Automatic speed regulating device for fan of range hood

Abstract

The utility model discloses a fan rotating speed automatic regulating device of range hood belongs to range hood technical field, including infrared smoke detection sensor, controller and fan rotating speed adjusting circuit, infrared smoke detection sensor sets up in the flue of range hood, and the signal output end of infrared smoke detection sensor is electrically connected with controller, and infrared smoke detection sensor is used for detecting the smoke concentration in the flue, and transmits to the controller, controller is electrically connected with fan rotating speed adjusting circuit, and fan rotating speed adjusting circuit is electrically connected with fan, and the controller sends control command according to the smoke concentration in the flue, and fan rotating speed adjusting circuit adjusts the rotating speed of fan according to the control command of controller. Through detecting the smoke concentration of the volute smoke entrance position of range hood, realize the adjustment of fan rotating speed, make range hood operation more intelligent, and the user experience is good.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and more specifically, to an automatic fan speed adjustment device for a range hood. Background Technology

[0002] Current household range hoods typically have two fan speed settings, usually switched manually via buttons. Users often only switch speeds after smelling cooking fumes, and given the complexity of kitchen tasks, users often lack the time to adjust the speed promptly or forget to do so. This lack of intelligence results in a poor user experience with the range hood.

[0003] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic fan speed adjustment device for a range hood, aiming to solve at least one of the technical problems existing in the prior art. To achieve the above objective, the technical solution adopted is as follows: The automatic fan speed adjustment device for a range hood includes an infrared smoke detection sensor, a controller, and a fan speed adjustment circuit; An infrared smoke detection sensor is installed inside the flue of the range hood. The signal output terminal of the infrared smoke detection sensor is electrically connected to the controller. The infrared smoke detection sensor is used to detect the smoke concentration inside the flue and transmit it to the controller. The controller is electrically connected to the fan speed regulation circuit, and the fan speed regulation circuit is electrically connected to the fan. The controller issues control commands based on the smoke concentration in the flue, and the fan speed regulation circuit adjusts the fan speed according to the controller's control commands.

[0005] Preferably, the controller has a first smoke concentration threshold and a second smoke concentration threshold preset, and the first smoke concentration threshold is less than the second smoke concentration threshold; When the smoke concentration in the flue is less than the first smoke concentration threshold, the fan runs at low speed. When the smoke concentration in the flue is greater than or equal to the first smoke concentration threshold and less than or equal to the second smoke concentration threshold, the fan operates at medium speed. When the smoke concentration in the flue exceeds the second smoke concentration threshold, the fan runs at high speed.

[0006] Preferably, the front panel of the range hood is equipped with a three-color indicator light, which is electrically connected to the controller. The three display colors of the three-color indicator light correspond one-to-one with the low, medium and high speed of the fan.

[0007] Preferably, the front panel of the range hood is provided with an on / off switch for turning the range hood on and off.

[0008] Preferably, the front panel of the range hood is provided with a mode adjustment key for switching between manual and automatic adjustment modes of the range hood's fan speed.

[0009] Preferably, the front panel of the range hood is provided with multiple speed control buttons for adjusting the fan speed in manual fan speed adjustment mode.

[0010] Preferably, the infrared smoke detection sensor is installed at the smoke inlet of the range hood's volute.

[0011] Preferably, the infrared smoke detection sensor is a reflective or through-beam type.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The automatic fan speed adjustment device of this utility model for range hoods adjusts the fan speed by detecting the smoke concentration at the smoke inlet of the range hood's volute, making the range hood operate more intelligently and providing a better user experience. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a range hood using the device of this utility model.

[0015] In the picture: 1. Infrared smoke detection sensor; 2. Three-color indicator light. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1As shown, a preferred embodiment of this utility model provides an automatic fan speed adjustment device for a range hood. The device includes an infrared smoke detection sensor 1, a controller, a fan speed adjustment circuit, and a three-color indicator light 2.

[0019] Infrared smoke detection sensor 1 is installed inside the flue of the range hood, specifically at the smoke inlet of the range hood's volute via a bracket. This location is less affected by external flue gas pressure. The signal output terminal of infrared smoke detection sensor 1 is electrically connected to the controller. Infrared smoke detection sensor 1 is used to detect the smoke concentration inside the flue and transmit it to the controller as an electrical signal.

