JP2017067357A - Range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood that in a case where fire occurs during cooking, prevents flame of the fire from entering inside the range hood.SOLUTION: A range hood includes a temperature sensor 6 configured to detect temperature of soot or the like generated by cooking, and a control device 7, and has an operation stop mode 72 in which when a temperature rise rate from a time point when a detection temperature of the temperature sensor 6 becomes a setting temperature is equal to or more than a setting value, the control device 7 stops operation of the range hood, wherein the setting temperature is equal to or less than a dangerous temperature at which hindrance occurs in the operation of the range hood.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a range hood that is installed around a cooking heater and collects and discharges oily smoke generated by cooking.

Conventionally, various indoor circulation type range hoods have been proposed that are installed around cooking heaters, collect oil smoke, fuel gas, odor, etc. (hereinafter referred to as oil smoke) generated by cooking and discharge them indoors. Yes.
In the indoor circulation type range hood, the collected oily smoke and the like are passed through a filter unit to remove oils and fats, odors and soot from the oily smoke and the like, and are discharged into the room as clean air.

On the other hand, when cooking with a cooking heater, a fire due to cooking such as a tempura fire may occur, and a flame due to the fire may enter the range hood.
When the filter unit is flammable, when a fire due to cooking occurs, the filter unit may burn due to a flame caused by a fire that has entered the range hood. In addition, when a flame due to a fire enters the inside of the range hood, there is a risk that the flame blows out from the outlet for discharging air into the room and burns out.

A range hood that can solve this problem is proposed in Patent Document 1.
That is, it is a range hood in which a blower, an electric shutter, and a filter unit are provided in the hood, and a temperature sensor that detects the temperature of oil smoke or the like collected in the hood is attached to the hood.

The range hood drives the blower and opens the electric shutter, thereby collecting oily smoke generated by cooking in the hood and discharging it into the room through the electric shutter and the filter unit.
When fire is caused by cooking when oil smoke or the like is discharged into the room as described above (that is, during range hood operation), the fire caused by cooking occurs when the temperature detected by the temperature sensor reaches the set temperature. Detect the occurrence and stop the blower or close the electric shutter so that the fire flame does not enter the range hood so that the filter unit does not burn with the fire flame.

  Moreover, in patent document 2, the hood which has a suction inlet mainly in an island kitchen is provided in the back | inner side of the heating appliance for cooking in the top plate of a cooking stand, and the air blower which sucks the oil smoke etc. which are suck | inhaled from the suction mouth of a hood There has been proposed a range hood in which a main body having an inside is provided in a cooking table.

JP 2011-58762 A JP 2007-29389 A

However, since the range hood proposed in Patent Document 1 stops the blower and closes the electric shutter when the temperature sensor detects the set temperature, the set temperature is a value when a fire is occurring. .
This is because if the set temperature is lower than the temperature at the time of the fire, the blower stops and the electric shutter is closed even when the filter unit does not burn without a fire due to cooking. Since problems such as lowering the operating efficiency of the range hood occur, the set temperature is set to the temperature at the time of the fire.
Further, there is a time lag after the temperature sensor detects the set temperature until the blower stops and the electric shutter is closed.
For these reasons, air (fire flame) above the set temperature may enter the range hood before the temperature sensor detects the set temperature, the blower stops, and the electric shutter is closed.

For this reason, when a fire due to cooking actually occurs, flames enter the range hood before the blower is stopped after the temperature sensor detects the set temperature and the electric shutter is closed, and the filter unit fires. It is dangerous because it may burn with flames.
This is more likely to occur in the case of a fire with a sudden rise in temperature.

  In the range hood proposed in Patent Document 2, the distance between the cooking heater (cooked food) and the hood inlet is very short compared to the range hood attached to the ceiling. There is a higher risk that the filter unit will burn.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a range hood that prevents a fire flame from entering the range hood when a fire due to cooking occurs. It is.

