TWM519223U - Automatically activation/deactivation kitchen hood - Google Patents

Description

Range hood that can be automatically opened and closed

This creation is related to the hood, especially a hood that can be automatically opened and closed.

The average housewife will decide whether to start the hood according to the degree of soot and high temperature during cooking, and often try to save the electricity bill, so try not to use the hood when cooking, but the result is not only easy. Causes the room to be full of fumes, and it also causes a certain degree of damage to the family's respiratory system.

In order to solve the above problems, some of the fume removal opportunities in the market have been forcibly activated by different sensing mechanisms. For example, the Republic of China Announcement No. M356080 patent is mainly sensed by the temperature sensing element disposed in the casing. The temperature change is transmitted to the control circuit board of the control mechanism for calculation. When the temperature sensing element senses the temperature of the surrounding gas or the conduction temperature of the housing group is higher than a predetermined temperature value, the control mechanism directly activates the motor to cause the motor to drive the wind. The stomach performs the smoke exhausting action, but in this conventional patent case, the temperature sensing element is easily affected by the climate change, causing sensitivity problems and malfunctions, such as a higher average temperature in summer, which causes the temperature sensing element to sense The temperature change is easily higher than the predetermined temperature value, causing the motor to start faster, while the average temperature in winter is lower, and the temperature change induced by the temperature sensing element is relatively less likely to be higher than the predetermined temperature value. , so the motor will start slower, which will cause use in actual use. Trouble and inconvenience.

In addition, in the Republic of China Announcement No. 408809, the first and second detecting members are disposed in the casing, and the first and second detecting members are mainly used for respectively detecting the surface temperature of the top plate and the surface temperature of the bottom plate, and then Calculating the temperature difference between the two through the arithmetic circuit, and controlling the starting, closing or shifting of the motor according to the change of the temperature difference within a certain time. However, since the first and second detecting members are located in the same space, The temperature difference detected by the two is not obvious, so it is easy for the arithmetic circuit to produce a judgment error and affect the subsequent control result of the motor.

The main purpose of this creation is to provide a range hood that has good sensing sensitivity without the occurrence of malfunctions to accurately control the fan for smoke exhausting.

In order to achieve the above object, the hood of the present invention comprises a casing, a fan, a temperature sensing unit, and a control unit. The casing has a row of smoke passages, the exhaust passage has an inlet and an outlet; the fan is disposed in the casing and has a fan and a motor connected to the fan; the temperature sensing unit has a first temperature a sensor, a second temperature sensor, and a third temperature sensor, the first temperature sensor is disposed on a bottom surface of the casing for sensing a temperature of the fire and transmitting a first temperature a second temperature sensor is disposed in the casing and adjacent to the outlet of the exhaust passage for sensing a temperature near the outlet of the exhaust passage to send a second temperature sensing signal. The third temperature sensor is disposed on a top surface of the casing to sense a temperature of the indoor environment and send a third temperature sensing signal; the control unit is coupled to the motor of the fan and the temperature sensing unit, The first, second, and third temperature sensing signals are received.

Thereby, the control unit can respectively calculate a first temperature value, a second temperature value and a third temperature value according to the first, second and third temperature sensing signals, and the first and the first The temperature difference between the second and third temperature values further controls the opening and closing of the motor or adjusts the rotation speed of the motor, so that the effect of improving the sensing sensitivity can be achieved.

The detailed construction, features, assembly or use of the range hood provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

Please refer to Figures 1 and 3 first. The hood 10 of the present invention comprises a casing 20, a fan 30, a temperature sensing unit 40, and a control unit 50.

The casing 20 is fixed to the wall and has a row of smoke passages 22 having an inlet 24 and an outlet 26.

The fan 30 is disposed in the casing 20 and has a fan 32 and a motor 34 connected to the fan 32, so that the fan 32 can be rotated by the driving of the motor 34 for exhausting smoke into the exhaust passage 22. .

The temperature sensing unit 40 has a first temperature sensor 41 , a second temperature sensor 42 , and a third temperature sensor 43 . The first temperature sensor 41 is disposed on the bottom surface of the casing 20 for sensing the temperature of the fire to send a first temperature sensing signal, and the second temperature sensor 42 is disposed in the casing 20 adjacent to the row. An outlet of the smoke passage 22 is configured to sense a temperature near the outlet 26 of the exhaust passage 22 and send a second temperature sensing signal. The third temperature sensor 43 is disposed on the top surface of the casing 20 for sensing. A third temperature sensing signal is sent at the temperature of the indoor environment.

