TW201836474A - Heating processor capable of performing high-efficiency heat exchange between heater and air while controlling wall temperature of heating room for eliminating non-uniform food heating - Google Patents

Abstract

The present invention provides a heating processor for heating and processing food in high efficiency. The heating processor may blow the hot air in a slightly forwarded manner while ensuring the hot air circulation volume without colliding the food or wall, so as to perform high-efficiency heat exchange between heater and air and control the heated wall temperature for reducing the temperature difference in heating room and thus eliminate the non-uniform heating for food. The heating processor of the present invention comprises a heating room and a hot air circulation unit and is characterized in a hot air circulation unit hood, which comprises a convex hood surface disposed nearly at the center enclosing a rotating shaft for connection of a hot air fan and a hot air motor; an inclined hood surface which is inclined from the convex hood surface toward the rear side; a back hood surface located further behind than the convex hood surface; and, a hot air guiding surface for guiding hot air to the front side; wherein, the inner diameter of the inclined hood surface is smaller than the outer diameter of the hot air fan and the outer diameter of the inclined hood surface is larger than the outer diameter of the hot air fan.

Description

Heating conditioner

The present invention relates to a heating conditioner that uses hot air generated by a heater and a fan to heat food.

In a baking microwave oven, which is a representative heating conditioner in the prior art, the food is heated and heated by setting the heating chamber to a high temperature with a heater. In addition, in some of the baking microwave ovens, a structure for stirring and heating the air in the room using a fan is adopted in order to be able to perform two-stage baking conditioning. Specifically, in general, a hot air circulation unit including a fan and a heater is arranged on the deep side or the outer side of the side of the heating chamber, and the air from the heating chamber to the hot air circulation unit is drawn. A hot air circulation method in which heating is performed by a heater and hot air that has become high temperature is supplied to the interior of the heating chamber. In the case of two-stage baking conditioning, two baking pans are installed in the heating chamber, and the air is drawn to the hot air circulation unit from the central space surrounded by the baking pans. The space on the outer side, that is, hot air is supplied to the upper and lower portions of the upper grill plate and the lower portion of the lower grill plate. Such a hot air circulation unit is mainly a structure that sucks air from a slightly central portion of a fan, heats the sucked air, and then blows out hot air from above and below. The hot air circulation unit is located near the center of the hot air circulation unit. A centrifugal fan that sucks air from the center of the fan and discharges the air toward the centrifugal direction of the fan is provided. A heater is arranged around the fan. The wall surface between the hot-air circulation unit and the heating chamber is provided with a hot-air blowing outlet, and has a structure for supplying hot air to the heating chamber from the hot-air circulation unit. In this case, the hot air system flows from the centrifugal fan toward the centrifugal direction of the fan (that is, the diameter direction of the fan). Therefore, the hot air supplied from the hot air outlet to the heating chamber is mainly a flow path that flows toward the upper and lower wall surfaces of the heating chamber. In general, when heating air with a heater, in order to perform heat exchange with good efficiency, the heater is arranged on the air path blown from the fan. If the heater is installed near the heating chamber, not only air but also the wall surface of the heating chamber near the heater will be heated by radiant heat. The temperature of the wall surface becomes high and becomes an important factor of uneven heating. Therefore, , The heater is arranged at a position away from the wall surface of the heating chamber to some extent. On the other hand, if the wind speed around the heater is increased, the heat exchange system caused by the heater is promoted, so that the system can heat the air with good efficiency. However, if the wind speed is simply increased, , When the hot air is supplied into the heating chamber, the hot air may be discharged toward the upper and lower wall surfaces of the heating chamber. As a background technology in this technical field, there is Patent Document 1. In this bulletin, it is described that "the suction port is provided at a position slightly spaced from the two side walls, and the blow-out port is provided in the" the partition wall and the side wall are connected to each other. " In the vicinity of the middle between the "peripheral edge portion of the partition wall" and the "suction port", the frame is connected to the partition wall near the air outlet. Further, in Patent Document 2, it is described that "the heating device is provided inside the heat source chamber, and is provided with: an air supply section for forming an air flow; and a heating section for heating the air flow; and a flow path formation The part is formed so that the air flow heated by the heating part moves toward the surface opposite to the partition wall and circulates in at least a part of the space in the heat source room, and then from the plurality of blowing outlets. The content of at least one blower outlet is a flow path blown out toward the center of the heating chamber. In these documents, it is proposed to prevent the hot air from flowing toward the upper and lower wall surfaces of the heating chamber so that the wind direction of the hot air supplied from the hot air circulation unit to the heating chamber is directed toward the center of the heating chamber. The construction of control. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 2011-163695 [Patent Document 2] International Publication No. 2011/086948

