JP6860374B2 - Cooker - Google Patents

Description

The present invention relates to a cooking device such as a steam convection oven, and relates to a cooking device that heats the inside of a cooking chamber with a combustion gas obtained by burning a mixed gas.

Patent Document 1 discloses a cooking cooker that cooks foodstuffs with hot air containing steam, and the cooking cooker uses a cooking chamber for cooking the foodstuffs and a combustion gas in the cooking chamber. It is equipped with a combustion device for heating, a convection fan for convection of air in the kitchen, and a steam generator for supplying steam to the kitchen. The combustion device includes a heating tube that heats the inside of the cooking chamber by passing the combustion gas, and a burner that sends the combustion gas to the heating tube. The heating tubes were arranged in a substantially C shape with the front side open along the periphery of the left wall of the kitchen, around the fan blades of the convection fan rotatably provided in the center of the left wall of the kitchen. It is provided with an outward route portion, a folded-back portion that folds back the tip of the outward route portion at the front portion of the left wall of the kitchen, and a return route portion that is arranged along the outward route portion from the folded-back portion. By passing the combustion gas from the combustion burner through the heating tube and rotating the fan blades of the fan device, the hot air heated by the heating tube convects inside the cooking cabinet, and the ingredients in the cooking cabinet are cooked by the hot air. Will be done.

Japanese Unexamined Patent Publication No. 2013-200111

The above-mentioned cooking cooker described in Patent Document 1 has a size capable of accommodating 6 trays in the kitchen, but a large one capable of accommodating 10 trays in the kitchen has also been developed. Has been done. Since a large cooking cooker has a large internal capacity of the cooking cabinet, the heat exchange of the heating tube can be performed simply by reciprocating the heating tube along the left side wall between the outward path, the folding section, and the return path as described above. The surface area may be insufficient to sufficiently heat the inside of the cooking chamber. On the other hand, if a folding portion is provided at the tip of the return path portion of the heating tube so that the heating tube can be folded back toward the cooking cabinet, and a return path portion is further provided from the folding portion, the surface area for heat exchange of the heating tube is sufficient. Although it can be secured, there is a problem that the inside of the kitchen becomes narrow. It was also considered to bend the entire heating tube finely in a bellows shape to increase the surface area for heat exchange of the heating tube, but if the heating tube is finely bent in a bellows shape over the entire length, the heating tube is cooked. There was a risk that it could not be held in a shape that fits the circumference of the left wall of the warehouse. In this case, if the bellows-shaped bent heating tube is fixed to the left wall of the cooking cabinet at a plurality of locations along the longitudinal direction, the heating tube can be held in a shape along the peripheral portion of the left wall of the cooking cabinet. .. However, when the heating tube is fixed to the left wall of the kitchen, stress is applied to the heating tube due to the deformation caused by expansion and contraction due to the combustion gas, so it was not appropriate to fix the heating tube to the left wall of the kitchen. .. An object of the present invention is to increase the surface area for heat exchange of the heating tube while allowing the heating tube to be held in a shape along the side wall of the cooking cabinet.

In order to solve the above problems, the present invention is arranged around a cooking cabinet for cooking foods, fan blades provided on one side wall of the cooking cabinet, and fan blades on one side wall of the cooking cabinet. , A cooking cooker provided with a heating tube that heats the kitchen by passing combustion gas, and the heating tube is an outward path portion arranged along one side wall of the kitchen and a tip portion of the outward path portion. It is provided with a folded portion provided in the above and a return portion arranged along the outward route portion from the folded portion. The outward route portion is composed of at least one of a straight pipe portion and a curved pipe portion, and the return route portion is bent in a bellows shape. The present invention provides a cooking cooker characterized in that a bellows portion is provided and a holding bracket for holding a return portion is provided on the outward route portion.

In the heating cooker configured as described above, the outward path portion of the heating tube is composed of at least one of the straight tube portion and the curved tube portion, and the return path portion is provided with a bellows portion bent in a bellows shape. The outward path portion composed of at least one of the tube portion and the curved tube portion can maintain the shape of the heating tube along one side wall of the kitchen, and the bellows portion of the return path can take a large surface area for heat exchange. It has become possible to sufficiently heat the cooker without reducing the capacity of the cooker even if the capacity of the cooker becomes large. Further, since the return path portion is not fixed to one side wall of the cooking cabinet, stress cannot be applied to the return path portion even if the return path portion is deformed due to expansion or contraction.

