JP2959091B2 - Deodorizing device - Google Patents

Description

The present invention relates to hydrogen sulfide, ammonia, various mercaptans,
The present invention relates to a deodorizer for purifying malodorous components such as amines.

2. Description of the Related Art In recent years, deodorizing devices have been introduced into household appliances reflecting the trend toward cleanliness, and among them, a toilet having a deodorizing device mounted on a toilet, which is a source of malodor, has been proposed.

This type of toilet with a deodorizing function is described in, for example,
There is one disclosed in Japanese Patent Publication No. 672. The configuration will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a deodorizing device, which is provided with a blower 6 composed of a fan motor and a bad odor component in a duct 5 having a suction port 3 opening rearward or sideward in the toilet bowl 2 and a discharge port 4 facing the tray. An adsorption member 7 made of activated carbon for storing is provided. Reference numeral 8 denotes a seat switch of the toilet, which is a main body of the apparatus. The seat switch is turned on by sitting down, power is supplied to the fan control circuit 9, and the blower 6 is rotated.

In the above configuration, when a person sits on the toilet, the blower 6 is rotated by the fan control circuit 9 to generate an airflow from the suction port 3 to the discharge port 4, and the air containing the malodorous component at the time of defecation is discharged to the suction port. The odorous components are absorbed and purified when they are sucked in through the adsorption member 7 and discharged through the discharge port 4 into the toilet for deodorization. That is, it is configured to be deodorized only at the time of use.

Problems to be Solved by the Invention Since such a conventional deodorizing device is configured to deodorize only when a person is sitting on a toilet, for example, it does not operate in a small boy's room and also has an odor component attached to a toilet wall surface. May come off and fill the toilet space, causing discomfort. For this reason, other deodorants are used in combination.

Further, in this type of conventional deodorizing apparatus, the activated carbon is used as the adsorbing member, so that the amount of adsorption of the malodorous component is finite. Therefore, when the saturated adsorption amount is reached, the deodorizing effect is lost, so that replacement is necessary. In addition, when the temperature in the toilet rises, depending on the odor component, it may be desorbed in the opposite manner, and on the contrary, the bad odor may increase and the discomfort may increase.

The present invention has been made to solve the above problems, and not only quickly deodorizes at the time of stool, but also automatically deodorizes other than at the time of stool, and does not require replacement of an adsorbing member such as activated carbon. It is an object of the present invention to provide a deodorizing device that is easy to maintain.

Means for Solving the Problems In order to achieve the above object, a deodorizing device of the present invention is provided with a duct having an inlet, an outlet, and a blower, and is disposed in the duct to adsorb and oxidize odorous components at room temperature. The deodorizing catalyst body to be decomposed, a seat switch of a toilet bowl to which a deodorizing device is mounted, a fan control circuit that operates the blower in a Hi mode when the seat switch is on, and the fan when the seat switch is off. And a mode switching circuit for performing on-off control at predetermined intervals in the Lo mode.

Operation With the above configuration, the blower is driven in the Hi mode (large air volume) by the fan control circuit when the drive switch of the device main body is on, that is, when the seating switch in the toilet is closed, with the above configuration. When the quick deodorization is performed and the after-use toilet seat switch is turned off, the mode switching circuit operates to switch the deodorizing air volume to Lo mode (small air volume), and intermittently control the deodorization of the toilet space automatically. Done.

In addition, the deodorizing method uses a deodorizing catalyst that adsorbs malodorous components and then oxidizes and decomposes them at room temperature to convert it to odorless substances and releases it, instead of using physical adsorption as in conventional activated carbon. Can last for

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a sectional view of a deodorizing device showing an embodiment of a toilet according to the present invention.