The control unit 50 is coupled to the motor 34 of the fan 30 and the temperature sensing unit 40 for receiving the first temperature sensing signal of the first temperature sensor 41 and the second temperature sensing signal of the second temperature sensor 42 and The third temperature sensing signal of the third temperature sensor 43 enables the control unit 50 to calculate a first temperature value, a second temperature value, and a first according to the first, second, and third temperature sensing signals. The third temperature value is further controlled by the temperature difference between the first, second, and third temperature values (eg, on, off, or rotational speed). Since the first temperature sensor 41 is directly disposed on the bottom surface of the casing 20, there is no barrier between the gas and the gas stove, so when the fire is opened, the temperature of the reaction furnace can be sensed immediately, and the temperature can be minimized. The time sends the sensed first temperature sensing signal to the control unit 50, such an arrangement can obtain an optimum response.

In actual operation, as shown in FIGS. 2 and 4, when the fan 30 is to be activated when the gas furnace 11 is in an unfired state, since the first temperature sensor 41 does not sense the furnace temperature, the fan 30 The motor 34 is not forced to start. At this time, the user needs to manually press a power switch 16 to activate the motor 34 of the fan 30 and press a light switch 18 to turn on the light 12, after pressing the power switch 16 The user can press the wind speed adjustment switch 17 to control the motor 34 of the fan 30 to perform the first operation (ie, low speed operation), the second operation (ie, medium speed operation), or the third operation (ie, high speed operation). When the wind speed adjustment switch 17 is pressed, the control unit 50 respectively opens a first section of the wind speed indicator lamp 13, a second section of the wind speed indicator lamp 14 and a third section of the wind speed indicator lamp according to the rotation speed of the motor 34. 15. Finally, the motor 34 of the blower 30 can be stopped by pressing the power switch 16 again, and the illumination lamp 12 and the various wind speed display lamps 13, 14, 15 are turned off at the same time.

It should be noted that, in addition to the hood 10 that has been electrically connected and has not been manually or automatically operated, the indicator light of the power switch 16 will always be in an OFF state (generally displayed in a red light), and once removed When the hood 10 enters manual or automatic operation, the indicator light of the power switch 16 is changed to the ON state (generally displayed by a green light).

As shown in FIG. 5, when the user turns on the gas furnace 11 when the fan 30 is not activated, the first temperature sensor 41 senses the temperature of the furnace and sends the first temperature sensing signal to the control unit. 50. At this time, the control unit 50 determines whether to start the motor 34 according to the temperature change between the first and third temperature sensors 41, 43. When the first temperature value calculated by the control unit 50 is subtracted from the third value. When the temperature value is greater than a first preset value (here preset to 5 ° C), the control unit 50 controls the motor 34 to perform the first operation (ie, low speed operation), so that the fan 32 starts the smoke exhausting operation and simultaneously turns on. The illuminator 12 and the first stage wind speed indicator lamp 13. After the motor 34 is operated for a period of time in the first stage, the control unit 50 determines whether to control the motor 34 to accelerate according to the temperature change between the second and third temperature sensors 42, 43 when the control unit 50 When the calculated second temperature value minus the third temperature value is greater than a second preset value (here preset to be 10 ° C), the control unit 50 controls the motor 34 to switch to the second stage of operation (ie, medium speed operation). At the same time, the first segment of the wind speed indicator lamp 13 is turned off and the second segment of the wind speed indicator lamp 14 is turned on, once the second temperature value calculated by the control unit 50 is subtracted from the third temperature value by more than a third preset value (preset here) When it is 20 ° C), the control unit 50 controls the motor 34 to switch to the third-stage operation (ie, high-speed operation) while turning off the second-stage wind speed indicator lamp 14 and turning on the third-stage wind speed indicator lamp 15.

On the other hand, when the second temperature value calculated by the control unit 50 minus the third temperature value is less than the third preset value (here preset to 20 ° C), it indicates that the fire starts to gradually become smaller. The control unit 50 controls the motor 34 to switch from the third stage operation to the second stage operation, while the third stage wind speed indicator lamp 15 is turned off and the second stage wind speed indicator lamp 14 is turned on, in the process of the furnace being continuously reduced, 2. The temperature difference between the third temperature values will also gradually decrease until the second temperature value minus the third temperature value is less than the second preset value (here preset to 10 ° C), the control unit 50 controls the motor 34. Switching from the second stage operation to the first stage operation, simultaneously closing the second stage wind speed indicator lamp 14 and turning on the first stage wind speed indicator lamp 13, and then after the gas furnace 11 is turned off, the first temperature sensor 41 senses The first temperature value gradually decreases, and the temperature value sensed by the second temperature sensor 42 also gradually decreases. When the second temperature value is equal to the third temperature value, or the first temperature value is equal to the third temperature value, the control is performed. Unit 50 will control the motor 34 to stop running while turning off the light 12 and Some wind speed indicator lamp 13, 14, so that is returns to the original state.

It should be additionally noted that if the wind speed adjustment switch 17 is pressed by hand in the automatic mode, the entire system will switch to the manual mode, and the user can only control the motor 34 by pressing the wind speed adjustment switch 17 . Speed, control unit 50 is not The speed of the motor 34 is automatically switched until the entire system is turned off and then restarted to enter the automatic mode again.

