JP5934883B2 - freezer - Google Patents

Description

  The present invention relates to a freezer that freezes, cools or keeps medical materials such as foods, pharmaceuticals, biomaterials, proteins, and DNA that require a cryogenic environment.

  Conventionally, this kind of freezer is equipped with the internal fan which circulates the cool air of an evaporator surrounding area in a warehouse, and the freezer which freezes food is known (for example, refer to patent documents 1).

  Hereinafter, the freezer will be described with reference to FIG.

  As shown in FIG. 5, in the storage 101 of the freezer, the cold air cooled by the evaporator 102 by the refrigeration cycle (not shown) is transferred to the food 105 placed on the tray 104 in the storage 101 by the internal fan 103. The cold air blown and blown is bent against the partition 106 and returned to the evaporator 102 to be recooled to form a cold air circulation airflow.

  Cold air circulates in the freezer storage 101 by the internal fan 103 to cool the food 105 in the storage 101. The arrows in FIG. 5 indicate the flow direction of the cold air circulating air.

JP 2001-116422 A

  Such a conventional freezer has a configuration in which the inside of the freezer is forcedly circulated in the freezer by a circulation fan. In a cryogenic environment of about ℃, it is too cold, there is no appropriate lubricating oil, the circulating fan with the drive part is prone to failure, and if the lubricating oil is used in a freezer that stores biological materials, etc., There was a problem that a risk of contamination could arise.

  Therefore, the present invention solves the above-described conventional problems, and forced air circulation by a circulation fan that is likely to fail in a cryogenic environment of −60 ° C. or less, about −60 ° C. to −120 ° C., or about −80 ° C. Instead, it efficiently creates a cold natural circulation air flow by natural cold convection and efficiently creates a cryogenic environment of -60 ° C or lower, approximately -60 ° C to -120 ° C, approximately -80 ° C. An object is to provide a freezer that performs.

  In order to achieve this object, the present invention comprises a cooling means for cooling air and a frozen storage space for cooling and storing the air by the cooling means in the freezer. The wall portion, the bottom portion, and the upper portion are thermally insulated with a heat insulating material, a cold air circulation plate is provided between the cooling means and the frozen storage space, and the cold air circulation plate causes the cold air circulation plate to It is a freezer that cools the frozen storage space.

  Thereby, by providing a cold air circulation plate between the cooling means and the frozen storage space, the inside of the freezer can be efficiently caused, a cold natural convection, that is, a cold natural circulation air flow, can be efficiently performed, -60 ℃ or less, The present invention provides a freezer that creates a cryogenic environment of approximately -60 ° C to -120 ° C and approximately -80 ° C.

  In addition, the freezer according to claim 1 provided with a cooling means and a cold air circulation plate around the frozen storage space, and can efficiently cause cold natural convection, that is, a cold natural circulation air flow in the freezer. The present invention provides a freezer that efficiently creates a cryogenic environment of −60 ° C. or less, about −60 ° C. to −120 ° C., and about −80 ° C.

  Moreover, it is set as the freezer of Claim 1 or 2 which used the cold-air circulation board as SUS, and formation of the cold natural circulation airflow in the freezer by a cold-air circulation board by making the cold-air circulation board into SUS, and a freezer In particular, the present invention provides a freezer that efficiently creates a cryogenic environment of −60 ° C. or less, about −60 ° C. to −120 ° C., or about −80 ° C. by cold heat radiation to a frozen storage space.

According to the present invention, there are provided a wall portion, a bottom portion, and an upper portion in the periphery, a cooling means for cooling the air, and a frozen storage space for cooling and storing the air by the cooling means in the freezer, the wall portion, Insulating the bottom and the top with a heat insulating material, comprising a cold air circulation plate between the cooling means and the frozen storage space, cooling the frozen storage space by a cold natural circulation airflow by the cold air circulation plate , The cooling means and the cold air circulation plate are provided around the cryopreservation space, the upper part is a heat insulating lid that can be freely opened and closed, and the cold air through which the cold natural circulation airflow passes through the upper part that is the heat insulating lid that can be freely opened and closed. radiation cold reflector plate is provided through the natural circulation air flow region, out of the frozen storage space freezer to open and close the radiation cold reflector plate with opening and closing of the upper, by that the configuration of, cold cryopreservation in space by radiation Hardly more escape, also by providing the cold air circulating plate between the cooling means and the frozen storage space, the inside of the freezer efficiently, it is possible to cause the cold air natural circulation air flow is cold air convection, efficiently - The effect of providing a freezer that creates a cryogenic environment of 60 ° C. or lower, about −60 ° C. to −120 ° C., and about −80 ° C. can be obtained.

