JP3127614B2 - Bread making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bread maker for automatically baking bread at a predetermined time only by putting in bread ingredients.

[0002]

2. Description of the Related Art A conventional bread maker of this type generally has a construction as shown in FIGS. Hereinafter, the configuration will be described with reference to the drawings. 7 to 10
, 1 is a chassis, 2 is above the main body, 3 is below the main body, 4
Is a baking chamber, 5 is a motor, and in the baking chamber 4 are provided a kneading blade 6 driven by the motor 5 to knead the bread material.
A temperature detecting section 9 for detecting the temperature of the radiator is provided. The temperature detecting section 9 includes a thermistor 10, a contact member 11 that covers the thermistor 10 and contacts the bread container 7, and a holding plate 13 that holds the thermistor 10 via a mount 12.
And a mounting member 14 for fixing them to the firing chamber 4, and a cover member 15 for covering all of them. Reference numeral 16 denotes a thermal fuse fixed to the outer surface of the firing chamber 4 via a mounting bracket 17, and is covered by an insulating tube 18. Reference numeral 19 denotes a control device that controls energization of the motor 5 and the heater 8 based on the temperature information and time detected by the temperature detection unit 9 and automatically performs each of the steps of kneading, aging, fermentation, and firing. 10 and control device 19
An operation member 21 has a built-in control device 19 for setting a baking time, starting cooking, and the like.
Reference numeral 2 denotes a heat shield provided on the outer periphery of the firing chamber 4 to keep the temperature of the firing chamber 4, and reference numeral 23 denotes an outer lid having an inner lid 24 for opening and closing the firing chamber 4.

As another conventional example, as shown in FIGS. 11 and 12, the temperature detecting portion 25 is fixed to the outer surface of a baking chamber 27 by screwing via an attachment member 28 without abutting the bread container 26. Some were. 29 is a firing chamber 27
The heater 30 disposed therein has a controller 30 for controlling the energization of the heater 29 and the motor based on the temperature information and time detected by the temperature detector 25, and a heater 31 for the firing chamber 4 via a mounting bracket 32. Thermal fuse fixed to the outer surface.

[0004] In the conventional bread maker configured as described above, the dough is controlled to a predetermined temperature in the following manner. That is, as shown in FIGS. 10 and 12, when the temperature of the temperature detectors 9 and 25 becomes higher than a predetermined set temperature, the heaters 8 and 29 are not energized. Therefore, the temperature detectors 9 and 25 are maintained at the set temperature on average, and the temperature of the dough also changes corresponding to the temperature change of the temperature detectors 9 and 25.

[0005]

The conventional bread maker shown in FIGS. 7 to 10 is provided with a heat shield plate 22 so that the thermistor 10 can be lifted from the baking chamber 4 and the contact member 11 can be lifted.
As shown in FIG. 10, the temperature detector 9 substantially matches the temperature of the bread container 7 and accurately detects the temperature of the dough and controls as intended. However, since the number of components constituting the temperature detection unit 9 is large and the component shape is small, the temperature detection unit 9 is poor in assemblability and serviceability, and is expensive.

Another conventional example shown in FIGS. 10 and 11 does not include a heat shield plate, and attaches a temperature detecting portion 25 to the mounting member 2.
8 and directly fixed to the outer surface of the firing chamber 27, so that the number of parts is small, the assembling property is good, and the cost is low. As shown in FIG. 12, the temperature difference between the bread container 26 and the bread container 26 is easily generated, and the difference increases with time from ΔT1 to ΔT2. Further, ΔT1 and ΔT2 vary greatly depending on the room temperature. . Therefore,
The temperature detection unit 25 cannot accurately detect the temperature of the bread dough, and cannot control the temperature of the bread dough as intended in the fermentation and shaping fermentation processes that greatly affect the performance of the bread. Bad, with great variation.