The present invention is a range hood that collects and discharges oil smoke generated by cooking by driving a blower,
A temperature sensor that detects the temperature of the collected oily smoke, and a control device that controls the operation of the range hood according to the temperature detected by the temperature sensor;
The control device has an operation stop mode that calculates a temperature increase rate from the time when the temperature detected by the temperature sensor reaches a set temperature, and stops the operation of the range hood when the temperature increase rate is equal to or higher than the set value. And
The set temperature is a range hood that is lower than a dangerous temperature that hinders operation of the range hood.

  In the range hood of this invention, the said control apparatus can be set as the structure which has several operation stop modes from which the setting value of preset temperature and a temperature increase rate each differ.

In the range hood of the present invention, the control device has a plurality of operation stop modes with different set values of the set temperature and the temperature increase rate,
The set value of the temperature rise rate in the shutdown mode with a low set temperature is larger than the set value of the temperature rise rate in the shutdown mode with a high set temperature, and the temperature rise rate is calculated in one shutdown mode with a low set temperature. When the temperature sensor detects a set temperature of another operation stop mode having the next highest set temperature in the middle of the operation, the temperature increase rate can be calculated in the other operation stop mode.

  If it does in this way, it can detect earlier that it rises to the dangerous temperature which may have caused the fire by cooking.

In the range hood of the present invention, the control device has a plurality of operation stop modes with different set values of the set temperature and the temperature increase rate,
The set value of the temperature rise rate in the shutdown mode with a low set temperature is larger than the set value of the temperature rise rate in the shutdown mode with a high set temperature, and the calculation of the temperature rise rate is completed in one shutdown mode with a low set temperature After that, the temperature increase rate can be calculated in the operation stop mode at the set temperature corresponding to the temperature detected by the temperature sensor at the end.

  In the range hood of the present invention, the control device has an abnormal operation stop mode, and the abnormal operation stop mode is predetermined after the temperature sensor detects the dangerous temperature and the dangerous temperature. Stops the operation of the range hood when it detects a dangerous temperature or more after a lapse of time, and stops the operation of the range hood if the temperature sensor detects a dangerous temperature after a predetermined time has elapsed after detecting the dangerous temperature. It can be set as the structure which does not.

  By doing in this way, the range hood does not stop in the case of an abnormality where the temperature above the dangerous temperature has occurred for a time shorter than the predetermined time, so the range hood did not stop operation unnecessarily and occurred during cooking Oil smoke etc. can be discharged reliably.

In the range hood of the present invention, the control device has an operation return mode,
In the operation return mode, the temperature sensor detects the operation return set temperature after the range hood is stopped in the operation stop mode, and detects the temperature less than the operation return set temperature after a specified time has elapsed after detecting the operation return set temperature. In such a case, the operation of the range hood is resumed.
The operation return set temperature may be lower than the set temperature in the operation stop mode.

  If it does in this way, when it escapes from the dangerous temperature which may have generated the fire which arose by cooking, cooking can be restarted reliably without malfunctioning.

In the range hood of the present invention, the range hood is an indoor circulation type having a filter unit,
The dangerous temperature is a temperature at which a fire may have occurred,
The operation stop of the range hood may be a combination of any one or a combination of stop of the blower, closing of the electric shutter, and turning off the energization of the range hood.

  If it does in this way, when the fire by cooking arises, the flame by a fire will enter the inside of a range hood, will ignite a filter unit, and will not burn. Moreover, the flame by a fire penetrates the inside of a range hood, passes through the inside of a range hood, and does not blow a flame from an exhaust port.

  According to the range hood of the present invention, the operation of the range hood is stopped immediately when it is determined that the temperature rises to a dangerous temperature at which cooking may cause a fire. Absent.

It is sectional drawing which shows embodiment of a range hood. It is explanatory drawing of a control apparatus. It is a chart which shows an example of operation in stop mode. It is a graph which shows the other example of operation | movement in a driving | operation stop mode. It is a chart which shows an example of operation in abnormal operation stop mode. It is a graph which shows the other example of operation | movement of the operation stop mode at the time of abnormality. It is a graph which shows an example of operation | movement in driving | operation return mode. It is a chart which shows an example of operation of other embodiments of operation stop mode.

