JP3240838B2 - Ozone deodorizing and sterilizing equipment for vehicle containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone deodorizing and sterilizing apparatus for a vehicle container, which has a greatly improved deodorizing and sterilizing ability.

[0002]

2. Description of the Related Art It is well known that ozone has a deodorizing effect of decomposing and removing odor components in the air and a disinfecting effect of disinfecting various bacteria. Using this, conventionally,
In-vehicle ozone deodorizing devices have been proposed or commercialized in various forms. Particularly, in the case of vehicle containers, for example, FIG.
There is something like that shown in

[0003] The illustrated ozone deodorizing apparatus a is installed at an arbitrary place in a container room, and inhales room air by rotation of a fan motor c into a casing b which defines the ozone deodorizing apparatus, and generates ozone generated by an ozone generator d. After that, the ozone component is decomposed by the ozone decomposition catalyst e, and is blown into the room through the ozone component. In particular, since ozone is harmful to the human body when its concentration is high, ozone is decomposed by such a catalyst. In addition, various bacteria in the air are sterilized simultaneously with the deodorization.

[0004] Similar devices have become widespread when viewed as a whole for use in vehicles, that is, the entire device is unitized and installed at an arbitrary place in a vehicle cabin. After inhaling indoor air and deodorizing, ozone is decomposed with a catalyst and blown into the room.

As described above, the whole apparatus is unitized to provide versatility, that is, the installation location and the like can be freely selected, and the whole apparatus can be made compact.

[0006]

However, such a deodorizing or sterilizing apparatus shares the following disadvantages.

Since the odor components are not deodorized unless they are sucked into the apparatus, it is difficult to remove the odor components attached to, for example, a seat surface in a vehicle interior, a wall surface or a complicated place in a container interior. In particular, in the case of a refrigerator or a frozen container room, since a baggage that emits a relatively strong smell such as fresh fish or meat is loaded, a problem occurs that the room always has a bad smell due to the smell attached to the wall surface. In addition, it is not preferable in terms of hygiene, that is, it is difficult to sterilize indoor germs.

[0008] The suction capacity of the fan motor greatly affects the deodorizing ability. However, if the entire apparatus is to be made compact, the capacity of the fan motor is naturally limited, and it takes time to deodorize. Conversely, if the capacity of the fan motor is increased to perform deodorization in a short time, the flow rate increases,
It is necessary to increase the capacity of the ozone generator and the amount of the catalyst, and furthermore, it is necessary to increase the reaction space in order to increase the reaction time (residence time) between the intake air and ozone, resulting in an increase in the size of the entire apparatus. .

When the catalyst is deteriorated, harmful ozone is discharged into the room, and maintenance of the catalyst is required, which is troublesome.

[0010] Since the steady operation is performed, a flexible response to the odor intensity cannot be taken. In other words, strong odors take a long time to deodorize, and weak odors may operate more than necessary.

The present invention has been made in view of the above circumstances, and an object of the present invention is to dispose odor components adhering to the walls and the like of a vehicle container by disassembling and removing the odor components and sterilizing the room. Another object of the present invention is to provide an ozone deodorizing / sterilizing apparatus for a vehicle container which can greatly enhance the deodorizing / sterilizing ability.

[0012]

According to the present invention, there is provided an ozone deodorizing / sterilizing apparatus installed in a vehicle container, wherein a casing, a passage formed in the casing, and through which room air passes. A housing portion for devices formed in the casing partitioned from the passage, an ozone generator housed in the housing portion to supply ozone into the passage, and provided facing the passage and passing therethrough. An ozone sensor for detecting an ozone concentration on a relatively low concentration side of the room air, an ultraviolet lamp provided in the passage for decomposing ozone of the room air passing therethrough, and continuously turning on the ultraviolet lamp A control circuit for controlling the ozone generator based on a predetermined control mode, wherein the control mode is adapted to maintain the ozone concentration in the room at a low level. A first mode in which the ozone generator is controlled to be turned on and off in response to a sensor detection signal, and the ozone generator is turned on for a first predetermined time in order to increase the ozone concentration in the room, and then the ozone generator is turned on. A second mode in which the ozone generator is turned off for a second predetermined time in order to reduce the concentration, and thereafter the mode shifts to the first mode, wherein the control circuit performs the first mode and the second mode Is configured to be switchable.

