JP2861751B2 - toaster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toaster for performing automatic baking.

[0002]

2. Description of the Related Art A conventional toaster automatic baking function is to set a heating time based on the time elapsed from the end of the previous baking, the temperature in the toaster body and the rate of change of this temperature, and the user inputs the number of breads. Thus, the heating time is corrected, and when the frozen bread is to be baked, the user inputs whether or not the bread is frozen, and the heating is adjusted according to the input.

[0003]

However, when the user inputs whether frozen or not, the user forgets to input or mistakenly inputs.
In this case, the baking of the toast was poor.

The present invention is intended to solve such a conventional problem, and detects the amount of water vapor emitted from a bread, and determines the state of the bread, that is, whether the bread is frozen or normal temperature, from the detected amount of water vapor. It is a first object of the present invention to provide a toaster having a function of determining heating power and heating time according to the state of bread, the humidity in the refrigerator, and the rate of temperature change.

Another object of the present invention is to provide a toaster having a function of facilitating the state determination by operating only the heating means in the toaster body when determining the state of the bread from the detected amount of water vapor. This is the second purpose.

[0006]

In order to achieve the first object, the present invention provides a net arranged in a toaster main body,
A heating unit capable of heating the bread placed on the net, a control unit for controlling energization to the heating unit, a temperature detecting element for detecting a temperature in the toaster body, and the heating unit starting heating A timing means for measuring the time since
Steam amount detecting means for detecting an amount of water vapor emitted from the pan when heated by the heating means; and cooling of the bread by using the detected value of the water vapor amount detecting means and the detected value of the temperature detecting element as inputs.
A state determining means for determining how much the degree of freezing is; and a thawing method for the heating means based on a determination result of the state determining means, a detection value of the temperature detection element, and a rate of change of the detection value .
Heating power and heating time, and baking heating power and heating
Determine the time, output to the control means and the thawing process
The toaster has a heating pattern determining means for determining a heating pattern formed by a baking process .

[0007] In order to achieve the second object, the present invention relates to a method for heating a bread placed in a toaster body and at least one of the breads placed below the mesh and placed on the mesh. Possible heating means, first control means for controlling energization of the heating means, second control means for controlling energization of the heating means below the mesh, and controlling the temperature in the toaster body. A temperature detecting element for detecting, a time measuring means for measuring a time from when the heating means starts heating, and a water vapor which is arranged above the heating means and which detects an amount of water vapor flowing out of the pan when heated by the heating means. Amount detection means, a detection value of the water vapor amount detection means and the temperature detection element
What is the degree of freezing of the bread
State determining means for determining whether or not the heating power for thawing and heating time of the heating means based on the determination result of the state determining means, the detected value of the temperature detecting element, and the rate of change of the detected value.
Determine the heating power and heating time for baking, the first
Output to the control means or the second control means, and
Determine the heating pattern consisting of the process and baking process
And a heating pattern determining means.

[0008]

According to the above means, the state of the bread, that is, whether the bread is frozen or not, is determined from the detection value of the water vapor amount detecting means, and the heating pattern is determined according to the state of the bread, the temperature in the refrigerator, and the temperature change rate. .

Further, when the state of the pan is determined from the detected value of the gas sensor, only the lower part of the heating means is operated, whereby the state can be easily determined.

[0010]

【Example】

(Embodiment 1) FIGS. 1, 2 and 3 show a first embodiment of the present invention.
This will be described based on FIG. First, the overall configuration of the present embodiment will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a main body of a toaster, in which a door 5 is provided on a front surface, a net 2 on which a pan is placed is disposed, and a heater 3 as a heating means is provided on the upper and lower portions of the net 2. The main body 1 has a temperature detecting element 4 such as a thermistor therein and a gas sensor 10 serving as a water vapor amount detecting means.
At the bottom, there are provided a timer 6 for measuring the time from the start of heating by the heater 3, and a controller 7 for controlling the heater 3. Further, the main body 1 includes a heating pattern determining unit 8 and a state determining unit 9. The state determination means 9 determines the state of the pan by using the amount of change in the measurement value of the gas sensor 10 and the detection value of the temperature detection element 4 as inputs. The heating pattern determining means 8 determines the heating time from the state determined by the state determining means 9, the temperature detected by the temperature detecting element 4, and the temperature change rate. In this embodiment, the timer 6, the controller 7, the heating pattern determiner 8, and the state determiner 9 are constituted by a microcomputer.

