JP7295382B2 - Toaster oven - Google Patents

Description

The present invention relates to a toaster oven, and more particularly to a toaster oven in which the heat insulation between the heating chamber and the front side of the door is improved so that the heat in the heating chamber is less likely to be transmitted to the front side of the door.

A toaster oven is equipped with a cooking net for placing an object to be cooked, such as bread, in a heating chamber. Heats and cooks the food to be cooked. Because it is an oven shape with a cooking net placed in the heating chamber, compared to a pop-up toaster, it can be used to place bread with ingredients such as pizza toast as it is, bake rice cakes, pizza, gratin, etc. It is possible to add grill marks to the surface of the food to be cooked. In addition, it is possible to cook various menus other than toasting bread, such as placing a metal cooking plate on which the food to be cooked is placed on the cooking net.

In such an oven toaster, a part of the door provided in front of the heating chamber for taking in and out the food to be cooked is made of glass so that it is possible to check the doneness of the food to be cooked in the heating chamber. . On the other hand, the side wall, back wall, top surface, and other wall parts that make up the heating chamber are galvanized with galvalume steel plate (registered trademark) so that the radiant heat from the heater can be reflected and distributed throughout the heating chamber. A steel plate is used. In contrast to these walls, the front of the heating chamber is a door with glass that easily transmits radiant heat, so the temperature of the food placed in front of the cooking net does not rise easily. There was a problem that unevenness occurs.

In such a toaster oven having a glass window on the front door, a plurality of plate-shaped shielding plates are inclined so that the rear side of the main surface is downward on the inner part of the glass window of the door, and A configuration in which they are arranged at small intervals has been proposed (see Patent Document 1).

JP-A-2000-51094

In the conventional oven toaster described above, since the shielding plate whose main surface is formed obliquely downward is arranged on the inner surface of the transparent window of the door, the radiant heat from the heater arranged in the upper part of the heating chamber is particularly prevented from entering the inside of the heating chamber. It is possible to reduce the grilling unevenness of the front end portion of the cooking net. In addition, by arranging a plurality of shielding plates in parallel at predetermined intervals, the user can check the cooking condition of the food in the heating chamber through the shielding plates whose main surfaces are inclined downward.

However, in the conventional oven toaster, the structure of the door is complicated because a mechanism for attaching the shielding plate to the back side of the glass window is required. The range that can confirm the state of is also limited.

Furthermore, the conventional toaster oven does not have the technical concept of preventing the heat in the heating chamber from being transferred to the front of the door through the window.

The present disclosure is intended to solve such problems in conventional toaster ovens. Although it has a simple configuration, it is possible to easily check the state of the heating chamber through the window and heat the inside of the heating chamber through the glass portion of the door. To obtain a toaster oven capable of effectively preventing transmission of heat to the outside.

In order to solve the above problems, the toaster oven of the present disclosure includes a heating chamber, a door that can be opened and closed covering the front surface of the heating chamber, a cooking net on which the food to be cooked is placed in the heating chamber, and the At least one of an upper heater arranged above the cooking net in the heating chamber and a lower heater arranged below the cooking net in the heating chamber, and the door is located on the front side. a first glass placed on the side of the heating chamber; The space in the door formed between the glass of 2 is connected to the outside through the opening.

In the toaster oven of the present disclosure, the door covering the front of the heating chamber has a double glass configuration with two glasses, the first glass and the second glass, formed on the bottom and sides of the door The space inside the door is connected to the outside through the opening. As a result, outside air flows into the space inside the door, and heat transfer to the front of the door through the glass can be effectively suppressed.

It is a perspective view showing the appearance of the toaster oven according to the present embodiment. It is a perspective view showing the state where the door of the toaster oven according to the present embodiment is opened. It is sectional drawing which cut|disconnected the heating chamber in the front-back direction explaining the internal structure of the toaster oven concerning this embodiment. It is an image diagram explaining the structure of the door of the oven toaster according to the present embodiment. Fig. 2 is an enlarged cross-sectional view of a main part for explaining the structure of the door of the toaster oven according to the present embodiment; It is an exploded perspective view explaining the composition of the door of the oven toaster concerning this embodiment. FIG. 4 is an enlarged image diagram of a main part for explaining the structure of the lower portion of the door; FIG. 4 is an enlarged side view of a main part for explaining the shape of the side surface of the door; FIG. 4 is an enlarged cross-sectional view of a main part showing the shape of the vicinity of an opening formed on the side surface of the door; It is a figure comparing the degree of heat conduction to the cup placed in front of the door in the toaster oven of the present embodiment and the toaster oven of the comparative example. It is a figure which shows the temperature change in a heating chamber in the toaster oven of this embodiment, and the toaster oven of a comparative example. It is a figure which shows the state of the upper surface of the toast in the toaster oven of this embodiment, and the toaster oven of a comparative example. It is a figure which shows the state of the lower surface of the toast in the toaster oven of this embodiment, and the toaster oven of a comparative example. It is a figure which shows the state of the surface of the quiche style toast in the toaster oven of this embodiment, and the toaster oven of a comparative example. FIG. 4 is a diagram showing temperature changes inside cheese of quiche-style toast in the toaster oven of the present embodiment and the toaster oven of the comparative example. FIG. 4 is a diagram showing the moisture attenuation rate of bread before and after toasting in the toaster oven of the present embodiment and the toaster oven of the comparative example.

The toaster oven of the present disclosure includes a heating chamber, a door that can be opened and closed covering the front surface of the heating chamber, a cooking net placed in the heating chamber on which an object to be cooked is placed, and the cooking net in the heating chamber. and at least one of an upper heater arranged above the cooking net in the heating chamber and a lower heater arranged below the cooking net, and the door is arranged on the front side of the first and a second glass disposed on the heating chamber side, openings are formed in the bottom surface of the door and the side surface of the door, and between the first glass and the second glass The space in the door formed in the above is connected to the outside through the opening.

With the above configuration, the toaster oven of the present disclosure allows external low-temperature air to flow into the space inside the door, so that heat transfer in the heating chamber through the glass portion of the door can be effectively prevented. can. In addition, the use of a double-glazed door can effectively prevent the heat and steam in the heating chamber from leaking to the outside.

In the toaster oven according to the present disclosure, it is preferable that the opening formed in the side surface of the door is positioned above the vertical center of the side surface. By doing so, the natural convection of the warmed air in the space inside the door creates a flow of air that flows in through the opening formed in the bottom and out of the opening formed in the side, creating a space inside the door. can be maintained at a low temperature.

Moreover, it is preferable that a plurality of the openings arranged in the vertical direction be formed in the side surface of the door. By doing so, the path of the air flowing out from the space inside the door to the outside becomes large, and the amount of air circulation between the space inside the door and the outside increases.

