Title of Invention | CONSTANT TEMPERATURE CONTAINER AND SANITATION MANAGEMENT/FRESH-KEEPING SYSTEM FOR THE SAME |
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Abstract | A constant temperature container (1), comprising an ozone generator (30) and a negative ion generator (40) installed in a chamber (10), wherein the negative ion generator (40) is installed, by recessing, in the ceiling (22) portion of the chamber (10) having a refrigeration unit (12) with downward blow near a door (11) apart from the refrigeration unit (12), the ozone generator (30) is installed near the air suction port (13) of the refrigeration unit (12), and the AC power of an engine unit (50) for generator for driving the refrigeration unit (12) is used as the power supply of the ozone generator (30) and the negative ion generator (40). (FIG. - 1) |
Full Text | DESCRIPTION CONSTANT TEMPERATURE CONTAINER AND SANITATION MANAGEMENT / FRESH-KEEPING SYSTEM FOR THE SAME TECHNICAL FIELD The present invention relates to constant temperature containers having a downward-blowing refrigeration cycle and more specifically to constant temperature containers having an ozone generator and an anion generator. BACKGROUND ART A constant temperature container, generally referred to as a cooling container, represses the bio-activities (respiration and the like) of perishables by keeping the temperature inside the container constant, to keep the perishables fresh for a long time. However, even if the temperature inside the container is kept constant (at a low temperature of 5°C or the like, for example), spoilage of the perishables proceeds due to fungi (molds and bacteria) that propagate at low temperature and putrid odor due to the propagation of the fungi adheres to the perishables. Furthermore, depending on the kind of the perishables, ethylene gas is generated and the freshness further deteriorates due to the ethylene gas generated by the perishables themselves. As a conventional counter-measure, the deterioration of the freshness is repressed by storing ethylene gas adsorbents in the container. However, the ethylene gas adsorbents need to be removed and replaced with fresh new adsorbents for every transport of the perishables. Furthermore, there was the problem that when failing to replace the ethylene gas adsorbents and the adsorbents are used in the subsequent transport, the bag holding the adsorbents may be ripped open and the adsorbents in the form of beads may be scattered all over the floor of the container. Recently, a perishables preserving and distributing device in which a constant temperature container is equipped with an ozone generator and an anion generator has been proposed (see Japanese Patent Application Publication Kokai No. 2002-68422) for the sanitation management of perishables and as a means for keeping them fresh. Ozone oxidizes by adsorbing to dusts, fungi, and the like that drift in the air or that adhere to the perishables and the walls and sterilizes by decomposing. However, since the ozone does not have an electric charge, even if there are metal plates in the vicinity, the ozone is not influenced by these. On the other hand, while anions spread in space by repelling each other, anions are rapidly depleted when they pass through a narrow space. Also, an effective sterilization cannot be implemented because anions are adsorbed when they come close to metal plates or the like. Therefore, it is necessary to consider these properties when installing the ozone generator and the anion generator. However, these points are not considered at all in the conventional perishables preserving and distributing device described above, and the ozone generator and the anion generator are integrated into one unit and are installed in the same place (the ceiling of the container). For this reason, it cannot be said that the properties of each device are fully utilized and there is the problem that adequate sterilization cannot be expected. The present invention has been devised to solve these problems and it is an object of the present invention to provide a constant temperature container that makes full use of the properties of the ozone generator and the anion generator by arranging them with sufficient consideration of their properties. A constant temperature container according to the present invention has an ozone generator and an anion generator in a storage space, wherein the anion generators is installed on a ceiling portion in the storage space which has a downward-blowing type refrigeration unit, the anion generator being installed at a location that is removed from the refrigeration unit and the ozone generator is installed on the ceiling portion in the storage space, the ozone generator being close to the refrigeration unit. According to the present invention having such characteristics, the anion generator is installed on the ceiling portion in a storage space having a downward-blowing refrigeration unit, at a location that is removed from the refrigeration unit. Specifically, the anion generator is installed in the space between the ceiling and the cargo, which is the maximum space when the cargo (perishables) is loaded, and in the position opposite to a suction port of the refrigeration unit. Because anions have a spatial diffusion property of spreading in space by repelling each other, the anions effectively sterilize as they are diffused throughout the space above the perishables that are loaded. On the other hand, metal plates that adsorb and extinguish the anions