JP2015224603A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric fan that can send air in an operation mode for sending air to a person and an operation mode for eliminating temperature irregularity in a room.SOLUTION: An electric fan body according to the present invention comprises: an infrared sensor 5 serving as temperature detection means that detects ambient temperatures; and an operation mode control unit 26 that receives the detected temperatures from the infrared sensor 5, controls a first operation mode for sending air to a person and a second operation mode for eliminating temperature irregularity in a room, and switches between the first operation mode and the second operation mode.

Description

  The present invention relates to a fan capable of switching between a plurality of operation modes.

  2. Description of the Related Art Conventionally, there has been known an electric fan that has a function of measuring a user's skin temperature with a temperature sensor, adjusting the air volume according to the measured temperature, and blowing air to the user (Patent Document 1).

  There is also known an electric fan having a function of detecting the movement of a human body (user) by human body detection means and causing the wind direction to follow the movement of the human body (Patent Document 2).

JP-A-5-172095 Japanese Patent Laid-Open No. 7-180693

  In recent years, in order to save energy, etc., the room temperature is adjusted by an air conditioner, and the indoor air is circulated by blowing a fan to reduce the temperature difference generated in the room, and the temperature-controlled air is blown to the person by the air conditioner. The method of using a fan is recommended.

  In addition, when there are a plurality of people in the room, the air blower of the electric fan is swung to blow air, but at that time, the air blower blows toward a place where there is no user. Time is wasted, and it is desirable to shorten the time and efficiently blow air to each person.

  However, the electric fan disclosed in Patent Document 1 has a problem that it is not possible to efficiently eliminate temperature unevenness, which is a temperature difference generated in the room, only by adjusting the amount of air blown to the user.

  Moreover, although the fan disclosed by the said patent document 2 can blow efficiently with respect to the person when there is one user, there are a plurality of persons in the room and each person is separated. In the case of being in a place, there is a problem that the efficiency is not good because the air is blown to a place where no one is between people.

  Therefore, in view of the above problems, the present invention provides a fan capable of switching between an operation mode for blowing air toward a person who is a user and an operation mode for blowing air toward a place where there is uneven temperature in the room. The first purpose.

  In addition, a second object of the present invention is to provide a fan that enables efficient and efficient swing air blowing operation for a plurality of people.

  According to the first aspect of the present invention, the temperature detection means for detecting the ambient temperature, the first operation mode for blowing air toward the person, and the second operation mode for eliminating the temperature unevenness in the room are controlled, and the first And an operation mode control unit that switches between the second operation mode and the second operation mode.

  According to a second aspect of the present invention, the first operation mode has a configuration in which a person is detected by the temperature detection means and air is blown only toward the person.

  According to a third aspect of the present invention, the second operation mode has a configuration in which temperature unevenness is detected by the temperature detection means and air is blown toward a place where the temperature unevenness exists.

  According to a fourth aspect of the present invention, the first operation mode is configured to blow a widening wind, and the second operation mode is configured to blow a straight wind.

  In the invention of claim 5, a blower, a swing device that swings the blower, a drive source that drives the swing device, and a controller that controls the swing speed and angle of the blower, In the electric fan provided with the person detecting means for detecting a person, the control unit has a configuration for controlling the swing speed and the swing angle of the air blowing unit based on the detection result of the person detecting means. Yes.

  In a sixth aspect of the invention, the drive source is a stepping motor.

  According to the first aspect of the present invention, the air can be blown toward the person in the first operation mode, and the temperature unevenness in the room can be eliminated by the second operation mode. Further, the first operation mode and the second operation mode can be switched.

  According to invention of Claim 2, a person can be detected with a temperature sensor and it can blow with respect to the person.

  According to the invention of claim 3, it is possible to detect the temperature unevenness in the room by the temperature sensor and to blow air toward the place where the temperature unevenness exists.

  According to the invention of claim 4, in the first operation mode in which air is blown toward a person, it is possible to blow wind that spreads and blow soft wind. Further, in the second operation mode in which air is blown toward a place with temperature unevenness, it is possible to eliminate the temperature unevenness by intensively blowing air to a place with temperature unevenness.

  According to the invention of claim 5, it is possible to reduce the time of blowing toward the place where there is no person during the swinging operation of the blowing section, and to reduce the waste of blowing toward the place where there is no person. it can.

