JP7063460B2 - Steam heating unit, steam heating method, confectionery manufacturing equipment and confectionery manufacturing method - Google Patents

Description

The present invention relates to a steam heating unit, a steam heating method, a confectionery manufacturing apparatus, and a confectionery manufacturing method. More specifically, it relates to a steam heating unit, a steam heating method, a confectionery manufacturing device, and a confectionery manufacturing method that suppress the temperature drop of steam with a simple structure and rectify the steam to suppress heating unevenness due to uneven humidification. be.

A cooking method called "steaming" that heats using high-temperature steam is generally known, and is widely used as a cooking method such as "dim sum" and "chawanmushi".

On the other hand, not limited to the above cooking, in general, when steam circulates in a route such as a pipe, the temperature tends to gradually drop due to the resistance of the pipe, so the temperature is constant close to the temperature of the steam of the supply source. There was the problem that it was difficult to continue to supply steam.

Further, since the steam generated in the boiler circulates in the pipe so as to spring up, the density and pressure of the steam are uneven and not uniform. When such uneven steam is directly sprayed on food, for example, there are a portion where a required amount of steam is sufficiently sprayed and a portion where the required amount of steam cannot be sufficiently sprayed. When food is cooked in this state, the degree of baking differs depending on the location of the food, uneven heating is likely to occur, and the quality of the food may deteriorate.

Therefore, in order to keep the steam at a constant temperature, as described in Patent Document 1, a "steam supply device and a steam supply method" that reliably supplies steam at an appropriate temperature using a heat exchanger have been proposed. ing. Specifically, the steam for a heat medium supplied from the boiler flows into the main heat exchanger, exchanges heat with the water in the heat transfer tube, and heats the water to generate steam. Then, the steam flowing out from the main heat exchanger flows into the auxiliary heat exchanger and is further heated by the steam for the heat medium flowing in the heat medium pipeline in the auxiliary heat exchanger. As a result, the steam can be gradually heated step by step, so that the occurrence of temperature unevenness and the like can be surely achieved and the temperature distribution can be equalized, and the steam in a stable state can be supplied. ..

Further, as described in Patent Document 2, a straightening vane is provided near the outlet, and a part of the air flow moving along the downdraft in the ventilation space is guided from the heating portion to the heating space. "Temperature control device" has been proposed.
Specifically, when the hot air heated in the temperature control device is discharged, a part of the air flow moving along the downdraft in the ventilation space is guided from each outlet to the heating space by the rectifying plate. Then, the object to be heated in the heating space can be heated.

Japanese Unexamined Patent Publication No. 2017-198439 Japanese Unexamined Patent Publication No. 2017-196232

However, the "steam supply device and steam supply method" described in Patent Document 1 becomes a large-scale device, and it is difficult to use it in a limited space.

Further, in the "food temperature control device" described in Patent Document 2, it is possible to guide the air flow to the outlet, but the air flow is rectified and the steam density and pressure are made uniform. Therefore, uneven heating may occur due to uneven humidification.

The present invention was devised in view of the above points, and is a steam heating unit and steam heating unit that suppresses the temperature drop of steam with a simple structure and suppresses heating unevenness due to humidification unevenness by rectifying steam. It is an object of the present invention to provide a method, a confectionery manufacturing apparatus, and a confectionery manufacturing method.

In order to solve the above-mentioned problems, the steam heating unit of the present invention is arranged so as to surround the trunk pipe through which steam flows and the trunk pipe having a plurality of branches from the trunk pipe to surround the trunk pipe, and to change the flow direction of the steam. A first heating unit that has a distribution direction changing unit to be changed and a ejection hole from which the steam whose distribution direction has been changed is ejected, and the steam circulating inside is heated by an external heat source. , And a branch pipe having a second heating portion for heating the steam in the trunk pipe with the steam heated in the first heating portion, and the first heating portion. It is provided with a heating body that heats the steam in contact with the steam ejected from the ejection hole.

Here, the steam can be circulated in the trunk pipe by the trunk pipe through which the steam flows.

Further, the steam circulated in the trunk pipe can be circulated in the branch pipe by the branch pipe branched from the trunk pipe into a plurality of branches.

Since the branch pipe is arranged so as to surround the trunk pipe and the trunk pipe and the branch pipe are in close proximity to each other, the steam heated in the first heating unit and circulates in the branch pipe is discharged. The temperature is higher than the steam flowing in the trunk pipe. As a result, the heat generated from the branch pipe near the trunk pipe is easily transferred to the trunk pipe, and the steam circulating in the trunk pipe is heated, so that the temperature drop due to the pipe resistance when the steam flows can be suppressed. It is possible to suppress the temperature drop of steam with a simple structure without using a large-scale equipment such as a dedicated heating device.

Further, since the branch pipe has a flow direction changing section for changing the steam flow direction, the steam flow direction can be changed, and the steam is agitated at the flow direction changing section to alleviate unevenness in density and pressure. Therefore, the flow of steam generated in the boiler can be rectified.

In addition, the branch pipe having an ejection hole for ejecting the same steam whose distribution direction has been changed in the distribution direction changing section suppresses the rectified steam flowing in the branch pipe from being ejected from the ejection hole to cause uneven humidification. Therefore, uneven heating is unlikely to occur.

Further, since the steam can be heated by the external heat source by the first heating unit that heats the steam flowing inside by the external heat source, the temperature drop of the steam can be suppressed.

Then, the second heating section, which heats the steam in the trunk tube with the steam heated in the first heating section, heats the steam circulating in the trunk tube whose temperature has dropped in the process of distribution. Therefore, it is possible to suppress the temperature drop of steam with a simple structure without using a large-scale facility such as a dedicated heating device.

Further, the steam ejected from the ejection hole is discharged to the outside of the branch pipe by the warming body which is heated by the first heating portion and is in contact with the steam ejected from the ejection hole to heat the steam. Since it is possible to heat the steam whose temperature has dropped by lowering the pressure and exchanging heat with the outside air whose temperature is lower than that of the steam, it is possible to suppress the temperature drop of the steam with a simple structure without making it a large-scale facility. can.

Further, when the heat source is a heating body and the heating body is heated by using steam, the steam heated in the first heating unit is heated by using steam. It can be heated with a simple device without using a large-scale facility such as a dedicated heating device.