[Problems to be Solved by the Invention] 加热 The heating device described in Patent Document 1 states that "the hot air from the air outlet can be directed toward the center of the heating chamber" by adjusting the position of the hot air outlet. . However, as the fan used in the hot air circulation unit, a centrifugal fan is used which generates air flow toward the outside of the diameter of the fan. Even if the position of the hot air outlet is adjusted, it is caused by the inside of the hot air circulation unit. There is a case where air flows from the fan to the outside in the diameter direction, and the direction of the hot air coming out from the hot air outlet is likely to be toward the outside of the fan. Therefore, the hot air is supplied from the hot air outlet toward the wall surface of the heating chamber located in a direction outside the fan. Therefore, the hot air system may heat the wall surface of the heating chamber. In addition, if the wall surface of the heating chamber becomes higher than necessary, heating unevenness of food in the heating chamber may occur, or heating efficiency may decrease due to an increase in the amount of heat leakage from the wall surface, or This is a condition that causes damage to parts placed near the wall. Further, in Patent Document 1, the prevention of heating of the upper and lower wall surfaces caused by the adjustment of the height position of the hot air outlet is described, but the heating of the left and right wall surfaces is not considered. Furthermore, when the hot air outlet is arranged away from the wall so that the hot air is directed toward the center of the heating chamber, the position of the hot air outlet and the baking tray depends on the position of the hot air outlet and the baking tray. It may change, so the system may adversely affect the heating performance. For example, when the air path is blocked due to a baking pan or the like, the hot air cannot flow throughout the heating chamber, so the hot air supply system required for the two-stage baking conditioning Become difficult. In addition, depending on the shape or arrangement position of the food, the partial heating of the food is promoted due to the flow of hot air toward the food, and uneven heating occurs. In the heating device described in Patent Document 2, it is described that by providing a flow path forming portion near the hot air blowing outlet, "the hot air coming from the blowing outlet is brought into uniform contact with the object to be heated in the heating chamber, In addition, the direct heating of the wall surface of the heating chamber is reduced, and a concentrated heating operation for the object to be heated is performed. " However, since the heater is arranged on the rear surface of the fan, and the airflow generated in the diameter direction of the fan is advanced, the flow path forming portion is used to blow out toward the heating chamber side after turning to the rear side. Therefore, in the structure provided with the flow path formation part described in Patent Document 2, the air flow path is complicated, the loss is increased, and the amount of air flow may be reduced. In order to heat the air with good efficiency and make the temperature distribution in the heating chamber close to uniform, it is necessary to ensure the air volume and circulate the hot air throughout the heating chamber. However, it is due to the installation of the flow path forming section. It will be reduced. Therefore, the air in the heating chamber will not be sufficiently stirred, and uneven heating may occur. In addition, since the hot air is supplied toward the center of the heating chamber, the path of the hot air is different depending on the position where the food is placed, as in Patent Document 1. In some cases, the path of the hot air is different. It flows toward food, and there may be cases where uneven heating occurs due to the temperature of a part of the food becoming high. In addition, if the flow path is set to be wide in order to reduce the loss and adjust the discharge direction of the hot air, the volume system of the hot air circulation unit will become larger, and the internal volume of the warehouse will be reduced. The present invention has been made in view of such a situation, and an object thereof is to provide a heating conditioner capable of performing highly efficient heating conditioning. The heating conditioner is directed from a fan toward a rotation axis direction. The air flow is generated, and the hot air is blown out toward the front of the heating chamber while ensuring the circulating air volume. Therefore, it is possible to perform high-efficiency heat exchange between the heater and the air, and simultaneously to the wall temperature of the heating chamber. It suppresses the uneven heating of food. [Means to solve the problem] In order to solve the above-mentioned problem, the heating conditioner of the present invention includes a heating chamber for storing food, and a hot-air circulation unit installed behind the square wall behind the heating chamber. The hot-air circulation unit Is provided with: a hot-air heater for heating air; and a hot-air fan for circulating the air in the heater; and a hot-air motor driving the hot-air fan; and the heating chamber is provided with the hot-air heater and the hot-air fan, The hot air circulation unit cover of the hot air motor is arranged on the back side of the main body. The hot air circulation unit cover is provided with a convex surface of a cover which is disposed at a slightly central position and surrounds a rotating shaft connecting the hot air fan and the hot air motor. ; And a cover inclined surface surrounding the convex surface of the cover and inclined rearward from the convex surface of the cover; and a rear surface of the cover surrounding the inclined surface of the cover and positioned further rearward than the convex surface of the cover; The hot-air guide surface leading to the front, the outer diameter of the convex surface of the cover is smaller than the outer diameter of the hot-air fan. Further, the convex cover, compared to the back surface of the cover system, the hot air toward the fan-side, for projecting more than 10mm or as the protrusion height of 1/3 of the hot air above the guide surface. The heating conditioner is provided with a heating chamber for storing food and a hot air circulation unit provided behind the square wall behind the heating chamber. The hot air circulation unit includes hot air heating for heating air. A hot air fan that circulates the air in the heater; and a hot air motor that drives the hot air fan; and the hot air heater and the hot air fan are arranged on the heating chamber side, and the hot air motor is arranged on the