are used in a portion of a heat exchanger of the refrigeration unit inside the storage space. For that reason, in the present invention, the anion generator is installed at a location that is removed from the refrigeration unit. Thus, it is possible to prolong the effect of the sterilization of the anions. On the other hand, because ozone does not have an electrical charge, the ozone is not influenced by metal plates in its vicinity and acts on dust, fungi, and the like that drift in the air and fungi and the like that adhere to the walls and the perishables. Therefore, installing the ozone generator close to the refrigeration unit, it is possible to make full use of the properties of the ozone generator. As for specific installation positions, when the refrigeration unit is installed in the innermost portion, on the side opposite of the door of the storage space, then the ozone generator is installed on the ceiling portion close to the refrigeration unit and the anion generator is installed on the ceiling portion close to the door. In this case, the ozone generator should be installed close to the upper suction port of the refrigeration unit. Due to its structure, in the downward-blowing type refrigeration unit, dust and bacteria tend to accumulate more on the downstream side of the refrigeration unit, such as inside the heat exchanger or at the air blow-out port, than on the upstream side of the refrigeration unit, such as at the air suction port. Also, the moisture in the air condenses and the air is damp. For that reason, by installing the ozone generator close to the suction port of the refrigeration unit, highly concentrated ozone is immediately absorbed into the refrigeration unit from the suction port, so that the ozone can act on the bacteria propagating in the vicinity of the blow-out port on the downstream side and sterilize them. In other words, it is possible to directly apply the highly concentrated ozone to the refrigeration unit. Thus, it is possible to prevent the contamination of the cargo (the perishables) by the fungi inside the refrigeration unit. Furthermore, the anion generator is embedded in the ceiling portion of the storage space. Thus, when the door is opened and the perishables are loaded and unloaded, the anion generator does not obstruct the loading and unloading. Also, when the constant temperature container has a generator engine unit driving the refrigeration unit, an AC power source of the generator engine unit is used without change as the power source for the ozone generator and the anion generator. In the case of conventional cooling containers, both the transport vehicle and the cooling container are equipped with only a DC power source. Therefore, it is necessary to use a separate DC/AC converter to use the ozone generator and the anion generator. However, when the container has a generator engine unit that drives the refrigeration unit, it is possible to eliminate the need to additionally install such an unnecessary device. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagrammatic cross-sectional view seen from the side, showing the overall arrangement of a constant temperature container of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Below, an embodiment of the present invention is explained with reference to the drawing. FIG. 1 is a diagrammatic cross-sectional view seen from the side, showing the overall arrangement of a constant temperature container of the present invention. The constant temperature container 1 of the present embodiment is provided with a door 11 on a rear side (opposite the driver seat) in a storage space 10, for example and a cargo A of perishables or the like is loaded or unloaded therefrom. Also, a refrigeration unit 12 is installed in the innermost portion (behind the driver) in the storage space 10. Furthermore, the refrigeration unit 12 is a downward-blowing type unit in the present embodiment. That is, the refrigeration unit 12 is provided with an air suction port 13 on the upper side and an air blow-off port 14 on the lower side. Also, a cooling fan 15 is placed below and close to the suction port 13 and a heat exchanger 16 is placed below and close to the cooling fan 15. Cold air blown off from the blow-off port 14 flows from the deep end inside the storage space toward the door 11, passing between rails 21 that are arranged in multiple rows so that the cargo A that is loaded inside the storage space 10 does not touch the floor. At some points in the flow, the cold air moves upward between the cargos A that are loaded on the rails 21, and passes through a space 23 between the uppermost cargo A and the ceiling 22 inside the storage space 10 toward the deep end of the storage space. In other words, the cold air flows toward the suction port 13 of the refrigeration unit 12. In this configuration of the present embodiment, the ozone generator 30 is placed on the ceiling 22 inside the storage space 10 directly opposite to the suction port 13 of the refrigeration unit 12 and the anion generator 40 is placed on the ceiling 22 near the door 11. Thus, the ozone generated from the ozone generator 30 is immediately sucked into the refrigeration unit 12 from the suction port 13 at a high concentration and passes through the heat exchanger 16, thus acting on and sterilizing the bacteria propagating in the vicinity of the blow-off port 14 downstream. Also, anions generated from the anion generator 40 spread by diffusing through the space 23 above the loaded cargo A. After effectively