Further, in order to solve the above-mentioned problems, the steam heating method of the present invention comprises a first steam flow process for circulating steam in the trunk pipe and the first steam flow step for circulating the inside of the trunk pipe. A second steam flow process in which steam is branched from the main pipe and circulated in a branch pipe arranged so as to surround the main pipe, and a second steam flow step in which the steam is branched from the main pipe and the branch is made. In the steam flow direction changing step of changing the flow direction of the steam flowing in the pipe and the steam flowing in the branch pipe by changing the flow direction in the steam flow direction changing step, the steam flowing in the branch pipe is transferred to the branch pipe and the inside. A first heating step of heating by contacting or bringing the heating steam pipe into contact with or close to the heating steam pipe through which the heating steam flows, and a branch pipe through which the steam heated in the first heating step flows. The second heating step of heating the steam flowing in the trunk pipe by contacting or bringing it into contact with or close to the trunk pipe, and the steam heated in the first heating step and flowing in the branch pipe. It is provided with a third heating step of ejecting from the ejection hole and contacting with the heating steam pipe to heat the heating.

Here, the steam can be circulated in the trunk pipe by the first steam circulation step in which the steam is circulated in the trunk pipe.

Further, in the first steam distribution step, the steam circulating in the trunk pipe is branched from the trunk pipe and distributed in the branch pipe arranged so as to surround the trunk pipe. The steam can be circulated in the branch pipe.

Then, in the steam flow direction changing step of changing the flow direction of the steam branched from the main pipe and flowing in the branch pipe in the second steam flow step, the steam is agitated by changing the steam flow direction, so that the density is high. And unevenness of pressure is alleviated, and the steam flow can be made uniform and rectified.

Further, in the steam flow direction changing process, the steam that has been changed in the flow direction and flows in the branch pipe is heated by contacting or bringing the branch pipe and the heating steam pipe in which the heating steam flows inside into contact with or close to each other. By the first heating step, the steam whose temperature has dropped in the process of flowing through the trunk pipe and the branch pipe can be heated, so that the steam temperature can be heated with a simple structure without making it a large-scale facility. The descent can be suppressed.

In addition, the first heating step is performed by the second heating step in which the branch pipe through which the steam heated in the first heating step flows is brought into contact with or close to the trunk pipe to heat the steam flowing in the trunk pipe. Since the steam circulating in the trunk pipe can be heated by using the steam heated in the heating step, it is possible to suppress the temperature drop of the steam with a simple structure without making it a large-scale facility.

Further, the steam heated in the first heating step and flowing through the branch pipe is ejected from the ejection hole and is ejected from the ejection hole by the third heating step in which the steam is brought into contact with the heating steam pipe to heat the steam. The steam that has been generated is released to the outside of the branch pipe, causing a drop in pressure and heat exchange with the outside air, which has a lower temperature than the steam, so that the steam whose temperature has dropped can be heated, so it is a large-scale facility. It is possible to suppress the temperature drop of steam with a simple structure without doing so.

Further, in order to solve the above-mentioned problems, the confectionery manufacturing apparatus using the heated steam of the present invention has a trunk pipe through which steam flows and a trunk pipe that is branched into a plurality of trunk pipes so as to surround the trunk pipe. It has a flow direction changing section that is arranged and changes the flow direction of the steam, and an ejection hole from which the steam whose flow direction is changed in the flow direction change section is ejected, and the steam that flows inside is externally distributed. A branch pipe having a first heating portion heated by a heat source and a second heating portion for heating the steam in the trunk pipe with the steam heated by the first heating portion, and the above. A steam heating unit having a heating body that is heated by a first heating unit and is in contact with the steam ejected from the ejection hole to heat the steam, and an outside air intake port for taking in outside air. An outside air heating rectification unit having a heating unit for heating the outside air and a first rectifying unit for rectifying the outside air passing through the heating unit, and a heat rectified outside air heated and rectified by the outside air heating rectification unit. A mixed gas release unit that discharges a mixed gas generated by mixing the steam that has passed through the steam heating unit, and a firing unit that fires an object to be fired that has been humidified by the mixed gas at a predetermined temperature. And.

Here, the steam can be circulated in the trunk pipe by the trunk pipe through which the steam flows.

Further, the steam that has flowed through the trunk pipe can be circulated in the branch pipe by the branch pipe that is branched into a plurality of branches from the trunk pipe.

Since the branch pipe is arranged so as to surround the trunk pipe, the heat generated from the trunk pipe is easily transferred to the branch pipe because the trunk pipe and the branch pipe are close to each other, and the steam circulating in the branch pipe is generated. Since it is heated by the heat generated from the trunk pipe, it is possible to suppress the temperature drop of steam due to the pipe resistance when flowing in the branch pipe, and it is not necessary to use a large-scale facility such as a dedicated heating device. , The temperature drop of steam can be suppressed with a simple structure.

Further, since the branch pipe has a flow direction changing section for changing the steam flow direction, the steam flow direction can be changed, and the steam is agitated at the flow direction changing section to alleviate unevenness in density and pressure. Therefore, the flow of steam generated in the boiler can be rectified.

In addition, the steam flowing in the branch pipe can be ejected from the ejection hole by the branch pipe having the ejection hole in which the steam whose distribution direction is changed in the distribution direction changing portion is ejected.

Further, the steam flowing in the path can be heated by the first heating unit that heats the steam flowing in the path from the outside.

Then, the second heating section, which heats the steam in the trunk tube with the steam heated in the first heating section, heats the steam circulating in the trunk tube whose temperature has dropped in the process of distribution. Therefore, it is possible to suppress the temperature drop of steam with a simple structure without using a large-scale facility such as a dedicated heating device.

Further, the ejection hole is further heated by the third heating step in which the steam heated in the first heating step and flowing through the branch pipe is ejected from the ejection hole and brought into contact with the heating steam pipe to heat the steam. The steam ejected from the steam is released to the outside of the branch pipe, causing a decrease in pressure and heat exchange with the outside air, which has a lower temperature than the steam, so that the steam whose temperature has dropped can be heated, which is a large scale. It is possible to suppress the temperature drop of steam with a simple structure without using equipment.

In addition, the steam heating unit having such a trunk pipe, a branch pipe and a heating body can rectify the steam and heat the steam whose temperature has dropped, so that the equipment should be a large-scale facility. It is possible to suppress the temperature drop of steam with a simple structure.

Further, the outside air can be taken into the confectionery manufacturing apparatus by the outside air intake port.

Then, the outside air can be heated to a predetermined temperature by the heating unit that heats the outside air.

Further, the outside air can be rectified by the first rectifying unit that rectifies the outside air.

In addition, the outside air taken in can be rectified and heated to a predetermined temperature by the outside air heating rectifying unit having an outside air intake port, a heating unit, and a first rectifying unit.

Further, by mixing the heated rectified outside air heated and rectified by the outside air heating rectified unit and the steam that has passed through the steam heating unit, the steam can be evenly diffused into the heated rectified outside air. , It is possible to generate a mixed gas that is rectified and has a uniform vapor density.