The whole structure of the range hood of this invention is demonstrated based on FIG.
The range hood includes a hood 2, a main body 3, a blower 4, and a filter unit 5.
The hood 2 has a hood main body 20, a suction part 21, and a discharge part 22.
The hood main body 20 has a suction port 20a, and the hood main body 20 is provided with a temperature sensor 6 for detecting the temperature of air sucked into the suction port 20a (that is, oil smoke generated during cooking).
The suction part 21 has a suction passage 21a communicating with the suction port 20a.
The exhaust part 22 has an exhaust passage 22a that opens into the room.

The hood 2 is installed in the cooking table 1 by inserting and fixing the lower part of the suction part 21 and the discharge part 22 behind the cooking heater 11 in the top plate 10 of the cooking table 1.
The hood main body 20 of the hood 2 is positioned above the cooking heater 11, and the oil smoke generated during cooking rises toward the suction port 20 a of the hood 20.

The main body 3 has an inflow path 30, a blower housing chamber 31, a filter unit mounting chamber 32, and an outflow path 33.
The blower 4 is housed in the blower housing chamber 31. The blower 4 has a fan 41 driven by a motor 40. The inflow passage 30 is in open communication with the suction side of the blower 4, and the discharge side is in open communication with the filter unit mounting chamber 32.
The filter unit 5 is mounted in the filter unit mounting chamber 32. The filter unit 5 includes an oil adsorption filter 50, a smoke removal filter 51, a deodorization filter 52, and an air filter 53.

  The main body 3 is installed in the cooking table 1. The inflow passage 30 and the suction passage 21a communicate with each other. The outflow passage 33 and the exhaust passage 22a communicate with each other.

The range hood operates as follows.
By energizing the motor 40 and rotating the fan 41 (driving the blower 4), oily smoke generated during cooking passes through the suction port 20a, the suction passage 21a, and the inflow passage 30 and is sucked in by the blower 4.
Oil and fat sucked in are removed from the oil and fat by the oil adsorption filter 50, the smoke is removed by the smoke removing filter 51, the odor is removed by the deodorizing filter 52, and fine dust and dust are removed by the air filter 53. It becomes clean air.
Clean air is discharged into the room through the outflow passage 33 and the exhaust passage 22a.
Thereby, the range hood of embodiment is an indoor circulation type range hood.

The control device will be described with reference to FIG.
The control device 7 includes a controller 70 such as a microcomputer.
The controller 70 controls the speed by energizing the motor 40 of the blower 4 in accordance with an operation signal input from the operation member 71.
For example, when a strong operation signal is input from the operation member 71, the motor 40 is rotated at a high speed. When the medium operation signal is input, the motor 40 is rotated at medium speed. When the weak operation signal is input, the motor 40 is rotated at a low speed.
When a stop signal is input from the operation member 71, the energization to the motor 40 is stopped and the blower 4 is stopped.

  The controller 70 controls the operation of the range hood according to the detected temperature input from the temperature sensor 6 when either a strong, medium, or weak operation signal is input from the operation member 71 (during range hood operation). . For example, the energization to the motor 40 is stopped and the blower 4 is stopped.

Next, the operation based on the detected temperature input from the temperature sensor 6 will be described.
The controller 70 includes an operation stop mode 72 for stopping the operation of the range hood, an operation stop mode 73 for abnormal conditions, and an operation return mode 74 for restarting the range hood 1 that has been stopped.
In the operation stop mode 72, the function of detecting the temperature increase rate from the time when the temperature detected by the temperature sensor 6 reaches the set temperature and the operation of the range hood are stopped when the detected temperature increase rate is equal to or higher than the set value. It has an operation stop function that outputs a signal.
That is, when the temperature increase rate is equal to or higher than the set value, it is determined that the temperature rises to a dangerous temperature at which cooking may have occurred, and an operation stop signal is output to stop the operation of the range hood.

