JP5441517B2 - Cooling storage - Google Patents

Description

The present invention relates to a structure of a cold storage warehouse.

  Conventionally, as a type of cooler room mounted on the upper surface of a refrigerator, a synthetic resin base is mounted so as to cover the opening formed on the upper surface of the storage body in order to simplify the structure and reduce the weight. On the other hand, a styrofoam is formed by forming a suction port and a blower outlet on both sides of the placement part of the cooler and sandwiching the placement part, and covering the placed cooler and the suction port and the blower outlet. The thing of the structure which adhered the heat insulation cover made from foamed resin etc. is proposed (for example, refer patent document 1).

JP 2004-251608 A

However, in the above-mentioned conventional structure, the cooler heat of the cooler is easily transmitted from the mounting part to the outer periphery of the base that is exposed outside and exposed to the outside, leading to cold air leakage. There was a problem that condensation occurred at the periphery.
The present invention has been completed based on the above circumstances, and an object thereof is to suppress cold air leakage at the peripheral edge of the base.

The present invention provides a cooling chamber in which a cooler chamber containing a cooler is provided on the upper surface of the storage body, and the interior air is circulated and circulated through the cooler chamber to cool the interior of the storage. It is a cooler chamber, and is mounted so as to cover an opening formed on the upper surface of the storage body, and a suction port and an outlet on both sides sandwiching the mounting unit and the mounting unit on which the cooler is mounted And a base made of a synthetic resin provided on the upper surface of the base, and a heat insulating cover with an open bottom surface that is attached to the upper surface of the base, and the base is formed so as to surround the mounting portion, the suction port, and the air outlet. And a heat insulating material fitted in the groove.
The cooler heat of the cooler is transmitted from the mounting part to the peripheral part of the base, which is blocked by the heat insulating material fitted in the groove part, that is, the cooler heat is hardly transmitted. For this reason, it is possible to prevent the leakage of cold air to the outside and prevent the cooling performance from deteriorating, and also prevent condensation on the peripheral edge of the base.

The following configuration may also be used.
(1) The bottom surface of the groove formed in the base is opened, and the heat insulating material filled in the groove is in contact with the mouth of the opening on the upper surface of the storage body. Heat transfer from the inside to the outside of the groove is further blocked.
(2) The groove is provided with a plurality of ribs connecting the inner and outer side surfaces at intervals, and the heat insulating material fitted into the groove is formed with an insertion groove into which the rib is inserted. Yes. The structural enhancement is achieved while keeping the heat transfer from the inside to the outside of the groove portion small. Further, the heat insulating material is firmly held in the groove portion by the fitting between the rib and the fitting groove.

(3) The open end of the peripheral wall of the heat insulating cover is fitted into the groove portion of the base. Just by fitting the peripheral wall of the open end of the heat insulating cover into the groove portion of the base, a heat insulating layer is formed around the mounting portion and the like, and the cooler chamber is also configured by itself.
(4) A predetermined height region on the open end side of the peripheral wall of the heat insulating cover is divided, and a coupling portion that is unevenly fitted to each other is provided on the divided surface, and the divided heat insulating material is fitted in the groove portion in advance. From the worn state, the dividing surface of the peripheral wall of the heat insulating cover is aligned with and combined with the dividing surface of the heat insulating material.
Compared with the case where the peripheral wall of the open end of the heat insulating cover is pushed to the bottom of the groove part, since the dividing surface of the peripheral wall of the open end of the heat insulating cover only needs to be combined with the dividing surface of the heat insulating material raised to the upper position of the groove part. This makes it easier to attach and detach the insulation cover.

  According to the present invention, it is possible to suppress the leakage of cold air at the peripheral edge of the base as much as possible.

Front view of a low-temperature storage according to Embodiment 1 of the present invention Side view Plan view of unit base IV-IV sectional view of FIG. Same perspective view Perspective view of insulation cover Plan view with refrigeration circuit mounted on unit base Same perspective view Exploded sectional view of the cooler room installation Sectional view with cooler chamber formed The exploded sectional view in the installation part of the cooler room concerning Embodiment 2 Sectional view with the cooler chamber formed

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a low temperature storage for storing grains and the like is illustrated.
1 and 2, reference numeral 10 denotes a storage body, which is formed by a vertically long heat insulating box body having a front opening, and has an interior serving as a storage chamber 11, and is supported by legs 12 disposed on the bottom surface. At the same time, a heat insulating door 13 is swingably opened and closed at the front entrance.
A cooling unit 15 is installed on the upper surface of the storage body 10. As shown in FIGS. 8 and 10, the cooling unit 15 is provided with a heat-insulating cooler chamber 30 in which a cooler 50 is accommodated on one side on the unit base 20. The refrigeration apparatus 80 is installed on the side, and the upper part thereof is covered with a case 95.

