JP5247316B2 - Cold storage - Google Patents

Description

  The present invention relates to a cold storage.

2. Description of the Related Art In a low-temperature storage that stores a storage object such as a frozen article, a heat insulating door that includes a vacuum heat insulating panel and a foam heat insulating material inside the heat insulating door and has improved heat insulating properties is known. Specifically, two vacuum heat insulation panels of approximately the same size are attached to the inner surface of the outer plate of the heat insulation door on the upper side and the lower side. Further, the portion excluding the vacuum heat insulating panel between the outer plate and the inner plate of the heat insulating door is filled with a foam heat insulating material.
JP-A-10-300330

  By the way, when air is cooled, the density of the air increases. Therefore, the temperature of the lower air can be lower than the temperature of the upper air in the cold storage. In the case of the above low-temperature storage, since substantially the same vacuum heat insulation panels are pasted on the upper side and the lower side of the heat insulation door, the heat insulation effect on the lower side of the heat insulation door with respect to the inside is the heat insulation on the upper side of the heat insulation door with respect to the inside. It may be insufficient compared to the effect.

  Moreover, the inside of the low-temperature storage is cooled by a refrigeration apparatus. The cooling temperature inside the refrigerator by the refrigeration apparatus is adjusted through operation of a control panel provided in the low temperature storage. Since it is necessary to ensure good operability, the control panel is desirably provided in front of the low temperature storage. Therefore, a case where the control panel is provided on the outer plate of the heat insulating door is considered. In this case, the wiring that electrically connects the control panel and the refrigeration apparatus needs to pass through the inside of the heat insulating door, and further, it is necessary to avoid a decrease in the heat insulating effect of the vacuum heat insulating panel. For this reason, the control panel is attached to the center of the heat insulating door in the vertical direction while avoiding the vacuum heat insulating panel, but there is a problem in terms of operability.

The main invention for solving the above-mentioned problems is a low-temperature storage, which has an inner box that accommodates articles and an outer box that covers the inner box, and that has an opening in front of the inner box and the outer box. And a heat insulating door that has an inner plate and an outer plate having a through hole at a position above the middle in the vertical direction , pivots about one end side in the left-right direction, and opens and closes the opening, and the inside of the inner box A control unit that includes a refrigeration apparatus that cools the refrigeration apparatus and a wiring that is connected to the refrigeration apparatus through the through-hole, is fixed to the outer plate so as to cover the through-hole, and is operated to operate the refrigeration apparatus A panel, a first vacuum heat insulation panel affixed to the inner surface of the outer plate above the through hole, and a second vacuum affixed to the inner surface of the outer plate below the through hole and larger than the first vacuum heat insulation panel. Between the vacuum insulation panel and the inner and outer plates That said a first foam insulation filling the first and portion excluding the second vacuum insulation panel, wherein the wire, the thermal insulation between said first vacuum insulation panel and the second vacuum insulation panels It is arranged so as to extend toward the end surface on the rotation center side of the door, and extends downward between the end surface on the rotation center side of the heat insulation door and the second vacuum heat insulation panel. Be placed.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to improve the heat insulation efficiency of the heat insulation door with respect to the inside of a low temperature store, and the operativity of a control panel.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 3, the structural example of the low-temperature storage 1 which concerns on this embodiment is demonstrated. FIG. 1 is a front view of the low-temperature storage 1. FIG. 2 is a side view of the low-temperature storage 1 shown in FIG. 1 when viewed from the right end side in the −X direction in FIG. 1. FIG. 3 is a cross-sectional view of the low-temperature storage 1 shown in FIG. 1 when viewed in the direction of the arrow A-A ′ in FIG. 1. 1 to 3, the X axis is the left-right direction with respect to the low temperature storage 1, the Y axis is the front-rear direction with respect to the low temperature storage 1, and the Z axis is the vertical direction with respect to the low temperature storage 1.

  The low-temperature storage 1 includes a heat insulating housing 2 having an opening on the front surface (−Y direction), a heat insulating outer door 3 (heat insulating door) that opens or closes the opening of the heat insulating housing 2, and a lower side of the heat insulating housing 2 ( Machine room 4 provided in the −Z direction).

