JP2014090814A - Hand dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand dryer capable of eliminating temperature unevenness of air jetted out from a blowout nozzle.SOLUTION: The hand dryer that blows air to the hands of a user for drying comprises: a body box having air flow generation means in the inside for generating an air flow; a blowout nozzle for blowing the air flow to the hands; an air flow passage communicating the air flow generation means and the blowout nozzle; heating means for heating the air flow; and a power supply for feeding power to the heating means. The heating means includes: a heat generation part provided in the air flow passage from one side to the other side in the left/right direction in front view; and a connecting terminal that protrudes from the heat generation part and receives the power feed from the power supply. In front view, the entire connecting terminal is stored between a virtual vertical line passing through a left end of the heat generation part and a virtual vertical line passing through the right end thereof.

Description

  An aspect of the present invention relates to a hand drying device that blows air on a user's hand to dry the hand.

  In recent years, especially in public toilets and the like, there is an increasing tendency to reduce paper towels for wiping off water adhering to hands after hand washing, and there is an increasing number of cases where hand dryers are installed instead of paper towels. Such a hand-drying device is often installed on the wall surface of a wash counter slightly away from the place where the wash bowl is located, or on the wall surface of a toilet space away from the wash counter (the following patent document) 1).

  In the hand drying device proposed in the following Patent Document 1, when the hand is inserted into the opening recess of the hand drying chamber and the sensor provided in the opening recess detects the hand, the hand drying device is provided above the hand drying chamber. Air pressure heated by the heating means is blown from a plurality of blowing nozzles, and water droplets adhering to the hand are blown off.

JP 2003-275132 A

  However, in the conventional hand-drying apparatus, the connection terminals that receive power from the power supply unit are installed in the left-right direction on the heating means, and the entire left-right direction in the air channel cannot be covered. Therefore, the air ejected from the ejection nozzle located below the connection terminal is ejected while it is cold without being heated. Specifically, as shown in FIGS. 6 and 7, since the connection terminal 220 protrudes in the left-right direction on either the left or right side surface of the heater 208 that is a heating unit, the connection terminal 220 is positioned below the connection terminal 220. The air coming out of the blowing nozzle 210 was not warmed and remained cold. Therefore, there is a problem that the user feels temperature unevenness depending on the position of the blowing nozzle 210. This problem was particularly noticeable in winter and cold regions. In addition, the left-right direction of this specification is the left-right direction when the hand dryer is viewed from the front as shown in FIG.

  This invention is made | formed in view of such a subject, The objective is to provide the hand-drying apparatus which can eliminate the temperature nonuniformity of the air which blows off from a blowing nozzle.

  In order to solve the above problems, a hand drying device according to the present invention is a hand drying device that blows air on a user's hand to dry, and a main body box having air flow generation means for generating an air flow therein. A blowing nozzle that blows the air flow onto the hand, an air flow path that connects the air flow generating means and the blowing nozzle, a heating means that heats the air flow, and a power source that supplies power to the heating means A heating unit provided in the air flow path from one side to the other side in the left-right direction when viewed from the front, and a projection from the power source unit that protrudes from the heating unit. A connection terminal that receives power supply, and the entire connection terminal is located between a virtual vertical line passing through a left end of the heat generating portion and a virtual vertical line passing through a right end in a front view.

  According to the invention configured as described above, by using the conventional connection terminal portion as the heating means, it is possible to reduce temperature unevenness of the air ejected from the ejection nozzle.

  In the present invention, preferably, the connection terminal protrudes from the heat generating portion toward the air generating means.

  According to the invention configured as described above, the connection terminal protrudes from the heat generating portion toward the air generation unit, thereby reducing the distance between the blow-out nozzle and the heating unit, thereby not wasting heat energy and more efficiently. A heated air stream can be sprayed onto the hand, and the user can dry the hand with good warm air.

  In the present invention, preferably, the heat generating part is installed over the entire width in the left-right direction in the air flow path.

  According to the invention thus configured, since the heating means is installed over the entire width in the left-right direction in the air flow path, the air flow is surely applied to the heating means before being ejected from the blowing nozzle. Pass through. Therefore, the air flow warmed by the heating means can be blown from the blow nozzle to the blow hand, and temperature unevenness can be further eliminated.

  According to the aspect of the present invention, there is provided a hand-drying device that does not cause temperature unevenness in the airflow ejected from the blowout nozzle.