  The unit base 20 is made of synthetic resin such as ABS resin, and as shown in FIGS. 3 to 5, is formed in a substantially shallow dish shape having a slightly long planar rectangle in the depth direction of the storage body 10. Approximately half of the back side (right side in FIG. 4) is a first region 21A for providing the cooler chamber 30 and the like, and the remaining front side is a second region 21B for installing the refrigeration apparatus 80 and the like. From the lower ends of the front and rear peripheral walls, a mounting plate 23 formed with screw insertion holes 23A is formed so as to be screwed to the upper surface of the storage body 10.

On the first region 21A side, a small storage chamber 25 is formed at the left end when viewed from the front, and a cooler chamber having a slightly longer rectangular shape in the left-right direction (lateral direction) in plan view in the remaining right region. Thirty base portions 31 are formed.
The storage chamber 25 has a deep dish shape isolated from the evaporating dish 70, which will be described later, and can accommodate wiring, connectors, and the like together. Even when the case 95 is removed, the wiring is not scattered and gets wet with water. There is no such thing.
An outer wall 32 is formed on the entire periphery of the periphery of the base 31 of the cooling chamber, and the inside of the outer wall 32 has a horizontally long rectangle that is slightly smaller than the outer wall 32 in plan view. An inner wall 33 that is taller than the outer wall 32 is formed substantially concentrically at an interval. The outer wall 32 and the inner wall 33 are connected to each other by a thick connecting wall 35 having the same height as the inner wall 33 at the center in the width direction of the front wall surface. Thereby, between the outer wall 32 and the inner wall 33, a rectangular ring-shaped groove 37 opened on both upper and lower surfaces for fitting a lower end portion of a heat insulating cover 55 described later is formed. A substantially semicircular concave surface 35A that allows the refrigerant pipe 86 and the like to escape is formed on the upper surface of the connecting wall 35.
In addition, on the bottom side of the annular groove 37, plate-like ribs 38 are formed over the inner and outer side surfaces at appropriate intervals in the circumferential direction, thereby reinforcing the shape.

As shown in FIG. 10, an opening 14 having a horizontally long rectangle is formed at a position close to the back side of the upper surface wall 10A of the storage body 10, and when the unit base 20 is attached to a normal position. The lower edge of the inner wall 33 in the base portion 31 of the cooler chamber 30 is adapted to abut on the upper edge of the opening 14 described above. In other words, the inside of the inner wall 33 and the inside of the opening 14 are aligned and communicated.
A drain pan 40 that also serves as a mounting portion such as a cooler 50 is formed in the central portion of the inner wall 33 in the lateral width direction, and a suction port 41 and an air outlet 42 are formed on the right and left sides thereof. Is formed. A louver 43 is formed at each of the suction port 41 and the air outlet 42.

As shown in FIG. 4, the drain pan 40 is formed in a plate shape having a planar square as a whole with a peripheral wall around the entire circumference. However, the bottom surface 40 </ b> B has a corner near the left front as viewed from the front. It is formed so as to incline so as to have the lowest position and a downward gradient from the surroundings toward the same position.
The evaporating dish 70 is formed in the second region 21B of the unit base 20 as will be described later, and the front wall surface of the outer wall 32 of the base portion 31 also serves as the inner wall surface 70R of the evaporating dish 70. Yes.
A drain port 45 is cut out at a position close to the left end of the peripheral wall 40F on the near side of the drain pan 40, specifically, at a position adjacent to the left side of the connecting wall 35 described above. A drainage channel 46 is formed so as to extend over the side wall surface 70R. The bottom surface of the drainage channel 46 is provided with a downward gradient following the inclination of the bottom surface 40 </ b> B of the drain pan 40.