Then, the mixed gas release unit that releases the mixed gas can release the mixed gas generated by mixing the heated rectified outside air and the steam that has passed through the steam heating unit to the object to be fired for humidification. can.

Further, the appropriately humidified object to be fired can be fired by the firing unit that fires the object to be fired humidified by the mixed gas at a predetermined temperature.

Further, when the steam pressure adjusting means capable of adjusting the pressure of the steam flowing into the trunk pipe, the branch pipe and the heating portion is provided, the steam temperature can be adjusted by adjusting the steam pressure.

Further, when the mixed gas discharge unit has a second rectifying unit for rectifying the mixed gas passing through the inside thereof, the mixed gas can be rectified.

Further, when the mixed gas discharge unit has a wind direction adjusting unit capable of adjusting the wind direction of the mixed gas, the wind direction of the mixed gas can be adjusted. As a result, the mixed gas can be evenly released to the object to be fired without causing a portion where the required amount of steam is sufficiently sprayed and a portion where the required amount of steam cannot be sufficiently sprayed, so that uneven humidification can be suppressed. As a result, it is possible to suppress uneven firing heating that occurs during subsequent firing in the firing section.

Further, in order to solve the above-mentioned problems, the method for producing a confectionery of the present invention is a first steam flow process in which steam is circulated in the trunk pipe, and the steam circulated in the trunk pipe in the first steam flow step. Is branched from the trunk pipe and circulated in the branch pipe arranged so as to surround the trunk pipe, and is branched from the trunk pipe in the second steam flow step. In the steam flow direction changing step of changing the flow direction of the circulating gas and the steam flow direction changing step, the steam that is changed in the flow direction and flows in the branch pipe is heated inside the branch pipe and the inside. The trunk pipe is a branch pipe through which the steam heated in the first heating step is circulated, and a first heating step in which the gas is heated in contact with or close to the heating steam pipe through which the steam is circulated. The second heating step of heating the gas flowing in the trunk pipe in contact with or close to the main pipe, and the steam heated in the first heating step and flowing in the branch pipe is ejected from the ejection hole. The gas has passed through a steam heating flow having a third heating step of contacting with the heating steam pipe to heat the gas, an outside air intake step of taking in outside air, a heating step of heating the outside air, and the heating step. The outside air heating rectification flow having a filtration rectification step of filtering and rectifying the outside air, the heating rectification outside air heated and rectified by the outside air heating rectification flow, and the steam heating flow were used for heating. A release flow having a mixing step of mixing with the steam to generate a mixed gas to be discharged toward the object to be fired, a release step of discharging the mixed gas generated in the mixing step toward the object to be fired, and the above. It is provided with a firing flow for firing a product to be fired humidified by a mixed gas at a predetermined temperature.

Here, the steam can be circulated in the trunk pipe by the first steam circulation step in which the steam is circulated in the trunk pipe.

Further, in the first steam distribution step, the steam circulating in the trunk pipe is distributed in the trunk pipe by the second steam distribution step in which the steam is branched from the trunk pipe and distributed to the branch pipe arranged so as to surround the trunk pipe. The steam can be circulated in the branch pipe.

Then, in the steam flow direction changing step of changing the flow direction of the steam branched from the main pipe and flowing in the branch pipe in the second steam flow step, the steam is agitated by changing the steam flow direction, so that the density is high. And unevenness of pressure is alleviated, and the steam flow can be made uniform and rectified.

Further, in the steam flow direction changing process, the steam that has been changed in the flow direction and flows in the branch pipe is heated by contacting or bringing the branch pipe and the heating steam pipe in which the heating steam flows inside into contact with or close to each other. By the first heating step, the steam whose temperature has dropped in the process of flowing through the trunk pipe and the branch pipe can be heated, so that the steam temperature can be heated with a simple structure without making it a large-scale facility. The descent can be suppressed.

In addition, the first heating step is performed by the second heating step in which the branch pipe through which the steam heated in the first heating step flows is brought into contact with or close to the trunk pipe to heat the steam flowing in the trunk pipe. Since the steam circulating in the trunk pipe can be heated by using the steam heated in the heating step, it is possible to suppress the temperature drop of the steam with a simple structure without making it a large-scale facility.

Further, the steam heated in the first heating step and flowing through the branch pipe is ejected from the ejection hole and is brought into contact with the heating steam pipe to be heated, and is ejected from the ejection hole. The steam that has been generated is released to the outside of the branch pipe, causing a drop in pressure and heat exchange with the outside air, which has a lower temperature than the steam, so that the steam whose temperature has dropped can be heated, so it is a large-scale facility. It is possible to suppress the temperature drop of steam with a simple structure without doing so.

Further, by a steam heating flow having a first steam flow process, a second steam flow process, a steam flow direction changing step, a first heating step, a second heating step, and a third heating step. Since the steam can be rectified and the temperature drop of the steam can be suppressed, the temperature drop of the steam can be suppressed with a simple structure without making a large-scale facility.

Further, the outside air can be taken into the apparatus by the outside air taking-in process.

Then, the outside air can be heated to a predetermined temperature by the heating step of heating the outside air that has passed through the rectification step.

Further, the outside air can be rectified by the filtration rectification step of filtering and rectifying the outside air that has passed through the heating step.

In addition, the taken-in outside air can be rectified and heated to a predetermined temperature by the outside air heating rectification flow having an outside air intake step, a heating step, and a filtration rectification step.

Further, by a mixing step of mixing the heated rectified outside air heated and rectified by the outside air heating rectified flow and the steam heated by the steam heating flow to generate a mixed gas to be discharged toward the object to be fired. , Heat rectification The outside air and steam can be mixed to produce a mixed gas.

Then, the mixed gas can be discharged toward the object to be fired by the discharge step of releasing the mixed gas generated in the mixing step toward the object to be fired.

Further, the discharge flow having the mixing step and the discharging step allows the mixed gas obtained by mixing the heated rectified outside air and the steam heated by the steam heating flow to be discharged toward the object to be fired, so that the gas is uniformly covered. Since it can be discharged toward the fired product, it is possible to prevent uneven heating due to uneven humidification.

In addition, the object to be fired from which the mixed gas is released can be fired by the firing flow in which the object to be fired humidified by the mixed gas is fired at a predetermined temperature.

The steam heating unit, the steam heating method, the confectionery manufacturing apparatus, and the confectionery manufacturing method according to the present invention have a simple structure and suppress the temperature drop of steam, and rectify the steam to suppress uneven heating due to uneven humidification. It is a heating unit, a steam heating method, a confectionery manufacturing device, and a confectionery manufacturing method.