In the cooking cooker configured as described above, the introduction end of the outward path portion of the heating pipe is fixed to one side wall of the cooking cabinet from the cooking cabinet side, and combustion gas is supplied to the heating pipe from the outside of the cooking cabinet. An annular bracket for fixing the burner is provided, the introduction end of the outward path portion of the heating pipe is fixed to the kitchen side of the annular bracket via an annular seal member, and an annular seal is provided on the outside of the kitchen of the annular bracket. preferably fixed a bar burner through the member. In this case, it is possible to prevent the hot air in the cooking cabinet from flowing into the introduction end of the outward path portion of the heating pipe, and it is possible to prevent the hot air in the cooking cabinet from leaking from one side wall to the outside.

It is a front view of one Embodiment of the cooking apparatus of this invention. It is a left side view with the left side wall of a housing removed. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is sectional drawing of the part which attached the burner and the heating tube of the left side wall of a cooker. It is a perspective view of FIG. It is a block diagram of a control device.

Hereinafter, an embodiment of the cooking device of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the cooking cooker 10 includes a cooking chamber 12 for cooking foodstuffs in the housing 11 and a machine room 13 in the space excluding the cooking chamber 12 in the housing 11. ..

The kitchen 12 is for accommodating foodstuffs and cooking the stored foodstuffs. In this embodiment, the cooking cabinet 12 has a size capable of accommodating 10 trays up and down. An opening for taking in and out food is provided on the front surface of the cooking cabinet 12, and the opening on the front surface is opened and closed by the door 14. The outer peripheral surface of the cooking cabinet 12 is covered with a heat insulating material, so that the heat inside the cooking cabinet 12 is not easily transferred to the outside of the machine room 13 and the housing 11.

As shown in FIGS. 2 and 3, the cooking cooker 10 includes a convection fan 15 for convection of air in the cooking cabinet 12, a temperature sensor 16 for detecting the temperature in the cooking cabinet 12, and the inside of the cooking cabinet 12. A combustion device 20 for heating and a steam generator 30 for generating steam in the cooking chamber 12 are provided. The convection fan 15 convects the air in the kitchen 12, and the convection fan 15 has fan blades 15a in the kitchen 12 and a fan motor 15b of the convection fan 15 in the machine room 13. The fan blades 15a are rotated by the operation of the fan motor 15b, and the air in the kitchen 12 is convected by the rotation of the fan blades 15a.

As shown in FIGS. 2 and 3, the combustion device 20 heats the inside of the kitchen 12 with the combustion gas when the mixed gas of the combustion air and the fuel gas is burned. The combustion device 20 includes a blower fan 21, a gas supply pipe 22, and a mixing pipe 23, which are the main components in the machine room 13, and a burner 24 and a heating pipe 25 in the cooking chamber 12.

As shown in FIG. 2, the blower fan 21 supplies combustion air, and the blower fan 21 is arranged in the upper part on the front side of the machine room 13. The blower fan 21 has an air intake port arranged on the side of the cooking cabinet 12, and the air outlet of the blower fan 21 is connected to the mixing pipe 23 by a blower pipe 21a. The combustion air sucked from the intake port of the blower fan 21 is supplied to the mixing pipe 23 by the blower pipe 21a. A gas supply pipe 22 to which fuel gas is supplied from the gas supply source is connected to the mixing pipe 23, and the fuel gas of the gas supply source is supplied to the mixing pipe 23 by the gas supply pipe 22. A gas valve 22a is interposed in the gas supply pipe 22, and fuel gas is supplied from the gas supply pipe 22 to the mixing pipe 23 when the gas valve 22a is opened. A pressure equalizing valve 22b is interposed in the gas supply pipe 22, and the pressure equalizing valve 22b is connected to the blower pipe 21a by the pressure detecting pipe 22c. The pressure equalizing valve 22b is opened at an opening degree corresponding to the pressure of the air supplied from the blower fan 21 through the blower pipe 21a to the mixing pipe 23, and the air volume of the fuel gas supplied from the gas supply pipe 22 to the mixing pipe 23 ( Flow rate) is adjusted according to the air volume of the combustion air.

As described above, the combustion air sent out from the air outlet of the blower fan 21 and the fuel gas sent out from the gas supply pipe 22 are supplied to the mixing pipe 23, and the combustion air and the fuel air are combined with each other. It is mixed to become a mixed gas. A burner 24 is connected to the mixing pipe 23 on the other end side opposite to the one end side to which the blower pipe 21a and the gas supply pipe 22 are connected, and the mixed gas supplied from the mixing pipe 23 is burned by the burner 24. It becomes a high-temperature combustion gas.

