Patent Publication Number: US-2022228596-A1

Title: Bladeless fan

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a U. S. patent application which claims the priority and benefit of Chinese Patent Application Number 202120149745.X, filed on Jan. 20, 2021, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The disclosure relates to the technical field of fans, and in particular to a bladeless fan. 
     BACKGROUND ART 
     A bladeless fan is also called an air multiplier, because it has no blades, dust will not be covered on the blades, and it can also prevent people&#39;s fingers from being hurt. An existing bladeless fan usually can&#39;t adapt to an uneven placement surface, and it is easy to be tipped on the uneven placement surface. 
     SUMMARY 
     An object of the disclosure is to provide a bladeless fan, aiming at solving a problem that the bladeless fan is easy to be tipped on the uneven placing surface. 
     The disclosure is realized as follows. 
     A bladeless fan is provided, which includes a fan body and at least three telescopic brackets. 
     The fan body includes a base. A plurality of guide members are installed inside the base, each guide member is correspondingly arranged to each telescopic bracket. The guide member is fixed to the base, the guide member is provided with a through channel, a bottom of the base is defined with a through hole communicated with the through channel, the through channel is arranged along a height direction of the base, and an inner wall of the through channel is provided with a rubber layer. The telescopic bracket includes a support and a handgrip connected with the support, and the base is provided with a guide groove. The guide groove is arranged along the height direction of the base, the handgrip is inserted into the guide groove and can be moved relative to the guide groove, the support is installed in the through channel, is in contact with the rubber layer, and can relatively slide along the through channel and the through hole. 
     In a specific embodiment: 
     The bladeless fan further includes a first temperature sensor, an electric heating device, a second power supply device, a second temperature sensor and a controller. 
     The second power supply device is electrically connected with the electric heating device, the electric heating device is arranged in the fan body and is configured to heat wind blown out by the fan body, the first temperature sensor is in signal connection with the controller, the first temperature sensor is configured to detect an ambient temperature and transmit information on the ambient temperature to the controller, and the controller is configured to receive the information on the ambient temperature and control the second power supply device to supply or cut off power to the electric heating device according to the information on the ambient temperature, so as to control an operation state of the electric heating device. 
     The second temperature sensor is in signal connection with the controller. The second temperature sensor is configured to detect a temperature of the electric heating device and transmit information on the temperature of the electric heating device to the controller. The controller is configured to receive the information on the temperature of the electric heating device and control the second power supply device to supply or cut off power to the electric heating device according to the information on the temperature of the electric heating device, so as to control the operation state of the electric heating device. 
     In a specific embodiment: 
     The fan body further includes a handpiece mounted on the base, and the bladeless fan further includes a power mechanism. The base is provided with an accommodating cavity for accommodating the power mechanism, and the accommodating cavity is communicated with the handpiece. The power mechanism is mounted in the accommodating cavity, and an airflow generated by the power mechanism can be ejected through the handpiece. 
     In a specific embodiment, the bladeless fan further includes a trigger unit, which is provided in the fan body and electrically connected with the controller. The trigger unit is configured to detect whether the bladeless fan is operated, and the controller is configured to control an operation state of the power mechanism when the bladeless fan is operated. 
     In a specific embodiment: 
     The trigger unit includes a trigger button provided on the fan body, the trigger button is configured to detect whether the trigger button is pressed or not, and the controller is configured to control the operation state of the power mechanism when the trigger button is pressed. 
     In a specific embodiment, the trigger unit includes a touch element which is provided on the fan body, the touch element is configured to detect whether the touch element is touched, and the controller is configured to control the operation state of the power mechanism when the touch element is touched. 
     In a specific embodiment, the electric heating device is installed inside the handpiece and disposed at an air outlet of the handpiece. 
     In a specific embodiment, the bladeless fan further includes a prompter which is electrically connected with the controller, and the controller is configured to control an operation state of the prompter according to the operation state of the power mechanism and the operation state of the electric heating device. 
     In a specific embodiment, the bladeless fan is also installed with a Bluetooth module, and the Bluetooth module is in signal connection with the controller. 
     In a specific embodiment, the handgrip is rod-shaped, the support is rod-shaped, and an axis of the handgrip is perpendicular to an axis of the support. 
     The disclosure at least includes following beneficial effects. 
