JPH04161736A - Automatic ventilation fan - Google Patents

Abstract

PURPOSE:To raise exhausting power under a condition of odor filled and to remove the odor with a low exhausting power under a normal condition by a method wherein a fan motor of a ventilation fan is operated in a weak notch operation or a strong notch operation by a fixed remaining timer alpha or beta based on a discrimination condition whether the time from a first person detecting signal to a last person detecting signal reaches a prescribed time. CONSTITUTION:With respect to the time TA from a first person detecting signal A to a last detecting signal D, considering a prescribed time as TB, a condition discrimination whether TA>=TB or TA>TB is made. When a user goes out of a toilet 1, and the result of a condition discrimination is TA>TB, a fan motor 12 is operated in a weak notch operation for a time of T0+Talpha+alpha. On the other hand, when the result of the condition discrimination is TA>=TB, the fan motor 12 is operated in the weak notch operation for a time of T0+Talpha, and then in a strong notch operation for a time of beta. The alpha or beta are prescribed remaining timers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatically operated ventilation fan that automatically ventilates a specific ventilation main part, that is, a specific room such as a toilet.

2. Prior Art] The above-mentioned conventional ventilation fan of this kind is, for example,
The structure is as disclosed in Japanese Patent Application Publication No. 7599 and Japanese Patent Application Laid-Open No. 63-204047. Figures 2 to 6 show an automatic ventilation fan for a toilet disclosed in Japanese Patent Application Laid-Open No. 63-204047. is attached, and this detection output signal is input to the human body determining means 3. The human body determining means 3 determines whether or not a person has entered the toilet 1, and based on this result, the ventilation fan 4 operating time determining means 5 determines the operating time of the ventilation fan 4. Based on this, the ventilation fan 4 is operated by the ventilation fan driving means. Drive with 6. Figure 4 shows the principle diagram of the human body detector 2, which is a pyroelectric infrared sensor 7.
, amplification amplifier 8, comparator 9 and timer 10
It consists of As shown in FIG. 5, the detection output of this human body detector 2 becomes H and signal A when the door opens and a person is detected. Next, each time a person moves in the toilet 1, the detection state becomes H, and the signal becomes B, a double signal.

Finally, when a person leaves the toilet 1, the resulting change in infrared rays is detected and a signal is output.

The operating time of the ventilation fan 4 is determined by the ventilation fan operation time determining means 5 as follows9. That is, the time that has elapsed the longest from one human body detection state to the next detection state is time To. Therefore, if the ventilation fan 4 is operated for a period of To + Tα equal to or longer than To upon one detection of a human body, the ventilation fan 4 will be automatically operated during use.

Furthermore, generally speaking, the longer the time TA from the first human body detection signal A to the last detection signal, the more odor is trapped. From these facts, the operating time 1r of the ventilation fan 4 is the time T
The time α(TA> corresponding to the ratio of A is T.To+α(TA>), which is the time obtained by adding ten Tα.

[Problems to be Solved by the Invention] This type of automatically operated ventilation fan described above has a first human body detection signal A.
The longer the time TA from the time to the last detection signal, the longer the remaining timer time (α (TA>) described above), which is the time to operate for odor removal after a person leaves the room, becomes longer, and the exhaust volume increases. However, when Toy ν1 is crowded and used continuously, such as at one o'clock in the morning, the remaining timer time becomes longer after being used for a long time, so the previous odor evacuation There are problems that need to be solved, such as the device being used before the process is completed, causing discomfort to the next user.

This invention was made in order to solve such conventional problems, and the purpose is to obtain an automatically operating ventilation fan that can quickly remove odors even after long use and can perform ventilation operation with higher comfort. It is something to do.

[Means for Solving the Problems] The self-operating ventilation fan according to the present invention has a fan motor of the ventilation fan with two taps, which enables air volume control in two stages of strength and weakness. It is calculated whether the time between receiving the detection signal has reached a predetermined time or not, and if it has not reached a predetermined time, the fan motor is operated in a weak notch operation using a fixed remaining timer α, and when it has reached a fixed timer β. The fan motor is operated in a strong notch operation using a remaining timer.

[Operation] In the self-driving ventilation fan of the present invention, a fixed value of α is determined based on the condition for determining whether the time from the first human body detection signal to the latest human body detection signal has reached a predetermined time. The remaining timer or the fixed remaining timer β can be used to operate the fan motor of the ventilation fan in a weak or strong notch, and in situations where odors are trapped, the exhaust power is increased by 3 to quickly remove odors. It becomes possible to remove odors with low exhaust power.

[Embodiment] Figs. 1 to 5 all show embodiments of the present invention, and since the respective countries shown in Figs. 2 to 5 are the same as the conventional example, they will be referred to as they are. Therefore,
In each drawing, the same reference numerals indicate the same or corresponding parts. FIG. 1 shows an embodiment of a control circuit for an automatically operating ventilation fan according to the present invention, which corresponds to the conventional example shown in FIG. That is, 4 connects the fan motor 1 to the commercial power supply 11.
The ventilation fan 2 is connected to the toilet 1 and is attached to the wall or ceiling as shown in Figure 2. The fan motor 12 is connected to a circuit including a phototriac 13 and a transistor 14 for weak notch operation, and a circuit including a phototriac 15 and a transistor 16 for strong notch operation, and is connected to a microcomputer (hereinafter referred to as microcomputer) 1.
7.