As shown in FIGS. 2 and 4, the base end portion of the burner 24 is provided with a burner mounting flange 24a for mounting on the left side wall (one side wall) of the cooking cabinet 12, and is provided on the left side wall of the cooking cabinet 12. An annular bracket 12a for attaching the burner 24 is fixed to the upper front part. The burner 24 is inserted into the heating pipe 25 arranged in the kitchen 12 from the opening at the center of the annular bracket 12a, and the burner mounting flange 24a is attached to the annular bracket 12a by a screw on the machine room 13 side. There is. Further, a heat-resistant annular sealing member 24b is interposed between the annular bracket 12a and the burner mounting flange 24a, and the sealing member 24b prevents the combustion gas passing through the heating pipe 25 from leaking to the machine room 13. I'm preventing it.

The heating pipe 25 heats the inside of the cooking chamber 12 by passing the combustion gas from the burner 24. As shown in FIGS. 3 and 4, the heating tube mounting flange 26 is fixed to the introduction end portion 25a of the heating tube 25, and the heating tube mounting flange 26 is attached to the annular bracket 12a on the left side wall of the cooking cabinet 12. Has been done. Further, a heat-resistant annular sealing member 26a is interposed between the annular bracket 12a and the heating tube mounting flange 26, and the sealing member 26a is provided with hot air containing steam in the cooking room 12 and inside the heating tube 25. It prevents leakage to the machine room 13.

As shown in FIGS. 3 and 5, the heating pipe 25 is arranged along the introduction end portion 25a attached to the front upper part of the left side wall of the cooking oven 12 and the introduction end portion 25a along the left side wall of the cooking oven 12. The outbound route portion 25b is provided, the folded-back portion 25c folded back at the tip of the outward path portion 25b, and the return path portion 25d arranged from the folded-back portion 25c along the outward path portion 25b. The introduction end portion 25a is made of a metal pipe member thicker than the outward path portion 25b, the folded-back portion 25c, and the return path portion 25d, and the burner 24 is housed in the introduction end portion 25a. The outward path portion 25b is a combination of a straight pipe portion extending linearly and a curved pipe portion extending in a curved shape such as an arc, and is formed on the upper edge portion, the trailing edge portion, and the lower edge portion which are the peripheral portions of the left side wall of the cooking cabinet 12. It extends along. A folded-back portion 25c is continuously provided at the tip end portion of the outward route portion 25b, and the folded-back portion 25c is formed by bending the tip end portion of the outward route portion 25b inside the cooking cabinet 12 and folding it back. A return path portion 25d is continuously provided in the folded-back portion 25c, and the return path portion 25d is arranged along the outward path portion 25b to the rear upper part of the cooking cabinet 12. The return path portion 25d includes a bellows portion 25d1 that bends in a bellows shape, and the bellows portion 25d1 has a larger surface area in the length direction than the outward path portion 25b composed of a straight pipe portion and a curved pipe portion, and the surface area of the passing combustion gas is increased. It has a function to enhance the heat exchange function. The lead-out end 25d2 of the return path portion 25d is connected to a chimney portion 27 arranged on the rear ceiling wall of the cooking cabinet 12, and the combustion gas passing through the heating pipe 25 is discharged to the upper side of the housing 11 by the chimney portion 27. To.

As shown in FIGS. 3 and 5, a holding bracket 28 made of a sheet metal member is provided in a portion arranged at the rear upper part of the cooking cabinet 12 of the outward route portion 25b, and after the cooking cabinet 12 of the returning route portion 25d. The portion arranged at the upper part is held by the holding bracket 28 in the outward path portion 25b. Since the return path portion 25d is held by the holding bracket 28 on the outward path portion 25b without being fixed to the left wall of the cooking cabinet 12, stress is less likely to be applied even if the return path portion 25d is deformed due to expansion or contraction. There is. Further, since the holding bracket 28 is provided at a position away from the folded-back portion 25c of the outward path portion 25b and the return path portion 25d, even if the outward path portion 25b and the return path portion 25d expand or contract, the outward path portion 25b and the return path portion 25d Is expanded or contracted in the longitudinal direction, so that stress is less likely to be applied to the outward path portion 25b and the return path portion 25d.

As shown in FIGS. 3 and 5, support wires 29 for supporting the return path portion 25d are provided at the lower and rear portions of the left side wall of the cooking cabinet 12, and the return path portion 25d is provided with the support wire 29 together with the holding bracket 28. Is also supported. The support wire 29 is made of a deformable metal wire, and the return path portion 25d is supported by the support wire 29 in a state where it can be slightly moved. Therefore, even if the return path portion 25d expands or contracts along the longitudinal direction, stress is less likely to be applied to the return path portion 25d.