Further, since the temperature fuses 16 and 31 are separately provided at positions away from the temperature detecting sections 9 and 25, a temperature difference occurs between the temperature fuses 16 and 31 and the temperature detecting sections 9 and 25. I was Moreover, in the conventional example shown in FIGS. 7 to 10, the temperature fuse 16 and the temperature detecting section 9 are connected to the firing chamber 4.
11 and 1 and are arranged in a thermally insulated positional relationship, so that it is difficult to grasp the correlation between the temperature differences.
In the other conventional example shown in FIG. 2, both the temperature fuse 31 and the temperature detecting unit 25 are directly attached to the outer surface of the firing chamber 27 having no heat shield plate. The difference fluctuated greatly. Therefore, the temperature range of the temperature fuses 16 and 31 to be operated becomes wider than the set temperature of the temperature detectors 9 and 25, and premature or late disconnection occurs depending on voltage fluctuations and room temperature conditions. There was a risk of a safety problem. In addition, since a mounting fuse for fixing the temperature fuse and the temperature detecting section to the firing chamber is separately required, the number of parts and the number of assembling steps are increased, and the cost is increased.

SUMMARY OF THE INVENTION The present invention solves such a problem, and simplifies the structure of the temperature detecting section and improves the assemblability while controlling the dough temperature as intended. A first object is to reduce man-hours and cost.

It is a second object of the present invention to reduce costs while preventing practical or safety problems due to defective operation of the thermal fuse.

[0010]

In order to achieve the above-mentioned object, a first means of the present invention is to provide a thermistor constituting a temperature detecting portion through a hole provided in a baking chamber and a pan container inside the baking chamber. as well as arranged so as not to contact, temperature detector
The cover or mounting member of the thermistor
Fermentation in which the temperature detection unit is fixed from the outside of the baking chamber while controlling the temperature of the temperature detection unit while closing the hole via
In the process, the rate of change in the
It was made .

The second means is to dispose a temperature fuse and a temperature detecting portion in the vicinity, and do not directly contact the firing chamber of the object to be detected.
Then, the temperature fuse and the temperature are set in the firing chamber through the mounting member.
The detection unit is integrally fixed.

The third means is that the temperature fuse and the temperature detecting section are brought close to each other and are integrally fixed to the firing chamber, and a concave portion is provided in a portion of the firing chamber where the temperature fuse contacts.

The fourth means is to integrally fix the temperature fuse and the temperature detecting portion, and form locking portions at both ends of the mounting member, and the locking portions are fitted in the firing chamber so that the mounting member can slide. Is provided with a fitting portion for temporary fixing, and the mounting member is fixed with one screw.

[0014]

According to the first aspect of the present invention, the temperature detecting portion can be constituted only by the thermistor, the mounting base for holding the thermistor, the cover member for covering the temperature detecting portion, and the mounting member for fixing these to the firing chamber. Therefore, the number of parts and the number of assembling steps can be significantly reduced, and the temperature detection unit is fixed from the outside of the firing chamber while the thermistor is arranged inside the firing chamber, thereby improving the assemblability while improving the assemblability. The internal atmosphere temperature can be detected. Also, by changing the duty ratio to the heater while keeping the control temperature of the temperature detection unit constant, even if a temperature difference occurs between the temperature detection unit and the bread container due to simplification of the temperature detection unit, the temperature difference is almost constant. Therefore, if the set temperature of the temperature detection unit is determined in consideration of these correlations, the temperatures of the bread container and the dough can be controlled as intended.

In the second means, by disposing the temperature fuse and the temperature detecting section in the vicinity, the temperature of the temperature fuse becomes substantially equal to the temperature of the temperature detecting section which is intentionally controlled. The temperature of the fuse can be easily estimated,
It is possible to set an accurate operating temperature, and to reduce the variation in the operation of the thermal fuse due to the voltage fluctuation and the room temperature fluctuation. Further, by integrally fixing the temperature fuse and the temperature detection unit, the number of components and the number of assembly steps can be reduced.

In the third means, by providing a concave portion in a portion of the firing chamber where the thermal fuse contacts, the contact area and gap between the thermal fuse and the firing chamber can be adjusted, and the temperature rise of the thermal fuse can be adjusted. Therefore, the operability of the thermal fuse can be optimized.

According to the fourth means, the fixing member is provided at both ends of the mounting member, and the mounting member is temporarily fixed to the firing chamber so as to be slidable, so that the mounting member for integrally fixing the temperature fuse and the temperature detecting portion is provided. It can be securely fixed with a single screw without causing parts such as thermal fuses to float, thereby improving the ease of assembly and service and reducing the number of parts while ensuring the necessary mounting strength. Can be planned.