  The machine room 4 includes a first refrigerant circuit in which a first compressor, a first condenser, a first pressure reducing device, and a first evaporator are connected in an annular manner through a refrigerant pipe, a second compressor, and a second condenser. And an evaporator of a refrigeration apparatus (both not shown) comprising a second refrigerant circuit and a second refrigerant circuit that are connected to each other in an annular manner through a refrigerant pipe. Except for the configuration. The two pipes constituting the evaporators of the first and second refrigerant circuits are mutually connected along the both side surfaces and the back surface from the top surface on the outside of the inner box 23 to be described later that constitutes the heat insulating casing 2. It is attached to the wall surface while meandering so as not to overlap (not shown). The inner side of the inner box 23 is inside the cold storage 1. When the refrigeration apparatus is operated, the refrigerant circulates through the refrigerant circuit through the refrigerant pipe. Thereby, the air in the warehouse of the low temperature storage 1 is heat-exchanged with said pipe, and the inside of the warehouse is cooled.

  Under the heat insulating outer door 3 on the side surface at the front right end (−X direction) of the machine room 4, a recess 41 having a predetermined length is provided from the upper end of the side surface to the lower side. Further, a through hole 42 is provided inside the recess 41. The through hole 42 is for passing the wiring 33 from the refrigeration apparatus to the outside of the machine room 4. The wiring 33 electrically connects the refrigeration apparatus and a control panel 32 described later, and one end is connected to the refrigeration apparatus and the other end is connected to the control panel 32. Specifically, one end of the wiring 33 is connected to a compressor constituting the refrigeration apparatus, a fan motor (not shown) that radiates heat from the condenser, and the like. The depression 41 forms a space necessary for the wiring 33 to pass between the through hole 42 and a later-described through hole 37 provided on the bottom surface of the heat insulating outer door 3.

  A hinge 5 is provided on the side surfaces of the front right end of the heat insulating housing 2 and the heat insulating outer door 3. Through the hinge 5, the heat insulating outer door 3 rotates around the front right end of the heat insulating housing 2.

  A handle 6 is provided on the front left end (X direction) of the heat insulating housing 2 and the heat insulating outer door 3. The handle 6 is operated when the opening of the heat insulating casing 2 is opened or closed by the heat insulating outer door 3. Further, the handle 6 is provided with a lock mechanism (not shown) that can fix the state where the heat insulating outer door 3 closes the opening of the heat insulating housing 2.

  A control panel 32 is provided on the outer surface of a later-described outer plate 35 constituting the heat insulating outer door 3. The control panel 32 is for performing an operation for operating the refrigeration apparatus. For example, the operation state of the compressor of the refrigeration apparatus is controlled by the above operation, and the cooling temperature or the like in the cold storage 1 can be adjusted. The control panel 32 includes a keyboard 32a that is an operation input device and a liquid crystal display 32b that is a display device. The above operation is performed by the keyboard 32a. The liquid crystal display 32b displays the set temperature, the internal temperature, the operating status of each of the first and second refrigerant circuits, the operating status of the keyboard 32a, and the like. Since the control panel 32 is difficult to operate at a low position, in the present embodiment, the control panel 32 is provided above the center in the height direction of the heat insulating outer door 3 to improve operability.

  The heat insulating housing 2 includes, for example, a metal outer box 22 and an inner box 23, vacuum heat insulating panels 21a, 21b, 21c, 21d, 21e, 21f (third vacuum heat insulating panel), and a foam heat insulating material 8b (second foaming). Heat insulation). The outer box 22 and the inner box 23 have an opening on the front surface, and the outer box 22 covers the inner box 23. The vacuum heat insulating panels 21 a to 21 f and the foam heat insulating material 8 b are provided between the outer box 22 and the inner box 23 in order to enhance the heat insulating effect on the inside of the heat insulating housing 2.

  The vacuum heat insulating panels 21a to 21f are formed of a bag-shaped film and a core material filled in the film, and are exhausted so that the space inside the film secured by the core material is in a vacuum state. It is a thing. The core material is made of, for example, glass wool that does not generate gas. The film is made of, for example, aluminum that prevents gas permeation.