[0013]

[Function] The room air passing through the passage in the casing includes:
The supply of ozone by the ozone generator and the detection of the ozone concentration by the ozone sensor are performed. Then, the indoor air in the passage to which the ozone is supplied is discharged into the room and circulated in the room to decompose odor components attached to the wall surface and the like, and at the same time, sterilize the room.

Further, the above-mentioned apparatus is provided with a control circuit for continuously turning on the ultraviolet lamp and controlling the ozone generator. The control circuit performs control based on the first mode or the second mode. That is, in the first mode, the ozone generator is turned on / off in accordance with the detection signal of the ozone sensor to control the ozone concentration in the room. Keep at low concentration. In this case, the container room can enter and work can be performed. In the second mode, the ozone generator is first turned on for a first predetermined time to increase the concentration of ozone in the room, and deodorization is performed in a short time when the smell is strong. Next, the ozone generator is turned off for a second predetermined time to reduce the ozone concentration. At this time, the ozone in the indoor air is decomposed by the irradiation of the ultraviolet light from the ultraviolet lamp, so that the ozone concentration becomes low.
After a second predetermined time, the mode shifts to the first mode, and the indoor ozone concentration is kept low by the above-mentioned on / off control.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a plan view and a side sectional view showing an ozone deodorizing / sterilizing apparatus according to the present invention, and FIGS. 2 and 3 are views showing an installation place thereof. In particular, FIG. Is shown.

As shown in FIG. 1, an ozone deodorizing and sterilizing apparatus 1
Is formed by a box-shaped or dish-shaped casing 2 which extends in the longitudinal direction and has an open upper surface. The casing 2 is formed of a panel made of aluminum or SUS having a thickness of 1 mm, and has a partition plate 3 extending in the longitudinal direction that partitions the inside at a substantially central position in the width direction, and one of the partitioned spaces is room air. The other is a storage section 5 for storing equipment. Naturally, both ends of the passage 4 are opened so that an inlet 6 and an outlet 7 are formed (see FIGS. 5 and 6). A flange portion 8 is formed on the peripheral edge of the upper end of the casing 2, and the device 1 is screwed to the inner wall of the container room using a plurality of screw holes 9 provided at predetermined intervals along the flange portion 8.

As shown in FIGS. 2 and 3, in this embodiment, the container is a refrigerated or frozen container, so that indoor air is sucked into the front end of the ceiling wall 11 of the container room 10.
A condenser (evaporator) 12 that is cooled and blown into the room is installed. That is, the condenser 12 sucks the room air from the lower surface, cools it with the internal heat exchanger, and then blows out the cooling air from the outlet located on the rear side to cool the container room 10 to the refrigeration or freezing temperature. To keep. With the inlet 6 facing the outlet of the condenser 12, the device 1 is mounted adjacent to the rear of the condenser 12, and the longitudinal direction of the device 1 is aligned with the front-rear direction, and It is attached to 10 ceiling walls 11. The room air blown from the condenser 12 is smoothly passed through the passage 4. Furthermore, the height dimension of the apparatus 1, that is, the casing 2, is made almost as thin as that of the condenser 12 (about 100 mm), so that the load capacity is not reduced and work is not hindered. After the mounting, the upper open surface of the casing 2 is closed by the ceiling wall 11, and the passage 4 and the housing 5 are completely independent spaces.

Returning to FIG. 1, an ozone generator 13 for supplying ozone into the passage 4 and an ozone sensor 14 for detecting the ozone concentration of the room air passing through the passage 4 are provided in the housing 5.
And a pump 15 for supplying room air to the ozone generator 13
And a ballast 17 for stabilizing the discharge of the ultraviolet lamp 22 provided in the passage 4 and a circuit board 18 for electrically connecting them.

