JP3161809U - refrigerator - Google Patents

Abstract

A non-electric refrigerator that is lightweight, inexpensive, and cools in a short time is provided. A storage chamber is constituted by a bag or a container filled with a liquid. Cover the upper part of the storage chamber with a multilayer polyethylene film. From the filled liquid, infrared rays are radiated through a bag or a container, and are emitted toward the sky through a multilayer polyethylene film. The liquid cooled by emitting infrared rays behaves as a cooling agent, and maintains the temperature in the storage chamber at a low temperature. [Selection] Figure 1

Description

  The present invention relates to a refrigerator.

  2. Description of the Related Art So-called heat pump refrigerators that release heat in a cabinet to the outside by compressing and expanding refrigerant such as Freon gas by an electric motor or a compressor driven by an engine have been widely used. So-called air cycle heat pumps using air as a refrigerant are also used for special purposes. A so-called thermoelectric cooler that applies a voltage to the thermoelectric element and cools it using the Peltier effect has been put into practical use within a limited range. So-called absorption refrigerators that use heat absorption and heat dissipation during the absorption and separation of two types of liquids have also been widely used. The so-called gas absorption type, which is obtained by burning a gas, is generally used as the thermal energy necessary for separating two types of liquid in an absorption refrigerator. The principle of these refrigerators is exactly the same as that of air conditioners, and the temperature inside the refrigerator is transferred by using heat, such as electricity, gas, and oil, from the inside of the low temperature side to the outside of the high temperature side. Is to lower.

  On the other hand, as a refrigerator that keeps the inside of the cabinet at a low temperature without using energy such as electricity, gas, oil, solar heat, etc. Refrigerators and so-called muro, which are formed in the basement by utilizing the property of soil that has high heat insulation for high specific heat, have been used since ancient times, but today they are replaced by heat pump refrigerators that use electricity. As a result, there are fewer examples of usage.

  In this way, conventional refrigerators only have cold storage refrigerators or muro other than those that use expensive energy such as electricity, gas, and oil, but cold storage refrigerators obtain ice storage agents such as ice. It is extremely inconvenient to replenish. In addition, additional energy is required to cool the regenerator. Muro is uncommon because of the geographical conditions and land restrictions that can be formed.

  On the other hand, a non-electric refrigerator applying the principle of radiation cooling was made by the same inventors as the present invention (cited Patent Document 1). The non-electric refrigerator according to the present invention will be described with reference to FIG. 2. A plurality of transparent plates 10 arranged substantially in parallel with each other, a partition plate 11 sandwiched between the transparent plates, and the transparent plates. The opaque plate 12 arranged in parallel, the opaque plate constitutes a part of the upper part and the side part, and has one or a plurality of doors 13 on another surface, and is formed so as to be blocked or opened from the outside by the doors. A watertight casing 15 having one or a plurality of storage chambers 14, a liquid 16 filled in a part or all of a sealed space formed by the casing, the opaque plate and the storage chamber, It consists of a heat insulating material or heat insulating space 17 provided on all or part of the outer periphery of the housing and the door. According to the present invention, a non-electric refrigerator that does not use artificial energy such as electricity, gas, and oil and a cold storage agent such as ice has been realized.

  However, the non-electric refrigerator according to the present invention has the disadvantage that it is expensive and heavy and requires a long time for cooling. That is, a stainless steel plate welded structure is a practical option for a watertight casing, but as is well known, a stainless steel watertight welded structure requires advanced technology and is heavy and expensive. In addition, a plurality of transparent plates arranged in parallel and spaced apart from each other is a far-infrared transmitting thin glass plate, but unlike a general soda glass, a far-infrared transmitting thin glass plate is not readily available. Not very expensive. The heat from the storage is first transferred to the metal forming the storage chamber, then transferred to the water surrounding the storage chamber, transferred to the upper water by natural convection of water, then transferred to the radiation plate in contact with the water, and finally From the outer surface of the radiation plate, the light passes through the transparent plate and is emitted in the form of infrared rays into the sky. Thus, since heat transfer is performed through natural convection of water, cooling takes a long time.

JP 2003-185314 A

The present invention has been made in view of the above circumstances, and a problem to be solved is to realize a non-electric refrigerator that is light and inexpensive and cools in a short time.