[0018]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 6, reference numeral 40 denotes a chassis, a main body 41 formed of sheet metal, a motor 42, and a firing chamber 4.
3 and a container mount 44 are mounted. Motor 42
Is transmitted to the upper connector 49 via the small pulley 45, the belt 46, the large pulley 47, and the lower connector 48. Further, inside the baking chamber 43, there is provided a kneading blade 50 which is rotated via a connector 49 and kneads the bread material, and a detachable bread container 51 in which the bread material is set.
, A heater 52, and a temperature detector 53 for detecting the temperature in the firing chamber 43. Reference numerals 54 and 55 constitute a control device that controls the energization of the motor 42 and the heater 52 based on the temperature information detected by the temperature detection unit 53 and controls each process such as preheating, kneading, fermentation, shaped fermentation, and firing. A power supply board and an operation board, 56 is a flat cable connecting the power supply board 54 and the operation board 55, and 57 is an operation member having the operation board 55 built therein. The operation member sets a menu, a baking time, starts cooking, and the like. . Further, the temperature detection unit 5
Reference numeral 3 denotes a thermistor 58, a mount 59 for holding the thermistor 58, and a cover member 6 for covering the thermistor 58.
0, the lead 6 connecting the thermistor 58 and the control device
1, a heat-shrinkable tube 62 for insulating and protecting the connection between the thermistor 58 and the lead wire 61, a protective tube 63 for protecting the lead wire 61 from the edge, and a mounting member 64 for fixing these components to the firing chamber 43. The cover member 60 including the thermistor 58 is penetrated into the inside of the baking chamber 43 through a hole 65 provided on the side surface of the baking chamber 43, and the mounting member 64 is positioned so as not to come into contact with the bread container 51. It is attached to the outside surface of the firing chamber 43 through the intermediary of the firing chamber 43. Further, the temperature adjustment at the time of fermentation or shaped fermentation by the temperature detection unit 53 and the control device is performed by changing only the duty ratio when the heater 52 is ON while the set temperature is kept constant. Reference numeral 66 denotes a thermal fuse provided as a safety device. The thermal fuse is disposed near the temperature detecting unit 53 and is fixed to the outer surface of the firing chamber 43 integrally with the temperature detecting unit 53 via a mounting member 64. 67 is an insulating tube that covers the thermal fuse 66, and 68 is the thermal fuse 6 in the firing chamber 43.
A concave portion provided in the vicinity of contact with 6, an outer lid 69 having an inner lid 70 for opening and closing the firing chamber 43, and a power cord 71. At both ends of the cover member 60, mounting members 6 are provided.
4 are formed by bending one side straight and the other side by bending at right angles. A locking portion 75 to be provided protrudes. At this time, the shape dimensions and arrangement of the cover member 60, the mounting member 64, the hole 65, the slit 72, the locking portions 73, 75, and the fitting portion 74 are as shown in FIG.
The mounting member 64 is screw-fixed to the firing chamber 43 at a substantially central portion between the temperature detecting section 53 and the thermal fuse 66.

The operation of the bread maker constructed as described above will be described. When the bread material is set in the bread container 51 and the operation member 57 is operated to start cooking,
First, a preheating step of warming the bread material is started, and then a dough is made in a kneading process in which the kneading blades 50 knead the bread material, and degassing is performed several times in the middle while keeping the bread dough at the fermentation temperature by the heater 52. After the fermentation process and the shaping and fermentation process of finishing the dough while adjusting the shape,
Finally, a baking step of baking the expanded dough is performed, and the bread is baked.

