WO2017154735A1 - 超低温フリーザ - Google Patents
超低温フリーザ Download PDFInfo
- Publication number
- WO2017154735A1 WO2017154735A1 PCT/JP2017/008321 JP2017008321W WO2017154735A1 WO 2017154735 A1 WO2017154735 A1 WO 2017154735A1 JP 2017008321 W JP2017008321 W JP 2017008321W WO 2017154735 A1 WO2017154735 A1 WO 2017154735A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ultra
- low temperature
- door
- heat insulating
- outer door
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/04—Self-contained movable devices, e.g. domestic refrigerators specially adapted for storing deep-frozen articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
- F25D23/025—Secondary closures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
- F25D23/028—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/062—Walls defining a cabinet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/065—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2201/00—Insulation
- F25D2201/10—Insulation with respect to heat
- F25D2201/14—Insulation with respect to heat using subatmospheric pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2323/00—General constructional features not provided for in other groups of this subclass
- F25D2323/02—Details of doors or covers not otherwise covered
- F25D2323/023—Door in door constructions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2323/00—General constructional features not provided for in other groups of this subclass
- F25D2323/02—Details of doors or covers not otherwise covered
- F25D2323/024—Door hinges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Definitions
- the present disclosure relates to an ultra-low temperature freezer including a casing and a door attached to the casing with a hinge.
- the technology related to the ultra-low temperature freezer is described as a refrigeration apparatus in Patent Document 1, for example.
- the refrigeration apparatus includes a housing and a door that is opened and closed by a user.
- the housing is open on the front side and accommodates an object.
- the door is attached to the housing by a plurality of hinges. Specifically, one hinge piece of each hinge is attached to the first side surface of the housing, and the other hinge piece is attached to the first side surface of the door.
- grips at the time of opening / closing of a door is provided in the 2nd side surface facing a 1st side surface in a door.
- a flat hinge (hereinafter simply referred to as a hinge) is used to achieve a storage environment in an ultra-low temperature range (eg -50 ° C or lower).
- a door is attached to the housing so that it can be opened and closed.
- the door rotates around a shaft inserted through a bearing hole formed in the upper end surface and the lower end surface of the door.
- a bearing hole is formed in a connecting portion of two pairs of hinge pieces, and each hinge piece relatively rotates around a rotation shaft inserted through the bearing hole.
- the rotation center of the door is substantially arranged on the first side of the ultra-low temperature freezer. Therefore, there is a problem that when the door is opened, the door is easily in contact with an object adjacent to the first side surface.
- an object of the present disclosure is to provide an ultra-low temperature freezer that can reduce contact of a door with an object next to the first side surface.
- an exterior body having a first side surface and a second side surface facing the first side surface in a lateral direction, and an accommodation space that is provided inside the exterior body and opens toward the front are formed.
- a first hinge piece and a second hinge piece that are rotatable relative to each other about the rotation axis, wherein the first hinge piece is attached to the second side surface, and rotates around the rotation axis.
- FIG. 2 is a top view of the ultra-low temperature freezer of FIG. 1 and is a view seen through a storage space. It is a figure which shows the housing
- the ultra-low temperature freezer 1 according to an embodiment of the present disclosure will be described in detail with reference to the drawings.
- ⁇ 1-1 the x-axis indicates the lateral direction of the ultra-low temperature freezer 1, and more specifically indicates the direction from the left side to the right side when the user faces the ultra-low temperature freezer 1.
- the y-axis indicates the front-rear direction of the ultra-low temperature freezer 1, and more specifically indicates the direction from the back side toward the front side (ie, the front direction) at the time of facing up.
- the z-axis indicates the vertical direction of the ultra-low temperature freezer 1, and more specifically indicates the direction (that is, the vertical upward direction) directed vertically upward from the installation surface (substantially horizontal plane) of the ultra-low temperature freezer 1.
- the ultra-low temperature freezer 1 basically includes a housing 2, an outer door 3, and a machine room 4.
- the structure which cannot be visually recognized from the outside like the below-mentioned heat insulating materials 23 and 33 is shown with the broken line.
- the housing 2 generally includes, for example, a metal exterior body 21 and an interior body 22, and a plurality of heat insulating materials 23.
- the exterior body 21 defines the outer shape of the housing 2.
- the interior body 22 is provided inside the exterior body 21 and defines a space (hereinafter referred to as an accommodation space) A for accommodating a storage object.
- the accommodation space A opens toward the front.