The set temperature is lower than the dangerous temperature. Preferably, the detected temperature does not increase to a dangerous temperature due to a time lag from when the operation stop signal is output until the range hood stops operating.
The dangerous temperature is a temperature that hinders the operation of the range hood. For example, the temperature at which the filter unit 5 starts to burn.
In the case of a range hood that does not include the filter unit 5, even if the range hood does not include the filter unit 5, the inside of the range hood may be deformed by high-temperature heat and cause troubles in operation. The temperature at which there is a possibility that a fire has occurred and the temperature at which the inside of the range hood starts to be deformed or the like when a fire has occurred and a flame has been drawn in is defined as a dangerous temperature.

The temperature increase rate is a temperature envelope determined by the temperature value increased in a certain time, and is calculated by the temperature (set temperature) detected by the temperature sensor 6 and the detected temperature detected by the temperature sensor 6 after a certain time has elapsed. The
The set value of the temperature rise rate is the maximum value of the temperature that rises in a certain time.
Stopping the operation of the range hood means that oil smoke generated during cooking of the range hood does not enter the range hood. For example, energization to the motor 40 of the blower 4 is stopped, the blower 4 is stopped, and oil smoke or the like is prevented from entering the inside of the range hood 1.
The operation of the range hood may be stopped by providing an electric shutter on the suction side of the blower 4 and closing the electric shutter. Alternatively, the operation of the range hood may be stopped by simultaneously stopping the blower and closing the electric shutter. Further, the energization to the range hood 1 may be turned off to stop the operation.

A specific example of the operation stop mode 72 will be described.
The dangerous temperature is 70 ° C, and the set temperature is 58 ° C.
The temperature rising rate is set to 5 ° C. for the temperature rising rate.
When the temperature sensor 6 detects 63 ° C. or more 1 second after the temperature sensor 6 detects 58 ° C., the controller 70 determines that the temperature rises to a dangerous temperature at which cooking may have occurred, The power supply to the motor 40 is turned off.

Since it is like this, when the fire by cooking generate | occur | produces, the flame (air more than dangerous temperature (70 degreeC)) by a fire does not enter the inside of a range hood.
Therefore, when a fire due to cooking occurs, the filter unit 5 does not burn with fire flames. Moreover, the flame by a fire penetrates the inside of a range hood, passes through the inside of a range hood, and does not blow a flame from an exhaust port.

In the embodiment, a plurality of operation stop modes 72 are provided.
Each operation stop mode 72 has a different set temperature and set temperature rise rate.
The set value of the temperature rise rate is larger as the set temperature is lower, and if the shutdown mode with the lower set temperature rises to the next higher set temperature while calculating the temperature rise rate, the next higher set temperature The operation stop mode starts calculating the rate of temperature rise.
That is, when the temperature sensor 6 detects a lower set temperature, and the temperature sensor 6 detects the next higher set temperature while the operation stop mode at the lower set temperature is calculating the rate of temperature rise, A high set temperature shutdown mode calculates the rate of temperature rise. This operation is sequentially performed.

Specifically, it has 1st, 2nd, 3rd, 4th, 5th operation stop mode 72-1, 72-2, 72-3, 72-4, 72-5.
The first to fifth operation stop modes 72-1 to 72-5 have first to fifth set temperatures and set values of first to fifth temperature increase rates, respectively.
The first preset temperature is the lowest, the second preset temperature is higher than the first preset temperature, the third preset temperature is higher than the second preset temperature, the fourth preset temperature is higher than the third preset temperature, and the fifth preset temperature is the first preset temperature. 4 Highest than the set temperature.
The set value of the first temperature increase rate is the largest, and the set value of the second temperature increase rate is smaller than the set value of the first temperature increase rate.
The set value of the third temperature increase rate is smaller than the set value of the second temperature increase rate, and the set value of the fourth temperature increase rate is smaller than the set value of the third temperature increase rate.
The set value of the fifth temperature increase rate is smaller than the set value of the fourth temperature increase rate and is the smallest.

