, and the radiant heat diffused and radiated from the reflecting member 17 is brought inward. A flexible partition plate 36 connected and arranged in a plurality of adjacent positions between an edge on one side piece of the rotating base 32 and the ceiling portion inside the oven kiln 1 to reflect the rotating base 32; 32, a rack gear 38 that is screwed so that the teeth are directed outwardly on the inside of the right-angled edge of 32, a drive motor 39 having a pinion gear 39A that meshes with the teeth of the rack gear 38, and the other side piece of the rotary base 32 Projection piece 3 extending at the edge of The upper limit and lower limit limit switches LS1, LS2 arranged on the movement locus of the projection piece 32A so that the stop control of the drive motor 39 is performed by the contact of the projection piece 32A with the rotation of the rotary base 32. And can comprise.
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In an oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the left and right sides of the hot plate 2 can be opened and closed to finely adjust the heat generated by the convection from the lower heat source 4. A convection heat adjustment mechanism 40 having a partition adjustment plate structure may be provided.
The convective heat adjustment mechanism 40 is a fixed base that is erected with a gap of a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2 and the upper heat source 3 is placed and fixed at the upper end. By forming a gap between the left and right partition wall portions 41 formed by mounting 42 and the support frame 43 erected from the edge of the hot plate 2 located inside the partition wall portion 41, A radiant heat flow path of the lower heat source 4 is formed by this gap so as to induce radiant heat to the upper side of the heat plate 2 after passing through the upper heat source 3 with respect to the lower heat source 4 that directly heats the heat plate 2 from the lower side. The upper end of the support frame 43 provided to face the upper heat source 3 installation side so as to shield the radiant heat from the radiant heat toward the workpiece W side on the hot plate 2 at an arbitrary height. The horizontal plate 46 that can be installed and the radiant heat flux from the lower heat source 4 are installed in the upper part. It is combined with the radiant heat flux of the source 3 to generate convection, so that the heat transfer to the workpiece W side on the hot plate 2 is improved in the horizontal direction via the adjusting screw 44 on the upper end side of the support frame 43. The adjusting plate 45 can be movably fixed.
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In an oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the outside air is sent into the oven kiln 1 from the air supply port provided on the rear or left and right sides of the oven kiln 1. Thus, the heat source cooling mechanism 50 for cooling the back side portions of the upper and lower heat sources 3 and 4 themselves by natural convection can be provided.
The heat source cooling mechanism 50 includes a bottom surface portion 53 inside the oven kiln 1 having an intake opening 53A for taking in outside air, a side wall portion 54 having a heat insulating material 54A attached inside and a side surface air supply port 54C, The side wall 54 has a gap of a required width and is relatively laid, and a partition wall 51 standing upright in the form of a partition inside the oven kiln 1, and slightly toward the inside of the oven kiln 1 at the upper end of the partition wall 51 A fixed base 52 in which the frame is fixed in an inclined stepped shape and the upper heat source 3 is spaced apart on the upper surface, and a plurality of holes 55A arranged from the outer edge end portion of the fixed base 52 directly upward. A ceiling portion 55 inside the oven kiln 1 provided with a ceiling-side vertical duct portion 55B formed adjacently and a substantially trapezoidal hollow exhaust port 55C communicating with the upper side of the ceiling-side vertical duct portion 55B, and the oven kiln 1 Equipped with an operation panel 56A It can be constructed by providing the front wall portion 56, the heat exchange chamber P which are surrounded respectively formed by the rear wall portion 57 having a rear portion air inlet 57A drawing outside air.
As the upper and lower heat sources 3 and 4, heat source members such as a ceramic heater, an infrared schbank burner, and a gas burner can be adopted.
[0009]
In the oven apparatus according to the present invention configured as described above, it is formed of a pipe material having a higher thermal conductivity and a higher thermal diffusivity than that of the support bar 16, and the specific heat is generated on the inner peripheral surface thereof. The reflection member 17 formed by inserting a heat storage pipe material 18 which is smaller than the material and has a thermal conductivity / thermal diffusivity larger than that of the pipe material has high heat storage with respect to the reflection member 17 which reflects the radiation from the upper heat source 3. And high radiation efficiency are imparted, and the irradiation heating efficiency by radiation on the entire workpiece W on the hot plate 2 is improved.
The baking unevenness adjustment mechanism 20 by the sliding mechanism allows the irradiation region to the reflecting member 17 by the upper heat source 3 to be arbitrarily changed by sliding the sliding plate 23 back and forth on the fixed base 22. Thus, uneven baking of the workpiece W on the hot plate 2 is prevented.
The baking unevenness adjustment mechanism 30 by the rotation mechanism rotates the rotation base 32 by operating the drive motor 39 so that the irradiation region of the upper heat source 3 on the reflection member 17 of the reflection mechanism 10 can be selected. At this time, when the rotary base 32 is rotated so as to be in a substantially horizontal state, the protruding piece 32A comes into contact with the contact spring of the lower limit switch LS2 to stop the operation by the drive motor 39.
On the other hand, when the rotation base 32 is rotated so that the rotation angle reaches a maximum inclination state between approximately 90 ° and 45 °, for example, the protruding piece 32A comes into contact with the contact spring of the upper limit switch LS1. The operation by the drive motor 39 is stopped.
Accordingly, an excessive amount of rotation of the rotation base 32 can be prevented, and the unevenness of baking can be finely adjusted with respect to the workpiece W such as various dough materials arranged on the hot plate 2.
The convection heat adjustment mechanism 40 having a partition adjustment plate structure adjusts the heating power due to the convection of the lower heat source 4. When the heating power is weakened, the adjustment plate 45 is twisted in the pushing direction of the adjustment screw 44 so that the adjustment plate 45 is attached to the upper end of the support frame 43. It moves to the direction which closes the radiant heat flow path of the lower heat source 4 near the partition wall 41 side on the side.
On the other hand, when the heating power is strengthened, the adjusting plate 45 is moved away from the partition wall 41 on the upper end side of the support frame 43 by the twisting rotation of the adjusting screw 44 in the pulling direction to expand the radiant heat flow path of the lower heat source 4. . The horizontal plate 46 that can shield the upper heat source 3 by appropriately changing the installation height with respect to the support frame 43 radiates heat from the upper heat source 3 toward the workpiece W on the heat plate 2. To prevent excessive reach.