Plan sectional drawing of the freezer of Embodiment 1 of this invention Same longitudinal section Cross-sectional plan view of the cryopreservation space completely surrounded by a cold air circulation Same longitudinal section Vertical section of a conventional freezer

The freezer according to claim 1 of the present invention includes a wall portion, a bottom portion, and an upper portion in the periphery, a cooling means for cooling the air, and a freezing storage space for cooling and storing the air by the cooling means in the freezer. The wall portion, the bottom portion, and the upper portion are insulated by a heat insulating material, and a cold air circulation plate is provided between the cooling means and the frozen storage space, and the cold storage space is provided by a cold natural circulation air flow by the cold air circulation plate. was cooled, the provided with the cooling means around the frozen storage space the cold air circulating plate, the upper has a openable insulation cover, cool naturally to the upper on which it is openable insulation cover It has a configuration in which a radiant cooling / reflecting plate is provided through a cold natural circulation air flow region through which a circulating air flow passes, and the refrigeration / reflecting reflector is also opened / closed together with opening / closing of the upper part .

This makes it difficult for the cold heat in the freezing storage space to escape outside the freezing storage space due to radiation, and by providing a cold air circulation plate between the cooling means and the freezing storage space, the inside of the freezer can be efficiently and naturally cooled. The effect of providing a freezer that can cause a cold natural circulation airflow that is a convection and that creates an extremely low temperature environment of -60 ° C or lower, about -60 ° C to -120 ° C, and about -80 ° C efficiently. Play.

Further, the cold air circulating plate stainless, i.e. may be configured freezer, that of claim 1, wherein the a SUS. Thus, by setting the cold air circulation plate to SUS, the formation of the cold natural circulation air flow in the freezer, which is natural convection by the cold air circulation plate, and the cold heat radiation to the freezer storage space in the freezer, efficiently, -60 ° C Hereinafter, a freezer that creates an extremely low temperature environment of about -60 ° C to -120 ° C and about -80 ° C is provided. Moreover, a heat insulating material has the structure of the freezer of Claim 1 or 2 which has moisture resistance and heat insulation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 and 2, in the freezer 1, the wall portion 2, the bottom portion 3, and the upper portion 4 around the freezer 1 are thermally insulated by a heat insulating material 5. Although the upper part 4 is not shown, it is a heat-insulating lid that can be freely opened and closed. From the upper part 4, food, pharmaceuticals, biomaterials, proteins, DNA, etc. that require a cryogenic environment in the frozen storage space 6 in the freezer 1 A target product such as a medical material is taken in and out, and frozen, cooled, or kept cold in the frozen storage space 6 and stored.

  In the freezer 1, although not shown, the evaporator 7 forms a refrigeration cycle, and the evaporator 7 as a cooling means for forming the refrigeration cycle is placed around the frozen storage space 6. The evaporator 7 freezes, cools, or keeps the frozen storage space 6 in the freezer 1.

  A cold air circulation plate 8 is provided between the frozen storage space 6 and the evaporator 7, and an evaporator cooling space 9 in which the frozen storage space 6 and the evaporator 7 are placed is partitioned by the cold air circulation plate 8. Due to the cold air circulation plate 8 that partitions the evaporator cooling space 9, natural convection occurs between the frozen storage space 6 and the evaporator cooling space 9, and a cold natural circulation airflow is formed.

  The evaporator 7 serving as a cooling means cools the air around the evaporator 7 to a very low temperature, and then descends, enters the frozen storage space 6 from the lower side of the cold air circulation plate 8, rises, and rises above the cold air circulation plate 8. Then, natural convection occurs that enters the evaporator cooling space 9 and is cooled again by the evaporator 7 to form a cold natural circulation airflow.

