• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
      A battery-operated hairdryer includes a rechargeable battery pack that is electrically connected to a fan and heating element. The battery-operated hair dryer also includes a battery management and control module to control how to efficiently dry a user's hair while managing charge status and battery health.
    公开号:BR112020009065A2
    申请号:R112020009065-4
    申请日:2018-04-13
    公开日:2020-10-27
    发明作者:Eric Nelson；Christopher Rebholz；Erik Stafl；James MEREDITH；David Kirkland
    申请人:Follicle, Inc.；
    IPC主号:
    专利说明:

    [001] [001] This application is based on and claims priority to US Provisional Patent Application No. 62 / 584,528 filed on November 10, 2017, which is incorporated herein by reference in its entirety for all purposes. FIELD OF INVENTION
    [002] [002] The present invention generally relates to the field of portable electric hair dryers, and specifically to a portable battery operated hair dryer. FUNDAMENTALS
    [003] [003] In general, hair dryers, also called "blow dryers" are well known. Typical portable hair dryers blow ambient air or heated air over damp hair to accelerate the evaporation of water particles, thereby drying hair more quickly than it would dry on its own. Typical hair dryers are powered by electricity from the mains, that is, they are almost always plugged into an outlet for energy. Typical hair dryers include two main components: a fan and a heating element downstream of the fan that selectively heats the air as it is blown by the fan. The first hair dryers for home use were introduced in the first half of the 20th century and have only changed slightly in almost 100 years.
    [004] [004] The performance of the hair dryer can be measured in several different ways, but the most common measures include the rate of air flow, the speed of the air leaving the dryer and how much the air temperature increases in relation to the temperature of the ambient air.
    [005] [005] Existing hair dryers include a fan and at least one electric heating coil. The electric heating coils generate heat through the resistive heating process. The electric current that passes through the heating element is resisted by a wire coil that results in the generation of heat. Resistance heating elements are generally made of wire or ribbon that can be straightened, wound or molded in any other suitable way. Resistive heating elements require large amounts of electrical current to generate enough heat to dry your hair. As a result, hair dryers that use resistive heating elements have historically not been suitable for being powered by batteries.
    [006] [006] Typical hair dryers also include switches that allow the user to control the basic functions of the dryer. For example, typical hair dryers can include "high" "low" and "off" settings for heating, and a "high" and "low" setting for the fan. The aforementioned basic configurations are suitable for hairdryers that consume electricity from the mains, and so far there has been little motivation to better optimize the hairdryer's performance from the perspective of maintaining battery power.
    [007] [007] Until now, batteries capable of generating sufficient energy (voltage x current) for a sufficient period of time to allow reliable hair drying performance were prohibitively heavy, large and expensive. In the meantime, existing hair dryers, although lightweight, suffer from being tied to one outlet. In addition, a user who dries the hair must move the dryer continuously around the head, and the power cord is often a nuisance.
    [008] [008] As such, there is a need for a battery operated hair dryer that includes a battery management system.
    [009] [009] The present invention relates to a battery operated hair dryer. The hair dryer has a cabinet that contains all the components of the dryer. A battery pack, which includes at least one battery cell that is included in the case and which is electrically connected to a battery management and control module. The hair dryer also includes at least one switch to control the operation of the hair dryer. A heating set is arranged inside the cabinet and includes a fan connected to an electric motor. The heating set also includes at least one heating element. The motor is driven by the battery's electric current and turns the fan, which draws ambient air into an inlet and expels air through an outlet. The heating element is positioned so that the air passing through the heating unit can be heated to a temperature higher than the temperature of the ambient air. The battery management and control module is electrically connected to the heating assembly and adjusts the amount of current supplied by the battery assembly to the fan and heating element, to optimize the drying performance of the hair dryer at the same time. in which it maintains the charge and health of the battery pack.