[0020] Among them, the infrared smoke detection sensor 1 is either a reflective or a through-beam type. In this embodiment, the reflective type is preferred. The specific detection principle is that when there is smoke, the smoke will affect the reflection of infrared rays. The greater the smoke concentration, the lower the intensity of the reflected infrared rays, and thus the smoke concentration can be inferred.

[0021] The controller is specifically the main control board of the range hood. The controller has a first smoke concentration threshold and a second smoke concentration threshold preset in it, and the first smoke concentration threshold is less than the second smoke concentration threshold.

[0022] The controller is electrically connected to the fan speed regulation circuit, and the fan speed regulation circuit is electrically connected to the fan. The controller issues control commands based on the smoke concentration in the flue, and the fan speed regulation circuit adjusts the fan speed according to the controller's control commands.

[0023] When the smoke concentration detected by the infrared smoke detection sensor 1 is less than the first smoke concentration threshold, the controller issues a corresponding control command, and the fan speed regulation circuit adjusts the fan to run at low speed according to the controller's control command.

[0024] When the smoke concentration detected by the infrared smoke detection sensor 1 is greater than or equal to the first smoke concentration threshold and less than or equal to the second smoke concentration threshold, the controller issues a corresponding control command, and the fan speed regulation circuit adjusts the fan to run at medium speed according to the controller's control command.

[0025] When the smoke concentration detected by infrared smoke detection sensor 1 is greater than the second smoke concentration threshold, the controller issues a corresponding control command, and the fan speed regulation circuit adjusts the fan to run at high speed according to the controller's control command.

[0026] The three-color indicator light 2 is installed on the front panel of the range hood. The three-color indicator light 2 is electrically connected to the controller, which can control the three-color indicator light to display green, purple and red.

[0027] When the fan is running at low speed, the controller controls the tri-color indicator light 2 to display green; when the fan is running at medium speed, the controller controls the tri-color indicator light 2 to display purple; when the fan is running at high speed, the controller controls the tri-color indicator light 2 to display red.

[0028] Furthermore, the front panel of the range hood is equipped with a switch for turning the range hood on and off.

[0029] Furthermore, the front panel of the range hood is equipped with a mode adjustment button for switching between manual and automatic adjustment modes of the range hood's fan speed.

[0030] Furthermore, the front panel of the range hood is equipped with multiple speed control buttons for adjusting the fan speed in manual fan speed adjustment mode.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic fan speed adjustment device for a range hood, characterized in that, Includes an infrared smoke detection sensor, a controller, and a fan speed regulation circuit; An infrared smoke detection sensor is installed inside the flue of the range hood. The signal output terminal of the infrared smoke detection sensor is electrically connected to the controller. The infrared smoke detection sensor is used to detect the smoke concentration inside the flue and transmit it to the controller. The controller is electrically connected to the fan speed regulation circuit, and the fan speed regulation circuit is electrically connected to the fan. The controller issues control commands based on the smoke concentration in the flue, and the fan speed regulation circuit adjusts the fan speed according to the controller's control commands.

2. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The controller has a first smoke concentration threshold and a second smoke concentration threshold preset in it, and the first smoke concentration threshold is less than the second smoke concentration threshold. When the smoke concentration in the flue is less than the first smoke concentration threshold, the fan runs at low speed. When the smoke concentration in the flue is greater than or equal to the first smoke concentration threshold and less than or equal to the second smoke concentration threshold, the fan operates at medium speed. When the smoke concentration in the flue exceeds the second smoke concentration threshold, the fan runs at high speed.

3. The automatic fan speed adjustment device for a range hood according to claim 2, characterized in that, The front panel of the range hood is equipped with a three-color indicator light, which is electrically connected to the controller. The three display colors of the indicator light correspond one-to-one with the low, medium and high speed of the fan.

4. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The front panel of the range hood is equipped with a switch for turning the range hood on and off.

5. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The front panel of the range hood is equipped with a mode adjustment button for switching between manual and automatic adjustment modes of the range hood's fan speed.

6. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The front panel of the range hood is equipped with multiple speed control buttons for adjusting the fan speed in manual fan speed adjustment mode.

7. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The infrared smoke detection sensor is installed at the smoke inlet of the range hood's volute.

8. The automatic fan speed adjustment device for a range hood according to claim 1, characterized in that, The infrared smoke detection sensor is either a reflective or a through-beam type.

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