Hair drier and tuyere

Abstract

The embodiment of the invention provides an air blower and an air nozzle. The hair dryer comprises a hair dryer body, a dToF module and a control module, wherein the dToF module and the control module are arranged in the hair dryer body. The dToF module is configured to emit probe light, receive the reflected probe light and generate a photon flight time statistical histogram; and the control module is configured to judge whether the blower main body is provided with an air nozzle or not according to the histogram and correspondingly adjust blowing parameters of the blower.

Description

Technical Field

[0001] The present disclosure relates to the technical field of intelligent electrical equipment, and in particular to a hair dryer and a nozzle. Background Art

[0002] Hair dryers usually have a detachable nozzle, which will affect the blowing effect of the hair dryer to a certain extent. When using a hair dryer, users generally manually adjust the hair dryer's blowing speed, temperature and other blowing parameters and the blowing distance (the distance between the hair dryer's air outlet and the object to be blown) by observing whether the hair dryer is equipped with a nozzle, so as to achieve the best blowing effect.

[0003] At present, there are new types of intelligent hair dryers that can automatically identify whether a nozzle is installed and adaptively adjust various parameters of the hair dryer according to the identification results. However, there is a problem that the recognition sensitivity of the nozzle is low, resulting in untimely automatic adjustment of the hair dryer parameters and a poor hair-drying experience for users. Summary of the invention

[0004] In view of this, an embodiment of the present disclosure provides a hair dryer and a nozzle.

[0005] To achieve the above objectives, the technical solution of the present disclosure is implemented as follows:

[0006] In the first aspect, an embodiment of the present disclosure provides a hair dryer, comprising a hair dryer main body and a dToF module and a control module arranged in the hair dryer main body; the dToF module is configured to emit detection light and receive the reflected detection light, and generate a photon flight time statistical histogram; the control module is configured to determine whether the hair dryer main body is equipped with a nozzle according to the histogram, and adjust the blowing parameters of the hair dryer accordingly.

[0007] In some embodiments, the control module is configured to determine whether the hair dryer body is installed with a nozzle based on the histogram, including: determining whether there is a preset peak in the detection peak of the histogram; if the preset peak exists, determining that the hair dryer body is installed with a nozzle, otherwise determining that the hair dryer body is not installed with a nozzle; wherein the preset peak is a detection peak whose peak parameters meet a first preset condition; the peak parameters include at least one of the shape, position, height, half-height width, integral value, standard deviation, and confidence level of the peak.

[0008] In some embodiments, the dToF module is configured to: generate at least two histograms within a preset time period; the control module is configured to: determine whether the hair dryer body is equipped with a nozzle based on whether at least two of the histograms meet a second preset condition; wherein the second preset condition is that the difference in peak parameters of the preset peaks in at least two of the histograms is less than a first preset threshold.

[0009] In some embodiments, the control module is configured to: when it is determined that the hair dryer body is not equipped with a nozzle, adjust the blowing parameters of the hair dryer until the hair dryer enters a first blowing mode; when it is determined that the hair dryer body is equipped with a nozzle, adjust the blowing parameters of the hair dryer until the hair dryer enters a second blowing mode; the first blowing mode is different from the second blowing mode.

[0010] In some embodiments, the control module is further configured to: determine a target distance between the hair dryer and a target object according to a target peak in the histogram, wherein the target peak is a detected peak in the histogram other than the preset peak.

[0011] In some embodiments, the dToF module is also configured to emit reference light, receive the reference light and generate the histogram; the optical path of the reference light is located inside the dToF module; the control module is configured to calculate the absolute distance between the hair dryer and the target object based on the reference peak and the target peak corresponding to the reference light in the histogram.

[0012] In some embodiments, the control module is configured to: when it is determined that a nozzle is installed on the hair dryer body, control the pulse width of the detection light emitted by the dToF module to be less than a second preset threshold; the second preset threshold is determined according to the structure of the nozzle.

[0013] In the second aspect, the embodiments of the present disclosure also provide a nozzle, which is suitable for the hair dryer in any of the above embodiments, wherein the hair dryer comprises a hair dryer main body and a dToF module and a control module arranged inside the hair dryer main body, and the nozzle is detachably installed at the air outlet of the hair dryer main body; the nozzle comprises an outer shell and a baffle arranged inside the outer shell, an air flow channel is left between the baffle and the inner wall of the outer shell, and at least part of the baffle is located within the detection field of view of the dToF module.

[0014] In some embodiments, the blocking member is a two-dimensional planar structure or a three-dimensional structure.

[0015] In some embodiments, the baffle has an inclined guide structure or a streamlined structure, and the airflow blown out of the hair dryer body flows along the inclined guide structure or the streamlined structure to the nozzle opening of the nozzle.

