JP2009156475A - Showcase for cold storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a showcase for cold storage including cold-insulating a display shelf of an upper stage in a weak cold temperature range for a packaged lunch, rice balls or the like, and cold-insulating a display shelf of a lower stage in a refrigeration temperature range for related products such as packaged salad, by one showcase. <P>SOLUTION: In this showcase for cold storage having a first air trunk A for successively circulating the cold air cooled by a cooler from a front portion, a bottom portion, a back portion and a ceiling portion of the showcase to the front face portion by a first circulation fan, a second air trunk B for successively circulating the non-cooling air at the outside of the first air trunk by a second circulation fan, and an insertion port 16 formed on a back plate of a commodity display portion to insert a rear portion of an intermediate shelf duct, and partitioned into a refrigeration temperature range at a lower part of the intermediate shelf duct and the weak cold temperature range at an upper part of the intermediate shelf duct 15 by inserting the intermediate shelf duct 15 into the insertion port 16, a vent hole 18 is formed on a partitioning plate 17 for partitioning the first air trunk A and the second air trunk B of the back portion, to communicate the first air trunk A and the second air trunk B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerated showcase. More specifically, the product display portion of the showcase body is used for refrigeration, and the refrigerated showcase can be used at the same time for refrigeration on the upper side and for refrigeration on the lower side. About.

  In the supermarket and convenience stores, lunch boxes and rice balls, salad packs, and other side dishes are displayed in different cold storage temperature ranges (the bento boxes and rice balls have a slightly cold temperature range of about 18 ° C, and the salad packs have a refrigerated temperature range) From about 5 ° C) and sold separately in separate front open type refrigerated showcases.

  On the other hand, in recent years, a refrigerated showcase has been used as a single showcase that covers two different temperature zones. This refrigerated display case is designed so that the upper side of the display shelf can be used as a refrigerated display and the lower side can be used as a refrigerated display, and can be used for tea, coffee at supermarkets and convenience stores. It is used to display and sell PET bottle beverages and can beverages such as hot and cold at the same time.

As such a refrigerated storage case, a first air passage that circulates cold air sequentially through the front, bottom, back, ceiling, and front portions of the showcase to form a cooling air curtain in front, A second air passage that forms an uncooled air curtain that circulates outside the first air passage and protects the cooling air curtain; and an intermediate shelf duct with a wind tunnel from the back of the first air passage. And a third air passage that forms a cooling air curtain in front of the lower side of the intermediate shelf, and when the third air passage is formed and the first air passage is blocked, A structure in which the lower part of the shelf is divided into a refrigeration temperature zone (for example, around 5 ° C.) by the cold air of the third air passage and the upper portion of the intermediate shelf is divided into a low temperature zone (for example, around 18 ° C.) of the second air passage by uncooled air Have been proposed (see, for example, Patent Document 1).
JP 2007-187391 A

  However, if the airtightness behind the intermediate shelf duct with the wind tunnel that forms the third air passage is insufficient, a part of the cold air for cooling the refrigeration temperature zone below the intermediate shelf through the third air passage is intermediate. In some cases, the product leaks upward from the shelf and flows into the low-cooling temperature zone, and the products displayed in the low-cooling temperature zone may be cooled to a temperature lower than the set temperature. In addition, since the column supporting the shelf bracket is cooled by cold air and is in a low temperature state, condensation is generated on the column surface when the upper part of the intermediate shelf is set to a slightly cold temperature zone, so that this can be prevented. It was necessary to provide a dew-proof heater.

  Therefore, the present invention prevents cold air from flowing into the low temperature zone when the product display section is partitioned into the cold temperature zone and the low temperature zone, and can maintain the low temperature zone at the set temperature. The purpose is to provide a showcase.

  In order to achieve the above object, the refrigerated showcase of the present invention circulates the cool air cooled by the cooler sequentially from the front, bottom, back and ceiling of the showcase to the front part by the first circulation fan. A first air passage that forms an air curtain in front of the product display portion, a second air passage through which uncooled air is sequentially circulated by a second circulation fan outside the first air passage, and a back of the product display portion. An insertion port through which the rear portion of the intermediate shelf duct is inserted into the face plate, and when the rear portion of the intermediate shelf duct is inserted into the insertion port, the cool air in the first air passage flowing through the rear portion is In the refrigeration showcase in which the lower part of the intermediate shelf duct is divided into a refrigeration temperature zone and the upper part of the intermediate shelf duct is divided into a low temperature zone by guiding the wind through the wind tunnel of the intermediate shelf duct from the middle. One airway and the second In the vicinity of the insertion opening of the partition plate for partitioning the air passage is characterized in that a vent hole for communicating the first air passage and the second air passage.