    [010] [010] It will be understood by those skilled in the art that one or more aspects of this invention may meet certain objectives, while one or more other aspects may lead to other objectives. Other objects, characteristics, benefits and advantages of the present invention will be evident in this summary and descriptions of the disclosed embodiment and will be readily apparent to those skilled in the art. Such objec-
    [011] [011] FIGURE 1 is a perspective view of an embodiment of a battery operated hair dryer according to the invention;
    [012] [012] FIGURE 2 is a side view of the battery operated hair dryer of FIGURE 1;
    [013] [013] FIGURE 3 is an exploded perspective view of the battery operated hair dryer of FIGURE 1;
    [014] [014] FIGURE 4 is a front view of the battery operated hair dryer of FIGURE 1;
    [015] [015] FIGURE 5 is a sectional view of the battery operated hair dryer of FIGURE 1, taken generally along line 5-5 in FIGURE 4;
    [016] [016] FIGURE 6 is a view in detail taken generally along line 6-6 in FIGURE 5, showing a ring of light and an exit grid;
    [017] [017] FIGURE 7 is a perspective view of an embodiment of a heating set according to the invention;
    [018] [018] FIGURE 8 is another perspective view of the heating assembly of FIGURE 6;
    [019] [019] FIGURE 9 is an exploded perspective view of the heating assembly of FIGURE 6;
    [020] [020] FIGURE 10 is a perspective view of the heating assembly of FIGURE 6 with a duct removed so that the heating coil is visible;
    [021] [021] FIGURE 11 is another perspective view of the heating assembly of FIGURE 6 with the duct removed so that the heating coil is visible;
    [022] [022] FIGURE 12 is a perspective view of an embodiment of a battery pack according to the invention;
    [023] [023] FIGURE 13 is another perspective view of the FIRE 11 battery;
    [024] [024] FIGURE 14 is a perspective view of an embodiment of battery cells, a battery management module and a switch module according to the invention;
    [025] [025] FIGURE 15 is a front view of an embodiment of a battery operated hair dryer according to the invention;
    [026] [026] FIGURE 16 is a side sectional view of the battery operated hair dryer of FIGURE 15, generally taken along line 16-16 in FIGURE 15;
    [027] [027] FIGURE 17 is a perspective view of an embodiment of a heating module for the battery operated hair dryer of FIGURE 14; and FIGURE 18 is another perspective view of the heating module of FIGURE 15. DETAILED DESCRIPTION
    [028] [028] Referring now to the figures in the drawing, the invention provides a battery operated hair dryer 10. The hair dryer 10 includes a main cabinet 20 that wraps all the components of the hair dryer. FIGURES 1-2 show the hair dryer 10 resting on an optional storage cradle 12, which provides support for the hair dryer when not in use, allowing the hair dryer to occupy a minimal amount of counter space. In some embodiments, the storage cradle 12 can also supply power to the hair dryer 10 when the hair dryer is stored in the storage cradle.
    [029] [029] The hair dryer 10 includes three closed subsystems in the main compartment 20 that allow the dryer to function: (1) a battery pack 16, (2) a battery management and control module 40 and (3) a set heating element 50. As shown in the exploded view of FIGURE 3, main cabinet 20 defines a cabinet that encloses all components of the hair dryer 10. In general, the battery pack assembly 16 is located in the lower section 32 of the main cabinet 20. In the embodiment shown, part of the battery pack assembly 16 is also located in an intermediate section 42, which also includes control switches 44 and a battery indicator 38. The heating pack 50 is located in the section upper 52 of the main housing 20. The heating assembly 50 includes at least one heating element 54, at least one fan 56 and other components which will be described in detail below. In the shown embodiment, the battery management and control module 40 is substantially disposed between the upper section 52 and the intermediate section 42. In the shown embodiment, the battery management and control module 40 comprises a printed circuit board which creates a physical barrier between the upper section 52 and the intermediate section 42. Although the battery management and control module 40 creates a barrier between the upper section 52 and the intermediate section 42 in the present embodiment, others means of separating the upper section and the intermediate section can be used alternatively without departing from the invention. In some embodiments, it may also be desirable to direct air through intermediate section 42 and lower section 32 to improve battery performance or for any other purpose.