In addition, this creation is applicable not only to the general traditional range hood, but also to the European-style range hood, which is commonly known as the Nakajima type. It can also achieve the effects of automatic opening and closing and shifting.

In summary, the hood 1 () of the present invention senses temperature changes at different positions by temperature sensors 41, 42, 43 at three different positions, and further controls according to the temperature difference between the three. The operation of the motor 34, compared with the conventional technology, the hood 10 of the present invention does have better sensing sensitivity, is not easily interfered by the human body, sunlight or other external environmental factors, and effectively avoids malfunction. the goal of.

10‧‧‧Exhaust hood

11‧‧‧ Gas stove

12‧‧‧Lights

13‧‧‧The first stage of the wind speed indicator

14‧‧‧Second section wind speed indicator light

15‧‧‧third stage wind speed indicator light

16‧‧‧Power switch

17‧‧‧Wind speed adjustment switch

18‧‧‧Lighting switch

20‧‧‧Chassis

22‧‧‧Exhaust passage

24‧‧‧ entrance

26‧‧‧Export

30‧‧‧Fan

32‧‧‧fan

34‧‧‧Motor

40‧‧‧Temperature sensing unit

41‧‧‧First temperature sensor

42‧‧‧Second temperature sensor

43‧‧‧ Third temperature sensor

50‧‧‧Control unit

The first picture is a schematic diagram of the structure of the creation. Figure 2 is a schematic diagram of the operation panel of the present creation. Figure 3 is a block diagram of the creation. Figure 4 is a flow chart of the author in manual mode. Figure 5 is a flow chart of the creation in the automatic mode.

12‧‧‧Lights

13‧‧‧The first stage of the wind speed indicator

14‧‧‧Second section wind speed indicator light

15‧‧‧third stage wind speed indicator light

16‧‧‧Power switch

17‧‧‧Wind speed adjustment switch

18‧‧‧Lighting switch

30‧‧‧Fan

32‧‧‧fan

34‧‧‧Motor

40‧‧‧Temperature sensing unit

41‧‧‧First temperature sensor

42‧‧‧Second temperature sensor

43‧‧‧ Third temperature sensor

50‧‧‧Control unit

Claims (8)

The utility model relates to a range hood which can be automatically opened and closed, comprising: a casing having a row of smoke passages, the exhaust passage having an inlet and an outlet; a fan disposed in the casing and having a fan and a connection a motor of the fan; a temperature sensing unit having a first temperature sensor, a second temperature sensor, and a third temperature sensor, the first temperature sensor being disposed in the casing The bottom surface is configured to send a first temperature sensing signal, and the second temperature sensor is disposed in the casing and adjacent to the outlet of the exhaust passage for transmitting a second temperature sensing signal, the third a temperature sensor is disposed on the top surface of the casing for transmitting a third temperature sensing signal; and a control unit coupled to the motor of the fan and the temperature sensing unit for receiving the first and the first The second and third temperature sensing signals enable the control unit to calculate a first temperature value, a second temperature value, and a third temperature value according to the first, second, and third temperature sensing signals, respectively. And controlled by the temperature difference between the first, second, and third temperature values The motor is turned on or off or the speed of the motor is adjusted. The range hood that can be automatically opened and closed according to claim 1, wherein the control unit controls the motor to perform the first operation when the first temperature value minus the third temperature value is greater than a first preset value . The range hood that can be automatically opened and closed according to claim 2, wherein the control unit controls the motor to perform the second when the second temperature value minus the third temperature value is greater than or equal to a second preset value In the segment operation, the rotation speed of the motor in the second stage is higher than the rotation speed in the first stage. The range hood that can be automatically opened and closed according to claim 3, wherein the control unit controls the motor to perform the third operation when the second temperature value minus the third temperature value is greater than a third preset value The motor runs at a higher speed in the third stage than in the second stage. The range hood that can be automatically opened and closed according to claim 4, wherein the control unit controls the motor to perform the second operation when the second temperature value minus the third temperature value is less than the third preset value . The range hood that can be automatically opened and closed according to claim 5, wherein the control unit controls the motor to perform the first operation when the second temperature value minus the third temperature value is less than the second preset value . The range hood that can be automatically opened and closed according to any one of claims 1 to 6, wherein when the second temperature value is equal to the third temperature value, or the first temperature value is equal to the third temperature value, The control unit controls the motor to stop operating. The range hood that can be automatically opened and closed according to claim 1, wherein the motor of the fan is coupled to a wind speed adjustment switch, and when the wind speed adjustment switch is activated when the control unit is in an automatic mode, the control unit The automatic control of the motor is released and switched to a manual mode, so that the wind speed adjustment switch can switch the rotational speed of the motor by manual operation.