[0016] The disclosed embodiment provides a hair dryer and a nozzle. The hair dryer includes a hair dryer main body and a dToF module and a control module disposed in the hair dryer main body; the dToF module is configured to emit detection light and receive the detection light reflected back, and generate a photon flight time statistical histogram; the control module is configured to determine whether the hair dryer main body is equipped with a nozzle according to the histogram, and adjust the blowing parameters of the hair dryer accordingly. The disclosed embodiment determines whether the hair dryer is equipped with a nozzle through the dToF module and the control module, and adjusts the blowing parameters of the hair dryer accordingly. It not only has the characteristics of high sensitivity in identifying whether the hair dryer is equipped with a nozzle, but also can timely adjust the blowing parameters according to whether the hair dryer is equipped with a nozzle to improve the user experience, and has low manufacturing cost and simple manufacturing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1a A structural schematic diagram 1 of a hair dryer provided in an embodiment of the present disclosure;

[0018] Figure 1b A structural diagram of a hair dryer provided in an embodiment of the present disclosure Figure 2 ;

[0019] Figure 2 A schematic diagram of the circuit structure inside the hair dryer body provided by an embodiment of the present disclosure;

[0020] Figure 3 Schematic diagram 1 of a histogram provided for an embodiment of the present disclosure;

[0021] Figure 4 A schematic diagram of the structure of a dToF module provided in an embodiment of the present disclosure;

[0022] Figure 5 Schematic diagram of the histogram provided by the embodiment of the present disclosure Figure 2 ;

[0023] Figure 6a This is an appearance diagram of the air nozzle provided in the embodiment of the present disclosure, Figure 6b for Figure 6a Schematic diagram of the bottom of the stroke mouth. Figure 6c for Figure 6a Schematic diagram of the stroke mouth from above. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present disclosure and the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the present disclosure. However, it is obvious to those skilled in the art that the present disclosure can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present disclosure, some technical features known in the art are not described; that is, all features of actual embodiments are not described here, and well-known functions and structures are not described in detail.

[0026] In the drawings, the sizes of layers, regions, elements and their relative sizes may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0027] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other elements or layers, there is no intervening element or layer. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer or part discussed below can be represented as the second element, component, region, layer or part. And when the second element, component, region, layer or part is discussed, it does not indicate that the present disclosure necessarily has the first element, component, region, layer or part.

[0028] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used here for convenience of description to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, the spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is turned over, then the elements or features described as "under other elements" or "under it" or "under it" will be oriented as "on" other elements or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0029] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present disclosure. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0030] In order to thoroughly understand the present disclosure, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present disclosure. The preferred embodiments of the present disclosure are described in detail below, but in addition to these detailed descriptions, the present disclosure may also have other implementations.

[0031] In the related art, there is a new type of intelligent hair dryer that determines whether a nozzle is installed on the hair dryer by setting a magnetic field sensor on the hair dryer's wind tube, and then adjusts various parameters of the hair dryer according to the judgment result. However, this solution requires setting a magnetic field sensor on the hair dryer and setting a magnetic component or metal component on the wind nozzle. Not only is the production cost high and the production process complicated, but its sensitivity in identifying whether the hair dryer is equipped with a nozzle is affected by many factors (such as the magnetic size of the magnetic component on the wind nozzle, the size of the nearby magnetic field, and the delay in the conversion of magnetic energy and electrical energy, etc.), making its sensitivity low or even unstable, resulting in untimely adjustment of the hair dryer parameters and poor user experience.

[0032] In view of this, an embodiment of the present disclosure provides a hair dryer. Figure 1a This is a structural schematic diagram of a hair dryer provided by an embodiment of the present disclosure. Figure 1a The hair dryer includes a hair dryer main body 100, a dToF module 110 and a control module arranged in the hair dryer main body 100; the dToF module 110 is configured to emit detection light and receive the reflected detection light, and generate a photon flight time statistical histogram; the control module is configured to determine whether the hair dryer main body 100 is equipped with a nozzle according to the histogram, and adjust the blowing parameters of the hair dryer accordingly.

[0033] In some embodiments, the dToF module 110 is configured to generate a histogram based on the flight time of the photons of the detection light. The horizontal axis of the histogram is time T, which is divided into multiple time bins of equal width; the vertical axis is the photon count value N. It should be noted that the flight time of the photons of the detection light refers to the time required for the photons in the detection light to be emitted and reflected back to the dToF module.

[0034] In some embodiments, when the hair dryer body 100 is not equipped with a nozzle, there may be an interfering object outside the air outlet of the hair dryer body; when the hair dryer body 100 is equipped with a nozzle, there may be an interfering object outside the nozzle of the nozzle. The interfering object refers to an object that can form a detection peak in the histogram in addition to the target object (hair or object surface that needs to be air-dried). Exemplarily, when a user uses a hair dryer, he usually first points the air outlet to the palm to sense the temperature and wind speed, and then adjusts the temperature and wind speed of the hair dryer to be suitable for air-drying hair or other objects. At this time, the palm is the above-mentioned "interfering object".

[0035] In some embodiments, assuming that the hair dryer is not directly blowing air on the target object when it is turned on, there are the following situations:

[0036] When the hair dryer body 100 is not equipped with a nozzle and there is no interfering object outside the air outlet of the hair dryer body, most of the detection light is only emitted but not reflected back. At this time, the photon count in each time bin in the histogram generated by the dToF module 110 is zero, or due to the interference of environmental noise or background light, the dToF module 110 receives a small number of photons, and at this time, there may be a small number of photon counts in some time bins. In other words, in this case, the photon count in the histogram is zero or there is a small number of photon counts and they are dispersed in the histogram.

[0037] When the hair dryer body 100 is not equipped with an air nozzle and there is an interfering object outside the air outlet of the hair dryer body, the dToF module 110 emits detection light and receives the detection light reflected back by the interfering object, and generates a photon flight time statistical histogram. At this time, there is a detection peak corresponding to the interfering object in the histogram generated by the dToF module 110.