back side of the body The hot air circulation unit cover includes a cover convex surface provided at a slightly central position and surrounding a rotary shaft connecting the hot air fan and the hot air motor; and a convex surface surrounding the cover and extending from the cover. A sloping surface of the hood inclined from the convex surface toward the rear; and a hood back surface surrounding the sloping surface of the hood and positioned further behind than the convex surface of the hood; The inside diameter of the inclined surface of the cover is smaller than the outside diameter of the hot-air fan, and the outside diameter of the inclined surface of the cover is The outer diameter of the hot air fan and larger. [Effects of the Invention] According to the present invention, the airflow inside the hot air circulation unit is an airflow capable of performing high-efficiency heat exchange between a heater and air and suppressing an increase in pressure loss in a flow path. Therefore, the system can provide a heating conditioner that can perform high-efficiency heating conditioning. The heating conditioner can blow the hot air toward the front while ensuring the circulating air volume of the hot air, so it can be used for the heating chamber. The wall surface temperature is suppressed to reduce the temperature difference in the heating chamber, and the uneven heating of food is suppressed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Embodiment 1] A heating conditioner according to Embodiment 1 of the present invention will be described with reference to Figs. 1 to 11. The present invention is also applicable to a single-function oven that does not have a microwave heating function. However, in the present embodiment described below, a microwave oven heating function with a microwave for heating food and a heater are used. A baking microwave oven having both functions of a baking heating function for heating food with a fan, to explain one embodiment of the present invention. In addition, the present invention is not limited to the position of the hot air circulation unit. However, in the present embodiment described below, a structure provided with a hot air circulation unit behind the heating chamber is used. One embodiment of the present invention will be described. [Overall Structure] First, the structure of the main body 1 of the baking microwave oven (heating conditioner) will be described with reference to FIGS. 1, 2, and 11. FIG. 1 is a schematic view of the main body 1 of the heating conditioner of this embodiment viewed from the right side, FIG. 2 is a schematic view of the main body 1 viewed from the front side, and FIG. 11 is a front right top Here is a perspective view of the main body 1. In addition, as shown by the arrows in the drawings, the door side is set to the front and the hot air circulation unit side is set to the rear with respect to the heating chamber. The directions of the arrows are also used in the description for up, down, left, and right. . As shown in these figures, the main body 1 of the baking microwave oven includes a heating chamber 2 with an opening in the front, an openable door 11 capable of closing the opening of the heating chamber 2, and a door 11 The hot air circulation unit 3 behind the heating chamber 2 behind the square wall surface, and the machine room 4 provided in a direction below the heating chamber 2. The door 11 shown here is for opening and closing by rotating the front side downward as an axis, but the door 11 may be a door 11 that is rotated using the side as the axis. After that, the heating chamber 2, the machine chamber 4, the hot air circulation unit 3, and the like are covered with the box chamber 10 to form the main body 1 of the baking microwave oven. In addition, on the bottom surface below the heating chamber 2, a table board 23 is arranged to carry a load such as food. In the machine room 4 below the table 23, a magnetron 40, a waveguide 41, a rotary antenna 42, an antenna motor 43 and the like are arranged. The microwave generated at the magnetron 40 is transmitted to the rotary antenna 42 through the waveguide 41, and is radiated into the heating chamber 2 from the rotary antenna 42 driven by the antenna motor 43. As a result, the food placed in the heating chamber 2 is heated by the microwave. A heating method using a microwave is called microwave heating. Further, an upper heater 24 is provided above the heating chamber 2. By setting the upper surface of the heating chamber 2 to a high temperature with the upper surface heater 24, the food can also be heated by radiant heating. The heating method using radiant heating is called oven heating. In addition, a hot-air blowing port 34 and a hot-air suction port 35 formed by a plurality of round holes are provided on the rear wall surface of the heating chamber 2. A hot-air circulation unit 3 is provided behind the rear wall surface. Most of the circular holes constituting the hot-air blowing port 34 and the hot-air suction port 35 are of a size that allows air to pass through but does not allow microwaves to pass through. The hot-air circulation unit 3 includes a hot-air fan 30 installed near the center, a hot-air motor 31, and two hot-air heaters 32 arranged above and below the hot-air fan 30, and hot air covering all of them. The circulation unit cover 33 is constituted. The structure is such that the hot-air fan 30 is driven to rotate by the hot-air motor 31, and the air in the heating chamber 2 is attracted from the hot-air suction port 35. After the air is heated by the hot-air heater 32, The high-temperature air is supplied into the heating chamber 2 from the hot-air blowing outlet 34 as hot air. By supplying hot air to the heating chamber 2 and setting the air in the heating chamber 2 to a high temperature, the food is heated by convection heating. Here, the heating method using convection heating by hot air is called baking heating. In the condition that the food is not baked and colored and the temperature is set to a high temperature from the inside, it is heated in a microwave oven. In the condition that the entire food is heated and baked, the baking is used. Heating, in the baking and coloring of the surface of food, use an oven heating, and by combining these heating, various heating and conditioning can be performed. [Configuration of Hot Air Circulation Unit] Here, the detailed structure of the hot air circulation unit 3 of this embodiment will be described with reference to FIGS. 3 to 6. Fig. 3 is a perspective view of the hot air circulation unit 3 viewed from the front to the right, Fig. 4 is a front view of the hot air circulation unit 3 viewed from the front, and Fig. 5 is a view of the hot air from the right. The circulation unit 3 is a schematic