- the plurality of heat insulating materials 23 are preferably made of a vacuum heat insulating panel, and are provided between the exterior body 21 and the interior body 22 on the exterior body 21 side. 1 and 2 do not show all the heat insulating materials 23 for convenience. More specifically, in FIG.
- a heat insulating layer is formed between the interior body 22 and the heat insulating material 23 by injecting and foaming a polyurethane laminate or the like, or a heat insulating material. This heat insulating layer is shown with a right-down hatching in FIG.
- the outer door 3 includes, for example, a metal interior body 31 and an exterior body 32, and at least one heat insulating material 33 disposed on the interior body 31 side in a space between the interior body 31 and the exterior body 32.
- the outer door 3 is rotated around a rotation shaft 343 (described later) of the three hinges 34 by a user operation, for example, and opens and closes.
- the outer door 3 closes the opening of the accommodation space A when closed.
- the outer door 3 is opened, the user can open and close the inner door 5 described later.
- the heat insulating material 33 consists of a vacuum heat insulating panel. In FIG. 1, at least one heat insulating material 33 is illustrated by a broken line. Moreover, in FIG.
- the vacuum heat insulation panel which comprises the heat insulating material 33 is attached
- a heat insulating layer is formed between the outer body 32 and the heat insulating material 33 by injecting and foaming a polyurethane laminate or a heat insulating material. This heat insulating layer is shown with a right-down hatching in FIG.
- the outer door 3 has the rotation shaft 343 of each hinge 34 as the center of rotation. Therefore, in the following, reference numeral 343 may be attached to the rotation center of the outer door 3.
- the outer door 3 is provided with a handle 35 that the user grasps when opening and closing.
- the handle 35 has a lock mechanism 36 in this embodiment.
- the lock mechanism 36 locks the outer door 3 in a closed state or releases the locked state so that the outer door 3 can be opened. Since the outer door 3 is locked by the lock mechanism 36, the airtightness and heat insulation of the ultra-low temperature freezer 1 can be increased.
- a control panel 37 is provided on the front surface of the outer door 3.
- the control panel 37 includes a control circuit board (not shown) inside and a touch panel that can be operated and visually recognized by the user.
- the touch panel is a device that allows the user to set the target temperature (that is, the target value of the internal temperature) of the storage space A, and various information such as the current set temperature (target value of the internal temperature). Is a device that displays.
- the machine room 4 is provided in the lower part of the housing
- the machine room 4 stores a well-known binary refrigeration cycle (also called a cascade cycle).
- a well-known binary refrigeration cycle also called a cascade cycle.
- the low temperature side evaporator is disposed between the exterior body 21 and the interior body 22 of the housing 2 so as to surround the accommodation space A.
- the cascade capacitor is disposed on the back side of the storage space A. The remaining elements are stored in the machine room 4.
- the heat insulating material 23 of the housing 2 is arranged on the exterior body 21 side, and a polyurethane laminate or the like or a heat insulating material is injected and foamed between the internal body 22 and the heat insulating material 23. Since the layer is formed, the temperature difference between the front surface and the rear surface of the heat insulating material 23 (that is, the vacuum heat insulating panel) can be reduced, and as a result, the occurrence of cracks in the vacuum heat insulating panel can be suppressed. Note that the details of the two-stage refrigeration cycle are described in detail in Patent Document 1 and the like, so detailed description in this embodiment is omitted.
- two unit multi-stage refrigeration cycles that are controlled independently of each other may be provided inside the machine room 4.
- an evaporator provided in each unit multi-stage refrigeration cycle is arranged inside the housing 2 so as to surround the accommodation space A. Even if a problem occurs in one unit multi-stage refrigeration cycle, the inside of the storage space A is maintained in an ultra-low temperature region by the other unit multi-stage refrigeration cycle.
- the ultra-low temperature freezer 1 preferably further includes at least one inner door 5 and at least one storage box 6 as shown in FIG.
- the inner door 5 is made of resin, for example, and is attached to at least one inner door-side hinge 51 at the right end of the opening of the storage space A, and is opened and closed by a user operation by rotating around a rotation axis parallel to the z axis. Can be attached freely.
- the inner door 5 closes the opening of the accommodation space A when closed.
- the inner door 5 is opened, the user can access the accommodation space A.
- Such an inner door 5 enhances the heat insulating effect in the accommodation space A.
- the storage box 6 accommodates a storage object and is placed on a gantry (not shown) provided in the accommodation space A.