The so-called silent discharge type is used as the ozone generator 13, which applies a high-frequency high voltage to the electrodes on both surfaces of the ceramic substrate to generate a glow discharge on the surface of the ceramic substrate around the electrodes, thereby producing a glow discharge in the air. It converts oxygen into ozone. Thereby, a relatively large amount of ozone can be generated, and the deodorizing and sterilizing ability can be enhanced.

The pump 15 takes in the room air from the pipe 19 and supplies it to the ozone generator 13 through the pipe 20.
The supplied air is supplied or mixed with ozone by the ozone generator 13 and supplied to the uppermost stream portion of the passage 4 through the branch pipe 21. The ozone sensor 14 is attached to the partition plate 3 with its detection part 14a facing the downstream part in the passage 4, and at that position, the indoor air has a particularly low concentration side (0 to 1.0 pp).
m) Ozone concentration is detected. Reference numeral 5a denotes an ozone vent hole.

The passage 4 is provided with an ultraviolet lamp 22 for decomposing ozone in room air passing therethrough.
The ultraviolet lamp 22 mainly emits ultraviolet light having a wavelength of 254 nm, and decomposes ozone (O ₃ ) into oxygen molecules (O ₂ ) and active oxygen (O). Further, the ultraviolet lamp 22 has insulator portions 23 at both ends thereof, and the insulator portions 23 are supported by a support 24.

FIG. 4 shows the details, in which the support 24 has a divided structure consisting of lower and upper supports 25 and 26. The lower support 25 is fixed to the side wall of the casing 2 and the partition plate 3 by bending both end portions 25 a across the passage 4, and the upper support 26 is screwed by the thumb screw 27 so as to sandwich the insulator 23 of the ultraviolet lamp 22. Be stopped. These supports 2
A semicircular groove 28 for fitting the insulator 23 is formed in each of the flanges 5 and 26, and a flange 29 for restricting the axial movement of the ultraviolet lamp 22 is formed at one end of the semicircular groove 28. Thumbscrew 2
7 is inserted from below, and the ultraviolet lamp 2
2 can be easily replaced. UV light 2
A lead wire 30 having a connector at the distal end thereof emerges from the insulator portion 23. The lead wire 30 is taken into the receiving portion 5 from the hole of the partition plate 3 and is connected to the lead wire of the ballast 17 by a connector. You.

FIG. 5 is a view of the apparatus 1 as viewed from the entrance 6 side.
As shown, the entrance 6 of the passage 4 is open. Further, wiring insertion holes 31a and 31b for a control circuit, which will be described in detail later, are provided on a side wall on the entrance side of the casing 2. Hole 3
1a is used as a signal and power transmitting side, and the hole 31b is used as a receiving side.

FIG. 6 shows the outlet side, in which the outlet 7 is similarly opened. On the outlet side, a cover 32 for slidingly closing the outlet 7 is provided. FIG. 7 is a plan sectional view of the outlet side as viewed from above. Referring also to FIG. 7, an inner flange portion 33 is formed at an upper end edge and a lower end edge of the outlet portion 7, and an outlet side wall of the casing 2. Is provided with an outer flange portion 34 having an L-shaped cross section and a generally U-shape, and the cover 32 slides along upper and lower grooves 35 formed thereby. On the surface of the cover 32, a knob 36 and a base end of a stopper fitting 37 for elastically pressing the side wall of the casing 2 are fixed.

Referring again to FIG. 2, a control unit 38 including the above-described control circuit is installed in a console box or the like in the vehicle compartment. Since the device 1 is operated at 100 V AC, the battery mounted on the truck is supplied with 24 V DC.
An inverter 39 for converting to 100V is also provided. The appearance of the control unit 38 is as shown in FIG. 8, and the specific operation thereof will be described later together with the description of the control circuit.

FIG. 9 shows an electric circuit diagram of the device 1 according to the present invention.
A portion surrounded by a dotted line in the drawing is the control circuit 40 included in the control unit 38. Generally, the control circuit 40 continuously turns on the ultraviolet lamp 22 and also controls the ozone generator 1.
3 is controlled based on a predetermined control mode, that is, a first mode and a second mode.