    [030] [030] Continuing with FIGURE 3, main cabinet 20 includes a base 22, an outlet 25 (see FIGURE 1), an outlet cover 24, a ring of light 26, an outlet grid 28, an retention 30 and a rear cover 33. An optional cable 34 is also shown that can be molded onto the rear cover 33 or otherwise attached to the rear cover. In the shown embodiment, the cable 34 is made of silicone, but any suitable material can be used without departing from the invention. The handle 34 provides a non-slip surface that helps the user to hold the hair dryer 10 firmly, particularly with wet hands. Also attached to the rear cover 33 is a flexible cover of switch 36. In the embodiment shown, the cover of switch 36 is made of a single piece of flexible material. Alternative embodiments can include different switch covers or switch configurations without departing from the invention. In the shown embodiment, a battery indicator 38 is located below the flexible cover of the switch 36 (see FIGURE 14). Obviously, the battery indicator 38 can be located in any other suitable location without departing from the invention. The battery indicator 38 displays the charge level of the battery pack assembly 16. The battery indicator 38 can display the charge in any suitable manner without departing from the invention. For example, in some embodiments, the battery indicator 38 may change color depending on whether the battery is being charged or the battery charge is low. In other embodiments, the battery indicator 38 may consist of several LEDs that light selectively, depending on the level of charge.
    [031] [031] Now returning to FIGURES 4-5, the packaging of the internal components of the battery operated hair dryer 10 is shown. As shown, the heating set 50 is included within the upper section 52. The power switches control 44 and part of the battery pack assembly 16 are included in the intermediate section 42. The battery management and control module 40 is included between the upper section 52 and the intermediate section 42. Final-
    [032] [032] FIGURE 6 is a detailed section view showing the positioning of the light ring 26 in relation to the outlet 25 and the retaining ring 30. In the shown embodiment, the retaining ring 30 is pluggable at the outlet 25, but any suitable fastening means can be used without departing from the invention. The ring of light 26 includes a plurality of light-emitting diodes (LEDs) 25 distributed around the ring. The ring of light 26 can be selectively illuminated while the battery operated hair dryer is in operation or at any other desired time. In some embodiments, LED'd 25 may be able to produce a variety of desired colors and may also be able to selectively flash or otherwise illuminate in any desired configuration. In a preferred embodiment, the ring of light 26 may light up in red when the hair dryer 10 is in operation and is heating the air.
    [033] [033] Now returning to FIGURES 7-11, an embodiment of a heating assembly 50 is shown. The heating set 50 includes a heating element 54, a fan 56, fan compartment 58, duct 60, duct support guides 62, intake 64 and an engine 66. The heating set 50 is arranged within the section upper 52 of the main cabinet 20. In the embodiment shown, the heating element 54 is a resistive heating coil, but any suitable heating element can be used without departing from the invention. Motor 66 is a three-phase brushless motor, which is a very energy efficient motor, has reduced vibration compared to other motors, and the motor speed can be accurately modulated between 0-100% to optimize performance and energy consumption as needed.
    [034] [034] When the air is moved through the fan 56, the fan induces a whirlwind (also called vortexes) in the air flow. The vortex does not improve the performance of the fan 56, but it consumes energy. It is therefore desirable to "de-whirl" the air after passing through the fan 56, as this improves the efficiency of the fan. To "de-whirl" the flow, a plurality of stator vanes 57 are included in the fan compartment 58 and in the duct 60. The stator vanes 57 rectify the air leaving the fan 56 and direct it to the heating element 54. In addition to the vanes of the stator 57, the duct 60 also includes duct support guides 62, which further prevent the vortex air through duct 60. In some embodiments, it may be desirable to have only stator vanes 57 without duct support guides 62 or vice versa. In addition, alternative embodiments can do away with the stator vanes 57 and duct support guides 62 without departing from the invention.
    [035] [035] In the embodiment shown, the battery management and control module 40 is positioned between the battery set 16 and the heating set 50. The battery management and control module 40 includes at least one microprocessor 46 and a storage device 48. The battery management and control module 40 includes a battery management system 68 (BMS) that balances the voltage between the cells of the battery 18 and controls the charging and discharging of the set of the battery pack 16. In addition, the BMS 68 continuously measures the voltage of each cell of the battery 18. To achieve the desired balance, the BMS 68 monitors the temperature of each cell of the battery 18 using a plurality of temperature sensors 70 which are strategically placed throughout the battery pack 16. The BMS 68 takes the temperature information provided by the temperature sensors 70 e, combined with the t measurements each cell, determines the condition of the battery pack 16 in terms of state of charge and state of health. The state of charge is measured as a percentage, from zero to 100%, while the state of health measures the amount of recoverable capacity that the set of battery pack 16 has in comparison with its condition of early life. It is well known in the art that a battery's ability to hold a charge decreases over time. The BMS 68 analyzes the charge status and health status information before deciding how much safe and permitted current can be discharged or charged at any time to ensure that the battery pack assembly 16 remains within its degradation limits and / or expected useful life.