On the bottom surface 40 </ b> B of the drain pan 40, a cooler 50 is installed in the approximately 2/3 region on the right side, and a cooling fan 51 is installed in the remaining region on the left side. The cooler 50 is supported by fitting the four corners of the lower surface to the four support bases 47 erected from the bottom surface 40B.
The cooling fan 51 is a fan motor, and is supported in a posture in which the axis is directed in the left-right direction by inserting a lower end portion into a support base 48 provided on the inner surface side of the left wall surface of the drain pan 40.

The cooler chamber 30 is formed by covering the upper surface of the base portion 31 and attaching the heat insulating cover 55. The heat insulating cover 55 is formed of a heat insulating material made of foamed resin such as polystyrene foam, and is formed in a rectangular box shape that is thick and has an opening on the lower surface, as shown in FIGS.
The lower end portion of the peripheral wall 56 of the heat insulating cover 55 is fitted almost tightly to the bottom of the annular groove 37 of the base portion 31 described above. Therefore, an escape groove 57 for allowing the connection wall 35 and the drainage channel 46 to escape is formed on the lower end surface of the peripheral wall 56 of the heat insulating cover 55. Of the top surface of the escape groove 57, a concave surface 58A having a substantially semicircular shape is formed at a position corresponding to the upper surface of the connecting wall 35, and a flat closing surface 58B is formed at a position corresponding to the upper surface of the drainage channel 46. Is formed.
On the lower end surface of the peripheral wall 56 of the heat insulating cover 55, an escape groove 60 is formed to insert and escape the rib 38 formed on the bottom side of the annular groove 37 over the entire height.
Note that the guide part 61 that covers the front and rear surfaces of the cooling fan 51 on the blowing side surface (left side surface) of the cooler 50 and the cooler 50 when the inner surface of the heat insulating cover 55 is properly attached. A pressing portion 62 and the like for pressing the upper surface of the cooling fan 51 are formed.

On the second region 21B side of the unit base 20, an evaporating dish 70 is formed over substantially the entire area. The evaporating dish 70 is a dish with an open top surface with a peripheral wall around its periphery, and is formed in a planar shape with a corner of the right front of a horizontally long rectangle missing. As shown in FIG. It is provided in a form that is slightly lifted from the bottom.
A main body 72A of the electrical box 71 is integrally formed in the missing portion. The main body 72A constitutes the three side surfaces of the bottom surface, the front surface, and the left and right side surfaces of the electrical equipment box 71, and an L-shaped lid 72B (see FIG. 8) that closes the rear surface and the upper surface of the main body portion 72A. By being attached, an electrical box 71 is formed. The bottom surface of the electrical box 71 is at a position higher than the peripheral wall of the evaporating dish 70, and a groove 73 is provided between the evaporating dish 70 and a distance is provided. Even if it overflows, it is prevented that the electrical equipment box 70 is flooded. Further, a display portion 74 is provided on the front wall of the electrical box 71, and the display portion 74 can be seen from a window hole 99 provided in the front surface of the case 95 as shown in FIG. .

Inside the evaporating dish 70, a refrigeration apparatus 80 including a compressor 81, a condenser 82 with a condenser fan 83, a dryer 84, a capillary tube 85, and the like is installed.
The compressor 81 is installed in a floating state from the bottom surface by fixing four legs provided on the lower surface to a support portion 87 arranged in a square shape in a wide area on the left side of the evaporating dish 70. Yes. In a narrow area on the right side of the evaporating dish 70, a condenser 82 is mounted on the right side, and a condenser fan 83 with the axis line in the left-right direction is mounted on the left side of the evaporating dish 70. It is installed in the form.
An overflow groove 91 is formed at the upper edge of the left side wall of the evaporating dish 70, and a handle portion 92 is formed on both the left and right sides of the evaporating dish 70.

The case 95 is a synthetic resin such as ABS resin, like the unit base 20, and is formed in a box shape with an open bottom surface that can cover the entire upper portion of the unit base 20. From the above, a mounting plate 96 in which screw insertion holes are similarly formed is formed so as to overlap the upper surface of the mounting plate 23 of the unit base 20 described above.
In addition, a cooling air intake port 97 and an exhaust port (not shown) are formed on the right side surface and the left side surface of the case 95 respectively, and the unit base 20 is provided at the lower ends of both side surfaces. A window hole 98 that allows the handle portion 92 to face the outside is cut out.

