JP2008064339A - Showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a showcase capable of efficiently cooling commodities by preventing heat leakage while unifying an internal temperature of a commodity storing box. <P>SOLUTION: This showcase 1 comprising a case body 10 having an opening portion 11 openable and closable by a glass door 12 on its top face, and the commodity storing box 13 disposed inside of the case body 10, and capable of taking out the commodities stored in the commodity storing portion 13 from the opening portion 11 when the opening portion 11 is opened, further comprises an air guide passage R formed at an outer peripheral area of the commodity storing box 13 inside of the case body 10 in a sealed state, and a blower fan F for cooling the commodities stored in the commodity storing box 13 by distributing and circulating the air cooled by an evaporation heat exchanger 152 disposed inside of the air guide passage R, in the air guide passage R. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a showcase, and more particularly to an improvement in a showcase that sells products such as ice cream.

  Conventionally, showcases for selling products such as ice cream are known. Such a showcase includes a commodity storage box disposed inside a housing having an opening on the upper surface, and a sliding door type glass door for opening and closing the opening. The product storage box is a rectangular box made of a heat transfer material such as a metal material and having an upper surface opened. A heat insulating material is laid around the product storage box. Moreover, it is common that the cooling path is wound around the outer surface of the commodity storage box or in a meandering manner. This cooling path constitutes a refrigeration circuit with a compressor, a condenser, and the like disposed in the housing, and allows the refrigerant to pass therethrough.

  In such a showcase, when the refrigerant cooled by the operation of the refrigeration circuit passes through the cooling path, the product stored in the product storage box is cooled, the glass door is opened, and the opening is opened. In addition, the product stored in the product storage box can be taken out through the opening (see, for example, Patent Document 1 and Patent Document 2).

  However, in such a showcase, since the cooling path is provided in a mode in which the outer surface of the product storage box is wound or in a meandering mode, it is difficult to uniformly cool the entire product storage box, It is difficult to make the internal temperature of the product storage box uniform.

  Therefore, air cooled by a cooler such as an evaporator is transported, and the air contained in the interior is cooled by blowing it out into the internal space to be cooled (for example, inside the product storage box). A showcase is known (see, for example, Patent Document 3). If the air thus cooled is blown out and cooled, the internal temperature of the commodity storage box can be made uniform.

JP-A-5-045046 JP-A-8-303927 JP 2005-226894 A

  However, in the showcase in which the air cooled by the cooler is blown into the inside of the product storage box to cool the product as described above, when the glass door is opened and the opening is opened, The inside of the product storage box is opened to the outside air through the opening, and as a result, the cooled air blown out inside is rapidly warmed to the outside air, so-called heat leak phenomenon called so-called heat leak As a result, the cooling efficiency was not excellent.

  In view of the above circumstances, an object of the present invention is to provide a showcase capable of efficiently cooling a product while suppressing heat leak while achieving uniform internal temperature of the product storage box.

  In order to achieve the above object, a showcase according to claim 1 of the present invention includes a housing having an opening on its upper surface that can be opened and closed by a door, and a commodity storage box disposed inside the housing. And when the opening is opened, the product stored in the product storage box can be taken out through the opening. An air guide path provided in a state of being sealed in an outer peripheral region, and air cooled by a cooler provided inside the air guide path to circulate the inside of the air guide path, thereby the product. It is characterized by comprising air blowing means for cooling the product accommodated in the storage box.

  The showcase according to claim 2 of the present invention is the showcase according to claim 1, wherein the air blowing means stores the product after passing the air cooled by the cooler through the vicinity of the upper region of the product storage box. It blows in the aspect which passes the lower region vicinity of a box, It is characterized by the above-mentioned.

  The showcase according to claim 3 of the present invention partitions the air passing through the vicinity of the upper region of the product storage box from the air passing through the vicinity of the lower region of the product storage box according to claim 2 described above. The partition member for providing is provided.

  A showcase according to claim 4 of the present invention is characterized in that, in claim 3 described above, the partition member is provided with a slit extending in the vertical direction.

  A showcase according to a fifth aspect of the present invention is the showcase according to any one of the first to fourth aspects, wherein the cooler generates cold heat generated in a low temperature part of a Stirling refrigerator disposed in the housing. It is characterized in that a cold heat transporting means for transporting to is provided.

  The showcase according to claim 6 of the present invention is the showcase according to claim 5 described above, wherein the cold heat transport means is thermally connected to the low temperature part of the Stirling refrigerator, and the internal heat is generated by the cold generated in the low temperature part. A heat exchanger for condensing the working fluid, the cooler for evaporating the working fluid condensed in the heat exchanger to cool the air in the air duct, and the working fluid condensed in the heat exchanger The Stirling refrigerator has a delivery flow path for delivering to the cooler and a return flow path for returning the working fluid evaporated in the cooler to the heat exchanger, and circulating the working fluid It is characterized by transporting cold heat generated in the low temperature part.