    [036] [036] If the voltage varies between battery cells 18, the BMS performs a balancing function, controlling the discharge path through any battery cell to eliminate the extra charge. By continuously performing the aforementioned balancing function, the BMS 68 ensures that the cells of the battery 18 remain balanced throughout the life of the battery pack 16.
    [037] [037] In addition to balancing the cells of the battery 18, as described above, the BMS 68 also controls the charging and discharging of the battery pack assembly 16, so that it is carried out in a controlled and safe manner. Charging and discharging the battery pack assembly 16 and similar batteries presents numerous safety concerns. For example, the uncontrolled charge of the battery pack 16 can result in an overvoltage condition in one or more cells of the battery 18 which can result in overheating or fire in extreme cases. At the opposite end of the spectrum, the uncontrolled discharge of the battery pack 16 is also problematic. Uncontrolled discharge from the battery pack 16 can result in an undervoltage condition which, in itself, is not dangerous. However,
    [038] [038] In some embodiments of the hair dryer 10, the BMS 68 "knows" how much energy is present in the battery pack 16 and can adjust and modify the heating and blowing profile of the hair dryer to ensure that the dryer works properly. ideal, given the amount of charge present in the battery. Obviously, the BMS 68 can adjust the performance of the hair dryer 10 in any other desired way without departing from the invention.
    [039] [039] FIGURES 12 and 13 show the battery pack 16 in more detail. In the embodiment shown, the battery pack set 16 is a rechargeable lithium-ion battery comprising eight (8) individual battery cells 18. The battery pack set 16 is electrically connected to the management and control module battery pack 40, which controls how electricity is extracted from the battery pack assembly 16, as well as the battery pack is charged. Of course, alternative embodiments of the battery pack assembly 16 may include more or less cells from the battery pack 18 in any suitable configuration and may also use any suitable battery type without departing from the invention.
    [040] [040] Each battery cell 18 includes two terminals 19, which extend from one end of each battery cell. In the shown embodiment, terminals 19 extend through the grooves in terminal 72 on a terminal consolidation plate 74. In the embodiment shown, terminal consolidation plate 74 is a printed circuit board, but any suitable substrate can be used without departing from the invention. The terminals 19 are in electrical contact with the terminal slots 72, which allow the movement of the terminals 19 due to any expansion or contraction of the battery cells 18. The consolidation plate of the terminal 74 electrically combines the cells of the battery 18 inside of the battery pack assembly 16, which minimizes the necessary connections between the battery pack assembly 16 and the BMS 68. In the embodiment shown, the battery pack 16 includes two terminal consolidation plates 74, 75, which are electrically connected to each other. In the embodiment shown, the battery pack 16 is electrically connected to BMS 68. Finally, the battery pack 16 even includes a power port 76, into which a user can insert a power cord 78 to charge the pack battery as needed. The charging port 76 can be any suitable port, including, but not limited to, a USB port.
    [041] [041] In an alternative embodiment, the battery pack assembly 16 may be capable of wireless or inductive charging, eliminating the need for charging port 76. In yet another alternative embodiment, the battery-operated hair dryer can include at least one solar cell, which would use solar energy to charge the battery pack 16. Solar charging would be particularly advantageous if hair dryer 10 were used where there is no access to a power source, such as a camping. In an alternative embodiment, it may also be possible to use the battery pack 16 to supply power to other devices, such as a user's cell phone, similarly to other supplementary battery packs that are well known in the art.
    [042] [042] In addition to balancing the charge on the cells of the battery 18, the
    [043] [043] The battery management and control module 40 is a necessary component to allow the use of batteries to power a hairdryer. As a result, the presence of an intelligent control module opens up the possibilities of what can be done with a hairdryer. In some embodiments of the battery operated hair dryer 10, for example, temperature sensors 80 (See FIGURES 3 and 5) can be included near inlet 64 and near outlet 25. Temperature sensors 80 measure the temperature. room temperature and can compare this data with the temperature of the air leaving the hairdryer 10. Depending on the difference in air temperature at inlet 64 and outlet 25, the battery management and control module 40 can optimize the quantity current flowing through the heating element 54 or you can adjust the fan speed 56 as desired.