Thus, by closing or enlarging the radiant heat flow path by the adjusting plate 45, changing the installation height of the horizontal plate 46, etc., the radiant heat to the workpiece W to be fired can be uniformly distributed. While preventing the workpiece W from being burnt, the inside of the oven kiln 1 is made into a convection heat transfer system according to the firing conditions by convection heat transfer accompanying the merging of the radiant heat flux from the upper and lower heat sources 3 and 4, thereby Unevenness of baking on the workpiece W is prevented.
In the heat source cooling mechanism 50, outside air is taken into the cooling heat exchange chamber P inside the oven kiln 1 from the side surface air supply port 54 </ b> A of the side wall portion 54 through the intake opening 53 </ b> A of the bottom surface portion 53. At the same time, outside air is also taken into the cooling heat exchange chamber P inside the oven kiln 1 from the back surface air supply port 57 </ b> A of the back wall portion 57. After the outside air taken into the cooling heat exchange chamber P cools the lower surface portion of the upper heat source 3, the warmed outside air rises from the exhaust port 55C via the ceiling-side vertical duct portion 55B of the ceiling portion 55. Exhausted outside. In this way, the lifetime of the upper heat source 3 is prevented from being reduced due to the high temperature by the cooling system using the principle of natural convection.
The upper and lower heat sources 3 and 4 employing heat source members such as a ceramic heater and an infrared schwann burner perform the heat treatment by causing the near-infrared rays from the upper heat source 3 to be diffusely reflected by the reflection mechanism 10 and diffused and radiated on the hot plate 2. Moreover, the heat storage effect of heating the hot plate 2 itself from below by the near infrared rays from the lower heat source 4 is enhanced, and an oven apparatus that is easy to maintain is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the drawing is a heat-insulating oven kiln formed in a substantially sealed structure. The workpiece W, which is a variety of dough materials to be cooked and fired, such as pizza, bread, castella, gratin, etc., is placed on the hot plate 2 made of asbestos or the like that is opened and closed by 61 and placed on the bottom. (See FIG. 14). On the left and right sides of the oven kiln 1 are disposed, for example, an upper heat source 3 that is directed upward, and includes a heating unevenness adjusting mechanism 20, 30 such as a sliding mechanism or a rotating mechanism, which will be described later. The heating plate 2 itself is heated by the lower heat source 4 arranged in the above. As the upper and lower heat sources 3 and 4, heat source members such as a ceramic heater, an infrared schwann burner, and a gas burner can be employed.
[0011]
With these upper and lower heat sources 3 and 4, the inside of the oven kiln 1 is heated to a temperature of about 300 ° C., for example, about 400 ° C. for a short time such as about 5 to 10 minutes in the case of pizza. In such a case, heating is performed at a medium temperature of about 200 ° C. for a long time such as about 10 to 40 minutes. In particular, when heating by the upper heat source 3, the workpiece W on the hot plate 2 is heated by irradiating the workpiece W on the hot plate 2 with a reflecting mechanism 10 described later having high heat storage and high emissivity disposed on the upper part of the oven kiln 1. In addition, by providing a heat release opening that can be freely opened and closed on the ceiling in the oven kiln 1, convection is generated in the oven kiln 1 so that a predetermined heating atmosphere is formed.
[0012]
In addition, on both the left and right sides of the heat plate 2, a convection heat adjustment mechanism 40 having a partition adjustment plate structure that can be opened and closed to finely adjust the heat generated by the convection from the lower heat source 4 is provided, and the life of the upper and lower heat sources 3 and 4 is increased. In order to extend, the heat source cooling mechanism for sending outside air into the oven kiln 1 from the air supply port provided on the rear or left and right side surfaces of the oven kiln 1 and cooling the back side portions of the upper and lower heat sources 3 and 4 themselves by natural convection 50.
[0013]
(Reflection mechanism 10)
Hereinafter, a specific configuration of the reflection mechanism 10 in the oven apparatus according to the present invention will be described with reference to FIGS. The reflection mechanism 10 diffuses and radiates radiant heat from near-infrared rays from the upper heat source 3 on its outer surface, diffuses and radiates it onto the hot plate 2 like a shower, and the dough material that is the workpiece W placed on the hot plate 2 The heat treatment is performed by baking around the enveloping heat. In other words, the reflection mechanism 10 includes a plurality of mounting portions 15 arranged, and the oven kiln 1 includes, for example, a support member 11 that is symmetrically arranged on the front and rear side walls of the oven kiln 1 and front and rear mounting portions 15. A small-diameter pipe-like support bar 16 made of, for example, a stainless steel core bar supported along the front and rear of 1, and a large-diameter pipe-like reflection member 17 supported by being inserted outside the support bar 16; (See FIG. 3 and FIG. 4).
[0014]
The support member 11 is positioned at or near the upper part in the oven kiln 1 that supports and supports the reflecting member 17, and is fixedly disposed by, for example, screwing, welding, or the like. The upper central part and the upper left and right side parts are arranged separately. As shown in FIG. 3, the support member 11 itself is a connecting piece 13 that is bent in a substantially horizontal shape at the lower edge of the fixing piece 12 that is abutted and fixed to the inner side surfaces of the front and rear side walls of the oven kiln 1 by screws or the like. Further, the mounting support piece 14 that is substantially parallel to the fixing piece 12 is further bent to form a substantially groove shape in cross section, and the mounting support piece 14 has a groove shape or a hole shape that is open at its upper edge. A plurality of attachment portions 15 are formed in an array, and the support bar 16 is supported so as to be bridged between the support members 11 by fitting to the attachment portions 15.
[0015]
As shown in FIG. 4, the reflecting member 17 has a large thermal conductivity such as aluminum and has a large thermal diffusivity compared to the support bar 16 in order to increase heat storage and increase radiation efficiency. A pipe material 18 for heat storage, such as copper, having a specific heat smaller than that of aluminum and larger in both thermal conductivity and thermal diffusivity than aluminum, is inserted in the inner peripheral surface of the pipe material. The reflection member 17 is inserted and supported by the support bar 16 extending between the support members 11 before and after the oven kiln 1, and the support member 16 is used as a core to support the reflection member 17 so that the insertion support state is as follows. For example, it is configured in a double tubular shape. In addition, since the reflecting member 17 is assumed not to be able to obtain the reflecting action when it is not supported without being supported by the support bar 16, for example, a portion where the reflection is too strong or the reflection is not necessary is set. For example, when the reflecting member 17 itself is not disposed, the presence / absence of reflection corresponding to the workpiece W, the adjustment of the reflectance, the reflection mode, and the like can be selected.