It is a side view explanatory view which shows one Embodiment of the steam heating unit which concerns on this invention. FIG. 1 is an enlarged cross-sectional view taken along the line AA in FIG. It is a front view explanatory view which shows one Embodiment of the confectionery manufacturing apparatus which concerns on this invention. It is a plan view explanatory view which shows one Embodiment of the confectionery manufacturing apparatus which concerns on this invention. It is a flowchart which shows one Embodiment of the confectionery manufacturing method which concerns on this invention.

Hereinafter, the confectionery manufacturing apparatus and the confectionery manufacturing method of the present invention will be described with reference to FIGS. 1 to 5, and will be used for understanding the present invention.

[Confectionery manufacturing equipment using steam unit A]
A confectionery manufacturing apparatus will be described with reference to FIGS. 3 and 4.
The confectionery manufacturing apparatus B using the steam unit A has an outside air intake unit B1 that takes in the outside air AR, an outside air temperature control rectifying unit B2 that heats and rectifies the taken in outside air AR, and an overheated and rectified outside air AR. A steam discharge that diffuses and discharges the mixed gas flowing from the duct B3 and the duct B3 into which the outside air AR and the steam S3 ejected from the steam unit A are mixed to generate a mixed gas. Section B4, the guide tubes Y1 and Y2 that guide the steam S generated in the boiler (not shown) to the steam unit A, the guide tube Y3 that guides the steam S to the outside air temperature control rectifying section B2, and the drain discharged from the steam unit A. It has drain pipes Z1 and Z2 for draining the steam, and Z3 for draining the drain discharged from the outside air temperature control rectifying unit B2.

First, as shown in FIG. 4, the steam S generated in the boiler is diverted into three induction pipes Y1, Y2 and Y3. The steam S flowing in the induction pipe Y1 flows into the trunk pipe 1, the steam S4 flowing in the induction pipe Y2 flows into the heating steam pipes 3a and 3b, and the steam S5 flowing in the induction pipe Y3. Flows into the heater B2a provided in the outside air temperature control rectifying section B2.

The steam S flowing into the trunk pipe 1 and the steam S4 flowing into the heating steam pipes 3a and 3b will be described later.

In the confectionery manufacturing apparatus B in this embodiment, the steam flow rate supplied from the boiler is 333 kg / h, of which the steam flow rate to the induction pipe Y1 is 169 kg / h and the steam flow rate to the guide pipe Y2 is 82 kg / h. The steam flow rate to the induction pipe Y3 is 82 kg / h. The temperature of the steam generated in the boiler is about 160 ° C., and the steam density is 3.2 kg / m ³ .

Further, a pressure reducing valve R1 is provided in the middle of the induction pipe Y1, and the temperature of the steam S passing through the pressure reducing valve R1 is lowered by the reduced pressure. When the measurement was performed by the pressure gauge P1 arranged on the downstream side of the pressure reducing valve R1, the temperature of the steam S was about 112 ° C., and the steam density was 0.87 kg / m ³ .

Further, the pressure reducing valves R2 and R3 are provided in the middle of the induction pipe Y3, and the steam S5 flowing in the induction pipe Y3 is decompressed and the temperature drops when it passes through the pressure reducing valve R2. When the measurement was performed by the pressure gauge P3 arranged on the downstream side of the pressure reducing valve R2, the temperature of the steam S5 was about 123 ° C., and the steam density was 1.2 kg / m ³ .

Then, when the steam S5 that has passed through the pressure reducing valve R2 passes through the pressure reducing valve R3, the pressure is reduced and the temperature drops. When the measurement was performed by the pressure gauge P4 arranged on the downstream side of the pressure reducing valve R3, the temperature of the steam S5 was about 111 ° C., and the steam density was 0.85 kg / m ³ .

As described above, the steam S flowing in the induction pipe Y1 and the steam S5 flowing in the induction pipe Y3 are depressurized by the pressure reducing valves R1 to R3 to lower the temperature. This is because the steam S is a steam for humidifying the confectionery body f by releasing it toward the confectionery body f described above, and it is not necessary to keep the temperature so high. Further, the steam S5 is steam used for heating the outside air AR as described above, but the outside air AR is so high because it is mixed with the steam S3 ejected from the steam unit A as described later. It is not necessary to keep it at the temperature.

On the other hand, the induction tube Y2 is not provided with a pressure reducing valve. This is a heating steam in which the steam S4 flowing in the induction pipe Y2 flows into the heating steam pipes 3a and 3b and is used for heating the steams S1 and S2, and the temperature of the steam is reduced by a pressure reducing valve. This is because there is no need to lower it.

Further, the outside air intake unit B1 takes in the outside air AR, which is the indoor air, into the manufacturing apparatus B from the outside air intake port B1a, and then filters the outside air AR with the filter B1b to clean it. Then, the purified outside air AR is sent to the outside air temperature control rectifying section B2 by the electric blower B1c provided in the outside air intake section B1.

Further, the outside air AR sent from the outside air intake unit B1 flows into the outside air temperature control rectifying section B2, the radiator B2a that heats the outside air AR, the filtration filter B2b that removes impurities such as fine particles from the outside air AR, and the outside air AR. The rectifying filter B2c of the above is provided.

Further, two heating steam pipes B2d are provided in the radiator B2a, and the steam S5 flowing in the induction pipe Y3 flows into the heating steam pipe B2d to heat the outside air AR.

Further, the outside air AR taken into the radiator B2a is heated to about 60 ° C. by the steam S5 flowing in the heating steam pipe B2d. Since the outside air AR is later mixed with the steam S3 ejected from the steam unit A to generate a mixed gas M, if the temperature of the outside air AR is low, the mixed steam S3 is cooled and liquefied. This is because it is necessary to heat the outside air AR to about 60 ° C., which is a temperature at which the steam S3 does not liquefy.

Further, the heated outside air AR is filtered by the filter B2b for impurities having a fine particle size, rectified by the rectifying filter B2c, and then flows into the duct B3. An inflow port B3a having a width of about 410 mm and a height of about 410 mm is formed at the upstream end of the duct B3. Then, the height gradually decreases and the width widens toward the downstream side, and the shape is curved near the end portion on the downstream side and the lower end side extends downward. The outlet B3b provided at the downstream end is formed to have a width of about 1410 mm and a height of 65 mm. The width of the outlet B3b is formed to be the same as the width of the oven F, which is an example of the baking portion for baking the confectionery body f, which is the object to be baked.

Further, when the outside air AR flowing in from the outside air temperature control rectifying unit B2 passes through the duct B3, it is mixed with the steam S3 ejected from the steam unit A to generate a mixed gas M.

