JPH03118818A - Deodorizing device - Google Patents

Abstract

PURPOSE:To prevent undecomposed odor gas and excess ozone from leaking out into a room, etc., by heating adsorbent to regenerate the adsorbing function while a fan is stopped, and decomposing the odor material in the odor gas generated thereby with the ozone from an ozone generator. CONSTITUTION:The odor material is adsorbed by the adsorbent 7 and the gas contg. odor is forcedly sucked from a odor source side by a fan 9, and the gas deodorized with adsorbent 7 is discharged from an exhaust gas opening 3 provided in the lower side of the adsorbent 7. The adsorbent 7 is heated by a heater 8 when the fan 9 is stopped to desorb the odor material adsorbed to the adsorbent 7 to regenerate the adsorbing function. The ozone generator 4 is disposed in the upper part of the adsorbent 7 to decompose the odor material in the gas contg. odor, and the odor contained gas desorbed from the adsorbent 7 by heating with the heater 8 is naturally ascended to be deodorized. By this simple constitution of device, undecomposed odor gas and excess ozone are not leaked into a room, etc., when the adsorbent is regenerated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention J (Field of Industrial Application) This invention relates to a deodorizing device that deodorizes contaminated air mainly generated in the home.

(Prior Art) In order to purify contaminated air containing various malodorous substances generated in the home, deodorizing devices equipped with various deodorizing methods have been considered. Among these, the most commonly used deodorizing method is one in which deodorization is performed by physically adsorbing molecules of odor substances using an adsorbent, typically activated carbon. However, since this method deodorizes by physical adsorption, the adsorption capacity is determined by the amount of adsorbent such as activated carbon.

Therefore, the life of the adsorbent is relatively short, and maintenance such as replacement of the adsorbent is required.

In response to this, a method has been proposed in which the adsorbent is regenerated by heating to extend its life, as disclosed in Japanese Patent Publication No. 59-12935, for example. By the way, when the adsorbent is regenerated by heating, concentrated odor substances are re-released from the adsorbent.

This re-released odorous substance must be decomposed and removed by other means. This conventional technique uses a method of decomposing and removing this using a thermal decomposition type catalyst.

This thermal decomposition type catalyst is designed to cause a decomposition effect when heated.

Another method for decomposing and removing odor substances re-released from the adsorbent is a method using ozone. This method has the advantage that it does not require heating unlike a thermal decomposition type catalyst. However, since ozone is harmful, it is necessary to devise measures to prevent excess ozone from leaking out of the ozone used to decompose odorous substances. For this reason, conventional methods that use ozone to decompose odorous substances have been put into practical use that combine an ozone generator and an ozone decomposition deodorizing catalyst.

A deodorizing device that uses ozone to decompose odorous substances has an adsorbent, a heater for heating and regeneration, an ozone generator, and an ozone decomposition deodorizing catalyst arranged in this order from the upstream side of the odorous gas. There is. During deodorization, the odorous substances in the odorous gas are physically adsorbed onto the adsorbent and removed. When the adsorbent is saturated with odorous substances and deodorizing efficiency decreases, the adsorbent is heated and the re-released odorous gas is mixed with ozone generated by an ozone generator, and the odorous substances are removed on the ozone decomposition deodorizing catalyst. Disassemble. At this time, excess ozone is also decomposed by this ozone decomposition and deodorization catalyst, and odor and excess ozone are not released from the exhaust port.

After the odorous substances have been sufficiently released from the adsorbent, the adsorbent is cooled and has deodorizing ability again.

However, in this type of deodorizing device, when the ozone decomposition performance of the ozone deodorizing catalyst deteriorates, there is a risk that excess ozone will be released from the exhaust port into the room or the like. In addition, when heating and regenerating the adsorbent, odor must not leak from the exhaust port, so this type of deodorizing equipment generally reduces the processing air volume during this regeneration, compared to when deodorizing, depending on the decomposition ability of the ozone deodorizing catalyst. must be dropped. However, if this is done with one fan, control becomes complicated. To avoid this, there is a method to install two fans, one large and one small, and use a damper to change the air volume during deodorization and regeneration.
This will complicate the functionality. Further, this ozone decomposition deodorizing catalyst is quite expensive among deodorizing devices, and increasing the size of the deodorizing device in order to increase its decomposition ability is not preferable because the price of the deodorizing device becomes high.