[0016]
Next, an example of use and operation of the embodiment configured as described above will be described. As shown in FIG. 1, a work W such as pizza or bread to be cooked and baked on the hot plate 2. On the other hand, the arrangement of the reflecting members 17 is appropriately selected according to the presence or absence of reflection corresponding to the workpiece W, the magnitude of the reflectance, and the like. That is, usually, the support bar 16 is mounted and supported between the support members 11 arranged before and after the oven kiln 1, and the reflection member 17 is inserted and supported to a portion that needs to be reflected. When heating by the upper heat source 3, the near-infrared rays generated therefrom are reflected by the respective reflecting members 17 of the reflecting mechanism 10 and are irradiated onto the workpiece W on the hot plate 2. At this time, the near infrared rays from the upper heat source 3 are scattered without being concentrated in a specific area by the outer surface of the reflecting member 17 having high heat storage property and high radiation efficiency, and is irradiated almost uniformly on the hot plate 2. Further, it is assumed that irradiation is performed not only from the direction directly above the workpiece W but also from the side surface direction. Moreover, even if the heat of the reflecting member 17 escapes outside when the door of the oven kiln 1 is opened, the inside of the oven kiln 1 can be heated by the remaining heat from the heat storage pipe material 18 made of copper or the like of the reflecting member 17.
[0017]
(Making adjustment mechanism 20 by sliding mechanism)
A specific configuration of the uneven baking adjustment mechanism 20 using a sliding mechanism for horizontally sliding the left and right upper heat sources 3 in the front-rear direction in the oven apparatus according to the present invention will be described below with reference to FIG. That is, the sliding mechanism of the upper heat source 3 arranged on the left and right inside the oven kiln 1 is arranged upright with a gap of a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2. A strip plate-like sliding plate 23 is supported on the right and left partition wall portions 21 on a slightly inclined angle strip plate-like fixed base 22 mounted and fixed to the upper end of the partition wall portion 21. It arrange | positions so that it can slide back and forth along a direction. For example, four ceramic heaters as a plurality of upper heat sources 3 having a rectangular shape are fixed to the upper surface of the sliding plate 23 by a fixing bracket 24 in a state of being spaced apart in the longitudinal direction. In order to indicate the amount of movement of the sliding plate 23, a scale pointer 23A is attached to one end of the sliding plate 23, and a scale scale 22A indicated by the pointer 23A is attached to the fixed base 22. It is.
[0018]
As a specific example of this sliding mechanism, for example, a plurality of screw holes 25 spaced apart with a predetermined length on both the left and right sides of the fixed base 22 are arranged on both the left and right sides of the sliding plate 23 so as to face the screw holes 25. A plurality of long holes 26 formed at predetermined intervals are aligned with each other, and a fixing screw 27 inserted through the long holes 26 is screwed into the screw holes 25 of the fixed base 22 so as to slide. A moving plate 23 is slidably fixed. As a result, the sliding plate 23 can be slid back and forth by a manual operation or operation by a drive source (not shown), for example, by a stroke distance corresponding to the length of the long hole 26 on the fixed base 22. The irradiation region of the upper heat source 3 with respect to the reflective member 17 is arbitrarily selected. In the present embodiment, a ceramic heater is used as the upper heat source 3 disposed on the upper surface of the sliding plate 23. However, the present invention is not limited to this, and a heat source member such as an infrared Schwann burner or a gas burner may be used. Of course it is good.
[0019]
Next, an example of use and operation of the embodiment configured as described above will be described. As shown in FIG. 5, sliding on the fixed base 22 by manual operation or operation by a drive source (not shown). By sliding the moving plate 23 back and forth, the irradiation area of the upper heat source 3 for the reflecting member 17 of the reflecting mechanism 10 is selected in advance. At this time, the moving amount of the sliding plate 23 can be easily set by matching the scale indicator 23A of the sliding plate 23 with the scale scale 22A of the fixed base 22. As a result, the unevenness of baking can be finely adjusted with respect to the workpiece W, which is a variety of dough materials and the like disposed on the hot plate 2.
[0020]
(Burn unevenness adjustment mechanism 30 by rotation mechanism)
FIG. 6 shows a specific configuration of the baking unevenness adjusting mechanism 30 by a rotating mechanism for changing the irradiation angle of the upper heat source 3 directed to each reflecting member 17 of the reflecting mechanism 10 in the oven apparatus according to the present invention. This will be described with reference to FIG. In other words, the rotation mechanism of the upper heat source 3 arranged on the left and right inside the oven kiln 1 is a left-right arrangement with a gap of a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2. Are respectively supported by the partition wall portions 31. At the upper end of the partition wall portion 31, the outer side of the right-angled edge of the so-called angle-shaped rotation base 32 obtained by bending the belt plate at right angles along the longitudinal direction is pivotally attached via a hinge 33. For example, four ceramic heaters as a plurality of upper heat sources 3 having a rectangular shape are fixed on one side piece of the rotating base 32 by a fixing bracket 34 in a state of being spaced apart in the longitudinal direction.
[0021]
One end of a pair of left and right flexible members, for example, a plate link-like chain member 35 is connected to an edge on one side piece of the rotating base 32, and each other end of both chain members 35 is connected to the rotating base. A plurality of horizontally long partition plates 36 that are connected to a ceiling portion inside the oven kiln 1 positioned directly above 32 and reflect the radiant heat diffused and radiated from the reflecting member 17 to the left and right chain members 35. The straddles are arranged with no gaps sequentially from the lower side to the upper side so as to straddle.
