JP6249738B2 - Open showcase - Google Patents

Description

  The present invention relates to an open showcase that is installed in a supermarket, a convenience store, or the like and used to display and sell frozen foods and fresh foods.

  Conventionally, in stores such as supermarkets and convenience stores, cold air circulation type open showcases for displaying frozen foods and fresh foods are used. In such an open showcase, a display chamber is formed inside the showcase body and an opening is formed in the front surface of the showcase body, and an air curtain is formed in the opening portion by circulating cold air. Products in the room are being cooled.

  Furthermore, in such an open showcase, in order to improve the cooling performance of the goods in the display room, an air blowway having two layers of an inner air passage and an outer air passage is provided in the showcase body, and the inner air passage is provided in the inner air passage. The thing which installed the cooler is known (refer the following patent document 1).

  In an open showcase with two layers of inner and outer air passages, a fan plenum with a plurality of air blowing fans mounted side by side in the same direction is installed at the bottom of the showcase body, and the air blowing fan is driven to drive the inside air passage. And a flow of cold air is generated in the outside air passage. The cold air flowing in the inner air passage is blown out from the air outlet provided in the upper part of the inner air passage, and is mainly sucked in from the suction port provided in the lower part of the inner air passage, and the cold air flowing in the outer air passage is Two layers of air that is blown out from the air outlet provided in the upper part of the outer ventilation passage and is mainly sucked from the suction port provided in the lower part of the outer air passage and covers the opening by the cold air flowing from the air outlet toward the suction port A curtain is formed.

  When a plurality of blower fans, for example, three blower fans are mounted on the fan plenum, two blower fans on both sides are used to generate a flow of cool air in the inner blower passage, and one blower fan in the center Is used to generate a cold air flow in the outer air passage.

  Thus, by increasing the number of blower fans that generate a flow of cool air in the inner air passage to be larger than the number of blow fans that generate a flow of cool air in the outer air passage, the cool air that is blown through the inner air passage The wind speed of the air becomes faster, the cool air blown from the outlet of the inner air passage is surely delivered to the suction port of the inner air passage, and an air curtain is reliably formed by the cold air flowing in the inner air passage.

JP-A-6-137744

  However, there are various types of open showcases with different width dimensions, and open showcases with a width dimension of 8 (about 240 cm) are most often used, but those with a width of 4 or less are used. Has also been used.

  In an open showcase with a width dimension of 4 or less, a fan plenum equipped with two internal and external air passages and a plurality of blower fans for generating cool air flow in those air passages is provided at the bottom of the showcase body. Since the width of the fan plenum is small, the number of blower fans that can be mounted side by side in the same direction is limited to two.

  When the number of blower fans mounted on the fan plenum is limited to two, one blower fan is used to generate a flow of cool air in the inner blower passage, and the other blower fan is cold air in the outer blower passage. Used to generate a flow of

  However, in that case, the wind speed of the cool air blown from the air outlet of the inner air passage becomes slow, and the cold air blown from the air outlet of the inner air passage becomes difficult to reach the inlet of the inner air passage, and flows in the inner air passage. It becomes difficult to form a good air curtain due to cold air. And if it becomes difficult to form a good air curtain by the cold air flowing in the inner air passage, the outside air tends to flow into the display room, and the temperature management of the products in the display room becomes insufficient.

  In addition, when the number of blower fans is limited to two, the blower fan that generates the flow of cool air in the inner blower passage and the outer blower passage is shifted to the left or right side with respect to the inner and outer blower passages. Will do. As a result, the flow rate balance of the cool air blown from the air outlets of the internal and external air passages and the cold air sucked from the suction ports is difficult to be uniform in the horizontal direction of the open showcase, and the temperature of the display room is in the horizontal direction of the open showcase It becomes easy to produce variation.

  Furthermore, while the cooler installed in the inner air passage is installed in the center of the horizontal direction of the open showcase, the blower fan that generates the flow of cool air in the inner air passage is the width of the open showcase It is installed at the left or right of the center of the direction. For this reason, the contact condition with respect to the cooler of the cool air flowing through the inner air blowing path varies in the width direction of the cooler. As a result, frost is likely to be generated at portions where the cool air hits the cooler, and the performance of the cooler decreases.

  The present invention has been made to solve such a problem, and an object thereof is an open showcase having a small lateral width (for example, 4 or less), and an airflow path having two layers inside and outside the showcase body. An open show that can form a good air curtain that covers the opening when a fan plenum equipped with a plurality of blower fans that generate cool air flow is installed in the lower part of the showcase body Is to provide a case.