Further, since the outside air AR is rectified by the rectifying filter B2c, the density and pressure of the steam are also uniform. Further, since the steam S3 is also suppressed from the turbulence of the steam by the steam unit A, the flow of the generated mixed gas M is not disturbed when the outside air AR and the steam S3 are mixed. Therefore, the mixed gas M is a gas that is homogeneous and rectified in terms of vapor density and temperature. The mixed gas M flowing in from the outlet B3b diffuses in the steam discharge section B4 and discharges steam in the entire width of the opening B4e of the steam discharge section B4.

Further, since the outside air AR is heated to about 60 ° C. by the radiator B2a, it is possible to prevent the steam S3 from liquefying due to the decrease in the steam temperature of the steam S3 when mixed.

Further, the mixed gas M generated in the duct D3 flows into the steam discharge unit B4. A straightening vane B4a for adjusting the flow of the mixed gas M is provided in the steam discharging portion B4, and a handle B4b for operating the straightening plate B4a is provided outside the steam discharging portion B4. The straightening vane B4a can adjust the tilt angle of the straightening vane B4a by operating the handle B4b. As a result, the mixed gas M flowing into the steam discharge unit B4 can be further rectified, and even if the flow of the mixed gas M is biased, the rectifying plate B4a can be adjusted to mix. The bias of the flow of the gas M can be corrected.

A steam discharger B4c that discharges the mixed gas M toward the confectionery body f before firing is provided at the downstream end of the steam discharge unit B4. The steam discharger B4c is gradually formed wider toward the downstream side. Specifically, the inflow port B4d provided on the upstream side has a width of about 1410 mm and a vertical width of 65 mm, but the steam discharge port B4e provided at the downstream end has a width of about 1410 mm and a vertical width of 260 mm.

When the mixed gas M flowing through the steam discharge unit B4 flows into the steam discharger B4c, it gradually diffuses to the size of the steam discharge port B4e. As a result, the mixed gas M can be evenly released to the confectionery body f before baking in a wide range, so that the mixed gas M is released toward the confectionery body f near the entrance of the oven F and is released toward the confectionery body f surface. Can be evenly humidified. Further, an atmosphere is created inside the baking chamber (not shown) of the oven F, and a suitable state of humidity on the surface of the confectionery f can be maintained until it moves to the baking region, and subsequent baking causes uneven baking. It can be suppressed from occurring. The flow rate of the mixed gas M discharged from the steam discharge port B4e is 38.7 m ³ / min.

The confectionery body f humidified by the mixed gas M is then carried into the oven F and then baked to produce a confectionery.

[About steam heating unit A]
Here, the steam unit A, which is an example of the steam heating unit, will be described.
As shown in FIG. 1, the steam unit A is an example of a branch pipe that is branched from the trunk pipe 1 and the trunk pipe 1 and is provided with eight branches at regular intervals along the length direction of the trunk pipe 1. It has a heating steam pipe 3a and 3b that are in contact with the pipe 2 and the branch pipe 2 and heat the branch pipe 2 from the outside. Then, as shown in FIG. 2, the curved pipe 23 of the branch pipe 2 and the steam pipes 3a and 3b for heating, which will be described later, are entirely covered with a cover 4 made of a metal plate such as an aluminum plate for heat retention. It is covered. The cover 4 is omitted in FIG.

As shown in FIG. 4, the steam S generated in the boiler (not shown) is diverted to the guide tubes Y1, Y2, and Y3. The guide pipe Y1 is provided so as to communicate with the trunk pipe 1 of the steam unit A, and the steam S flows through the guide pipe Y1 and flows into the trunk pipe 1. The induction pipe Y2 is provided so as to communicate with the heating steam pipes 3a and 3b, and the steam S4 flows through the induction pipe Y2 and flows into the heating steam pipes 3a and 3b. The guide pipe Y3 is provided so as to communicate with the heater B2a of the confectionery manufacturing apparatus B described later, and the steam S5 flows through the guide pipe Y3 and flows into the heater B2a.

Further, the steam discharge port Y1a provided at one end of the guide pipe Y1 and discharging the steam S flowing inside is provided so as to communicate with the inflow port 11 located on the upstream side of the trunk pipe 1 at a substantially right angle. The connecting portion between the steam discharge port Y1a and the inflow port 11 is an example of a distribution direction changing portion, and the distribution direction of the steam S is changed by this connecting portion. At this time, the flow direction of the steam S is changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized. The steam S passes through the inflow port 11 from the steam discharge port Y1a, flows into the trunk pipe 1, and flows through the trunk pipe 1. Then, as shown in FIG. 1, a part of the steam S flows into the branch pipe 2, and the rest is discharged to the outside air from the outlet 12 located on the downstream side of the trunk pipe 1.

Further, as shown in FIG. 1, the branch pipe 2 is provided so as to communicate with the trunk pipe 1, and one end side of the communication pipe 20 is provided so as to communicate with the trunk pipe 1 and the other end side of the communication pipe 20. , The horizontal pipes 21, 21 provided substantially orthogonal to the communication pipe 20, and the vertical pipes 22, 22, and the vertical pipes 22, 22 provided substantially orthogonal to the horizontal pipes 21, 21. It is composed of a curved pipe 23 having a curved portion 23e which is provided so as to communicate with each other and whose portion near the center is curved in a direction approaching the trunk pipe 1.

That is, the branch pipe 2 has a linear communication pipe 20, horizontal pipes 21, 21, vertical pipes 22, 22 and a curved pipe 23 having a curved portion 23e, and the central portion has a size capable of inserting the trunk pipe 1. It is open. Further, as shown in FIG. 2, eight such branch pipes 2 are arranged side by side at equal intervals along the trunk pipe 1 in the steam unit A, and the trunk pipe 1 is located at the center of the branch pipe 2. It is arranged so as to penetrate.

Further, on the upper side surface of the trunk pipe 1, steam diversion holes (not shown), which is an example of the distribution direction changing portion, are provided in substantially one line along the longitudinal direction of the trunk pipe 1 to the number of branch pipes 2. Correspondingly, eight are provided at predetermined intervals. One end port 20a, which is one end of the communication pipe 20 of the branch pipe 2 on the upstream side, is provided in communication with each steam diversion hole corresponding to the steam diversion hole. A part of the steam S flowing in the trunk pipe 1 flows into the branch pipe 2 from the steam diversion hole through the one end port 20a. At this time, the flow direction of the steam S is changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized.

Further, the steam S flowing into the communication pipe 20 moves in the communication pipe 20. The other end 20b on the downstream side of the communication pipe 20 is provided so as to communicate with the three-port (Mitsukuchi) joint 24, which is an example of the distribution direction changing portion. The three-mouth joint 24 has a substantially "T" -shaped shape, and is provided so as to communicate with the inflow pipe 24a into which the steam S moving in the communication pipe 20 flows in in a direction substantially orthogonal to the inflow pipe 24a. It consists of an outflow pipe 24b. Outlet ports 24c and 24d are provided at both ends of the outflow pipe 24b.