  According to invention of Claim 6, the swing speed and angle of a ventilation part can be set exactly.

It is a perspective view of the electric fan main body which shows 1st Example of this invention. It is a front view of an electric fan main body same as the above. It is a right side view of a fan main part same as the above. It is a perspective view of the electric fan main body which turned the ventilation part to the right direction same as the above. It is a perspective view of the electric fan main body which turned the ventilation part upwards same as the above. It is a flowchart explaining operation | movement of an electric fan main body same as the above. It is a block diagram which shows the structure of a fan main body same as the above. It is a figure which shows the detection visual field and measurement temperature of the infrared sensor of 1st Example. It is a front view of the fan of the first embodiment. It is a rear view of a fan same as the above. It is a perspective view of a fan same as the above. It is a principal part longitudinal cross-sectional view of the electric fan main body containing a fan same as the above. It is a figure which shows the ventilation state of the electric fan main body which shows 2nd Example of this invention. It is a perspective view of the principal part of the fan guard of 2nd Example. It is the graph which showed the relationship between the difference in the shape of the crosspiece with respect to the rotation direction of the fan of 2nd Example, and a wind speed distribution. It is a front view of the front guard assembly which is a modification of 2nd Example. It is a rear view of a front guard assembly same as the above. FIG. 18 is a front view of a front guard assembly having a crosspiece shape different from that of FIG. 16 and FIG. 17. FIG. 19 is a rear view of the front guard assembly of FIG. It is a perspective view of the electric fan main body which shows 3rd Example of this invention. It is a block diagram which shows the structure of a fan main body same as the above.

  Hereinafter, preferred embodiments of the electric fan according to the present invention will be described with reference to the accompanying drawings. In the following embodiments, common portions are denoted by common reference numerals, and description of common portions is omitted as much as possible to avoid duplication.

  1-5 has shown the external appearance of the electric fan main body 1 in 1st Example of this invention. In each of these drawings, 2 is a base placed on the floor surface of the room, 3 is a support column extending upward from the base 2, 4 is a blower unit that sends out wind, Infrared sensor 5 is provided as a temperature detecting means for detecting the temperature of a wall or an indoor wall, and the air blowing unit 4 is swung in an arbitrary direction between the upper end portion of the column 3 and the air blowing unit 4. The head swing device 6 is equipped.

  The base 2 is formed in a flat shape whose outer shape is substantially circular in plan view, and an operation unit 7 using a plurality of keys and buttons and a display unit 8 using a display body such as an LED are provided on the front upper surface. A light receiving unit 9 that receives a signal from a remote controller (not shown) as a remote control body is provided on the front side of the side surface of the base 2.

  The support column 3 constitutes a lifting device that lifts and lowers the air blowing unit 4 including the swing device 6, and has a cylindrical support base 10 that extends vertically from the rear upper surface of the base 2, and slides up and down inside the support base 10. It consists of a sliding rod 11 that is movably assembled, and a lock button 12 provided at the upper rear of the column base 10 is pushed against the urging force of an elastic body (not shown) to slide with the column base 10. The engagement with the moving rod 11 is released, and the sliding rod 11 that supports the blower unit 4 and the swinging device 6 slides up and down with respect to the column base 10.

  In addition, the electric fan in a present Example is comprised by the said electric fan main body 1 and a remote control.

  The blower unit 4 includes a blower drive unit 28, a fan 14 that is rotationally driven by the blower drive unit 28, and a fan guard 15 that is a net-like guard that covers the fan 14. In the present embodiment, a DC (direct current) motor is used as the air blowing drive unit 28.

  Further, the blower drive unit 28 of the blower unit 4 is covered with a drive unit cover 16 having an opening on the front side, and the fan guard 15 is attached to the opening periphery of the drive unit cover 16. An infrared sensor 5 is provided on the front side of the upper surface of the fan guard 15. The infrared sensor 5 uses, for example, a thermopile type infrared sensor that detects the temperature of an object by generating a thermoelectromotive force according to the amount of incident energy when receiving infrared light emitted from the object.

  In the present embodiment, in particular, a DC motor is employed instead of an AC (alternating current) motor as a drive source of the blower unit 4, and therefore the rotational speed of the fan 14 can be arbitrarily changed.

