JP2015183669A - Electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric fan that performs air quantity control based on the feeling temperature of a user.SOLUTION: An electric fan includes: a temperature sensor 7 for detecting the temperature of a room; an operation unit 6 with which a user sets operation of the electric fan; a feeling temperature setting unit 9 with which the user inputs a setting feeling temperature; a motor 3 for rotating a fan 2; and a control unit 8 for controlling the rotational frequency of the motor 3. The control unit 8 controls the rotational frequency of the motor 3 so that wind speed at a place away from the front face of the fan 2 by a predetermined distance becomes the setting feeling temperature, on the basis of the temperature detected by the temperature sensor 7 for each predetermined time and the setting feeling temperature.

Description

  The present invention relates to an electric fan that controls the air volume based on the temperature of sensation.

  Conventionally, this type of electric fan has a temperature detector composed of a motor equipped with a fan, a heater provided with a radiator plate, and a temperature sensor fixed to the radiator plate on the front surface of the fan. It is known to have a function of detecting the temperature changing at, and detecting the sensible temperature from the detected temperature and the power consumption of the heater in a pseudo manner to control the rotation of the fan. (For example, refer to Patent Document 1).

JP 62-48998 A

  Such a conventional fan detects the temperature of the cooling effect due to the wind speed of the fan with a temperature detection device composed of a heater provided with a radiator and a temperature sensor, and the detected temperature of the cooling effect and the consumption of the heater. The sensory temperature is artificially detected from the electric power. And the rotation speed of a fan is controlled so that it may become comfortable sensible temperature.

  According to such a configuration, the rotational speed of the fan is controlled so that the cooling effect of the position of the temperature detection device placed on the front surface of the fan becomes the target cooling effect set in advance in the fan. However, there is no means for grasping the wind speed received by the user, and there is no means for setting the sensible temperature desired by the user. For this reason, there has been a problem that the user may not be able to achieve the desired sensible temperature just by controlling the rotational speed of the fan so as to obtain the obtained cooling effect.

  Accordingly, the present invention solves the above-described conventional problems, and assumes a wind speed received by the user, and controls the rotation of the fan so that the sensible temperature felt by the user becomes the sensible temperature desired by the user. The purpose is to provide.

In order to achieve this object, the present invention includes a temperature sensor for detecting the temperature in the room,
An operation unit for the user to set the operation of the fan;
A sensible temperature setting unit that is provided in the operation unit and allows a user to input a set sensible temperature;
A motor that rotates the fan;
A control unit for controlling the rotational speed of the motor;
The control unit adjusts the rotation speed of the motor so that the sensory temperature at a predetermined distance from the front of the fan becomes the set sensory temperature based on the room temperature detected by the temperature sensor at regular intervals and the set sensory temperature. It has a function to control, thereby achieving the intended purpose.

According to the present invention, a temperature sensor for detecting an indoor temperature;
An operation unit for the user to set the operation of the fan;
A sensible temperature setting unit that is provided in the operation unit and allows a user to input a set sensible temperature;
A motor that rotates the fan;
A control unit for controlling the rotational speed of the motor;
The control unit adjusts the rotation speed of the motor so that the sensory temperature at a predetermined distance from the front of the fan becomes the set sensory temperature based on the room temperature detected by the temperature sensor at regular intervals and the set sensory temperature. The configuration with the function to control makes it possible to set the sensible temperature desired by the user and the wind speed of the place where the user receives the wind, so the sensible temperature at a predetermined distance from the fan can be set. It is possible to obtain an effect that the rotation of the fan can be controlled so as to achieve the temperature sensed by the user.

External view showing a fan according to a first embodiment of the present invention. Block diagram showing the configuration of the controller Diagram of temperature sensor setting unit that is a part of the operation unit Correlation diagram between rotation speed and wind speed at the same distance Flow chart of the control unit The block diagram which shows the structure of the control part of the electric fan of Embodiment 2 of this invention. Correlation diagram of rotation speed and wind speed at the same distance (a) 90 cm, (b) 140 cm, (c) 190 cm Flow chart of the control unit Overview view showing a part of the operation unit according to the third embodiment of the present invention. Overview view showing a part of the operation unit according to the fourth embodiment of the present invention.

