Filter screen accumulated dust detection system and electric hair dryer

Abstract

The utility model provides a filter screen accumulated dust detection system and an electric hair dryer, and the filter screen accumulated dust detection system comprises a temperature detector which is arranged in the electric hair dryer and is used for detecting the air outlet temperature of the electric hair dryer; the controller is connected with the temperature detector and used for receiving the temperature value detected by the temperature detector; the motor is connected with the controller and used for responding to control of the controller, and when the temperature value is within a first range, the operation rotating speed is increased; the motor driving board is connected with the motor and is used for detecting the running current value of the motor; and the light assembly is connected with the motor driving plate and used for outputting a light prompt representing that filter screen dust removal needs to be carried out when it is known that the current value is within the second range. The filter screen accumulated dust detection system disclosed by the utility model can quickly and effectively realize filter screen accumulated dust detection.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, and in particular to a filter dust accumulation detection system and a hair dryer. Background Art

[0002] Currently, most of the high-speed hair dryers on the market that have automatic air filter cleaning functions rely on visual inspection to determine whether the air filter is blocked by debris and hair. Since there is no automatic reminder function, the product seems to be not user-friendly enough;

[0003] In addition, it is extremely unreasonable to judge whether the air inlet filter is blocked by debris and hair only by visual inspection. Because everyone has different judgment standards, it leads to a very poor user experience of the product.

[0004] Another solution is to set a timing chip in the circuit to set an upper limit for the cumulative working time. When the cumulative working time reaches this upper limit, the user is reminded to clean the air inlet filter. This solution is not accurate because the time for the air inlet filter to be blocked by debris and hair is different in different usage environments;

[0005] Another solution is to set a counting chip in the circuit to set an upper limit for the cumulative number of startups. When the cumulative number of startups reaches this upper limit, the user is reminded to clean the air inlet filter. This solution is also unscientific because the air inlet filter is blocked by debris and hair for different periods of time in different usage environments.

[0006] Another solution is to add a temperature monitoring circuit to the electronic control part of the whole machine. When the resistance value of the self-heating element changes and the temperature becomes abnormal, the user is reminded to clean the air inlet filter. This solution is also unscientific, because when the self-heating element of the product fails, the temperature will also be abnormal. It is not necessarily that the air inlet filter is blocked by debris and hair, which is easy to be misjudged;

[0007] The solution for automatically cleaning the air inlet filter usually uses the standby mode operation button to make the motor reverse. In fact, debris and hair are often adsorbed due to static electricity. Simply using the motor reversal for cleaning has very limited effect and cannot achieve the purpose of thorough cleaning. Utility Model Content

[0008] The utility model provides a filter screen dust accumulation detection system and a hair dryer which can quickly and effectively realize the filter screen dust accumulation detection.

[0009] In order to solve the above technical problems, the embodiment of the utility model provides a filter dust detection system, which is arranged in a hair dryer, and is characterized in that the filter dust detection system comprises:

[0010] A temperature detector, arranged in the hair dryer, for detecting the outlet air temperature of the hair dryer;

[0011] A controller, connected to the temperature detector, and configured to receive a temperature value detected by the temperature detector;

[0012] a motor connected to the controller, and configured to increase a running speed in response to control of the controller when the temperature value is within a first range;

[0013] A motor drive board, connected to the motor, and used to detect the running current value of the motor;

[0014] The lighting component is connected to the motor drive board and is used to output a lighting prompt indicating that filter dust removal is required when it is known that the current value is within the second range.

[0015] As an optional embodiment, the temperature detector is arranged between the heating component and the air outlet of the hair dryer.

[0016] As an optional embodiment, the lighting assembly includes a light board and a flash light, and the light board is connected to a motor driving board so as to control the flash light to output a light prompt when it is known that the current value is within the second range.

[0017] As an optional embodiment, the temperature detector is an NTC.

[0018] Another embodiment of the utility model also provides a hair dryer, including a housing, and a filter dust accumulation detection system as described above and arranged in the housing.

[0019] As an optional embodiment, the housing includes an upper housing and a lower housing that are connected to each other, the upper housing and the lower housing include two opposite ends, a first end forms an air outlet, and the other end forms an air inlet, and a back cover covered with air inlet holes is provided on the air inlet.