     In this bladeless fan, the base is provided with the guide groove, and when a force is applied to the handgrip, the handgrip can be moved relative to the guide groove. The base is internally provide with a plurality of guide members each provided with a through channel, moving of the handgrip drives the support to move along the through channel. Because the through channel is arranged along the height direction of the base, the support can move along the height direction of the base, the inner wall of the through channel is provided with a rubber layer, and a friction can be generated when the support slides, and only when the force is large enough can the support slides out of the through channel and the through hole, so that the support can extend out and support the base. When no force is applied, the support cannot slide relative to the guide member because of blocking of the rubber layer to the support, thus ensuring that the support does not slide freely when supporting the base after the support slides out of the through channel and the through hole, and ensuring stability of the supporting. Each telescopic bracket corresponds to one guide member, so that a telescopic height of each telescopic bracket can be independently controlled. When a placing surface of the base is uneven, the base can be stable relative to a horizontal plane by adjusting the telescopic height of each telescopic bracket, and it is not easy to be tipped on the uneven placing surface. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to illustrate technical schemes of implementations of this disclosure more clearly, the following drawings used in the implementations will be briefly introduced; it should be understood that the following drawings only show some embodiments of this disclosure, therefore they should not be regarded as a limiting of the protection scope; and other related drawings can be obtained according to these ones without creative effort for ordinary skilled in the art. 
         FIG. 1  is a schematic diagram of an overall structure of a bladeless fan according to an embodiment of the present disclosure; 
         FIG. 2  is a sectional view of the telescopic bracket and base in a first state according to an embodiment of the present disclosure; 
         FIG. 3  is a sectional view of the telescopic bracket and base in a second state according to an embodiment of the present disclosure; 
         FIG. 4  is a schematic diagram of a first functional module of the bladeless fan according to an embodiment of the present disclosure; 
         FIG. 5  is a schematic diagram of a second functional module of the bladeless fan according to an embodiment of the present disclosure; 
         FIG. 6  is a schematic diagram of a third functional module of the bladeless fan according to an embodiment of the present disclosure; and 
         FIG. 7  is a schematic diagram of a fourth functional module of the bladeless fan according to an embodiment of the present disclosure. 
     
    
    
     Reference Number:  10 —Bladeless Fan;  100 —Fan Body;  110 —Base;  111 —Guide Groove;  112 —Through Hole;  113 —Accommodating Cavity;  120 —handpiece;  210 —First Temperature Sensor;  220 —Electric Heating Device;  230 —Second Power Supply Device;  240 —Second Temperature Sensor;  250 —Controller;  260 —Power Mechanism;  270 —Trigger Unit;  280 —Prompter;  281 —Second Control Switch;  290 —Bluetooth Module;  310 —Telescopic BrackeT;  311 —Support;  312 —Handgrip;  320 —Guide Member;  321 —Through Passage;  322 —Rubber Layer. 
     DETAILED DESCRIPTION 
     In order to make the purposes, technical schemes and advantages of implementations of this disclosure more clear, the technical schemes in the implementations of this disclosure will be described clearly and completely with reference to the drawings in the implementations of this disclosure; and it is obvious that the described implementations are part of the implementations of this disclosure, but not all of them. 
     In addition, the terms “first” and “second” are only configured for descriptive purposes and cannot be understood as indicating or implying a relative importance, or implicitly indicating a number of indicated technical features. In the present disclosure, unless otherwise specified and limited, terms “installation”, “connection”, “installation” and other terms should be broadly understood. 
     Embodiments 
     This embodiment provides a bladeless fan  10 . Reference is made to  FIG. 1 , which shows a schematic diagram of an overall structure of the bladeless fan  10 . 
     The bladeless fan  10  includes a fan body  100 , a power mechanism  260 , a first temperature sensor  210 , an electric heating device  220 , a second power supply device  230 , a second temperature sensor  240 , a controller  250  and at least three telescopic brackets  310 . The fan body  100  includes a base  110  and a handpiece  120  installed on the base  110 . The base  110  is provided with an accommodating cavity  113 , and the power mechanism  260  is installed in the accommodating cavity  113 . The handpiece  120  is annular with blowing channels therein, and blowing ports are opened along a circumferential direction of the handpiece  120 . An air flow generated by the power mechanism  260  flows through the blowing channels to blow out of the blowing ports to form an annular air flow. 