Hereinafter, the operation of the toaster of this embodiment will be described. The user opens the door 5, puts bread on the net 2, and closes the door 5. Next, when the user turns on a switch (not shown) and starts bread baking, the control means 7 controls the heating means 3.
Is operated, and the timer 6 measures the elapsed time from the start of the baking, and the gas sensor 10 is provided above the heater 3.
Measures the measured value V1 at the start of baking and the measured value V2 ta seconds after the start of baking, and outputs the difference dV between V2 and V1 as a humidity change. Further, the temperature detecting element 4 has a temperature T in the main body 1 at the start of the baking and the main body 1 for t seconds after the start of the baking.
The temperature change dT inside is detected.

The state judging means 9 judges from the humidity change dV and the temperature T whether the bread is in a frozen state or in a normal temperature state. The heating pattern determination means 8 determines a heating pattern (heating power and heating time at this heating power) from the determination result of the state determination means 9, the temperature T and the temperature change dT, and outputs the heating pattern to the control means 7. The control means 7 controls the heater 3 in accordance with the heating pattern and the time measured by the timing means 6. That is,
It operates as a toaster having a function of determining the state of the bread from the humidity change and the initial temperature, and determining the heating time according to the state of the bread, the temperature in the refrigerator, and the temperature change rate.

Next, the operation of the state determining means 9 of this embodiment will be described with reference to FIG. In the present embodiment, the state determining means 9 is configured by fuzzy inference that receives the amount of water vapor A coming out of the pan during heating and outputs the state. The inference rule is "if A is high, it is normal temperature bread. (State = 0)"
It consists of two rules: "If A is low, it is a frozen bread. (State = 1)". That is, the bread state is output as a numerical value between 0 and 1, which indicates the degree of freezing. The qualitative concept that A is low is quantitatively expressed by the membership function shown in FIG.

Next, the heating pattern determining means 8 of this embodiment
3 will be described with reference to FIGS. When the bread is frozen, if the bread is thawed at a lower temperature than the normal temperature bread and then baked at a high temperature, the baking color on the surface of the bread and the internal temperature can be appropriately baked. When baking after thawing, it is the heating time of the first thawing process that the conditions in the refrigerator need to be changed depending on the state before the start of the toast. Therefore, in this embodiment, the outputs of the heating pattern determining means 8 are used as the heating time of the thawing process and the heating time of the baking process.

For bread that has not been frozen at all,
The heating time of the thawing process is 0, and the heating time of the baking process differs depending on the conditions in the main body 1. In the case of bread that has been frozen, the heating time of the thawing process differs depending on the degree of freezing and the condition of the inside of the main body 1 at the start of the toast, and the heating time of the baking process is constant.

In this embodiment, the heating pattern determining means 8 comprises:
The temperature T, the temperature change rate dT, and the state determined by the state determination means 9 are input, and the heating pattern of the current baking is output by fuzzy inference. The inference rule is that if T is low, dT is small, and the state is frozen, the heating time of the thawing process is d11 and the heating time of the baking process is e11.
It consists of eight rules shown in FIG. D11 to e42 in FIG. 3 are real values. A qualitative concept such as T being “low” and dT being “small” is quantitatively expressed by the membership function shown in FIG.

As described above, according to the present embodiment, it is possible to provide a toaster having a function of determining a state from humidity and a change in temperature and determining a heating time from the state determined as the temperature and the change in temperature. Although an example using fuzzy inference as the state determination means 9 and the heating pattern determination means 8 has been described, a neural network or a method using a function may be used.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. Body 1
Are heaters 3a and 3b, which are heating means, and first control means 11a which controls energization of the heaters 3a and 3b.
Control means 11 for controlling the energization of heater 3b
b. In the present embodiment, the second control means 11b is constituted by a microcomputer. Others
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Hereinafter, the operation in the configuration of this embodiment will be described. The user first opens the door 5, then puts bread on the net 2, then closes the door 5 and then switches (not shown)
To start baking. Then, the second control means 11b operates the heater 3b, and the timekeeping means 6
Measures the elapsed time from the start of the baking, and after the gas sensor 10 as the water vapor amount detecting means detects the water amount A after ta seconds from the start of the baking, the control means 11a controls the heater 3a,
3b is operated.

The temperature detecting element 4 has a temperature T in the main body 1 at the start of baking and a temperature change d for t seconds after the start of baking.
T is detected. The state determination means 9 determines the state of the bread, that is, whether the bread is in a frozen state or a normal temperature state, based on the amount of steam A generated by the bread. The heating pattern determining means 8 determines a heating pattern from the determination result, the temperature T and the temperature change dT, and outputs the determined heating pattern to the control means 11a. The control means 11a controls the heaters 3a and 3b in accordance with the heating pattern and the time measured by the timing means 6.