  The evaporator 7 as the cooling means and the cold air circulation plate 8 form a cold natural circulation air flow in the freezer 1 that is a natural cold convection, and the freezer 1 and the frozen storage space 6 are at −60 ° C. or less, approximately −60 ° C. It is frozen, cooled, or kept in a cryogenic environment of about -120 ° C or about -80 ° C.

  The freezer 1 only needs to be able to freeze, cool, or keep a target product such as a biomaterial that requires a cryogenic environment. For example, the freezer 1 is about 1,800 L × 1, 100 W × 1, 200 H, and a wall around the freezer 1. The heat insulating material 5 having a thickness of about 150 mm is affixed to a plate material having strength and rigidity such as SUS, and the heat insulating material 5 is affixed to the upper portion 4 which is a heat insulating lid that can be freely opened and closed. Yes.

  The space | interval of the cold air circulation board 8 and the bottom part 3 of the freezer 1 and the space | interval of the cold air circulation board 8 and the upper part 4 of the freezer 1 should just be a grade in which the cold natural circulation airflow which is a natural convection is formed, respectively, for example, about 50 each. About 200 mm, for example, about 100 mm.

  In the present embodiment, the evaporator 7 and the cold air circulation plate 8 are provided in the freezer 1 at four locations around the frozen storage space 6, but a cold natural circulation airflow is formed, and the freezer 1 and the frozen storage space 6 are provided. , -60 ° C. or less, about −60 ° C. to about −120 ° C., about -80 ° C., and may be frozen, cooled, or kept cool. Depending on the size of the freezer 1, You may determine suitably with two places of the opposing surface of the frozen storage space 6, or one place.

  The cold air circulation plate 8 may divide the frozen storage space 6 and the evaporator cooling space 9 in which the evaporator 7 is placed to form a cold natural convection, that is, a cold natural circulation air flow. Also, there are stainless steels, such as SUS, metal plates, etc., which have good cold heat radiation characteristics and good radiant cold heat reflectivity.

  If the surface of the cold air circulation plate 8 is mirror-finished, the reflection of radiant heat and radiant cold heat is good, and the cold air circulation plate 8 provided around the frozen storage space 6 makes it more efficient in the frozen storage space 6. The target product can be cooled.

  Examples of the cool air circulation plate 8 having good reflectivity of radiant heat and radiant cold include SUS or a metal plate whose surface is plated with gold or chrome. The thickness of the SUS or the metal plate as the cold air circulation plate 8 may be such that the cryopreservation space 6 and the evaporator cooling space 9 are straightly partitioned without bending, for example, about 0.3 to 0.8 mm, for example, About 0.5 mm.

  A metal plate that is easily rusted by preventing contamination in the frozen storage space 6 may be plated with gold plating or chrome plating so that rust does not appear or the inside of the frozen storage space 6 is not contaminated. .

  Stainless steel with good thermal conductivity and cold radiation characteristics, that is, SUS, a metal plate, etc. is cooled by cold radiation of the evaporator 7 or cold convection, and SUS with a good thermal conductivity and cold radiation characteristic is cooled. Cold heat is radiated from substantially the entire surface to the inside of the freezer 1 and the frozen storage space 6, and the inside of the freezer 1 and the frozen storage space 6 are at −60 ° C. or lower, about −60 ° C. to −120 ° C., or about −80 ° C. Contributes to freezing, cooling, or keeping cold in low-temperature environments.

  Due to the formation of the cold natural circulation air flow in the freezer 1 of the cold air circulation plate 8 and the cold heat radiation to the freezer 1 and the freezer storage space 6, the freezer 1 and the freezer storage space 6 have a temperature of -60 ° C or less, approximately -60 ° C. It is frozen, cooled, or kept in a cryogenic environment of about -120 ° C or about -80 ° C.

  The heat insulating material 5 has moisture resistance and heat insulation, and is made of, for example, hard urethane foam having good moisture resistance and heat insulation. For example, a non-breathable hard urethane foam is used. The upper part 4 serving as a heat insulating lid is insulated by a heat insulating material 5 having a thickness of about 150 mm, for example, and the freezer 1 is insulated from the external environment of the freezer 1.