As shown in FIG. 2, a steam generator 30 for supplying steam into the cooking chamber 12 is provided at the rear of the machine room 13. The steam generator 30 includes a steam generator 31 that stores water at a predetermined water level, and a heater (not shown) is provided in the steam generator 31. The heater heats the water in the steam generating container 31 by passing the combustion gas, and similarly to the combustion device 20 for heating the inside of the cooking chamber 12, a mixed gas of combustion air and fuel gas is used. The burned combustion gas passes through, and the passing combustion gas heats the water in the steam generation container 31.

A steam delivery cylinder 32 is provided above the steam generation container 31, and the steam generation container 31 is connected to the cooking chamber 12 by the steam delivery cylinder 32. The steam generated in the steam generating container 31 is guided into the cooking chamber 12 by the steam delivery cylinder 32. A water level detection container 33 is fixed to the outside of the steam generation container 31, and a float switch (not shown) is provided inside the water level detection container 33. The lower part of the water level detection container 33 is connected to the lower part of the steam generation container 31, and the float switch detects a predetermined water level in the steam generation container 31 by detecting a predetermined water level in the water level detection container 33. is there. A water supply pipe 34 derived from a water supply source such as water supply is connected to the water level detection container 33, and a water supply valve 35 is interposed in the water supply pipe 34. When the water supply valve 35 is opened, water from a water supply source such as tap water is sent from the water supply pipe 34 to the water level detection container 33, and is sent to the steam generation container 31 via the water level detection container 33. Further, the water level detection container 33 is led out from the bottom of the cooking cabinet 12 and is arranged at a position close to the exhaust pipe 17 provided upright in the machine room 13, and the water in the water level detection container 33 is exhausted. It is warmed by warm air containing steam passing through the tube 17.

A control device 40 for controlling the operation of the heating cooker 10 is provided in the machine room 13, and as shown in FIG. 6, the control device 40 includes a convection fan 15 (particularly a fan motor 15b), a temperature sensor 16, and the like. It is connected to the combustion device 20 and the steam generator 30. The control device 40 has a microcomputer (not shown), and the microcomputer includes a CPU, RAM, ROM, and a timer (all of which are not shown) connected via a bus. The control device 40 includes a cooking program in which the ingredients in the kitchen 12 are cooked in the ROM. The cooking program consists of a hot air mode cooking program in which the convection fan 15 and the combustion device 20 are operated to heat and cook the food by the convection hot air, and the convection fan 15 and the steam generator 30 are operated to operate the convection steam to cook the food. It consists of three modes: a steam mode cooking program that cooks by heating, and a combination mode cooking program that heats and cooks ingredients with hot air containing confluent steam by operating a convection fan 15, a combustion device 20, and a steam generator 30. It has a cooking program.

The operation when the combination mode cooking program is executed by the cooking cooker 10 will be described. When operating the combustion device 20 for heating the cooking chamber 12, the gas valve 22a is first opened to operate the fan motor of the blower fan 21. Combustion air is introduced from the blower pipe 21a to the mixing pipe 23 by the operation of the blower fan 21, and the fuel gas whose air volume is adjusted according to the supply pressure of the combustion air of the blower pipe 21a is supplied by the pressure equalizing valve 22b. It is introduced from the pipe 22 to the mixing pipe 23. A mixed gas in which combustion air and fuel gas are mixed is sent from the mixing pipe 23 to the burner 24, and this mixed gas is burned by the burner 24 to become a combustion gas. The combustion gas is exhausted to the outside of the housing 11 through the heating pipe 25. At this time, the air around the heating pipe 25 in the cooking chamber 12 is heated by heat exchange with the combustion gas passing through the heating pipe 25, and the heated air is combined with hot air by the rotation of the fan blades 15a of the convection fan 15. Then convection in the kitchen 12. Further, in the steam generator 30, the water in the steam generator 31 is heated by the combustion gas produced by the combustion device to become steam, and the steam in the steam generator 31 is guided into the cooking chamber 12 by the steam delivery cylinder 32. As described above, the steam guided into the kitchen 12 is convected in the kitchen 12 together with the hot air from the combustion device 20 and the convection fan 15, and the foodstuffs in the kitchen 12 are cooked by the hot air containing steam.