[0038] When the hair dryer body 100 is equipped with a nozzle and there is no interfering object outside the nozzle opening of the nozzle, the dToF module 110 emits detection light and receives the detection light reflected back by the nozzle, and generates a photon flight time statistical histogram. At this time, there is a detection peak corresponding to the nozzle in the histogram generated by the dToF module 110.

[0039] When the hair dryer body 100 is equipped with a nozzle and there is an interfering object outside the nozzle opening of the nozzle, the dToF module 110 emits detection light and receives detection light reflected by the nozzle and the interfering object, and generates a photon flight time statistical histogram. At this time, the histogram generated by the dToF module 110 contains a detection peak corresponding to the nozzle and a detection peak corresponding to the interfering object.

[0040] Since the interfering object and the air nozzle have different reflective properties such as material, color, or surface roughness, and / or the distances between the interfering object and the air nozzle and the dToF module 110 are different, when the hair dryer body 100 is equipped with an air nozzle and there is an interfering object outside the air nozzle of the air nozzle, the detection peak corresponding to the air nozzle in the histogram and the detection peak corresponding to the interfering object in the histogram are also different, so the control module can distinguish the interfering object and the air nozzle according to the parameter characteristics of the detection peak in the histogram. Therefore, the control module can determine whether the hair dryer body 100 is equipped with an air nozzle according to the histogram and adjust the blowing parameters of the hair dryer accordingly.

[0041] In some embodiments, assuming that the hair dryer is turned on to blow air directly to the target object, similar to the above situation, there may be detection peaks corresponding to the target object (referred to as "target peaks") and detection peaks corresponding to the interfering object or the air nozzle in the histogram. At this time, the control module can still distinguish the target peak from the detection peaks corresponding to the interfering object or the air nozzle according to the parameter characteristics of the detection peaks in the histogram, and then determine whether the hair dryer body 100 is equipped with an air nozzle and adjust the blowing parameters of the hair dryer accordingly.

[0042] The hair dryer provided in the embodiment of the present disclosure can determine whether the hair dryer is equipped with a nozzle through the dToF module and the control module, and adjust the blowing parameters of the hair dryer accordingly. Compared with the magnetic field sensor to identify whether the hair dryer is equipped with a nozzle, it not only does not need to add metal coils and magnetic components (or metal components), but also has the advantages of low manufacturing cost and simple manufacturing process. It also has the characteristics of high sensitivity in identifying the nozzle, accurate judgment, and more flexible adjustment of the hair dryer's blowing parameters. It can adjust the blowing parameters in time according to whether the hair dryer is equipped with a nozzle to improve the user's experience.

[0043] In some embodiments, the hair dryer further comprises an air supply module disposed in the hair dryer body 100, and the air supply module may specifically comprise a heating component and a fan component. The heating component is configured to adjust the air temperature of the hair dryer, and the fan component is configured to adjust the air volume and / or wind speed of the hair dryer. It should be noted that the hair dryer body 100 comprises an air outlet 101, and the air outlet 101 may be connected to a connection port of the air nozzle.

[0044] See also Figure 1a The hair dryer further includes a handle 102, on which a switch is provided, such as any one of a button switch, a knob switch or a touch switch. When the switch is turned on, the dToF module 110, the control module and the air supply module start to operate, and when the switch is turned off, the dToF module 110, the control module and the air supply module stop operating. In addition, the switch may also have other gears, such as cold wind, hot wind, strong wind, gentle wind and the like.

[0045] Figure 1b A structural diagram of a hair dryer provided in an embodiment of the present disclosure Figure 2 , Figure 1b Take the example of a hair dryer with a nozzle installed on its main body. Figure 1b The connection port of the air nozzle 210 is connected to the air outlet 101 , and the air generated by the air supply module is sent to the air nozzle 210 through the air outlet 101 , and then sent to the outside of the air nozzle 210 through the air nozzle opening 211 .

[0046] Figure 2 This is a schematic diagram of the circuit structure inside the hair dryer body provided by the embodiment of the present disclosure. Figure 2 The control module 120 is coupled to the dToF module 110 and the air supply module 130. Thus, the control module 120 can receive the histogram generated by the dToF module 110 and judge whether the hair dryer body is equipped with a nozzle, and control the heating component and the fan component in the air supply module 130 accordingly according to the judgment result to adjust the blowing parameters of the hair dryer. It should be noted that Figure 2 The circuit structure schematic diagram shown in only shows some modules in the hair dryer body, which is only an exemplary description and is not used to limit the specific circuit structure in the hair dryer body of the present disclosure.

[0047] In some embodiments, the control module 120 is configured to determine whether the hair dryer main body 100 is installed with an air nozzle based on the histogram, including: determining whether there is a preset peak in the detection peak of the histogram; if there is a preset peak, determining that an air nozzle is installed on the hair dryer main body 100; otherwise, determining that an air nozzle is not installed on the hair dryer main body 100; wherein the preset peak is a detection peak whose peak parameters meet the first preset condition; the peak parameters include at least one of the shape, position, height, half-height width, integral value, standard deviation, and confidence of the peak.