  The vacuum heat insulation panels 21 a to 21 f are attached to the wall surface of the outer box 22 between the outer box 22 and the inner box 23. Thereby, the vacuum heat insulation panels 21a to 21f are kept away from the inner box 23 and the above-mentioned pipes between the outer box 22 and the inner box 23, and are prevented from being cooled below the durable temperature. Specifically, on the side surface of the front left end of the outer box 22, a vacuum heat insulation panel 21a is attached to the upper side (Z direction), and a vacuum heat insulation panel 21b is attached to the lower side. On the side of the front right end of the outer box 22, a vacuum heat insulation panel 21c is attached to the upper side, and a vacuum heat insulation panel 21d is attached to the lower side. A vacuum heat insulating panel 21 e is attached to the top surface of the outer box 22. A vacuum heat insulating panel 21 f is attached to the bottom surface of the outer box 22. The vacuum heat insulation panels 21a to 21d have substantially the same size.

  The foam heat insulating material 8b is filled in a portion excluding the pipe and the vacuum heat insulating panels 21a to 21f between the outer box 22 and the inner box 23. In that case, in this embodiment, the thickness of the foam heat insulating material 8b in the part where the vacuum heat insulation panels 21a to 21f are not attached between the outer box 22 and the inner box 23 is the thickness of the vacuum heat insulation panels 21a to 21f. More than twice. For example, the foam heat insulating material 8 b is filled after the vacuum heat insulating panels 21 a to 21 f are attached to the wall surface of the outer box 22. Thus, when the foam heat insulating material 8b is filled, the foam heat insulating material 8b presses the vacuum heat insulating panels 21a to 21f. Furthermore, when the foam heat insulating material 8b is made of a foamed polyurethane resin, it is adhered to the wall surfaces of the outer box 22 and the inner box 23 and the vacuum heat insulating panels 21a to 21f when the polyurethane resin is foamed. Therefore, the vacuum heat insulation panels 21 a to 21 f are securely fixed to the wall surface of the outer box 22.

  The inner box 23 is provided with an inner door 7 that rotates around the front end of the front right side surface of the inner box 23 to open or close the opening of the inner box 23. The inner door 7 is made of, for example, resin, and is for increasing the heat insulation effect with respect to the interior of the low temperature storage 1.

  The heat insulating outer door 3 includes, for example, a metal outer plate 35 and an inner plate 36, a vacuum heat insulating panel 31a (first vacuum heat insulating panel), 31b (second vacuum heat insulating panel), and a foam heat insulating material 8a (first foam heat insulating material). Material). The heat insulating outer door 3 is configured by being surrounded by an outer plate 35 and an inner plate 36. The outer plate 35 constitutes a wall on the outer side of the heat insulating outer door 3. The inner plate 36 constitutes the inner wall of the heat insulating outer door 3. The vacuum heat insulating panels 31 a and 31 b and the foam heat insulating material 8 a are provided inside the heat insulating outer door 3 in order to enhance the heat insulating effect of the heat insulating outer door 3 with respect to the interior.

  The vacuum heat insulation panels 31a and 31b are comprised from the film and the core material similarly to the vacuum heat insulation panels 21a-21f. The vacuum heat insulating panels 31 a and 31 b are attached to the inner surface of the outer plate 35. Thereby, the vacuum heat insulation panels 31a and 31b are kept away from the inside of the inside of the heat insulation outer door 3 and are prevented from being cooled below the durable temperature. Specifically, the vacuum heat insulation panel 31a is attached to the upper side of the outer plate 35, and the vacuum heat insulation panel 31b is attached to the lower side. The vacuum heat insulating panels 31 a and 31 b are quadrangular, and the left and right widths are longer than the left and right widths of the opening of the inner box 23. Further, the upper vacuum heat insulation panel 31a has a shorter vertical width than the lower vacuum heat insulation panel 31b.

  A through hole 37 is provided on the recess 41 of the outer plate 35 constituting the bottom surface of the heat insulating outer door 3. The through hole 37 is for passing the wiring 33 through the inside of the heat insulating outer door 3.

  A through hole 34 is provided in the outer plate 35 at the position indicated by A-A 'in FIG. The through hole 34 is for connecting the control panel 32 and the wiring 33 passing through the inside of the heat insulating outer door 3. Therefore, the control panel 32 is fixed to the outer plate 35 with screws or the like so as to cover the through hole 34. Then, on the back side (Y direction) of the control panel 32, the wiring 33 and the control panel 32 are connected via the through hole 34.

  AA ′ in FIG. 1 is a gap between the vacuum heat insulation panel 31a and the vacuum heat insulation panel 31b, which is approximately a distance C from the substantially middle (BB ′ in FIG. 1) in the vertical direction of the heat insulation outer door 3. Indicates the position. Therefore, the through-hole 34 is provided avoiding the vacuum heat insulation panels 31a and 31b, and it is prevented that the sealing property of the film which comprises the vacuum heat insulation panels 31a and 31b is impaired. That is, the heat insulation effect of the vacuum heat insulation panels 31a and 31b is prevented from being lowered.

