JPH05284905A - Freshness preservative equipment - Google Patents

Abstract

PURPOSE:To provide the subject equipment so designed that the space between an ozone treatment device and a ventilating means at the downstream part of this device is enclosed with a easing to ensure all the air on the upstream side to be allowed to flow through the device. CONSTITUTION:The upstream side of a closed chamber-type unit body provided with an air inlet on the upstream side and an air outlet on the downstream side is equipped with an ozone generating means and the down stream side with an ozone treatment means to decompose ethylene, etc., and the air in e.g. a storehouse for fruits and vegetables is taken by a ventilating means via the inlet and the ethylene, etc., in this air is put to ozone treatment and the residual ozone is removed and the resultant air is returned via the outlet to the storehouse. In this freshness preservative equipment, the unit body is divided, through the ozone treatment means, into an upstream chamber and a downstream one, and a casing enclosing the space between the ventilating means and the ozone treatment means is also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preserving device for removing ethylene discharged from fruits and vegetables.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional preserving device.

The fresh-keeping device is for removing ethylene, which has a aging and aging-promoting action from the fruits and vegetables stored in the storage, by ozone to maintain the freshness of the fruits and vegetables.

That is, the air containing ethylene in the storage 20 (the space outside the unit body 1) is flown into the unit body 1 through the inlet 8 by the fan 5, and the wavelength of mainly 184. Irradiation with ultraviolet rays of 9 nm produces ozone from oxygen in the air. This ozone oxidizes ethylene and converts it to ethylene oxide and the like, and also kills bacteria and the like.

Next, the air flows into the ozone treatment device 7 made of activated carbon or a catalyst, and excess ozone is decomposed into oxygen and the like. The air from which ozone has been removed is returned to the storage 20 through the outlet 9.

Thus, the ethylene in the storage 20 is removed to maintain the freshness.

[0007]

SUMMARY OF THE INVENTION In the above-mentioned conventional preserving apparatus, excess ozone is decomposed by the ozone processor 7 and the ozone-removed air is returned to the storage 20 to damage the human body due to ozone toxicity. Is being prevented.

By the way, since the fan 5 for flowing the air in the storage 20 into the unit body 1 is attached to the outlet 9, the inside of the unit body 1 is in a negative pressure state.

Therefore, if the seal between the ozone processor 7 and the inner surface of the unit main body 1 is poor, a part of the air containing ozone will bypass the ozone processor 7 and be returned to the storage 20. There was a problem that the human body was exposed to the toxicity of ozone.

In order to solve the above problems, the present invention encloses a casing between a ventilation means provided downstream of the ozone treating device and the ozone treating device so that the upstream air passes through the ozone treating device without exhaustion. The purpose of the present invention is to provide a freshness preservation device.

[0011]

As a means for solving the above problems, the present invention provides an ozone generating means on the upstream side in a closed-chamber unit body having an air inlet on the upstream side and an outlet on the downstream side, and an ozone generating means on the downstream side. Is equipped with ozone treatment means for decomposing ozone,
In a preserving device that takes in air from a storage for fruits and vegetables, etc. from the inlet by ventilation means, treats ethylene in the air with ozone, removes the remaining ozone, and returns to the storage, etc. from the outlet,
The inside of the unit main body is divided into an upstream chamber and a downstream chamber by the ozone treatment means, and a casing surrounding the ventilation means provided on the downstream side and the ozone treatment means is provided. It is intended to provide a device.

[0012]

The present invention, having the above-mentioned structure, has the following operation.

That is, the upstream chamber of the unit body, in which the ozone generating means is installed, is placed in a negative pressure state because it is on the suction side of the ventilation means, and the downstream chamber is in a positive pressure state because it is on the outlet side of the ventilation means. Get burned. On the other hand, since the casing between the ventilation means and the ozone treatment means provided on the downstream side of the ozone treatment means is enclosed, even if the seal between the ozone treatment means and the inner surface of the unit main body is bad, the ozone is not discharged. The air in the upstream chamber containing the air does not flow out to the downstream chamber by bypassing the ozone processing means, and all the air passes through the ozone processing means.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The same components as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted unless necessary. FIG. 1 is a vertical cross-sectional view of the freshness preservation device of this embodiment.

An ozone treatment device 7 is installed in the unit body 1 and is divided into an upstream chamber 1a and a downstream chamber 1b. The ozone processor 7 is made of manganese, iron, cobalt,
A metal catalyst such as palladium or a metal oxide catalyst thereof,
Alternatively, activated carbon or the like is used as a material, and ozone is decomposed into oxygen or the like by the action of this catalyst or the like.