- a user opens the outer door 3 and the inner door 5, and pulls out the storage box 6 from the storage space A first.
- Outer surface of housing 2 / outer door 3 >> As shown in FIGS. 3A and 3B, the outer surface of the housing 2 includes a housing-side left side surface S1, a housing-side right side surface S2, a back surface S3, and a housing-side peripheral edge S4. In addition, the outer surface includes a top surface and a bottom surface that face each other in the vertical direction, but these top surface and bottom surface are not shown in FIGS. 3A and 3B because they are not the main part of the present disclosure.
- the left side surface S1 and the right side surface S2 are examples of the first side surface and the second side surface, and are opposed to each other in the left-right direction, and are formed of, for example, a plane substantially parallel to the yz plane.
- the right side surface S2 faces the left side surface S1 at a position separated from the left side surface S1 by about 1030 mm in the lateral direction (that is, the x-axis direction) (see FIG. 3A).
- the back surface S3 and the peripheral edge S4 face each other in the front-rear direction, and include, for example, a surface substantially parallel to the zx plane.
- the peripheral edge S4 faces the back surface S3 at a position separated from the back surface S3 by about 793 mm in the y-axis direction (see FIG. 3A).
- the peripheral edge S4 surrounds the opening of the accommodation space A.
- the outer surface of the outer door 3 has a door-side left side surface S5, a door-side right side surface S6, a front surface S7, an inner surface S8, a left connection surface S9, and a right connection.
- Surface S10 a door-side left side surface S5
- a door-side right side surface S6 a front surface S7
- an inner surface S8 a left connection surface S9
- Surface S10 a door-side left side surface S10
- the left side surface S5 and the right side surface S6 are examples of the third side surface and the fourth side surface and face each other in the left-right direction, and include, for example, a surface substantially parallel to the yz plane.
- the right side S6 faces the left side S5 at a position about 1030 mm away from the left side S5 in the x-axis direction (see FIG. 3A).
- the left side surface S5 and the right side surface S6 are directed forward (that is, in the y-axis direction) from a left end portion and a right end portion of an inner surface S8 described later.
- the length in the y-axis direction of the left side surface S5 and the right side surface S6 is, for example, about 60 mm (see FIG. 3B).
- the front surface S7 and the inner surface S8 face each other and include, for example, a surface substantially parallel to the zx plane.
- the inner surface S8 faces the outer surface S7 at a position away from the outer surface S7 by about 115 mm in the rearward direction (that is, in the reverse direction of the y axis). Further, the distance in the y-axis direction between the both end portions in the x-axis direction and the outer surface S7 at the periphery of the inner surface S8 is about 90 mm (see FIG. 3B). Further, the peripheral edge portion on the inner surface S8 faces the above-mentioned casing-side peripheral edge S4 in the y-axis direction when the outer door 3 is closed.
- a resin breaker is preferably attached to each of the housing side peripheral edge S4 (described above) and the inner surface S8.
- packing or the like is attached to either one of the peripheral edge S4 and the inner surface S8 via a breaker.
- the inner surface S8 faces the casing side peripheral edge S4 in close proximity, thereby crushing the packing and breaker interposed therebetween.
- the left connection surface S9 includes a flat surface that connects the left end portion of the outer surface S7 and the front end portion of the left side surface S5.
- the right connection surface S10 includes a flat surface that connects the right end E1 of the outer surface S7 and the front end E2 of the right side S6.
- the right end E1 of the outer surface S7 is provided in front of the front end E2 of the right side S6.
- the right connection surface S10 is parallel to the rotation shaft 343 and forms a straight line when viewed in plan from the z-axis direction. In other words, even when the outer door 3 is cut at an arbitrary xy plane in the z-axis direction, the right connection surface S10 has substantially the same cross-sectional shape.
- the right connection surface S10 is formed between the right side surface S6 and the right end A1 of the accommodation space A in a plan view from the y-axis direction.
- the outer door 3 preferably has a symmetrical shape.
- the connection surfaces S9 and S10 have shapes that are plane-symmetric with respect to each other with respect to the longitudinal center plane of the ultra-low temperature freezer 1.
- the longitudinal center plane is a plane that passes through the center of the cryogenic freezer 1 in the x-axis direction and is parallel to the yz plane.
- Each hinge 34 has the 1st hinge piece 341 and the 2nd hinge piece 342, and the rotating shaft 343 extended in a perpendicular direction (z-axis direction) as clearly shown in FIG. 3B.