  Furthermore, in the refrigerated showcase of the present invention, it is preferable that the second air path is disposed around the support columns provided at both ends in the width direction of the product display section.

  According to the showcase for refrigeration of the present invention, when the intermediate shelf duct is attached to the insertion port and the product display part is partitioned into the refrigeration temperature zone and the weakly cool temperature zone, the leak has occurred upward from the rear part of the intermediate shelf duct. The cold air can be passed from the air outlet to the second air passage, and the cold air can be prevented from flowing into the weakly cool temperature range. Therefore, the product displayed in the low-cooling temperature zone is not cooled to a temperature lower than the set temperature. Further, by arranging the second air passage around the support column, the support column is not cooled to a low temperature by the cold air flowing through the first air passage, and no dew condensation occurs on the support column even when the temperature is set in a low temperature range. The dew proof heater can be omitted.

  The best mode of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional side view of a refrigerated showcase according to the present invention, and FIG. 2 is a state where the second circulation fan for the low temperature zone is stopped in a state where the product display portion is partitioned into the refrigeration temperature zone and the low temperature zone. FIG. 3 is an explanatory view showing the flow of the cold air when the second circulation fan is operating, and FIG. 4 is the same set temperature (not divided into the product display section). It is explanatory drawing which shows the flow of the cold wind when it is set as a whole-stage refrigeration setting. In addition, although the cross-sectional side view of FIG. 1 has shown the example which has arrange | positioned the 1st circulation fan for refrigeration temperature zone | bands and the 2nd circulation fan for weak cooling temperature zone | lines back and forth, the flow of the cold wind of FIGS. In the explanatory diagram showing, for the sake of convenience of explanation, an example of arrangement on the left and right is shown. This arrangement is a matter that can be appropriately selected according to the size and structure of the showcase.

  As shown in FIG. 1, a refrigerated showcase 1 according to the present invention is formed by filling a main body 2 having a substantially U-shaped cross section with a front opening with a heat insulating material. A product display section 4 is defined by the inner panel 3 inside the opening, and a display shelf 5 is hooked up and down by a plurality of stages.

  In the showcase 1, cold air is circulated in sequence with the front part 2a, bottom part (bottom duct) 2b, back part (back duct) 2c, ceiling part (ceiling duct) 2d, and front part 2a of the showcase 1, A first air passage A is provided that forms a cooling air curtain (air curtain temperature 0 to 5 ° C.) from the cold air outlet 6 toward the suction port 7 in the lower front portion. A first circulation fan 8 is disposed in the bottom duct 2b of the first air passage A, and a cooler 9 is disposed between the bottom duct 2b and the back duct 2c.

  Further, in the showcase 1, uncooled air circulation ducts (a bottom duct 2e, a rear duct 2f, a ceiling duct 2g) for forming a double air curtain outside the first air passage A are provided. And a second air passage B that forms an uncooled air curtain (air curtain temperature of 10 to 15 ° C.) from the non-cool air outlet 10 toward the suction port 11 is provided. A second circulation fan 12 is disposed in the bottom duct 2e of the second air passage B. In the first circulation fan 8 and the second circulation fan 12, the air volume of the first circulation fan 8 is set large in order to prepare for the refrigeration operation.

  In the showcase 1 of the present embodiment, the intermediate shelf duct 15 is inserted into the shelf holder 14 of the desired display shelf 5 (here, the third level from the top), so that the third level display rack is displayed. The lower side than 5 can be kept in the refrigeration temperature zone by the cold air of the third air passage C, and the upper side from the display shelf 5 of the third stage from the upper side is the low cold temperature zone by the uncooled air of the second air passage B (around 18 ° C.) ).

