JP2018117979A - Open Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open showcase having high cooling efficiency.SOLUTION: An open showcase 1 comprises: a cool air circulation passage 7 which stores an evaporator 41 and a blower 42 between an exterior case 22 and an interior case 23 at least whose front face is opened; and a cold insulation chamber 2 in which display shelves 25A, 25B, 25C are arranged in the interior case 23. By cool air which is blown from an air outlet 74 on an upper part of the cool air circulation passage 7 and sucked to a suction port 75 on a lower part, an air curtain is formed on a front face side of the cold insulation chamber 2, and inside of the cold insulation chamber 2 is subjected to cold insulation. The open showcase comprises a plate-shaped member 4 which is erected over a front part of the suction port 75, and a blowing direction of the air outlet 74 is directed to a front side relative to front ends of the display shelves 25A, 25B, 25C and to the plate-shaped member 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an open showcase that is installed in a food department such as a supermarket, a convenience store, or a department store, and is used for displaying commodities such as daily foods and fresh foods.

  The open showcase includes a substantially U-shaped outer case having an opening on the front surface and an inner case provided inside the outer case, and a plurality of upper and lower display shelves inside the inner case And a cold air circulation passage is formed between the inner case and the outer case, and an evaporator and a blower constituting a cooling unit for performing a refrigeration cycle are formed in the cold air circulation passage. It is arranged. In addition, an air outlet for the cold air circulation passage is formed between the upper front end of the inner case at the lower edge of the front end of the top plate that constitutes the upper portion of the outer case and extends forward from the back side, and constitutes the lower portion of the outer case. A suction port of the cold air circulation passage is formed between the lower front end of the inner case at the upper edge of the front end of the bottom plate extending forward from the back side (see Patent Document 1).

  In such an open showcase, the air (cold air) in the cold air circulation passage cooled by the evaporator by operating the blower is blown out from the outlet formed in the upper portion of the outer case, and then the outer case. It is sucked into the suction port formed at the bottom of the. In this way, the cool air is circulated in the cool air circulation passage, and the air curtain is formed on the front side of the cold insulation chamber by the circulating cold air, so that the products displayed in the cold insulation chamber can be kept cold. .

Japanese Patent Laid-Open No. 11-257830 (page 4, FIG. 2)

  However, in Patent Document 1, the top plate of the outer case is configured to be shorter in the front-rear direction than the uppermost display shelf provided in the cold storage chamber, and is formed in the cool air circulation passage formed at the lower edge of the front end of the top plate. The blowout direction of the air outlet is directed to the upper surface near the front end of the uppermost display shelf. The cold air blown from the air outlet hits the upper surface near the front end of the uppermost display shelf, and then goes downward from the front end of the uppermost display shelf and is sucked into the suction port formed at the lower part of the outer case The air curtain formed on the front side of the cold insulation chamber becomes unstable and the cold air leaks to the outside from the opening on the front side of the cold insulation chamber. There was a problem that the cooling efficiency of the open showcase was lowered due to the reduced amount of cold air sucked.

  The present invention has been made paying attention to such problems, and an object thereof is to provide an open showcase with high cooling efficiency.

In order to solve the above problems, the open showcase of the present invention is:
A cool air circulation passage that accommodates an evaporator and a blower between at least an outer case and an inner case that are open at the front, and a cold insulation chamber that is provided with a display shelf in the inner case, and An open showcase in which an air curtain is formed on the front side of the cold insulation chamber by the cold air blown out from the upper air outlet of the cold air circulation passage and sucked into the lower air inlet, and the cold insulation chamber is kept cold,
Comprising a plate-like member standing over the front of the inlet;
The blow-out direction of the blow-out port is characterized by being forward of the front end of the display shelf and toward the plate member.
According to this feature, the cold air blown out from the outlet is less likely to hit the display shelf, and is a plate-like member standing over the front of the suction port in a state where the flow rate is substantially maintained in the blowing direction. Since it is received, the cool air can be guided to the lower suction port while preventing the cool air from leaking out from the open portion on the front side of the cold room. For this reason, it is possible to stably form an air curtain on the front surface side of the cold insulation chamber, and to secure a sufficient amount of cold air at the suction port to enhance cooling efficiency.

The air outlet includes an inner plate whose front end faces the front side from the front end of the display shelf, and an outer plate whose front end faces the lower side than the upper end of the plate-like member.
According to this feature, the cool air is blown out from between the inner plate and the outer plate constituting the air outlet, so that the inner plate guides the front of the front end of the display shelf so that the cold air does not hit the display shelf, and the outer plate. Therefore, the air curtain can be stably formed on the front side of the cold storage chamber because the air is guided downward from the upper end of the plate-like member so that the cold air does not leak out from the open portion on the front side of the cold storage chamber. it can.

The cold air circulation passage includes an upper-side passage connected to the upstream side of the air outlet and extending in a substantially horizontal direction,
The air outlet has a passage width smaller than that of the upper side passage.
According to this feature, the flow rate of the cool air blown out from the blowout port can be increased by flowing the cold air into the blowout port having a passage width smaller than that of the upper side passage and blowing out the air. Most of the air is sucked into the suction port without hitting the display shelf, and the air curtain can be more stably formed on the front side of the cold storage chamber.

An air conditioning member is provided in the upper side passage.
According to this feature, the cold air can be spread substantially uniformly on the downstream side of the air conditioning member by allowing the air to pass through the air conditioning member provided in the upper-side passage in the cold air circulation passage. Cold air can be blown out substantially uniformly, and the air curtain can be formed substantially uniformly over the front side of the cold insulation chamber.