In the figure, SW1 is a main switch, S
W2 is a lamp switch for the ultraviolet lamp 22, SW3 is an ozone switch for the ozone generator 13, SW4 is a mode switch for switching the control mode, and T1 and T2 are timer relays. Actual manual switches corresponding to these switches SW1 to SW4 are:
The time setting dials D1 and D2 for the timer relays T1 and T2 are also shown in the control unit 38 shown in FIG. The control unit 38
A terminal plate is provided on the back surface of the indoor unit 1.
And wiring from the inverter 39 and the like.

First, the first mode will be described with reference to FIG. 9. At this time, the switches SW1 to SW3 are on, and the switch SW4 is switched to the A side. The 24 V DC sent from the alternator turns on the relay RY 1, whereby the inverter 39 receives the 24 V DC from the battery 41 and outputs 100 V AC. Then, the current is branched at a point a, one of which flows to the ultraviolet lamp 22 through the switch SW2 to turn it on. The other one reaches the sensor relay 42 through the switch SW3 and the A side of the switch SW4 and the protection switch 41 (always on) in order. The ozone sensor 14 is connected to the sensor relay 42. In particular, in this embodiment, the sensor relay 42 is turned on when the detected concentration of the ozone sensor 14 is lower than 0.08 ppm, and is turned off when the detected concentration exceeds 0.08 ppm. When the sensor relay 42 is turned on, power is supplied to the ozone generator 13 and the ozone generator 13 is turned on.

Thus, in the case of the first mode, 0.08 ppm
ON / OFF control of the ozone generator 13 is performed at the boundary of the ozone concentration.

Next, the second mode will be described. At this time, the switch SW4 is switched to the B side, while the ultraviolet lamp 22 is on as described above. FIG. 10 shows the elapse of time in the second mode, and it will be easier to understand the control contents if they are referred to together. Now, the current passing through the switch SW3 flows on the B side of the switch SW4, branches at the point b, and turns on the relay RY2. This closes the relay switch RS2 and the current from point c flows through it, causing the timer relay T1 and its switch TS1
Leads to.

Here, the timer relay T1 closes the switch TS1 to the contact NO side for a first predetermined time, that is, time t1, from the time when the current is applied. Therefore, the switch TS1
Reaches the ozone generator 13 directly therefrom and turns it on. At this time, the on / off control by the ozone sensor 14 is not performed, and the ozone generator 13 performs a continuous operation.

When the time t1 has elapsed, the timer relay T1 closes the switch TS1 to the contact NC side, whereby the timer relay T2 is turned on. However, the timer relay T2 is set to the second predetermined time, that is, the time t2.
, The switch TS2 is opened and the ozone generator 1
The power supply to 3 is cut off and turned off. Time t2
Has elapsed, the timer relay T2 closes the switch TS2 to the contact NO side, whereby the sensor relay 42 becomes conductive, and the ozone generator 13
Is performed, that is, the transition to the first mode is performed.

As described above, in the second mode, the continuous operation of the ozone generator 13 is performed during the time t1, the indoor ozone concentration is increased to, for example, about 9 ppm, and the time o
For 2 hours, it is turned off and the indoor ozone concentration is made low by the ozonolysis of the ultraviolet lamp 22, and then the process shifts to the first mode to perform sensor control for maintaining the indoor ozone concentration at a low concentration.

When the switch SW4 is switched to the A side in order to switch to the first mode during the operation of the second mode, a current instantaneously flows through the timer relay T1, and at the same time, the reset side thereof is turned on, and the timer relay T1 is turned on. Reset.

The ozone deodorizing and sterilizing apparatus 1 having the above configuration has various advantages as described below. First, the ozone mixed in the room air in the passage 4 is circulated or diffused so as to reach the whole of the container room 10, so that the odor component attached to the room wall and the like is decomposed, and at the same time, the whole room is sterilized. Can be performed. In particular, when the smell is strong, the deodorization can be instantaneously performed by operating in the second mode, and the deterioration of the smell can normally be prevented by performing the low concentration control in the first mode (ozone masking can be performed). . As described above, the optimum operation according to the intensity of the odor can be performed, and the deodorizing or sterilizing ability can be greatly improved.