- a bearing hole is formed in a connecting portion of both the hinge pieces 341 and 342, and the hinge pieces 341 and 342 are relatively rotated around a rotating shaft 343 inserted through the bearing hole.
- the outer door 3 is attached to the housing 2 so as to be opened and closed by using three hinges 34 having such a configuration (see FIG. 1).
- first hinge pieces 341 are fixedly attached to the three locations on the housing-side right side surface S2 with screws or the like, and the second hinge pieces 342 are fixed to the three locations on the door-side right side surface S6. Attached. Accordingly, the length of the right side surface S6 in the y-axis direction is designed in consideration of the length of the second hinge piece 342 in the y-axis direction.
- the thickness of the housing and the door is suppressed without impairing the heat insulating performance, and the right front corner of the door is the right end of the outer surface S7.
- It is a flat surface that connects E1 and the front end E2 of the right side surface S6 (that is, the right connection surface S10).
- the distance in the y-axis direction from the rotation center 343 of the outer door 3 to the rear end portion of the right connection surface S10 (ie, the front end portion E2 of the right side surface S6) is the front end portion (ie, outer surface) of the right connection surface S10 from the rotation center 343.
- the ultra-low temperature freezer 1 can increase the distance in the y-axis direction from the inner surface S8 to the outer surface S7. Therefore, even if the inner door 5 is thinned, the ultra-low temperature freezer 1 can obtain the necessary heat insulation performance. Further, by thinning the inner door 5 while shifting the outer surface S7 of the outer door 3 forward, the user can easily take out the storage box 6 from the storage space A. This is because the amount of rotation (that is, the opening angle) of the outer door 3 necessary for rotating the inner door 5 by 90 ° from the closed position is small. In the case of the present ultra-low temperature freezer 1, as illustrated in FIGS.
- the outer door 3 is 86.
- the inner door 5 opens 90 °.
- the storage box 6 can be removed from the storage space A.
- the space occupied by the ultra-low temperature freezer 1 in the x-axis direction is 1209 mm at the maximum.
- the outer door is thin and the inner door is thick like the ultra-low temperature freezer according to the comparative example, if the inner door opens 106 ° and the outer door does not rotate 103.5 °, the storage box is taken out. (See FIG. 4).
- the maximum space occupied by the ultra-low temperature freezer of the comparative example in the x-axis direction was 1366.3 mm.
- the vacuum heat insulating panel constituting the heat insulating material 33 can be disposed close to the inner surface S8 side.
- the heat insulating material 33 can be separated from the control panel 37 provided on the outer surface S ⁇ b> 7 of the outer door 3.
- the heat insulating material 33 is disposed on the inner surface S8 side and is isolated from the outer surface S7.
- the temperature of the front surface of the heat insulating material 33 is not easily affected by the outside air temperature, and the low temperature side evaporator is not disposed in the outer door 3, so the front surface of the heat insulating material 33 (that is, the vacuum heat insulating panel).
- the rear surface can be reduced in temperature, and as a result, the occurrence of cracks in the vacuum insulation panel can be suppressed.
- the heat insulating material 33 can be disposed close to the inner surface S8 side, as shown in FIG. 3B, the heat insulating material 33 whose length in the x-axis direction is larger than that of the outer surface S7 can be disposed. Thereby, the heat insulation performance of the ultra-low temperature freezer 1 can be improved.
- the right connection surface S10 is preferably formed between the right side surface S6 and the right end A1 in a plan view from the y-axis direction.
- the length of the right connection surface S10 in the z-axis direction is, for example, about 85 mm.
- the upper end position and the lower end position of the right connection surface S10 are the positions of the handle and the lock mechanism provided in the ultra-low temperature freezer of the same model or another model (hereinafter referred to as other ultra-low temperature freezer) (that is, the upper end and the lower end in the vertical direction). )). More specifically, it is preferable that the upper end position and the lower end position of the right connection surface S10 are designed to be substantially the same as the upper end position and the lower end position of the handle and lock mechanism of the other cryogenic freezer. In this case, outside the range of the right connection surface S10, for example, the outer surface S7 and the right side surface S6 are substantially orthogonal.
- connection surface S9 has a shape symmetrical to the right connection surface S10 in FIG. 5 with respect to the above-described longitudinal center plane.
