JP5032524B2 - Commercial rice cooker - Google Patents

Description

  The present invention relates to a commercial rice cooker, and more particularly to a commercial rice cooker used in a rice cooking facility that uses a large number of rice cookers to cook a large amount of rice for each rice cooker.

  2. Description of the Related Art Conventionally, in a rice cooking facility that continuously cooks a large amount of rice, various types of rice cookers for business that cook rice for each rice cooker have been proposed. For example, Patent Document 1 discloses a rice cooker using a surface combustion burner as a heating means, and exhaust gas generated by combustion is exhaust gas suction formed between the lower surface of the rice bran and the upper surface of the side wall of the rice cooker. There is disclosed a rice cooker that is led from a slit to a gap outside the side wall of the rice cooker and forcedly exhausted to the outside by an exhaust blower.

  However, in this conventional rice cooker, the combustion exhaust gas is forcibly exhausted to the outside by the exhaust blower from a specific portion of the outer peripheral portion of the rice cooker, so that the portion close to the suction blower is not so. There is a disadvantage that the exhaust speed of the combustion exhaust gas is different between the portions, the ambient temperature of the rice cooker is different, and uneven rice cooking occurs. In addition, since the combustion exhaust gas exhausted from the exhaust blower has a high temperature, it cannot be exhausted into the room as it is, and a facility such as a duct must be provided and exhausted to the outside, resulting in a large facility. is there.

  Moreover, in patent document 2, the combustion gas channel | path which connects the internal space and external space of a rice cooker was provided in the side wall of the rice cooker, and the combustion exhaust gas was discharged | emitted from the circumference | surroundings of a rice cooker to the exterior equally. A machine is disclosed. According to this rice cooker, the combustion exhaust gas is discharged evenly from the periphery of the rice cooker, so there is no local difference in the ambient temperature of the rice cooker, and there is an advantage that uniform rice cooking is possible. It is done. However, also in this rice cooker, the combustion exhaust gas is exhausted from the periphery of the rice cooker to the outside at the same temperature, so the temperature inside the room containing the rice cooker becomes high, the working environment deteriorates, and the rice cooking When the transport carriage travels in the upper part of the machine, there is a problem that high temperature combustion exhaust gas may adversely affect various devices and sensors in the transport carriage.

JP 2000-41277 A JP 2005-185438 A

  The present invention was made in order to solve the problems of the conventional rice cookers for business use as described above. There is no uneven rice cooking, and the room temperature does not rise even if the combustion exhaust gas is exhausted indoors. An object of the present invention is to provide a commercial rice cooker that does not adversely affect the devices located at the top of the rice cooker.

  As a result of intensive studies to solve the above problems, the inventors of the present invention reduce the temperature of combustion exhaust gas by mixing combustion exhaust gas and external air when exhausting the combustion exhaust gas from the rice cooker to the outside. It has been found that the room temperature is not so high and the equipment is not adversely affected.

  That is, the present invention has the above-described problem, an internal space having an open upper portion for receiving at least the bottom of the rice cooker, a first side wall that surrounds the side of the internal space, and a heating device provided at the bottom of the internal space. And the upper surface of the first side wall receives the rice cooker in contact with the bottom surface of the rice cooker when the rice cooker is set, and the lower surface of the rice cooker A plurality of hook supports that form an exhaust passage for combustion exhaust gas are provided between the upper surface of the first side wall of the rice cooker, and the first side wall is disposed between the outer peripheral surface of the first side wall and the first side wall. A second side wall that forms a cooling air passage is provided, the first cooling air passage has an air inflow port that communicates with the outside at the lower end portion, and air that opens near the outlet of the exhaust passage of the combustion exhaust gas at the upper end portion Solve by providing commercial rice cooker with outlet Than is.