For example, the dangerous temperature is 70 ° C., the first set temperature is 58 ° C., the second set temperature is 60 ° C., the third set temperature is 62 ° C., the fourth set temperature is 64 ° C., and the fifth set temperature is 66 ° C. .
The fixed time of the first temperature increase rate is 1 second, and the set value is 5 ° C.
The fixed time of the second temperature increase rate is 1 second, and the set value is 4 ° C.
The fixed time of the third temperature increase rate is 1 second, and the set value is 3 ° C.
The fixed time of the fourth temperature increase rate is 1 second, and the set value is 2 ° C.
The fixed time of the fifth temperature increase rate is 1 second, and the set value is 1 ° C.

That is, in the first operation stop mode 72-1, it is determined that the temperature sensor 6 has risen to a dangerous temperature that may have caused a fire when the temperature sensor 6 detects 58 ° C or more and detects 63 ° C or more after 1 second. Outputs a stop signal.
In the second operation stop mode 72-2, when the temperature sensor 6 detects 60 ° C., the second operation stop mode 72-2 determines that the temperature has risen to a dangerous temperature that may cause a fire when it detects 64 ° C. or more after 1 second. Is output.
In the third operation stop mode 72-3, when the temperature sensor 6 detects 62 ° C., when it detects 65 ° C. or more after 1 second, it is determined that the temperature has risen to a dangerous temperature at which a fire may have occurred. Is output.
In the fourth operation stop mode 72-4, when the temperature sensor 6 detects 64.degree. C., if it detects 66.degree. Is output.
In the fifth operation stop mode 72-5, when the temperature sensor 6 detects 66 ° C., and when it detects 67 ° C. or more after 1 second, it is determined that the temperature will rise to a dangerous temperature at which a fire may have occurred. Is output.

When the temperature detected by the temperature sensor 6 rises as indicated by A in FIG. 3, the temperature sensor 6 detects 62 ° C. one second after detecting 58 ° C., and the first temperature increase rate setting value is detected. Since the temperature does not exceed 5 ° C., the first operation stop mode 72-1 determines that the temperature does not rise to a dangerous temperature at which a fire may have occurred, and does not output an operation stop signal.
Since the temperature sensor 6 detects 60 ° C. 0.5 seconds after detecting 58 ° C., the second operation stop mode 72-2 is calculated while the first operation stop mode 72-1 is calculating the temperature increase rate. Starts calculating the rate of temperature rise.
One second after temperature sensor 6 detects 60 ° C., 65 ° C. is detected, and the second temperature rise rate set value exceeds 4 ° C. Therefore, the second operation stop mode 72-2 may cause a fire due to cooking It is determined that the temperature rises to a certain dangerous temperature, an operation stop signal is output, the power supply to the motor 40 is turned off, and the operation of the range hood is stopped.

When the temperature detected by the temperature sensor 6 rises as shown in FIG. 4B, it is determined that the first operation stop mode 72-1 does not rise to a dangerous temperature at which a fire may have occurred, as described above. Does not output the operation stop signal.
Since the temperature sensor 6 detects 60 ° C. 0.5 seconds after detecting 58 ° C., the second operation stop mode 72-2 is calculated while the first operation stop mode 72-1 is calculating the temperature increase rate. Starts calculating the rate of temperature rise.
Since the temperature sensor 6 detects 63 ° C. one second after detecting 60 ° C. and does not exceed the set value 4 ° C. of the second temperature increase rate, the second operation stop mode 72-2 may have a fire. It is judged that the temperature will not rise to a certain dangerous temperature, and the operation stop signal is not output.