[0022]
An arc-shaped rack gear 38 is screwed to the inside of the right-angled edge of the rotation base 32 through a fan-shaped flange portion 37 formed on one of the left and right sides of the rotation base 32 so that the teeth are directed outward. A tooth portion of the rack gear 38 is meshed with a pinion gear 39A fixed to the output shaft of the drive motor 39 disposed below the table 32. Further, a protrusion piece 32A is extended at the edge of the other side piece of the rotation base 32, and both upper and lower limit switches LS1 are arranged on the movement locus of the protrusion piece 32A as the rotation base 32 rotates. , LS2 contacts the contact springs to stop the operation of the drive motor 39. That is, when the rotation base 32 is rotated so as to be in a substantially horizontal state, the projecting piece 32A comes into contact with the contact spring of the lower limit switch LS2, thereby stopping the operation of the drive motor 39 and preventing further rotation. To do. On the other hand, when the rotation base 32 is rotated so that, for example, the rotation angle is in a maximum inclination state between approximately 90 ° and 45 °, the projecting piece 32A comes into contact with the contact spring of the upper limit switch LS1, thereby driving the motor. The operation by 39 stops and prevents further rotation in the tilt direction. The drive motor 39 is operated by the operation of a switch disposed on the outer wall surface of the oven kiln 1.
[0023]
In this way, the upper heat source 3 together with the rotating base 32 is tilted to an arbitrary angle within the range of about 90 ° to 45 ° from the substantially horizontal position (see FIG. 6) inclined slightly inward (see FIG. 7). As a result, it is possible to select an irradiation region to the reflecting member 17 side by the upper heat source 3, and at the same time, the radiant heat diffused and radiated from the reflecting member 17 as the partition plate 36 bends inward as the rotating base 32 rotates. Is reflected inward. In order to indicate the amount of rotation of the rotary base 32, a scale pointer 32B is attached to one end of the rotary base 32 on the hinge side, while a circle indicated by the pointer 32B is provided on the inner wall of the oven kiln 1. An arc-shaped scale 32C is provided.
[0024]
FIGS. 8 and 9 show the case where the upper heat source 3 is an infrared schwann burner or a gas burner, and a specific configuration of the baking unevenness adjusting mechanism 30 by a rotating mechanism for changing the irradiation angle of the upper heat source 3. Is substantially the same as the case where a ceramic heater is employed as the upper heat source 3 described above. In addition, the code | symbol 39B in a figure is a flexible tube for adjusting the angle of a supply pipe line when the angle adjustment in the upper heat source 3 which is an infrared schbank burner or a gas burner is made.
[0025]
Next, an example of use and operation of the embodiment configured as described above will be described. By rotating the drive motor 39 by operating a switch disposed on the outer wall surface of the oven kiln 1, a rotating base 32 is rotated, and the irradiation region of the upper heat source 3 with respect to the reflection member 17 of the reflection mechanism 10 is selected in advance. At this time, as shown in FIG. 6 or FIG. 8, when the rotation base 32 is rotated so as to be in a substantially horizontal state, the projecting piece 32A comes into contact with the contact spring of the lower limit switch LS2, thereby driving the motor 39. The operation due to stops. On the other hand, as shown in FIG. 7 or FIG. 9, when the rotation base 32 is rotated so that the rotation angle is in a maximum inclination state between about 90 ° and 45 °, for example, the protrusion piece 32A has an upper limit. The operation by the drive motor 39 is stopped by contacting the contact spring of the limit switch LS1. The amount of rotation of the rotary base 32 can be easily set by aligning the scale pointer 32B of the rotary base 32 with an arbitrary scale position of the scale scale 32C. As a result, the unevenness of baking can be finely adjusted with respect to the workpiece W, which is a variety of dough materials and the like disposed on the hot plate 2.
[0026]
(Convection heat adjustment mechanism 40)
Hereinafter, a specific configuration of the convection heat adjustment mechanism 40 in the oven apparatus according to the present invention will be described with reference to FIGS. 10 and 11. The convective heat adjustment mechanisms 40 arranged on the left and right inside the oven kiln 1 are provided to face the upper heat source 3 installation side, and the radiant heat is excessive from the upper heat source 3 toward the workpiece W on the hot plate 2. For example, the horizontal plate 46 formed by sticking asbestos to the surface of the mesh-shaped iron net plate to shield the radiant heat so that the radiant heat flux from the lower heat source 4 is combined with the radiant heat flux of the upper heat source 3. The adjustment plate 45 is configured to improve heat transfer to the workpiece W side on the hot plate 2 by causing convection.
[0027]
That is, a fixed base 42 for standing and arranging a gap having a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2 and for fixing the upper heat source 3 on the upper end is provided. With respect to the left and right partition walls 41 formed by mounting, the support frames 43 on the horizontally long strips are erected from the edge of the hot plate 2 located on the inner side, and the partition walls 41 and the support frames 43 By forming a gap between the lower heat source 4 and the lower heat source 4 for directly heating the heat plate 2 from the lower side, the lower heat source is guided by this gap to induce radiant heat to the upper side of the heat plate 2 after passing through the upper heat source 3. 4 radiant heat flow paths are formed. On the upper end side of the support frame 43, an L-shaped strip-shaped adjustment plate 45 comprising a horizontal surface portion 45A and a vertical surface portion 45B that can be fixed to be movable in the horizontal direction via adjustment screws 44 arranged on the left and right. Is arranged. Further, adjustment screws 44 are respectively attached to the left and right ends of the vertical surface portion 45B of the adjustment plate 45, and the horizontal plane portion 45A of the adjustment plate 45 is moved on the upper end side of the support frame 43 by twisting the adjustment screw 44 in the pushing direction. It can move in the direction close to the partition wall 41 side and close the radiant heat flow path of the lower heat source 4, and the horizontal plane 45 </ b> A of the adjustment plate 45 is partitioned at the upper end side of the support frame 43 by the twisting rotation of the adjustment screw 44 in the pulling direction. It is configured to be able to move away from the wall portion 41 in the direction in which the radiant heat flow path of the lower heat source 4 is expanded, and thereby, the heating power by the convection of the lower heat source 4 can be finely adjusted.
[0028]
Further, the horizontal plate 46 can be installed at an arbitrary height on the upper end of the support frame 43 via a bifurcated leg portion 47 provided on both ends of the lower edge of the horizontal plate 46. That is, on the left and right ends of the lower edge portion of the horizontal plate 46, an insertion groove 48 having a rectangular column shape and a slit width corresponding to the thickness of the support frame 43 is formed on the lower surface of the leg 47 at the lower end. Has been. A plurality of holes 48A for penetrating the anchor pin member 49 so as to penetrate the insertion groove 48 are formed on the side surface of the leg 47 in the vertical direction, thereby supporting the support frame. When the insertion groove 48 of the leg 47 is fitted into the upper end of 43, the support frame 43 is locked by the pin member 49. Therefore, when the installation height of the horizontal plate 46 with respect to the support frame 43 is appropriately changed, it is easily performed by selecting a plurality of holes 48A through which the pin members 49 are inserted. In addition, when the leg portion 47 of the horizontal plate 46 is fitted to the upper end of the support frame 43, concave portions 45C are provided on both sides of the horizontal plane portion 45A so that the horizontal plane portion 45A of the adjustment plate 45 does not become a barrier. Further, a scale pointer 41A is attached to the partition wall portion 41, while a scale scale 41B indicated by the pointer 41A is attached to the horizontal surface portion 45A of the adjustment plate 45.