  The invention according to claim 1 of the present invention is provided in the temperature sensor for detecting the temperature in the room, the operation unit for the user to set the operation of the fan, and the operation unit, and the user inputs the set sensory temperature. The sensor includes a sensory temperature setting unit, a motor that rotates the fan, and a control unit that controls the number of rotations of the motor. The control unit is based on the room temperature detected by the temperature sensor at regular intervals and the set sensory temperature. The rotational speed of the motor is controlled so that the temperature sensed at a predetermined distance from the front of the fan becomes the set temperature sense. As a result, the sensible temperature desired by the user is set, and the rotational speed of the fan is controlled so that the wind speed at a predetermined distance from the electric fan becomes the sensible temperature desired by the user. There is an effect that it can be controlled.

  In addition, the operation unit includes a distance setting unit that sets a distance between the place where the user receives the wind and the fan, and the distance set by the distance setting unit, the room temperature detected by the temperature sensor, and the setting experience Based on temperature, it has the structure which controls the rotation speed of the said motor so that the sensory temperature in the said distance becomes the said preset sensory temperature. As a result, the distance between the place where the user receives the wind and the electric fan becomes clear, so that the accuracy of the rotational speed of the motor for generating the wind speed required at the place where the user receives the wind can be improved. There is an effect.

  Further, the sensible temperature setting unit has a configuration in which a sensible temperature of the user is input and a set sensible temperature is calculated based on the input sensation and the room temperature detected by the temperature sensor. As a result, it is possible to calculate the set sensible temperature desired by the user based on the sensation felt by the user. In addition, there is an effect that the set sensible temperature is not greatly changed and the operation can be performed without knowledge of the sensible temperature whose definition is difficult to understand.

  In addition, the operation unit includes an air volume setting unit, and the sensory temperature setting unit is configured based on a change amount of the air volume setting input by the user to the air volume setting unit and a room temperature detected by the temperature sensor. It has a configuration for calculating temperature. As a result, the sensation felt by the user can be determined by an operation for changing the air volume, which is an operation that is easy to use for the user, and a set sensation temperature desired by the user can be calculated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the main part of the electric fan main body 1 according to this embodiment includes a fan 2, a motor 3 that rotates the fan 2, a support 4 that supports the fan 2, the motor 3, and a base 5 that fixes the support 4. Have. The base 5 has an operation unit 6 for operating the electric fan main body 1 on the front side, a temperature sensor 7 for detecting the room temperature on the back side, and a control unit 8 for controlling the number of rotations of the motor 3 inside. It has become.

  Further, as shown in FIG. 2, the operation unit 6 includes a sensible temperature setting unit 9 in which the user sets the sensible temperature in the same manner as a switch or the like for the user to operate the electric fan body 1. The control unit 8 is configured to receive information on the operation of the switch of the operation unit 6 and information on the room temperature of the temperature sensor 7 and transmit information on the number of rotations of the motor 3. For example, as shown in FIG. 3, the sensible temperature setting unit 9 includes a sensible temperature setting switch and an LED that indicates the set sensible temperature. When the sensible temperature setting switch is pressed, the setting is switched in the order of no setting, 20 ° C., 21 ° C., 22 ° C., 23 ° C., 24 ° C., 25 ° C., no setting, and the user selects the sensible temperature. The form of the sensible temperature setting unit 9 is not limited to the configuration shown in FIG. 3, but is set with a dial-type volume, keyed with the set sensible temperature, or the set sensible temperature is displayed on a liquid crystal display. There are things to do.

  Further, the control unit 8 stores the correlation between the rotation speed R of the motor 3 and the wind speed V at a predetermined distance from the electric fan main body 1 based on the rotation speed R. An example of the correlation between the rotational speed R and the wind speed V is shown in FIG.

And the control part 8 is constant from the electric fan main body 1 required in order to obtain the sensible temperature L from the temperature T of the room detected by the temperature sensor 7 and the value of the sensible temperature L set by the user in the sensible temperature setting part 9. The wind speed V of the distance is calculated from the following formula 1. The calculation formula (Formula 1) of the wind speed V is based on the generally known Linké temperature sensation formula (Formula 2).

^{V = (T-L) 2} /16 ·········· Formula 1
L = T-4√V ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Formula 2
T: Room temperature (° C.), V: Wind speed (m / s)

And the control part 8 determines the rotation speed of the motor 3 (and fan 2) using the correlation of the rotation speed R and the wind speed V shown in FIG. 4, and drives the motor 3 with the rotation speed.