  In the rice cooker of the present invention, since the air outlet of the first cooling air passage is open near the outlet of the exhaust passage of the combustion exhaust gas, it is generated when the combustion exhaust gas is exhausted vigorously from the outlet of the exhaust passage. Due to the negative pressure, the air in the first cooling air passage is sucked and flows out from the air outlet, and is mixed with the combustion exhaust gas. By mixing with air in this way, the temperature of the combustion exhaust gas is effectively lowered, and even if it is discharged into the room as it is, the room temperature is not increased so much. Moreover, there is no possibility of adversely affecting various devices, sensors, and the like located at the top of the rice cooker.

  In a preferred embodiment of the present invention, the second side wall has a bent portion that bends toward the inside of the rice cooker, and the air outlet of the first cooling air passage has a lower surface of the bent portion and an upper surface of the first side wall. It is desirable to be formed between. By providing such a bent portion, even if the first side wall of the rice cooker has a certain thickness, the upper end portion of the first cooling air passage is bent along the upper surface of the first side wall, and the first cooling is performed. The air outlet of the air passage can be opened near the outlet of the exhaust passage of the combustion exhaust gas.

  In addition, a third side wall that forms a second cooling air passage between the outer peripheral surface of the second side wall is provided outside the second side wall, and the second cooling air passage communicates with the outside at the lower end portion. It is desirable to have an air inlet and an air outlet that communicates with the outside at the upper end. Thus, even if high temperature combustion exhaust gas is generated in the internal space of the rice cooker by providing the third side wall that forms the second cooling air passage, the external side wall of the rice cooker is relatively low in temperature. Thus, even if an operator touches the rice cooker, there is an advantage that there is no risk of burns or the like.

  In some cases, air can be forced to flow through the first cooling air passage formed between the outer peripheral surface of the first side wall and the inner peripheral surface of the second side wall. In order to forcibly supply the air to the air inlet of the first cooling air passage, for example, a part of the air flowing through the air pipe that supplies the combustion air to the heating device of the rice cooker is changed to the first cooling air passage. To the air inlet. By forcibly supplying air to the air inlet of the first cooling air passage, for example, the flow rate and temperature of the supplied air can be controlled to control the temperature of the combustion exhaust gas.

  The heating device provided at the bottom of the interior space of the rice cooker may be anything as long as it can cook rice and generate combustion exhaust gas, but from the point of thermal power obtained, Bunsen burner However, a surface combustion burner is desirable from the viewpoint of combustion efficiency.

  According to the rice cooker of the present invention, high-temperature combustion exhaust gas can be mixed with air and discharged to the outside as a low-temperature mixed gas, so that the temperature of the room where the rice cooker is installed can be raised so much. Therefore, there is an advantage that the deterioration of the working environment can be avoided. In addition, there is an advantage that there is no possibility of being adversely affected by the temperature of the combustion exhaust gas discharged from the rice cooker even if equipment or sensors equipped with various devices such as a transport cart are present at the top of the rice cooker. Furthermore, the combustion exhaust gas is mixed with air, becomes a low-temperature mixed gas, and is discharged to the outside uniformly over 360 degrees around the rice cooker, so the side of the rice cooker set in the rice cooker There is no temperature difference depending on the place over 360 degrees around, and there is an advantage that cooking can be performed without unevenness.

It is a top view of an example of the rice cooker of this invention. It is X-X 'sectional drawing of FIG. It is XY sectional drawing of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is the elements on larger scale of FIG. It is the elements on larger scale which show another example of the rice cooker of this invention. It is a conceptual diagram which shows another example of the rice cooker of this invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the illustrated one.

  FIG. 1 is a plan view showing an example of a commercial rice cooker according to the present invention. In FIG. 1, 1 is the rice cooker of this invention, 2 is the 1st side wall of the rice cooker 1, 3 is the 2nd side wall, 4 is the 3rd side wall. 5 is a first cooling air passage formed between the outer periphery of the first side wall 2 and the inner periphery of the second side wall 3, and 6 is formed between the outer periphery of the second side wall 3 and the inner periphery of the third side wall 4. A second cooling air passage. 7, 7, 7... Are hook supports, and are equally installed on the upper surface 2 a of the first side wall 2 at equal intervals.