Since the temperature sensor 6 detects 62 ° C. 0.5 seconds after detecting 60 ° C., the third operation stop mode 72-3 while the second operation stop mode 72-2 is calculating the rate of temperature increase. Starts calculating the rate of temperature rise.
Since the temperature sensor 6 detects 67 ° C. one second after detecting 62 ° C. and exceeds the set value 3 ° C. of the third temperature increase rate, the third operation stop mode 72-3 may cause a fire due to cooking It is determined that the temperature rises to a certain dangerous temperature, an operation stop signal is output, the power supply to the motor 40 is stopped, and the operation of the range hood is stopped.

Thus, even when the temperature sensor 6 detects a temperature lower than the dangerous temperature (70 ° C.), it is predicted that the temperature will rise to a dangerous temperature where a fire due to cooking may have occurred based on the temperature increase rate. Because the range hood is stopped, air above the dangerous temperature will not enter the range hood.
In addition, since there is a plurality of operation stop modes, one operation stop mode with a low set temperature calculates the temperature increase rate, and the operation stop mode with the next highest set temperature starts detecting the temperature increase rate. It is possible to detect earlier that the temperature rises to a dangerous temperature at which a fire due to cooking may have occurred.

Since the product according to the present invention is a range hood that sucks in air with a blower, a suction airflow is always generated when the product is used. If this is detected, it may cause malfunction.
Therefore, in the present invention, the instantaneous change described above is not detected by comparison with the temperature after a certain measurement time.
However, such a long measurement time is a disadvantageous condition for the purpose of quickly capturing an abnormal temperature from a temperature change.
For this reason, the present invention provides an effect of solving this demerit and preventing malfunction due to noise by preparing a plurality of modes and making them overlap each other within a predetermined time and simultaneously executing other modes. I am doing so.
This fixed time is preferably 0.5 seconds or more, more preferably 1 second or more.

The abnormal operation stop mode 73 is determined to be a dangerous temperature at which a cooking fire may have occurred when the detected temperature of the temperature sensor 6 reaches the dangerous temperature and the dangerous temperature is detected even after a predetermined time has elapsed. Then, an operation stop signal is output to stop the range hood.
Further, when the temperature sensor 6 detects a dangerous temperature and detects a temperature lower than the dangerous temperature after a predetermined time has elapsed, the operation stop signal is not output.

  That is, the abnormal operation stop mode 73 outputs an operation stop signal when the temperature sensor 6 detects a dangerous temperature and detects a dangerous temperature or more after a predetermined time has elapsed since the dangerous temperature is detected. If a temperature lower than the dangerous temperature is detected after a predetermined time has elapsed since the dangerous temperature was detected, the operation stop signal is not output.

That is, the temperature may rise to the dangerous temperature (70 ° C.) within the time (1 second) for calculating the temperature increase rate in the operation stop mode 72. In this case, since the operation stop mode 72 does not function and does not output an operation stop signal even if a dangerous temperature is reached, an operation stop signal is output from the operation stop mode 73 at the time of abnormality.
However, if the abnormal temperature operation stop mode 73 outputs an operation stop signal when the temperature sensor 6 detects the dangerous temperature for a time shorter than a predetermined time (for example, 0.5 seconds), the range hood stops unnecessarily. Therefore, the operation stop signal is not output when the temperature sensor 6 detects the dangerous temperature for a time shorter than the predetermined temperature.

For example, when the temperature detected by the temperature sensor 6 increases as indicated by C in FIG. 5, 70 ° C. within 0.5 seconds after detecting the first set temperature 58 ° C. in the first operation stop mode 72-1. Is detected.
Thereby, the first to fifth operation stop modes 72-1 to 72-5 do not function.
When the detected temperature of the temperature sensor 6 is 70 ° C. or higher for 5 seconds continuously, the abnormal operation stop mode 73 determines that a dangerous temperature at which cooking fire may have occurred has been reached, and outputs an operation stop signal. By doing so, the operation of the range hood is stopped.