  The operation of the electric fan according to the present embodiment having the above configuration will be described based on the flowchart shown in FIG. First, the electric fan main body 1 of the present embodiment detects whether or not the power is turned on by operating the operation unit 7 or the remote controller (S1). When the power is turned on (Yes), the infrared sensor 5 is shown in FIG. 8 is detected for each divided range 22 obtained by dividing the detection visual field 21 shown in FIG. 8 into a plurality of ranges (S2). When the detection of all the divided ranges 22 is completed, the average value of the temperatures of all the divided ranges 22 is calculated (S3). Next, an absolute value (hereinafter referred to as A value) of the temperature difference between the calculated average value and each divided range 22 is calculated (S4), and it is determined whether or not the A value is equal to or larger than a preset specified value. (S5). When the A value is equal to or less than the specified value (No), it is determined that there is no temperature unevenness, and the temperature is detected again for each divided range 22 (S2). On the other hand, when the A value is equal to or greater than the specified value (Yes), it is determined that there is temperature unevenness, and air blowing by the air blowing unit 4 is started (S6). During the blowing by the blowing unit 4, the temperature for each divided range 22 is detected (S7), and the average value of the temperatures of all the divided ranges 22 is calculated (S8). Then, an A value is calculated from the calculated average value and the temperature of each divided range 22 (S9), and it is determined whether the A value is equal to or greater than a specified value (S10). When the A value is equal to or greater than the specified value (Yes), the blowing is continued (S6), and when the A value is equal to or less than the specified value (No), the blowing is stopped (S11). After the blowing is stopped, it is detected whether or not the power is turned off (S12). When the power is turned off (Yes), the operation of the electric fan body 1 is completely stopped and the power off is not detected. In the case (No), detection of the temperature for each divided range 22 is started again (S2).

  Next, the structure of the electric fan main body 1 of a present Example is demonstrated based on the block diagram shown in FIG. The control unit 17 provided in the electric fan body 1 controls the operation of the electric fan body 1 based on the operation information of the operation unit 7 and the communication information received from the remote controller received by the light receiving unit 9.

  The control unit 17 calculates the storage unit 23 that stores the temperature information measured by the infrared sensor 5, the calculation unit 24 that calculates the average temperature and the A value from the temperature information stored in the storage unit 23, and the calculation unit 24. A determination unit 25 that determines whether the A value is equal to or greater than a specified value, and an operation mode control unit 26 that selects an operation mode based on the determination result of the determination unit 25 and sends control information to the drive unit 18. It has.

  In addition, a drive unit 18 controlled by an operation mode control unit 26 is provided inside the electric fan body 1. The drive unit 18 switches the swing drive unit 27 that is a drive source of the swing motion of the blower unit 4, the air volume drive unit 28 that is the drive source of the rotational motion of the fan 14, and the width of the wind sent out by the blower unit 4. An air width switching drive unit 29 as means is provided.

  Furthermore, the display part 8 which displays the operation state of the electric fan main body 1 by lighting of LED etc. is provided in the upper surface of the base 2. As shown in FIG.

  Next, a specific operation of the electric fan body 1 will be described. First, when the user operates the operation unit 7 or the remote controller to turn on the electric power of the electric fan body 1, a display indicating the power-on state is displayed on the display unit 8.

  Further, at the same time as the power is turned on, the infrared sensor 5 starts detecting the temperature of the divided range 22 as described above. The infrared sensor 5 measures the temperature of a person, an object, a floor, a wall, etc. existing in the detection visual field 21. The measurement when there is a person in the room and when there is no person is specifically described based on FIG. To do. 8A shows a state where there is no person in the room, and FIG. 8B shows a state where there is one person in the room.

  First, the infrared sensor 5 divides the detection visual field 21 into a plurality of divided ranges 22. 8A and 8B, the image is divided into eight division ranges 22 each of a to h and i to p. The measurement results of each divided range 22 measured by the infrared sensor 5 are displayed in the table of FIG.

  Next, the detected temperature value is stored in the storage unit 23 in the control unit 17 in association with the position information of the divided range 22. The position information is assigned as shown in a to p in FIG. Thereafter, the arithmetic unit 24 in the control unit 17 calculates the average value of the temperatures of all the divided ranges 22 stored in the storage unit 23. The temperature average value in FIG. 8A is 22.39 [° C.], and the temperature average value in FIG. 8B is 22.69 [° C.].

  Then, an A value that is an absolute value of a temperature difference between the temperature of each divided range 22 stored in the storage unit 23 and the average value of the temperatures calculated by the calculation unit 24 is calculated. The A values of a to p are as shown in the tables of FIGS.