     In addition, referring to  FIG. 2  and  FIG. 3 , a plurality of guide members  320  are installed inside the base  110 , that is, the guide members  320  are all installed in the accommodating cavities  113 , and the guide members  320  are fixed in the receiving cavities  113  in the base  110 . In this embodiment, there are at least three telescopic brackets  310  provided, and a number of guide members  320  is the same as that of the telescopic brackets  310 , and each of the guide members  320  is correspondingly arranged to each of the telescopic brackets  310 . 
     The guide member  320  is defined with a through channel  321 , a bottom of the base  110  is provided with a through hole  112  communicating with the through channel  321 . The through channel  321  is arranged along a height direction of the base  110 , an inner wall of the through channel  321  is provided with a rubber layer  322 . The telescopic bracket  310  includes a support member  311  and a handgrip  312  connected with the support member  311 , and the base  110  is provided with a guide groove  111 . The guide groove  111  is arranged along the height direction of the base  110 , the handgrip  312  is inserted into the guide groove  111  and can be moved relative to the guide groove  111 , the support  311  is installed in the through channel  321 , and the support  311  can relatively slide along the through channel  321  and the through hole  112 , and the support  311  is in contact with the rubber layer  322 . 
     When a force is applied to the handgrip  312 , the handgrip  312  can be moved relative to the guide groove  111 , that is to say, the handgrip  312  moves along the height direction of the base  110 , and moving of the handgrip  312  drives the support member  311  to move along the through channel  321 . Since the through channel  321  is also arranged along the height direction of the base  110 , the support member  311  can also move along the height direction of the base  110 . In this embodiment, the handgrip  312  is rod-shaped, the support  311  is rod-shaped, and an axis of the handgrip  312  is perpendicular to an axis of the support  311 . This arrangement makes it more convenient to apply a force to the handgrip  312 . 
     Because the rubber layer  322  is arranged on the inner wall of the through channel  321 , and a friction can be generated when the support  311  slides, and only when the force is large enough can the support  311  slides out of the through channel  321  and the through hole  112 , so that the support  311  can extend out and support the base  110 . When no force is applied, the support  311  cannot slide relative to the guide member  320  because of elasticity of the rubber layer  322  and its blocking to the support  311 , thus ensuring that the support  311  does not slide freely when supporting the base  110  after the support  311  slides out of the through channel  321  and the through hole  112 , and ensuring stability of the supporting. 
     Each telescopic bracket  310  corresponds to one guide member  320 , so that a telescopic height of each telescopic bracket  310  can be independently controlled. When a placing surface of the base  110  is uneven, the base  110  can be stable relative to a horizontal plane by adjusting the telescopic height of each telescopic bracket  310 . In addition, when the telescopic bracket  310  supports the base  110 , it is also beneficial for the base  110  of the bladeless fan  10  to dissipate heat. In addition, there are at least three telescopic brackets  310  in this embodiment, for example, three, four or five, etc. 
     In this embodiment, the power mechanism  260  includes an electric motor and a first power supply device electrically connected with the electric motor. The electric motor sucks air into the base  110  and encircles it in the handpiece  120 . An encircling force of the electric motor drives the air near the handpiece  120  to enter the handpiece  120  and injects it out through an air outlet at a high speed. The second power supply device  230  is electrically connected with the electric heating device  220 , which is arranged in the fan body  100  and configured for heating wind blown by the fan body  100 . In this embodiment, the electric heating device  220  is arranged inside the handpiece  120  and located at the air outlet of the handpiece  120 , so the wind blown out through the air outlet can be heated by the electric heating device  220  and then become hot air blowed. 
     The first temperature sensor  210  is in signal connection with the controller  250 . The first temperature sensor  210  is configured for detecting an ambient temperature and transmitting information on the ambient temperature to the controller  250 . The controller  250  is configured for receiving the information on the ambient temperature and controlling the second power supply device  230  to supply or cut off power to the electric heating device  220  according to the information on the ambient temperature, thereby controlling an operation state of the electric heating device  220 . The controller  250  can be chosen to be a PC or PLC programming controller. 
     Referring to  FIG. 2 , in this embodiment, the first temperature sensor  210  detects an external temperature and transmits the information on the ambient temperature to the controller  250 . The controller  250  receives the information on the ambient temperature and determines whether it is lower than a preset value. If it is lower than the preset value, the controller  250  controls the second power supply device  230  to supply power to the electric heating device  220 , which heats the air in an air blowing channel and blows hot air out of the air outlet. If the controller  250  determines that the ambient temperature is higher than the preset value, the controller  250  controls the second power supply device  230  to cut off the power and not to supply the power to the electric heating device  220 , so that the air blown out of the air outlet is at a normal temperature and has not been heated. 