[0029]
Next, in order to explain an example of use and operation of the embodiment configured as described above, as shown in FIG. 11, when adjusting the thermal power due to the convection of the lower heat source 4, when reducing the thermal power, Due to the twisting rotation of the adjusting screw 44 in the pushing direction, the horizontal surface portion 45A of the adjusting plate 45 moves close to the partition wall 41 side on the upper end side of the support frame 43 in the direction of closing the radiant heat flow path of the lower heat source 4. On the other hand, when the heating power is increased, the horizontal plane portion 45A of the adjustment plate 45 is separated from the partition wall portion 41 on the upper end side of the support frame 43 by the twisting rotation of the adjustment screw 44 in the pulling direction, and the radiant heat flow path of the lower heat source 4 is formed. Move in the direction of enlargement. As a result, the heat generated by the convection of the lower heat source 4 can be finely adjusted. Further, when the installation height of the horizontal plate 46 with respect to the support frame 43 is appropriately changed, one of the plurality of holes 48A is selected, and the pin member 49 is inserted therethrough before the horizontal plate 46 is inserted. The leg 47 may be fitted to the upper end of the support frame 43. In this way, the radiant heat to the workpiece W to be fired can be evenly distributed by closing or expanding the radiant heat flow path by the horizontal surface portion 45A of the adjustment plate 45, changing the installation height of the horizontal plate 46, etc. Since the workpiece W is not burned, the convection heat transfer system in accordance with the firing conditions can be formed in the oven kiln 1 by the convection heat transfer of the radiant heat from the upper and lower heat sources 3 and 4. On the other hand, no burning unevenness occurs.
[0030]
(Heat source cooling mechanism 50)
Hereinafter, a specific configuration of the heat source cooling mechanism 50 in the oven apparatus according to the present invention will be described with reference to FIGS. First, a case where a ceramic heater is employed as the upper heat source 3 will be described. That is, the heat source cooling mechanism 50 of the upper heat source 3 provided on the left and right inside the oven kiln 1 has a plurality of rectangular intake openings for taking outside air from a side surface air supply port 54C described later through a bottom surface side duct portion. A bottom surface portion 53 inside the oven kiln 1 having a portion 53A, and a side surface air supply port 54B formed by adhering a heat insulating material 54A inside and forming a plurality of small holes in the bottom surface portion 53 adjacent to each other in a horizontal row. The side wall portion 54 that forms the outer wall of the left and right side surfaces of the oven kiln 1, and the partition wall portion that has a gap of the required width with the side wall portion 54 and is arranged upright as a partition wall inside the oven kiln 1. 51, for example, four ceramic heaters serving as a plurality of upper heat sources 3 which are mounted and fixed in a stepped shape slightly inclined toward the inside of the oven kiln 1 at the upper end of the partition wall portion 51 and have a rectangular shape on the upper surface. Separated in the longitudinal direction A strip-shaped fixed base 52 and a ceiling-side vertical duct portion 55B formed by adjacently forming a plurality of rectangular hole portions 55A arranged from the outer edge end portion of the fixed base 52 directly above, and the ceiling A ceiling portion 55 inside the oven kiln 1 provided with a substantially trapezoidal hollow exhaust port 55C arranged in communication with the upper side of the side vertical duct portion 55B, a front wall portion 56 provided with an operation panel 56A of the oven kiln 1, and outside air Is provided with a substantially rectangular space-shaped cooling heat exchange chamber P surrounded by the back wall portion 57 having a substantially rectangular back surface air inlet 57A for taking in the air.
[0031]
Next, an example of use and operation of the embodiment configured as described above will be described. As shown in FIG. 12, the side wall portion 54 passes through the bottom surface side duct portion from the side surface air supply port 54A. Outside air is taken into the cooling heat exchange chamber P inside the oven kiln 1 through the intake opening 53 </ b> A of the bottom surface portion 53. At the same time, outside air is also taken into the cooling heat exchange chamber P inside the oven kiln 1 from the back surface air supply port 57 </ b> A of the back wall portion 57. The outside air taken into the cooling heat exchange chamber P is a portion on the lower surface side of the upper heat source 3, for example, in the case of a ceramic heater, after cooling the energized nichrome wiring portion, the warmed outside air rises while the ceiling portion The air is exhausted to the outside from the exhaust port 55C through the 55 vertical ceiling-side duct portion 55B. Thus, the cooling system utilizing the principle of natural convection prevents the life of the upper heat source 3 from decreasing due to the high temperature.
[0032]
FIG. 13 shows a case where an infrared Schwann burner or a gas burner is employed as the upper heat source 3 instead of the ceramic heater. That is, the life of the burner itself is extremely shortened when the temperature of the mixing tube 58 such as an infrared schwann burner or a gas burner disposed on the lower surface side of the upper heat source 3 becomes high. It is necessary to extend the life of the burner by cooling the mixing tube 58.
[0033]
Specifically, a cooling system using a so-called natural convection principle is used in which sufficient air is supplied to the primary air inlet 58A of the mixing pipe 58 after the outside of the main body is insulated. For example, the primary air intake 58A of the mixing tube 58 provided on the lower side of the infrared schwann burner or gas burner arranged on the fixed base 52 faces the back side air supply port 57A of the back wall 57. Then, outside air is taken into the cooling heat exchange chamber P inside the oven kiln 1 through the plurality of rectangular openings 53A of the bottom surface portion 53 from the side surface air supply port 54A of the side wall portion 54 through the bottom surface portion side duct portion. At the same time, outside air is also taken into the cooling heat exchange chamber P inside the oven kiln 1 from the back surface air supply port 57 </ b> A of the back wall portion 57. The outside air taken into the cooling heat exchange chamber P is sent to the primary air intake 58A of the mixing pipe 58 which is the lower surface side portion of the upper heat source 3 to cool the mixing pipe 58 itself, and then warmed outside air. Ascending, the air is exhausted to the outside from the exhaust port 55C through the ceiling-side vertical duct portion 55B of the ceiling portion 55. Thus, the cooling system using the principle of natural convection prevents the life of the upper heat source 3 from being reduced due to the high temperature.