diagram of observation. FIG. 6 is a perspective view in which one example of the hot-air fan is viewed from the front side to the right. As shown in FIG. 3, the configuration of the hot air circulation unit 3 is such that a hot air fan 30 is arranged near the center of the heating chamber side of the hot air circulation unit cover 33, and two linear fans are arranged above and below the hot air fan 30. The hot air heater 32 is provided with a hot air motor 31 near the center on the back side of the main body. Thereafter, the hot-air fan 30 and the hot-air motor 31 arranged on the same axis are connected by a rotating shaft, and the hot-air fan 30 can be rotated when the hot-air motor 31 is driven. The hot air circulation unit cover 33 has a box-like shape formed by extrusion processing or press processing, and has a cover plane 33A having a convex surface that is a convex surface surrounding the rotation axis of the hot air fan 30; and The sloping surface 33D of the hood which is inclined toward the rear from the hood plane 33A; and the hood back surface 33B which is positioned further behind than the hood plane 33A which is a convex surface; and the hot air which directs the hot air toward the hot air outlet 34 in front The guide surface 33E has a shape in which the hot-air fan 30 and the hot-air heater 32 can be built in. In addition, a wind direction plate 36 for adjusting the wind direction inside the hot air circulation unit 3 is provided at the cover back surface 33B. The hot air fan 30 is a fan in which a hot air fan wing 30A is integrally formed by bending a part of a hub surface 30C that is a metal plate, as shown in FIG. 6. The side system 30A is formed with an inter-wing flow path 30B. As shown in FIG. 5, the cover plane 33A and the cover back surface 33B are planes which are slightly perpendicular to the rotation axis of the hot air fan 30, and the cover inclined surface 33D is for connecting the cover plane 33A and the cover back surface 33B. The plane is inclined with respect to the rotation axis of the hot-air fan 30. Also, as shown in FIG. 4, the outer diameter dimension 33AL of the cover plane 33A when viewed from the front side is smaller than the outer diameter dimension 30L of the hot air fan 30, and is made from the front side. The outer diameter dimension 33DL of the inclined surface 33D of the cover during observation is larger than the outer diameter dimension 30L of the hot-air fan 30. With this configuration, the hot air fan 30 not only generates the airflow of the arrow 3B which is mainly a component having a diameter direction, but also generates a component having an axial direction which flows through the inter-wing flow path 30B and flows to the rear side of the hot air fan 30. Arrow 3A of airflow. The air flow of the arrow 3A is behind the hot air heater 32, and is guided and flows in sequence through the cover inclined surface 33D, the cover back surface 33B, and the hot air guide surface 33E. Combined with the air flow of the arrow 3B, it becomes an air flow slightly parallel to the top plate and the bottom surface of the heating chamber 2, and is supplied into the heating chamber 2 from the hot air blowing outlet 34. In addition, it was confirmed that when the height of the cover plane 33A relative to the cover back surface 33B is set to 10 mm or more, or when the height is set to 1/3 or more of the height of the hot air guide surface 33E, the system A sufficient airflow can be formed in the path of the arrow 3A, and a suitable synthetic airflow can be generated. Here, in this embodiment, although the rotation direction of the hot-air fan 30 is not specified, the hot-air fan wing 30A is directed in a direction that generates airflow toward the inter-wing flow path 30B, that is, Orientation will place the hub surface 30C in the direction of rotation of the hot air fan wing 30A downstream from the normal rotation direction (counterclockwise rotation when viewed from the front of Figures 3 and 4, and the direction of rotation 30D in Figures 4 and 6 In the case of rotation, since the amount of air flowing from the hot air fan 30 can be ensured, the effect of this embodiment is easily obtained. In addition, the shape of the hot air circulation unit cover 33 is provided with a cover convex surface smaller than the outer diameter size 30L of the hot air fan 30 at the heating chamber 2 side (in this embodiment, it is a cover plane 33A), and There is a cover back surface 33B at the rear side, which is not particularly limited in shape. However, the smaller the outer diameter of the cover plane 33A as viewed from the front side, the smaller the cover plane 33A and the inter-wing flow path 30B. The smaller the overlapping area is, the more the air volume of the arrow 3A flowing in the direction of the rotation axis can be increased. In addition, the hot air motor 31 is arranged on the back surface of the cover plane 33A protruding toward the heating chamber 2 side as in this embodiment, so that the hot air motor 31 can be brought close to the heating chamber 2 and the entire body 1 can be moved. The depth is reduced. Therefore, the outer diameter of the cover plane 33A is preferably as small as possible on the premise that the outer diameter of the cover plane 33A can be incorporated in the hot air motor 31. Moreover, in this embodiment, although the cover plane 33A and the cover back surface 33B are respectively planar shapes perpendicular to the rotation axis of the hot air fan 30, as long as at least two types of surfaces having different depths are provided, The individual surfaces are not absolutely required to be flat, and they may be ribbed or curved surfaces. It is not absolutely necessary to be perpendicular to the rotation axis. The hot-air fan wing 30A can be set at a right angle (90 °) with respect to the hub surface 30C (the surface near the center of rotation of the fan that is slightly perpendicular to the rotation axis). However, the hot-air fan wing 30A and the hub surface 30C The angle formed or the shape thereof is not particularly limited. In the example shown in FIG. 6, the wing inclination angle 30Aa formed between the hot-air fan wing 30A and the hub surface 30C integrally formed with the wing is set to 90 ° or more. In this case, the cutting process of the hot air fan wing 30A is easy, and it has the advantage of being easy to form the hot air fan 30. Also, as shown in FIG. 5, in this embodiment, although a part of the hot air inlet 35 is overlapped with the hot air fan wing 30A, the position or length of the hot air fan wing 30A is not particularly limited. . As such, the shape of the hot-air fan 30 is not particularly limited as long as it has a structure in which the hot-air fan 30 is directed toward the hot-air circulation unit 3 from the