[0048] In some embodiments, the control module 120 stores a first preset condition related to the peak parameter. Specifically, the first preset condition may be a preset range of the peak parameter of the detection peak corresponding to the air nozzle. The preset range may be determined by performing a large number of tests and statistics when the air nozzle is installed on the hair dryer body 100. If there is a detection peak whose peak parameter falls within the preset range in the histogram, it is determined that the hair dryer body 100 is installed with the air nozzle. If there is no detection peak whose peak parameter falls within the preset range in the histogram, it is determined that the hair dryer body 100 is not installed with the air nozzle.

[0049] In the disclosed embodiment, the peak parameters are related to the shape, position, height, half-height width, integral value, standard deviation, and confidence of the peak. Specifically, one or more features can be selected according to the features of the detection peak in the histogram to form the peak parameters, and then the features included in the peak parameters are compared with the preset ranges corresponding to the features under the first preset condition. If the features included in the peak parameters of a certain detection peak all fall within the corresponding preset range, then the detection peak can be judged to be a preset peak, and then it can be judged that a nozzle is installed on the hair dryer body 100.

[0050] In some embodiments, in order to reduce the misjudgment caused by accidental events or interference conditions such as environmental noise and background light, the dToF module 110 can generate at least two histograms in a relatively close time period, and the control module 120 can determine whether a nozzle is installed on the hair dryer body 100 according to the ratio of the histograms with preset peaks in at least two histograms (i.e., the ratio of the number of histograms with preset peaks to the number of all histograms). For example, taking the dToF module 110 generating three histograms as an example, if the preset peaks exist in the detection peaks of the three histograms, the control module 120 determines that the hair dryer body 100 is installed with a nozzle; if the preset peaks do not exist in the detection peaks of the three histograms, the control module 120 determines that the hair dryer body 100 is not installed with a nozzle; if one of the three histograms has a preset peak, the control module 120 can determine that the hair dryer body 100 is not installed with a nozzle; if two of the three histograms have preset peaks, the control module can determine that the hair dryer body 100 is installed with a nozzle.

[0051] In some embodiments, the dToF module 110 generates multiple histograms. If there is a preset peak in a histogram whose proportion exceeds a first proportion (for example, 90% or 80%) among the multiple histograms, or there is a preset peak in a histogram whose number exceeds a preset number (for example, 5) among the multiple histograms, the control module 120 can determine that the hair dryer body 100 is equipped with a nozzle, otherwise the control module 120 determines that the hair dryer body 100 is not equipped with a nozzle.

[0052] For example, after the hair dryer is turned on for a period of time, the nozzle is installed on the hair dryer body 100. At this time, only the first few histograms among the multiple histograms (when the nozzle is not installed) do not have the preset peak, but the preset peak exists in the multiple histograms generated after the nozzle is installed. To avoid the control module 120 from making an incorrect judgment, the control module 120 can be configured to judge that the hair dryer body 100 is installed with an air nozzle when the preset peak exists in more than a preset number of histograms, otherwise it is judged that the hair dryer body 100 is not installed with the air nozzle; or, the control module 120 can be configured to judge that the hair dryer body 100 is installed with the air nozzle when the preset peak exists in a histogram whose proportion in the multiple histograms exceeds a first proportion, otherwise it is judged that the hair dryer body 100 is not installed with the air nozzle.

[0053] In some embodiments, when using multiple histograms to determine whether an air nozzle is installed on the hair dryer body 100, the control module 120 can configure the frame time of each histogram (the measurement time corresponding to a histogram) to be less than a first preset time threshold to reduce the time required to determine whether an air nozzle is installed and improve the judgment efficiency.

[0054] In the disclosed embodiment, the control module determines whether there is a preset peak in the detection peak of the histogram, so as to quickly and accurately identify whether the hair dryer body is equipped with a nozzle.

[0055] In some embodiments, the air nozzle includes a plurality of different types, such as an air collecting nozzle, a diffuser nozzle, a soft air nozzle or an anti-flying air nozzle. Different types of air nozzles have different structural / reflection characteristics, so that different types of air nozzles correspond to different preset peaks. In this way, the control module is also configured to determine the type of air nozzle installed on the hair dryer body according to the peak parameters of the preset peak in the histogram to adjust the blowing parameters of the hair dryer accordingly according to the type of air nozzle. It should be noted that the control module stores preset peaks corresponding to different types of air nozzles, as well as preset ranges corresponding to the peak parameters of different preset peaks.

[0056] In some embodiments, the dToF module is configured to: generate at least two histograms within a preset time period; the control module is configured to: determine whether the hair dryer body is installed with a nozzle based on whether the at least two histograms meet a second preset condition; wherein the second preset condition is that the difference in peak parameters of preset peaks in at least two histograms is less than a first preset threshold.

[0057] In some embodiments, the dToF module 110 can continuously emit detection light, and a histogram can be generated after a single measurement time (i.e., frame time), and the length of the preset time period is at least greater than or equal to the sum of the two measurement times, and the length of the preset time period is less than the second preset time threshold, so that multiple histograms can be quickly generated in a shorter time. Thus, the dToF module 110 can generate at least two histograms within the preset time period. Taking the dToF module 110 generating three histograms within the preset time period as an example, if there are preset peaks in the detection peaks of the three histograms, and the difference in the peak parameters of the preset peaks in the three histograms is less than the first preset threshold, that is, when the three histograms meet the second preset condition, the control module 120 determines that the hair dryer body 100 is equipped with a nozzle, otherwise it is determined that the hair dryer body 100 is not equipped with a nozzle.

