Air volume adjusting type range hood

Abstract

The invention relates to the technical field of kitchen appliances, and provides an air volume adjusting type range hood which comprises a shell, and an exhaust fan is connected with a variable frequency motor; the smoke sensing mechanism is provided with a detection assembly; comprising an emitter emitting light; the light intensity sensor detects a light signal and converts the light signal into an electric signal matched with the light intensity; the control unit is electrically connected with the variable frequency motor and the light intensity sensor; the controller receives an electric signal sent back by the light intensity sensor and sends a corresponding control signal to the variable frequency motor; and the air draft amount of the exhaust fan is matched with the oil smoke amount. Therefore, by arranging the smoke sensing mechanism, the oil smoke amount in the environment where the range hood is located is detected in real time, the oil smoke amount is converted into a controllable electric signal, the rotating speed of the exhaust fan is adjusted through the variable frequency motor, and then the air draft amount of the exhaust fan is matched with the oil smoke amount. The purpose of adjusting the air draft amount in real time according to the oil smoke amount is achieved. The adjusting process is automatically executed, the intelligent degree is high, use of a user is facilitated, and the experience feeling of the user is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen appliances, and in particular relates to an air volume regulating range hood. Background Art

[0002] At present, range hoods are usually set with two or three gears. When in use, the user manually controls the button to switch the gear according to the need for exhaust. It cannot automatically adjust according to the actual amount of oil smoke, which brings inconvenience to the user when the user is busy.

[0003] Moreover, the current air volume mode is bound to the gear position, with a large span, and it is impossible to appropriately adjust the exhaust volume according to the amount of oil smoke.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the present invention mainly provides an air volume regulating range hood to solve the technical problem that the air volume cannot be adjusted in real time according to the amount of oil smoke.

[0006] In order to solve the above problems, the present invention provides an air volume regulating range hood, comprising:

[0007] A housing, wherein an exhaust fan is provided in the housing for extracting smoke in the room; the exhaust fan is connected to a variable frequency motor;

[0008] A cover body, wherein the cover body has an exhaust duct for exhausting the sucked smoke to the outside;

[0009] The smoke sensing mechanism is arranged on the inner wall of the housing and has at least one set of detection components; the detection components include an emitter and a light intensity sensor arranged relatively to each other; the detection components are configured as follows: the emitter emits light; the light intensity sensor detects the light signal and converts it into an electrical signal adapted to the light intensity;

[0010] The control unit is electrically connected to the variable frequency motor and the light intensity sensor; the control unit is configured to: receive the electrical signal sent back by the light intensity sensor, and send a corresponding control signal to the variable frequency motor; the variable frequency motor adjusts the rotation speed of the exhaust fan to make the exhaust volume of the exhaust fan match the amount of oil smoke.

[0011] According to the air volume regulating range hood of the present invention, the smoke sensing mechanism includes a smoke collecting cylinder and a negative pressure cylinder which are coaxially sleeved; a negative pressure chamber is formed between the smoke collecting cylinder and the negative pressure cylinder; one end of the negative pressure chamber is a closed end, and the other end is an open end; an exhaust pipe connected to the negative pressure chamber is also fixedly connected to the outer wall of the negative pressure cylinder, and the exhaust pipe is also connected to the exhaust duct; the emitter and light intensity sensor of the detection component are provided on the inner wall of the smoke collecting cylinder.

[0012] According to the air volume regulating range hood of the present invention, the smoke collecting tube is arranged horizontally.

[0013] According to the air volume regulating range hood of the present invention, the number of the detection components in the smoke collecting tube is 3 groups, and the 3 groups of detection components are evenly arranged on the inner wall of the smoke collecting tube.

[0014] According to the air volume regulating range hood of the present invention, the exhaust pipe is connected to the outer wall of the negative pressure cylinder in a tangential manner.

[0015] According to the air volume regulating range hood of the present invention, spiral blades are provided on the outer wall of the smoke collecting tube or the inner wall of the negative pressure tube.

[0016] According to the air volume regulating range hood of the present invention, a plurality of air suction holes located below the side of the detection component are provided on the side wall of the shell.

[0017] According to the air volume regulating range hood of the present invention, the air suction holes are strip-shaped structures and are arranged horizontally.

[0018] According to the air volume regulating range hood of the present invention, an oil receiving box is provided below the shell.

[0019] According to the air volume regulating range hood of the present invention, a smoke guide plate is provided below the shell, and a display screen is also installed on the front.