  The foam heat insulating material 8 a is filled in a portion excluding the vacuum heat insulating panels 31 a and 31 b and the wiring 33 inside the heat insulating outer door 3. At this time, in the present embodiment, the thickness of the foam heat insulating material 8a in the portion where the vacuum heat insulating panels 31a and 31b are not attached between the outer plate 35 and the inner plate 36 is the thickness of the vacuum heat insulating panels 31a and 31b. More than twice. For example, the foam heat insulating material 8 a is filled in a state where the vacuum heat insulating panels 31 a and 31 b are attached to the outer plate 35 and the wiring 33 is passed through the inside of the heat insulating outer door 3. As a result, as in the case of the foam heat insulating material 8b, the vacuum heat insulating panels 31a and 31b are securely fixed to the outer plate 35. Furthermore, the wiring 33 is fixed inside the heat insulating outer door 3 at a place where the foam heat insulating material 8a is filled.

  In addition, the wiring 33 is arrange | positioned so that it may not contact the vacuum heat insulation panels 31a and 31b inside the heat insulation outer door 3. FIG. Thereby, damage to the film and the wiring 33 which comprise the vacuum heat insulation panels 31a and 31b is prevented. Moreover, the wiring 33 is arrange | positioned in the front side inside the heat insulation outer door 3 avoiding between the vacuum heat insulation panels 31a and 31b and the inside of a store | warehouse | chamber. As a result, the wiring 33 is kept away from the interior of the heat insulating outer door 3 and is prevented from being cooled below the durable temperature.

  Hereinafter, referring to FIG. 4, a state in which the wiring 33 in the low temperature storage 1 is passed through the inside of the heat insulating outer door 3 from the control panel 32 in the above-described arrangement and introduced into the machine room 4 will be specifically described. .

  FIG. 4 is a perspective view showing the heat insulating outer door 3, the machine room 4, and the wiring 33 of the low temperature storage 1. For convenience of explanation, in the heat insulating outer door 3 of FIG. 4, a part of the outer plate 35 and the inner plate 36 and the foam heat insulating material 8 a are omitted. Further, in the machine room 4 of FIG. 4, portions other than the portion including the recess 41 and the through hole 42 are omitted. Further, in the wiring 33 of FIG. 4, the one end side inside the machine room 4 is omitted. In FIG. 4, the X axis is the left-right direction with respect to the low temperature storage 1, the Y axis is the front-rear direction with respect to the low temperature storage 1, and the Z axis is the vertical direction with respect to the low temperature storage 1.

  The wiring 33 is introduced into the heat insulating outer door 3 from the control panel 32 through the through hole 34. The wiring 33 is arranged so that the gap between the vacuum heat insulating panels 31 a and 31 b is directed from the through hole 34 toward the front right side of the heat insulating outer door 3. Further, the wiring 33 is arranged so as to pass through the space between the front right end side surface of the heat insulating outer door 3 and the front right end side surface of the vacuum heat insulating panel 31 b toward the through hole 37. The wiring 33 is led out of the heat insulating outer door 3 through the through hole 37 and introduced into the machine room 4 through the through hole 42.

  From the above, in the low temperature storage 1 according to the present embodiment, the vacuum heat insulation panel 31b provided on the lower side of the heat insulation outer door 3 is more than the vacuum heat insulation panel 31a provided on the upper side of the heat insulation outer door 3. large. Therefore, in the low temperature storage 1, even when the temperature of the air on the lower side in the storage is lower than the temperature of the air on the upper side in the storage, the heat insulating outer door 3 is used for the upper and lower sides in the storage. A good heat insulating effect can be obtained.

  Moreover, in the heat insulation outer door 3 of the low temperature storage 1 which concerns on this embodiment, A-A 'of FIG. 1 is on the upper side about the distance C rather than B-B' of FIG. Thereby, the control panel 32 can be arrange | positioned upwards rather than the center of the height direction of the heat insulation outer door 3, and favorable operativity is securable.