In FIG. 1, reference numeral 10 denotes a deodorizing device, and a blower 14 driven by a fan motor and an adsorbent such as zeolite or activated carbon for physically adsorbing malodorous components are provided inside a duct 13 provided with a suction port 11 and a discharge port 12. And a metal oxide of gold (Au) and iron (Fe) at a predetermined mixing ratio in a highly dispersed manner, and a deodorizing catalyst 15 is provided. Reference numeral 16 denotes a drive switch for a toilet, which is a main body of the apparatus. Here, a seat switch is closed when a person sits on the toilet. 17 is a blower when the power switch 18 is turned on when the drive switch 16 is closed.
This is a fan control circuit that controls 14 in Hi mode (large air volume). Reference numeral 19 denotes a deodorizing air volume mode switching circuit that operates when the drive switch 16 is in the open state, and a time circuit 20 for driving the blower 14 on and off at a predetermined interval and a drive voltage of the blower 14 are reduced to set the air flow to the Lo mode. (Small air volume).

Next, the operation of the above configuration will be described. When seated on the toilet during defecation, the drive switch (seating switch) 16 is closed, the blower 14 operates in the Hi mode (large air volume), and the suction port 11
A large air flow from the outlet to the outlet 12 is generated, and the offensive odor component at the time of defecation is sucked from the inlet 11 and is once physically adsorbed on the catalyst body 15 having the adsorbent as a carrier, and rapid deodorization is performed. . The purified air is discharged from the outlet 12 into the toilet. At this time, the air volume needs to be 0.1 m ³ / min or more.

On the other hand, when the user exits the toilet after using the toilet, the drive switch 16 is opened, the power supply 18 is automatically turned on to the mode switching circuit 19, and as shown in the time chart of FIG. (Small air volume), and is driven on and off by the timed circuit 20 at predetermined intervals. Note that the air volume at this time is set to such an extent that the blowing sound of the blower 14 is not generated. This prevents noise when deodorizing in a quiet state such as at midnight. This is particularly suitable for multi-family dwellings or housing structures where the bedroom and toilet are adjacent.

Next, the deodorizing mechanism of the catalyst 15 will be described. When the air containing the malodorous component passes through the catalyst body 15, it comes into contact with the surface of the carrier mainly composed of an adsorbent such as zeolite, and the malodorous component is effectively adsorbed on the fixed surface having a large adsorption surface area, and Are alleviated and released. Thereby, deodorization is effectively performed. At this time, if the catalyst body 15 is formed in a honeycomb shape, the pressure loss during the passage of air can be reduced.

Although the mechanism in this regard has not been fully elucidated, zeolite is used as a carrier and a metal oxide of gold and iron is supported. The adsorbed malodorous component is activated, and an oxidative decomposition reaction occurs in a normal temperature atmosphere to decompose the malodorous component. That is, if left in an oxygen coexisting atmosphere (atmosphere), the adsorbed malodorous molecules are deodorized and released, so that the deodorizing effect is maintained for a long time as compared with the method using physical adsorption such as activated carbon. In this case, the reaction rate is relatively slow, and the malodorous component is once adsorbed on the carrier and then gradually reacted. Therefore, it is suitable for deodorization at a relatively low concentration, and more suitable for intermittent deodorization than continuous use. Further, gold (Au) has a low affinity for water, so that it can maintain high activity even in the presence of water as compared with, for example, platinum (Pt).

As described above, according to the present embodiment, when the drive switch (seating switch) 16 of the device body is turned on, the blower 14 is continuously driven in the Hi mode to perform quick deodorization.
When the device 16 is in the off state, the deodorizing mode switching circuit 19 automatically operates to drive the blower 14 in the Lo mode and to control the on / off operation, so that the toilet space can be deodorized even when the device body (toilet seat) is not used. This can be performed effectively, and the seat switch 16 is also used as the operation detecting means of the blower 14 air volume switching circuit 21, so that it is not necessary to provide another detecting means, and the configuration can be simplified and the cost of the apparatus can be reduced. .
When deodorizing in Lo mode, it is driven with low noise, so that noise pollution can be prevented.

In addition, the deodorizing catalyst 15 supports a metal oxide of gold (Au) and iron (Fe) by using an adsorbent having a large surface area such as zeolite as a support, so that it efficiently adsorbs malodorous components and deodorizes it. , It is oxidatively decomposed and regenerated, so that the deodorizing effect is maintained over a long period of time, and it is not necessary to replace it frequently than activated carbon or the like, and maintenance is facilitated.