    [044] [044] The battery operated hair dryer 10 can include additional environmental sensors, including, but not limited to, humidity sensors, an infrared thermometer to measure hair or skin temperature or any other desired sensor. In addition, additional components can be included in the hair dryer 10 and connected to the battery management and control module
    [045] [045] In some embodiments of the battery operated hair dryer 10, a microphone and a speaker can be included in compartment 20. The microphone and speaker can be used for any purpose, including but not limited to sound production to actively cancel the noise produced by the hair dryer 10. To cancel the noise produced by the hair dryer 10, the microphone picks up the noise produced by the hair dryer. Then, the battery management and control module 40 creates a noise cancellation wave that is 180 ° out of phase with the noise produced by the hairdryer. The noise cancellation wave effectively cancels the noise from the hair dryer 10, greatly improving the user experience. In addition to using the loudspeaker to produce the noise cancellation wave, the loudspeaker can also be used to play music or make any other desired sound.
    [046] [046] Turning now to FIGURES 15-18, an alternative embodiment of a battery-powered hair dryer 200 according to the invention is shown. The battery operated hair dryer 200 is similar in many respects to the embodiment described above, except that the battery operated hair dryer 200 includes a heating set 210 that heats the air using at least one peltier 212 device instead of a resistive heater. Peltier devices, also known as thermoelectric generators, are well known in the art. Peltier devices comprise a matrix of alternating n and p type semiconductors. The element matrix is welded between two ceramic plates, electrically in series and thermally in parallel. When a current passes through one or more pairs of elements from type n to type p, there is a decrease in temperature at the junction (the "cold side"), resulting in the absorption of heat from the environment. This heat is carried by the elements through electron transport and is released on the opposite side ("hot") as the electrons move from a high energy state downwards. Typical single-stage Peltier devices are capable of producing temperature differences between the hot and cold sides of about 70 degrees Celsius (158 degrees Fahrenheit).
    [047] [047] In the embodiment shown in FIGURES 15-18, Peltier 212 devices each have a hot side 214 and a cold side 216. A plurality of heat sinks 218 are thermally connected to Peltier 212 devices. Upstream of the heating assembly 210 is a motor 220 connected to a fan 221 that blows air over and through the heating assembly. Immediately downstream of heating set 210, an outlet duct 222 channels the heated air that has passed through the heating set 210 towards and out of outlet grid 28. The air that passes around the set of heating heating 210 is cooled as it passes through the heat sinks 218. Cold air cannot escape from the hair dryer 200 through outlet grille 28 because it is blocked by outlet duct 222. Instead, the cooled air is directed to another location and can be directed to the battery pack 16 to assist in cooling the battery pack. Of course, alternative configurations of Peltier devices and heat sinks can be used without departing from the invention.
    权利要求:
    Claims (15)
    [1]
    1. Hair dryer, characterized by the fact that it comprises: a cabinet a set of rechargeable battery, including at least one cell of lithium ion battery, the set of rechargeable battery arranged inside the compartment; each battery cell with a discharge path; each battery cell with a recoverable charging capacity at the beginning of its useful life and a recoverable charging capacity in use; each battery cell also has a state of charge, the state of charge measured as a percentage of the recoverable charge capacity; each battery cell also has a state of health, the state of health determined by comparing the recoverable charge capacity in use to the beginning of the useful life of the recoverable charge capacity; a plurality of temperature sensors that detect the temperature for each battery cell; a plurality of voltage sensors that measure the voltage for each battery cell; the battery electrically connected to a battery management and control module; at least one switch to control the operation of the hair dryer; a heating set arranged inside the compartment, the heating set including a fan connected to a motor and at least one heating element, in which the motor turns the fan, which pulls the ambient air into an inlet and expels the air through an exit; the heating element positioned so that the air passing through the heating assembly can be heated to a temperature higher than the temperature of the ambient air; the battery management and control module electrically connected to at least one fan and at least one heating element, where the battery management and control module adjusts an electrical current supplied from the battery pack to the fan and element heating to optimize the drying performance of the hair dryer and the performance of the battery pack; the battery management and control module, including at least one microprocessor and at least one storage device; and the battery management and control module capable of measuring the temperature and voltage of each cell in the battery to determine the state of charge and the health of each cell in the battery and balance the load between the plurality of cells in the battery. battery by controlling the discharge path in any of the battery cells to purge the extra charge.