  Then, it is determined in the determination part 25 in the control part 17 whether A value is more than a regulation value. If the A value is greater than or equal to the specified value, it is determined that there is temperature unevenness, and if it is less than the specified value, it is determined that there is no temperature unevenness. The specified value can be set to an arbitrary value in advance, but in this embodiment, the specified value is set to 1.0. Therefore, it is the division range 22 of the position information 1 that is determined to be greater than or equal to the specified value in FIGS.

  Here, when the divided range 22 determined to have temperature unevenness from the vertical angle of the blower 4 and the range of the detection visual field 21 of the infrared sensor 5 has a predetermined height, for example, the blower 4 is directed to the front. When the position is lower than the height of the infrared sensor 5, it is determined that the object causing the temperature unevenness is a person, and when the position is higher than the predetermined height, the temperature unevenness is generated. Is determined to be the air conditioner 31. FIGS. 8A and 8B show the detection visual field 21 in a state in which the air blowing unit 4 faces downward, and the target causing the temperature unevenness in the divided range 22 of the position information l is a person. It is judged.

  When it is determined that the subject is a person, the operation mode control unit 26 in the control unit 17 selects the first operation mode, and control information for performing air blowing in the first operation mode is provided. It is sent from the operation mode control unit 26 to the control unit 18 and air blowing in the first operation mode is started. On the other hand, when it is determined that the target is the air conditioner 31, the operation mode control unit 26 selects the second operation mode, and the control information for performing air blowing in the second operation mode is the operation mode control. It sends out to the control part 18 from the part 26, and the ventilation in a 2nd operation mode is started.

  The first operation mode is a rhythm in which the air blowing section 4 is swung so that the air is blown toward the divided range 22 corresponding to the position information in which the infrared sensor 5 detects a person due to a temperature difference, and the air volume changes with time. Blow with wind. Moreover, a comfortable wind like a natural wind can be sent by sending out the spreading wind.

  On the other hand, in the second operation mode, the straight air flow without the swinging motion of the blower 4 toward the divided range 22 corresponding to the position information detected by the infrared sensor 5 due to the temperature difference is detected. Send. In this way, by sending a straight wind toward the range where the temperature unevenness occurs, the air in the range is stirred, and the temperature unevenness can be improved.

  Here, switching between the spreading wind and the straight wind will be described. 9-12 has shown the external appearance of the fan 14 in a present Example. The fan 14 here has a configuration in which an axial flow type first blade portion 41 and a mixed flow type second blade portion 42 having a smaller diameter than the first blade portion 41 are combined. At the center of the rotating boss 43, a metal connecting portion 44 connected to the rotating shaft 28A (see FIG. 12) of the blower driving portion 28 is attached and fixed to the fan 14 via an elastic member 45 serving as a rubber damper. Is done. Further, a second blade portion 42 having a plurality of wind tunnels 46 is disposed on the rotating boss 43 so as to surround the connecting portion 44.

  Each of the wind tunnels 46 of the second blade portion 42 has the same shape, and has an air inlet 47 on the rear surface of the rotating boss 43 and an air outlet 48 on the front surface of the rotating boss 43. Are arranged on the outer peripheral side of the fan 14 and in the direction opposite to the rotation direction S of the fan 14. Further, the first blade 49 that divides the adjacent wind tunnels 46, 46 swells in the forward direction with respect to the rotation direction S of the fan 14, whereas the second blade of the first blade portion 41 having a propeller shape. 50 bulges in the direction opposite to the rotation direction S of the fan 14. Here, the second blade portion 42 has a configuration of a mixed flow type fan that sends air sucked in the axial direction obliquely forward, but is a centrifugal type fan that sends air sucked in the axial direction in the lateral direction (centrifugal direction). You may have a form.