An ultraviolet lamp 6 is installed in the upstream chamber 1a. UV lamp 6 mainly has a wavelength of 184.9 nm
The oxygen in the air is converted to ozone by irradiating the ultraviolet rays.

A fan 5 is installed on the downstream side of the ozone treatment device 7 to allow the air in the storage 20 to flow from the inlet 8 to the outlet 9 of the unit body 1. Between the fan 5 and the ozone treatment device 7. It is surrounded by the casing 10.

When the fan 5 is activated, the storage 2
Ozone-containing air in 0 flows into the upstream chamber 1a through the inlet 8 and is irradiated to the ultraviolet lamp 6 to generate ozone. This ozone is oxidized by converting ethylene into ethylene oxide or the like. Excess ozone enters the ozone processor 7 together with air, and in the process of passing through this ozone is decomposed by a catalyst or the like. The air from which ozone has been removed is urged by the fan 5 and flows out from the outlet 9 into the storage 20 through the downstream chamber 1b.

By the way, the upstream chamber 1a in which the ultraviolet lamp 6 is installed is placed in a negative pressure state because it hits the suction side of the fan 5, and the downstream chamber 1b is placed in a positive pressure state because it hits the outlet side of the fan 5.

Therefore, even if the seal between the ozone processor 7 and the inner surface of the unit main body 1 is poor, the air containing ozone in the upstream chamber 1a bypasses the ozone processor 7 to the downstream chamber 1b. It will not be leaked.

Therefore, the entire amount of the air in the upstream chamber 1a flows into the ozone treatment device 7, where excess ozone is decomposed and the ozone-removed air is returned to the storage 20.

As described above, according to this embodiment, the inside of the unit body 1 is treated by the ozone treatment device 7 by the upstream chamber 1a and the downstream chamber 1a.
Since the fan 5 is installed on the downstream side of the ozonizer 7 and the space between the ozonizer 7 and the fan 5 is surrounded by the casing 10, the air in the upstream chamber 1a is separated from the ozonizer 7 by b. Other than passing through, it cannot exit to the downstream chamber 1b, and there is no air that exits through the gap between the inner circumference of the unit body 1 and the ozonizer 7 as in the prior art, so air containing ozone is stored in the storage 20. There is an advantage that the problem of being returned to is eliminated.

Although the above embodiment has been described with reference to the case where the fruits and vegetables are stored, the object of use is not limited to the fruits and vegetables storage.

[0024]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, even if the seal between the ozone treatment means and the inner surface of the unit body is poor, the air in the upstream chamber containing ozone bypasses the ozone treatment means and flows out to the downstream chamber. Since the entire amount is processed by the ozone processing means, the air from which ozone has been removed can be returned to the inside of the storage or the like, and damage to the human body due to ozone toxicity can be prevented.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a preserving device for removing ethylene according to an embodiment of the present invention,

FIG. 2 is a vertical cross-sectional view showing a conventional preserving device.

[Explanation of symbols]

 1 Unit Main Body 1a Upstream Chamber 1b Downstream Chamber 5 Fan 6 Ultraviolet Lamp 7 Ozonator 8 Inlet 9 Outlet 10 Casing

Continued Front Page (72) Inventor Kyosuke Sasaki 3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Air-Conditioning Factory (72) Naokazu Takeuchi Iwazuka-cho, Nakamura-ku, Nagoya 1 Address Mitsubishi Heavy Industries, Ltd. Nagoya Research Institute (72) Inventor Takuya Kitada 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya City Mitsubishi Heavy Industries Ltd. Nagoya Research Institute (72) Inventor Ryoji Mizuno 9 Iwazuka-cho, Nakamura-ku, Aichi Prefecture Nagoya No. 60, 1 in Nakabishi Engineering Co., Ltd.

Claims (1)

[Claims] 1. An ozone generating means is provided on the upstream side in a closed chamber unit main body having an air inlet on the upstream side and an outlet on the downstream side, and an ozone treatment means for decomposing ozone is provided on the downstream side, and the ventilation means is provided. In a preserving device that takes in air from a store of fruits and vegetables from the inlet, treats ethylene in the air with ozone, removes the remaining ozone, and recirculates it from the outlet to the store, etc. A preserving device, characterized in that it comprises a casing which is partitioned into the above and which surrounds the ventilation means provided on the downstream side thereof and the ozone treatment means.