  As shown in FIGS. 2 to 4, the inner panel (back plate) 3 on the back side is formed with a plurality of upper and lower insertion ports 16 into which the rear end portion of the intermediate shelf duct 15 is inserted. When the rear end portion of the intermediate shelf duct 15 is inserted into the insertion port 16, the rear duct 2 c is partitioned vertically, and the cold air that is cooled by the lower cooler 9 and rises up the rear duct 2 c enters the wind tunnel of the intermediate shelf duct 15. Then, the air is guided forward and the air curtain of the third air passage C is sucked into the suction port 7. Further, by partitioning the back duct 2c, it is possible to suppress the cool air rising up the back duct 2c from flowing into the weakly cool temperature zone, and the uncooled air of the second air passage B is supplied to the weakly cool temperature zone.

  Furthermore, the partition plate 17 that divides the rear duct 2c of the first air passage A and the rear duct 2f of the second air passage at the rear portion is provided on both rear ducts in the vicinity of the insertion port 16 and at substantially the same height position. Ventilation holes 18 are provided for communicating 2c and 2f.

  In the refrigerated showcase 1, when the third air passage C and the second air passage B are working, the upper product display section 4 (that is, the weakly cool temperature zone) to which the intermediate shelf duct 15 is inserted is installed. The temperature control is performed by controlling the second circulation fan 12. This control is a control for turning on and off the operation of the second circulation fan 12 by a signal from a temperature sensor (not shown) provided in the upper product display unit 4. If the product display unit 4 is too cold, the control is performed first. The fan 12 for two air paths is turned off and stopped. When the air temperature rises above a certain level, the fan 12 is turned on and the operation of the fan 12 is restarted, and the uncooled air is circulated through the second air path B. At this time, since the suction port 11 of the second air passage B is in a position substantially common to the suction port 7 of the third air passage C, the cold air of the third air passage C and the uncooled air of the second air passage B are mixed. . Therefore, the circulating air passing through the second air passage B can be kept slightly cooler than the store atmosphere temperature, and the upper side of the display shelf with the intermediate shelf duct 15 can be controlled to a set temperature of about 18 ° C.

  Further, the temperature control in the refrigeration temperature zone is performed by controlling the operation of the first circulation fan 8 to be turned on and off. This control is performed by turning off the first circulation fan 8 and stopping when the inside of the product display unit 4 is too cold due to a signal from a temperature sensor (not shown) provided in the lower product display unit 4. Is turned on, the operation of the first circulation fan 8 is restarted, and the cold air is circulated through the third air passage C.

  As shown in FIG. 2, when the first circulation fan 8 is operating and the second circulation fan 12 is stopped, the air curtain of the third air passage C is caused by the suction force of the first circulation fan 8 having a large air volume. The formed cold air and the non-cooled air forming the air curtain of the second air passage B are sucked from the suction ports 7 and 11, and the non-cooling air in the rear duct 2f of the second air passage B is stopped from the rear duct 2f. The second circulation fan 12 is caused to flow backward (arrow B1) and sucked into the first circulation fan 8 (arrows A1 and A2).

  The cold air discharged from the first circulation fan 8 and cooled by the cooler 9 rises in the rear duct 2c of the first air passage A (arrow A3), and an intermediate shelf duct 15 (not shown) is inserted. It flows out from the insertion port 16 into the wind tunnel of the intermediate shelf duct 15 (arrow C1). At this time, there is a gap between the rear end portion of the intermediate shelf duct 15 inserted into the rear duct 2c from the insertion port 16 and the partition plate 17, or there is a gap in the lid that closes the insertion port 16, and the rear surface. Some of the cool air that has risen in the duct 2c may leak from these gaps. As described above, the leaked cold air has a low pressure in the rear duct 2f because uncooled air is sucked into the first circulation fan 8 through the second circulation fan 12. Then, the leaked cold air is sucked into the rear duct 2f through the ventilation port 18 provided in the partition plate 17 (arrow D1), flows along with the non-cooling air flowing back through the second circulation fan 12, and the second circulation fan 12 flows backward and is sucked into the first circulation fan 8. Therefore, it is possible to prevent the leaked cold air from flowing into the product display unit 4 controlled in the weak cooling temperature zone above the intermediate shelf duct 15, and the product displayed in the weak cooling temperature zone has a temperature lower than the set temperature. It will not be cooled.