  FIG. 12 is a longitudinal sectional view of a main part of the electric fan body 1 including the fan 14 described above. In the drawing, the front and rear surfaces of the drive unit cover 16 are provided with vent holes 51 and 52 for taking air from the rear of the fan 14 of the blower unit 4 to the intake port 47 of the second blade unit 42, respectively. Reference numeral 53 denotes a shutter serving as an opening / closing means for switching the opening / closing of the vent hole 51 disposed to face the intake port 47 in order to open / close the intake port 47 of the second blade portion 42. The shutter 53 can be operated manually or electrically. In the present embodiment, the shutter 53 is movably provided inside the drive unit cover 16. However, the shutter 53 allows air to enter the inlet 47 or blocks it. Any structure can be used as long as it has any structure. Here, the diagonal flow type second blade portion 42 is disposed to face the front surface of the drive portion cover 16, while the axial flow type first blade portion 41 is disposed outside the drive portion cover 16. . In addition, 54 is a spinner that is screwed onto the rotating shaft 13A of the DC fan motor 13 to attach and fix the fan 14 to the rotating shaft 13A.

  In this embodiment, when the operation unit 7 or the attached remote controller is operated to start the operation, the fan 14 rotates in a predetermined rotation direction S by supplying power to the DC fan motor 13, and the rear of the fan 14. The wind sucked into the first blade part 41 from the front flows forward along the axial direction of the fan 14, and the straight wind is sent out from the first blade part 41.

  Here, when the shutter 53 is moved to a position where the vent hole 51 is opened, as shown by the white arrow in FIG. A flow of wind from another vent hole 51 toward the air inlet 47 formed behind the second blade portion 42 is formed inside the electric fan body 1. Thus, the wind sucked into the air inlet 47 of the second blade portion 42 passes through the wind tunnel 46, flows obliquely forward with respect to the axial direction of the fan 14, and is sent out from the exhaust port 48 of the first blade portion 41. It becomes possible to provide a wide wind from the front of the electric fan body 1 by colliding with the wind sent out from the first blade portion 41.

  On the other hand, when the shutter 53 is moved to the position where the vent hole 51 is closed, the flow of the wind indicated by the white arrow in FIG. Only sent out. Accordingly, when the air vent 51 and hence the air inlet 47 of the second blade portion 42 are closed by the switching operation of the shutter 53, the straight air is sent out from the entire fan 14, and the air intake of the second blade portion 42 is performed. When the opening 47 is opened, wind spreading in the lateral direction can be sent out from the entire fan 14.

  As described above, in this embodiment, the infrared sensor 5 as temperature detecting means for detecting the ambient temperature, the first operation mode that receives the detected temperature from the infrared sensor 5 and blows air toward the person, and the room And an operation mode control unit 26 that controls the second operation mode that eliminates the temperature unevenness and switches between the first operation mode and the second operation mode.

  In this case, when blowing air toward a person, it is possible to send a natural and comfortable wind, and when eliminating the temperature unevenness in the room, the temperature unevenness is eliminated by blowing air toward a place with temperature unevenness. can do. Further, since the two operation modes can be switched, it is possible to blow air adapted to the intended use.

  Moreover, in a present Example, the 1st operation mode becomes a structure which detects a person with the infrared sensor 5, and ventilates only toward a person.

  In this case, even if the air blower 4 is swung, the air is not blown to a place where there is no person, and a natural and comfortable wind can be sent only to the place where the person is present.

  In the present embodiment, the second operation mode is configured to detect temperature unevenness by the infrared sensor 5 and to blow air toward a place where there is temperature unevenness.

  In this case, the air can be accurately blown toward a place where there is temperature unevenness, and the temperature unevenness can be eliminated in a short time.

  In the present embodiment, the first operation mode is configured to blow a widening wind, and the second operation mode is configured to blow a straight traveling wind.

  In this case, a soft, natural and comfortable wind can be sent to a person, and the temperature unevenness can be eliminated in a short time by sending straight air to a place where the temperature is uneven.

  In the second embodiment of the present invention, the first operation mode and the second operation mode are linked with the operation of the air conditioner 31. Therefore, in this embodiment, it is only necessary to detect temperature unevenness by the air conditioner 31, and the temperature measurement by the infrared sensor 5 is performed at a predetermined height of the detection visual field 21, for example, the height of the infrared sensor 5 when the air blowing unit 4 is directed to the front. Only higher positions are detected.

  FIG. 13 shows the temperature distribution of the air conditioner 31 in the room in summer and winter and the air blowing state of the fan. The temperature of the wall and floor in the summer room is about 25 to 30 degrees, and the wall and floor in the room in winter. The temperature is assumed to be about 15 to 20 degrees.