[0020] In summary, the present invention detects the amount of oil smoke in the environment where the range hood is located in real time by setting a smoke sensing mechanism, and converts the amount of oil smoke into a controllable electrical signal, so that the variable frequency motor adjusts the speed of the exhaust fan, and then the exhaust volume of the exhaust fan is adapted to the amount of oil smoke. The purpose of adjusting the exhaust volume in real time according to the amount of oil smoke is achieved. The adjustment process is automatically executed, with a high degree of intelligence, which is convenient for users to use and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 is a schematic structural diagram of the smoke sensing mechanism of the present invention;

[0023] Figure 3 yes Figure 2 The structural diagram of the middle A direction;

[0024] In the figure: 1-hood, 2-shell, 3-oil receiving box, 4-display screen, 5-smoke guide plate, 6-intake hole, 7-smoke collecting tube, 71-emitter, 72-light intensity sensor, 73-support rod; 8-negative pressure tube, 81-exhaust pipe. DETAILED DESCRIPTION

[0025] See also Figure 1 The present invention provides an air volume regulating range hood, comprising:

[0026] A housing 2, wherein an exhaust fan is provided inside the housing 2 for extracting smoke in the room; the exhaust fan is connected to a variable frequency motor, and the rotation speed of the exhaust fan is precisely regulated by changing the frequency;

[0027] A cover body 1, wherein the cover body 1 has an exhaust duct therein, which is used to exhaust the sucked smoke to the outside;

[0028] See also Figure 2 , a smoke sensing mechanism is arranged on the inner wall of the shell 2, and has at least one set of detection components; the detection components include an emitter 71 and a light intensity sensor 72 arranged relatively to each other; the detection components are configured as follows: the emitter 71 emits light, and the tiny particles in the oil smoke scatter the light, thereby changing its propagation direction; the light intensity sensor 72 detects the light signal and converts it into an electrical signal adapted to the light intensity; by detecting the light intensity, the amount of oil smoke in the environment is judged.

[0029] The control unit is electrically connected to the variable frequency motor and the light intensity sensor 72; the control unit is configured to: receive the electrical signal sent back by the light intensity sensor 72, and send a corresponding control signal to the variable frequency motor; the variable frequency motor adjusts the rotation speed of the exhaust fan to make the exhaust volume of the exhaust fan match the amount of oil smoke.

[0030] Optionally, the emitter 71 of the present invention is a well-known light source, and the light intensity sensor 72 can be a well-known photosensor.

[0031] The present invention sets a smoke sensing mechanism to detect the amount of oil smoke in the environment where the range hood is located in real time, and converts the amount of oil smoke into a controllable electrical signal, so that the variable frequency motor adjusts the speed of the exhaust fan, and then the exhaust volume of the exhaust fan is adapted to the amount of oil smoke. The purpose of adjusting the exhaust volume in real time according to the amount of oil smoke is achieved. The adjustment process is automatically executed, with a high degree of intelligence, which is convenient for users to use and improves the user experience.

[0032] See also Figure 2 and Figure 3 As an embodiment, the smoke sensing mechanism of the present invention comprises a coaxially sleeved smoke collecting tube 7 and a negative pressure tube 8; a negative pressure cavity is formed between the smoke collecting tube 7 and the negative pressure tube 8; one end of the negative pressure cavity is a closed end, and the other end is an open end; an exhaust pipe 81 connected to the negative pressure cavity is also fixedly connected to the outer wall of the negative pressure tube 8, and the exhaust pipe 81 is also connected to the exhaust duct; the emitter 71 and the light intensity sensor 72 of the detection component are provided on the inner wall of the smoke collecting tube 7;

[0033] The exhaust fan is running, generating negative pressure in the exhaust duct, and then generating negative pressure in the negative pressure chamber through the exhaust pipe 81. Under the suction effect of the negative pressure, the gas is sucked from the open end of the negative pressure chamber; because the open end of the negative pressure chamber is surrounded by the outside of the smoke collecting tube 7, negative pressure is generated at the opening position of the smoke collecting tube 7, so that the oil smoke is sucked into the smoke collecting tube 7.

[0034] The detection component detects the oil smoke concentration in the smoke collecting tube 7 and sends an electrical signal to the control unit. The oil smoke is sucked in from one end of the smoke collecting tube 7 and then slowly flows to the other end for discharge, thus realizing continuous detection of the oil smoke amount. The exhaust volume can be adjusted in real time according to the change of the oil smoke amount.

[0035] The smoke collecting tube 7 of the present invention is arranged horizontally, which reduces the flow velocity of the oil smoke in the smoke collecting tube 7, so that the detection component and the control unit have enough reaction time to adjust the exhaust volume.

[0036] As a preferred solution, the number of detection components in the smoke collecting tube 7 is 3 groups, and the 3 groups of detection components are evenly arranged on the inner wall of the smoke collecting tube 7; multiple groups of data are detected simultaneously, making the detection structure more accurate and able to reflect the actual oil smoke concentration.

[0037] As an embodiment, the exhaust pipe 81 is connected to the outer wall of the negative pressure cylinder 8 in a tangential manner, so that a rotating airflow is generated in the negative pressure chamber, and then a larger negative pressure is generated at the open end of the negative pressure chamber, thereby increasing the amount of oil smoke sucked into the smoke collecting tube 7.