heating chamber 2 side and generates airflow in the direction of the rotation axis. Next, the positional relationship between the hot-air heater 5 and other components will be described in detail using FIG. 5. As shown here, the center 320 of the hot air heater 32 is located further forward than the cover back 33B and further behind the hub surface 30C of the hot air fan 30. The center 320 of the hot air heater 32 on the upper side is disposed at a lower position than the hot air blowing outlet 34 on the upper side, and the center 320 of the hot air heater 32 on the lower side is disposed through a hot air blower. Exit 34 is more on the upper side. In other words, when viewed from the hot air fan 30, the upper and lower hot air blowing outlets 34 are disposed outside (downstream) from the center 320 of the hot air heater. Because the body has such a structure, the air discharged from the hot air fan 30 to the rear passes through the hot air heater 32 located behind the hot air fan 30 as shown by arrow 3A, and reaches It is arranged near the hot-air blowing port 34 on the outer side. On the other hand, the air discharged from the hot-air fan 30 to the outer peripheral direction passes through the front of the hot-air heater 32 as shown by the arrow 3B, and reaches the vicinity of the hot-air blowing port 34. The hot air of the arrow 3A and the hot air of the arrow 3B meet in the vicinity of the hot air outlet 34 and become hot air which is slightly parallel to the top and bottom surfaces of the heating chamber 2 and are supplied to the heating chamber 2 from the hot air outlet 34. As explained above, by passing air through both the arrows 3A and 3B, heat can be exchanged between the air and the heater with good efficiency over the entire surface of the hot air heater 32. In addition, compared with a case where the direction of the air flow is forcibly changed by installing a flow path forming portion or the like, since there are no obstacles on the air path and the loss is small, hot air can flow with a large air volume. In addition, the number of rotations of the hot-air fan 30 can be increased to further increase the amount of air. In this case, the heat can be exchanged at a higher efficiency by the heat conduction of the turbulence. As described above, in the configuration of this embodiment, when the hot air motor 31 is driven to rotate the hot air fan 30, the hot air fan 30 not only generates airflow in the diameter direction of the fan, but also rotates the shaft. Generates airflow in the direction. The air after passing through the hot air inlet 35 from the heating chamber 2 is sucked into the hot air circulation unit 3 near the rotation center of the hot air fan 30, and the air discharged from the hot air fan 30 is tied to the hot air heater 32 The surrounding area is heated, becomes high-temperature hot air, flows inside the hot air circulation unit 3, and is supplied into the heating chamber 2 from the hot air blowing outlet 34. Here, in this embodiment, the shape of the cover 33 having the cover flat surface 33A and the cover back surface 33B as a cover convex surface and the airflow from the hot air fan 30 toward the rear in the axial direction are generated from the hot air circulation unit 3 The hot air supplied into the heating chamber 2 is naturally supplied in a direction toward the slightly forward side of the heating chamber 2 as shown in FIG. 5. The hot air inside the heating chamber 2 is along the wall surface. Instead, it flows forward. In the structure in which the hot air circulation unit cover 33 has a slightly flat shape having no convex portion as in the prior art, and the hot air fan 30 generates air flow only in the vertical direction of the rotation axis, the hot air at the hot air blowing outlet 34 advances. The direction is from the hot air fan 30 toward the diameter direction, that is, toward the upper and lower wall surfaces, and the top and bottom surfaces of the heating chamber are heated. Therefore, there is a problem that food cannot be efficiently heated. On the other hand, in the structure of this embodiment, the advancing direction of the hot air at the hot air blowing outlet 34 is slightly forward, and at this point, it is different from the structure of the prior art. In other words, since the hot air blown from the hot air blowing outlet 34 does not flow directly toward the top and bottom surfaces, it flows directly forward, so the heat exchange with the wall surface of the heating chamber 2 is suppressed. The system can prevent the wall surface from being heated more than necessary, and can efficiently heat the air in the heating chamber 2. Therefore, the system can efficiently heat food. Also, in this embodiment, the cover plane 33A, which is a convex surface, is formed not only in the up-down direction of the hot air fan 30 but also in the left-right direction, so it is not only heating The heat exchange between the upper and lower wall surfaces of the chamber 2 and the left and right wall surfaces can be suppressed, and the deterioration of the heating efficiency of the food can be suppressed. Moreover, in this embodiment, the hot-air blowing outlet 34 is positioned above and below the hot-air heater center 320 so that the hot-air circulation unit 3 is arranged above and below the hot-air circulation unit 3 to be heated by two hot winds. The hot air blower outlet 34 formed by the side-by-side holes is formed horizontally by the device 32. The airflow generated from the hot-air fan 30 passes through the vicinity of the rear hot-air heater 32 and flows to the hot-air blowing outlet 34. Since the hot air heater 32 is arranged on the flow path inside the hot air circulation unit 3, the system can perform high-efficiency heat exchange between the hot air heater 32 and the air. The hot air is blown out of the outlet 34 and supplied to the heating chamber, so that the air in the heating chamber can be efficiently heated. In addition, the hot air heater 32 is arranged in a straight bar shape at two places above and below. Therefore, the hot air heater 32 can supply hot air at a uniform temperature in the left and right directions to the heating chamber at the two places. It can suppress the heating unevenness in the upper and lower 2 stages of baking. [Conditioning Method] Next, a conditioning method when baking and heating a food by heating by convection heating will be described using FIGS. 7 to 10. Fig. 7 is a schematic view from the front side of the baking conditioning using the upper shed and the lower shed, Fig. 8 is a view from the right side of the baking conditioning using the upper shed and the lower shed. Schematic diagram, Figure 9 is a schematic diagram of the baking conditioning using the middle shed and the lower shed from the front side, and Figure 10 is a diagram of the baking conditioning using the middle shed and the lower shed from the right side. Observation diagram.