[0034]
【The invention's effect】
Since the present invention is configured as described above, the position and direction of the upper heat source 3 can be arbitrarily finely adjusted to arbitrarily change the irradiation area of the upper heat source 3 to the reflecting member 17. The entire workpiece W can be irradiated evenly without causing uneven baking. Further, the heat storage rate and radiation efficiency of the reflecting member 17 can be improved, so that the entire workpiece W can be efficiently irradiated, and the convection heat due to radiation from the lower heat source 4 is adjusted. Therefore, it is possible to prevent only the lower part of the hot plate 2 from becoming an extremely high temperature state, thereby avoiding that only the lower surface of the workpiece W on the hot plate 2 is locally burned. In addition, an oven apparatus is provided in which a cooling system using natural convection is disposed behind the upper heat source 3 so that the back side portion of the upper heat source 3 can be cooled, thereby extending the life of the upper heat source 3. can do.
[0035]
That is, the near-infrared rays from the upper heat source 3 directed upward to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected and diffused and radiated on the hot plate 2 for heat treatment. The reflection mechanism 10 for performing the operation is supported by being inserted outside the support bar 16 supported along the front and rear of the oven kiln 1 by the support members 11 arranged symmetrically in the front and rear in the oven kiln 1. The reflecting member 17 is provided with a pipe member having a higher thermal conductivity and a higher thermal diffusivity than the support bar 16 so as to impart high heat storage and high radiation efficiency. Since the heat storage pipe material 18 whose specific heat is smaller than that of the pipe material and whose heat conductivity / thermal diffusivity is larger than that of the pipe material is inserted into the surface, the heat storage space state in the oven kiln 1 is maintained for a long time. On the hot plate 2 That the radiation heating efficiency by radiant heat against general workpiece W can be further improved as compared with the prior art.
[0036]
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In the oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the upper heat source 3 is selected so as to arbitrarily select the irradiation region of the upper heat source 3 on the reflecting member 17 of the reflecting mechanism 10. Is provided with uneven baking adjustment mechanisms 20 and 30 such as a sliding mechanism or a rotation mechanism, so that the position and direction of the upper heat source 3 can be easily finely changed to arbitrarily change the irradiation region of the upper heat source 3 to the reflecting member 17. It is possible to adjust, and it is possible to uniformly irradiate the entire workpiece W without causing uneven baking.
[0037]
The baking unevenness adjusting mechanism 20 by the sliding mechanism is fixed to the upper end of the partition wall portion 21 that is erected with a gap having a required width between the inner wall of the oven furnace 1 and the edge of the hot plate 2. Since the fixed base 22 and the plurality of upper heat sources 3 are fixedly arranged with the plurality of upper heat sources 3 being spaced apart from each other and are slidable back and forth on the fixed base 22, the upper heat source is provided. The position of the upper heat source 3 can be easily finely adjusted in the front-rear and horizontal directions so as to arbitrarily change the irradiation area of the reflecting member 17 by 3, and uneven baking or the like occurs on the entire workpiece W. Irradiation can be performed evenly.
[0038]
The baking unevenness adjustment mechanism 30 by the rotation mechanism has a hinge 33 at the upper ends of the left and right partition wall portions 31 that are arranged upright with a gap having a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2. The rotary base 32 is pivotally mounted so as to be rotatable through the base plate and is fixed in a state where a plurality of upper heat sources 3 are spaced apart on one side piece, and the radiant heat diffused and radiated from the reflecting member 17 is brought inward. A flexible partition plate 36 connected and arranged in a plurality of adjacent positions between an edge on one side piece of the rotating base 32 and the ceiling portion inside the oven kiln 1 to reflect the rotating base 32; 32, a rack gear 38 that is screwed so that the teeth are directed outwardly on the inside of the right-angled edge of 32, a drive motor 39 having a pinion gear 39A that meshes with the teeth of the rack gear 38, and the other side piece of the rotary base 32 Projection piece 3 extending at the edge of The upper limit and lower limit limit switches LS1, LS2 arranged on the movement locus of the projection piece 32A so that the stop control of the drive motor 39 is performed by the contact of the projection piece 32A with the rotation of the rotary base 32. Therefore, the irradiation direction of the upper heat source 3 is changed from a substantially horizontal state to a maximum inclined state between 90 ° and 45 °, for example, in order to arbitrarily change the irradiation region of the upper heat source 3 to the reflecting member 17. Fine adjustment can be easily performed, and the entire workpiece W can be irradiated uniformly without causing uneven baking.
[0039]
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In an oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the left and right sides of the hot plate 2 can be opened and closed to finely adjust the heat generated by the convection from the lower heat source 4. Since the convection heat adjustment mechanism 40 having the partition adjustment plate structure is provided, the convection heat due to the radiation from the lower heat source 4 can be easily adjusted, and only the lower part of the heat plate 2 can be prevented from becoming extremely hot. Thus, it can be avoided that only the lower surface of the workpiece W on the hot plate 2 is extremely burnt.
[0040]
The convective heat adjustment mechanism 40 is a fixed base that is erected with a gap of a required width between the inner wall of the oven kiln 1 and the edge of the hot plate 2 and the upper heat source 3 is placed and fixed at the upper end. By forming a gap between the left and right partition wall portions 41 formed by mounting 42 and the support frame 43 erected from the edge of the hot plate 2 located inside the partition wall portion 41, A radiant heat flow path of the lower heat source 4 is formed by this gap so as to induce radiant heat to the upper side of the heat plate 2 after passing through the upper heat source 3 with respect to the lower heat source 4 that directly heats the heat plate 2 from the lower side. The upper end of the support frame 43 provided to face the upper heat source 3 installation side so as to shield the radiant heat from the radiant heat toward the workpiece W side on the hot plate 2 at an arbitrary height. The horizontal plate 46 that can be erected and the radiant heat flux from the lower heat source 4 at the top It is combined with the radiant heat flux of the source 3 to generate convection, so that the heat transfer to the workpiece W side on the hot plate 2 is improved in the horizontal direction via the adjusting screw 44 on the upper end side of the support frame 43. Since the adjustment plate 45 is movably fixed, the adjustment plate 45A can be adjusted by twisting the adjustment screw 44 in the pushing direction when the thermal power is weakened when adjusting the thermal power due to the convection of the lower heat source 4. It can be easily moved in the direction of closing the radiant heat flow path of the lower heat source 4 in the vicinity of the partition wall 41 side on the upper end side of the support frame 43.