Further, in the door, a holding member that abuts on the back side near the lower end of the first glass to hold the first glass has a plurality of protrusions that protrude to the front side, It is preferable that the rear surface of the glass abuts on the tip of the protrusion. By doing so, the air that has flowed in from the opening in the bottom surface can easily enter between the two glass members, and the temperature of the space inside the door can be effectively lowered.

Furthermore, in the toaster oven according to the present disclosure, the second glass has a smaller area than the first glass, and the lower end of the second glass is positioned above the cooking net. is preferred. In this way, the escape of heat from the heating chamber is suppressed, and the heat from the lower heater is reflected to the cooking net side, thereby reducing temperature unevenness in the heating chamber.

Moreover, it is preferable that the second glass is arranged at a position protruding from the surface of the door on the heating chamber side toward the heating chamber. By doing so, it is possible to increase the space inside the door to improve the heat insulating effect, and to limit the route through which heat and moisture escape from the heating chamber.

(Embodiment)
Hereinafter, the toaster oven disclosed in the present application will be described using specific embodiments.

FIG. 1 is a perspective view showing the appearance of a toaster oven according to this embodiment.

The toaster oven 100 of the present embodiment, as shown in FIG. A door 20 that can be opened and closed to cover the front surface of a heating chamber 50 formed in the housing 10 , and an operation unit 30 arranged below the door 20 on the front surface of the housing 10 .

In addition, in the following description, the toaster oven is placed on a table such as a table as a normal use state, and based on the direction viewed from the user facing the door, front and back, left and right, and top and bottom of the toaster oven. Directions are defined, and the arrangement of each member constituting the toaster oven will be described using each of these directions as appropriate. Specifically, in the perspective view shown in FIG. 1, the front left side of the drawing is the front side of the toaster oven, and the back right side of the drawing is the rear side of the toaster oven. Further, the left-right direction in FIG. 1 is the left-right direction of the toaster oven, and the up-down direction in FIG. 1 is the up-down direction of the toaster oven. Further, in the description of the door, the front side of the door, ie, the surface facing the user, may be referred to as the front surface of the door, and the rear side of the door, ie, the surface facing the heating chamber, may be referred to as the rear surface of the door.

In the toaster oven 100 of this embodiment, a tray 11 (see FIG. 3) for receiving bread crumbs spilled in the heating chamber is arranged below the housing 10 . The tray 11 can be removed by pulling it forward. Further, on the lower surface of the housing 10, legs 12 are formed for placing the toaster oven 100 on a table or other mounting base.

In the toaster oven 100 of the present embodiment, the door 20 can be opened by tilting the handle 21 arranged at the upper end portion of the front face downward (see arrow A in FIG. 2).

The left and right end portions of the lower portion of the door 20 are connecting portions 22 extending downward, and the leading end portion (lower end portion) of the connecting portion 22 is provided with a hinge mechanism 23 (see FIG. 3) for connecting the housing 10 and the door 20. ) are provided. The central portion of the door 20 sandwiched between the pair of connection portions 22 is notched, and as shown in FIG. The operation unit 30 is exposed so that the user can easily operate it.

In the toaster oven 100 according to the present embodiment, considering the design, almost the entire front surface of the door 20 except for the connection part 22 is composed of the outer glass 26 as the first glass made of transparent plate glass. ing.

An opening penetrating through the door 20 is formed in the central portion of the door 20 excluding the peripheral portion. Further, as shown in FIGS. 2 and 3, an inner glass 27 as a second glass, which is a transparent plate-like member, is also arranged on the heating chamber side of the opening formed in the door 20 . With this configuration, the user can see the food inside the heating chamber 50 even when the door 20 is closed, through the outer glass 26 on the front side of the door 20, the opening, and the inner glass 27 on the back side. status can be grasped. Note that the configuration of the door 20 will be described later in detail with reference to FIG. 4 and subsequent drawings.

The operation unit 30 includes a plurality of operation dials 31 for setting and adjusting the heating time and heating temperature, various operation buttons (not shown), and the like. In the example shown in FIG. 1, two operation dials 31 are arranged in the operation unit 30, but the number and locations of arrangement of the operation dials 31 and operation buttons are shown in FIG. It is not limited to what is shown, and should be arranged in accordance with the cooking menus that can be cooked with the toaster oven 100, and in consideration of the necessary number of necessary items and the design aspect. In addition, the operation unit 30 may be provided with a display panel using a liquid crystal panel or the like for displaying the setting state of the cooking menu and various operating states of the oven toaster 100, and various notification lamps such as an LED lamp. can be done.

Further, as the toaster oven 100 of the present embodiment, the operation unit 30 is provided on the lower front surface of the housing 10 and the operation unit 30 is exposed to the front when the door 20 is closed. 30 is not limited to the one shown in the example. For example, the door can cover the entire front side of the heating chamber, and the operation part can be arranged below the window formed in the door, or any peripheral part including the left and right sides and the upper side. . In addition, the center of the heating chamber in the horizontal direction is eccentrically placed in either the left or right direction with respect to the center of the housing in the horizontal direction, and the position of the heating chamber is shifted in the horizontal direction. It is possible to adopt a configuration in which the operation part is arranged on the front surface of the gap between the two. Furthermore, regardless of the position of the operation unit, it is possible to arrange some of the operation buttons and the like arranged on the operation unit on a portion other than the front side of the toaster oven, such as the top surface or the side surface of the housing.

FIG. 2 is a perspective view showing a state in which the door of the toaster oven according to the present embodiment is opened.

In the toaster oven 100 of this embodiment, the tip portions of the connecting portions 22 formed at the left and right ends of the lower side of the door 20 and the lower ends of the left and right ends of the front surface of the housing 10 are connected by a hinge mechanism 23. When the user pulls down the handle 21, the door 20 is opened by rotating in the direction indicated by the arrow A in FIG.

The toaster oven 100 of this embodiment is designed so that the user can pull out the cooking net 41 arranged inside the heating chamber 50 with the door 20 open. Also, a cooking plate 42 used for cooking a dish-shaped container such as gratin can be placed on the cooking net 41 .

A hook member that can be connected to the tip of the cooking net 41 is arranged on the back surface of the door 20 so that the cooking net 41 can be pulled out at the same time as the door 20 is opened. It is also possible to make it easier to place bread or a cooking plate 42, which is an object to be cooked, on the plate 41. FIG.

In the toaster oven 100 according to the present embodiment, a support portion 24 that supports the door 20 when the door 20 is opened and closed is formed on the back surface of each of the pair of left and right connection portions 22 of the door 20, and the door 20 is formed at the end of the support portion 24. is closed, the end portion (the end portion on the door 20 side) of the movable portion 25 accommodated in the housing 10 is rotatably connected. The movable part 25 is arranged so as to be slidable in the front-rear direction between the side wall of the heating chamber 50 and the side wall of the housing 10, so that the door 20 can be smoothly opened and closed. As described above, in the toaster oven 100 according to the present embodiment, the support portion 24 and the movable portion 25 constitute the opening/closing mechanism of the door 20, but the opening/closing mechanism of the door 20 is limited to the shape shown in FIG. Instead, the door 20 can be of various shapes that can be smoothly rotated around the hinge mechanism 23 to open the front surface of the heating chamber 50 .