     The second temperature sensor  240  is in signal connection with the controller  250 . The second temperature sensor  240  is configured for detecting a temperature of the electric heating device  220  and transmitting information on the temperature of the electric heating device  220  to the controller  250 . The controller  250  is configured for receiving the information on the temperature of the electric heating device  220  and controlling the second power supply device  230  to supply or cut off power to the electric heating device  220  according to the information on the temperature of the electric heating device  220 , thereby controlling the operation state of the electric heating device  220 . 
     If it is in a hot air mode for a long time, that is, the electric heating device  220  is in the operation state for a long time, the electric heating device  220  may be overheated, and the electric heating device  220  transfers heat to a casing of the fan body  100  inside the fan body  100 , thus causing the casing of the bladeless fan  10  to be overheated. 
     The second temperature sensor  240  can detect the temperature of the electric heating device  220  and transmit the temperature to the controller  250 . The controller  250  receives the information on the temperature and determines whether the temperature exceeds the preset value. If it exceeds the preset value, the controller  250  controls the second power supply device  230  to cut off the power to the electric heating device  220 , thus avoiding the overheating of the casing of the bladeless fan  10 . If the preset value is not exceeded, the second power supply device  230  is kept to supply the power to the electric heating device. 
     Further, referring to  FIG. 3 , in this embodiment, the bladeless fan  10  further includes a trigger unit  270 , which is arranged in the fan body  100  and electrically connected with the controller  250 . The trigger unit  270  is configured to detect whether the bladeless fan  10  is operated, and the controller  250  is configured to control an operation state of the power mechanism  260  when the bladeless fan  10  is operated. 
     When the trigger unit  270  is operated, the controller  250  controls the operation state of the power mechanism  260 . Specifically, the controller  250  controls the operation state of the power mechanism  260  by controlling the first power supply device to supply or cut off the power to the electric motor. Specifically, the trigger unit  270  of this embodiment can be a trigger button or a touch element. The trigger button has a pressure element, the touch button is installed on the fan body  100 , the pressure element in the touch button can detect whether the trigger button is pressed or not, and the controller  250  is configured to control the operation state of the power mechanism when the trigger button is pressed. The touch element can be a capacitive sensor, and the touch element is arranged on the fan body and is configured to detect whether the touch element is touched, and the controller  250  is configured to control the operation state of the power mechanism when the touch element is touched. 
     Optionally, a Bluetooth module  290  can be installed in the bladeless fan  10 , and the Bluetooth module  290  is in signal connection with the controller  250 . Referring to  FIG. 4 , the Bluetooth module  290  can be in signal connection with a mobile phone APP, so that the controller  250  can be instructed to control an operation state of the fan through the mobile phone APP, for example, to control the blowing and air volume of the bladeless fan  10 . 
     Further, in order to conveniently know whether the bladeless fan  10  is blowing hot air, the bladeless fan  10  of this embodiment further includes a prompter  280  electrically connected with the controller  250 , and the controller  250  is configured to control the operation state of the prompter  280  according to the operation state of the power mechanism  260  and the operation state of the electric heating device  220 . The operation state of the electric heating device  220  is determined by whether the second power supply device  230  supplies the power to the electric heating device  220 . 
     That is, if the power mechanism  260  and the electric heating device  220  operate together, it indicates that it is blowing the hot air, and if the power mechanism  260  operates alone and the electric heating device  220  does not operate, it indicates that it is blowing normal air. 
     Referring to  FIG. 5 , a second control switch  281  can also be installed on the prompter  280  electrically connected with the second control switch  281 , and the second control switch  281  is electrically connected with the controller  250 . When both the power mechanism  260  and the electric heating device  220  are not in operation, the controller  250  controls the second control switch  281  to turn off, and when the power mechanism  260  is in operation, the controller  250  controls the second control switch  281  to turn on, so that the prompter  280  can emit sound or light. 
     The above is only specific implementations of the present disclosure, and is not intended to limit this disclosure, and modifications and variations can be made in this disclosure for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of this disclosure shall be encompassed within the protection scope of this disclosure.