The cooling unit 15 is assembled and installed in the following procedure.
A compressor 81 and a condenser 82 are attached in an evaporating dish 70 provided in the unit base 20, and a cooler 50 is attached in the drain pan 40. From this state, as shown in FIG. 7, the compressor 81, the condenser 82, the dryer 84, the capillary tube 85, and the cooler 50 are circulated and connected by the refrigerant pipe 86, and a refrigeration circuit is configured. Among the refrigerant pipes 86, the refrigerant pipe 86 that is taken in and out of the cooler 50 is placed on the concave surface 35 </ b> A of the connection wall 35.
Next, a condenser fan 83 is attached next to the condenser 82 in the evaporating dish 70, and a cooling fan 51 is installed at the left edge in the drain pan 40.

Subsequently, a heat insulating cover 55 is attached to the base 31 provided on the unit base 20. For this purpose, the lower end portion of the peripheral wall 56 is fitted into the annular groove 37 formed in the base portion 31 with the heat insulating cover 55 in a predetermined direction. The lower end portion of the peripheral wall 56 of the heat insulating cover 55 fits the connecting wall 35 and the drainage channel 46 into the escape groove 57, and the reinforcing rib 38 provided on the bottom side of the annular groove 37 is inserted into the corresponding escape groove 60. It is pushed in while being inserted, and the pushing is stopped when the inner surface of the relief groove 60 hits the rib 38.
At this time, the lower end surface of the peripheral wall 56 of the heat insulating cover 55 slightly protrudes from the opened bottom surface of the annular groove 37. Further, the concave surface 58A on the top surface of the escape groove 57 and the concave surface 35A on the upper surface of the connecting wall 35 are combined to form a circular insertion hole, and the refrigerant pipe 86 is inserted almost tightly into the insertion hole. At the same time, the upper surface of the drainage channel 46 is closed by the closing surface 58 </ b> B of the top surface of the escape groove 57.

Further, a block-shaped heat insulating material 44 pre-formed with foamed resin such as foamed polystyrene is fitted to the lower surface side of the drain pan 40. At the same time, the L-shaped lid 72B is attached to the main body 72A of the electrical box 71.
Finally, a case 95 is put on. The case 95 is covered in a state where the front and rear mounting plates 96 overlap the mounting plate 23 of the unit base 20 so as to cover the entire upper portion of the unit base 20, and at this time, the window holes 98 on the left and right side surfaces are covered. The handle portion 92 faces. Further, the top surface of the case 95 is applied to the upper surface of the heat insulating cover 55 of the cooler chamber 30.

The cooling unit 15 assembled in this way is installed on the upper surface of the storage body 10. Prior to that, a sponge sheet (not shown) having a width comparable to the thickness of the lower end of the peripheral wall 56 of the heat insulating cover 55 is provided on the edge of the opening 14 formed on the upper surface of the storage body 10. It is pasted over.
The cooling unit 15 is lifted by placing both hands on the grips 92, and the interior of the inner wall 33 of the base 31 of the cooler chamber 30 is aligned with the opening 14 as shown in FIG. Placed on top. Then, the case 95 and the mounting plates 96, 23 of the unit base 20 are overlapped and fixed by being tightened with screws.
At this time, the heat insulating cover 55 constituting the cooler chamber 30 is pressed by the case 95, and the lower surface of the peripheral wall 56 is pressed against the mouth edge (sponge sheet) of the opening 14.

  The cooling operation is performed by driving the refrigeration apparatus 80 (the compressor 81 and the condenser fan 83) and the cooling fan 51. As shown by the arrow in FIG. The cool air is sucked into the cooler chamber 30, and cold air is generated by heat exchange while passing through the cooler 50, and the cold air is blown out from the outlet 42 to the storage chamber 11. The inside of the chamber 11 is cooled. During this time, the in-compartment temperature is detected by an in-compartment thermistor (not shown) installed in the louver 43 on the suction port 41 side, and the refrigeration apparatus 80 depends on whether the detected temperature is higher or lower than a preset temperature. The on / off of the cooling fan 51 is controlled, whereby the inside of the storage chamber 11 is maintained at a substantially set temperature.