烘烤 At the time of baking and heating, a metal baking pan is installed on the shed 21 provided on the left and right wall surfaces of the heating chamber 2, and the food 20 to be heated is arranged on the baking pan 22. By placing the food 20 on the baking sheet 22 and setting the air around the food 20 to a high temperature, the entire food 20 can be heated. In FIG. 7 to FIG. 10, the food 20 is bread (cream roll), and in FIGS. 7 and 8, it is shown that the heating conditioning is performed by the upper and lower stages of the two stages. In FIG. 9 and FIG. In 10, it shows the case where the heating conditioning is performed by the middle stage and the lower stage. After the food 20 is placed on the baking sheet 22, if an instruction for heating conditioning is issued on an operation panel (not shown), a specific current flows in the hot air heater 32 to generate heat, and at the same time, the hot air motor Driven by 31, the hot-air fan 30 rotates and generates a circulating flow of air inside the heating chamber 2 and the hot-air circulation unit 3. Specifically, the air between the upper and lower baking trays is sucked into the hot air circulation unit 3 from the hot air suction port 35, and after the air is heated by the hot air heater 32, it is heated to High-temperature air (hot air) is supplied from the hot-air blowing outlet 34 to above the upper baking tray and below the lower baking tray. The high-temperature air is circulated repeatedly by sucking the air toward the hot-air circulation unit 3 and supplying the hot air toward the heating chamber 2, whereby the temperature inside the heating chamber 2 rises. The temperature in the heating chamber 2 is controlled by a temperature sensor (not shown), and the air in the heating chamber 2 is maintained at a high temperature according to the conditions (temperature, time, etc.) indicated by the user. Thereby, the heating conditioning of the foodstuff 20 is performed. In the present embodiment, the hot air supplied from the hot-air blowing port 34 into the heating chamber 2 is an airflow directed slightly forward of the heating chamber 2. Therefore, even when the baking tray 22 and the food 20 are arranged, the hot air supplied from the hot air blowing outlet 34 flows to the front of the heating chamber 2 without contacting the food 20. The door 11 is wound around the baking tray 22 and flows to the hot air inlet 35 behind the heating chamber 2 and is again drawn into the hot air circulation unit 3 between the heating chamber 2 and the hot air circulation unit 3 The system has a circulating air path. By allowing the hot air to reach the front of the heating chamber 2, the hot air is distributed throughout the entire heating chamber 2, and the temperature difference inside the heating chamber 2 can be reduced. In addition, since the hot air flows from the hot air blowing outlet 34 toward the front, it does not matter whether the grill pans are arranged in the upper and lower stages as in FIG. 7 and FIG. 8 or in general, as in FIGS. 9 and 10. In the case where the grill pan is arranged in either of the middle and lower stages, the hot air flows in the same way. Therefore, regardless of the arrangement of the food or the baking sheet, it is possible to perform heating conditioning that suppresses uneven heating. [Characteristics and effects of the structure] When hot air is supplied toward the wall surface for supply, there is heat exchange between the hot air and the wall surface, and the wall surface is heated, and the temperature of the wall surface will be compared with the air temperature in the heating room. Or the temperature of the food becomes extremely high, and the temperature of the food near the wall may be different from that of other foods, causing uneven heating. In addition, since the wall surface becomes very high temperature, components such as sensors and substrates installed around the wall surface become high temperature, which may make cooling difficult. In addition, when a partition is installed in the middle of a flow path to make a flow path, the flow path system becomes complicated, so the resistance and loss of the air path are increased, the air volume is reduced, and the air temperature difference around the food is reduced. The system is enlarged, and because of this, the system may cause uneven heating. In addition, when hot air is supplied toward the center of the heating chamber 2, if the food 20 is placed on the baking tray 22 and installed on the shed 21, the height of the food 20 as a biscuit or the like is low. In the case of food, hot air flows above the food 20. However, in the case where the general food 20 is a high-height food such as bread as shown in this embodiment, since the hot air system contacts the food 20, only a portion touched by the hot air may be It becomes high temperature. Conversely, since the hot air system does not flow before the heating chamber 2, the temperature system does not rise, and there may be a temperature distribution before and after the heating chamber 2. That is, due to the height of the food 20, the flow path system of the air inside the heating chamber 2 changes, the temperature distribution system is different, and it becomes the cause of uneven heating. In this embodiment, the hot air fan 30 is a fan that generates airflow also in the direction of the rotation axis. With the shape of the hot air circulation unit cover 33 provided with a convex surface, the air is inside the hot air circulation unit 3 It passes through the vicinity of the rear hot-air heater 32 and is supplied into the heating chamber 2 from the hot-air blowing outlet 34. Therefore, the hot air supplied to the heating chamber 2 does not flow in the direction toward the wall surface or the center of the heating chamber, but flows in front of the heating chamber 2. Therefore, it is possible to perform heating without uneven heating. Heat conditioning. Since the heat exchange system caused by the hot air flowing toward the wall surface is suppressed, there is no case where the wall surface becomes higher than necessary, the cooling system of the parts becomes easy, and the heat radiation is also suppressed, and Able to heat air efficiently. In addition, since the loss of the flow path inside the hot air circulation unit 3 is low, the hot air can also flow appropriately behind the hot air heater 32, so it can promote the heat exchange between the air and the hot air heater 32 and is efficient. Ground to heat the air. Therefore, the reduction of the air volume due to the pressure loss is small, and a high-efficiency heating can be performed with a large air