  As will be described later, the space formed between the upper surface 2a of the first side wall 2 and the lower surface of the bowl portion of the rice cooker, which is partitioned by the pot supports 7, 7, 7... The hook supports 7, 7, 7... Need to be evenly arranged on the upper surface 2 a of the first side wall 2. Thereby, the discharge of combustion exhaust gas to the outside is also uniform over the outer periphery 360 degrees of the rice cooker 1, and no temperature difference is generated at the side portion of the rice cooker, thereby making it possible to cook rice without unevenness. In this example, the number of hook supports 7, 7, 7... Is eight, but it is necessary to support the rice cooker, and it is sufficient that the number is three or more. Of course, it is not limited to an individual.

  8 is a heating device, and 9 is a temperature sensor. The heating device 8 used in the rice cooker 1 according to the present invention may be anything as long as it can cook rice and generates combustion exhaust gas. From the viewpoint of combustion efficiency, a surface combustion burner is preferable.

  2 is a cross-sectional view taken along the line X-X ′ of FIG. 1. For convenience, only the first side wall 2 and the hook supports 7, 7 are hatched. S is an internal space of the rice cooker 1, and the internal space S receives at least the bottom of the rice cooker from the upper opening when the upper portion is opened and a rice cooker (not shown) is set at the rice cooking position.

  The upper end part of the 2nd side wall 3 is bent toward the inner side of the rice cooker 1, and forms the bending part 3a. The first cooling air passage 5 formed between the outer peripheral surface of the first side wall 2 and the inner peripheral surface of the second side wall 3 is formed between the lower surface of the bent portion 3 a and the upper surface 2 a of the first side wall 2. And open to the outside through the space, and the open end forms an air outlet. The lower end portion of the first cooling air passage 5 is open to the outside, and the open end forms an air inlet 5in that communicates with the outside. The upper end portion of the second cooling air passage 6 is opened to the outside as it is to form an air outlet 6out, and the lower end portion is also opened to the outside as it is to form an air outlet 6in. In addition, 10 is a pipe line for supplying fuel gas or a mixed gas of fuel gas and air to the heating device 8, and 11 is a signal line for transmitting a signal from the temperature sensor 9 to the outside.

  FIG. 3 is a cross-sectional view taken along the line X-Y in FIG. 1, and also shows the rice cooker P in a state set at the rice cooking position. As shown in the figure, the pot supports 7, 7, 7... Receive the lower surface of the bowl portion Pt of the rice cooker P on the upper surface, and the rice cooker P is at least at the bottom in the interior space S of the rice cooker 1. The rice cooking position located at is supported. In a place where the pot support 7, 7, 7... Does not exist on the upper surface 2a of the first side wall 2, the upper surface 2a of the first side wall 2 and the bowl portion Pt of the rice cooking pot P as shown in the right half of FIG. A space defined by the adjacent hook supports 7, 7, that is, an exhaust passage 12 for combustion exhaust gas, is formed between the lower surface of the exhaust gas. As shown in the figure, the exhaust passage 12 is opened on the upper surface 2 a of the first side wall 2, and the opening serves as an outlet of the exhaust passage 12.

  The bent portion 3 a of the second side wall 3 has a bent tip portion extending to the upper surface 2 a of the first side wall 2, and the first cooling air passage 5 is formed between the lower surface of the bent portion 3 a and the first side wall 2. An air outlet 5out that includes a space formed between the upper surface 2a and opens on the upper surface 2a of the first side wall 2 through this space, and this opening is located at the upper end of the first cooling air passage 5. It has become.

  As shown in FIG. 3, the air outlet 5out and the outlet of the exhaust passage 12 for combustion exhaust gas are both on the upper surface 2a of the first side wall 2 and are in a position facing and close to each other. Thus, since the air outlet 5out of the first cooling air passage 5 is opened in the vicinity of the outlet of the exhaust passage 12 for the combustion exhaust gas, when the combustion exhaust gas is exhausted from the exhaust passage 12, it is accompanied by the discharge. Due to the generated negative pressure, the air in the first cooling air passage 5 is sucked, flows out from the air outlet 5out, and is mixed with the combustion exhaust gas.