  Here, as described above, the correlation between the rotational speed R and the wind speed V shown in FIG. 4 is at a predetermined distance from the electric fan body 1. That is, the distance between the actual user and the electric fan main body 1 may be different. However, the sensory temperature is a numerical value of the subject's feeling, that is, the subjectivity, so an accurate absolute value is not required. Therefore, it is more important to raise and lower the air volume appropriately based on the temperature of experience than to control it exactly according to the temperature of experience.

  In the above method, by determining the rotation speed R (in other words, the wind speed V at a predetermined distance), the temperature at the predetermined distance is controlled to the set temperature.

  On the other hand, when the user is at a position away from the predetermined distance, the set temperature is different from the set temperature. The user performs an operation of lowering the set sensible temperature if it is hot, and increasing the set sensible temperature if it is too cool, depending on the experience in that state. When the set sensible temperature is adjusted, the rotational speed R (wind speed V) is controlled according to the amount of change. And in the general usage form of an electric fan, even if the change of the sensible temperature of Formula 2 is linear with respect to the change of the rotation speed R within the range of the assumed wind speed and distance, there is no big influence.

  Accordingly, since the change in the temperature of the sensible temperature at the predetermined distance is substantially equal to the change in the temperature of the sensible temperature at the position of the user, the change in the set temperature of the sensible temperature is suitable even at a position different from the predetermined distance.

  As a representative, the correlation between the rotational speed R and the wind speed V shown in FIG. 4 is stored as a relationship at a distance about three times the diameter of the fan 2. For example, if the fan has a fan diameter of 30 cm, the fixed distance from the fan is about 90 cm.

  In the above configuration, the operation of the electric fan according to the present embodiment will be described.

FIG. 5 is an air flow control flowchart in the case where the temperature setting unit 9 receives a temperature setting input. As shown in FIG. 5, when it is detected that a user operation has occurred in the operation unit 6 of the electric fan body 1 (S501), it is determined whether or not the sensible temperature setting unit 9 has set the sensible temperature L in the operated content. Confirm (S502). If the sensible temperature L is not set, the operation unit 6 waits for the next operation to occur. If there is a setting of the sensible temperature L in the contents operated by the operation unit 6, the control unit 8 stores the set sensible temperature L _S (S503) and detects the room temperature T from the temperature sensor 7 (S504). ), The wind speed V is calculated using the set sensory temperature L _S , the temperature T, and Equation 1 (S505). Next, the rotational speed R corresponding to the calculated wind speed V is selected using the rotational speed-wind speed table of FIG. 4 (S507). Then, the selected rotational speed R is transmitted to the motor 3 to control the rotational speed of the motor 3 (S508). When the predetermined time period W has elapsed (S509), the control until the temperature T of the room is detected from the temperature sensor 7 and the rotational speed R is transmitted to the motor 3 is repeated until the next operation on the operation unit 6 occurs. . For example, when the set sensible temperature is 21 ° C. and the room temperature is 25 ° C., the wind speed at which the sensible temperature at a certain distance of the fan is 21 ° C. is 1.0 m / s according to Equation 1. . Then, the rotational speed 430 [rpm] is selected using the rotational speed-wind speed table of FIG. 4, the rotational speed 430 [rpm] is transmitted to the motor 3, and the rotational speed of the motor 3 is set to 430 [rpm]. To control. Further, when the fixed time W as the control cycle is 5 minutes, the temperature T of the room is detected by the temperature sensor 7 every 5 minutes, and the wind speed V at the temperature T at which the sensible temperature is 21 ° C. is calculated. Then, using the rotation speed-wind speed table of FIG. 4, the rotation speed R of the motor 3 is selected, the rotation speed R is transmitted to the motor 3, and the rotation speed of the motor 3 is adjusted.

  In this way, it is possible to set the sensible temperature desired by the user.

  Further, since the wind speed is changed based on the set sensible temperature, the user can drive with an appropriate air volume according to the user's desired sensation without increasing or decreasing the air volume in the dark clouds.

  In the first embodiment, the temperature and the sensory temperature set by the user are used to obtain the wind speed at which the sensory temperature at a certain distance from the electric fan body 1 is set to the sensory temperature set by the user. The humidity of the room may be detected from the above, and the wind speed may be calculated using the perceived temperature, the temperature and humidity of the room, and the generally known Misnar's perceived temperature formula. If the wind speed is calculated from the above conditions, there will be no difference in the effect.