Here, in particular, at present, there is no ozone sensor 14 capable of measuring from a low concentration to a high concentration. For this reason, timer control is performed on the high concentration side, and ON / OFF control by the ozone sensor 14 is performed on the low concentration side. Is what you do. Therefore, the set time of the timer relays T1 and T2 is equal to the time t1
Between the room ozone concentration of about 9ppm high, time t
The time is set or adjusted by the time setting dials D1 and D2 so that a low concentration of about 0.1 ppm or less is obtained between the two. When the concentration is high, entry into the container room is not allowed. However, when the concentration is low, it is safe to enter below 0.1 ppm and entry work is possible.

The ultraviolet lamp 22 decomposes ozone into oxygen molecules and active oxygen. The active oxygen generated here is more reactive than ozone, and is diffused into the room 10 to further improve the deodorizing and sterilizing ability. it can. Note that the decomposition capability of the ultraviolet lamp 22 is naturally lower than the generation capability of the ozone generator 13, and therefore does not hinder ozone emission.

Further, since a long-life ultraviolet lamp 22 is used without using a catalyst for the ozonolysis, the maintenance period becomes longer and easier. Further, the replacement of the ultraviolet lamp 22 is easy as described above.

In addition, when the container room 10 is cleaned, water is sowed into the room (high-pressure car washing or the like). In this case, if the cover 32 is closed, water is immersed in the passage 4 and water is leaked into the ozone sensor detecting section 14a. , And the ingress of water into the storage section 5 from around the detection section 14a can be prevented. Therefore, the provision of the cover 32 makes it possible to provide a waterproof structure. Here, the sowing during cleaning is often performed from outside by opening the door at the rear of the container, and thus the cover 32 is provided only on the rear side.

Further, since the ultraviolet lamp 22 is firmly supported at both ends by the support 24, it is possible to completely prevent the ultraviolet lamp 22 from coming off due to vibration during driving of the vehicle. Here, since the support 24, particularly the lower support 25, has an elongated plate shape, it has a certain degree of vibration absorption. Further, a cushion material may be added to improve vibration absorption.

Since the casing 2 is made of aluminum or SUS panels, the casing 2 is lightweight and tough, and furthermore, completely surrounds the electrical equipment, so that an electromagnetic shielding effect can be produced. Especially the casing 2 panel thickness is 1m
The value of m is based on the malfunction of the ozone sensor 14 due to an external electromagnetic wave under a steel tower or the like, and the result of a test for confirming the degree of influence of electromagnetic waves generated by the ozone generator 13 on a vehicle control system or a radio or other electrical component. Therefore, malfunction of the device 1 and
Malfunction of the vehicle control system or noise to the radio or the like is completely eliminated.

Since the control unit 38 is provided separately in the vehicle cabin, the manual operation of the apparatus 1 can be easily performed.

As another advantage, since the air blown out of the condenser 12 is used, a blowing means such as a fan motor can be omitted, whereby the size of the apparatus 1 can be further reduced. This is a special effect installed in the container room,
Of course, it is impossible and not preferable to install it near the air conditioner outlet in the passenger compartment. Therefore, by this compacting, for example, the height dimension of the device 1 or the casing 2 is reduced to 10
It can be as thin as 0 mm.

Regarding the ozone deodorizing and sterilizing apparatus described above,
When a deodorization test was performed in an actual container room, the following favorable results were obtained. The container used for the test had a loading capacity of 14.2 m ³ , and the tests were roughly divided into two types: when a fresh fish was loaded on the container and when the fresh fish was dropped. When fresh fish are loaded, the indoor odor is relatively weak, and the indoor concentration of trimethylamine (hereinafter abbreviated as TMA), which is the main component of the odor, is about several ppb.
In this case, deodorization could be instantaneously performed by the operation in the first mode. Here, deodorization means that in the presence of ozone, that is, in an ozone masking state, the odor intensity according to a six-stage odor intensity display method, which is one display method of the sensory test method, becomes 1 or less.