  In the present invention, the entire refrigerator or a part of the refrigerator is installed in a place where it is not directly exposed to the sun but can look up at the night sky, that is, on the north surface outside or on the north surface veranda. The inside of the storage chamber side and bottom of the refrigerator of the present invention is composed of a bag or container filled with liquid. An upper lid made of a multilayer polyethylene film and a frame is covered on the upper side of the refrigerator compartment. The upper lid is closed at night and exposed to the night sky.

Infrared rays are emitted from the liquid filled in the bag or container through the bag or container. According to Stefan-Boltzmann's law, the amount of infrared radiation is proportional to the fourth power of absolute temperature and proportional to the first power of emissivity. Part of the emitted infrared radiation passes through the multilayer polyethylene film and is emitted into the sky. The emitted infrared rays are so-called far infrared rays having a wavelength of about 10 microns according to Vienna's law. It has been confirmed by experiments by the inventor that a polyethylene film hardly obstructs far-infrared rays having a wavelength of about 10 microns. In this way, the temperature of the liquid that radiates infrared rays quickly decreases. The liquid with reduced temperature behaves as a cryogen and keeps the temperature of the store low.

  As described above, the non-electric refrigerator according to the present invention emits infrared rays directly from the liquid forming the storage room through the multilayer polyethylene film to the sky. Since the multistage heat transfer including the natural convection of water is not required unlike the non-electric refrigerator of the cited patent document, a non-electric refrigerator that cools in a short time is realized. FIG. 3 shows how heat is transmitted between the two parties.

  In the non-electric refrigerator according to the present invention, a bag or a container filled with a liquid is arranged around the storage room. Since a watertight metal container is not required unlike the non-electric refrigerator of the cited patent document, an inexpensive and lightweight non-electric refrigerator is realized.

  Thus, a non-electric refrigerator that is lightweight, inexpensive, and cools in a short time is realized.

FIG. 1 is a sectional view of a non-electric refrigerator according to the present invention. FIG. 2 is a cross-sectional view of the non-electric refrigerator of the cited patent document. FIG. 3 is an explanatory view of how heat is transmitted in the non-electric refrigerator of the present invention and the non-electric refrigerator of the cited patent document. FIG. 4 is a cross-sectional view when an outer lid, an inner plate or container, and an outer plate or container are added.

  The upper lid is composed of a frame and a multilayer polyethylene film. The frame is a substantially square frame, and the material is not limited. The multilayer polyethylene film may be attached to a frame by attaching a plurality of thin polyethylene films attached in layers via a spacer, or a thin polyethylene film may be attached to the front and back of the frame. The spacer may be only the inner side of the frame, or may be mounted in a striped pattern or a grid pattern. In any case, the area of the spacer is preferably narrow in order to increase the transmittance of far infrared rays. The thickness of the polyethylene film is not specified, but it is preferably as thin as possible to increase the transmittance of far infrared rays. On the other hand, the thicker the better the durability. In order to increase durability, the polyethylene film may be reinforced with fibers or nets on a thin polyethylene film. However, it is preferable to keep the area of the fiber or net to a minimum so as not to prevent transmission of far infrared rays. As claimed in claim 5, the multi-layer polyethylene film may be a so-called bubble cushioning material processed so as to form a large number of independent spaces between layers. The foam cushioning material may be molded from two polyethylene films, but the one molded from three polyethylene films is more preferable for improving heat insulation. Further, as appealed in claim 9, a multilayer polypropylene film may be used instead of the multilayer polyethylene film. Although the polypropylene film is slightly inferior to the polyethylene film in terms of far-infrared transmittance, the polypropylene film is more advantageous in terms of heat resistance and weather resistance, so the polypropylene film may be more advantageous depending on the use environment.

  As for the bag or container filled with the liquid, the transparent bag / container may be filled with the transparent liquid. However, in order to increase the infrared radiation efficiency, the transparent bag / container as described in claim 2 is used. It is preferable to fill with black or dark liquid, or as described in claim 3, the outer surface is a black or dark bag or container, or the surface of the bag or container is painted black or dark.

  The upper lid may be installed substantially horizontally as illustrated in FIG. 1, but may be installed at an inclination. It is selected depending on the installation location and usage of the non-electric refrigerator.

Claim 4 claims that all or part of the inner side surface and the inner bottom surface of the storage chamber is surrounded by a black or dark plate or container 8 on the inner surface. This plate or container may be formed by attaching a metal thin plate to a wooden, metal or resin frame, or may be formed by joining the metal thin plates together, or may be integrally formed with the metal thin plate. In any case, the metal thin plate occupies all or most of the inside of the container. The material and thickness of the metal sheet are not specified. If necessary, coating or chemical treatment is performed so that the inner surface of the metal thin plate is black or dark.