(Embodiment 2)
The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the operation unit 6 is provided with a distance setting unit 10 for setting the distance between the place where the user receives wind and the fan, like a switch for operating the operation of the electric fan body 1 by the user. The configuration.

  Further, as shown in FIG. 7, the control unit 8 stores the correlation between the wind speed V and the rotation speed R that can be generated by the rotation of the motor 3 at the distances of 90 cm, 140 cm, and 190 cm from the electric fan body 1. It is.

  In the above configuration, the operation of the electric fan according to the present embodiment will be described.

As shown in FIG. 8, when it is detected that a user operation has occurred in the operation unit 6 of the electric fan main body 1, it is confirmed whether or not the sensible temperature setting unit 9 has set the sensible temperature L in the operated content. If the sensible temperature L is not set, the operation unit 6 waits for the next operation to occur. If there is a setting of the sensible temperature L in the contents operated by the operation unit 6, the control unit 8 stores the set sensible temperature L _S , detects the room temperature T from the temperature sensor 7, and sets the sensible temperature L Wind speed V is calculated using _S , temperature T, and Equation 1 used in the first embodiment. Next, it is confirmed whether or not the set distance X is set by the distance setting unit 10 of the operation unit 6. If the set distance X is not set, the set distance X is stored as 90 cm, and the set distance X is 90 cm and 140 cm. And 190 cm are stored, the set set distance X is stored. Then, the calculated wind speed V, the stored set distance X, the rotational speed R shown in FIG. 7 and the correlation table of the wind speed V are compared, and the rotational speed R corresponding to the wind speed V is selected. The selected rotation speed R is transmitted to the motor 3 to control the rotation speed of the motor 3. Then, when the predetermined time W has elapsed, the control until the temperature T of the room is detected from the temperature sensor 7 and the rotation speed R is transmitted to the motor 3 is repeated until the next operation on the operation unit 6 occurs. For example, when the set sensible temperature is 21 ° C., the set set distance is 140 cm, and the room temperature is 25 ° C., the wind speed is calculated as 1.0 m / s using Equation 1. Then, the rotational speed 500 [rpm] is selected using FIG. 7, and the rotational speed 500 [rpm] is transmitted to the motor 3 to control the rotational speed of the motor 3 to 500 [rpm].

  By doing so, the distance between the place where the user receives the wind and the electric fan becomes clear, so the accuracy of the rotational speed of the motor for generating the wind speed required at the place where the user receives the wind is increased. It is possible to obtain a fan that can.

  In the second embodiment, the distance setting unit 10 uses a method in which a user directly inputs a distance. However, a fan and a user are automatically used by using a distance sensor using ultrasonic waves, lasers, infrared rays, or the like. The method of measuring the distance between the fan and the user can be used as long as the distance between the electric fan and the user is detected.

(Embodiment 3)
A third embodiment will be described with reference to FIG. In addition, about the structure of the electric fan as shown in FIG. 1, and the structure of the control part 8 shown in FIG. 2, it is the same as Embodiment 1, and abbreviate | omits detailed description.

  A part of the operation unit 6 in this embodiment is shown in FIG. As shown in FIG. 9, the operation unit 6 is provided with sensation switches 11a and 11b as sensation setting units. The bodily sensation switch 11a is labeled “hot” on the surface thereof, and is pressed when the user feels “hot” as bodily sensation. On the other hand, the bodily sensation switch 11b is labeled “cool” or the like on its surface, and is pressed when the user feels “cool” as bodily sensation. Hereinafter, an operation when the user presses the sensation switch 11a will be described.

  If the user feels "hot" during the operation of the electric fan, the user feels that the sensor switch 11a is pushed to the control unit 8. In response to pressing of the sensation switch 11a (hot), the control unit 8 performs a process of changing the set sensation temperature. For example, a process for lowering the set temperature is 0.5 ° C. Then, using Equation 1, the wind speed corresponding to the lowered set sensible temperature is obtained, and the rotational speed R at which the motor 3 operates is determined from the correlation between the rotational speed R and the wind speed V in FIG.

  The operation when the user feels "hot" has been described above. However, when the user feels "cool", the sensor switch 11b is pressed to increase the set sensory temperature. In the same manner as in the above process, the rotational speed R at which the motor 3 operates is determined.