The perspective schematic diagram which illustrates the hand-drying apparatus concerning embodiment of this invention (A) Front view of the hand-drying apparatus concerning embodiment of this invention (b) AA sectional drawing of the hand-drying apparatus concerning embodiment of this invention (A) Side view of the hand-drying apparatus concerning embodiment of this invention (b) BB sectional drawing of the hand-drying apparatus concerning embodiment of this invention FIG. 4 is an enlarged view of the vicinity of the heating unit in FIG. 3. The top view of the heating means installed in the blowing nozzle concerning embodiment of this invention Top view of heating means installed on conventional blowout nozzle Front view of conventional heating means

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably. FIG. 1 is a schematic perspective view illustrating a hand dryer according to an embodiment of the invention. As shown in FIG. 1, the hand dryer 100 of this invention is installed in wall surfaces, such as a toilet washroom space of a building, and the hand dryer 100 is installed apart from a floor surface. The main body box 102 constitutes the outline of the hand dryer 100 and is a box that opens to the front of the hand dryer 100 and has the remaining five walls. The upper half of the hand dryer 100 has a front cover 104 on the front side and a water receiving tray 106 on the lower end side of the hand dryer 100. Between the front cover 104 and the water receiving tray 106, a hand drying chamber 110 which is a space opened in front of the main body box 102 is provided. A water receiver 108 is provided at the bottom of the hand drying chamber 110.

  As shown in FIGS. 2 and 3, a functional unit 200 is provided between the front cover 104 and the main body box 102. The functional unit 200 includes a suction port 202 that sucks in external air, a filter 204 that removes dust and dirt in the air, a fan unit 206 that is an air flow generating unit that generates an air flow, and a heating unit that heats the air flow. It is composed of a heater 208 that is a heat generating portion and a connection terminal 220, and has a blow-out nozzle 210 that ejects an air flow. The blowout nozzle 210 has a plurality of nozzle holes 210a, and the warmed air is ejected from the nozzle holes 210a. Note that the width in the left-right direction of the blowout nozzle is from end to end of the nozzle holes 210a arranged in a row, and is the width in the longitudinal direction from which the airflow is jetted. Further, the filter 204 can be removed by pulling a filter handle 204a provided at the upper rear of the hand drying chamber 110, and the filter 204 can be easily cleaned. The fan unit 206 generates an air flow by rotating an impeller with a motor.

  The function unit 200 includes a sensor 212 that is a human body detection unit and a control unit 214. When the sensor 212 detects the user's hand inserted into the hand drying chamber 2, the control unit 214 receiving the detection result of the sensor 212 drives the fan unit 206, and the sensor 212 does not detect the user's hand. Upon receiving the non-detection result of the sensor 212, the control unit 214 stops the fan unit 206. The controller 214 drives / stops the heater 208 in synchronization with the fan unit 206. The fan unit 206 and the heater 208 are driven by the supply of electricity from the power supply unit 218. The control unit 214 and the power supply unit 218 are disposed on the control board 213.

  When the hand is inserted into the hand drying chamber and the sensor 212 detects the hand, the fan unit 206 is activated. Then, air is sucked from the suction port 202. The sucked air passes through the filter 204 and is sucked into the fan unit 206 from the fan unit suction port 202, and the air pressurized inside the fan unit 206 is discharged from the exhaust port of the fan unit 206. The discharged air flow passes through the air flow path 216 guided to the blowout nozzle 210, and a heater 208 provided from one side to the other side in the air flow path 216 in the left-right direction is provided in the middle of the air flow path 216. The air flow is blown out from the blowing nozzle 210 to the hand drying chamber 110. Further, the blow-out nozzle 210 is disposed on the upper front side of the hand drying chamber 110, and the jet angle of the air flow is slightly inclined backward from substantially vertical. Thereby, there exists an effect which suppresses water droplet scattering to a user side.

  As shown in FIGS. 3 and 4, the heater 208 is provided with a connection terminal 220 that receives power from the power supply unit 218, and the entire connection terminal 220 passes through the left end of the heater 208 in the front view of the main body box 102. It is formed so as to fit between a virtual vertical line L and a virtual vertical line R passing through the right end. The virtual vertical line L or R is a virtual straight line extending in the vertical direction from the left end or the right end of the heater 208 in the front view of the main body box 102. Since the connection terminals 220 are not installed in the left-right direction as in the prior art, the heater 208 can be widely installed in the air flow path 216. In the embodiment, the direction of the connection terminal 220 provided on the heater 208 protrudes from the heater 208 toward the fan unit 206, but is not limited thereto, and may be directed to the opposite side. .