  FIG. 4 is an enlarged view of a part of FIG. The high-temperature combustion exhaust gas generated by the combustion of the heating device 8 passes between the side surface of the rice cooker P and the inner peripheral surface of the first side wall 2 as shown by the solid line in the figure, and the flange portion Pt and the first side wall 2. It passes through the exhaust passage 12 formed between the upper surface 2a and the exhaust passage 12 and is discharged from the outlet of the exhaust passage 12 to the outside. On the other hand, the air outlet 5a of the first cooling air passage 5 opens near the outlet of the exhaust passage 12, so that the air in the first cooling air passage 5 is accompanied by the discharge of combustion exhaust gas from the exhaust passage 12. As shown by the broken line in the figure, the air is sucked out by the negative pressure generated in this way and flows out from the air outlet 5out. The outflowed air mixes with the high-temperature combustion exhaust gas there, lowers the temperature of the combustion exhaust gas, and both of them become a mixed gas with a lowered temperature and are discharged upward.

  As described above, when the high-temperature combustion exhaust gas generated by the combustion of the heating device 8 is discharged from the exhaust passage 12, it immediately mixes with the relatively low-temperature air flowing out from the air outlet 5out, and the temperature is reduced. Since it becomes gas, even if it is discharged as it is into the room where the rice cooker 1 is installed, the temperature in the room will not rise so much. Moreover, even if it is a layout which a conveyance trolley etc. drive | works above the rice cooker 1, there is no possibility that the various apparatuses, sensors, etc. which are mounted in the conveyance trolley will receive the bad influence by a temperature rise. Therefore, the rice cooker 1 of the present invention does not require equipment such as an exhaust duct. Moreover, the 2nd side wall 3 is provided, the space between the 1st side wall 2 and the 2nd side wall 3 is opened outside as the 1st cooling air channel | path 5, the lower end part is made into the air inflow port 5in, and the upper end part Is a simple structure in which the air outlet 5out is opened in the vicinity of the outlet of the exhaust passage 12, and the high-temperature combustion exhaust gas and the low-temperature air can be mixed to form a mixed gas with a reduced temperature. There is an advantage that it is not necessary to install additional equipment.

  With the outflow of air from the air outlet 5out, new air naturally flows into the first cooling air passage 5 from the air inlet 5in at the lower end of the first cooling air passage 5, In principle, means for forcibly supplying air to the air inlet 5 in of the first cooling air passage 5 is unnecessary. However, air supply means such as a fan may be installed in the first cooling air passage 5 or in the vicinity of the air inflow port 5in in order to ensure the outflow of air from the air outflow port 5out.

  Along with the combustion of the heating device 8 and the discharge of the mixed gas of combustion exhaust gas and air described above, ascending airflow is generated in the second cooling air passage 6 as shown by the broken line in the figure, The air flowing in from the air inlet 6in flows out upward from the air outlet 6out. Thus, the temperature of the third side wall 4 during combustion of the heating device 8 due to the heat distribution effect of the air in the second cooling air passage 6 and the air itself existing in the second cooling air passage 6. It doesn't rise so much. Therefore, even if an operator accidentally touches the third side wall 4 of the rice cooker 1, there is no risk of burns.