The cooking net 41 can be of various types, such as one in which a frame as a skeleton and a mesh portion on which the food to be cooked is placed are integrally formed, or one in which the mesh is detachably attached to the skeleton. morphology can be adopted. The cooking plate 42 is made of an aluminized steel plate or the like, and has a substantially rectangular shape with relatively low side walls.

FIG. 3 is a cross-sectional view showing the internal configuration of the toaster oven of this embodiment. FIG. 3 shows a cross-section of the toaster oven according to the present embodiment at the central position in the left-right direction as viewed from the right side.

As shown in FIG. 3 , when the door 20 is closed, the cooking net 41 is positioned substantially entirely in the front-rear direction inside the heating chamber 50 .

In the toaster oven 100 according to this embodiment, the upper heater 51 is arranged above the central portion in the front-rear direction of the cooking net 41 housed inside the heating chamber 50 . A first lower heater 52 located on the front side of the heating chamber 50 and a second lower heater 53 located on the rear side of the heating chamber 50 are arranged below the cooking net 41 of the heating chamber 50 . It is configured with two lower heaters.

As the upper heater 51 used in the oven toaster, for example, a quartz tube heater with an outer diameter of Φ12 mm, a length of 315 mm, and a rated power of 610 W can be used. As the first lower heater 52 and the second lower heater 53, for example, quartz tube heaters having an outer diameter of Φ12 mm, a length of 315 mm, and a rated power of 345 W can be used. As the heater used in the toaster oven of the present embodiment, various heaters such as a sheathed heater of about 600 W to 700 W can be used in addition to the heaters described above.

In the toaster oven of this embodiment, the three heaters 51, 52, and 53 are arranged in the heating chamber 50 so as to extend in the horizontal direction of the toaster oven. Here, the three heaters 51, 52, and 53 are arranged so that both ends of each heater are substantially equal in the front and rear positions and the vertical positions in the heating chamber 50 of the toaster oven, that is, manufacturing errors are eliminated. It is arranged so as to maintain an exactly horizontal state and to face the right and left direction exactly. In order to heat the food placed on the cooking net 41 as evenly as possible, three heaters 51, 52 and 53 appearing in the sectional view of FIG. It is arranged so that the central portion of the net 41 in the front-rear direction is positioned.

The heating chamber 50 includes an upper wall 54 forming the upper surface, a rear wall 55 forming the rear facing the door 20, a bottom 56 forming the lower surface facing the upper wall 54, the upper wall 54, the rear wall 55, A pair of mutually opposed side walls 57 (left side 57a and right side 57b) forming left and right side surfaces continuously from the bottom surface 56 surround the bottom surface 56. As shown in FIG. 3, only the left side wall 57a of the heating chamber 50 is visible. The upper side of the front opening of the heating chamber 50 is covered with the rear surface of the door 20 .

In the toaster oven of this embodiment, a top wall 54 and a bottom wall 56 are arranged horizontally, and a side wall 57 is arranged vertically, both of which are substantially flat surfaces. On the other hand, the rear wall 55 includes an intermediate portion 55a near the rear end portion of the cooking net, an upper portion 55b located above the intermediate portion 55a and having the main surface directed obliquely downward, and a portion 55b which is located above the intermediate portion 55a and has a main surface facing diagonally downward. It is composed of three parts, ie, a lower part 55c positioned below and having its main surface directed obliquely upward.

In this manner, the upper portion 55b of the rear wall 55 is formed as an inclined surface with the main surface facing downward, so that the radiant heat from the upper heater 51 can be reflected toward the food on the cooking net 41 to be cooked. . In addition, by forming the lower portion 55c of the rear wall 55 as an inclined surface with the main surface facing upward, the radiant heat from the second lower heater 53 arranged on the rear side in particular is transferred to the food to be cooked on the cooking net 41. Can be reflected at objects. As a result, the food to be cooked can be heated more evenly, and the cooking time can be shortened. For example, when toasting a plurality of pieces of toast, it is possible to prevent uneven cooking from occurring depending on the placement position on the cooking net 41. can be effectively reduced.

Incidentally, as shown in FIG. 3, by making a part of the rear wall 55, particularly the upper wall 54 side, a sloped surface 55b, the height of the space in the heating chamber 50 on the back side (back side) becomes smaller. , the height of the food placed directly on the cooking net 41 or placed via the cooking plate 42 is limited. Therefore, the height of the vertical portion 55a of the back wall 55, the inclination angle of the upper portion 55b and the lower portion 55c, and the like are appropriately set in consideration of the size required for the heating chamber 50 as the cooking space. Should. In addition, unlike the toaster oven 100 of the present embodiment, in which the upper and lower inclined surfaces 55b and 55c are provided, the rear wall 55 is formed as a substantially vertical surface, so that the capacity of the heating chamber 50 can be sufficiently increased. It is also possible to make a design that gives priority to ensuring that

In the toaster oven 100 according to the present embodiment, as shown in FIG. 3, an upper surface protrusion 58 having a substantially triangular cross section is provided near the front end of the upper surface wall 54 on the front side of the portion where the upper heater 51 is arranged. It is formed with two vertices directed downward and extending in the left-right direction. Since the upper surface protrusion 58 has the purpose of making the upper heater 51 invisible through the front door 20, the upper surface wall 54 has a height that can cover the upper heater 51 when viewed from the front side. It is formed so as to protrude downward from the surface. In addition, by providing an upper surface projection 58 having an inclined surface facing the upper heater 51 in front of the upper heater 51 , the radiant heat radiated forward from the upper heater 51 is reflected and placed on the cooking net 41 . It can be directed to the side of the food to be cooked.

Furthermore, in the toaster oven of the present embodiment, in the heating chamber 50 in front of the first lower heater 52, there is provided an operating unit isolation device for separating the operating unit 30 arranged on the lower side of the housing 10 from the heating chamber 50. A plate 59 is arranged. In the toaster oven of this embodiment, a circuit board 32 on which a switch circuit connected to the operation dial 31 of the operation unit 30 and a control circuit for controlling the entire toaster oven such as heater ON/OFF control is mounted. are arranged in the circuit board arrangement area on the back side of the operation unit 30 . The operation part isolation plate 59 is designed so that the heat in the heating chamber 50, especially the heat from the first lower heater 52 arranged at the nearest position, is transferred to the timer or the like on the circuit board 32 arranged in the circuit board arrangement area. In order to avoid adversely affecting other electronic components and the like, it is preferably formed of a member having high heat reflection characteristics.