An open showcase according to the present invention includes a showcase body having an opening formed on the front surface and a display chamber formed therein, and a first air blow formed along a bottom surface, a back surface, and an upper surface of the showcase body. A second air passage formed inside the first air passage along a bottom surface, a rear surface, and an upper surface of the showcase body, a cooler installed in the second air passage, and the show One first blower fan installed in the lower part of the case body and generating a cool air flow in the first air passage and two second blower fans generating a cold air flow in the second air passage are mounted. In the open showcase provided with the fan plenum, the fan plenum is located on both sides of the first blower fan mounting portion and the first blower fan mounting portion to which the first blower fan is mounted. A second blower fan mounting portion to which a wind fan is mounted, the first blower fan mounting portion extends in a direction parallel to the front surface of the showcase body, and the second blower fan mounting portion is The cool air that is inclined inwardly with respect to the first blower fan mounting portion and is blown by the second blower fan is directed around the cooler.

  In the open showcase according to the above-described invention, it is desirable that a partition for partitioning the two second blower fans is provided in the fan plenum.

  According to the open showcase of the present invention, the fan plenum has a first blower fan mounting portion to which the first blower fan is mounted, and a second blower fan positioned on both sides of the first blower fan mounting portion. A second blower fan mounting portion, the first blower fan mounting portion extends in a direction parallel to the front surface of the showcase body, and the second blower fan mounting portion is relative to the first blower fan mounting portion. Inclined inward. For this reason, even when the width dimension of the showcase body is small, the fan plenum is located on both sides of the first air blowing fan and the first air blowing fan that generate a cold air flow in the first air passage. Thus, two second blower fans that generate a flow of cool air in the second blower passage can be mounted. Thereby, the wind speed of the cold air which flows in the 2nd ventilation path can be made quick, the favorable air curtain which covers opening can be formed, and the cooling performance of the goods displayed in the display room can be improved. In addition, the flow rate balance between the cool air blown from the air outlet and the cold air sucked from the air inlet can be made uniform in the width direction of the open showcase, and the temperature variation in the display room can be eliminated in the width direction of the open showcase. Can do. Furthermore, the contact condition of the cool air blown by the second blower fan with respect to the cooler can be made uniform in the lateral width direction of the cooler, and the generation of frost in the cooler can be suppressed.

  Moreover, since the partition body that partitions between the two second blower fans is provided in the fan plenum, it is possible to blow in a rectified state without mixing the cold air blown by the two second blower fans, The cold air blown out from the outlet of the second air passage can be evenly blown out in the lateral width direction of the open showcase, and the performance of forming a good air curtain can be enhanced.

It is a section side view showing the open showcase of one embodiment of the present invention. It is a cross-sectional top view which shows the mounting state of the 1st and 2nd ventilation fan to a fan plenum. It is a cross-sectional side view which shows the flow state of the cold air ventilated by the 1st, 2nd ventilation fan.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional side view showing an open showcase 1. This open showcase 1 has a base 2 and a U-shaped showcase body 3 fixed to the top of the base 2, and an opening 4 is formed on the front surface of the showcase body 3. A display chamber 5 is formed inside the case body 3. A plurality of display shelves 6 for displaying products are provided in the display chamber 5 in the vertical direction.

  The showcase body 3 includes an outer heat insulating wall 7 formed along the bottom surface, the back surface, and the upper surface, an inner heat insulating wall 8 formed inside the outer heat insulating wall 7 with a gap from the outer heat insulating wall 7, and an inner heat insulating wall. 8 and an inner surface plate 9 formed so as to cover the inner side of the inner heat insulating wall 8 with an interval, and an outer surface plate 10 formed so as to cover the upper surface and the rear surface of the outer heat insulating wall 7 with an interval. ing. The inner portion of the inner surface plate 9 serves as the display chamber 5, and the rear end portion of the display shelf 6 is attached to the inner surface plate 9.

  The showcase body 3 is located between the outer heat insulating wall 7 and the inner heat insulating wall 8, and is formed along the bottom surface, the back surface, and the top surface of the showcase body 3, and the inner heat insulating material. A second air passage 12 which is located between the wall 8 and the inner surface plate 9 and is formed inside the first air passage 11 along the bottom, back and top surfaces of the showcase main body 3; A third air passage 13 is provided between the outer surface plate 10 and formed along the back and top surfaces of the showcase body 3.