[0041]
On the other hand, when the heating power is strengthened, the adjusting plate 45 is moved away from the partition wall 41 on the upper end side of the support frame 43 by the twisting rotation of the adjusting screw 44 in the pulling direction to expand the radiant heat flow path of the lower heat source 4. Can be done easily. Further, the horizontal plate 46 capable of shielding the upper heat source 3 by appropriately changing the installation height with respect to the support frame 43 radiates heat from the upper heat source 3 toward the workpiece W on the heat plate 2. Excessive reaching can be prevented. Thus, by closing or expanding the radiant heat flow path by the adjustment plate 45, changing the installation height of the horizontal plate 46, the radiant heat to the workpiece W to be fired can be evenly dispersed, The burnt of the workpiece W can be prevented. In addition, the convection heat transfer accompanying the merging of the radiant heat flux from the upper and lower heat sources 3 and 4 makes the inside of the oven kiln 1 a convection heat transfer system according to the firing conditions, thereby preventing uneven baking on the workpiece W, etc. can do.
[0042]
The far infrared rays from the upper heat source 3 directed upward with respect to the workpiece W placed on the hot plate 2 in the oven kiln 1 are diffusely reflected by the reflecting mechanism 10 and diffusely radiated and heated on the hot plate 2. In an oven apparatus that performs processing and heats the hot plate 2 itself by the lower heat source 4 disposed below the hot plate 2, the outside air is sent into the oven kiln 1 from the air supply port provided on the rear or left and right sides of the oven kiln 1. Since the heat source cooling mechanism 50 for cooling the back side portions of the upper and lower heat sources 3 and 4 by natural convection is provided, the back side portion of the upper heat source 3 can be efficiently cooled by natural convection behind the upper heat source 3. The life of the upper heat source 3 can be extended.
[0043]
The heat source cooling mechanism 50 includes a bottom surface portion 53 inside the oven kiln 1 having an intake opening 53A for taking in outside air, a side wall portion 54 having a heat insulating material 54A attached inside and a side surface air supply port 54C, The side wall 54 has a gap of a required width and is relatively laid, and a partition wall 51 standing upright in the form of a partition inside the oven kiln 1, and slightly toward the inside of the oven kiln 1 at the upper end of the partition wall 51 A fixed base 52 in which the frame is fixed in an inclined stepped shape and the upper heat source 3 is spaced apart on the upper surface, and a plurality of holes 55A arranged from the outer edge end portion of the fixed base 52 directly upward. A ceiling portion 55 inside the oven kiln 1 provided with a ceiling-side vertical duct portion 55B formed adjacently and a substantially trapezoidal hollow exhaust port 55C communicating with the upper side of the ceiling-side vertical duct portion 55B, and the oven kiln 1 Equipped with an operation panel 56A Since the front wall portion 56 and the rear wall portion 57 having the rear portion air supply port 57A for taking in outside air are provided with the cooling heat exchange chambers P, the side surface portion of the side wall portion 54 is provided. Outside air is taken into the cooling heat exchange chamber P inside the oven kiln 1 through the intake opening 53A of the bottom surface portion 53 from the air supply port 54A, and at the same time, outside air also enters the oven kiln from the back surface air supply port 57A of the back wall portion 57. 1 is taken into the cooling heat exchange chamber P inside, and the portion on the lower surface side of the upper heat source 3 can be efficiently cooled by the outside air taken into the cooling heat exchange chamber P. Further, the warmed outside air can be easily exhausted to the outside from the exhaust port 55C via the ceiling-side vertical duct portion 55B of the ceiling portion 55 while rising. As a result, the back side portions of the upper and lower heat sources 3 and 4 themselves exposed to a high-temperature heating atmosphere can be efficiently cooled by natural convection without using a convection fan device or a cooling device using a refrigerant mechanism. The lifetime of the upper and lower heat sources 3 and 4 itself can be extended.
[0044]
Since the upper and lower heat sources 3 and 4 employ heat source members such as ceramic heaters and infrared schwann burners, the near infrared rays from the upper heat source 3 are diffusely reflected by the reflection mechanism 10 and diffused and radiated onto the heat plate 2 for heat treatment. It is possible to provide an oven apparatus that can enhance the heat storage effect of heating the hot plate 2 itself from below by the near infrared rays from the lower heat source 4 and can be easily maintained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing the inside of an oven kiln of an oven device according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the inside of an oven kiln showing a different form of the tilted state of the upper heat source.
FIG. 3 is a schematic perspective view of the main part of the reflection mechanism.
FIG. 4 is an enlarged perspective view of a main part of a reflecting member in the reflecting mechanism.
FIGS. 5A and 5B show an embodiment of a burning unevenness adjusting mechanism using a sliding mechanism, in which FIG. 5A is a perspective view for explaining a sliding state, and FIG. 5B is a sectional view taken along line XX in FIG.
FIGS. 6A and 6B show an embodiment of a baking unevenness adjustment mechanism using a rotating mechanism when the upper heat source is a ceramic heater. FIG. 6A is a front view showing a state before the rotating operation, and FIG. It is a side view which shows a state.
FIG. 7 is a front view showing the state after the rotation operation.
8A and 8B show a form of a baking unevenness adjustment mechanism using a rotating mechanism when the upper heat source is an infrared schwann burner or a gas burner. FIG. 8A is a front view showing a state before a rotating operation, and FIG. FIG. 6 is a side view showing a state before a rotating operation.
FIG. 9 is a front view showing the state after the rotation operation.
FIG. 10 is a perspective view showing one embodiment of a convection heat adjustment mechanism inside the oven kiln of the oven device.
11 is a cross-sectional view of a portion A in FIG.
FIG. 12 is a perspective view showing one form of a heat source cooling mechanism inside the oven kiln when the upper heat source is a ceramic heater.