  The connection terminal 220 and the power supply unit 218 are electrically connected by a cable 222, and the cable 222 connecting the connection terminal 220 and the power supply unit 218 is connected to the connection terminal 220 in order for the heater 208 to receive power supply from the power supply unit 218. It extends from.

  The heater 208 is a PTC heater. As shown in FIGS. 4 and 5, power is supplied from the power supply unit 218 to the connection terminal 220, and power is supplied to a PTC element (not shown) through the heat exchange fin 224 to generate heat. Of course, power may be directly supplied to the PTC element without using the heat exchange fins 224. The heating means is not limited to the PTC heater alone.

  The heat exchange fin 224 is a heat exchange member that promotes heat exchange between the PTC element and air. The heater 208 is composed of a PTC element and heat exchange fins 224.

  The PTC element is a positive temperature coefficient thermistor that has a self-temperature control function that quickly increases when energized, and when the temperature reaches a predetermined temperature, the electric resistance value rapidly increases to limit current and suppress heat generation.

  The heater 208 is fixed in a casing 226 formed integrally with the blowing nozzle 210. The air flow path 216 is formed by a fan unit case 207 surrounding the fan unit 206 and a casing 226. With such a configuration, the heater 208 is installed in the air flow path 216 and can warm the air flow discharged from the fan unit 206.

  The heater 208 is provided over the entire width of the air flow path 216 in the left-right direction, and is installed almost directly above the blowing nozzle 210. Since the heater 208 is installed over the entire width of the air flow path 216, the air flow is surely heated through the heater 208 before being blown out from the blowing nozzle 210. Therefore, the air flow warmed by the heater 208 can be reliably blown from the blow nozzle 210 and blown to the hand, and temperature unevenness can be eliminated. The closer the installation distance between the heater 208 and the blowout nozzle 210 is, the better. If the distance between the heater 208 and the blow nozzle 210 is long, the air flow warmed by the heater 208 is gradually cooled until it is guided to the blow nozzle 210, and the temperature of the air flow blown to the hand is lowered. When the distance is short, the air flow warmed by the heater 208 is jetted from the blow nozzle while warm, so that heat energy is not wasted and the user can dry his hands with good warm air.

  The heater 208 provided from one side to the other side in the air channel 216 is installed so as to cover at least the entire width in the left-right direction of the blowing nozzle 210, and preferably from the end of the air channel 216 to the end. It is installed so that it crosses without gap.

  As described above, according to the present invention, when using the hand dryer, the water inserted on the hand is blown away while warming the hand inserted by the heating means. The user can comfortably use the hand dryer even in winter or in cold regions.

DESCRIPTION OF SYMBOLS 100 Hand dryer 102 Main body box 104 Surface cover 106 Water receiving tray 108 Water receiving part 110 Hand drying chamber 200 Function part 202 Suction port 204 Filter 204a Filter handle 206 Fan unit 207 Fan unit case 208 Heater 210 Blowing nozzle 210a Nozzle hole 212 Sensor 214 Control unit 216 Air flow path 218 Power supply unit 220 Connection terminal 222 Cable 224 Heat exchange fin 226 Casing L Virtual vertical line passing through the left end R Virtual vertical line passing through the right end

Claims (3)

A hand drying device that blows air on a user's hand to dry it,
A main body box having airflow generating means for generating an airflow therein;
A blowout nozzle for blowing the airflow onto the hand;
An air flow path connecting the air flow generating means and the blowing nozzle;
Heating means for heating the air stream;
A power supply for supplying power to the heating means,
The heating means includes
A heating part provided in the air flow path from one side in the left-right direction to the other side in a front view;
A connection terminal that protrudes from the heat generating part and receives power from the power supply part,
The hand-drying device in which the entire connection terminal is located between a virtual vertical line passing through the left end of the heat generating unit and a virtual vertical line passing through the right end in the front view.   The hand dryer according to claim 1, wherein the connection terminal protrudes from the heat generating portion toward the air flow generating means.   The hand-drying device according to claim 1, wherein the heat generating unit is installed across the entire width in the left-right direction in the air flow path.