[0020] When the operating current of the motor is within the second range, it indicates that the rear cover needs dust removal.

[0021] As an optional embodiment, the hair dryer further comprises an air inlet filter assembly located in the housing and between the rear cover and the motor;

[0022] When the operating current of the motor is within the second range, it indicates that the air inlet filter assembly needs dust removal.

[0023] As an optional embodiment, the hair dryer has a control switch for controlling the operation of the hair dryer;

[0024] The hair dryer also has a wind temperature adjustment switch, which is connected to the motor and the controller, and is used to control the controller to start the motor reverse in response to the user's operation on the wind temperature adjustment switch, thereby realizing the dust removal operation of the rear cover and the air inlet filter assembly.

[0025] As an optional embodiment, the hair dryer also includes a negative ion generator connected to the motor for assisting dust removal.

[0026] As an optional embodiment, the motor housing has a silicone sleeve for vibration reduction.

[0027] Based on the disclosure of the above embodiments, it can be known that the beneficial effects of the embodiments of the utility model include that when the controller monitors that the working current of the motor exceeds the normal range, it indicates that the outermost rear cover (or air inlet filter assembly) of the hair dryer is blocked by debris and hair. At this time, the controller will promptly notify the light assembly to emit a light prompt to remind the user to clean up the dust in time. The detection system based on this embodiment can effectively avoid the drawbacks of solutions such as timing, counting and temperature monitoring, and realize effective detection and timely removal of dust accumulation, which not only improves accuracy and enhances the experience, but also greatly extends the service life of the product.

[0028] In addition, in terms of using the motor reversal to clean the dust on the surface of the rear cover (or the air inlet filter assembly), a negative ion generator is provided to increase the negative ion flow, which is used to neutralize electrons during the cleaning process and solve the adsorption problem caused by static electricity. The hair dryer of this embodiment can effectively avoid the disadvantages of the solution of simply using the motor reversal to achieve cleaning, effectively achieve dust removal and static electricity elimination, not only improve the cleaning efficiency and enhance the experience, but also effectively improve the performance and service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the filter dust accumulation detection system according to an embodiment of the present utility model.

[0030] Figure 2 This is a structural diagram of a hair dryer according to an embodiment of the utility model.

[0031] Figure 3 This is a structural exploded view of the hair dryer according to an embodiment of the utility model.

[0032] Figure 4 This is a connection diagram of some components in the hair dryer according to an embodiment of the utility model.

[0033] Reference numerals:

[0034] 1-temperature detector; 2-motor; 3-housing; 4-heating component; 5-rear cover; 6-air inlet filter assembly; 7-air temperature adjustment switch; 8-control switch; 9-handle assembly; 10-light board DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the present invention.

[0036] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0038] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0039] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present invention that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0040] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0041] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0042] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0043] Below, the embodiments of the utility model are described in detail with reference to the accompanying drawings.

[0044] like Figure 1 As shown, the embodiment of the utility model provides a filter dust detection system, which is arranged in a hair dryer, and the filter dust detection system includes:

[0045] A temperature detector 1, arranged in the hair dryer, for detecting the air outlet temperature of the hair dryer;

[0046] A controller, connected to the temperature detector 1, and configured to receive a temperature value detected by the temperature detector 1;

[0047] A motor 2 connected to the controller, for increasing the operating speed in response to the control of the controller when the temperature value is within the first range;

[0048] A motor 2 driving board, connected to the motor 2 and used to detect the running current value of the motor 2;

[0049] The lighting component is connected to the motor 2 driving board, and is used to output a lighting prompt indicating that filter dust removal is required when it is known that the current value is within the second range.

[0050] The motor 2 is a high-speed motor 2, which can be an existing device in the hair dryer. The temperature detector 1 in this embodiment is arranged between the heating component 4 and the air outlet of the hair dryer. The temperature detector 1 can be, but is not limited to, an NTC.

[0051] Furthermore, the lighting assembly includes a light board 10 and a flash light, and the light board 10 is connected to a driving board of the motor 2 so as to control the flash light to output a light prompt when it is known that the current value is within the second range.