(Problems to be Solved by the Invention) Conventional deodorizing equipment equipped with an adsorbent, a heater for heating and regeneration, an ozone generator, and an ozone deodorizing catalyst are designed to remove excess ozone when the ozone decomposing performance of the ozone deodorizing catalyst deteriorates. may leak into the room, etc. If the processing air volume is reduced during playback to prevent this, fan control etc. will become complicated. On the other hand, increasing the decomposition ability of the ozone decomposition and deodorization catalyst increases the size of the device and increases costs.

Therefore, the present invention provides a deodorizing device that does not use an ozone decomposition deodorizing catalyst, has a simple device configuration, and does not leak undecomposed odor gas or surplus ozone into a room during regeneration of an adsorbent. The purpose is to

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention includes an adsorbent that adsorbs odorous substances, and an adsorbent that forcibly sucks odor-containing gas from the odor source side and adsorbs the odor-containing gas. The adsorption function includes a fan that sends out the gas after deodorization by the agent from an exhaust gas port provided on the lower side of the adsorbent, and an adsorption function that heats the adsorbent when the fan is stopped and releases the odor substances adsorbed by the adsorbent. a heater that regenerates odor, and a heater that is placed above the adsorbent in which the odor-containing gas released from the adsorbent by heating the heater naturally rises, and generates ozone that decomposes the odor substance in the odor-containing gas. The gist is to have an ozone generator.

(Function) During deodorization, gas containing odors is forcibly sucked into the device by the drive of the fan, and the odorous substances are physically adsorbed by the adsorbent and the gas, which has become odorless, is placed below the adsorbent. It is sent into the room etc. from the exhaust gas port. If the adsorbent becomes saturated with adsorption and deodorizing ability decreases after being used for an appropriate period of time, the adsorbent will be heated by the heater while the fan is stopped, and the adsorbed odorous substances will become concentrated odorous gas. released. Because the odorous gas is heated when it is released, it naturally rises, and the odorous substances are decomposed and deodorized by ozone generated by an ozone generator placed above it. At this time, the upper part of the ozone generator is almost blocked by a ventilation pipe or the like leading to the odor source, but it may be blocked by a damper or the like. Since the excess ozone is heated, it is catalytically decomposed on the surface of the adsorbent, and does not leak into the room from the exhaust gas port provided below the adsorbent.

Therefore, an ozone decomposition and deodorization catalyst is not required, and since the fan is stopped during regeneration, there is no need to control the air volume.The simple device configuration eliminates the need for undecomposed odor gas and surplus during adsorbent regeneration. It becomes possible to prevent ozone from leaking into the room.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 and FIG. 2 are diagrams showing an embodiment of the present invention. This embodiment is applied to a deodorizing device attached to a toilet bowl.

As shown in FIG. 2, the deodorizing device 10 of this embodiment is attached to the side of a tank in a toilet bowl in the direction of gravity, that is, in the vertical direction.

First, the configuration of the deodorizing device will be explained using Fig. 1. In the figure, 1 is a cylindrical case body, and a ventilation pipe 2 leading to the toilet bowl, which is the odor source, is connected to the upper part of the case body. An exhaust port (exhaust gas port) 3 is opened at the bottom for sending out the deodorized gas. Inside the case body 1, an ozone generator 4, an adsorbent 7 using activated carbon, a heater 8 for heating and regeneration, a turbo fan 9, and a motor 11 for driving the same are installed in order from the upper side. There is.

The ozone generator 4 has electrodes provided on the front and back surfaces of a ceramic plate, and high-frequency high-pressure gas is applied to the electrodes from the outside through a conductor 5 by a high-frequency high-voltage power supply 6 to generate ozone.

Case body 1 between the far-throwing part to the ventilation pipe 2 and the adsorbent 7
The inner wall of the ozone generator 4 is exposed to the ozone generated by the ozone generator 4. In particular, when the temperature is high, it is easily oxidized by the highly active nascent oxygen O produced during ozone decomposition. For this reason, it is preferable that the inner wall of the case body 1 between the two is coated with a material having good corrosion resistance, such as ceramic or stainless steel. Further, the turbo fan 11 is driven only during deodorization to forcibly suck odor gas into the case body 1, and its air volume is such that when a person sits on the toilet bowl (described later), the odor flows back from the toilet bowl. It is set at about 0.3m3/min, which is such that it will not come out. As the adsorbent 7, about 200 g of activated carbon is used so that the odor does not leak out from the exhaust port 3 when this amount of odor gas is ventilated.