  FIG. 5 is a partially enlarged view in which a part of FIG. 4 is enlarged. The air outlet 5out of the first cooling air passage 5 only needs to be in the vicinity of the outlet of the exhaust passage 12, and the distance W between them can quickly discharge the combustion exhaust gas to the outside, and the first cooling air passage 5 can be set as appropriate as long as the air in the air can flow out from the air outlet 5out. However, if the distance W is too small, it becomes difficult to quickly discharge the combustion exhaust gas from the gap to the outside. Therefore, it is usually desirable that the distance W is equal to or greater than the height Dg of the exhaust passage 12. On the other hand, if the distance W is too large, the negative pressure generated in the vicinity of the air outlet 5out is reduced as the combustion exhaust gas is discharged, and the amount of air flowing out from the air outlet 5out is reduced. The height Dg is 3 times or less, preferably 2 times or less. In this example, since the bent portion 3a is provided on the second side wall 3, the distance W can be appropriately adjusted by adjusting the length of the bent portion 3a. Even if the air is forcibly supplied to the air inlet 5in of the first cooling air passage 5, if the distance W is too large, the combustion exhaust gas discharged from the exhaust passage 12 and the air outlet 5out Therefore, the distance W is preferably not more than 3 times, preferably not more than 2 times the height Dg of the exhaust passage 12, as in the above case.

  The height of the first cooling air passage 5 formed between the lower surface of the bent portion 3a of the second side wall 3 and the upper surface 2a of the first side wall 2, that is, the height Da of the air outlet 5out can be adjusted as appropriate. It is. However, if Da is too small, the amount of air flowing out from the air outlet 5out is insufficient to reduce the temperature of the high-temperature combustion exhaust gas. Conversely, if Da is too large, the air is discharged along with the exhaust of the combustion exhaust gas. Since the negative pressure generated in the vicinity of the outflow port 5out is reduced and the amount of air flowing out from the air outflow port 5out is decreased, Da is preferably (1/2) Dg or more and 2Dg or less. Most preferably, they are almost the same. As will be described later, when air is forcibly supplied to the air inlet 5in of the first cooling air passage 5, the above consideration is not necessary.

  FIG. 6 is an enlarged view showing another example of the rice cooker of the present invention. As shown in the figure, in this example, the exhaust passage 12 formed between the upper surface 2a of the first side wall 2 and the lower surface of the bowl portion Pt of the rice cooker P is the outer end of the upper surface 2a of the first side wall 2. It extends to the part. Further, the second side wall 3 does not have the bent portion 3a at the upper end, and the air outlet 5out of the first cooling air passage 5 is located in the vicinity of the outlet of the exhaust passage 12 from the direction orthogonal to the exhaust passage 12. It is open. When the high-temperature combustion exhaust gas is discharged from the exhaust passage 12, a negative pressure is generated in the vicinity of the air outlet 5out, and the relatively cool air in the first cooling air passage 5 is sucked and the air outlet 5out. It flows out of the water and immediately mixes with the high-temperature combustion exhaust gas, and both of them become a mixed gas with a lowered temperature and are discharged to the outside.

FIG. 7 is a conceptual diagram showing another example of the rice cooker of the present invention. 7, 13 is the air supply source such as a blower, via an on-off valve 14 _1, the flow regulating valve 15 ₁ is connected to a mixer 16, the outlet of the mixer 16 via line tied with heating device 8 10 is connected. A fuel gas source 17 is connected to the mixer 16. In this example, the fuel gas from the fuel gas source 17 and the air from the air source 13 are mixed by the mixer 16 and supplied to the heating device 8 as a mixed gas.

18 is a branch pipe connected to the conduit between the air source 13 and the mixer 16, the on-off valve 14 2 _via the flow regulating valve 15 _2, an air inlet at the lower end portion of the first cooling air passage 5 It is connected to 5in. Thus, when the opening and closing valve 14 ₂ is opened, the air flow rate regulating valve 15 ₂ is adjusted flow rate, will be forcibly supplied to the air inlet 5in the first cooling air passage 5. In addition, as a position where the front-end | tip of the branch pipe 18 is connected to the air inflow port 5in, although it has shown only two places in the figure, it is connected to several places equally over the outer periphery 360 degree | times of the rice cooker 1, Thus, air is uniformly supplied from the air inlet 5 in to the entire first cooling air passage 5 surrounding the outer periphery of the first side wall 2. Therefore, combined with the fact that the pot supports 7, 7, 7... Are evenly arranged, the combustion exhaust gas is discharged uniformly over 360 degrees around the rice cooker. No temperature unevenness is generated over 360 degrees around the side of the rice, and cooking without unevenness becomes possible.