[0058] In some embodiments, the dToF module 110 generates at least two histograms within a preset time period. If a preset peak exists in a histogram whose proportion among multiple histograms exceeds a first proportion and a difference in peak parameters of the preset peak in the histogram with the preset peak is less than a first preset threshold, that is, a histogram whose proportion among multiple histograms exceeds the first proportion satisfies a second preset condition, the control module 120 determines that the hair dryer main body 100 is installed with a nozzle, otherwise, it determines that the hair dryer main body 100 is not installed with a nozzle.

[0059] In other embodiments, if there are more than a preset number of histograms with preset peaks in multiple histograms and the difference in peak parameters of the preset peaks in the histograms with preset peaks is less than a first preset threshold, that is, if there are more than a preset number of histograms in multiple histograms that meet the second preset condition, the control module 120 determines that the hair dryer main body 100 is installed with a nozzle, otherwise the control module 120 determines that the hair dryer main body 100 is not installed with a nozzle.

[0060] In the disclosed embodiment, the control module determines whether the histogram satisfies the second preset condition, that is, when there is a preset peak in at least two histograms, and further determines whether the difference in the peak parameters of the preset peaks in at least two histograms is less than the first preset threshold value. This can eliminate the possibility that the presence of preset peaks in multiple histograms due to other interfering objects may cause misjudgment, and more accurately identify whether the hair dryer body is equipped with a nozzle, further improving the recognition sensitivity and accuracy of the nozzle.

[0061] In some embodiments, if there is a preset peak in the detection peaks of at least two histograms, but some of the histograms in at least two histograms meet the second preset condition, and the other histograms do not meet the preset condition, the control module can determine that the hair dryer body is equipped with a nozzle but the nozzle is installed incorrectly / unstable, and the control module can also be configured to control the indicator element on the hair dryer body to send an indication signal, such as a flashing indicator light, a sound wave sensor generating a prompt sound, or a vibration sensor generating vibration, etc. In this way, the user can be reminded to reinstall the nozzle correctly.

[0062] In some embodiments, the control module is configured to: when it is determined that the hair dryer body is not equipped with a nozzle, adjust the blowing parameters of the hair dryer until the hair dryer enters a first blowing mode; when it is determined that the hair dryer body is equipped with a nozzle, adjust the blowing parameters of the hair dryer until the hair dryer enters a second blowing mode; the first blowing mode is different from the second blowing mode.

[0063] In some embodiments, the control module is configured to control the voltage, current or resistance of the heating component to adjust the wind temperature in the blowing parameters, and / or control the voltage, current or resistance of the fan component to adjust the wind volume and / or wind speed in the blowing parameters when determining that the hair dryer is not equipped with a nozzle, so that the hair dryer enters the first blowing mode. The control module is configured to control the voltage, current or resistance of the heating component to adjust the wind temperature in the blowing parameters, and / or control the voltage, current or resistance of the fan component to adjust the wind volume and / or wind speed in the blowing parameters when determining that the hair dryer is equipped with a nozzle, so that the hair dryer enters the second blowing mode.

[0064] In the disclosed embodiment, the control module can control the air supply module to adjust the air temperature, air volume and / or air speed according to different situations after determining whether the hair dryer is equipped with an air nozzle. In this way, the hair dryer can adjust the blowing parameters of the hair dryer accordingly when the air nozzle is installed or not, so as to avoid damage to the user's scalp and / or hair caused by inappropriate air temperature, air volume and / or air speed, thereby improving the user's experience.

[0065] In some embodiments, the control module is further configured to: determine a target distance between the hair dryer and the target object according to a target peak in the histogram, wherein the target peak is a detected peak other than a preset peak in the histogram.

[0066] See also Figure 1bThe control module is configured to find the target peak in the histogram, filter the target peak noise and calculate the photon flight time to determine the target distance D between the hair dryer and the target object. Specifically, the control module stores the distance d1 between the dToF module and the air outlet of the hair dryer body. When the control module determines that there is no air nozzle installed on the hair dryer body 100 based on the measurement result of the dToF module, the control module will determine the distance D1=d0-d1 between the air outlet of the hair dryer and the target object based on the distance d0 between the dToF module and the target object measured by the dToF module, and then adjust the blowing parameters based on D1; in addition, the control module may also store the distance d2 between the dToF module and the air nozzle of the air nozzle. When the control module determines that there is an air nozzle installed on the hair dryer body 100 based on the measurement result of the dToF module, the control module will determine the distance D2=d0-d2 between the air nozzle of the air nozzle on the hair dryer body 100 and the target object based on the distance d0 between the dToF module and the target object measured by the dToF module, and then adjust the blowing parameters based on D2. It should be noted that D1 is the target distance D when the hair dryer body is not equipped with a nozzle, and D2 is the target distance D when the hair dryer body is equipped with a nozzle.