FIG. 3 is a partial circuit diagram of a deodorizing apparatus according to another embodiment of the present invention.
a is composed of an odor sensor 22 for detecting the presence of an odor component, a detection circuit 23 for driving and controlling the blower according to the signal level of the odor sensor 22, and an air flow switching circuit 21 for setting the air flow of the blower to Lo mode. Things. The other parts are the same as those of the embodiment shown in FIG.

According to this embodiment, only when the signal of the odor sensor 22 has reached a predetermined level, that is, only when an odor having a concentration equal to or higher than the detection threshold is detected, the deodorization in the Lo mode is performed. Since it operates only when deodorization is required, power consumption can be reduced and the life of the blower 14 can be extended.

Further, Hi mode and Lo mode deodorization control may be performed according to the magnitude of the signal level of the odor sensor 22, that is, the magnitude of the odor concentration.

Effect of the Invention As described in detail above, the present invention provides a mode switching circuit that controls a deodorizing blower based on a signal of a seat switch that detects activation of a toilet device, and adsorbs malodorous components at room temperature as a deodorizing element. And a deodorizing catalyst that oxidizes and decomposes, and the following effects can be obtained.

(1) Since the deodorizing blower is controlled based on the signal of the seat switch, the toilet is quickly deodorized in the Hi mode and the toilet switch in which the seat switch is off when the stool is in the ON state. Since the blower is intermittently deodorized in the Lo mode at the time of use or for men's small use, the entire tray space can be effectively deodorized, and the use of another deodorant is unnecessary. Also, when operating in the Lo mode, the air volume is low and the air is intermittently blown, so that power saving and noise reduction can be achieved.

(2) Since the signal of the seating switch for detecting the timing of energizing the heating toilet seat and the like is also used as the control timing detection switch of the deodorizing blower, there is no need to provide a dedicated detection element. Thereby, the configuration of the deodorizing device can be simplified and the cost can be reduced.

(3) Since a composite metal oxide of gold and iron is highly dispersed and supported on a support mainly composed of zeolite as a deodorizing element, malodorous components can be adsorbed and oxidatively decomposed at room temperature. This eliminates the need for auxiliary means such as heating of the catalyst or supply of ozone, and can be implemented with a simple configuration equivalent to that of an adsorbent such as activated carbon, thereby reducing costs and, since the deodorizing effect lasts for a long time, hassle of replacement. Can be largely omitted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a deodorizing apparatus according to one embodiment of the present invention,
FIG. 2 is an operational characteristic diagram of the blower of the apparatus, FIG. 3 is a circuit diagram showing another embodiment of the present invention, and FIG. 4 is a sectional view of a conventional deodorizing apparatus. 10 …… Deodorizer, 11 …… Suction port, 12 …… Discharge port, 13 ……
Duct, 14 ... Blower, 15 ... Catalyst, 16 ... Drive switch, 17 ... Fan control circuit, 19, 19a ... Mode switching circuit, 20 ... Timed circuit, 21 ... Air volume switching circuit, 22 ... ... odor sensor, 23 ... detection circuit.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Ikuo Matsumoto 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A 1-295932 (JP, A) JP-A 62-132592 (JP, A) JP-A 1-227727 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 9/00-9/16

Claims (2)

(57) [Claims] 1. A duct having an inlet, an outlet, and a blower, a deodorizing catalyst disposed in the duct and adsorbing and oxidatively decomposing malodorous components at normal temperature, and a toilet seat to which a deodorizing device is attached. When the switch and the seating switch are on,
A deodorizing device comprising: a fan control circuit that operates the blower in a Hi mode; and a mode switching circuit that controls the blower to be turned on and off at predetermined intervals in a Lo mode when the seat switch is off. 2. The deodorizing catalyst according to claim 1, wherein a composite metal oxide of gold (Au) and iron (Fe) is highly dispersed and supported at a predetermined ratio on a support mainly composed of zeolite. Deodorizing equipment.