  When using a fiber-based heat insulating material such as glass wool for the heat insulating material 5, cover the periphery of the heat insulating material 5 with a moisture-proof sheet such as a moisture-proof sheet such as a polyethylene air-tight sheet or an aluminum foil air-tight material. To prevent the penetration of moisture components into the heat insulating material, the freezing of the moisture components entering, the damage of the heat insulating material due to freezing and expansion, and the deterioration of the heat insulating performance.

  FIGS. 3 and 4 show the case where the cryopreservation space 6 is completely surrounded by the cold air circulation plate 8.

  As shown in FIG. 3, the radiation of the cold storage space 6 is radiated around the cold storage space 6 so that the cold heat radiation from the cold storage space 6 or the reflection of the cold heat from the cold air circulation plate 8 does not leak from the cold storage space 6. It may be completely surrounded by a cold air circulation plate 8 such as SUS having good cold reflection characteristics. The completeness in this case may be such that the cold heat radiation from the frozen storage space 6 or the reflection of the radiant cold heat by the cold air circulation plate 8 does not substantially leak from the frozen storage space 6.

  For example, even if there is a gap between the adjacent cold air circulation plates 8, the cold storage from the cold storage space 6 or the reflection of the radiant cold heat from the cold air circulation plate 8 leaks out from the gap. What is necessary is just a grade which does not affect the freezing in the space 6, cooling, or cold storage performance.

  If the periphery of the frozen storage space 6 is completely surrounded by a cold air circulation plate 8 such as SUS having good reflection characteristics of radiant cold heat, the cold heat in the frozen storage space 6 becomes difficult to escape out of the frozen storage space 6 due to radiation, The target product in the frozen storage space 6 can be further frozen, cooled, or kept cold.

  As shown in FIG. 4, radiant cold heat reflectors 12 and 13 such as SUS are provided on the upper and lower portions of the frozen storage space 6 via cold natural circulation airflow regions 10 and 11 through which the cold natural circulation airflow passes, respectively. It may be provided.

  In that case, the radiant cooling / reflecting plate 12 such as SUS in the upper part of the frozen storage space 6 may be hung on the upper part 4 serving as an openable and closable heat insulating cover with a hanging rod 14 made of fiber reinforced plastic or the like.

  Along with opening and closing of the upper part 4 serving as a heat insulating lid, a radiant heat reflector 12 such as SUS on the upper surface of the frozen storage space 6 is also opened and closed.

  In this way, the periphery of the frozen storage space 6, the upper part, and the lower part are surrounded by the cold air circulation plate 8 such as SUS and the radiant cooling / reflecting plates 12, 13, It becomes difficult to escape from the outside of the frozen storage space 6, and the target product in the frozen storage space 6 can be further frozen, cooled, or kept cold.

  The freezer according to the present invention includes a cold air circulation plate between the cooling means and the frozen storage space, and cools the frozen storage space by a cold natural circulation airflow by the cold air circulation plate. Or, it is useful as a freezing space in which a circulation fan cannot be used because it is too cold, a freezer that efficiently freezes, cools, or keeps the cooling space cool.

DESCRIPTION OF SYMBOLS 1 Freezer 2 Wall part 3 Bottom part 4 Upper part 5 Thermal insulation material 6 Freezing preservation space 7 Evaporator 8 Cold air circulation board 9 Evaporator cooling space

Claims (3)

A wall portion, a bottom portion, and an upper portion are provided in the periphery, and a cooling means for cooling the air and a freezing storage space for cooling the air by the cooling means and storing it in a freezer are provided in the freezer, the wall portion, the bottom portion, and the upper portion And a cold air circulation plate between the cooling means and the frozen storage space, cool the frozen storage space by a cold natural circulation air flow by the cold air circulation plate , and around the frozen storage space with the cold air circulating plate and the cooling means, the upper portion has a openable insulation cover, through the cold air natural circulation air flow area through which the cold air natural circulation air flow to the upper on which it is openable insulation cover A freezer that provides a radiant cooling / reflecting plate and that opens and closes the radiant cooling / reflecting plate together with opening and closing of the upper part . Freezer cold air circulation plate stainless, i.e. according to claim 1 wherein the SUS. The freezer according to claim 1 or 2, wherein the heat insulating material has moisture resistance and heat insulating properties.

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