JPH0315839Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to an electric fan that automatically adjusts the air volume in response to changes in room temperature, and in particular relates to improvements in display means for indicating the operating status of the fan.

(B) Conventional technology Conventionally, electric fans that control the rotation of the fan motor in response to changes in room temperature have set a comfortable room temperature, and when the room temperature is higher than the set room temperature (hereinafter referred to as set temperature), It operates continuously, and conversely, if the room temperature is lower than the set temperature, the operation is stopped. The room temperature during operation is shown to the user by a temperature display installed on the base of the fan, and the user can also determine the optimal air flow rate (Utility Model Publication No. 83293/1983). ).

However, since the display for displaying the optimum air volume and the temperature display are provided separately, or only the air volume display is provided, the user may be confused as to which air volume should be used during operation. Ta. Additionally, models without a temperature indicator were inconvenient because the room temperature during operation was unknown.

(c) Problems to be solved by the invention This invention was made in view of the above circumstances, and since the air volume in the operating state and the room temperature at that time are displayed on one display, the relationship between the air volume and temperature is The purpose of this invention is to provide an electric fan that makes it clear and allows accurate confirmation of the air volume.

(d) Means for Solving the Problems The present invention has a room temperature detection means that outputs an electric signal corresponding to a change in the room temperature, and a fan motor rotation based on the output signal output from the room temperature detection means. An electric fan comprising a drive control means for controlling the electric fan, characterized in that one display means is electrically connected to the drive control means to display the magnitude of the air volume in the operating state and the room temperature at that time. It is.

(E) Function Since the air volume during operation and the room temperature are displayed, the air volume during operation and the room temperature at that time can be immediately determined.

(F) Example The example of this invention will be described below in detail with drawings.
This invention is not limited to the following examples.

In FIG. 1, reference numeral 1 denotes a fan motor, which is provided at the upper end of a stand 2 so as to be movable left and right. A fan 3 is fixed to the rotating shaft of the fan motor 1, and a protective net 4 is provided on the front and rear surfaces of the fan 3. Reference numeral 5 denotes a stand, which is fixed to the lower end of the stand 2 and has an operation panel 6 attached to its upper surface. On the operation panel 6, a power off switch 7, a temperature detection operation switch 8, a room temperature detection operation indicator 9, and a room temperature detection means 10 are arranged substantially in a straight line, and a display means 11 is provided at a position behind the power cutoff switch 7.

Next, the configuration of the electrical control section of this embodiment will be explained with reference to FIG.

Reference numeral 12 denotes a drive control means, which is composed of a temperature comparison circuit 13, an air volume adjustment circuit 14, and a fan motor drive circuit 15. The temperature comparison circuit 13 is the room temperature detection means 1
0, and compares the set temperature provided therein with the electrical signal output from the room temperature detection means 10, and when the electrical signal matches the set temperature, sends an air volume switching signal to the air volume adjustment circuit 14. Output.
In addition to the temperature comparison circuit 13, the air volume adjustment circuit 14 is electrically connected to a power cut-off switch 7, a temperature detection operation switch 8, a room temperature detection operation display 9, a display means 11, and a fan motor drive circuit 15. . The fan motor 1 is electrically connected to the fan motor drive circuit 15 to constitute the electric control section of this embodiment.

Next, the operation of the electric fan of this embodiment will be explained with reference to FIG.

First, when the temperature detection operation switch 8 is operated,
The air volume adjustment circuit 14 outputs a signal to the room temperature detection operation indicator 9 to activate the room temperature detection operation indicator 9. The room temperature detection operation indicator 9 may be, for example, a miniature bulb, and may be turned on during the room temperature detection operation (indicated by X in FIG. 3C) and off at other times. The room temperature detection operation display 9 or a liquid crystal display displaying characters such as "operating" may be used. The electrical signal from the room temperature detection means 10 is successively compared with the set temperature in the temperature comparison circuit 13. At this time, if the electrical signal output by the room temperature detection means 10 matches the set temperature, the temperature comparison circuit 13 outputs an air volume switching signal to the air volume adjustment circuit 14. The air volume adjustment circuit 14 operates the fan motor drive circuit 15 in order to rotate the fan motor 1 at the air volume selected by the air volume switching signal. In this embodiment, there are 10 temperature settings ranging from 25°C to 34°C at intervals of 1°C, and the air volume is set to correspond to each room temperature. Therefore, as shown in Figure 3A, if the room temperature is, for example, about 28°C, the air volume is as follows, with the smallest air volume being notch 1 and the maximum air volume being notch 10.
It starts at notch 4 and switches every time the room temperature rises by 1°C, and when the room temperature exceeds 34°C, it operates continuously at notch 10, which is the maximum air volume. Conversely, when the room temperature gradually decreases, the air volume decreases accordingly, and when the room temperature drops below 25°C, the operation is stopped. During this time, as the air volume is switched, the air volume at that time is displayed on the display means 11. FIG. 3C shows an enlarged view of the operation panel 6. The display means 11 is, for example, a light emitting diode array, which is divided into 10 equal parts corresponding to the air volume.
One of the equally divided elements lights up. That is, if the airflow rate is set to notch 5, for example, five elements of the display means 11 will light up from the left side (indicated by X in the figure). This also indicates that the room temperature is 29°C, and since the air volume corresponding to the set temperature is determined by the temperature comparison circuit 13, it also serves as a temperature display.

In the above embodiments, the air volume was adjusted in stages for room temperature (stepped air volume adjustment).
If a phase control method using a thyristor or the like is used in the fan motor drive circuit 15, the air volume can be adjusted steplessly in accordance with changes in room temperature (stepless air volume adjustment). In this case, the display means 11 is not divided into 10 equal parts, but is divided into even smaller parts.

As another embodiment, an operation setting switch may be provided so that operation at a desired air volume can be performed manually. In this case, the air volume changes in steps each time the operation setting switch is operated, and by checking the display means, the air volume can always be operated at an appropriate air volume.

(g) Effects of the invention According to this invention, since the air volume and room temperature during operation are displayed on a single display means, the relationship between the air volume and temperature can be confirmed at a glance, and the fan can provide an appropriate air volume. is obtained. Additionally, since it detects room temperature, it can be used as a simple thermometer and contributes to creating a comfortable environment.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of this invention, Fig. 2 is a block diagram showing the configuration of the electric control section of the embodiment, and Fig. 3 is a perspective view of an embodiment of the invention.
FIG. 3A is a graph showing changes in room temperature during operation, FIG. 3B is an explanatory diagram of the operation corresponding to FIG. 3A, and FIG. 3C is an explanatory diagram showing the state of the display means during operation. 1...Fan motor, 10...Room temperature detection means,
11... Display means, 12... Drive control means.

Claims (1)

[Scope of utility model registration request] In an electric fan that includes a room temperature detection means that outputs an electric signal corresponding to a change in the room temperature, and a drive control means that controls the rotation of a fan motor based on the output signal output from the room temperature detection means, it is possible to An electric fan characterized in that a display means for displaying a display and a room temperature at that time is electrically connected to a drive control means.