Further, the defrosting operation is performed with an appropriate time interval. Here, by operating a switching valve provided in the refrigeration circuit, hot gas discharged from the compressor 81 is circulated and supplied to the cooler 50 through a hot gas pipe (not shown), and the cooler 50 is heated. As a result, the attached frost is melted, and the defrosted water is dripped onto the drain pan 40 disposed below. The dropped defrost water is smoothly guided to the drainage port 45 which is the lowermost part following the inclination of the bottom surface 40B, and flows down along the drainage channel 46, and then evaporates from the front side of the rear wall surface 70R. Drained inside.
When the defrost water stored in the evaporating dish 70 is returned to the cooling operation, the defrost water is forcibly evaporated by receiving heat from the compressor 81 and the condenser 82, and the outside air is sucked by the condenser fan 83 during this period. Then, the exhaust heat after cooling the condenser 82 and the compressor 81 is exhausted from the exhaust port on the left side surface of the case 95, and the outside air passes through the upper surface of the evaporating dish 70. The steam rising from the evaporating dish 70 is discharged from the exhaust port in response to the flow of outside air.

As described above, according to the present embodiment, the base 31 of the cooler chamber 30 including the evaporating dish 70, the drain pan 40 serving as the mounting portion of the cooler 50, and the like is integrated with the unit base 20 by the synthetic resin material. Since it is molded, the number of parts and assembly man-hours can be reduced, and the cleaning workability is improved.
Here, as described above, since the base 31 of the cooler chamber 30 having the drain pan 40 and the like on which the cooler 50 is placed is integrally formed with the unit base 20, the cooler 50 is cooled. In this case, an annular groove 37 is formed around the drain pan 40, the suction port 41, and the air outlet 42, and heat insulation is performed in the annular groove 37. Since the lower end portion of the peripheral wall 56 of the heat insulating cover 55 which is a material is fitted, it is blocked by the heat insulating material, and it becomes difficult for cold heat to be transmitted. Therefore, it is possible to prevent leakage of cold air to the outside and prevent the cooling performance from being deteriorated, and also prevent dew condensation on the peripheral edge of the base 31.
In particular, since the bottom surface of the annular groove 37 is opened and the lower surface of the peripheral wall 56 of the heat insulating cover 55, which is a heat insulating material, is applied to the edge of the opening 14 on the upper surface of the storage body 10, the annular groove 37 is provided. The transmission of cold heat from the inside to the outside is further effectively blocked.

A plurality of plate-like ribs 38 that connect the inner and outer side surfaces are provided at the bottom of the annular groove 37 at intervals, while the rib 38 is inserted into the lower end of the peripheral wall of the heat insulating cover 55. The groove 60 is formed. While the structural enhancement is achieved by providing the ribs 38, only the inner and outer surfaces of the annular groove 37 are connected in a small area, so that the increase in heat transfer is minimized. In addition, the peripheral wall 56 of the heat insulating cover 55 is firmly fixed in the annular groove 37, and the heat insulating cover 55 is prevented from wobbling or forming a gap due to vibration of the compressor 81 or the like. Since the rib 38 itself is a vertically oriented plate, the mold can be formed as a simple structure.
Further, only by fitting the lower end portion of the peripheral wall 56 of the heat insulating cover 55 into the annular groove 37 of the base portion 31, a heat insulating layer is formed around the mounting portion of the cooler 50, and the cooler chamber 30 is also constituted by itself. Therefore, the assembly process is simplified.

<Embodiment 2>
11 and 12 show Embodiment 2 of the present invention.
In the second embodiment, the annular groove 37 formed in the base 31 of the cooler chamber 30 provided in the unit base 20 has a shape in which the bottom plate 100 is stretched.
On the other hand, the peripheral wall 56A of the heat insulating cover 55A has a shape in which a predetermined height portion at the lower end is divided, and positioning protrusions 102 are formed on the entire periphery of the upper surface of the divided heat insulating material 101. A concave groove 103 into which the above-described protrusion 102 fits tightly is formed on the entire lower surface of the lower surface of the peripheral wall 56A of the heat insulating cover 55A that is formed by being divided.
About another structure, it is the same as that of the said Embodiment 1, Comprising: About the member and site | part which have the same function, the same code | symbol as Embodiment 1 is attached | subjected, and the overlapping description is abbreviate | omitted.