Further, in the toaster oven of this embodiment, a curved reflecting plate 28 is arranged on the lower back side of the door 20 . As shown in FIG. 3, the reflector 28 reflects radiant heat from the first lower heater 52 toward the food placed on the cooking net 41 during cooking with the door 20 closed. , functions to radiate sufficient radiant heat to the back surface (the surface arranged on the lower side) of the food to be cooked in the portion near the door 20. - 特許庁Although not shown, the reflector 28 is drawn forward as the door 20 rotates when the door 20 is open, and reaches a position covering the upper and front portions of the operation unit 30 . In this way, when the door 20 is open, the reflector 28 functions as a cover member for preventing the food to be cooked placed on the cooking net 41 from spilling and soiling the operation unit 30 . can be done.

The configuration of each wall surface portion (54 to 57) forming the outer shell of the heating chamber 50 described with reference to FIG. 3 is merely an example. For example, it is not an essential requirement to form the upper projection 58 having a substantially triangular prism-shaped cross section on the front side of the upper wall 54 . In addition, an inclined surface is further formed between the rear side portion of the upper surface wall 54 and the portion connected to the upper portion 55b of the rear wall 55, and a plurality of inclinations of two or more steps are formed from the upper surface wall 54 to the rear wall 55. It can be configured such that a surface is formed. Furthermore, the rear side portion of the upper surface wall 54 can be formed with a curved surface convex rearward and upward. Furthermore, instead of forming the substantially triangular prism-shaped upper surface protrusion 58 on the front side of the upper surface wall 54, an inclined surface toward the front side similar to the rear side can be arranged. Further, the operation section separating plate 59 and the reflecting plate 28 described in the above embodiment are not necessarily essential constituent members, and may be appropriately arranged as required.

In the toaster oven 100 of the present embodiment, the top wall 54, the back wall 55, the bottom wall 56, and the side walls 57 forming the periphery of the heating chamber 50 are made of galvalume steel plates having high heat reflection characteristics. The heat from the heater 51 and the lower heaters 52 and 53 can efficiently heat the food to be cooked. In addition to the Galvalume steel plate, various steel plates with high heat reflection properties, such as aluminum-plated Ulster steel plate and galvanized steel plate with high rigidity, can be used as materials for forming each wall surface of the heating chamber 50 . can be used. Also, the same material as the wall surface, such as a galvalume steel plate, can be preferably used for the operation portion partition plate 59 that reduces heat transfer to the circuit board arrangement area.

Under the bottom surface 56, the tray 11 having a flat surface large enough to cover the opening formed in the bottom surface 56 is arranged. A user can pull out the tray 11 to the front side by putting a finger on the handle part 11a arranged at the lower part of the door 20 on the front side of the tray 11, and further pull out the tray 11 to remove the bread crumbs accumulated inside the tray 11.例文帳に追加and water can be easily discarded.

Next, the configuration of the door arranged to cover the front side of the heating chamber in the toaster oven according to the present embodiment will be described in more detail.

FIG. 4 is an image diagram illustrating the configuration of the door of the toaster oven according to the present embodiment. FIG. 4 is a diagram showing a cross section of the toaster oven according to the present embodiment at an intermediate portion in the left-right direction as obliquely viewed from the front right, and is an enlarged image diagram showing the main part by enlarging the door portion.

FIG. 5 is a cross-sectional view illustrating the configuration of the door of the toaster oven according to this embodiment. FIG. 5 is an enlarged view of a main portion centered on the door portion of the cross section at the middle position in the left-right direction of the door.

FIG. 6 is an exploded perspective view showing the shape and positional relationship of main members constituting the door of the toaster oven according to the present embodiment.

In the following description of the door 20, as shown in FIGS. 1 and 3, the closed state in which the door 20 covers the front of the heating chamber 50 is used as a reference, and the vertical direction of the door 20 is the toaster oven. Description will be made assuming that it corresponds to the vertical direction of 100 .

As shown in FIGS. 4, 5, and 6, the door 20 of the toaster oven 100 according to the present embodiment is formed in a substantially plate shape having a predetermined thickness as a whole. a main plate 20a that constitutes a door 20, an upper front surface and left and right side surfaces of the door 20 that are arranged above the door 20, and an upper cover 20b that covers the upper surface of the door 20; Between the lower plate 20c that forms the lower surface of the 20 and supports the outer glass 26 and the front portion is folded back to hold the outer glass 26 from the front, the main plate 20a, the upper cover 20b, and the lower plate 20c, the outer glass 26 and a glass retainer 20d for holding the inner glass 27. As shown in FIG. In FIG. 4, the main plate 20a, the upper cover 20b, the lower plate 20c, and the glass retainer 20d constituting the door 20 are colored in different shades so that the shape of each member can be easily understood.

In the toaster oven 100 according to this embodiment, tempered glass having a length of 123 mm, a width of 373 mm, and a thickness of 3 mm is used as the outer glass 26 . As described above, in the toaster oven of this embodiment, most of the front surface of the door 20 is occupied by the outer glass 26 to enhance the design of the toaster oven as a whole. As the inner glass 27, transparent glass having a smaller area than the outer glass and having a length of 73 mm, a width of 297 mm, and a thickness of 3 mm is used. Note that the size and material of the outer glass 26 and the inner glass 27 are only examples, and the design of the door 20, the light transmittance that allows good visibility of the state of the food to be cooked inside the heating chamber 50, the heat resistance, etc. Needless to say, it can be selected as appropriate.

The main plate 20a includes a frame-shaped portion having an opening in the center and covering the front of the heating chamber, and a pair of connecting portions 22 continuously formed at both left and right ends of the lower end of the frame-shaped portion and extending downward. It is a plate-shaped member that forms the rear surface of the door 20 and has a portion that forms the rear surface. In the toaster oven 100 according to the present embodiment, since the inner glass 27 is arranged in the heating chamber 50, the peripheral portion 20a1 of the opening of the main plate 20a is formed to protrude toward the rear side. . The main plate 20 a also has a pair of bent portions 20 a 2 that are bent forward from both left and right ends of the plate.

A pair of left and right connection section covers 22a forming the front surface of the connection section 22 are attached to the connection section 22 portion of the main plate 20a (see FIG. 6).