  In summer, since the air conditioner 31 is cooled, when the air conditioner 31 is blowing cold air, the vicinity of the air outlet 32 of the air conditioner 31 is lower than the temperature of the surrounding walls and ceiling. Therefore, when the temperature of the division range 22 is measured by the infrared sensor 5, the temperature of the division range 22 assigned to the air outlet 32 of the air conditioner 31 becomes lower than the average value of all the division ranges 22 by a certain value or more. In this case, the determination unit 25 determines that the air conditioner 31 is in cooling operation.

  When it is determined that the air conditioner 31 is in cooling operation, air is blown in the first operation mode based on the control information from the operation mode control unit 26, and the air cooled by the air conditioner 31 is given to a person. A comfortable wind can be sent. In the first operation mode, air may be blown toward the cool air blown from the air outlet 32 of the air conditioner 31 without swinging the blower unit 4, or the blower unit 4 may be swung to move indoors. It is good also as what blows in a wide range with respect to the floor vicinity.

  On the other hand, since the air conditioner 31 is heated in winter, when the air conditioner 31 is blowing warm air, the vicinity of the air outlet 32 of the air conditioner 31 is higher than the temperature around the wall or ceiling. Therefore, when the temperature of the divided range 22 is measured by the infrared sensor 5, the temperature of the divided range 22 assigned to the air outlet 32 of the air conditioner 31 becomes higher than the average value of the temperatures of all the divided ranges 22 by a certain value or more. In this case, the determination unit 25 determines that the air conditioner 31 is in the heating operation.

  When it is determined that the air conditioner 31 is in the heating operation, air is blown in the second operation mode based on the control information from the operation mode control unit 26, and the warm air accumulated near the ceiling 36 is agitated. It can be moved to the vicinity of the floor, which is a living space for people. In the second operation mode, the air blowing unit 4 may be blown toward the air outlet 32 of the air conditioner 31 without swinging the air blowing unit 4, or the air blowing unit 4 may be swung to the vicinity of the indoor ceiling 36. It is good also as what ventilates widely.

  In the present embodiment, the switching between the first operation mode and the second operation mode is automatically performed by the operation mode control unit 26 sending it to the drive unit 18 based on the determination of the determination unit 25. A person may operate the operation unit 7 or a remote controller to switch manually.

  14 to 19 show the fan guard 15 in the second embodiment of the present invention. The fan guard 15 has a configuration that can be divided into a front guard 61 that covers the front side of the fan 14 and a rear guard 62 that covers the rear side of the fan 14. While the bone portion 63 and the outer peripheral portion (not shown) of the front guard 61 are metal wires, the rear guard 62 is configured as a synthetic resin. Further, a ventilation switching unit 64 that is inscribed by the front guard 61 is provided, and the ventilation switching unit 64 is fitted inside the rear guard 62 in order to ensure the strength of the rear guard 62.

  The air blowing switching unit 64 is made of synthetic resin, and a front guard assembly 65 configured by mounting the front guard 61 is reversibly attached to and removed from the front end opening of the rear guard 62. The front guard assembly 65 and the rear guard 62 constitute a fan guard 15 serving as a guard. Further, the bone portions 63 formed on the peripheral edge portion 66 of the rear guard 62 are arranged with appropriate intervals along the circumferential direction rather than the front-rear direction of the fan guard 15.

  The air blowing switching unit 64 includes a hollow circular outer peripheral frame 67 that fits and holds the outer peripheral portion of the front guard 61, a circular base portion 68 that is located at the center of the outer peripheral frame 67 and is attached to the central portion of the front guard 61, and the front guard It is composed of a plurality of curvilinear bars 69 facing the bone part 63 of the 61 and arranged so as to form a spiral gap from the outer periphery of the circular base 68 toward the outer peripheral frame 67. Therefore, the front guard 61 in this embodiment is a front guard assembly 65 that substantially includes the front guard 61 and the crosspiece 69.

  In this embodiment, when the operation unit 7 or the remote controller is operated to start the operation, the fan 14 rotates in the predetermined rotation direction S by the power supply to the air volume driving unit 28, and the fan 14 passes through the rear guard 62. The wind sucked from the rear of the air flows forward along the axial direction of the fan 14, and air is blown from the air blowing unit 4 through the front guard assembly 65.