Further, the temperature adjustment during fermentation or shaping fermentation by the temperature detecting section 53 and the control device is performed by changing only the energization rate when the heater 52 is ON while the set temperature is kept constant. Reference numeral 66 denotes a thermal fuse provided as a safety device, which is disposed near the temperature detecting section 53 and is fixed to the outer surface of the firing chamber 43 integrally with the temperature detecting section 53 via a mounting member 64. 67 is an insulating tube that covers the thermal fuse 66; 68 is a recess provided in the firing chamber 43 near the thermal fuse 66; 69 is an inner lid 70
And an outer lid 71 for opening and closing the firing chamber 43. Reference numeral 71 denotes a power cord. At both ends of the cover member 60, locking portions 73 engaged with slits 72 provided in the mounting member 64 are provided.
However, one is formed by bending the other straight at right angles,
At both ends of the mounting member 64, locking portions 75 to be engaged with fitting portions 74 provided in the firing chamber 43 are also provided to protrude. At this time, the cover member 60, the mounting member 64, the hole 65, the slit 7
2. The shape, dimensions and arrangement of the locking parts 73 and 75 and the fitting part 74 are determined so as to satisfy the dimensions and positional relationship shown in FIG.
The mounting member 64 is screwed and fixed to the firing chamber 43 at a substantially central portion between the temperature detecting section 53 and the temperature fuse 66.

The operation of the bread maker configured as described above will be described. When the bread material is set in the bread container 51 and the operation member 57 is operated to start cooking,
First, a preheating step of warming the bread material is started, and then a dough is made in a kneading process in which the kneading blades 50 knead the bread material, and degassing is performed several times in the middle while keeping the bread dough at the fermentation temperature by the heater 52. After the fermentation process and the shaping and fermentation process of finishing the dough while adjusting the shape,
Finally, a baking step of baking the expanded dough is performed, and the bread is baked. During this time, the atmosphere inside the baking chamber 43 and the dough are supplied by the heater 52, the temperature detecting section 53,
The controller always controls the temperature to be optimal for baking high-quality bread, and even if the temperature becomes uncontrollable due to any factor, the thermal fuse 66 can be accurately controlled without causing premature or late blow. Operate and ensure safety.

As described above, according to the present embodiment, the thermistor 58 is disposed in the baking chamber 43 through the hole 65 from the outside of the baking chamber 43 without abutting on the bread container 51.
As compared with the conventional example shown in FIG. 1, the number of parts constituting the temperature detecting section 53 can be reduced from 11 to 7 to simplify the structure, and the material cost and the number of assembling steps can be reduced, resulting in a large cost. Down can be planned. Further, since the thermistor 58 does not directly or indirectly contact the bread container 51, the temperature detected by the thermistor 58 differs from the temperature of the bread container 51 and the bread dough, but the thermistor 58 disposed in the baking chamber 43. 11 can detect the ambient temperature inside the firing chamber 43, the temperature difference is kept substantially constant.
Can be prevented from greatly expanding and changing as in the conventional example shown in FIG. Therefore, it is possible to estimate the dough temperature from the temperature difference and the temperature difference detected by the temperature detection unit 53, and to secure the dough temperature detection performance necessary for baking high-quality bread.

Further, since the thermistor 58 is not brought into contact with the bread container 51, the temperature of the temperature detecting section 53 is kept constant, whereas the temperature of the bread container 51 and the bread dough rises little by little. In the fermentation step in which the inside of the firing chamber 43 is maintained at a constant temperature for a long time of one hour or more, the temperature difference changes by about 2 to 3 ° C., but the control temperature of the temperature detection unit 53 is kept constant as shown in FIG. The microcomputer of the control device is programmed so as to reduce the energization rate to the heater 52 during the fermentation process, thereby preventing the temperature of the bread container 51 and the dough from rising. The temperature difference of the bread container 51 can be kept almost constant. Moreover, by appropriately adjusting the degree and timing of changing the duty ratio in accordance with the use conditions, the temperature difference can be easily maintained constant even when the room temperature or the power supply voltage fluctuates, as described above. . Therefore, even if the temperature difference occurs due to the elimination of the heat shield plate and the simplification of the temperature detection unit 53, if the control temperature of the temperature detection unit 53 is determined in consideration of these correlations, the temperature of the bread container 51 and the bread dough is determined. Can be controlled as intended.

The temperature fuse 66 is connected to the temperature detecting section 53.
Can be correlated with the temperature of the temperature fuse 66 and the temperature of the temperature detector 53 that is intentionally controlled, so that the temperature of the temperature fuse 66 at the time of practical use can be easily estimated and accurate. Operating temperature can be set, and the temperature fuse 66 due to voltage fluctuation or room temperature fluctuation can be set.
Can be reduced and safety can be improved. Furthermore, by integrally attaching the temperature fuse 66 and the temperature detection unit 53 via the attachment member 64, the number of parts and the number of assembly steps can be reduced.