The upper cover 20b is arranged on the upper part of the door 20 when it is closed, and comprises a front part 20b1 constituting the upper part of the front surface of the door 20 and the upper surface of the door 20 by folding backward from the upper end part of this front part. It has an upper folded portion 20b2 and side folded portions 20b3 that are folded back from both left and right ends of the front portion to constitute upper ends of both left and right sides of the door 20.例文帳に追加In the toaster oven 100 of the present embodiment, the upper cover 20b is arranged in a place where it is easily visible to the user, so that it is colored with a conspicuous color such as white to improve the appearance of the upper cover 20b. , to hold the upper end of the outer glass 26 arranged in front of the door 20 from the front. Further, the upper cover 20b is arranged at a place where the handle 21 is attached above the door 20, and is a member that is bent at approximately 90 degrees so as to cover the front surface and the upper surface of the door 20. The handle 21 attachment portion of the door 20 It also acts as a reinforcing member that increases the strength of the

The lower plate 20c covers the bottom surface of the door 20 other than the connecting portion 22, and includes a bottom surface portion 20c1 that protrudes toward the front side of the door 20 and supports the bottom portion of the outer glass 26, and a front end of the bottom surface portion 20c1 that is folded back upward. It is composed of a front holding portion 20c2 that holds the front surface of the outer glass 26 and a rear folding portion 20c3 that folds upward from the rear end of the bottom portion 20c1 to form the rear side of the lower portion of the door 20. - 特許庁As shown in FIGS. 4 and 5, the upper end portion of the front holding portion 20c1 is further folded back so that the outer glass 26 can be held more securely between it and the later-described glass holder 20d. It is possible.

The glass retainer 20d is formed by protruding to the rear side of the main plate 20a and a first plane 20d1 that holds the outer glass 26 between the rear surface of the front portion of the upper cover 20b and the front holding portion of the lower plate 20c. and a second plane 20d2 that holds the inner glass 27 between itself and the front surface near the opening. In the toaster oven 100 according to this embodiment, the door 20 includes an outer glass 26 and an inner glass 27 on the heating chamber side, and a cavity 60 is formed between the two glasses. Therefore, the first plane 20d1 of the glass retainer 20d in contact with the back side of the outer glass 26, that is, the front surface of the glass retainer 20d when the door 20 is closed, and the second plane 20d1 in contact with the front side of the inner glass 27 The flat surface 20d2, that is, the rear surface of the glass retainer 20d forms two surfaces that are substantially parallel to each other with a predetermined gap therebetween.

Further, as described above, since the inner glass 27 has a smaller area than the outer glass 26, the second plane 20d2 of the glass retainer 20d is formed smaller than the first plane 20d1. The glass presser 20d of the toaster oven 100 according to this embodiment connects the second plane 20d2 and the first plane 20d1 with a continuous inclined plane 20d3, and when the user looks at the door 20 from the front, the door 20 The inner glass 27, which is located at a position set back from the front of the heating chamber 50 and has a small area, can be seen without discomfort, and the entire door 20 is designed to be recognized as a window through which the inside of the heating chamber 50 can be visually recognized. .

In the toaster oven 100 according to the present embodiment, on the surface of the first plane 20d1 of the glass presser 20d, there are a plurality of approximately truncated pyramid-shaped protrusions 20d4 whose tip is formed as a plane with a smaller area than the base. By contacting the back side of the outer glass 26 with a small area plane at the tip of the protrusion 20d4, the gap between the back side of the outer glass 26 and the first plane 20d1 of the glass retainer 20d is A predetermined gap is formed. Since it is preferable that the protrusions 20d4 come into contact with the back surface of the outer glass 26 so that force is applied evenly, they are arranged at predetermined intervals on each side of the first plane 20d1 of the rectangular frame-shaped glass presser 20d. ing. In the example shown in FIG. 6, on the upper and lower long sides of the first plane 20d1 configured in a rectangular frame shape, there are three each at positions slightly closer to the center, and on the left and right short sides, at the upper and lower ends. A total of 10 protrusions 20d4, two of each of which is located near a certain corner, are arranged.

Note that FIG. 5 shows an example in which the protrusions 20d4 having the same shape are formed on the first plane 20d1 of the glass retainer 20d, but the shapes of the protrusions 20d4, particularly the areas of the planes of the tips, are made different. This makes it possible to adjust the degree to which the temperature of the glass retainer 20d, which has become high due to heat transfer from the inner glass 27, is transferred to the outer glass. For example, among the protrusions 20d4 shown in FIG. By increasing the temperature of only the corner portions, which are the left and right lower ends of the glass 26, it is possible to prevent the corner portions from fogging up during cooking. Similarly, by narrowing the arrangement interval of the projections 40d4 or by additionally arranging the projections 20d4 in a specific portion, the number of projections 40d4 formed per unit length is increased, thereby It can be adjusted so that only the part is warmer.

In the toaster oven 100 according to the present embodiment, the protrusion 20d4 like the first plane 20d1 is not formed on the second plane 20d2 of the glass retainer 20d. The whole is configured to contact the front side of the inner glass.

In the toaster oven 100 according to the present embodiment, the space between the main plate 20a and the inner glass 27 that constitute the back surface of the door 20 and the upper cover 20b, the lower plate 20c that constitute the front surface of the door 20, and the outer glass 26 are , a glass retainer 20d for holding two glasses, a boss 29 for fixing a handle 21, and other constituent members of the door 20, and a hollow space 60 in which other members do not exist. The hollow space 60 inside the door 20 includes a slit 61 formed in the side surface of the door 20 shown in FIGS. ), it is connected to the external space, that is, the space around the toaster oven 100 .

Further, in the toaster oven disclosed in the present application, the inner glass 27, which is the second glass, is arranged on the back of the door 20, so that the opening of the heating chamber 50 is blocked in front of the heating chamber 50. is very close to the heating chamber 50 . In particular, the door 20 of the toaster oven 100 of the present embodiment, whose detailed configuration is shown in FIGS. In addition, the rear surface of the door 20 is formed as a curved surface connecting the projecting portion and the peripheral portion.

The protrusion amount (retraction amount) of the inner glass 27 in the oven toaster according to the present embodiment, which is shown as width B in FIG. 5, is set to 7.3 mm as an example. In this way, by projecting the inner glass 27 rearward and entering the heating chamber 50 with the door 20 closed, the space 60 inside the door 20 is maintained without increasing the thickness of the door 20. can expand the volume of Therefore, the heat insulating effect of the air existing in the space inside the door 20 is improved.

The rearward projection amount of the inner glass 27 is a range that does not come into contact with the front end of the cooking net 41 that is positioned most forward among the members inside the heating chamber 50 if the configuration inside the heating chamber 50 is not changed. is the limit. However, considering that the cooking net 41 is drawn forward as appropriate when used, it is necessary to secure a certain degree of margin. Further, when the amount of rearward projection of the inner glass increases, at least the main plate 20a and the glass retainer 20d among the members constituting the door 20 become large, leading to an increase in the weight of the door 20. If the weight of the door 20 increases, the door 20 may fall open due to its own weight when the user half-opens the door 20 during use. If the door 20 opens in a state unexpected by the user, the door 20 may come into contact with tableware such as a cup placed in front of the toaster oven, or the door 20 may come into contact with the user's hand when the temperature of the door 20 is high. There is a risk of unforeseen circumstances such as For this reason, it is preferable to keep the door 20 within a range where it cannot be opened by its own weight. From these points of view, in this embodiment, as described above, the amount of rearward protrusion of the inner glass 27 is set to 7.3 mm. At this time, the distance between the front surface of the outer glass 26 and the rear surface of the inner glass 27 is 23 mm. Also, as a guideline, three gratin dishes can be placed on the cooking plate 42, and the gap (tolerance) between the front end portion of the cooking net 41 shown as width C in FIG. 5 is set to 5 mm.