FIG. 2 shows the above-described deodorizing device 10 mounted on a toilet bowl.

In Figure 2, 16 is a toilet bowl, 17 is a rim hole for discharging water, 1
8 is a water conduit, and the water conduit 18 communicates with the tank 21 via a float valve 19.

When the float valve 19 is opened via the chain 23 by operating the lever 22, water in the tank 21 is allowed to flow from the water pipe 18 through the rim hole 17 into the toilet bowl 16.

After the water has been drained, water is supplied into the tank 21 through the water supply pipe 24, and the buoyancy of the floating balls 25 closes the valve 26, so that the water supply is stopped at an appropriate amount. 27 is an overflow pipe for stopping overflow, and 28 is a connecting pipe, and this connecting pipe 28 also originally has the function of preventing overflow. This connecting pipe 28 is connected to the ventilation pipe 2.
The odor gas generated in the toilet bowl 16 flows through the rim hole 17.
, the water pipe 18 , the overflow pipe 27 , the connecting pipe 28 and the ventilation pipe 2 to be taken into the deodorizing device 10 . The introduction path for the odor gas from the rim hole 17 to the ventilation pipe 2 is meandering and relatively long, and is cooled along the way. Therefore, when the turbo fan 9 is stopped during heating and regeneration of the adsorbent 7, the upper part of the deodorizing device 10 is almost blocked, and the odor gas released from the adsorbent 7 is prevented from flowing back. Become.

Next, the operation of the deodorizing device 10 configured as described above will be explained.

When the turbo fan 9 is driven during deodorization, the odor gas generated in the toilet bowl 16 is sucked through the rim hole 17, and the water pipe 1
8. The introduced odorous gas is introduced into the deodorizing device 10 through the paths of the overflow pipe 27, the connecting pipe 28, and the ventilation pipe 2, and the odorous substances in the gas are physically adsorbed by the adsorbent 7 and are made odorless. , deodorized air is sent out from the exhaust port 3.

Assuming that the above-mentioned amount of activated carbon is used as the adsorbent 7, and it is operated 3 times/day for 5 minutes each time by a family of about 4 people, the effectiveness of the adsorbent 7 will decrease over a period of about a week, and an odor will be emitted from the exhaust port 3. begins to leak. At this time, the adsorbent 7 is heated and regenerated.

During regeneration, the turbo fan 9 is first stopped.

When the turbo fan 9 is stopped, the upper part of the case body 1 is almost closed, as described above.

Next, the heater 8 is energized to heat the adsorbent 7.

At the initial stage of heating, the temperature was increased at 20°C/min, and the temperature was increased to 80°C/min.
After reaching °C, heat at this temperature for 15 minutes.

Due to this heating, the odorous substance adsorbed on the adsorbent 7 is released as concentrated odorous gas. Since the odor gas at the time of release is heated and has a high temperature, it naturally rises as shown by the black arrow in Figure 1, and the odor gas is absorbed by the ozone generated from the ozone generator 4 placed above it. Decomposed and deodorized.

At this time, excess ozone is decomposed catalytically on the surface of the adsorbent 7 because it is heated, and does not leak out from the exhaust port 3 provided below the adsorbent 7. . In addition, since the odor gas released from the adsorbent 7 naturally rises and is deodorized as described above, it does not leak out from the exhaust port 3 like surplus ozone. After the regeneration is completed, the adsorbent 7 is cooled and is given deodorizing ability again.

As described above, in this embodiment, leakage of odorous gases etc. released from the adsorbent 7 can be easily prevented during regeneration without using a switching damper.

In addition, in the conventional example, when regeneration is performed with a processing air volume of 0.3 m3/m 1 n, - with an ozone decomposition deodorizing catalyst in the membrane, when the SV value is 10000 h-1, it is 1.8 fL.
amount of catalyst is required, which is disadvantageous in terms of storage space and cost. However, in this embodiment, such an ozone decomposition and deodorization catalyst is not required, and the processing air volume is automatically adjusted slightly because the processing is performed using the upward airflow generated when the turbo fan 9 is stopped and the adsorbent 7 is heated. becomes possible.