Further, the steam S flowing into the three-port joint 24 from the other end port 20b through the inflow pipe 24a hits the inner wall of the outflow pipe 24b and is diverted, and steams S1 and S2 flowing in the outflow pipe 24b in opposite directions are generated. At this time, the flow directions of the steams S1 and S2 are changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized. Then, the steams S1 and S2 flow in the outflow pipes 24b toward the outlets 24c and 24d, respectively, and flow into the horizontal pipes 21 and 21.

Further, the end portions 21a and 21a, which are the upstream end portions of the horizontal pipes 21 and 21, are provided so as to communicate with the outlets 24c and 24d of the three-mouth joint 24, and are provided on the downstream side ends of the horizontal pipes 21 and 21. The other end portions 21b and 21b, which are portions, are provided so as to communicate with the one end portions 25a and 25a which are the upstream end portions of the elbows 25 and 25 which are L-shaped joints, which is an example of the distribution direction changing portion. ing. At this time, the flow directions of the steams S1 and S2 are changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized.

The steams S1 and S2 flowing through the horizontal pipes 21 and 21 flow into the elbows 25 and 25 from the one end portions 25a and 25a, and flow out from the other end portions 25b and 25b which are the downstream end portions, and flow out from the other end portions 25b and 25b. It flows into 22. At this time, the flow directions of the steams S1 and S2 are changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized.

The steams S1 and S2 that have passed through the elbows 25 and 25 flow into the vertical pipes 22 and 22. The end portions 22a and 22a, which are the upstream end portions of the vertical pipes 22 and 22, are provided so as to communicate with the other end portions 25b and 25b of the elbows 25 and 25. The other end portions 22b, 22b of the vertical pipes 22, 22 which are the downstream end portions are the upstream end portions of the elbows 26, 26, which are examples of the distribution direction changing portions and are L-shaped joints. It is provided so as to communicate with the ends 26a and 26a. At this time, the flow directions of the steams S1 and S2 are changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized.

The steams S1 and S2 that have moved in the vertical pipes 22 and 22 flow into the elbows 26 and 26 through the ends 26a and 26a of the elbows 26 and 26, and the other ends 26b and 26b that are the downstream ends. It flows out from the curved pipe 23 and flows into the curved pipe 23 from the end portions 23a and 23b which are both ends of the curved pipe 23.

The curved tube 23 has a substantially “Ω” shape, and is composed of linear portions 23c and 23d extending linearly and curved portions 23e. A ejection hole 23f into which steam S3 is ejected is provided near the center of the curved portion 23e. Near the entrance of the curved portion 23e, two heating steam pipes 3a and 3b, which will be described later, are provided substantially parallel to the longitudinal direction of the trunk pipe 1, and steam S4 circulates inside.

The steams S1 and S2 that have flowed into the curved pipe 23 move in the straight portions 23c and 23d, flow into the curved portion 23e, merge at 23 g near the top of the curved portion 23e, and become steam S3. It erupts from 23f. At this time, the flow directions of the steams S1 and S2 and the steam S3 are changed by about 90 degrees to be agitated, and the temperature, steam density, and pressure are equalized.

Here, the heating steam pipes 3a and 3b are provided at a distance of about 10 mm, and a slit SL is formed. The steam S3 ejected from the ejection hole 23f passes through the slit SL and is ejected to the outside.

[Explanation of steam flow]
In the steam unit A having such a structure, the distribution directions of the steams S, S1 and S2 are changed in order to rectify the flow of the steams S, S1 and S2 as follows.

First, the steam S generated in the boiler is guided by the induction pipe Y1 and reaches the inflow port 11 of the trunk pipe 1 of the steam unit A, and then the distribution direction is changed in a substantially right angle direction (first distribution direction change). Location C1), it flows into the trunk pipe 1.

After that, the steam S flows into the branch pipe 2 from the steam diversion hole, but at that time, the flow direction is changed to the upward direction, which is about a right angle direction (second flow direction change point C2). After flowing into the branch pipe 2, the steam S is divided into the steams S1 and S2 in the three-port joint 24 and flows into the horizontal pipes 21 and 21, but at that time, the flow direction is set to the length of the outflow pipe 24b. The direction is changed to the horizontal direction which is substantially perpendicular to the communication pipe 20 (third distribution direction change point C3).

Further, when the steams S1 and S2 move in the horizontal pipes 21 and 21 and flow into the elbows 25 and 25, the distribution direction is the length direction of the vertical pipes 22 and 22 and the horizontal pipes 21 and 21. It is changed downward, which is substantially perpendicular to the direction (fourth distribution direction change point C4).

Further, when the steams S1 and S2 move in the vertical pipes 22 and 22 and flow into the elbows 26 and 26, the flow direction is the length direction of the curved pipe 23 and the vertical pipes 22 and 22. It is changed to the horizontal direction which is a substantially right angle direction (fifth distribution direction change point C5). The distribution direction at this time is opposite to the distribution direction when moving in the horizontal pipes 21 and 21 described above.

Further, the steams S1 and S2 flow into the curved pipe 23 from the ends 23a and 23b of the curved pipe 23, respectively. Here, the straight portions 23c and 23d and the curved portions 23e are communicated and connected at right angles to form the corner portions 23h and 23i. Therefore, when the steam S1 and S2 flow in from the end portions 23a and 23b, pass through the straight portions 23c and 23d and flow into the curved portion 23e, the corner portions 23h and 23i refer to the straight portions 23c and 23d. The distribution direction is changed upward, which is a substantially right-angled direction (sixth distribution direction change point C6).

Further, the steams S1 and S2 merge at 23 g near the apex of the curved portion 23e to form steam S3, which is ejected from the ejection hole 23f. At this time, since the ejection hole 23f of the steam S3 is open downward, the flow direction of the steam S3 is changed downward (seventh flow direction change point C7).

In this way, the steam S generated in the boiler flows through the steam unit A and is ejected from the ejection hole 23f by changing the circulation direction seven times, so that the steam S is agitated and the density and pressure become uneven. Since it is relaxed, the flow of steam is gradually adjusted, and the steam S3 ejected from the ejection hole 23f is rectified steam.

Further, the steam S flowing into the trunk pipe 1 flows out as steam S6 from the outlet 12, passes through the drain pipes Z1 and Z2, and is drained by the drain traps D1 and D2, and then only the steam S6 is the confectionery manufacturing apparatus B. It is discharged to the outside. Then, the steam S4 flowing into the heating steam pipes 3a and 3b passes through the water distribution pipe Z1 as steam S7, is drained by the drain trap D1, and then is discharged to the outside of the confectionery manufacturing apparatus B together with the steam S6.