volume. Furthermore, even when the baking tray 22 and the food 20 are arranged or the height of the food 20 is changed, it is difficult to be affected. As a result, the hot air can reach the front of the heating chamber 2, Regardless of the shape of the food, it is easy to suppress uneven heating. In addition, since the hot air system flows slightly forward, it is possible to suppress heating of not only the upper and lower wall surfaces but also the left and right wall surfaces. (2) As described above, by using the heating conditioner of this embodiment, it is possible to perform a baking condition with good efficiency that suppresses uneven heating. [Other Structures] Here, in the hot air circulation unit 3 of this embodiment, the shape of the hot air circulation unit cover 33 is set to avoid the general tightening shape of the hot air motor 31, and the tightened shape is adopted. A part of the hot-air motor 31 is arranged inside. Therefore, the thickness of the hot-air circulation unit 3 can be reduced compared to a configuration in which the hot-air-circulation unit cover 33 is not provided with a constricted shape, and the depth of the entire body 1 can be reduced. In this embodiment, the shape or number of the hot-air heaters 32 is not particularly limited, but in this embodiment, since the hot-air heaters 32 are arranged one above and one below the hot-air fans 30, Since two are installed in total, the respective heaters can be driven independently of each other. For example, the lower hot air heater 32 may be driven and the lower side of the baking pan 22, that is, the lowering fire may be enhanced. In order to increase the temperature in the heating chamber 2 rapidly, it is effective to increase the output of the hot air heater 32. Since the power system of a domestic power supply is set to 1500 W, the hot air heater 32 is provided by For a total output of about 1400W, the heating speed can be increased. However, in this case, the hot air heater 32 cannot be driven simultaneously with other heat sources. In this embodiment, since the two hot-air heaters 32 can be driven independently, the single-side hot-air heater 32 and the upper heater 24 can be combined and driven to perform conditioning. . In addition, the shape of the hot air circulation unit cover 33 in this embodiment is the same as that shown in FIG. 5, and a flange-shaped plane is provided near the center of the cover plane 33A and further behind the cover plane 33A. And fix the hot air motor 31 on this plane. As such, as long as the hot air circulation unit cover 33 is provided with at least the cover flat surface 33A and the cover back surface 33B as the cover convex surface, it may be provided with surfaces other than these. [Embodiment 2] The structure of Embodiment 2 of the present invention will be described with reference to Figs. 12 and 13. FIG. 12 is a perspective view of the hot air circulation unit of the heating conditioner of Example 2 viewed from above and from the front. FIG. 13 is a schematic view of the hot air circulation unit shown in FIG. 13 viewed from the side. The heating conditioner of this embodiment is the same as the structure described in Embodiment 1 except for the hot air circulation unit 3. Therefore, the description of the same structure as that of Embodiment 1 will be omitted. In this embodiment, the shape of the cover convex surface 33C in the hot air circulation unit cover 33 is different from that of the first embodiment. Specifically, in the first embodiment, the cover plane 33A is slightly quadrangular, but in the second embodiment, it is a constricted shape including the cover convex surface 33C, and the cross section when viewed from the front side is slightly A circular shape is a shape that does not have a flat curved surface. Compared with Embodiment 1, the shape of the cover convex surface 33C is different. Therefore, the direction of the air flow around the hot air fan 30 is different. However, by generating from the hot air fan 30, the air flow through the inter-wing air path 30B is different. The air flow is the same as in Example 1, and the effect of supplying hot air to the front just in the heating chamber can be obtained. As such, the shape of the cover convex surface 33C may be any shape as long as it is provided closer to the heating chamber 2 side than the cover back surface 33B. In addition, by increasing the tightening depth of the cover back surface 33B to increase the distance between the cover convex surface 33C and the cover back surface 33B, the air path impedance system inside the hot air circulation unit 3 is reduced, and thus, the system The effect of increasing the circulating air volume of hot air. As described above, in this embodiment, as long as the cover is provided with a cover convex surface 33C on the heating chamber 2 side and a cover back surface 33B behind it, and the air flows in the axial direction of the hot air fan 30, A structure in which an air path is provided behind the hot-air fan 30, and air is appropriately flowed to the hot-air heater 32, and hot air is supplied to the front of the heating chamber 2. The shape of the hot-air circulation unit cover 33 is no matter what shape Both. [Embodiment 3] The structure of Embodiment 3 of the present invention will be described with reference to Fig. 14. FIG. 14 is a perspective view of the hot air circulation unit of the heating conditioner of Example 3 viewed from the front and above. The heating conditioner of this embodiment is the same as the structure described in Embodiment 1 except for the hot air circulation unit 3. Therefore, the description of the same structure as that of Embodiment 1 will be omitted. In this embodiment, the shape of the hot-air heater 32 in the hot-air circulation unit 3 and the shape of the cover plane 33A are different from those of the first embodiment. Specifically, in the first embodiment, the hot-air heater 32 is a heater having a substantially straight shape, and the hot-air heater 32 is arranged above and below and two are arranged. However, the hot-air heater 32 of the third embodiment is 1 Slightly rounded heater. The cover plane 33A of the first embodiment has a substantially rectangular shape. However, in the third embodiment, the cover plane 33A has a substantially circular shape. Since the cover plane 33A is slightly circular, and the hot air heater 32 is also slightly round, the airflow generated by the hot air fan 30 uniformly contacts the hot air heater 32, and as a The entire hot-air heater 32 is configured to efficiently perform heat exchange. As described above, in this embodiment, the shape and number of the hot air heaters 32 are not limited as long as they are arranged on the hot air flow path flowing from the hot air fan 30 to the hot air blowing outlet 34.