In the cooking cooker 10 configured as described above, the heating pipe 25 provided on the left side wall (one side wall) of the cooking cabinet 12 has an outward path portion 25b arranged along the left side wall of the cooking cabinet 12 and an outward path portion. It includes a folded-back portion 25c provided at the tip end portion of the 25b, and a return path portion 25d arranged along the outward route portion 25b from the folded-back portion 25c. The outward path portion 25b of the heating tube 25 is composed of a straight tube portion and a curved tube portion, and a bellows portion 25d1 bent in a bellows shape is provided on the return path portion 25d of the heating pipe 25. As a result, the outward passage portion 25b composed of the straight pipe portion and the curved pipe portion keeps the shape of the heating pipe 25 along the peripheral portion of the left side wall of the cooking cabinet 12, and the bellows portion 25d1 of the return passage portion 25d. Therefore, the surface area for heat exchange can be increased, and even if the internal capacity of the cooking cabinet 12 is increased, the cooking chamber 12 can be sufficiently heated without reducing the capacity of the cooking cabinet 12.

Further, the outward path portion 25b is provided with a holding bracket 28 for holding the return path portion 25d. Since the return path portion 25d is held by the holding bracket 28 on the outward path portion 25b without being fixed to the left wall of the cooking cabinet 12, stress is applied to the return path portion 25d even if the return path portion 25d is deformed due to expansion or contraction. I was able to make it difficult to join. Further, since the holding bracket 28 is provided at a position away from the folded-back portion 25c of the outward path portion 25b and the return path portion 25d, even if the outward path portion 25b and the return path portion 25d expand or contract, the outward path portion 25b and the return path portion 25d Expands or contracts in the longitudinal direction, so that stress can be less likely to be applied to the outward path portion 25b and the return path portion 25d.

On the left side wall of the cooking cabinet 12, the introduction end portion 25a of the outward path portion 25b of the heating pipe 25 is fixed from the cooking cabinet 12 side, and the burner 24 that supplies combustion gas to the heating pipe 25 from the outside of the cooking cabinet 12 is fixed. An annular bracket 12a is provided. A heating pipe mounting flange 26 provided at the introduction end 25a of the outward path portion 25b is fixed to the cooking chamber 12 side of the annular bracket 12a via an annular sealing member 26a, and an annular shape is provided on the outside of the cooking chamber 12 of the annular bracket 12a. The burner mounting flange 24a of the burner 24 was fixed via the seal member 24b of the above. As a result, the burner 24 and the heating tube 25 can be separately attached to the annular bracket 12a of the cooking chamber 12, and the attachment work of the burner 24 and the heating tube 25 can be facilitated. Further, the sealing member 26a on the inside of the cooking cabinet 12 can prevent the hot air in the cooking cabinet 12 from flowing into the introduction end portion 25a of the outward path portion 25b of the heating pipe 25, and the seal on the outside of the cooking cabinet 12 can be prevented. The member 24b made it possible to prevent the hot air in the cooking chamber 12 from leaking from the left wall to the outside.

The outward passage portion 25b of the heating pipe 25 of the above embodiment is composed of a straight pipe portion and a curved pipe portion, but the present invention is not limited to this, and the outward passage portion 25b is a straight pipe portion or a curved pipe portion. It may be composed of only.

In the cooking device 10 of the above embodiment, the fan blades 15a and the heating pipe 25 are provided on the left side wall as one side wall of the cooking cabinet 12, but the present invention is not limited to this, and the fan blades 15a are not limited to this. And the heating tube 25 may be provided on the rear side wall or the right side wall.

10 ... heat cooker, 11 ... housing, 11 ... annular bracket, 12 cooker, 15a ... fan blades, 24 ... burner, 24b ... seal member, 25 ... heating tube, 25a ... introduction end, 25b ... outbound, 25c ... Folded part, 25d ... Return path part, 25d1 ... Bellows part, 26a ... Seal member, 28 ... Holding bracket.

Claims (2)

A kitchen for cooking ingredients and
A fan blade provided on one side wall of the kitchen and
A cooker provided around the fan blades on one side wall of the cooker and provided with a heating tube for heating the cooker by passing combustion gas through the cooker.
The heating pipe includes an outward path portion arranged along one side wall of the cooking cabinet, a folded-back portion provided at the tip of the outward-passing portion, and a return path portion arranged from the folded-back portion along the outward path portion. With and
The outbound route portion is composed of at least one of a straight pipe portion and a curved pipe portion.
A bellows portion bent in a bellows shape is provided on the return path portion.
A cooking cooker characterized in that a holding bracket for holding the return path portion is provided on the outward path portion. In the cooking apparatus according to claim 1,
An annular bracket for fixing the introduction end of the outward path portion of the heating pipe from the cooking cabinet side to one side wall of the cooking cabinet and fixing a burner for supplying combustion gas to the heating pipe from the outside of the cooking cabinet. Set up,
The introduction end of the outward path portion of the heating pipe is fixed to the cooking chamber side of the annular bracket via an annular seal member.
Cooker outside of the cooking chamber of the annular bracket, characterized in that fixing the fangs over Na prior via an annular seal member.

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