  A showcase according to claim 7 of the present invention is characterized in that, in claim 6 described above, carbon dioxide is used as the working fluid.

  According to the present invention, the air that has been cooled by the cooler by the air blowing means is blown, and the inside of the air guide path provided in a state of being sealed in the outer peripheral area of the product housing box is circulated, thereby the product housing box. Since the product stored in the product is cooled, the internal temperature of the product storage box can be made uniform by cooling the entire product storage box evenly, and the product can be efficiently handled by suppressing heat leak. There is an effect that it can be cooled.

  Hereinafter, preferred embodiments of a showcase according to the present invention will be described in detail with reference to the accompanying drawings.

  1 to 3 schematically show a showcase in an embodiment of the present invention, respectively. FIG. 1 is a cross-sectional view (cross-sectional plan view) showing an internal structure when viewed from the front. FIG. 2 is a cross-sectional view (cross-sectional plan view) showing the internal structure when viewed from above, and FIG. 3 is a cross-sectional side view. The showcase 1 illustrated here is for selling products such as ice cream, and includes a case body 10.

  The case main body 10 is a housing having a first case main body 10a having an opening 11 on an upper surface and a second case main body 10b detachably provided on the first case main body 10a. In the following, for convenience of explanation, the first case body 10a and the second case body 10b are engaged and described as one housing. Such a case main body 10 includes a glass door (door body) 12 for opening and closing the opening 11, and a product storage box 13, a Stirling refrigerator 14, a cold heat transport means 15 and a blower fan F inside. I have.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is.

  The product storage box 13 is made of a heat transfer material such as a metal material, for example, and is a rectangular box whose upper surface is open. The product storage box 13 is disposed in the lower region of the opening 11 inside the case main body 10 (first case main body 10 a), and the opening on the upper surface coincides with the opening 11. This product storage box 13 is for storing products.

  An air guide path R is provided in the outer peripheral area of the product storage box 13 inside the case body 10. The air guide path R, which will be described later in detail, is for circulating air, and is provided in a sealed state by being provided with a heat insulating material 16 such as a heat insulating board. Thereby, the product storage box 13 surrounded by the air guide path R in the outer peripheral region is disposed inside the case body 10 in a thermally insulated manner.

  The Stirling refrigerator 14 is placed horizontally on the upper side of the right region of the opening 11 inside the case main body 10 (second case main body 10b). The Stirling refrigerator 14 has a cylindrical low-temperature part 141 that generates cold heat when driven. In this specification, “right” refers to the right direction when the showcase 1 is viewed from the front side, and “left” refers to the opposite direction.

  The cold heat transport means 15 is a heat pipe in which a refrigerant that is a working fluid is enclosed, and a condensing heat exchanger (heat exchanger) 151 and an evaporating heat exchanger (cooler) 152 are connected to a liquid pipe ( It is configured by separately connecting a delivery channel) 153 and a gas pipe (return channel) 154. Here, as the refrigerant, for example, a gas such as carbon dioxide which is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 141 of the Stirling refrigerator 14 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 151 is disposed in such a manner as to cover the side peripheral surface of the low temperature portion 141 of the Stirling refrigerator 14. More specifically, the condensation heat exchanger 151 has a cylindrical shape whose diameter is larger than that of the low temperature portion 141 of the Stirling refrigerator 14, and a flow path (not shown) through which the refrigerant passes is provided. It is formed. The condensing heat exchanger 151 is thermally connected to the low temperature portion 141, and the refrigerant in the flow path is condensed by the cold heat from the low temperature portion 141.

  The evaporative heat exchanger 152 is disposed inside the air guide path R in the case main body 10 (second case main body 10 b) and below the low temperature portion 141 of the Stirling refrigerator 14. More specifically, the evaporative heat exchanger 152 has a flow path (not shown) through which the refrigerant passes, and the refrigerant passing through the flow path is obtained from the air in the air guide path R. It is evaporated by heat. In other words, the air around the evaporating heat exchanger 152 is cooled because heat is taken away as the refrigerant evaporates.

  The liquid pipe 153 is a pipe that connects the condensation heat exchanger 151 and the evaporation heat exchanger 152. The liquid pipe 153 is for sending the refrigerant condensed in the condensation heat exchanger 151 from the condensation heat exchanger 151 to the evaporation heat exchanger 152.

  The gas pipe 154 is a pipe that connects the condensation heat exchanger 151 and the evaporation heat exchanger 152 separately from the liquid pipe 153. The gas pipe 154 is for returning the refrigerant evaporated in the evaporating heat exchanger 152 from the evaporating heat exchanger 152 to the condensing heat exchanger 151.