    [2]
    2. Hair dryer according to claim 1, characterized by the fact that the battery includes a plurality of battery cells.
    [3]
    3. Hair dryer according to claim 1, characterized by the fact that the heating element is a resistive heating coil.
    [4]
    4. The hair dryer, according to claim 1, characterized by the fact that the motor is a brushless three-phase electric motor.
    [5]
    5. The hair dryer according to claim 1,
    characterized by the fact that the heating set also includes a plurality of stator blades positioned close to the fan that straighten the air flow through the heating set.
    [6]
    6. Hair dryer, according to claim 1, characterized by the fact that the battery management and control module is housed in a printed circuit board that is located inside this compartment, in order to separate the set battery heater.
    [7]
    7. Hair dryer, according to claim 1, characterized by the fact that it also includes a battery indicator that requires a charge status of the battery pack.
    [8]
    8. Hair dryer, according to claim 1, characterized by the fact that it also includes a ring of light located close to the exit, characterized by the fact that the ring of light comprises at least one LED.
    [9]
    9. Hair dryer according to claim 1, characterized by the fact that the battery management and control module adjusts the fan speed and the amount of current fed to the heating element based on the temperature of the battery cells .
    [10]
    10. Hair dryer, according to claim 9, characterized by the fact that the battery management and control module balances the charge of the battery cells based on the temperature of the battery cells.
    [11]
    11. Hair dryer according to claim 1, characterized by the fact that the battery cell includes two terminals.
    [12]
    12. Hair dryer according to claim 11, characterized by the fact that each terminal is electrically connected to a terminal consolidation plate.
    [13]
    13. Hair dryer according to claim 12,
    characterized by the fact that each terminal extends through a corresponding slot in a terminal consolidation plate.
    [14]
    14. Hair dryer according to claim 13, characterized by the fact that the terminal consolidation plate is electrically connected to the battery management and control module.
    [15]
    15. Hair dryer, characterized by the fact that it comprises: a cabinet, the cabinet including an air inlet and an air outlet; a rechargeable battery pack, including at least one lithium-ion battery cell, the rechargeable battery pack disposed within the compartment; each battery cell with a discharge path; each battery cell with a recoverable charging capacity at the beginning of its useful life and a recoverable charging capacity in use; each battery cell also has a state of charge, the state of charge measured as a percentage of the recoverable charge capacity; each battery cell also has a state of health, the state of health determined by comparing the recoverable charge capacity in use to the beginning of the useful life of the recoverable charge capacity; each battery cell, including two terminals, each terminal electrically connected to a terminal consolidation plate; a plurality of temperature sensors that detect a temperature in each battery cell; a plurality of voltage sensors that measure the voltage
    are for each battery cell; a battery management and control module with at least one microprocessor and at least one storage device, the battery management and control module electrically connected to the battery pack; the battery management and control module capable of balancing the charge between the plurality of battery cells controlling the discharge path through any one of the battery cells to purge the extra charge based on information received from the temperature sensors and voltage sensors; at least one switch to control the operation of the hair dryer; a heating set arranged inside the compartment, the heating set including a fan connected to a motor and at least one heating element, in which the motor turns the fan, which pulls the ambient air into the air intake and expels the air through the air outlet; the battery management and control module positioned in the cabinet in order to separate the heating element from the battery; the heating element positioned so that the air passing through the heating assembly can be heated to a temperature higher than the temperature of the ambient air; the battery management and control module electrically connected to at least one fan and at least one heating element; a battery indicator that shows the battery charge status; a ring of light located near the air outlet, comprising at least one LED;
    at least one drying profile stored in the storage device; and the battery management and control module capable of adjusting the electric current supplied from the battery to the fan and delivered to the heating element according to the drying profile to adjust the amount and temperature of heated air expelled from the hair dryer. during a drying cycle.
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    PH12019500701A1|2019-11-25|
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    CA3081246A1|2019-05-16|
    WO2019094064A1|2019-05-16|
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    法律状态:
    2021-12-07| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US201762584528P| true| 2017-11-10|2017-11-10|
    US62/584,528|2017-11-10|
    PCT/US2018/027435|WO2019094064A1|2017-11-10|2018-04-13|Battery operated hair dryer|
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