- ultra-low temperature freezers are sometimes used in research institutions. Therefore, unlike home refrigerators, a plurality of ultra-low temperature freezers may be arranged side by side in the same indoor space. When replacing one of them with another cryogenic freezer, it is usually considered that many users do not want to move the remaining cryogenic freezer. In this case, the installation space for the ultra-low temperature freezer is limited. However, since the ultra-low temperature freezer 1 is oriented side by side as described above, it is very suitable for replacement as described above.
- the right connection surface S10 is a flat surface.
- the right connection surface S10 may be a concave surface as shown in FIG.
- this concave surface is a set of only points located on the inner surface S8 side from the virtual plane connecting the right end portion of the outer surface S7 and the front end portion of the right side surface S6 in plan view from the z-axis direction.
- the concave surface may be a curved surface or a set of a plurality of flat surfaces.
- connection surface S9 has a shape symmetrical to the right connection surface S10 in FIG. 5 with respect to the above-described longitudinal center plane.
- the ultra-low temperature freezer 1 of the above-described embodiment and each modification may be reversed left and right.
- the front left corner and the front right corner of the machine room 4 are configured in substantially the same shape as the left connection surface S9 and the right connection surface S10 when viewed in plan from the z-axis direction. It doesn't matter.
- the suction port for the dual refrigeration cycle may be provided on the front surface of the machine room 4, the shape of at least one of the left connection surface S9 and the right connection surface S10 is determined in consideration of the size of the suction port. It is preferable.
- the ultra-low temperature freezer according to the present invention can quickly return the temperature of the accommodation space, and is suitable for an ultra-low temperature freezer or the like.
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Refrigerator Housings (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
以下、上記図面を参照して、本開示の一実施形態に係る超低温フリーザ1について詳説する。
≪1-1.定義≫
図1,図2において、x軸は、超低温フリーザ1の横方向を示し、より具体的には、ユーザが超低温フリーザ1と正対した時に左側から右側に向かう方向を示す。y軸は、超低温フリーザ1の前後方向を示し、より具体的には、上記正対時に奥側から手前側に向かう方向(即ち、前方向)を示す。また、z軸は、超低温フリーザ1の上下方向を示し、より具体的は、超低温フリーザ1の設置面(略水平面)から鉛直上方に向かう方向(即ち、鉛直上方向)を示す。
超低温フリーザ1は、図1,図2に示すよう、基本的には、筐体2と、外扉3と、機械室4と、を備えている。なお、図1では、後述の断熱材23,33のように外部から視認出来ない構成を破線で示している。
筐体2の外表面は、図3A,図3Bに示すように、筐体側左側面S1と、筐体側右側面S2と、背面S3と、筐体側周縁S4と、を含む。外表面は、他にも、上下方向に互いに対向する天面と底面を含むが、これら天面および底面は、本開示の要部ではないため、図3A,図3Bには示されていない。