[0067] In some embodiments, the control module is configured to control the air supply module to adjust the wind temperature, air volume and / or wind speed according to the target distance when the hair dryer enters the first blowing mode or the second blowing mode. Specifically, the target distance and the blowing parameters have a first mapping relationship in the first blowing mode, and the target distance and the blowing parameters have a second mapping relationship in the second blowing mode. By way of example, the first mapping relationship may be M1=aD1+b, and the second mapping relationship may be M2=pD2+q, wherein a, b, p, q are constants, and M1 and M2 are blowing parameters (for example, wind temperature, air volume or wind speed). It should be noted that the mapping relationship between the blowing parameters and the target distance may not be limited to linear, continuous mapping, but may also be nonlinear, discrete mapping, which can be obtained through a large number of experimental statistics.

[0068] The disclosed embodiment can achieve distance measurement and determine whether a hair dryer body is equipped with a nozzle only through the dToF module and the control module, and can also adjust the blowing parameters of the hair dryer accordingly. This not only has higher sensitivity but also reduces production costs and difficulty.

[0069] Figure 3 A schematic diagram of a histogram provided in an embodiment of the present disclosure is shown in FIG. 1 . Figure 3 In the example, the detection peak of the histogram includes the preset peak corresponding to the nozzle and the target peak corresponding to the target object. Figure 3, the wind nozzle is closer to the dToF module, the area of ​​the wind nozzle in the detection field of view of the dToF module is smaller, and the reflection characteristics of the wind nozzle and the target object are different. Therefore, it can be seen that compared with the various peak parameters of the preset peak 310 and the target peak 320 in the detection peak of the histogram, the preset peak 310 is located closer to the front, the integral is smaller, and the shapes of the preset peak 310 and the target peak 320 are also different.

[0070] It should be noted that the target object may be hair, hands, desktop, wall or other body parts of the user.

[0071] In some embodiments, the dToF module is also configured to emit reference light, receive reference light and generate a histogram; the optical path of the reference light is located inside the dToF module; and the control module is configured to calculate the absolute distance between the hair dryer and the target object based on the reference peak and target peak corresponding to the reference light in the histogram.

[0072] Figure 4 A schematic diagram of the structure of a dToF module provided in an embodiment of the present disclosure is shown in FIG. Figure 4 In this paper, the reference light and the detection light use the same transmitting end and different receiving ends as an example. Figure 4 , the dToF module includes a shell 401, a transmitting end 402, a first receiving end 403 and a second receiving end 404. The reference light is emitted from the transmitting end 402, irradiated on the reflection area 405 on the shell 401 and reflected back to the first receiving end 403. The detection light is emitted from the transmitting end 402, irradiated on the target object and reflected back to the second receiving end 404. The dToF module generates a photon flight time statistical histogram based on this. Among them, the control module is configured to calculate the distance (zero distance) between the transmitting end and the shell of the dToF module according to the reference peak in the histogram, and the control module is also configured to calibrate the target distance according to the zero distance to obtain the absolute distance, that is, absolute distance = target distance - zero distance. It should be noted that the reflection area mentioned in the present disclosure can be a point or a surface with a boundary, and the present disclosure does not impose any restrictions on this.

[0073] In some embodiments, the dToF module further includes a light baffle 406, which separates the first receiving end 403 from the second receiving end 404 to avoid interference between the reference light and the detection light. It should be noted that the reference light and the detection light can use the same transmitter and receiver, or different transmitters and receivers. It should be noted that the control module can be set inside the housing of the dToF module, or outside the housing of the dToF module.

[0074] In some embodiments, the control module is configured to control the air supply module to adjust the air temperature, air volume and / or wind speed according to the absolute distance when the hair dryer enters the first blowing mode or the second blowing mode. This can avoid affecting the accuracy of adjusting the blowing parameters due to the existence of zero distance.

[0075] In some embodiments, the housing of the dToF module may include heat-insulating materials to reduce the impact of wind temperature on the histogram; or the dToF module may include a temperature drift compensation module to compensate for the impact of wind temperature on the histogram. This can improve the reliability of the dToF module.

[0076] In some embodiments, the control module stores a peak parameter range of the reference peak, and the control module is configured to confirm the detection peak corresponding to the reference light (i.e., the reference peak) and the preset peak corresponding to the nozzle according to the peak parameters of the detection peak of the histogram, and the target peak is the detection peak other than the reference peak and the preset peak in the histogram. It should be noted that in order to reduce the probability of misjudgment of the detection peak caused by accidental events and environmental factors, the dToF module can also filter the histogram to eliminate background noise interference.

[0077] Figure 5 Schematic diagram of the histogram provided by the embodiment of the present disclosure Figure 2 , Figure 5 In the example, the detection peaks of the histogram include the reference peak, the preset peak corresponding to the nozzle, and the target peak corresponding to the target object. Figure 5 , since the position of the detection peak in the histogram is only related to the detection distance, the various types of detection peaks can be judged and distinguished according to the front and rear positions of the detection peaks in the histogram. Specifically, the reflection area on the shell of the dToF module is closer to the transmitting end and the receiving end of the dToF module, so the position of the reference peak 510 is closer to the front, the reflection area of ​​the wind nozzle is slightly farther than the reflection area on the shell of the dToF module, and the reflection area of ​​the target object is farther, so the front and rear order of the three detection peaks in the histogram is the reference peak 510, the preset peak 310 and the target peak 320, and the shapes of the reference peak 510, the preset peak 310 and the target peak 320 are also different.