[0052] When in use, when the user plugs the power cord of the hair dryer into the wall socket, the hair dryer is started to work, and the appropriate wind speed and wind temperature gear can be adjusted to put the hair dryer into normal use. However, after a certain period of use (or 3 months, or half a year, mainly depending on the use environment and the cumulative working time), the outermost back cover 5 or the air inlet filter assembly 6 of the hair dryer is easily blocked by 50% or more of the debris and hair that are easily adsorbed. At this time, it will close the air inlet of the hair dryer, so that the air intake of the air inlet is greatly reduced. Due to the reduction in the air intake volume, the heat generated by the heating component 4 is accumulated inside the housing 3, and the temperature of the air outlet drops sharply. When the temperature detector 1NTC7.1 installed at the front end of the heating component 4 detects the drop in the air outlet temperature, the detected temperature data will be fed back to the MCU of the controller. Since the high-speed hair dryer has a constant temperature function, when the controller MCU learns that the temperature has dropped, it will issue a command and be forced to increase the speed of the high-speed motor 2 to accelerate the removal of heat, thereby achieving the effect of increasing the air outlet temperature. When the speed of motor 2 increases, the working current of motor 2 will be increased directly, exceeding the normal current value (such as the normal current value of motor 2 with diameter Ф29 is 0.55A). At this time, the IC on the motor 2 driver board will default to the air inlet filter assembly 6 or the rear cover 5 being covered by dust through the increase of current value, that is, dust accumulation detection is realized. In order to remove dust in time, the motor 2 driver board will send a flashing reminder to the light board in the light assembly, so that the light board controls the flash light to output light prompts, such as all flash lights / indicator lights flashing at a frequency of 2Hz. The user can know the need for dust removal operation through the light prompt, and implement the operation in time to ensure the subsequent normal operation of the hair dryer.

[0053] Based on the disclosure of the above embodiments, it can be known that the beneficial effects of this embodiment include that when the controller monitors that the working current of the motor 2 exceeds the normal range, it indicates that the outermost rear cover 5 (or the air inlet filter assembly 6) of the hair dryer is blocked by debris and hair. At this time, the controller will promptly notify the lighting assembly to emit a light prompt to remind the user to clean up the dust in time. The detection system based on this embodiment can effectively avoid the drawbacks of solutions such as timing, counting and temperature monitoring, and realize effective detection and timely removal of dust accumulation, which not only improves accuracy and enhances the experience, but also greatly extends the service life of the product.

[0054] like Figure 2 As shown, another embodiment of the present invention also provides a hair dryer, including a shell 3, and a filter dust accumulation detection system as described in any of the embodiments above and arranged in the shell 3.

[0055] like Figure 3 and Figure 4As shown, the housing 3 includes an upper housing and a lower housing that are connected to each other. After the upper housing and the lower housing are connected to each other, a housing 3 with a receiving chamber is formed. The housing 3 includes two opposite ends, the first end forms an air outlet, and the second end forms an air inlet. The air inlet is provided with a back cover 5 covered with air inlet holes. The motor 2 in the hair dryer is arranged in the above-mentioned receiving chamber and is adjacent to the air inlet.

[0056] The hair dryer further includes an air inlet filter assembly 6 located in the housing 3 and between the rear cover 5 and the motor 2, and a heating assembly is provided between the motor 2 and the air outlet, the heating assembly is composed of a heater, a thermostat, a temperature fuse and other components, and is used to heat the air entering the housing 3. The airflow inhaled by the operation of the motor 2 enters the housing 3 from the rear cover 5, is filtered by the air inlet filter assembly 6, and is sent out from the air outlet after being heated by the heating assembly.

[0057] When the outermost back cover 5 or air inlet filter assembly 6 of the hair dryer is blocked by 50% or more of the easily adsorbed debris and hair, it will close the air inlet of the hair dryer, greatly reducing the air volume at the air inlet. Due to the reduction in air volume, the heat generated by the heating component 4 is accumulated inside the housing 3, and the temperature of the air outlet drops sharply. When the temperature detector 1NTC7.1 installed at the front end of the heating component 4 detects the drop in the air outlet temperature, the detected temperature data will be fed back to the MCU of the controller. Since the high-speed hair dryer has a constant temperature function, when the controller MCU learns that the temperature has dropped, it will issue an instruction and be forced to increase the speed of the high-speed motor 2 to accelerate the removal of heat, thereby achieving the effect of increasing the air outlet temperature. The increase in the speed of the motor 2 will directly lead to the increase in the working current of the motor 2, exceeding the normal current value (such as the normal current value of the motor 2 with a diameter of Ф29 is 0.55A), that is, when the operating current of the motor 2 is within the second range, it indicates that the back cover 5 needs to be dusted and the air inlet filter assembly 6 needs to be dusted.