  A blower outlet 11 a that opens downward is formed at the upper front side of the first air passage 11, and a suction port 11 b that opens upward is formed at the lower end of the front side of the first air passage 11. A blower opening 12a that opens downward is formed at the front upper end of the second air passage 12, and a suction port 12b that opens upward is formed at the front lower end of the second air passage 12. A blower outlet 13 a that opens downward is formed at the upper end on the front side of the third air passage 13, and the lower end side of the third air passage 13 communicates with the internal space of the base 2. A clearance 14 that communicates with the inside of the base 2 is provided at the lower part on the front side of the base 2.

  A cooler 15 is installed in the second air passage 12, and a refrigerating device such as a compressor, a condenser, and an expansion valve (none of which are shown) is connected to the cooler 15 through a pipe through which the refrigerant flows. Components to be connected are connected. The expansion valve is installed in the second air passage 12 together with the cooler 15, and the compressor and the condenser are installed in a machine room (not shown) installed separately from the open showcase 1.

  A fan plenum 16 is installed in the lower part of the showcase body 3. The fan plenum 16 divides the lower portion of the showcase body 3 into a region that becomes a part of the first air passage 11 and a region that becomes a part of the second air passage 12, and the flow of cold air in the first air passage 11. This is a case in which one first blower fan 17 that generates air and two second blower fans 18 that generate a flow of cool air in the second air passage 12 are mounted.

  A third blower fan 19 that generates a flow of cool air in the third air passage 13 is installed on the upper side in the third air passage 13.

  FIG. 2 is a cross-sectional plan view showing a state in which the first blower fan 17 and the second blower fan 18 are mounted on the fan plenum 16. The fan plenum 16 includes a first blower fan mounting portion 20 to which the first blower fan 17 is mounted, and a second blower fan mounting portion to which the second blower fan 18 is mounted on both sides of the first blower fan mounting portion 20. 21. The first blower fan mounting part 20 extends in a direction parallel to the front surface of the showcase main body 3, and the second blower fan mounting part 21 is inward with respect to the first blower fan mounting part 20. It is inclined toward the back of the showcase body 3.

  A plate-like partition 22 is provided at an intermediate portion between the two second blower fans 18 in the fan plenum 16. The partition 22 is arranged so as to rectify the cold air blown by the two second blower fans 18 without mixing and to flow through the second blower passage 12.

  In FIG. 2, the solid line arrows indicate the flow of cold air blown by the second blower fan 18, and the broken line arrows indicate the flow of cold air blown by the first blower fan 17.

  FIG. 3 is a cross-sectional side view showing a flow state of the cool air blown by the first and second blower fans 17 and 18. A solid line arrow indicates cool air blown by the second blower fan 18, and a broken arrow indicates cold air blown by the first blower fan 17.

  In such a configuration, when the open showcase 1 is operated, the first blower fan 17, the second blower fan 18, and the third blower fan 19 are driven. When the first blower fan 17 is driven, a cold air flow indicated by a broken arrow in FIG. 1 is generated. Further, when the second blower fan 18 is driven, a cold air flow indicated by a solid arrow in FIG. 1 is generated. Further, when the third blower fan 19 is driven, a cold air flow indicated by a one-dot chain line arrow in FIG. 1 is generated.

  The flow of cold air indicated by these broken arrows, solid arrows, and alternate long and short dash lines forms a three-layer air curtain covering the opening 4 of the showcase body 3, and the display shelf 6 in the display chamber 5 is formed by these air curtains. The goods displayed in the are cooled.

  The flow of cold air in the portion where the fan plenum 16 is installed in the lower part of the showcase body 3 will be described. The fan plenum 16 divides the lower part of the showcase body 3 into a region that becomes a part of the first air passage 11 and a region that becomes a part of the second air passage 12, and the first air fan 17 is driven. Thus, the cold air sucked from the suction port 11b flows into a region of the fan plenum 16 that is a part of the first air passage 11 and is shown in the first air passage 11 as shown by the broken arrow in FIG. It rises through a standing part located on the back side of the main body 3.

  Further, when the second blower fan 18 is driven, the cool air sucked from the suction port 12b is part of the second blower passage 12 partitioned by the fan plenum 16 as shown by solid line arrows in FIG. The second air passage 12 rises through an upright portion located on the back side in the showcase body 3. The cool air rising in the second air passage 12 is cooled by the cooler 15 by passing around the cooler 15 installed in the second air passage 12.