  In this case, as shown in FIG. 14, the front guard assembly 65 is attached to the rear guard 62 so that the curved shape from the base end to the outer periphery of the crosspiece 69 is opposite to the rotation direction S of the fan 14. When mounted, the wind sent from the fan 14 toward the front guard assembly 65 does not spread so much as it passes between the crosspieces 69, 69, and from the front of the front guard assembly 65 through the gap of the front guard 61. A straight wind can be sent out. On the other hand, when the front guard assembly 65 is mounted on the rear guard 62 so that the curved shape from the base end of the crosspiece 69 toward the outer periphery is the forward direction with respect to the rotation direction S of the fan 14, It spreads when passing between them, and the wind diffused from the front of the front guard assembly 65 through the gap of the front guard 61 can be sent out. In other words, here, the means for enabling the front guard assembly 65 to be detachably attached to the rear guard 62 is provided as a switching means for switching the shape of the crosspiece 69 from the forward direction to the reverse direction with respect to the rotation direction S of the fan 14. It has been.

  FIG. 15 shows a case where the shape of the crosspiece 69 as a spiral rib provided in the front guard assembly 65 is “swirl right direction (fan rotation direction)” in the forward direction with respect to the rotation direction S of the fan 14. In the case of “swirl right direction (fan rotation reverse direction)” directed forward with respect to the rotation direction S of the fan 14, which wind speed is 60 cm in front of the fan body 1 and measured at a measurement distance from the center of the fan 14. It is shown in a graph how it is distributed. From this measurement result, it can be seen that the wind is diffused and sent out in the “swirl right direction (fan rotation direction)” than in the “swirl right direction (fan rotation reverse direction)”.

  16 to 19 show a front guard assembly 65 of another modified example. Here, the front guard assembly 65 serves as a switching means for switching the shape of the crosspiece 69 between the forward direction and the reverse direction with respect to the rotation direction S of the fan 14. The lid 70 and the circular base 68 are rotatably attached to the outer peripheral frame 67, and the curved shape of the crosspiece 69 changes as the lid 70 is turned. Is configured to do.

  In this modification, as shown in FIGS. 16 and 17, the lid 70 is manually operated so that the curved shape from the base end to the outer periphery of the crosspiece 69 is the forward direction with respect to the rotation direction S of the fan 14. , The wind sent from the fan 14 toward the front guard assembly 65 spreads when passing between the crosspieces 69, 69 and passes through the gap between the front guards 61 to the front of the front guard assembly 65. The wind which diffused from can be sent out. On the other hand, as shown in FIGS. 18 and 19, the lid 70 is manually rotated so that the curved shape from the base end to the outer periphery of the crosspiece 69 is opposite to the rotation direction S of the fan 14. Then, the wind sent from the fan 14 toward the front guard assembly 65 does not spread so much as it passes between the crosspieces 69, 69, and goes straight from the front of the front guard assembly 64 through the gap of the front guard 61. The wind which has sex can be sent out. Further, since such wind switching can be performed only by operating the lid 70 from the outside of the fan guard 15, it is possible to save the trouble of attaching and detaching the front guard assembly 65 from the rear guard 62.

  As described above, in this embodiment, in the electric fan that includes the rotating fan 14 and the fan guard 15 that is a net-like guard that covers the fan 14, the fan guard 15 is disposed to face the front surface of the fan 15. The front guard assembly 65 is provided with a plurality of bars 69 having the same shape, and switching means for switching the curved shape of the bars 69 to the forward direction and the reverse direction with respect to the rotation direction S of the fan 15 is provided.

  In this case, instead of changing the rotational speed of the fan 15 to change the strength of the wind, the shape of the crosspiece 69 is changed in the rotational direction of the fan 14 by changing the shape of the crosspiece provided in the front guard assembly 65 by the switching means. When facing forward with respect to S, the front guard assembly 65 can diffuse and spread the wind, and the shape of the crosspiece 69 is opposite to the rotational direction S of the fan 14. When facing, it becomes possible to send straight wind from the front guard assembly 65. Therefore, it becomes possible to switch and send out the wind spreading as a fan and the straight wind.

  FIG. 20 shows the electric fan main body 1 according to the third embodiment of the present invention, which is provided with a human sensor 71 which is a human detection means for detecting the presence or absence of a person on the front side of the upper surface of the blower unit 4. is there. Although the pyroelectric infrared sensor is used for the human sensor 71 of this embodiment, any other sensor may be used as long as it can detect a person.