  In the cold heat transport means 15, the refrigerant circulates between the condensing heat exchanger 151 and the evaporating heat exchanger 152 through the separately provided liquid pipe 153 and gas pipe 154, and is a loop thermosyphon type. This is called a heat pipe.

  The blower fan F is disposed in the vicinity of the evaporation heat exchanger 152 inside the air guide path R of the case body 10 (second case body 10b). The blower fan F is driven by a drive command, and constitutes a blower that blows air cooled by the evaporative heat exchanger 152.

  In addition, a regulation plate 17, a partition plate 18, a heater 19, and a drain pan 20 are provided inside the case body 10. The restriction plate 17 is a plate-like body provided on the top of the evaporation heat exchanger 152 and restricts the flow of air (cooling air) blown by the blower fan F. The partition plate 18 is a long plate-shaped partition member, and is provided in such a manner as to divide the air guide path R up and down on the front surface and the back surface of the product storage box 13. The partition plate 18 is provided at the same height level as the restriction plate 17. With such a partition plate 18, the air guide path R on the front side and the air guide path R on the back side of the commodity storage box 13 are partitioned vertically. Further, the air guide path R on the left side of the product storage box 13 is not provided with the partition plate 18.

  The heater 19 is provided in the lower part of the evaporative heat exchanger 152 and is used when the evaporative heat exchanger 152 is defrosted. The drain pan 20 is provided in a lower region of the evaporating heat exchanger 152 and stores drain water such as condensed water generated in the evaporating heat exchanger 152. Here, reference numeral 21 in FIG. 1 is a drain hose for guiding drain water generated in the evaporative heat exchanger 152 to the drain pan 20.

  In the showcase 1 having the above-described configuration, the cold heat from the low temperature portion 141 of the Stirling refrigerator 14 is transported to the evaporative heat exchanger 152 through the cold heat transport means 15 as follows. The refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 151 is cooled and condensed by the cold generated from the low temperature portion 141, liquefies, and moves downward due to its gravity. Thereafter, the refrigerant moves to the evaporating heat exchanger 152 through the liquid pipe 153. In the evaporative heat exchanger 152, the refrigerant evaporates due to the heat of the air around the evaporative heat exchanger 152, that is, the air in the air guide path R, while passing through the flow path. That is, the air in the air guide path R is cooled because heat is taken away, and thus the cold heat generated in the low temperature portion 141 of the Stirling refrigerator 14 is transported to the evaporation heat exchanger 152. By the way, the refrigerant evaporated in the evaporating heat exchanger 152 reaches the condensing heat exchanger 151 through the gas pipe 154, is condensed again when passing through the flow path, and repeats the above-described cycle.

  In the showcase 1, when the blower fan F is driven by a drive command, the surrounding air of the evaporating heat exchanger 152, that is, the air cooled by the evaporating heat exchanger 152 is blown. The blown cooling air collides with the right side wall forming the air guide path R and rises, and then moves to the left. Here, as described above, the partition plate 18 is provided in such a manner as to divide the air guide path R up and down, so that the air to be blown is the upper area of the product storage box 13 as shown by the arrows in FIG. It passes through the vicinity, then collides with the left side wall, descends, and moves to the right. That is, it passes through the vicinity of the lower region of the product storage box 13 and returns to the position where the evaporative heat exchanger 152 is disposed.

  In this way, the cooling air is blown in such a manner that it passes through the vicinity of the lower region of the product storage box 13 after passing through the vicinity of the upper region of the product storage box 13. The air cooled by 152 is blown in such a manner that it passes through the vicinity of the lower region of the product storage box 13 after passing through the vicinity of the upper region of the product storage box 13 to circulate inside the air guide path R. As a result of the cooling air circulating in the air guide path R by the blower fan F, heat exchange is performed between the cooling air and the product stored in the product storage box 13 and the internal atmosphere. The product accommodated in 13 and the internal atmosphere of the product storage box 13 are cooled to a desired cooling temperature (for example, −20 ° C. or the like).

  As described above, according to the showcase 1 in the embodiment of the present invention, the air cooled by the evaporative heat exchanger 152 is blown by the action of the blower fan F, and sealed in the outer peripheral area of the commodity storage box 13. Since the product stored in the product storage box 13 is cooled by circulating the inside of the air guide path R provided in the state, the product storage is performed by cooling the entire product storage box 13 evenly. The internal temperature of the box 13 can be made uniform, and the product can be efficiently cooled while suppressing heat leak.