  Here, as shown in FIG. 2, the fan plenum 16 is positioned on both sides of the first blower fan mounting portion 20 to which the first blower fan 17 is mounted and the first blower fan mounting portion 20. Is attached to the second blower fan attachment portion 21. The first blower fan mounting portion 20 extends in a direction parallel to the front surface of the showcase main body 3, and the second blower fan mounting portion 21 is inward with respect to the first blower fan mounting portion 20. It is inclined to. For this reason, the open showcase 1 has a small lateral width dimension, and even if the lateral width dimension of the fan plenum 16 is limited, a fan on which one first blower fan 17 and two second blower fans 18 are mounted. The plenum 16 can be installed in the lower part of the showcase body 3.

  As a result, the flow rate of the cool air blown through the second air passage 12 by the driving of the second blower fan 18 is increased, and the cool air blown from the air outlet 12a is surely delivered to the suction port 12b. The innermost air curtain formed by the coolest cold air among the air curtains can be reliably formed, and the cooling performance of the product in the display chamber 5 can be enhanced.

  Moreover, since the 2nd ventilation fan 18 which generate | occur | produces the flow of cool air in the 2nd ventilation path 12 is located in the both sides of the horizontal width direction of the open showcase 1, the cold air which blows off from the blower outlet 12a and is sucked in from the suction inlet 12b The air flow rate balance of the air curtain formed by the above can be made uniform in the width direction of the open showcase 1, the temperature variation in the display room 5 can be eliminated in the width direction of the open showcase 1, and the display room 5 The cooling performance of the goods inside can be improved.

  Further, when the cool air blown by the second blower fan 18 hits the cooler 15, the contact condition can be made uniform in the width direction of the cooler 15, and frost is generated in a portion where the cool air hits the cooler 15 is bad. Occurrence can be suppressed. For this reason, it becomes difficult to generate | occur | produce frost in the cooler 15, and it can prevent the fall of the cooling performance by generating frost in the cooler 15 and defrosting the generated frost.

  In addition, the fan plenum 16 is provided with a partition 22, and the partition 22 can blow the second air passage 12 in a rectified state without mixing the cool air blown by the two second blower fans 18. it can. Thereby, the cold air which blows off from the blower outlet 12a can be blown out uniformly in the horizontal width direction of the open showcase 1, and the performance which forms a favorable air curtain can be improved.

  Moreover, since the 1st ventilation fan 17 is located in the center part of the horizontal width direction of the open showcase 1, the cold air which blows off from the blower outlet 11a by the drive of the 1st ventilation case 17 is uniform in the horizontal width direction of the open showcase 1 The performance which forms the favorable air curtain by the cold which blows off from the blower outlet 11a and is sucked in from the suction inlet 11b can be improved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, some constituent elements may be deleted from all the constituent elements shown in the above-described embodiments, and the constituent elements according to different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Open showcase 2 Base 3 Showcase main body 4 Opening 5 Display room 6 Display shelf 7 Outer heat insulation wall 8 Inner heat insulation wall 9 Inner surface board 10 Outer surface board 11 1st ventilation path 11a Air outlet 11b Suction port 12 2nd ventilation path 12a Air outlet 12b Air inlet 13 Third air passage 13a Air outlet 14 Air inlet 15 Cooler 16 Fan plenum 17 First air fan 18 Second air fan 19 Third air fan 20 First air fan mounting portion 21 Second air fan mounting Part 22 Partition

Claims (2)

A showcase body having an opening formed in the front and a display chamber formed therein, a first air passage formed along a bottom surface, a back surface, and a top surface of the showcase body, and a bottom surface of the showcase body And a second air passage formed inside the first air passage along the back surface and the upper surface, a cooler installed in the second air passage, and a lower portion of the showcase body. An open showcase comprising a fan plenum equipped with one first blower fan that generates a cold air flow in the first air passage and two second blower fans that generate a cold air flow in the second air passage. In
The fan plenum includes a first blower fan mounting portion to which the first blower fan is mounted, and a second blower fan mounting portion to which the second blower fan is mounted on both sides of the first blower fan mounting portion. The first blower fan mounting portion extends in a direction parallel to the front surface of the showcase body, and the second blower fan mounting portion is inclined inward with respect to the first blower fan mounting portion. The open showcase is characterized in that the cool air blown by the second blower fan is directed around the cooler.   2. The open showcase according to claim 1, wherein the fan plenum is provided with a partition that partitions between the two second blower fans.

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