1‧‧‧ Ontology

10‧‧‧Box Room

11‧‧‧ gate

2‧‧‧ heating chamber

20‧‧‧ Food

21‧‧‧ Shed

22‧‧‧ Bakeware

23‧‧‧Table

24‧‧‧ Upper heater

3‧‧‧Hot air circulation unit

3A‧‧‧Flow Road

30‧‧‧ hot air fan

30A‧‧‧Hot Air Fan Wing

30Aa‧‧‧wing tilt angle

30B‧‧‧Wing channel

30C‧‧‧ Hub Surface

30L‧‧‧ Outer diameter of hot air fan

31‧‧‧Hot air motor

32‧‧‧ hot air heater

320‧‧‧ Center of Hot Air Heater

33‧‧‧Hot air circulation unit cover

33A‧‧‧Cover plane

33B‧‧‧Cover back

33C‧‧‧Cover convex

33D‧‧‧ Cover inclined surface

33E‧‧‧Hot wind guide surface

33AL‧‧‧ Dimension of outer diameter of cover plane

33DL‧‧‧ Outer diameter

34‧‧‧ hot air outlet

35‧‧‧ hot air suction port

36‧‧‧wind vane

4‧‧‧machine room

40‧‧‧Magnetron

41‧‧‧ Guided Wave Tube

42‧‧‧ rotating antenna

43‧‧‧ Antenna Motor

[FIG. 1] It is the schematic diagram which observed the heating conditioner body of Example 1 from the right. [Fig. 2] is a schematic view of the heating conditioner body of Fig. 1 viewed from the front side. [Fig. 3] is a perspective view of the hot air circulation unit of the heating conditioner of Fig. 1 viewed from the front side to the right. [Fig. 4] is a front view of the hot air circulation unit of Fig. 3 viewed from the front side. [Fig. 5] is a schematic view in which the A-A 'section of the hot air circulation unit in Fig. 3 is viewed from the right. [Figure 6] is a perspective view of one example of a hot air fan viewed from the front side to the right. [Fig. 7] It is a schematic diagram for observing the baking conditioning (the two-stage conditioning of the upper stage and the lower stage) of Example 1 from the front side. [Fig. 8] It is a schematic diagram for observing the baking conditioning (the two-stage conditioning of the upper stage and the lower stage) of Example 1 from the right side. [Fig. 9] It is a schematic diagram for observing the baking conditioning (the middle stage and the lower stage of the two stages) of Example 1 from the front side. [Fig. 10] It is a schematic diagram for observing the baking conditioning (the middle stage and the lower stage of the two stages) of Example 1 from the right side. [Fig. 11] is a perspective view of the heating conditioner body of Fig. 1 viewed from the front side to the right. [Fig. 12] is a perspective view of the hot air circulation unit of the heating conditioner of Example 2 viewed from the front to the right. [Fig. 13] is a schematic view of the hot air circulation unit in Fig. 12 viewed from the right. [Fig. 14] is a perspective view of the hot air circulation unit of the heating conditioner of Example 3 viewed from the front to the right.

Claims (6)

A heating conditioner is provided with a heating chamber for storing food and a hot air circulation unit disposed behind a square wall surface behind the heating chamber. The heating conditioner is characterized by: the aforementioned hot air circulation unit is provided with: heating A hot air heater for air; a hot air fan for circulating the air in the heater; and a hot air motor for driving the hot air fan; and the hot air heater and the hot air fan are arranged on the heating chamber side, and are arranged on the back side of the body The hot-air circulation unit cover having the aforementioned hot-air motor, The hot-air circulation unit cover is provided with: a convex surface of a cover which is disposed at a slightly central position and surrounds a rotating shaft connecting the hot-air fan and the hot-air motor; and a convex surface surrounding the cover And a sloping surface of the hood inclined from the convex surface of the cover toward the rear; and a rear surface of the cover surrounding the inclined surface of the cover and positioned further rearward than the convex surface of the cover; Guide surface The diameter is smaller than the outer diameter of the hot-air fan, and the convex surface of the cover is more than 10mm projected toward the hot-air fan side or the height of the hot-air guide surface compared to the back of the cover. More than 1/3 of the outstanding. A heating conditioner is provided with a heating chamber for storing food and a hot air circulation unit disposed behind a square wall surface behind the heating chamber. The heating conditioner is characterized by: the aforementioned hot air circulation unit is provided with: heating A hot air heater for air; a hot air fan for circulating the air in the heater; and a hot air motor for driving the hot air fan; and the hot air heater and the hot air fan are arranged on the heating chamber side, and are arranged on the back side of the body The hot-air circulation unit cover having the aforementioned hot-air motor, The hot-air circulation unit cover is provided with: a convex surface of a cover which is disposed at a substantially central position and surrounds a rotating shaft connecting the hot-air fan and the hot-air motor; And a sloping surface of the hood inclined from the convex surface of the cover toward the rear; and a rear surface of the cover surrounding the inclined surface of the cover and positioned further rearward than the convex surface of the cover; and a hot air surrounding the rear of the cover and directing hot air to the front Guide surface Inner diameter than the outer diameter of the system and the hot air fan is smaller, the outer diameter of the inclined surface of the cap, the line representing the outer diameter of the larger hot-air fan. The heating conditioner according to item 1 or item 2 of the patent application scope, wherein the hot air fan is a wing and a hub surface integrally formed with the wing, and the wing inclination angle formed by the two , Set to 90 degrees or more. The heating conditioner as described in any one of claims 1 to 3, wherein the outer diameter of the hot-air motor when the hot-air circulation unit is observed from the front is set to be smaller than The outer diameter of the convex surface of the cover is smaller. The heating conditioner according to any one of claims 1 to 4 of the scope of application for a patent, wherein the hot air blowing outlets are arranged side by side on the square wall surface behind the heating chamber, which is slightly horizontal, compared with the hot air. The height center of the heater is arranged on the upper and lower outer sides with respect to the hot-air fan. The heating conditioner according to any one of claims 1 to 5, wherein the convex surface of the cover is a flat surface or a curved surface.