  The operation of the electric fan body 1 of the present embodiment will be described based on the block diagram shown in FIG. The human sensor 71 detects the presence / absence, number, and position of a person in the detection visual field 21 from the body temperature of the person, and the detection result is sent to the operation mode control unit 73 in the detection result processing unit 72 provided in the electric fan body 1. Is processed into sending information. The operation mode control unit 73 is provided inside the electric fan main body 1. When receiving information from the detection result processing unit 72, the operation mode control unit 73 drives the air blowing drive unit 74, which is a drive source, based on the information, and is performed by the air blowing unit 4. Start blowing.

  When a person is present in the detection visual field 21, the human sensor 71 can obtain a signal corresponding to the temperature difference between the background temperature of the indoor wall or the like and the surface temperature of the person. When sent to the processing unit 72, the detection result processing unit 72 specifies the position of the person in the detection visual field 21. This position information is sent to the operation mode control unit 73, and air corresponding to the person's position information is blown.

  When the detected person is one person, the control information is sent from the operation mode control unit 73 to the air blowing drive part 74 so as to swing the air blowing part 4 at a constant speed at an angle corresponding to one person. Further, when the air is blown to one person, the control information is transmitted so that the swing speed is constant.

  On the other hand, when there are a plurality of detected people, the operation mode control unit 73 controls the air blowing drive unit 74 so that the air blowing unit 4 swings so as to blow air to the entire range where the person is present. Information is sent out. Further, when the air blowing unit 4 is facing a place where the human sensor 71 does not sense a person, the swing speed is increased, and when the air blowing part 4 is facing a place where a person is sensed, the swing speed is kept constant. Control information is sent out.

  A stepping motor is used for the blower drive unit 74 of the present embodiment, and the swing speed and swing angle of the blower unit 4 can be easily adjusted simply by giving an appropriate pulse drive signal from the operation mode control unit 73. can do.

  As described above, in the present embodiment, the blower unit 4, the swing device 6 that swings the blower unit 4, the blower drive unit 74 as a drive source that drives the swing device 6, and the blower unit 4. In a fan provided with an operation mode control unit 73 as a control unit for controlling the swing speed and angle, and a human sensor 71 as a human detection means for detecting a person, the operation mode control unit 73 includes a human sensor. Based on the detection result 71, the swing speed and the swing angle of the blower unit 4 are controlled.

  In this case, the human sensor 71 acquires the position information of the person, and changes the swing speed of the blower 4 when the blower 4 is directed to a place where the person is present and a place where the person is absent based on the obtained position information. By doing this, it is possible to shorten the air blowing time to a place where there is no person and reduce the waste of the swinging air blowing operation.

  In the present embodiment, a stepping motor is used for the air blowing drive unit 74.

  In this case, the swing speed and the swing angle of the blower unit 4 can be easily adjusted, and by combining with the human sensor 71, a wasteful blow blow operation can be performed.

  In addition, this invention is not limited to said each Example, A various change is possible in the range which does not deviate from the meaning of this invention. For example, the swing angle / speed and air volume may be appropriately set by the user.

4 Air blower 5 Infrared degree sensor (temperature detection means)
6 Swing device 17 Control unit 26 Operation mode control unit 61 Human sensor (human detection means)
64 Blower drive unit (drive source)

Claims (6)

Temperature detection means for detecting the ambient temperature;
In response to the detected temperature from the temperature detecting means, the first operation mode for blowing air toward the person and the second operation mode for eliminating the temperature unevenness in the room are controlled, and the first operation mode and the first operation mode are controlled. An electric fan comprising: an operation mode control unit that switches between two operation modes.   2. The electric fan according to claim 1, wherein the first operation mode is configured to detect a person by the temperature detection unit and to blow air only toward the person.   2. The electric fan according to claim 1, wherein the second operation mode is configured to detect temperature unevenness by the temperature detecting unit and to blow air toward a place where the temperature unevenness exists.   The electric fan according to any one of claims 1 to 3, wherein the first operation mode is configured to blow a widening wind, and the second operation mode is configured to blow a straight wind. A blowing section;
A swing device for swinging the blower,
A drive source for driving the swing device;
A control unit for controlling the swing speed and angle of the air blowing unit;
In a fan provided with a person detection means for detecting a person,
The electric fan according to claim 1, wherein the control unit controls a swing speed and a swing angle of the blower unit based on a detection result of the human detection unit.   6. The electric fan according to claim 5, wherein the driving source is a stepping motor.