Next, FIGS. 3 and 4 show another embodiment of the present invention.

Incidentally, in FIGS. 3 and 4, the same or equivalent components as those in FIG. 1 are designated by the same reference numerals, and redundant explanation will be omitted.

As described above, in one embodiment, the odor gas introduction path including the ventilation pipe 2 is meandering and relatively long, and is cooled along the way. Therefore, when the turbo fan 9 is stopped, the upper part of the deodorizing device 10 is almost closed. but,
If this introduction path is short, there is a risk that the odor gas released from the adsorbent 7 during regeneration will flow back. Therefore, in this other embodiment, a damper 12 is attached to a portion of the ventilation pipe 2 near the connection with the case body 1 in order to reliably close the upper part of the case body 1 during playback.

FIG. 4 shows an example of the mounting structure of this damper 12.

In this example, the damper 12 is automatically opened and closed by the balance between the shape memory alloy spring 13 and the spring of the spring-loaded hinge 14. That is, during deodorization, the damper 12 opens due to the elasticity of the spring of the spring-equipped hinge 14, and when the temperature rises during playback, the damper 12 closes due to the force of the shape memory alloy spring 13.

Note that the shape memory alloy spring 13 may not be used, and a damper that opens by the wind pressure of the turbo fan 9 during deodorization may be provided, or a bimetal may be used to close the damper.

Further, in the first and second embodiments described above, activated carbon was used as the adsorbent, but other adsorbents such as silica or alumina may also be used as long as they can be regenerated by heating. Further, the activated carbon used in the first and second embodiments has the ability to decompose excess ozone and a catalytic action for deodorization by itself, but a manganese-based catalyst may be added thereto. In particular, if this manganese-based catalyst is attached to the ozone generation side of the activated carbon, the above effect can be imparted even more effectively. Note that even when a manganese-based catalyst is used with an adsorbent other than activated carbon, the same actions and effects as described above can be provided.

Furthermore, in the first embodiment, a case was described in which odor gas from a toilet bowl is deodorized, but the deodorizing device of the present invention can also deodorize other odors such as a refrigerator, etc., as long as the odors can be deodorized by ventilation. It can also be applied in cases.

[Effects of the Invention] As explained above, according to the present invention, an adsorbent that adsorbs odorous substances, a gas containing an odor is forcibly sucked from the odor source side, and the gas after deodorization by the adsorbent is absorbed by the adsorbent. A fan that sends out gas from the exhaust gas port provided on the lower side of the agent, a heater that heats the adsorbent when the fan is stopped, releases the odor substances adsorbed by the adsorbent, and regenerates the adsorption function, and the heater heats the adsorbent. The ozone generator is installed above the adsorbent, where the odor-containing gas released from the adsorbent rises naturally, and generates ozone that decomposes the odor substances in the odor-containing gas. This method eliminates the need for a deodorizing catalyst, eliminates the need for fan airflow control, has a simple device configuration, and has the advantage of not leaking undecomposed odor gas or excess ozone into the room when regenerating the adsorbent. .

[Brief explanation of drawings]

FIG. 1 is a configuration cross-sectional view showing an embodiment of the deodorizing device according to the present invention, FIG. 2 is a configuration diagram showing an application example of the above-mentioned embodiment,
FIG. 3 is a sectional view showing another embodiment of the present invention;
The figure is an enlarged view of the main parts of the other embodiment described above. case body, 2: ventilation pipe, 3: exhaust port (exhaust gas port), 4 niosin generator, 7: adsorbent, 9: turbo fan, 12: damper. 8: Heater, 10: Deodorizing device,

Claims (1)

[Claims] an adsorbent that adsorbs odorous substances; a fan that forcibly sucks odor-containing gas from the odor source side and sends out the gas deodorized by the adsorbent from an exhaust gas port provided below the adsorbent; A heater that regenerates the adsorption function by heating the adsorbent when the fan stops and releasing the odorous substance adsorbed by the adsorbent; and a heater that regenerates the adsorption function by heating the adsorbent and releasing the odorous substance adsorbed by the adsorbent; and the gas containing the odor released from the adsorbent rises naturally due to the heating of the heater. and an ozone generator that is disposed above the adsorbent and generates ozone that decomposes odorous substances in the gas containing the odor.