Further, as will be described later, in the outside air heating step STd, the steam S5 flowing through the guide pipe Y3 and flowing into the heater B2a heats the outside air AR, passes through the water distribution pipe Z3, and is drained by the drain trap D3. After that, it is discharged as steam S8 together with steam S6 and steam S7 to the outside of the confectionery manufacturing apparatus B.

[About steam heating method]
In the steam unit A, the steam S generated from the boiler is a pressure gauge P1 provided on the downstream side of the pressure reducing valve R1 because the vapor pressure is lowered by the pressure reducing valve R1 provided in the middle of the induction pipe Y1. As a result of measurement, the temperature of steam S is about 112 ° C. The steam S flows into the trunk pipe 1 of the steam unit A while maintaining this temperature.

The steam S flowing into the trunk pipe 1 then becomes steams S1 and S2 and circulates in the branch pipe 2. In the process of circulation, the steam S is heated by three heating structures H1 to H3 as described below. Will be done.

[First heating structure H1]
In the first heating structure H1, which is an example of the first heating unit, the heating steam pipes 3a and 3b through which the steam S4, which is the heating steam, flows in the corner portions 23h and 23i of the curved tube 23 Since the corner portions 23h and 23i are provided close to each other, the heating steam pipes 3a and 3b are heated by the steam S4, and the heated steam pipes 3a and 3b are close to the corner portions 23h. , 23i is heated, and the steams S1 and S2 circulating in the corners 23h and 23i are heated.

The temperature of the steam S4 was 159 ° C. as measured by a pressure gauge P2 provided on the downstream side of the induction pipe Y2. Since the temperature of the steam S4 is higher than the temperature of the steam S (about 112 ° C.), the steams S1 and S2 are heated by the steam S4, so that the temperature drop due to the piping resistance can be prevented.

[Second heating structure H2]
In the second heating structure H2, which is an example of the second heating portion, the steams S1 and S2 heated by the first heating structure H1 flow through 23 g near the top of the curved portion 23e close to the trunk pipe 1. At that time, 23 g near the top is heated by the heat released from the steams S1 and S2. As a result, the trunk pipe 1 close to 23 g near the top is heated, and the steam S flowing in the trunk pipe 1 is heated.

[Third heating structure H3]
In the third heating structure H3, which is an example of the third heating unit, the steam S1 and S2 heated in the first heating structure H1 eject the steam S3 from the ejection hole 23f to the outside of the branch pipe 2. The temperature drops due to the fact that it is released and heat exchange with the outside air, which has a lower temperature than steam. The steam whose temperature has dropped is heated by heat exchange by contacting with the heating steam pipes 3a and 3b.

As described above, since the steam unit A has the first to third heating structures H1 to H3, the temperature drops due to pressure loss such as pipe resistance in the process of the steam S flowing through the trunk pipe 1 and the branch pipe 2. The steam S can be heated, and the structure is such that the temperature drop of the steam is suppressed. Actually, when the temperature of the steam S was measured by using a thermometer T1 in the vicinity of the outlet 12 while moving in the trunk pipe 1, it was about 100 ° C., and no significant temperature drop was confirmed.

[Confectionery manufacturing method using heated steam]
A confectionery manufacturing method based on this embodiment will be described with reference to FIG.
The confectionery manufacturing method based on this embodiment comprises the following steps.

(ST1 1st step)
The first step ST1 is an example of the first steam flow process, and is a trunk pipe inflow step in which the steam S generated in the boiler flows into the trunk pipe 1.
(ST2 2nd step)
The second step ST2 is an example of the second steam flow process, and is arranged so as to branch the steam S flowing in the trunk pipe 1 from the trunk pipe and surround the trunk pipe in the trunk pipe inflow step ST1. This is a branch pipe inflow step of flowing into the branch pipe 2.
(ST3 3rd step)
The third step ST3 is a steam flow direction changing step for changing the flow direction of the steam S flowing in the branch pipe in the branch pipe inflow step ST2.
(ST4 4th step)
In the fourth step ST4, the corners 23h and 23i of the curved pipe 23 through which the steams S1 and S2 are changed in the flow direction in the steam flow direction change step ST3 are brought into contact with or close to the heating steam pipes 3a and 3b. This is the first heating step of heating.
(ST5 5th step)
In the fifth step ST5, the branch pipe 2 through which the steams S1 and S2 heated in the first heating step flow are brought into contact with or close to the trunk pipe 1 to heat the steam S flowing in the trunk pipe 1. This is the second heating step.
(ST6 6th step)
In the sixth step ST6, the steams S1 and S2 heated in the first heating step ST4 are ejected as steam S3 from the ejection hole 23f and brought into contact with the heating steam pipes 3a and 3b for heating. This is the third heating step.
(ST7 7th step)
The seventh step ST7 is a steam ejection step of ejecting the steam S3 heated in the third heating step ST6 to the outside of the steam unit A.

(STa 1st step)
The first step STa is an outside air taking-in step of taking in the outside air AR into the manufacturing apparatus B.
(STb 2nd step)
The second step STb is a first outside air filtration step of filtering the outside air AR taken in by the outside air uptake step STa.
(STc 3rd step)
The third step STc is an outside air blowing step in which the outside air AR filtered by the filtration step STb is sent to the outside air temperature control rectifying unit B2 by the electric blower B1b.

(STd 4th step)
The fourth step STd is an outside air heating step of heating the outside air AR flowing into the outside air temperature control rectifying unit B2 in the outside air blowing step STc, which is an example of the heating step, by using the steam S5 flowing in the steam pipe B2d for heating. be.
(STe 5th step)
The fifth step STe is a second outside air filtration step for filtering the outside air AR heated in the outside air heating step STd, which is an example of the filtration rectification step.
(STf 6th step)
The sixth step STf is a rectification step for rectifying the outside air AR filtered in the second outside air filtration step STe.

(STg 7th step)
The seventh step STg is a mixing step of mixing the outside air AR rectified in the rectification step STf with the steam S3 ejected to the outside of the steam unit A in the steam ejection step ST7 to generate a mixed gas M.
(STh 8th step)
The eighth step STh is a rectification / distribution direction adjustment step in which the mixed gas M generated in the mixing step STg is rectified by the rectifying plate B4a in the steam discharge unit B4 and the flow direction is adjusted.
(STi 9th step)
The ninth step STi is a discharge step of discharging the mixed gas M rectified by the rectification step rectification step STh and whose flow direction is controlled toward the confectionery body f.

(STj 10th step)
The tenth step STj is a baking step of baking the confectionery body f humidified by the mixed gas M in the release step STi.