  On the other hand, as shown in FIG. 3, when the second circulation fan 12 is in operation, the cold air in the third air passage C is sucked into the first circulation fan 8 from the suction port 7 as described above (arrow A1). Then, it is cooled by the cooler 9 and ascends in the rear duct 2c (arrow A3) and flows out from the insertion port 16 into which the intermediate shelf duct 15 (not shown) is inserted (arrow C1). In the second air passage B, the uncooled air sucked from the suction port 11 is sent out from the second circulation fan 12 into the rear duct 2f (arrow B3), and rises in the rear duct 2f (arrow B4), and the ceiling By flowing toward the duct 2g, temperature control in the weakly cold temperature range is performed. At this time, a part of the cool air (arrow C2) leaking from the gap at the rear end of the intermediate shelf duct 15 merges with uncooled air (arrow B4) rising in the rear duct 2f, and from the gap at the insertion port 16. A part of the leaked cold air (arrow C3) flows out above the intermediate shelf duct 15, but the amount of cold air leaked is smaller than that of uncooled air, and the cooling operation in the weak cold temperature range is underway. Absent.

  As shown in FIG. 4, when the product display unit 4 is not partitioned by the intermediate shelf duct 15 and the entire temperature is set to the same set temperature (all-stage refrigeration setting), the cold air sucked into the first circulation fan 8 (arrow A1) is Even if it is cooled by the cooler 9 and rises in the rear duct 2c (arrow A3) and some cool air leaks from the gap of the insertion port 16 (arrow A4), most of it is in the rear duct 2c. (Arrow A5) and flows toward the ceiling duct 2d. Further, the uncooled air (arrow B3) sent out from the second circulation fan 12 into the rear duct 2f rises in the rear duct 2f (arrow B4) and flows toward the ceiling duct 2g. As a result, an air curtain made of cold air and an air curtain made of uncooled air are formed in the opening of the product display unit 4, and the entire product display unit 4 is held at the refrigeration temperature.

  Moreover, as shown in FIGS. 2-4, the cooler 9 is arrange | positioned in the width direction center part, and the width direction both ends of the goods display part 4 are arrange | positioned by arrange | positioning the back surface duct 2f through which uncooled air flows on both sides. Since uncooled air mainly flows around the support provided at the (end part) and the support is not cooled to a low temperature, condensation does not occur on the support in the low-temperature zone, and it is prevented. The dew heater can be omitted.

It is a cross-sectional side view of the refrigerated showcase of the present invention. It is explanatory drawing which shows the flow of cold air when the 2nd circulation fan for low cold temperature zones has stopped in the state which partitioned off the merchandise display part into the cold storage temperature zone and the weak cold temperature zone. It is explanatory drawing which similarly shows the flow of the cold wind when the 2nd circulation fan is act | operating. It is explanatory drawing which shows the flow of the cold wind when the whole is made into the same preset temperature (all-stage refrigeration setting) without partitioning a goods display part.

Explanation of symbols

A 1st air path B 2nd air path C 3rd air path 1 Showcase 2 for refrigeration Main body 2a Front part 2b Bottom duct 2c Rear duct 2d Ceiling duct 2e Bottom duct 2f Rear duct 2g Ceiling duct 3 Internal panel 4 Product display part 5 Display shelf 6 Cold air outlet 7 Suction port 8 Circulating fan 9 Cooler 10 Non-cold air outlet 11 Suction port 12 Circulating fan (second airway fan)
14 Shelf receptacle 15 Intermediate shelf duct 16 Insertion slot 17 Partition plate 18 Ventilation opening

Claims (2)

  A first air passage that circulates the cool air cooled by the cooler sequentially from the front, bottom, back, and ceiling parts of the showcase to the front part by a first circulation fan to form an air curtain in front of the product display part A second air passage that sequentially circulates outside the first air passage by a second circulation fan, and an insertion port into which a rear portion of the intermediate shelf duct is inserted into a back plate of the product display portion, When the rear part of the intermediate shelf duct is inserted into the mouth, the cold air in the first air passage flowing through the rear part is guided from the middle of the rear part to the front part through the wind tunnel of the intermediate shelf duct, thereby lowering the intermediate shelf duct. In the refrigeration showcase that partitions the upper shelf duct into the weak cooling temperature zone, and in the vicinity of the insertion port of the partition plate that partitions the first air passage and the second air passage in the rear portion In addition, the first wind path and the second wind path Refrigerated showcase, characterized in that a vent hole to pass.   The showcase for refrigeration according to claim 1, wherein the second air passage is disposed around a support provided at both ends in the width direction of the product display portion.

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