[0038] Furthermore, spiral blades are provided on the outer wall of the smoke collecting tube 7 or the inner wall of the negative pressure tube 8 to form a spiral airflow in the negative pressure chamber, further increasing the negative pressure value at the open end of the negative pressure chamber and improving the efficiency and amount of oil fume suction by the smoke collecting tube 7.

[0039] As an embodiment, the side wall of the housing 2 is provided with a plurality of air intake holes 6 located below the detection component; when the range hood is working, airflow is sucked in from the air intake holes 6, and then flows upward, forming a certain obstruction on the air outlet side of the smoke collecting tube 7, thereby prolonging the retention time of oil smoke in the smoke collecting tube 7. In this way, the detected oil smoke concentration value is slightly higher, the rotation speed of the exhaust fan is relatively large, the suction volume is increased, and the exhaust effect of oil smoke is guaranteed.

[0040] Furthermore, the air intake holes 6 are strip-shaped and are arranged horizontally; the air intake is linear and flows upward to form a planar coverage area, thereby effectively hindering the air outlet of the smoke collecting tube 7 .

[0041] Optionally, an oil receiving box 3 is provided below the shell 2 of the present invention to receive the waste oil condensed in the oil fume to prevent it from dripping.

[0042] Optionally, a smoke guide plate 5 is provided below the housing 2 of the present invention to guide the oil smoke into the exhaust duct.

[0043] Optionally, a display screen 4 is also installed on the front side of the housing 2 of the present invention.

[0044] In summary, the present invention provides an air volume regulating range hood, which detects the amount of oil smoke in the environment where the range hood is located in real time by setting a smoke sensing mechanism, and converts the amount of oil smoke into a controllable electrical signal, so that the variable frequency motor adjusts the speed of the exhaust fan, and then makes the exhaust volume of the exhaust fan match the amount of oil smoke. The purpose of adjusting the exhaust volume in real time according to the amount of oil smoke is achieved. The adjustment process is automatically executed, with a high degree of intelligence, which is convenient for users to use and improves the user experience.

[0045] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A range hood with air volume adjustment, characterized in that: include: A housing, wherein an exhaust fan is disposed in the housing and the exhaust fan is connected to a variable frequency motor; A cover body, wherein the cover body has an exhaust duct; The smoke sensing mechanism is arranged on the inner wall of the housing and has at least one set of detection components; the detection components include an emitter and a light intensity sensor arranged relatively to each other; the detection components are configured as follows: the emitter emits light; the light intensity sensor detects the light signal and converts it into an electrical signal adapted to the light intensity; A control unit is electrically connected to the variable frequency motor and the light intensity sensor; the control unit is configured to: receive the electrical signal sent back by the light intensity sensor, and send a corresponding control signal to the variable frequency motor; The variable frequency motor adjusts the speed of the exhaust fan so that the exhaust volume of the exhaust fan matches the amount of oil smoke.

2. The air volume regulating range hood according to claim 1, characterized in that: The smoke sensing mechanism includes a smoke collecting cylinder and a negative pressure cylinder which are coaxially sleeved; a negative pressure cavity is formed between the smoke collecting cylinder and the negative pressure cylinder; one end of the negative pressure cavity is a closed end, and the other end is an open end; an exhaust pipe connected to the negative pressure cavity is also fixedly connected to the outer wall of the negative pressure cylinder, and the exhaust pipe is also connected to the exhaust duct; the emitter and light intensity sensor of the detection component are provided on the inner wall of the smoke collecting cylinder.

3. The air volume regulating range hood according to claim 2, characterized in that: The smoke collecting tube is arranged horizontally.

4. The air volume regulating range hood according to claim 2, characterized in that: The number of detection components in the smoke collecting tube is 3 groups, and the 3 groups of detection components are evenly arranged on the inner wall of the smoke collecting tube.

5. The air volume regulating range hood according to claim 2, characterized in that: The air extraction pipe is connected to the outer wall of the negative pressure cylinder in a tangential manner.

6. The air volume regulating range hood according to claim 5, characterized in that: The outer wall of the smoke collecting tube or the inner wall of the negative pressure tube is provided with blades with a spiral direction.

7. The air volume regulating range hood according to claim 2, characterized in that: The side wall of the shell is provided with a plurality of air suction holes located below the side of the detection component.

8. The air volume regulating range hood according to claim 7, characterized in that: The air suction holes are strip-shaped and arranged horizontally.

9. The air volume regulating range hood according to any one of claims 1 to 8, characterized in that: An oil receiving box is arranged below the shell.

10. The air volume regulating range hood according to claim 9, characterized in that: A smoke guide plate is arranged below the shell, and a display screen is also arranged on the front.

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