Further, as shown in FIG. 5 , in the toaster oven of this embodiment, the lower end of the inner glass 27 is positioned above the cooking net 41 . By doing so, the lower part of the inner glass 27 is composed of the metal main plate 20a, so that the heat from the lower heater, particularly the first lower heater 52 positioned in front of the heating chamber 50, is reduced. The radiant heat can be reflected in the direction of the food placed on the cooking net 41 , and the heat can be effectively transferred to the food placed in front of the placing net 41 . At the same time, by reducing the area of the inner glass 27, the heat transfer of the radiant heat from the heaters 51 to 53 in the heating chamber to the space 60 inside the door 20 is reduced, and the space 60 inside the door 20 and furthermore, the outer glass 26 temperature rise can be suppressed.

Next, in the toaster oven 100 according to the present embodiment, a configuration for communicating the space 60 inside the door 20 with the space outside the toaster oven will be described in detail.

FIG. 7 is an enlarged cross-sectional view of the main part for explaining the structure of the lower part of the door. In addition, hatching of each member is omitted in FIG. 7 in order to avoid complication of drawing.

As described above, in the toaster oven 100 according to the present embodiment, the bottom portion 20c1 of the lower plate 20c connected to the lower end portion of the main plate 20a constituting the outer shell of the door 20 supports the bottom portion of the outer glass 26 (more More precisely, a glass supporting member (not shown) abuts the bottom surface of the outer glass 26), the rearward folded portion of the front holding portion 20c2 folded upward from the front end of the bottom portion 20c1, and the front side of the glass retainer 20d. The outer glass 26 is sandwiched and held between the first flat surface 20d1 located at . In the toaster oven 100 of the present embodiment, a plurality of holes 62 as openings formed in the bottom surface of the door 20 are formed in the bottom surface portion 20c1 of the lower plate 20c that constitutes the bottom surface of the door. A space 60 inside the door 20 formed between the door 20 and the inner glass 27 communicates with a space outside the toaster oven 100 .

7 shows an example in which a plurality of elongated holes 62 are formed in the front-rear direction, but the holes may extend in the left-right direction so that the outside air can pass through the lower surface of the door 20 in a good space. There are no restrictions on the shape or number of holes as long as they are configured to flow into 60 .

Further, in the toaster oven according to the present embodiment, a predetermined gap is formed between the lower plate 20c constituting the lower surface of the door 20 and the upper surface of the operation unit 30 arranged at the lower front surface of the toaster oven 100. Therefore, it does not prevent outside air from flowing into the space 60 inside the door 20 through the hole 62 .

Further, as described above, the upper surfaces of the substantially truncated pyramid-shaped protrusions 20d4, which are formed in plurality on the first plane 20d1 of the glass retainer 20d, abut against the rear surface of the outer glass 26. A gap d corresponding to the height of the protrusion 20d4 is formed between the glass retainer 20d and the first plane 20d1.

As shown in FIG. 7, in the toaster oven 100 according to the present embodiment, the hole 62 formed in the bottom surface portion 20c1 of the lower plate 20c is located between the rear surface of the outer glass 26 and the first plane 20d1 of the glass retainer 20d. By being arranged at a position corresponding to the gap of the interval d, the relatively low-temperature air that has flowed into the space 60 inside the door 20 through the hole 62 flows directly between the outer glass 26 and the inner glass 27. Since it reaches the intermediate portion, it is possible to suppress heat transfer to the outer glass 26 from the temperature of the inner glass 27 which becomes high due to the heat in the heating chamber 50 , thereby effectively lowering the temperature of the outer glass 26 . The hole 62 formed in the lower plate 20 c also functions as an outlet for foreign matter that has entered the space between the outer glass 26 and the inner glass 27 of the door 20 .

FIG. 8 is an enlarged side view of a main part showing the shape of the side surface of the door of the toaster oven according to this embodiment.

As shown in FIG. 8, on the side surface of the door 20, a plurality of openings formed on the side surface of the door 20 are formed in the bent portion 20a2 of the main plate 20a that constitutes the outer shell of the door 20 and the side surface. slits 61 are arranged in the vertical direction. FIG. 8 shows an example in which a total of five vertical slits (61a, 61b, 61c, 61d, and 61e) are formed, but the shape and the number of arranged slits 61 are merely examples. , is not limited to the illustrated form.

Since the side surfaces of the substantially rectangular door 20 are located above the bottom surface, the slits 61 formed in the side surfaces of the door 20 are located above the holes 62 formed in the bottom surface of the door 20. It will happen. Since the air warmed in the space 60 inside the door 20 moves upward due to natural convection, the air that flows into the space 60 inside the door 20 through a hole portion 62 that is an opening formed in the bottom surface of the door 20 flows into the door. There is a natural flow of air out of slits 61 which are openings formed in the sides of 20 . For this reason, as shown in FIG. 8, by forming at least a part of the slit 61 in the upper half region above the center of the side surface, the higher temperature air in the space 60 can directly flow to the outside. It is preferable because it becomes easier to flow out and the effect of lowering the temperature of the air in the space 60 inside the door 20 is enhanced.

FIG. 9 is an enlarged view of a main part showing the positional relationship between a slit, which is an opening formed on the side surface of the door, and the space inside the door. FIG. 9 shows a cross section of the position where the slit is formed on the side surface as viewed from above the door.

As shown in FIG. 9, the slit 61 formed in the side surface of the door 20 is defined by the width d between the outer glass 26 and the first plane 20d1 of the glass retainer 20d formed by the protrusion 20d4 of the glass retainer 20d. By facing the gap between the outer glass 26 and the inner glass 27, the air whose temperature has risen in the space between the outer glass 26 and the inner glass 27 can be efficiently discharged to the outside of the door 20. - 特許庁

In the toaster oven 100 according to the present embodiment, as shown in FIG. 8, the side folded portion 20b3 of the upper cover 20b that forms the upper surface and the upper side surface of the door 20 is also provided with a slit 63 that is an opening on the side surface of the door. is formed. By doing so, the warm air that has leaked into the space inside the door 20 other than the space surrounded by the outer glass 26, the glass retainer 20d and the inner glass 27 is removed from the space inside the door 20. There is an effect of escaping to the outside from. As a result, the temperature of the entire space inside the door 20 can be lowered more effectively, and in particular, the temperature in the vicinity of the fixing portion of the handle 21 for opening and closing the door 20 can be lowered.