By the above step, the steam whose temperature has dropped due to the pipe resistance in the process of the steam S, S1 and S2 flowing in the steam unit A flowing in the trunk pipe 1 and the branch pipe 2 can be heated by a simple facility. .. Further, by rectifying the steam and making the steam density and the vapor pressure uniform, it is possible to suppress the uneven humidification, and it is possible to produce a confectionery having no uneven heating.

As described above, the steam heating unit, the steam heating method, the confectionery manufacturing apparatus and the confectionery manufacturing method to which the present invention is applied suppress the temperature drop of the steam with a simple structure, and rectify the steam to heat the confectionery due to uneven humidification. Unevenness can be suppressed.

1 Trunk pipe 2 Branch pipe (branch pipe)
24 Three-way joint (distribution direction change part)
25, 25 Elbow (Distribution direction change department)
26, 26 Elbow (Distribution direction change department)
23f Ejection hole 3a, 3b Steam pipe for heating A Steam unit (steam heating unit)
B1a Outside air intake port B2 Outside air temperature control rectifying unit B (outside air heating rectifying unit)
B2a radiator (warming part)
B2c rectifying filter (rectifying section)
B4 steam release unit (mixed gas release unit)
B4a rectifying plate (rectifying section, wind direction adjusting section)
F Fired part f Confectionery body (baked object)
R1, R2, R3 pressure reducing valve (steam pressure adjusting means) H1
H1 1st heating structure (1st heating part)
H2 2nd heating structure (2nd heating part)
H3 3rd heating structure (3rd heating part)
M mixed gas (mixed gas)
S, S1, S2, S3, S4, S5 Steam ST1 Trunk pipe inflow process (first steam flow process)
ST2 branch pipe inflow process (second steam flow process)
ST3 Steam flow direction change process ST4 1st heating process ST5 2nd heating process ST6 ejection process ST7 3rd heating process STa outside air intake process STd outside air heating process (heating process)
STe 2nd outside air filtration process (filtration rectification process)
STf rectification process (filtration rectification process)
STg mixing process STi release process STj firing process

Claims (8)

The trunk pipe through which steam flows and
A distribution direction changing section that branches from the trunk pipe into a plurality of branches and is arranged so as to surround the trunk pipe and changes the distribution direction of the steam, and the steam whose distribution direction is changed at the distribution direction changing section are ejected. A first heating section that has an ejection hole and heats the steam flowing inside by an external heat source, and the steam heated by the first heating section adds the steam in the trunk pipe. A branch pipe having a second heating part to be heated,
A steam heating unit including a heating body that is heated by the first heating unit and is in contact with the steam ejected from the ejection hole to heat the steam. The steam heating unit according to claim 1, wherein the heat source is the heating body, and the heating body is heated by using steam. The first steam distribution process that distributes steam to the trunk pipe,
In the first steam distribution step, a second steam distribution step in which the steam flowing in the trunk pipe is branched from the trunk pipe and distributed in a branch pipe arranged so as to surround the trunk pipe.
A steam flow direction changing step of changing the flow direction of the steam branched from the trunk pipe and flowing in the branch pipe in the second steam flow step.
In the steam flow direction changing step, the steam that has been changed in the flow direction and flows in the branch pipe is brought into contact with or close to the branch pipe and the heating steam pipe in which the heating steam flows inside. The first heating process to heat and
A second heating step of heating the steam flowing in the trunk pipe by bringing the branch pipe through which the steam heated in the first heating step flows into contact with or close to the trunk pipe.
A steam including a third heating step in which the steam heated in the first heating step and flowing through the branch pipe is ejected from an ejection hole to come into contact with the heating steam pipe to heat the steam. Heating method. A trunk pipe through which steam flows, a distribution direction changing section that branches from the trunk pipe into a plurality of branches and surrounds the trunk pipe to change the flow direction of the steam, and a distribution direction changing section that changes the distribution direction. It has a ejection hole from which the modified steam is ejected, and at the first heating section where the steam flowing inside is heated by an external heat source, and the steam heated by the first heating section. The steam is heated in contact with the branch pipe having the second heating portion for heating the steam in the trunk pipe and the steam that is heated by the first heating portion and ejected from the ejection hole. With a steam heating unit having a heating body,
An outside air heating rectification unit having an outside air intake port for taking in outside air, a heating unit for heating the outside air, and a first rectifying unit for rectifying the outside air passing through the heating unit.
A mixed gas discharge unit that discharges a mixed gas generated by mixing the heated rectified outside air heated and rectified by the outside air heating rectifying unit and the steam that has passed through the steam heating unit, and
A confectionery manufacturing apparatus including a baking unit for baking a product to be baked humidified with the mixed gas at a predetermined temperature. The confectionery manufacturing apparatus according to claim 4, further comprising a steam pressure adjusting means capable of adjusting the pressure of steam flowing into the trunk pipe, the branch pipe, and the heating unit. The confectionery manufacturing apparatus according to claim 4 or 5, wherein the mixed gas discharge unit has a second rectifying unit for rectifying the mixed gas passing through the inside thereof. The confectionery manufacturing apparatus according to claim 4, claim 5 or claim 6, wherein the mixed gas discharge unit has a wind direction adjusting unit capable of adjusting the wind direction of the mixed gas. In the first steam flow process for circulating steam to the trunk pipe, and in the first steam flow step, the steam flowing through the trunk pipe is branched from the trunk pipe and arranged so as to surround the trunk pipe. A second steam flow process for circulating in a branch pipe, a steam flow direction changing step for changing the flow direction of the steam branched from the trunk pipe and flowing in the branch pipe in the second steam flow step, and the steam flow. In the direction changing step, the steam that is changed in the flow direction and flows in the branch pipe is heated by contacting or bringing the branch pipe and the heating steam pipe in which the heating steam flows inside into contact with or close to each other. First heating step, a second heating step in which the branch pipe through which the steam heated in the first heating step flows is brought into contact with or close to the trunk pipe to heat the steam flowing in the trunk pipe. The third heating step, in which the steam heated in the first heating step and flowing through the branch pipe is ejected from the ejection hole and brought into contact with the heating steam pipe to be heated. Steam heating flow with process and
An outside air heating rectification flow having an outside air intake step, a heating step for heating the outside air, and a filtration rectification step for filtering and rectifying the outside air that has passed through the heating step.
A mixing step of mixing the heated and rectified outside air heated and rectified by the outside air heating and rectifying flow with the steam heated by the steam heating flow to generate a mixed gas to be discharged toward the object to be fired. A release flow having a release step of discharging the mixed gas generated in the mixing step toward the object to be fired.
A method for producing a confectionery, which comprises a baking flow for baking a product to be baked humidified with the mixed gas at a predetermined temperature.

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