A human body detector 2 is attached to a position facing the door of the toilet 1, and the detection output signal is inputted to a human body determining means 3. The human body determining means 3 determines whether or not a person has entered the toilet 1, and based on this result, the ventilation fan 4 operating time determining means 5 determines the operating time of the ventilation fan 4. Based on this, the ventilation fan 4 is operated by the ventilation fan driving means. Drive with 6. FIG. 4 shows a principle diagram of the human body detector 2, which is the same as the conventional example described above. As shown in FIG. 5, the detection output of this human body detector 2 becomes H and signal A when the door opens and a person is detected. Next, each time a person moves in the toilet 1, the detection state becomes H, and the signal becomes B, a double signal. Finally, when a person leaves the toilet 1, the resulting change in infrared rays is detected and a signal is output.The output of the human body detector 2 is inputted to the microcomputer 17 from an input terminal 18. Microcomputer 17
The output of the automatic/manual switching circuit is input to the other input terminal.

When automatic operation is selected in the automatic/manual switching circuit, the microcomputer 17 determines whether a signal from the human body detector 2 is being input, and if not, it waits for an input from the human body detector 2. It turns out. If it is in the input state, it is determined that it is the first human body detection state, and the fan motor 12
And one illuminator of toilet 1 is set as To1T as in the conventional example.
A weak notch is activated and the light is turned on during α time. To is the time that has elapsed the longest from one human body detection state to the next detection state. Note that if a large number of human body detection signals are received within a short period of time, the stopped state is maintained based on the judgment of the microcomputer 17 because it is considered that there is an influence of electromagnetic wave noise. After the first human body detection signal is input, that is, after the user starts using the toilet 1, the human body detector 2 continues to send human body detection signals to the microcomputer 17 when the user moves even a little while using the toilet. determines this as a human body detection state, and each time it receives a human body detection signal, the TO officer Tα
A timer is set to operate the ventilation fan 4 at a low air volume with a low notch operation for a certain amount of time. Further, the time TA from the first human body detection state to the reception of the latest human body detection signal is measured, and it is calculated whether the preprogrammed TB waiting time has been reached. That is, the time TA from the first human body detection signal A to the last detection signal is determined as to whether TA≧TB or TA>TH for a certain predetermined time TB. Then, when the user leaves the toilet 1, if the condition determination is TACTB, the fan motor 12 is operated in a weak notch operation for a period of 'rα+α.

This α is a predetermined remaining timer. Further, when the condition determination is TA≧TB, the fan motor 12 is operated in a weak notch operation for the time TO+Tα, and then the fan motor 12 is operated in a strong notch operation for the time β. This β is a predetermined remaining timer. After receiving the last human body detection signal, unless the ventilation fan 4 receives a human body detection signal again while it is operating, the ventilation fan will be stopped after the above-mentioned time has elapsed.

Therefore, the longer the time TA from the first human body detection signal A to the last human body detection signal, the longer the time required for driving to remove odors after a person leaves the room, and the longer the time TA from the first human body detection signal A to the last human body detection signal Even if the toilet is crowded and used continuously, the strong odor can be quickly removed after using toilet 1 for a long time, so the next user will not feel any discomfort. This eliminates most of the nuisance and further improves the comfort of the toilet.

Note that the circuit of the illuminator 19 is also linked, but since this is not the main point, only the circuit diagram will be shown and its explanation will be omitted.

[Effects of the Invention] As described above, the automatically operated ventilation fan of the present invention determines the remaining air volume of the ventilation fan based on the signal from the human body judgment means, and increases the exhaust power in situations where odor is trapped in the toilet. Since the exhaust force is lowered in certain situations, the odor can be removed quickly even when used continuously, and the user will hardly feel uncomfortable.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of the main part showing one embodiment of the control circuit of an automatically operating ventilation fan according to the present invention, and Figs. 2 to 5 show an embodiment of the present invention together with a conventional example. Figure 2 is a configuration diagram showing the self-operating ventilation fan along with the toy, Figure 3 is a configuration diagram of the control section, Figure 4 is a principle diagram of the human body detector, and Figure 5 is the detection of the human body detector. Output Explanation Diagram 5 FIG. 6 is an electrical circuit diagram of a main part showing a control circuit of an automatically operated ventilation fan as a conventional example. In the figure, 1 is a toilet, 2 is a human body detector, 3 is a human body judgment means, 4 is a ventilation fan, 5 is a ventilation fan operation time determining means, 6 is a ventilation fan driving means,
12 is a fan motor, 13.15 is a phototriac, and 17 is a microcomputer. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent: Masuo Oiwa (and 2 others) Figure 1 Figure 2 Figure 5 Figure 2 Title of the invention Self-driving ventilation fan 3 Person making the amendment 5 FIA positive subject matter A II g) Column for detailed description of the invention. 6 Contents of correction (1), 41i117) The description in 23rd ir, line 14, r, Fig. 6 is corrected to ``Fig. 2 and 3I2I.'' (2) Each r on page 9, line 6 and line 8 of the same page of the specification.
TA > T B The description of J is γ and rTA < T
Correct it as "B". that's all

Claims (1)

[Claims] A human body detector that detects heat emitted by a person, a human body determining means that determines whether a signal from the human body detector is from a human body, and an operation of a ventilation fan for a toilet based on the signal from the human body determining means. It is equipped with a ventilation fan operation determining means that determines the time, and a ventilation fan drive means that controls energization of the ventilation fan based on a signal from the ventilation fan operation determination means, and the fan motor of the ventilation fan is variable in air volume in two stages of strength and weakness. At the same time, it calculates whether the time from the first human body detection signal from the human body determination means to the latest human body detection signal has reached a predetermined time, and if it has not reached a predetermined time, a fixed value of α is calculated. The automatic operation ventilation fan is characterized in that the fan motor is operated in a weak notch operation by a residual timer, and when the residual timer reaches β, the fan motor is operated in a strong notch operation by a fixed residual timer β.