The effects of the toaster oven 100 according to this embodiment will be described below.

FIG. 10 shows the results of thermographic measurements showing the degree of heat transfer to the front of the toaster oven. FIG. 10(a) shows the measurement results of the toaster oven of the present embodiment, and FIG. 10(b) shows the measurement results of the toaster oven having a single glass door as a comparative example.

In each case, the condition in which the temperature in the heating chamber is most likely to rise is when no food is placed in the heating chamber and the set temperature is 250° C. for 10 minutes. At this time, it is considered that the temperature inside the heating chamber has reached around 250° C., which is the set temperature. In addition, a resin cup was placed in the center of the door of the oven toaster at a distance of about 12 cm from the main body, and the thermographic measurement point was also measured at the spout at the tip of the cup.

As shown in FIG. 10(a), in the toaster oven of this embodiment, even when the temperature in the heating chamber exceeds 200°C, the temperature rise of the handle 21 above the door 20 is small, about 26 to 27°C. ing. The temperature of the spout at the tip of the cup is 30.4° C. as shown in the figure.

On the other hand, in the toaster oven of the comparative example having a single-glazed door shown in FIG. It can be seen that the part has risen to 40.4°C and 40°C or higher.

Thus, in the toaster oven 100 according to the present embodiment, the air in the space 60 inside the door 20, particularly the space between the outer glass and the inner glass, flows in from the hole 62 formed in the bottom surface of the door 20. This shows that the temperature of the space 60 inside the door 20 is favorably lowered by generating an air flow that flows out from the slit 61 formed on the side surface of the door 20 .

It should be noted that the toaster oven of this embodiment shown in FIG. It can be confirmed that the temperature is high and is 40° C. or higher. This is because the toaster oven according to the present embodiment has a double-glazed door and further has a rear surface that protrudes so that the inner glass of the door is positioned inside the heating chamber, thereby providing a space between the heating chamber and the door. This is considered to reflect the measurement result that the temperature in the heating chamber is high even if the heating conditions of the heater are the same.

FIG. 11 is a diagram showing changes in the temperature inside the heating chamber of the toaster oven.

In FIG. 11, a solid line indicated by reference numeral 71 represents changes in the temperature inside the heating chamber 50 in the toaster oven having a double-layered glass structure including the outer glass 26 and the inner glass 27 according to this embodiment. 11, the dotted line 72 in FIG. 11 indicates the heating chamber of a toaster oven as a comparative example in which the volume of the heating chamber 50 and the output of the heater are the same, but the door is provided with only one piece of glass. It shows temperature change. In either case, the temperature is measured at a position about 30 mm above the central portion of the cooking net 41 with only the cooking net 41 placed in the heating chamber 50 without placing the food to be cooked or the cooking plate 42. are doing.

As shown in FIG. 11, in the double-glazed toaster oven (reference numeral 71) of the present embodiment, the temperature is higher than the single-glazed toaster oven (reference numeral 72) of the comparative example after 10 seconds from the start of heating. It can be seen that the temperature in the heating chamber rises while maintaining .

Thus, in the toaster oven according to the present embodiment, the temperature in the heating chamber was higher than in the toaster oven with the single-glazed glass structure of the comparative example. The inner glass 27 located in the central portion of the door 20 is arranged in the heating chamber 50, and the surface is curved from the peripheral portion to the central portion where the inner glass 27 is arranged. , the gap between the heating chamber 50 and the door 20 is effectively closed, and the path for the warmed air in the heating chamber 50 to escape to the outside becomes longer, and the temperature in the heating chamber 50 increases. This is thought to be due to the fact that the .

Next, when four pieces of bread were placed on the cooking net 41 and toasted, variations in the color of the bread were checked.

FIG. 12 shows the color of the upper surface when four pieces of bread are toasted in a toaster oven. Similarly, FIG. 13 shows the browning of the lower surface, ie, the cooking grid side, when four slices of bread are toasted.

In each figure, (a) is the browning color in the toaster oven having a double glass door according to the present embodiment, and (b) is the toaster oven having a single glass door as a comparative example. The baked color is indicated, respectively. Also, the toasting time that was checked was set to 250° C. and 3 minutes, and toasting was performed by operating all the three heaters 51 to 53 .

As shown in FIG. 12, (a) showing the top surface browning in the toaster oven of this embodiment equipped with the door 20 having a double glass structure is the surface of four pieces of bread placed on the cooking net 41. On the other hand, the upper surface of the comparative oven toaster with a door made of single glass was clearly light in color, indicating that it was not sufficiently heated. In addition, there is a clear level difference in browning between the upper two sheets in FIG. It can be seen that the temperature distribution in the heating chamber is also in a non-uniform state compared to the toaster oven according to the present embodiment having a double-glazed door.

Even in the state of the lower surface of the toast shown in FIG. 13, the double-glazed door shown in FIG. It can be seen that the oven toaster with the door made of glass has a light browning color, and the browning color is large depending on the position on the cooking net.

Thus, even when toast is actually baked, the oven toaster according to the present embodiment, which includes the double-glass door 20 having the outer glass 26 and the inner glass 27, provides sufficient and more uniform heating. was confirmed to take place.

FIG. 14 is a diagram showing the heating state of quiche-like toast, which is toasted with the top surface of the loaf of bread slightly recessed and a cooked product of egg, cheese, and milk placed thereon.

FIG. 14(a) shows the grill marks in the toaster oven according to the present embodiment having a door with a double glass structure, and FIG. 14(b) shows the grill marks in the toaster oven with a single glass structure as a comparative example. showing.

Moreover, FIG. 15 shows the result of measuring the temperature of the substantially central portion of the ingredients of the quiche-style toast shown in FIG. In FIG. 15, the solid line 81 indicates the temperature change in the cheese on the surface of the toast in the toaster oven of this embodiment having the double glass structure.

As shown in FIG. 14, even when toasting a mixture of eggs and cheese that requires slow heating with milk on top of the bread, the oven of this embodiment equipped with a double glass door In the toaster, compared with the comparative oven toaster having a single glass door, the entire cheese surface was evenly browned and the toast surface was evenly heated. In addition, from the results of the temperature change shown in FIG. 15, in the oven toaster of this embodiment having a double-glass door, the temperature inside the cheese after cooking for 15 minutes reached almost 100 ° C. (The temperature in the heating chamber at this time is about 215°C.) In the toaster oven of the comparative example with the single glass structure, the temperature inside the cheese remains at a low temperature of around 85°C (the temperature in the heating chamber at this time is about 210°C.) I was able to confirm that. Although illustration is omitted, in the cooking in the toaster oven of the comparative example, when the cross section was confirmed, it was confirmed that there was a part of the cheese near the surface of the bread that was judged to be insufficiently heated. rice field. From this, it was confirmed that in the toaster oven according to the present embodiment, the temperature rise inside the cheese was increased, and the cheese was heated more effectively.