  According to the showcase 1, the air cooled by the evaporative heat exchanger 152 is blown and guided in such a manner that the air passes through the vicinity of the upper region of the product storage box 13 and then passes the vicinity of the lower region of the product storage box 13. Since the inside of the air path R is circulated, the upper region of the product storage box 13 having the largest amount of heat intrusion can be satisfactorily cooled by the influence of the opening 11 and the like.

  Further, according to the showcase 1, in order to cool the air in the air guide path R, the Stirling refrigerator 14 is used as a cooling source, and the cold heat generated in the low temperature portion 141 of the Stirling refrigerator 14 through the cold heat transport means 15 is reduced. Since the heat is transported to the evaporating heat exchanger 152, the temperature difference between the cold generated in the low temperature portion 141 of the Stirling refrigerator 14 and the cold transported to the evaporating heat exchanger 152 can be made extremely low. Moreover, no fluorocarbon refrigerant is used. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature part 141 of the Stirling refrigerator 14 can be efficiently transported to the evaporating heat exchanger 152 to cool the air.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made. A modification will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to what has the same structure as embodiment mentioned above.

  In the showcase 2 shown in FIG. 4, a plurality of rectifying plates 22 may be provided above the air guide path R of the second case main body 10 b, that is, above the regulating plate 17. By providing such a current plate 22, it is possible to avoid the flow of air passing through the vicinity of the upper region of the product storage box 13 from becoming uneven, and to allow the vicinity of the upper region of the product storage box 13 to pass evenly. It becomes possible.

  In the showcase 3 shown in FIG. 5, a plurality of partition plates 18 a to 18 c may be provided in the air guide paths R on the front side and the back side of the commodity storage box 13. According to such a configuration, it is possible to avoid the air flow passing through the vicinity of the upper region of the product storage box 13 from becoming a drift.

  In the showcase 4 shown in FIG. 6, the partition plate 180 may be provided with a slit 181 extending along the vertical direction. According to such a configuration, it is possible for air passing through the vicinity of the upper region of the product storage box 13 to pass through the slit 181 and pass through the vicinity of the lower region of the product storage box 13. The size can be maximized.

  As described above, the showcase according to the present invention is useful for selling products such as ice cream.

It is a section front view showing simply the showcase in the embodiment of the present invention. It is a section top view showing simply the showcase in the embodiment of the present invention. It is a sectional side view showing simply the showcase in the embodiment of the present invention. It is a section front view showing simply the modification of the showcase in the embodiment of the present invention. It is a section front view showing simply the modification of the showcase in the embodiment of the present invention. It is a section front view showing simply the modification of the showcase in the embodiment of the present invention.

Explanation of symbols

1, 2, 3, 4 Showcase 10 Case body (housing)
10a 1st case main body 10b 2nd case main body 11 Opening part 12 Glass door (door body)
13 Commodity storage box 14 Stirling refrigerator 141 Low-temperature part 15 Cold transport means 151 Condensation heat exchanger (heat exchanger)
152 Evaporation heat exchanger (cooler)
153 Liquid piping 154 Gas piping 17 Restriction plate 18 Partition plate 19 Heater 20 Drain pan F Blower R R Air guide

Claims (7)

A housing having an opening on the top surface that can be opened and closed by a door body;
A showcase in which the product stored in the product storage box can be taken out through the opening when the opening is opened.
An air guide path provided inside the casing and sealed in an outer peripheral region of the commodity storage box;
A blowing means for cooling the product stored in the product storage box by blowing air cooled by a cooler provided inside the wind guide path and circulating the air inside the wind guide path; A showcase characterized by that.   2. The air blower according to claim 1, wherein the air cooled by the cooler blows air in a mode of passing through the vicinity of the lower region of the product storage box after passing through the vicinity of the upper region of the product storage box. Showcase described.   The showcase according to claim 2, further comprising a partition member for partitioning air that passes in the vicinity of the upper region of the product storage box and air that passes in the vicinity of the lower region of the product storage box.   The showcase according to claim 3, wherein the partition member is provided with a slit extending in a vertical direction.   The show according to any one of claims 1 to 4, further comprising cold heat transport means for transporting cold heat generated in a low temperature part of a Stirling refrigerator disposed in the housing to the cooler. Case. The cold transport means is
A heat exchanger that is thermally connected to a low-temperature portion of the Stirling refrigerator, and that condenses an internal working fluid by the cold generated in the low-temperature portion;
The cooler that evaporates the working fluid condensed in the heat exchanger and cools the air in the air duct;
A delivery flow path for delivering the working fluid condensed in the heat exchanger to the cooler;
A return flow path for returning the working fluid evaporated in the cooler to the heat exchanger, and transporting the cold generated in the low temperature part of the Stirling refrigerator by circulating the working fluid. 6. The showcase according to claim 5, wherein the showcase is characterized.   The showcase according to claim 6, wherein carbon dioxide is used as the working fluid.

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