That is, when the state of the pan is determined from the amount of water vapor, only the heater 3b is operated to operate as a toaster which facilitates the state determination. By operating only the lower part of the heating means during the state determination, the air in the main body 1 heated from below rises. At this time, the vapor generated from the bread is also included in the air and rises, so that the gas sensor 10 can easily detect the vapor.

Next, based on FIG. 6, the heaters 3a, 3b,
The operation of the control means 11a, 11b will be described. When the baking starts, the control means 11b operates the heater 3b.
That is, the control means 11b turns on the switch SW3.
At this time, the control unit 11a turns off the switches SW1 and SW2. After the gas sensor 10 detects the water vapor amount A ta seconds after the start of baking, the control unit 11a
a, 3b are operated. At this time, the control means 11b simultaneously turns on and off the switches SW1 and SW2.

As described above, according to the present embodiment, when determining the pan state from the detection value of the waste sensor 10, the heater 3
By operating only b, the state determination can be facilitated.

[0024]

As described above, according to the present invention, it is determined whether the state of the bread is frozen or normal temperature by using the detection value of the water vapor amount detecting means for detecting the amount of water vapor generated by the bread as an input. Since the heating power and the heating time with this heating power are determined from the judgment and the rate of change of the detection value of the temperature detecting element, the user sets whether to heat the frozen bread or the normal temperature bread. Good baking can be achieved without the baking, so that not only baking can be conveniently performed, but also poor baking can be prevented.

In the case where at least one heating means is arranged below the net on which the bread is placed and the temperature detecting means is arranged above the heating means, the bread is generated when the bread is heated. Since the water vapor rises and easily reaches the water vapor amount detecting means, the detection of the water vapor amount becomes easy, whereby it becomes easy to judge whether the bread is in a frozen state or a normal temperature state, and the bread is baked. It can be performed better.

[Brief description of the drawings]

FIG. 1 is a schematic view of a toaster according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a fuzzy inference menharship function of the state determination means of the toaster.

FIG. 3 is a diagram showing a rule of fuzzy inference of a heating pattern determining unit of the toaster.

FIG. 4 is a view showing a menhership function of fuzzy inference of the heating pattern determining means of the toaster.

FIG. 5 is a schematic view of a toaster according to a second embodiment of the present invention.

FIG. 6 is a view showing the operation of the lower control means of the toaster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Net 3 Heater 4 Temperature detection element 5 Door 6 Timekeeping means 7 Control means 8 State judgment means 9 Heating pattern determination means 10 Gas sensor

Continuing on the front page (72) Inventor Masafumi Sadahira 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. References JP-A-4-257623 (JP, A) JP-A-63-138689 (JP, A) JP-A-63-116999 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB Name) F24C 7/04 301 H05B 6/12 334,335 F24C 7/02 325

Claims (2)

(57) [Claims] 1. A net disposed in a toaster main body, a heating unit capable of heating a bread placed on the net, a control unit for controlling energization of the heating unit, and a temperature in the toaster main unit. A temperature detecting element for detecting the amount of water vapor, a time measuring means for measuring the time from the start of heating by the heating means, a water vapor amount detecting means for detecting the amount of water vapor coming out of the pan when heated by the heating means, and the water vapor amount Detection value of detection means
And the degree of refrigeration of the bread using the detection value of the
A state determining means for determining the degree of matching, a heating value for thawing of the heating means based on a determination result of the state determining means, a detection value of the temperature detecting element, and a rate of change of the detection value.
Power and heating time, baking heating power and heating time
Decide and output to the control means to defrost and bake
A heating pattern determining means for determining a heating pattern formed by a heating process . 2. A net arranged in the toaster main body, at least one heating unit arranged below the net and capable of heating a bread placed on the net, and a power supply to the heating unit controlled. A first control unit that controls the energization of the heating unit below the mesh, a temperature detection element that detects a temperature in the toaster body, and the heating unit starts heating. timing means for measuring the time from it, and the water vapor amount detecting means for detecting the amount of water vapor exiting the pan during heating by the heating means disposed above said heating means, a detection value of the water vapor amount detecting means The temperature detection
Using the detected value of the output element as an input, how much
A temperature determining element for determining whether the temperature is a degree, a heating value for thawing of the heating means,
The heating power and heating time for baking
Output to the first control means or the second control means.
Heating pattern consisting of thawing and baking processes
And a heating pattern determining means for determining the heating pattern.