In this embodiment, the heat insulating material 101 in a divided form is mounted in advance in most of the depth portion in the annular groove 37, and then the lower end of the peripheral wall 56A of the heat insulating cover 55A is connected to the protrusion 102. It is fitted in the annular groove 37 so as to overlap the upper surface of the heat insulating material 101 while being fitted and positioned in the concave groove 103.
When the lower end of the peripheral wall 56A of the heat insulating cover 55A is fitted into the annular groove 37, the lower surface of the peripheral wall 56A may be combined with the upper surface of the heat insulating material 101 raised to the upper position of the annular groove 37. Compared with the case where the lower end portion of the heat sink is pushed down to the bottom of the annular groove 37, the heat insulating cover 55A can be easily attached and detached.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said embodiment, the case where the thing divided | segmented from the lower end part itself of the surrounding wall of a heat insulation cover itself, or the same lower end part was illustrated as a heat insulating material fitted to the annular groove of the base part of a cooler chamber. However, a completely different heat insulating material from the heat insulating cover may be fitted.
(2) In the type in which the lower end of the peripheral wall of the heat insulating cover is fitted to the annular groove exemplified in the first embodiment, a structure may be adopted in which a bottom plate is provided in the annular groove. Conversely, in the type in which the divided heat insulating material exemplified in Embodiment 2 is fitted into the annular groove, the bottom plate is removed, and the heat insulating material directly contacts the lip of the opening. Good.

(3) The assembly and installation procedure of the cooling unit exemplified in the above embodiment is merely an example. For example, the unit base is first installed on the upper surface of the storage body, and then the cooler chamber is configured with a heat insulating cover. Etc., and can be arbitrarily changed as necessary.
(4) The present invention can be similarly applied to a case where the cooler chamber is attached separately from the refrigeration apparatus, that is, a unit which is not unitized.

(5) The present invention is not limited to the low-temperature storage illustrated in the above embodiment, but can be applied to a cooler room equipped in all cooling storages such as a refrigerator, a freezer, and a quick freezer.
(6) In the structure of the electrical box forming portion, the main body portion with the top opening that is tall from the unit base side is integrally formed, while the lid portion is integrally formed on the top surface of the case, and the unit base is covered. In addition, the closed electrical component box may be configured by closing the upper surface opening of the main body with the lid.

  DESCRIPTION OF SYMBOLS 10 ... Storage body 10A ... Upper surface wall 14 ... Opening part 20 ... Unit base 30 ... Cooler room 31 ... Base part (base) 37 ... Annular groove (groove part) 38 ... Rib 40 ... Drain pan (mounting part) 41 ... Suction port 42 ... Air outlet 50 ... Cooler 51 ... Cooling fan 55 ... Heat insulation cover 55A ... Heat insulation cover 56 ... Surrounding wall (insulating material) 56A ... Surrounding wall (of heat insulation cover 55A) 60 ... Escape groove (fitting groove) DESCRIPTION OF SYMBOLS 101 ... Thermal insulation material 102 ... Projection (joint part) 103 ... Concave groove (joint part)

Claims (5)

The upper surface of the storage body is cooler compartment that houses a cooler is provided, a cooling storage cabinet in which the internal air is as above the cooler is circulated flow through the interior compartment is cooled,
The storage body of the synthetic resin of the unit base mounted over the opening formed in the upper surface is provided,
The unit base includes a first portion in which a suction port and an outlet are arranged on both sides of the mounting portion on which the cooler is mounted, and a refrigeration apparatus such as a compressor and a condenser. It is integrally formed with the second area where the equipment to be configured is installed,
A heat-insulating cover having a lower open surface is attached to the upper surface of the first region of the unit base ;
The unit base in the mounting section, the suction port and groove enclosed around the air outlet are formed,
Cold storage box, wherein a heat insulating material is fitted in the groove. The bottom surface of the groove portion formed in the base is opened, and the heat insulating material filled in the groove portion is in contact with a mouth edge of the opening portion on the upper surface of the storage body. cold storage warehouse described. A plurality of ribs connecting the inner and outer side surfaces are provided at intervals in the groove portion, and an insertion groove into which the rib is inserted is formed in the heat insulating material fitted into the groove portion. cold storage box according to claim 2, wherein. The open end of the peripheral wall of the insulating cover, cold storage box according to any one of claims 1 to 3, characterized in that it is fitted into the groove of the base. A predetermined height region on the open end side of the peripheral wall of the heat insulating cover is divided, and a coupling portion is provided on the divided surface so as to engage with each other, and the divided heat insulating material is fitted in the groove portion in advance. from the state, the cooling storage cabinet according to claim 4, wherein the dividing surface of the peripheral wall of the insulating cover is characterized in that it is coupled to aligned with the dividing plane of the insulation.

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