  In addition, the said Example is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  For example, in the present embodiment, the vacuum heat insulating panels 31a and 31b are rectangular, but the present invention is not limited to this. For example, the vacuum heat insulating panels 31a and 31b may have a shape other than a square so that the wiring 33 can be easily arranged inside the heat insulating outer door 3.

  Moreover, in this embodiment, although the position where the through-hole 34 is provided was made into the substantially middle of the left-right direction of the heat insulation outer door 3, it is not restricted to this. For example, the position where the through hole 34 is provided may be set to the front right side of the heat insulating outer door 3 in the right and left direction substantially in the middle. Thereby, the length of the wiring 33 can be shortened.

  Moreover, in this embodiment, although the vacuum heat insulation panels 31a and 31b were affixed on the outer plate 35, and the wiring 33 was passed through the inside of the heat insulation outer door 3, it was set as the structure filled with the foam heat insulating material 8a. However, it is not limited to this. For example, the foam heat insulating material 8a may be filled in the heat insulating outer door 3 after being molded according to the shapes of the vacuum heat insulating panels 31a and 31b, the wiring 33, and the like. Similarly, the foam heat insulating material 8b may be filled in the heat insulating casing 2 after being molded according to the shape of the vacuum heat insulating panels 21a to 21f and the like.

It is a front view of the low-temperature storage 1 which concerns on this embodiment. It is a side view at the time of seeing the low temperature storage 1 of FIG. 1 from the right end side of the -X direction in FIG. It is sectional drawing at the time of seeing the low-temperature storage 1 of FIG. 1 in the direction of the arrow of A-A 'of FIG. It is the perspective view shown about the heat insulation outer door 3, the machine room 4, and the wiring 33 of the low-temperature storage.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low temperature storage 2 Heat insulation housing 3 Heat insulation outer door 8a, 8b Foam heat insulation 21a-21f, 31a, 31b Vacuum heat insulation panel 22 Outer box 23 Inner box 32 Control panel 33 Wiring 34 Through-hole 35 Outer plate 36 Inner plate 32b Liquid crystal display

Claims (4)

A heat-insulating housing having an inner box for storing articles and an outer box covering the inner box, and having an opening in front of the inner box and the outer box;
A heat insulating door having an inner plate and an outer plate having a through hole at a position above the middle in the vertical direction , rotating around one end side in the horizontal direction to open and close the opening;
A refrigeration apparatus for cooling the inside of the inner box;
A control panel having a wiring connected to the refrigeration apparatus through the through hole, fixed to the outer plate so as to cover the through hole, and an operation for operating the refrigeration apparatus;
A first vacuum heat insulation panel affixed to the inner surface of the outer plate above the through hole;
A second vacuum thermal insulation panel that is affixed to the inner surface of the outer plate below the through hole, and is larger than the first vacuum thermal insulation panel;
A first foam heat insulating material filled in a portion excluding the first and second vacuum heat insulating panels between the inner plate and the outer plate;
Equipped with a,
The wiring is arranged so as to extend between the first vacuum heat insulation panel and the second vacuum heat insulation panel toward the end surface on the rotation center side of the heat insulation door, and the rotation center of the heat insulation door The low-temperature storage characterized by arrange | positioning so that it may extend toward the downward side between the side end surface and the said 2nd vacuum heat insulation panel . The refrigeration apparatus is composed of substantially the same first refrigerant circuit and second refrigerant circuit, and the pipes constituting the evaporators of the first and second refrigerant circuits do not overlap each other on the outer surface of the inner box. Meander and paste
A third vacuum insulation panel affixed to the inner surface of the outer box;
A second foam heat insulating material filled in a portion excluding the pipe and the third vacuum heat insulating panel between the inner box and the outer box;
The cold storage according to claim 1, further comprising:   3. The low-temperature storage according to claim 2, wherein the control panel includes a display device, and the display device displays an operation status of the first and second refrigerant circuits constituting the refrigeration apparatus. .   A third vacuum thermal insulation panel affixed to the upper side of the middle in the vertical direction and a fourth vacuum thermal insulation panel affixed to the lower side on the inner surfaces of the side surfaces on both sides in the left-right direction of the outer box;
  The said 3rd vacuum heat insulation panel and the said 4th vacuum heat insulation panel are substantially the same magnitude | sizes, and are larger than the said 1st vacuum heat insulation panel and smaller than the said 2nd vacuum heat insulation panel, The 1st aspect is characterized by the above-mentioned. Low temperature storage as described.

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