Moreover, when the temperature detected by the temperature sensor 6 rises as indicated by D in FIG. 6, there is a possibility that the first and second operation stop modes 72-1 and 72-2 may cause a fire due to cooking. It is determined that the temperature does not rise, and the third operation stop mode 72-3 starts calculating the temperature rise, but the temperature sensor 6 detects 70 ° C. while the temperature rise rate is being calculated.
In this case, when the temperature sensor 6 detects 70 ° C. or higher even in 0.5 seconds, it is determined that the abnormal operation stop mode 73 has reached a dangerous temperature at which a fire due to cooking may have occurred, The operation of the range hood is stopped by outputting the operation stop signal.

  As a result, when a dangerous temperature that may have caused a fire due to cooking has been reached, the operation of the range hood is stopped, and it has not reached the dangerous temperature that may have caused a fire. The range hood does not stop in the event of an abnormality in which the temperature above the temperature is shorter than the predetermined time, so the range hood does not need to be stopped and the operation does not stop. Can be discharged.

In the operation return mode 74, the operation stop mode 72 outputs an operation stop signal, and after the operation of the range hood stops, the temperature sensor 6 detects the operation return set temperature and the specified time after the operation return set temperature is detected. An operation resumption signal is output when a temperature lower than the operation return set temperature is detected after the elapse of time.
When the operation restart signal is output, the range hood starts operation. For example, the motor 40 is energized to drive the blower 4 and start operation of the range hood. When the electric shutter is closed, it is opened. When power to the range hood is turned off, power is turned on.

The operation return set temperature is a temperature lower than the set temperature of the operation stop mode 72, for example, 50 ° C.
The specified time is 20 seconds.

An example of the operation in the operation return mode 74 will be described.
When the detected temperature of the temperature sensor 6 decreases as shown in E of FIG. 7, after the detected temperature of the temperature sensor 6 reaches 50 ° C., the detected temperature of 50 ° C. or less is detected 20 seconds after detecting the set temperature for return to operation. When the operation is resumed, the operation return mode 74 determines that the operation is resumed, and outputs an operation resumption signal.

Since it is like this, cooking can be restarted when the dangerous temperature at which a fire due to cooking may have occurred is removed.
In addition, since the operation restarts after detecting a temperature below 50 ° C after the specified time has elapsed after detecting the set temperature for return to operation, remove the range hood after removing the dangerous temperature where there is no malfunction and a fire may have occurred due to cooking. Operation can be resumed reliably.

The operation stop mode 72 of the control device 7 may be configured as follows.
That is, in the operation stop mode 72 described above, when the operation stop mode with the lower set temperature increases to the next higher set temperature while the temperature increase rate is being calculated, the operation stop mode with the next higher set temperature is performed. However, if the operation stop mode does not finish calculating the temperature increase rate, the operation stop mode with the next highest set temperature will not start calculating the temperature increase rate.

For example, when the temperature detected by the temperature sensor 6 increases as shown in F of FIG. 8, the temperature sensor 6 detects 58 ° C. and starts calculating the temperature increase rate of the first operation stop mode 72-1, and the calculation The temperature of the next operation stop mode rises after the end (after 1 second), but when the temperature increase part of the first operation stop mode 72-1 is finished (after 1 second), the temperature detected by the temperature sensor 6 is 62 ° C.
For this purpose, the temperature increase rate of the third operation stop mode 72-3 is calculated without calculating the temperature increase rate of the second operation stop mode 72-2.

  In the range hood of the embodiment, five patterns of the operation stop mode 72 are set.

  The abnormal operation stop mode 73 stops the operation of the range hood when the temperature sensor 6 detects a dangerous temperature and detects a dangerous temperature or more after a predetermined time has elapsed after detecting the dangerous temperature. 6 is configured to not stop the operation of the range hood when a temperature lower than the dangerous temperature is detected after a lapse of a predetermined time since the detection of the dangerous temperature. Stops the operation of the range hood when the dangerous temperature is detected for a predetermined time or more, and does not stop the operation of the range hood when the temperature sensor 6 detects the dangerous temperature for a time shorter than the predetermined time. It is good also as a structure.