sterilizing the dust and the fungi that float in that space, the anions are depleted by being sucked in through the suction port 13 of the refrigeration unit 12. It should be noted that, in FIG. 1, the anion generator 40 is attached so that it protrudes downward from the ceiling 22 of the storage space 10, but it is better that the anion generator 40 is embedded inside the ceiling 22 so that the anion generator 40 does not obstruct the opening and closing of the door 11 and the loading and unloading of the cargo A. Furthermore, in the constant temperature container 1 of the present embodiment, a generator engine unit 50 is installed as the power source for driving the refrigeration unit 12. Therefore, it is possible to use an AC power source of the generator engine unit 50 without change as the power source for the ozone generator 30 and the anion generator 40. Also, in the present embodiment, the present invention is applied to a constant temperature container having a downward-blowing refrigeration unit. But it is possible to apply the present invention to constant temperature containers having an upward-blowing refrigeration unit (in which the flow of air is entirely opposite to the downward-blowing type). In this case, it is preferable to mount the ozone generator and the anion generator on the floor of the storage space 10 in order to make maximum use of their properties, but it is also possible to mount them to the ceiling. The present invention can be embodied and practiced in other different forms without departing from the spirit and essential characteristics thereof. Therefore, the above-described embodiments are considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description. All variations and modifications falling within the range of equivalents of the appended claims are intended to be embraced therein. It should be noted that the present application is based on Patent Application No. 2002-212378 filed in Japan, the contents of which are hereby incorporated by reference. Furthermore, the entire content of the documents cited in the present specification is hereby specifically incorporated by reference. INDUSTRIAL APPLICABILITY As described above, a constant temperature container and a sanitation management / fresh-keeping system for a constant temperature container according to the present invention are suited for containers and the like that are able to keep perishables and the like fresh for a long time in ground transportation by railroad or truck, or marine transportation by ships. Furthermore, the constant temperature container and the sanitation management / fresh-keeping system for the constant temperature container according to the present invention are also suited for stationary temporary use, such as temporary storage or temporary stockpiling of perishables before and/or after shipping. WE CLAIM: 1. A constant temperature container (1) comprising an ozone generator (30) and an anion generator (40) in a storage space, wherein a downward-blowing type refrigeration unit (12) is installed at the deep end in the storage space on the side opposite to a door (11) of the constant temperature container (1); wherein the anion generator (40) is installed on a ceiling (22) portion in the storage space (10), the anion generator (40) being close to the door (11); and wherein the ozone generator (30) is installed on the ceiling (22) portion in the storage space (10), the ozone generator (30) being close to the refrigeration unit (12). 2. A sanitation management / fresh-keeping system for the constant temperature container as claimed in claim 1, wherein the ozone generator (30) is installed close to a suction port of the refrigeration unit (12). 3. A sanitation management / fresh-keeping system for the constant temperature container as claimed in claim 1, wherein the anion generator (40) is embedded in the ceiling (22) portion in the storage space (10). In a constant temperature container (1) having an ozone generator (30) and an anion generator (40) in a storage space, the anion generator (40) is installed on a ceiling (22) portion in the storage space (10) which has a downward-blowing type refrigeration unit (12), the anion generator (40) being installed at a location that is near a door (11) and is removed from the refrigeration unit (12), and the ozone generator (30) is installed close to an air suction port (13) of the refrigeration unit (12). Further, the anion generator (40) is embedded in the ceiling (22) portion of the storage space (10). Furthermore, an AC power source of a generator engine unit (50) that drives the refrigeration unit (12) is used without change as the power source for the ozone generator (30) and the anion generator (40). |
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Patent Number | 216303 | ||||||||
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Indian Patent Application Number | 00055/KOLNP/2005 | ||||||||
PG Journal Number | 11/2008 | ||||||||
Publication Date | 14-Mar-2008 | ||||||||
Grant Date | 12-Mar-2008 | ||||||||
Date of Filing | 19-Jan-2005 | ||||||||
Name of Patentee | YANMAR CO., LTD. | ||||||||
Applicant Address | 1-32, CHAYAMACHI KITA-KU, OSAKA-SHI, OSAKA 530-0013,JAPAN, | ||||||||
Inventors:
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PCT International Classification Number | B01J 23/63 | ||||||||
PCT International Application Number | PCT/JP03/09291 | ||||||||
PCT International Filing date | 2003-07-22 | ||||||||
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