[0078] In some embodiments, the control module is configured to: when it is determined that a nozzle is installed on the hair dryer body, control the pulse width of the detection light emitted by the dToF module to be less than a second preset threshold; the second preset threshold is determined according to the structure of the nozzle.

[0079] In some embodiments, when the hair dryer is equipped with a nozzle, considering that there will be preset peaks and target peaks in the histogram generated by the dToF module, the distance between the dToF module and the nozzle (specifically the reflection area on the nozzle) is S1, and the minimum distance between the dToF module and the target object is S2, the distance between the dToF module and the nozzle mouth. Therefore, it can be concluded that the flight time of the photon from being emitted by the dToF module to the reflection area of ​​the nozzle and reflected back to the dToF module is t1=2*S1 / c, and the minimum flight time of the photon from being emitted by the ToF module to the target object and reflected back to the dToF module is t2=2*S2 / c, where c is the speed of light. That is, the shortest round-trip flight time of photons between the reflection area of ​​the wind nozzle and the target object is t2-t1. If the pulse width of the detection light is greater than or equal to t2-t1, the photons reflected from the reflection area of ​​the wind nozzle back to the dToF module and the photons reflected from the target object back to the dToF module will overlap in time, that is, the preset peak and the target peak in the histogram overlap.

[0080] Therefore, according to the structure of the wind nozzle, specifically the position of the reflection area of ​​the wind nozzle in the wind nozzle, the pulse width of the detection light can be made smaller than the photon flight time corresponding to the round-trip distance between the reflection area of ​​the wind nozzle and the wind nozzle opening, so that the preset peak and the target peak can be prevented from overlapping, thereby avoiding affecting the control module's judgment of the preset peak and causing errors when the control module calculates the target distance. That is, the second preset threshold can be determined according to the structure of the wind nozzle, and the pulse width of the detection light can be made smaller than the second preset threshold to ensure that the preset peak and the target peak are separated and independent from each other and do not interfere with each other.

[0081] An embodiment of the present disclosure also provides an air nozzle, which is suitable for a hair dryer in any of the above embodiments. The hair dryer includes a hair dryer main body and a dToF module and a control module arranged inside the hair dryer main body. The air nozzle can be detachably installed at the air outlet of the hair dryer main body; the air nozzle includes an outer shell and a baffle arranged inside the outer shell, an air flow channel is left between the baffle and the inner wall of the outer shell, and at least part of the baffle is located within the detection field of view of the dToF module.

[0082] Figure 6a A schematic diagram of the structure of the air nozzle provided in the embodiment of the present disclosure, Figure 6b for Figure 6a Schematic diagram of the bottom surface of the nozzle (the bottom surface of the nozzle is the side where the nozzle and the hair dryer body are embedded). Figure 6c for Figure 6a Schematic diagram of the top surface of the nozzle (the top surface of the nozzle is the side of the nozzle away from the hair dryer body). Figures 6a to 6c, the air nozzle includes a shell 610 and a baffle 620, and the shell 610 includes a nozzle opening 611 and a connection port 612. Among them, the nozzle opening 611 is used to send the air generated by the air supply module to the outside of the air nozzle, and the connection port 612 is used to connect to the air outlet of the hair dryer body. The part of the baffle 620 located in the detection field of view of the dToF module serves as a reflection area in the air nozzle to reflect the detection light. An air flow channel is left between the baffle 620 and the shell 610 to prevent the wind generated by the air supply module from being blown out of the hair dryer. It should be noted that the detection field of view refers to the area that can be illuminated by the detection light, that is, the detection field of view of the detection light. The connection method of the connection port 612 and the air outlet of the hair dryer body can be one of a snap-on connection, a rotation locking connection, a socket connection, etc.

[0083] The baffles set in different types of wind nozzles have at least one different reflective property such as material, color, or surface roughness, are set at different positions in the wind nozzle, and / or are at different distances from the dToF module; so that the peak parameters of the preset peaks corresponding to different wind nozzles (specifically baffles) are different.

[0084] In some embodiments, the blocking member is a two-dimensional planar structure or a three-dimensional structure.

[0085] In some embodiments, the baffle is a two-dimensional planar structure, and the baffle may be in the form of a sheet, such as a circle, a polygon, or an irregular shape; the baffle may also be in the form of a ring, such as a circular ring, an elliptical ring, a polygonal ring, or an irregular ring; the baffle may also be in the form of a mesh, such as a circle with multiple holes, a polygon with multiple holes, or an irregular shape with multiple holes, and the shape of the hole may also be a circle, a polygon, or an irregular shape.

[0086] In some embodiments, the baffle is a three-dimensional structure, such as a cone, a table, a column or other irregular three-dimensional structure. If the baffle is a cone, the vertex of the baffle can be directed toward the hair dryer body, and the bottom of the baffle can be directed toward the outside of the air nozzle, so that the airflow blown out of the hair dryer body can flow along the side wall of the baffle to the air nozzle.

[0087] The baffle can be set at the central axis of the air nozzle, or at a position directly opposite to the dToF module inside the hair dryer body (the center line of the baffle coincides with the center line of the detection field of view of the dToF module) to improve the directionality problem of air nozzle detection (i.e., the dToF module can detect the air nozzle in certain detection directions / fields of view, but cannot detect the air nozzle in certain detection directions / fields of view).