  According to such a configuration, the user can drive with an appropriate air volume in accordance with the sensation desired by the user without knowledge of the sensation temperature that is difficult to understand. Moreover, the increase / decrease width of the air volume changes according to the ambient temperature at that time, and it is possible to operate with an appropriate air volume according to the set feeling.

  Further, the configuration of the operation unit 6 is easy for anyone to understand and can be easily operated.

  In addition, in order to prevent erroneous operation, after operating the sensation switches 11a and 11b, a control for rejecting the input of the sensation switches 11a and 11b for a predetermined time may be provided.

(Embodiment 4)
A fourth embodiment will be described with reference to FIG. In addition, about the structure of the electric fan as shown in FIG. 1, and the structure of the control part 8 shown in FIG. 2, it is the same as Embodiment 1, and abbreviate | omits detailed description.

  A part of the operation unit 6 in the present embodiment is shown in FIG. As shown in FIG. 10, the operation unit 6 is provided with air volume setting switches 12a and 12b for increasing and decreasing the air volume. The air volume setting switch 12a has “air volume +” or “air volume UP” on the surface thereof, and is pressed when the user feels “hot” as a bodily sensation and wants to increase the driving air volume. is there. On the other hand, the air volume setting switch 12b has “air volume −” or “air volume DOWN” written on the surface thereof, and is pressed when the user feels “cool” as a bodily sensation and wants to reduce the driving air volume. Is. Hereinafter, an operation when the air volume setting switch 12a is pressed will be described.

  If the user feels "hot" during the operation of the electric fan, the air volume setting switch 12a is pushed to inform the control unit 8. In response to the depression of the air volume setting switch 12a (increase the air volume), the control unit 8 performs a process of changing the set sensory temperature. For example, the user presses the air volume setting switch 12a to actually adjust the air volume, that is, the rotation speed of the motor 3 to obtain a comfortable temperature. In other words, the wind speed V is determined from the correlation between the rotational speed R and the wind speed V in FIG. 4 and the set rotational speed R of the motor 3, and the user is comfortable using the room temperature at this time and Expression 2. The perceived air volume, that is, the perceived temperature at the rotation speed R of the motor 3 is set as the perceived temperature.

  According to such a configuration, the increase / decrease of the air volume can be determined based on the body temperature. Moreover, the increase / decrease width of the air volume changes according to the ambient temperature at that time, and it is possible to operate with an appropriate air volume according to the set feeling.

  Further, the configuration of the operation unit 6 can be used without the user being aware of the sensible temperature, and is easy for anyone to understand and can be easily operated.

  The electric fan according to the present invention controls the rotation of the fan so that the temperature at which the user receives wind is the temperature desired by the user. It is also useful as a technique to be used.

DESCRIPTION OF SYMBOLS 1 Fan main body 2 Fan 3 Motor 4 Strut 5 Base 6 Operation part 7 Temperature sensor 8 Control part 9 Experience temperature setting part 10 Distance setting part 11a, 11b Feeling switch 12a, 12b Air volume setting switch

Claims (4)

A temperature sensor for detecting the temperature in the room;
An operation unit for the user to set the operation of the fan;
A sensible temperature setting unit that is provided in the operation unit and allows a user to input a set sensible temperature;
A motor that rotates the fan;
A control unit for controlling the rotational speed of the motor;
The control unit adjusts the rotation speed of the motor so that the sensory temperature at a predetermined distance from the front of the fan becomes the set sensory temperature based on the room temperature detected by the temperature sensor at regular intervals and the set sensory temperature. Electric fan to control. The operation unit includes a distance setting unit for setting a distance between the place where the user receives the wind and the electric fan,
Based on the distance set by the distance setting unit, the room temperature detected by the temperature sensor, and the set sensory temperature, the rotational speed of the motor so that the sensory temperature at a predetermined distance from the front of the fan becomes the set sensory temperature. The electric fan according to claim 1, wherein the electric fan is controlled. The electric fan according to claim 1 or 2, wherein the sensible temperature setting unit inputs a sensation of a user and calculates a set sensation temperature based on the input sensation and the room temperature detected by the temperature sensor. The operation unit includes an air volume setting unit,
The electric fan according to claim 1, wherein the sensible temperature setting unit calculates a set sensible temperature based on a change amount of an air volume setting input by a user to the air volume setting unit and a room temperature detected by the temperature sensor.

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