In addition, when the inventors confirmed, the degree of heating in a toaster oven with a double glass structure is equivalent to that in a toaster oven with a single glass structure in about two and a half minutes. It was found that what required cooking time could be reduced to two and a half minutes.

FIG. 16 is a diagram showing the evaporation rate of moisture inside bread when toasted in a toaster oven.

In FIG. 16, what is shown as reference numeral 91 on the left side is the moisture evaporation rate in a comparative oven toaster having a door with a single glass configuration, and what is indicated as reference numeral 92 on the right side is a book having a door with a double glass configuration. It shows the moisture evaporation rate in the oven toaster according to the embodiment.

More specifically, the moisture evaporation rate is the change in weight of the bread before and after toasting. Moisture evaporation rate was defined as a percentage of the thickness. For each, two slices of bread were toasted and the weight reduction rate was calculated when the weight before heating was 65 g.

In the toaster oven having a door with a single glass structure indicated by reference numeral 91 in FIG. was 59.3 g. In the second toast, 60.6 g before toasting became 55.5 g. Converting this per 65 g, a water evaporation rate of 8.2% was obtained.

On the other hand, in the toaster oven of the present embodiment having a double-glazed door, the 65.1 g before toasting for the first piece of toast becomes 60.1 g, and the 65.0 g before toasting for the second piece of toast becomes 60.1 g. 0 g. The water evaporation amount obtained from this result was 7.7%.

In this way, in the toaster oven according to the present embodiment, by adopting a double-glazed structure of the outer glass 26 and the inner glass 27, not only the amount of heat but also the amount of moisture escaped from the heating chamber 50 is reduced. I was able to confirm that. From this, in the oven toaster with a double glass door, the escape of moisture during cooking is suppressed compared to the conventional oven toaster with a single glass door, and the surface has a crisp texture. , it was confirmed that toast with a chewy texture inside could be cooked.

As described above, in the toaster oven according to the present embodiment, the door has a double glass structure of the outer glass and the inner glass to form a space between the outer glass and the inner glass, and the bottom of the door is formed The space inside the door and the outside space are communicated with each other by the holes as openings and the slits as openings formed in the side surface of the door. As a result, the natural convection of the air warmed in the space inside the door causes the air to flow into the space inside the door through the holes in the bottom of the door and flow out through the slits on the side of the door to the outside. , the temperature rise of the air in the space inside the door can be suppressed. As a result, heat transfer of the temperature in the heating chamber to the front of the door via the inner and outer glass of the door is reduced, for example, other members such as cooking utensils placed in front of the door, and the door. It can effectively prevent the temperature of the upper handle from rising.

In addition, in the toaster oven shown in this embodiment, the door covering the front of the heating chamber has a double glass structure with an outer glass and an inner glass to effectively prevent the temperature in the heating chamber from escaping. The temperature in the heating chamber can be made higher. In addition, in the toaster oven according to the present embodiment, the inside of the double-glazed door is a space connected to the outside of the toaster oven, so that the heat in the heating chamber is transferred to the outside glass, cups placed near the door, etc. can be effectively prevented from being transmitted.

For example, even in the case of menus such as gratin that are cooked at a high temperature for the longest time, the temperature of the outer surface of the outer glass is set to 180 ° C in the case of a toaster oven with a single glass structure when the set temperature in the heating room is set to 250 ° C for 30 minutes. was able to be lowered to around 140°C, which is about 40°C lower. In addition, in the case of toasting a single piece of bread, the temperature of the surface of the outer glass after the toasting time of 3 minutes could be lowered from 100°C in the case of the single-sheet glass configuration to 40°C, which is about 60°C lower.

In addition, the double-glazed structure prevents the temperature and moisture in the heating chamber from escaping through the gap between the door and the unevenness of the toasting color during toasting, and the bread before and after toasting. It was confirmed that the water evaporation rate of

In the above explanation, the central portion of the back surface of the door protrudes and the inner glass is positioned inside the heating chamber. Since the inner glass is positioned, the effect of preventing escape of heat and moisture in the heating chamber is exhibited. In the above embodiment, the area of the inner glass is made smaller than the area of the outer glass, and the lower end of the inner glass is positioned above the position of the cooking net. Regarding the area and especially the arrangement position of the inner glass in the vertical and horizontal directions, the heat escape from the heating chamber, the amount of heat transmitted to the outside through the double glass, the weight of the entire door, the thickness of the door, etc. It can be appropriately determined in consideration of the shape, design of the toaster oven, and the like.

The oven toaster of the present disclosure has a double-glazed door that covers the front of the heating chamber, and the space inside the door has openings on the bottom and side of the door, so that the temperature of the air in the space inside the door rises. This is useful in that it is possible to effectively reduce heat conduction to the front of the door.

20 door 26 outer glass (first glass)
27 inner glass (second glass)
41 cooking net 50 heating chamber 51 upper heater (heater)
52, 53 lower heater (heater)
60 space 61 slit (opening on the side of the door)
62 hole (opening at the bottom of the door)
63 slit (opening on the side of the door)

Claims (5)

a heating chamber;
an openable and closable door covering the front surface of the heating chamber;
a cooking net on which the food to be cooked placed in the heating chamber is placed;
At least one heater of an upper heater arranged above the cooking net in the heating chamber and a lower heater arranged below the cooking net in the heating chamber,
The door comprises a first glass arranged on the front side and a second glass arranged on the heating chamber side,
A holding member for holding the first glass in contact with the rear surface near the lower end of the first glass has a plurality of projections projecting to the front, and the rear surface of the first glass Abuts on the tip of the protrusion,
An opening is formed in the bottom surface of the door and the side surface of the door,
A space in the door formed between the first glass and the second glass is connected to the outside through the opening , and gaps between the plurality of projections are formed on the bottom surface of the door. A toaster oven, characterized in that the air that has flowed into the space inside the door from an opening formed in the door can pass therethrough . 2. The toaster oven according to claim 1, wherein the opening formed in the side surface of the door is positioned above the vertical center of the side surface. 3. The toaster oven according to claim 2, wherein a side surface of said door is formed with a plurality of said openings arranged vertically. The oven according to any one of claims 1 to 3 , wherein said second glass has a smaller area than said first glass, and a lower end of said second glass is positioned above said cooking net. toaster. The toaster oven according to any one of claims 1 to 4 , wherein the second glass is arranged at a position protruding toward the heating chamber from the surface of the door on the heating chamber side.

Images