  The abnormal operation stop mode 73 is a range when the temperature sensor 6 detects the dangerous temperature and continues to detect the temperature until a predetermined time elapses, and the average value of the detected temperature within the predetermined time is equal to or higher than the dangerous temperature. If the hood operation is stopped and the temperature sensor 6 detects the dangerous temperature and continues to detect the temperature until a predetermined time has elapsed, the average value of the detected temperature within the predetermined time is less than the dangerous temperature. It is good also as a structure which does not stop the driving | operation of hood.

The range hood of the embodiment is an indoor circulation type range hood, but it may be an outdoor discharge type range hood that discharges collected oil smoke and the like to the outside.
Moreover, although the range hood of embodiment is a type installed in a cooking table, the type of range hood installed in a ceiling may be sufficient.

  2 ... Hood, 3 ... Main body, 4 ... Blower, 5 ... Filter unit, 6 ... Temperature sensor, 7 ... Control device, 40 ... Motor, 41 ... Fan, 70 ... Controller, 72 ... Operation stop mode, 73 ... Abnormal operation Stop mode, 74 ... Operation return mode.

Claims (7)

A range hood that collects and discharges oily smoke generated by cooking by driving a blower,
A temperature sensor that detects the temperature of the collected oily smoke, and a control device that controls the operation of the range hood according to the temperature detected by the temperature sensor;
The control device has an operation stop mode that calculates a temperature increase rate from the time when the temperature detected by the temperature sensor reaches a set temperature, and stops the operation of the range hood when the temperature increase rate is equal to or higher than the set value. And
The range hood is characterized in that the set temperature is lower than a dangerous temperature at which the operation of the range hood is hindered. The range hood according to claim 1, wherein the control device has a plurality of operation stop modes having different set values of a set temperature and a temperature increase rate. The control device has a plurality of operation stop modes with different set values of the set temperature and the temperature increase rate,
The set value of the temperature rise rate in the shutdown mode with a low set temperature is larger than the set value of the temperature rise rate in the shutdown mode with a high set temperature, and the temperature rise rate is calculated in one shutdown mode with a low set temperature. 2. A configuration in which, when the temperature sensor detects a set temperature of another operation stop mode having the next highest set temperature in the middle, the calculation of the temperature increase rate is started in the other operation stop mode. Range hood. The control device has a plurality of operation stop modes with different set values of the set temperature and the temperature increase rate,
The set value of the temperature rise rate in the shutdown mode with a low set temperature is larger than the set value of the temperature rise rate in the shutdown mode with a high set temperature, and the calculation of the temperature rise rate is completed in one shutdown mode with a low set temperature The range hood according to claim 1, wherein the temperature rise rate is calculated in an operation stop mode at a set temperature corresponding to the temperature detected by the temperature sensor at the end. The control device has an abnormal operation stop mode,
In the abnormal operation stop mode, the operation of the range hood is stopped when the temperature sensor detects the dangerous temperature, and detects a dangerous temperature or more after a predetermined time has elapsed after detecting the dangerous temperature, and the temperature The range hood according to any one of claims 1 to 4, wherein the operation of the range hood is not stopped when a temperature less than the dangerous temperature is detected after a predetermined time has elapsed since the sensor detected the dangerous temperature. The control device has an operation return mode,
In the operation return mode, the temperature sensor detects the operation return set temperature after the range hood is stopped in the operation stop mode, and detects the temperature less than the operation return set temperature after a specified time has elapsed after detecting the operation return set temperature. In such a case, the operation of the range hood is resumed.
The range hood according to any one of claims 1 to 5, wherein the operation return set temperature is lower than a set temperature in the operation stop mode. The range hood is an indoor circulation type with a filter unit.
The dangerous temperature is a temperature at which a fire may have occurred,
The range hood according to any one of claims 1 to 6, wherein the operation stop of the range hood is any one or a combination of stop of a blower, closing of an electric shutter, and turning off energization of the range hood.

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