FIG. 13 is a perspective view showing one form of a heat source cooling mechanism inside the oven kiln when the upper heat source is an infrared schwann burner or a gas burner.
FIG. 14 is a schematic perspective view of the entire oven apparatus.
[Explanation of symbols]
1 ... Oven kiln 2 ... Hot plate
3 ... Upper heat source 4 ... Lower heat source
10 ... reflection mechanism 11 ... support member
12 ... Adhering piece 13 ... Connecting piece
14 ... Mounting support piece 15 ... Mounting part
16 ... support bar 17 ... reflecting member
18 ... Pipe material for heat storage W ... Workpiece
20: Unevenness adjustment mechanism by sliding mechanism
21 ... partition wall 22 ... fixed base
22A ... Scale scale 23 ... Sliding plate
23A ... Pointer 24 ... Fixing bracket
25 ... Screw hole 26 ... Long hole
27 ... Fixing screw
30 ... Unevenness adjustment mechanism by rotating mechanism
31 ... Partition wall 32 ... Rotating base
32A ... Projection piece 32B ... Pointer
32C ... Scale scale 33 ... Hinges
34 ... Fixing bracket 35 ... Chain member
36 ... Partition plate 37 ... Flange
38 ... Rack gear 39 ... Drive motor
39A ... pinion gear 39B ... flexible tube
LS1 ... Upper limit switch LS2 ... Lower limit switch
40 ... Convection heat adjustment mechanism
41 ... partition wall 41A ... pointer
41B ... Scale scale 42 ... Fixed base
43 ... Support frame 44 ... Adjustment screw
45 ... Adjustment plate 45A ... Horizontal plane
45B ... Vertical surface 45C ... Recess
46 ... Horizontal plate 47 ... Leg
48 ... Insertion groove 48A ... Hole
49. Pin member
50 ... Heat source cooling mechanism
51 ... Partition wall 52 ... Fixed base
53 ... Bottom 53A ... Intake opening
54 ... Side wall 54A ... Insulation
54B ... Side surface air supply port 55 ... Ceiling part
55A ... Hole 55B ... Ceiling side vertical duct
55C ... Exhaust port 56 ... Front wall
56A ... Control panel 57 ... Back wall
57A ... Back side air supply port 58 ... Mixing tube
58A ... Primary air intake P ... Heat exchange chamber for cooling
61 ... Opening / closing door

Claims (4)

  The near infrared rays from the upper heat source directed upward to the workpiece placed on the hot plate in the oven kiln are diffusely reflected by the reflection mechanism and diffused and radiated on the hot plate to perform the heat treatment. In the oven apparatus that heats the hot plate itself by the lower heat source disposed below, the reflection mechanism includes a support bar that is supported along the front and rear of the oven kiln by the support members that are symmetrically arranged in the front and rear of the oven kiln. The reflecting member is supported by being inserted outside the supporting bar, and the reflecting member has a higher thermal conductivity and thermal diffusion than the supporting bar so as to provide high heat storage and high radiation efficiency. It is formed of a pipe material with a high rate, and a heat storage pipe material whose specific heat is smaller than that of the pipe material and whose heat conductivity / thermal diffusivity is larger than that of the pipe material is inserted in the inner peripheral surface. Oven .   The near infrared rays from the upper heat source directed upward to the workpiece placed on the hot plate in the oven kiln are diffusely reflected by the reflection mechanism and diffused and radiated on the hot plate to perform the heat treatment. In the oven apparatus that heats the hot plate itself by the lower heat source disposed below, the upper heat source is provided with a baking unevenness adjusting mechanism by a rotating mechanism so as to arbitrarily select an irradiation region of the upper heat source to the reflecting member of the reflecting mechanism, This rotating unevenness adjustment mechanism by the rotating mechanism is rotated via hinges at the upper ends of the left and right partition walls that are arranged upright with a gap of the required width between the inner wall of the oven kiln and the edge of the hot platen. A rotating base that is pivotally mounted so that it is possible and fixed with a plurality of upper heat sources spaced apart on one side piece, and a rotating base that reflects the radiant heat diffused and radiated from the reflecting member to the inside. On one side A flexible partition plate connected and arranged in a plurality of adjacent positions between the edge portion and the ceiling portion inside the oven kiln, and a tooth portion facing outside on a right side edge portion of the rotating base. A rack gear fixed with screws, a drive motor having a pinion gear meshed with a tooth portion of the rack gear, a protruding piece extending at an edge on the other side piece of the rotating base, and with the rotation of the rotating base An oven apparatus comprising: an upper limit switch and a lower limit switch arranged on a movement trajectory of the projecting piece so as to perform stop control of the drive motor when the projecting piece comes into contact.   The near infrared rays from the upper heat source directed upward to the workpiece placed on the hot plate in the oven kiln are diffusely reflected by the reflection mechanism and diffused and radiated on the hot plate to perform the heat treatment. In the oven device that heats the hot plate itself with the lower heat source arranged below, the left and right sides of the hot plate are equipped with a convection heat adjustment mechanism with a partition adjustment plate structure that can be opened and closed to finely adjust the heat generated by convection from the lower heat source This convective heat adjustment mechanism is a fixed base in which an upper heat source is placed and fixed at the upper end with a gap having a required width between the inner wall of the oven kiln and the edge of the hot plate. By forming a gap between the left and right partition walls formed by mounting and the support frame placed upright from the edge of the heat plate located inside the partition wall, the lower side of the heat plate Pass the upper heat source against the lower heat source that heats directly from In order to induce radiant heat from the heat plate to the upper side of the heat plate, a radiant heat flow path of the lower heat source is formed by this gap, and the radiant heat is shielded so that the radiant heat does not become excessive from the upper heat source toward the workpiece on the heat plate. Convection is achieved by combining a horizontal plate that can be installed at an arbitrary height at the upper end of the support frame provided facing the upper heat source installation side, and the radiant heat flux from the lower heat source with the radiant heat flux of the upper heat source. It is composed of an adjustment plate that can be fixed to the upper end side of the support frame so as to be movable in the horizontal direction via an adjustment screw so as to improve heat transfer to the workpiece side on the hot plate. Oven device.   The oven device according to any one of claims 1 to 3, wherein the upper and lower heat sources employ a heat source member such as a ceramic heater or an infrared Schwann burner.

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