In general, a commercially available high-precision thermal fuse has a discontinuous operating temperature and a fixed specification in increments of 10 to 20 ° C., and the operating temperature cannot be freely determined. If there are restrictions on the mounting position, it may be difficult to ensure optimal operability,
In some cases, the temperature fuse was prematurely or slowly blown due to fluctuations in the power supply voltage or room temperature. However, as shown in FIG. 5, a concave portion 68 is provided in a portion of the firing chamber 43 where the thermal fuse 66 contacts, and by changing the width and depth of the concave portion 68, the contact area and the gap between the thermal fuse 66 and the firing chamber 43 can be reduced. Change, adjust the heat conduction and cooling to the thermal fuse 66,
Since the temperature rise of the thermal fuse 66 can be adjusted, even if the mounting position of the thermal fuse 66 is restricted,
The operability of the thermal fuse 66 can be optimized.

Further, the cover member 60 and the mounting member 6
4, the cover member 60 is first passed through the hole 65 by determining the shape, dimensions, and arrangement of the hole 65, the locking portions 73, 75, and the fitting portion 74 so as to satisfy the dimensions and positional relationship shown in FIG. While being inserted into the firing chamber 43, the upper locking portion 75 is inserted into the fitting portion 74 as far as it will go, and then the lower locking portion 75 is fitted to the fitting portion 74 while sliding the mounting member 64 downward. When the mounting member 64 is mounted, the mounting member 64 can be temporarily slidably fixed to the firing chamber 43, so that the screwing operation between the mounting member 64 and the firing chamber 43 can be facilitated. Also, the mounting member 6
4 is locked by the fitting of the locking portion 75 and the fitting portion 74, so that the mounting member 64 is tightened with a single screw at a substantially central portion between the temperature detecting portion 53 and the temperature fuse 66, and the temperature is reduced. The fuse 66 and the thermistor 58 can be reliably fixed to the firing chamber 43 while being prevented from floating. Therefore, it is possible to improve the assemblability and serviceability and reduce the number of parts while securing the necessary mounting strength.

As shown in FIG. 3, locking portions 73 formed by bending only one side at a right angle are formed at both ends of the cover member 73, and the locking portions 73 extending straight are engaged with the slits 72 as they are. By inserting only the locking portion 73 bent at the other right angle into the slit 72 and then bending and engaging with the mounting member 64, the cover member 73 can be securely fixed to the mounting member 64. Only one caulking process of a minute component such as a cover member is performed to improve assemblability and worker safety, and unnecessary stress applied to the thermistor 58 via the mounting member 64 and the cover member 73 during the caulking process. Can be excluded, and a defect such as breakage of the thermistor 58 can be prevented.

[0028]

As described above, the present invention simplifies the structure of the temperature detecting section by disposing the temperature detecting section in the baking chamber through the hole from the outside of the baking chamber without making contact with the bread container. The number of points can be reduced, and the ambient temperature inside the firing chamber can be detected. Also, by changing the duty ratio to the heater while keeping the control temperature of the temperature detection unit constant,
Even if the room temperature or the power supply voltage fluctuates, the temperature difference between the temperature detection unit and the bread container can be kept constant, so that the configuration of the main body such as the temperature detection unit is simplified, and the temperature difference occurs between the temperature detection unit and the bread container. However, if the control temperature of the temperature detection unit is determined in consideration of the temperature difference, the temperatures of the bread container and the dough can be controlled as intended. Therefore, it is possible to reduce material costs and assembling man-hours, and to achieve a large cost reduction, while maintaining quality such as the quality of bread.

Further, by arranging the thermal fuse and the temperature detecting part close to each other and integrally fixing the thermal fuse to the firing chamber via the mounting member, the operating temperature of the thermal fuse can be appropriately set, and the power supply voltage and the power supply voltage can be controlled. In addition to preventing variations in the operation of the thermal fuse due to fluctuations in room temperature, the number of components and the number of assembly steps for fixing the thermal fuse and the temperature detection unit can be reduced, so that cost can be reduced while improving safety. .