When the fresh fish is unloaded, the indoor smell is strong.
The MA concentration reaches several tens of ppb to several hundred ppb. In this case, when the TMA concentration was less than 100 ppb, the deodorization could be instantaneously performed by the operation in the first mode, or the deodorization could be completely performed within 30 minutes by the operation in the second mode.
Here, the complete deodorization means that the odor intensity becomes 1 or less under the condition that ozone does not exist.
Further, in the case of an abnormal odor at which the TMA concentration was 100 ppb or more, the odor could be deodorized within 30 minutes by the operation in the second mode.

As described above, such an ozone deodorizing / sterilizing apparatus has various excellent functions, and can be installed in a place other than a vehicle container room. For example, it can be installed in a food processing plant, a food warehouse, or the like. .

[0048]

The present invention exhibits the following excellent effects.

(1) The deodorizing and sterilizing ability can be greatly improved.

(2) Optimum operation according to the odor intensity can be performed.

[Brief description of the drawings]

FIG. 1 is a plan view and a side sectional view showing an embodiment of an ozone deodorizing and sterilizing apparatus according to the present invention.

FIG. 2 is a schematic side view showing an installation state of the apparatus.

FIG. 3 is a schematic perspective view showing an installation state of the apparatus, particularly showing a state where the container room is viewed from the rear.

FIG. 4 is an enlarged perspective view showing an ultraviolet lamp and a support.

FIG. 5 is a side view when the device is viewed from the indoor air inlet side.

FIG. 6 is a side view when the device is viewed from the indoor air outlet side.

FIG. 7 is an enlarged plan sectional view on the indoor air outlet side of the device.

FIG. 8 is a perspective view showing a control unit.

FIG. 9 is an electric circuit diagram of the device.

FIG. 10 is a diagram showing a temporal operation in a second mode.

FIG. 11 is a side sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ozone deodorizing and sterilizing apparatus 2 Casing 4 Passage 5 Housing part 6 Inlet part 7 Outlet part 10 Container room 13 Ozone generator 14 Ozone sensor 22 Ultraviolet lamp 24 Supporting device 32 Cover 40 Control circuit

Continuation of the front page (72) Inventor Keiji Furumachi 8 Tsuchiya, Fujisawa-shi, Kanagawa Prefecture Isuzu Central Research Laboratory Co., Ltd. (56) References JP-A-2-40475 (JP, A) JP-A-64-70681 (JP) JP-A-1-302090 (JP, A) JP-A-2-28715 (JP, A) JP-A-63-125764 (JP, U) JP-A-1-63984 (JP, U) 2-53743 (JP, U) JP 5-34008 (JP, U) JP 5-37245 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60H 3/00 A61L 9/015 A61L 9/20

Claims (3)

(57) [Claims] 1. An ozone deodorizing / sterilizing apparatus installed in a vehicle container, wherein a casing, a passage defined in the casing and through which room air passes, and a passage formed in the casing and partitioned from the passage. An accommodating section for equipment, an ozone generator accommodated in the accommodating section and supplying ozone into the passage, and an ozone concentration on a relatively low concentration side of the room air provided facing the passage and passing therethrough. An ozone sensor for detecting, and an ultraviolet lamp provided in the passage and decomposing ozone in the room air passing therethrough,
A control circuit for continuously turning on the ultraviolet lamp and controlling the ozone generator based on a predetermined control mode, wherein the control mode controls the ozone sensor so as to maintain the ozone concentration in the room at a low concentration. A first mode in which the ozone generator is controlled to be turned on / off in response to the detection signal, and the ozone generator is turned on for a first predetermined time so as to increase the ozone concentration in the room, and then the ozone concentration is turned on. A second mode in which the ozone generator is turned off for a second predetermined time in order to reduce the concentration of the ozone, and then the mode shifts to the first mode. An ozone deodorizing and sterilizing apparatus for a vehicle container, wherein the apparatus is configured to be switchable. 2. The ozone deodorizing and sterilizing apparatus for a vehicle container according to claim 1, wherein said casing has a pair of supportable components for supporting both ends of said ultraviolet lamp. 3. The ozone deodorizing / sterilizing apparatus for a vehicle container according to claim 1, wherein a cover is provided at at least one of the entrance and the exit of the passage so as to openably close the passage.