[0088] In some embodiments, the smaller the orthographic projection area of ​​the baffle in the plane parallel to the air outlet, the smaller the blowing resistance of the hair dryer, thereby reducing the influence of the baffle on the wind speed and air volume.

[0089] In some embodiments, the baffle has an inclined guide structure or a streamlined structure, and the airflow blown out of the hair dryer body flows along the inclined guide structure or the streamlined structure to the nozzle opening of the nozzle.

[0090] In some embodiments, the baffle has an inclined flow-guiding structure or a streamlined structure, such as a trumpet, a pipe, or a semi-circular column, etc. In this way, the airflow blown out of the hair dryer body can flow to the air nozzle along the flow-guiding direction of the baffle to reduce the blowing resistance of the hair dryer body, thereby reducing the influence of the baffle on the wind speed and air volume.

[0091] The disclosed embodiment provides a hair dryer and a nozzle. The hair dryer includes a hair dryer body and a dToF module and a control module disposed in the hair dryer body; the dToF module is configured to emit detection light and receive the reflected detection light, and generate a photon flight time statistical histogram; the control module is configured to determine whether the hair dryer body is equipped with a nozzle according to the histogram, and adjust the blowing parameters of the hair dryer accordingly. The disclosed embodiment determines whether the hair dryer is equipped with a nozzle through the dToF module and the control module, and adjusts the blowing parameters of the hair dryer accordingly. It not only has the characteristics of high sensitivity in identifying whether the hair dryer is equipped with a nozzle, but also can timely adjust the blowing parameters according to whether the hair dryer is equipped with a nozzle to improve the user experience, and has low manufacturing cost and simple manufacturing process.

[0092] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present disclosure, the size of the serial number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure. The serial numbers of the embodiments of the present disclosure are for description only and do not represent the advantages and disadvantages of the embodiments.

[0093] The above description is only a preferred embodiment of the present disclosure, and does not limit the patent scope of the present disclosure. All equivalent structural changes made by using the contents of the present disclosure and the drawings under the inventive concept of the present disclosure, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present disclosure.

Claims

1. A hair dryer, characterized in that: It includes a hair dryer body and a dToF module and a control module arranged in the hair dryer body; The dToF module is configured to emit detection light and receive the detection light reflected back, and generate a photon flight time statistical histogram; The control module is configured to determine whether the hair dryer body is equipped with a nozzle according to the histogram, and adjust the blowing parameters of the hair dryer accordingly.

2. The hair dryer according to claim 1, characterized in that: The control module is configured to determine whether the hair dryer body is equipped with a nozzle according to the histogram, including: Determine whether there is a preset peak in the detection peak of the histogram, if there is the preset peak, determine that the hair dryer body is equipped with a nozzle, otherwise determine that the hair dryer body is not equipped with a nozzle; Among them, the preset peak is a detection peak whose peak parameters meet the first preset condition; the peak parameters include at least one of the shape, position, height, half-height width, integral value, standard deviation, and confidence level of the peak.

3. The hair dryer according to claim 2, characterized in that: The dToF module is configured to: generate at least two of the histograms within a preset time period; The control module is configured to determine whether the hair dryer body is equipped with a nozzle based on whether at least two of the histograms meet a second preset condition; wherein the second preset condition is that the difference in peak parameters of the preset peaks in at least two of the histograms is less than a first preset threshold.

4. The hair dryer according to any one of claims 1 to 3, characterized in that: The control module is configured to: When it is determined that the hair dryer body is not equipped with a nozzle, adjusting the blowing parameters of the hair dryer until the hair dryer enters a first blowing mode; When it is determined that the hair dryer body is equipped with a nozzle, the blowing parameters of the hair dryer are adjusted until the hair dryer enters a second blowing mode; the first blowing mode is different from the second blowing mode.

5. The hair dryer according to claim 2, characterized in that: The control module is further configured to determine a target distance between the hair dryer and a target object according to a target peak in the histogram, wherein the target peak is a detected peak in the histogram other than the preset peak.

6. The hair dryer according to claim 5, characterized in that: The dToF module is further configured to emit reference light, receive the reference light and generate the histogram; the optical path of the reference light is located inside the dToF module; The control module is configured to calculate an absolute distance between the hair dryer and a target object according to a reference peak and the target peak corresponding to the reference light in the histogram.

7. The hair dryer according to claim 6, characterized in that: The control module is configured to: when it is determined that a nozzle is installed on the hair dryer body, control the pulse width of the detection light emitted by the dToF module to be less than a second preset threshold; the second preset threshold is determined according to the structure of the nozzle.

8. A tuyere, characterized in that: A hair dryer adapted for use with any one of claims 1 to 7, the hair dryer comprising a hair dryer body and a dToF module and a control module disposed inside the hair dryer body, the air nozzle being detachably mounted at an air outlet of the hair dryer body; The wind nozzle includes a shell and a baffle arranged inside the shell, an air flow channel is left between the baffle and the inner wall of the shell, and at least a part of the baffle is located in the detection field of view of the dToF module.

9. The air nozzle according to claim 8, characterized in that: The blocking member is a two-dimensional planar structure or a three-dimensional structure.

10. The air nozzle according to claim 9, characterized in that: The blocking member has an inclined flow-guiding structure or a streamlined structure, and the airflow blown out from the hair dryer body flows along the inclined flow-guiding structure or the streamlined structure to the nozzle opening of the nozzle.

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