Since the branch pipe 18 flow regulating valve 15 ₂ is provided, by adjusting the flow rate of air supplied to the air inlet 5in by operating the flow control valve 15 _2, discharged from the outlet of the exhaust passage 12 The amount of air mixed with the flue gas to be discharged can be changed, and thereby the temperature of the mixed gas of the flue gas and air discharged to the outside can be adjusted. Further, an appropriate cooling device or heating device is interposed in the branch pipe 18, and the temperature of the air supplied to the air inlet 5in of the first cooling air passage 5 is controlled, so that the combustion exhaust gas and air discharged to the outside are controlled. The temperature of the mixed gas may be adjusted.

  Thus, in this example, since a part of the combustion air supplied to the heating device 8 is used as the air source supplied to the first cooling air passage 5, the air in the first cooling air passage 5 is used. Although air is forcibly supplied to the inflow port 5 in, there is no need to newly provide an air supply system, and an advantage that the entire rice cooker can be finished at low cost is obtained.

  As described above, according to the rice cooker for business use of the present invention, the temperature of the combustion exhaust gas discharged to the outside can be lowered with a simple structure, the working environment is deteriorated, and malfunctions of devices, sensors, etc. Failure can be avoided. Moreover, since combustion exhaust gas is discharged | emitted from the circumference | surroundings of a rice cooker equally, the temperature difference by a place does not generate | occur | produce in the side part of a rice cooker, and rice cooking without a nonuniformity is attained. INDUSTRIAL APPLICABILITY The present invention is extremely useful in a field that requires a commercial rice cooking system for cooking a large amount of rice, and its industrial applicability is great.

DESCRIPTION OF SYMBOLS 1 Rice cooker 2 1st side wall 3 2nd side wall 4 3rd side wall 5 1st cooling air path 6 2nd cooling air path 7 Pot support 8 Heating device 9 Temperature sensor 10 Pipe line 11 Signal line 12 Exhaust path 13 Air source 14 ₁ , 14 _{2 On-} off valve 15 ₁ , 15 ₂ Flow rate adjustment valve 16 Mixer 17 Fuel gas source 18 Branch pipe P Rice cooker Pt Rice cooker collar S Internal space

Claims (3)

A rice cooker for business use having an internal space where an upper part that receives at least the bottom of the rice cooker is open, a first side wall that surrounds the side of the internal space, and a heating device provided at the bottom of the internal space, When the rice cooker is set on the upper surface of the first side wall, the rice cooker comes into contact with the lower surface of the rice cooker's buttock and is placed between the bottom of the rice cooker buttock and the upper surface of the first side wall of the rice cooker. A plurality of hook supports that form exhaust passages for combustion exhaust gas having a height of Dg are installed, and a first cooling air passage is formed outside the first side wall with the outer peripheral surface of the first side wall. two side walls are provided, said second side wall has a bent portion extending to the upper surface of the first side wall toward the 炊 rice machine inside at its upper end, the first cooling air passage outside communicating with the lower end portion An air inflow port between the lower surface of the bent portion and the upper surface of the first side wall at the upper end portion. An air outlet having a height Da formed, and the air outlet is located on the first side wall in a position facing and facing the outlet of the exhaust passage of the combustion exhaust gas, and the height Da and the A rice cooker for business use having a height Dg of (1/2) Dg ≦ Da ≦ 2Dg.   A third side wall that forms a second cooling air passage is provided between the second side wall and the outer peripheral surface of the second side wall, and the second cooling air passage is connected to the outside at the lower end portion. The rice cooker for business use according to claim 1, further comprising an air outlet at an upper end portion communicating with the outside.   The commercial rice cooker according to claim 1 or 2, wherein the heating device provided at the bottom of the internal space of the rice cooker is a Bunsen burner or a surface combustion burner.

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