Further, by providing a concave portion in a portion of the firing chamber where the thermal fuse contacts, the width and depth of the concave portion are changed to change the contact area and the gap between the thermal fuse and the firing chamber, thereby controlling the temperature rise of the thermal fuse. Therefore, the operability of the thermal fuse can be optimized even if there are restrictions on the mounting position of the thermal fuse.

In addition, locking portions are formed at both ends of a mounting member such as a temperature detecting portion, and fitting portions are provided in the firing chamber, where the locking portions are fitted to temporarily fix the mounting member slidably.
By fixing the mounting member with one screw, it is possible to improve the assemblability and serviceability and reduce the number of parts while preventing floating of the thermal fuse and securing necessary mounting strength.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a bread maker according to an embodiment of the present invention.

FIG. 2 is a perspective view of a bread maker with a main body removed in one embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a configuration of a temperature detecting unit according to one embodiment of the present invention.

FIG. 4 is a plan view showing the shape and dimensions of a mounting portion of a temperature detecting portion according to an embodiment of the present invention.

FIG. 5 is a sectional view of a mounting portion of a thermal fuse according to an embodiment of the present invention.

FIG. 6 is a temperature control characteristic diagram according to an embodiment of the present invention.

FIG. 7 is a front sectional view of a conventional bread maker.

FIG. 8 is a side sectional view of a conventional bread maker.

FIG. 9 is a detailed sectional view of a temperature detection unit of a conventional bread maker.

FIG. 10 is a temperature control characteristic diagram of a conventional bread maker.

FIG. 11 is a sectional view of a bread maker showing another conventional example.

FIG. 12 is a temperature control characteristic diagram of a bread maker showing another conventional example.

[Explanation of symbols]

 43 Baking Room 51 Bread Container 52 Heater 53 Temperature Detector 58 Thermistor 60 Cover Member 64 Attachment Member 65 Hole 66 Thermal Fuse 68 Depression 73 Locking Portion 74 Fitting Portion 75 Locking Portion

Continuation of front page (72) Inventor Ikuko Tanaka 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-293816 (JP, A) JP-A-3-195518 (JP) JP-A-63-216511 (JP, A) JP-A-2-239818 (JP, A) JP-A-63-111828 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) A47J 37/00 301

Claims (4)

(57) [Claims] 1. A baking chamber provided with a bread container, a heater, and a temperature detecting section, a motor, and a control device for controlling energization of the heater, the motor, and the like, and a part of the temperature detecting section penetrates the baking chamber. A thermistor forming a temperature detecting unit is disposed inside the baking chamber through the hole so as not to contact the bread container, and a thermistor forming the temperature detecting unit is provided.
The hole through a cover member or a mounting member of
In the fermentation process where the temperature detection unit was fixed from the outside of the firing chamber and the control temperature of the temperature detection unit was kept constant,
Bread maker that changes the power supply rate to the lower direction . 2. A baking chamber provided with a bread container, a heater, and a temperature detecting section, a motor, and a control device for controlling energization of the heater, the motor, and the like, wherein a part of the temperature detecting section penetrates the baking chamber. A thermistor forming a temperature detecting unit is disposed inside the baking chamber through the hole so as not to contact the bread container, and a thermistor forming the temperature detecting unit is provided.
The hole through a cover member or a mounting member of
While fixing the temperature detector from the outside of the firing chamber, place a temperature fuse near the temperature detector and place it in the firing chamber for the object.
While making direct contact, the baking chamber
Bread maker with temperature fuse and temperature detector fixed together . 3. The bread maker according to claim 2, wherein the thermal fuse and the temperature detecting portion are closely fixed to the baking chamber integrally with each other, and a concave portion is provided in a portion of the baking chamber where the thermal fuse contacts. 4. A locking member is formed at both ends of a mounting member for fixing a temperature detecting portion, a temperature fuse, and the like to a firing chamber.
3. The bread maker according to claim 2, wherein a fitting portion is provided in the baking chamber, the fitting portion being fitted to temporarily fix the mounting member slidably, and the mounting member is fixed with a single screw.