[0058] Furthermore, the hair dryer in this embodiment has a handle assembly 9, on which a power cord assembly is provided, a control panel assembly is provided inside, and a control switch 8 is provided outside for controlling the operation of the hair dryer. The hair dryer also has a wind temperature adjustment switch 7, which is connected to the motor 2 and the controller, and is used to control the controller to start the motor 2 to reverse in response to the user's operation on the wind temperature adjustment switch 7, so as to realize the dust removal operation of the rear cover 5 and the air inlet filter assembly 6.

[0059] In order to remove static electricity in the hair dryer, the hair dryer also includes a negative ion generator connected to the motor 2 for assisting dust removal. When the user sees the flash light strobing, the hair dryer is turned off by the control switch 8, and the wind temperature adjustment switch 7 is pressed for 5 seconds. The controller notifies the drive board assembly to start the motor 2 to reverse, and the negative ion generator is turned on at the same time to achieve dust cleaning on the surface of the air inlet filter assembly 6 or the rear cover 5 for 10 seconds.

[0060] In another embodiment, the motor 2 is covered with a silicone sleeve for vibration reduction.

[0061] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A filter dust detection system, arranged in a hair dryer, characterized in that: The filter dust accumulation detection system comprises: A temperature detector (1), arranged in the hair dryer, for detecting the outlet air temperature of the hair dryer; A controller connected to the temperature detector (1) and used to receive a temperature value detected by the temperature detector (1); A motor (2) connected to the controller, and configured to increase the operating speed in response to control of the controller when the temperature value is within a first range; A motor (2) driving board, connected to the motor (2) and used to detect the operating current value of the motor (2); A lighting component is connected to the motor (2) drive board and is used to output a lighting prompt indicating that filter dust removal is required when it is known that the current value is within the second range.

2. The filter dust detection system according to claim 1, characterized in that: The temperature detector (1) is arranged between the heating component (4) and the air outlet of the hair dryer.

3. The filter dust detection system according to claim 1, characterized in that: The lighting assembly comprises a light board (10) and a flashlight, wherein the light board (10) is connected to a motor (2) drive board so as to control the flashlight to output a light prompt when it is known that the current value is within a second range.

4. The filter dust detection system according to claim 1, characterized in that: The temperature detector (1) is an NTC.

5. A hair dryer, characterized in that: It comprises a shell (3), and a filter dust accumulation detection system as claimed in any one of claims 1 to 4 arranged in the shell (3).

6. The hair dryer according to claim 5, characterized in that: The housing (3) comprises an upper housing and a lower housing that are butt-jointed with each other, the upper housing and the lower housing comprise two opposite ends, the first end forms an air outlet, the second end forms an air inlet, and the air inlet is provided with a rear cover (5) covered with air inlet holes; When the operating current of the motor (2) is within the second range, it indicates that the rear cover (5) needs to be dusted.

7. The hair dryer according to claim 6, characterized in that: The hair dryer further comprises an air inlet filter assembly (6) located inside the housing (3) and between the rear cover (5) and the motor (2); When the operating current of the motor (2) is within the second range, it indicates that the air inlet filter assembly (6) needs to be dusted.

8. The hair dryer according to claim 7, characterized in that: The hair dryer has a control switch (8) for controlling the operation of the hair dryer; The hair dryer also has a wind temperature adjustment switch (7), which is connected to the motor (2) and the controller, and is used to control the controller to start the motor (2) to reverse in response to the user's operation on the wind temperature adjustment switch (7), thereby realizing the dust removal operation of the rear cover (5) and the air inlet filter assembly (6).

9. The hair dryer according to claim 8, characterized in that: The hair dryer also includes a negative ion generator connected to the motor (2) and used to assist in dust removal.

10. The hair dryer according to claim 5, characterized in that: The outer cover of the motor (2) is provided with a silica gel cover for vibration reduction.

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