従来の冷凍装置(即ち特許文献1の冷凍装置)では、筐体側右側面に複数のヒンジが取り付けられて、扉が筐体に対して開閉自在になっている。そのため、扉の回転中心は実質的に、冷凍装置の右側面上に配置される。また、扉の右前方にある角(換言すると、扉の外面と側面とがなす角)は実質的に90°となっている。それゆえ、冷凍装置の右側面が壁に沿うように設置された場合、扉を開けた時、扉の角が壁と接触し易くなる。
次に、図5を参照して、上記実施形態の超低温フリーザ1の第一変形例について説明する。
≪2-1.第一変形例の構成≫
上記実施形態では、外扉3の上端から下端までの全範囲にわたって右接続面S10が設けられていた。しかし、これに限らず、右接続面S10は、図5に示すように、外扉3の上端から下端までの一部の範囲に設けられても構わない。この場合、右接続面S10の上端位置および下端位置は、同一機種または他機種の超低温フリーザ(以下、他の超低温フリーザという)に備わるハンドルおよびロック機構の設置場所(即ち、鉛直方向における上端および下端の位置)を考慮して定められる。より具体的には、右接続面S10の上端位置および下端位置は、他の超低温フリーザのハンドルおよびロック機構の上端位置および下端位置と実質同一に設計されることが好ましい。なお、この場合、右接続面S10の範囲外では、例えば、外面S7と右側面S6とが略直交する。
第一変形例によれば、超低温フリーザ1と、他の超低温フリーザとを横並びに配置した場合に、右接続面S10が設けられることにより、超低温フリーザ1の外扉3を開けた時、他の超低温フリーザに備わるハンドルまたはロック機構と外扉3が接触し難くなる。
次に、図6を参照して、上記実施形態の超低温フリーザ1の第二変形例について説明する。
≪3-1.第二変形例の構成≫
上記実施形態では、右接続面S10は平坦面であった。しかし、これに代えて、右接続面S10は、図6に示すように、凹面であっても構わない。但し、この凹面は、z軸方向からの平面視で、外面S7の右端部と右側面S6の前端部とを接続する仮想平面よりも内面S8側に位置する点のみの集合である。なお、凹面は、曲面であっても良いし、複数の平坦面の集合であっても良い。
第二変形例もまた1-4欄で説明したものと同様の作用および効果を奏する。
なお、上記実施形態および各変形例の超低温フリーザ1を左右反転させても構わない。
また、超低温フリーザ1のデザイン性を考慮して、機械室4の前方左角および前方右角が、z軸方向から平面視した時に、左接続面S9および右接続面S10とほぼ同じ形状に構成されても構わない。機械室4の前面には、二元冷凍サイクル用の吸込み口が設けられることがあるため、左接続面S9および右接続面S10の少なくとも一方の形状は、吸込み口のサイズを考慮して定められることが好ましい。
2 筐体
S1 筐体側左側面
S2 筐体側右側面
S3 背面
S4 筐体側周縁
A 収容スペース
3 外扉
S5 扉側左側面
S6 扉側右側面
S7 外面
S8 内面
S9 左接続面
S10 右接続面
34 ヒンジ
341 第一ヒンジ片
342 第二ヒンジ片
343 回転軸
Claims (5)
- 第一側面と、前記第一側面と横方向において対向する第二側面とを有する外装体と、前記外装体の内側に設けられ前方向に向かって開口する収容スペースが形成された内装体と、前記外装体と前記内装体との間に設けられ真空断熱パネルからなる断熱材と、前記収納スペースを取り囲むように前記外装体と前記内装体との間に配置された蒸発器と、前記断熱材と前記内装体の間に設けられたポリウレタンと、を含む筐体と、
閉じたときに前記収納スペースの開口を塞ぐ少なくとも一枚の内扉と、
鉛直方向に延在する回転軸と、前記回転軸まわりに相対回動可能な第一ヒンジ片および第二ヒンジ片と、を含み、前記第一ヒンジ片が前記第二側面に取り付けられるヒンジと、
前記回転軸まわりに回動することで開閉する外扉であって、第三側面と、前記第三側面と対向しかつ前記第二ヒンジ片が取り付けられる第四側面と、を有する外扉と、を備え、
前記外扉は、
閉じた時に前記収容スペースを塞ぐ内面および前記内面に対して前記前方向に設けられた外面と、前記内面側に設けられた真空断熱パネルからなる断熱材と、前記断熱材と前記外面の間に設けられたポリウレタンと、を含み、
前記外面における前記横方向の端部と、前記第四側面における前記前方向の端部とを接続する平坦面または凹面であって、前記外面における前記横方向の端部が前記第四側面における前記前方向の端部よりも前方にある接続面と、をさらに有し、
前記凹面は、前記外面における前記横方向の端部と、前記第四側面における前記前方向の端部とを接続する仮想平面よりも前記内面側に位置する点のみから構成される、超低温フリーザ。 - 前記前方向からの平面視で、前記横方向における長さが、前記外扉の外面の横方向における長さよりも大きな前記外扉の前記真空断熱パネルを配置した、請求項1に記載の超低温フリーザ。
- 前記前方向からの平面視で、前記外面における前記横方向の端部は、前記収容スペースの前記横方向への端部と重なっている、請求項1または2に記載の超低温フリーザ。
- 前記接続面は、前記外扉における前記鉛直方向の上端部から下端部にわたって、前記外面における前記横方向の端部と、前記第四側面における前記前方向の端部とを接続する、請求項1~3のいずれかに記載の超低温フリーザ。
- 前記外扉の開閉時にユーザにより把持され、前記第三側面に取り付けられるハンドルと、
前記外扉が閉じた時に前記外扉を前記筐体に固定し、前記第一側面および前記第三側面に取り付けられたロック機構と、をさらに備え、
前記接続面は、前記外扉における前記鉛直方向の上端部から下端部までの一部の範囲において、前記外面における前記横方向の端部と、前記第四側面における前記前方向の端部とを接続し、
前記一部の範囲は、前記ハンドルおよび/または前記ロック機構の鉛直方向への位置に基づき定められる、請求項1~3のいずれかに記載の超低温フリーザ。
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