  The material of the heat insulating material may be any material having good heat insulating properties such as expanded polystyrene, glass wool, rock wool, sponge, rice husk. Although the thickness of the heat insulating material is not specified, it is preferably as thick as possible. Usually, a thickness of about 5 centimeters is selected.

  The material, thickness and dimensions of the bag or container filled with the liquid are not specified, but the thinner the better, the better the heat transfer. For example, a long and thin polyethylene bag is the most preferred form. Even if it is not a bag, it may be a resin container integrally molded or dividedly molded, or it may be a ready-made plastic container such as a PET bottle. A metal container such as a beverage can is acceptable.

  As appealed in claim 6, the liquid filled in the bag or container may be water, alcohol or antifreeze. A latent heat storage agent with a phase change between the solid phase and the liquid phase may be used.

  The periphery of the heat insulating material may be left as it is, but as described in claim 7, it is preferable in terms of strength and durability to be surrounded by a metal, wood, or resin plate. It does not matter if it is housed in an integrally molded box. The periphery of the plate may be left as it is, but it is preferable in terms of cooling performance to coat visible light and infrared rays by covering with an aluminum thin plate, an aluminum vapor deposition film or the like.

  There may be nothing on the outside of the top lid, but as stated in claim 8, it is better to attach a highly heat-insulating and openable outer lid and close it during the daytime, in cloudy weather, or when it rains. It is preferable in terms of performance. The outer lid may be made of only a hard heat insulating material, but a method of attaching a heat insulating material such as expanded polystyrene to a plate of wood, metal, or resin is most preferable.

Since the refrigerator according to the present invention does not consume energy such as electric power, gas, oil, etc., there is a possibility that a refrigerator is required when it is necessary in a country or region where it is difficult to obtain such energy. It is not limited to ordinary household refrigerators, but may be used for refrigeration of agricultural and marine products. In addition, there is a possibility that people who are sensitive to environmental problems will be welcomed as refrigerators with zero environmental impact.

1 Multi-layer polyethylene film

2 frames

3 Top cover

4 bags or containers

5 Liquid

6 storage room

7 Insulation

8 Board or container

9 Outer lid

10 Transparent plate

11 Partition plate

12 Opaque plate

13 Door

14 Storage room

15 housing

16 liquid

17 Insulation or insulation space

18 Board or container

Claims (9)

Openable / closable upper lid 3 composed of a multilayer film 1 having an air layer between layers and a frame 2, one or a plurality of bags or containers 4 held in a substantially box shape, a liquid 5 filled in the bags or containers, It consists of a storage chamber 6 formed by a bag or container and the upper lid, a heat insulating material 7 surrounding the outside of the bag or container, the film is made of polyethylene, and all or part of the bag or container is transparent. A refrigerator characterized by that. 2. The refrigerator according to claim 1, wherein the filled liquid is black or dark. The refrigerator according to claim 1, wherein all or part of the outer surface of the bag or container is black or dark. Openable / closable upper lid 3 composed of a multilayer film 1 having an air layer between layers and a frame 2, one or a plurality of bags or containers 4 held in a substantially box shape, a liquid 5 filled in the bags or containers, It consists of a storage chamber 6 formed by a bag or container and the upper lid, and a heat insulating material 7 surrounding the outside of the bag or container, and all or part of the inner side surface and the inner bottom surface of the storage chamber has a black or dark inner surface. The refrigerator according to claim 1, wherein the refrigerator is surrounded by a certain plate or container 8. The refrigerator according to claim 1, 2, 3, 4, wherein the multilayer film is a so-called bubble cushioning material processed so as to form a large number of independent spaces between the layers. 6. The refrigerator according to claim 1, wherein the liquid is water, an antifreeze or a latent heat storage material. The refrigerator according to claim 1, 2, 3, 4, 5, or 6, wherein the heat insulating material is surrounded by a metal or wood or resin plate or container 18.
The refrigerator according to claim 1, 2, 3, 4, 5, 6, or 7, wherein an outer lid (9) that is heat insulating and freely openable and closable is provided at an upper portion of the upper lid.
9. The refrigerator according to claim 1, wherein a material of the multilayer film is polypropylene.

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