The cold air circulation passage includes a back side passage that is connected to an upstream side of the upper side passage and extends in the vertical direction,
The upper side passage has a smaller passage width than the back side passage.
According to this feature, the cold air flows into the upper side passage having a smaller passage width than the immediately preceding back side passage, thereby increasing the flow rate of the cold air when passing through the air conditioning member provided in the upper side passage. Since the resistance can be increased, it is easy to spread the cold air substantially uniformly on the downstream side of the air conditioning member.

A side plate having a front edge extending from the outlet to the upper end of the plate-like member is provided on the side of the cold insulation chamber.
According to this feature, the cold air blown out from the outlet can be stored in the space in the cold insulation room defined by the front plate-like member and the side plates on the side, so that the cold air from the side of the cold insulation room to the outside Leakage can be suppressed and cooling efficiency can be increased.

It is a perspective view which shows the open showcase in an Example. It is sectional drawing of the side view which shows the structure of an open showcase, and the flow of the cold air in a cold air circulation channel | path. It is sectional drawing of the side view which shows the structure and dimensional relationship of an open showcase, and an enlarged view of the blower outlet vicinity. (A) is a side view which shows the structure of an upstream air-conditioning member, (b) is a top view which similarly shows the structure of an upstream air-conditioning member. (A) is a side view which shows the structure of a downstream air conditioning member, (b) is a front view which similarly shows the structure of a downstream air conditioning member.

  EMBODIMENT OF THE INVENTION The form for implementing the open showcase which concerns on this invention is demonstrated below based on an Example.

  The open showcase according to the embodiment will be described with reference to FIGS. Hereinafter, the left side of FIG. 2 is the front side (front side) of the open showcase, and description will be made with reference to the vertical and horizontal directions when viewed from the front side.

  The open showcase 1 according to the present embodiment is installed to display products such as foods in a cooled state in a supermarket, a convenience store or the like. As shown in FIG. 1, the open showcase 1 is mainly composed of a case body 21 that is provided above and cools and stores a product (not shown), and a base 3 that is provided below the case body 21. And a refrigerator unit (not shown) (compressor, condenser, blower, etc.) separately provided outside the open showcase 1 and an evaporator 41 and a blower 42 (see FIG. 2) housed in a cold air circulation passage 7 described later. ) Is connected to each other by a refrigerant pipe, and is a separate type showcase capable of cooling the inside of the cold insulation chamber 2 defined in the case body 21.

  As shown in FIG. 2, the open showcase 1 includes an outer case 22 having a substantially U-shaped structure whose front side is open, and an inner case 23 having a substantially U shape whose front side is also opened inside. , And a cold insulation chamber 2 is formed in the space inside the inner case 23. The case body 21 has a structure in which the lower portion 21b extends forward from the upper portion 21a.

  The cold insulation chamber 2 includes a back plate 23a of the inner case 23, an upper portion 21a of the case main body 21 (top plate 23c of the inner case 23), a lower portion 21b of the case main body 21 (bottom portion 23b of the inner case), and side walls 5 and 5 (panel body). 50, 50) and the plate-like member 4, and the front side is open. The open part on the front side of the cold chamber 2 is formed by the front end of the canopy 6, the front ends of the side walls 5, 5 (panel bodies 50, 50), and the upper end of the plate-like member 4.

  Specifically, as shown in FIGS. 1 and 2, side walls 5 and 5 having a substantially L-shaped structure extending from the upper part 21 a to the lower part 21 b of the case body 21 are attached to the left and right sides of the case body 21. It has been. Further, the side walls 5 and 5 are provided with panel members 50 and 50 (side plates) having translucency so as to block open portions on both the left and right sides of the cold insulation chamber 2 formed in the inner space of the inner case 23, respectively. It is attached (see FIG. 1). In addition, the panel bodies 50 and 50 are comprised from the glass plate, the acrylic board, etc. which improved the heat insulation by forming a multilayer structure.

  Further, a canopy 6 for attaching a lighting fixture or the like for illuminating the inside of the cold insulation chamber 2 is provided at the front end of the upper portion 21a of the case body 21. The canopy 6 is provided between the side walls 5 and 5 attached to the left and right side portions of the case body 21, and the aesthetic appearance is enhanced by aligning the upper front end 5 a of the side walls 5 and 5 and the side view shape of the front side of the canopy 6. It has been.

  Further, a plate-like member 4 extending in the left-right direction is erected substantially vertically at the front end of the lower portion 21b of the case main body 21 in front of a suction port 75 described later at the upper edge of the front end portion of the lower portion 21b of the case main body 21. ing. The plate-like member 4 has an enhanced aesthetic appearance because the upper ends of the lower ends 5b, 5b of the side walls 5, 5 attached to the left and right sides of the case body 21 are aligned. The plate-like member 4 is made of a material such as a translucent glass plate or an acrylic plate. Further, the structural strength of the plate-like member 4 is enhanced by attaching a U-shaped metal cover member 40 that is downwardly viewed in cross section across the left-right direction at the upper end portion of the plate-like member 4.

  2, rear ends of brackets 24A, 24B, 24C extending in the front-rear direction are attached to the back plate 23a of the inner case 23 constituting the cold insulation chamber 2, and the brackets 24A, 24B, 24C are attached to the brackets 24A, 24B, 24C. Shelf plates 25A, 25B, and 25C (display shelves) are attached from above. As a result, in the cold room 2, products can be displayed on the top surfaces of the shelf plates 25 </ b> A, 25 </ b> B, 25 </ b> C and the bottom plate 26 provided on the bottom 23 b of the inner case 23. The brackets 24A, 24B, and 24C and the shelf boards 25A, 25B, and 25C are configured such that the dimensions in the front-rear direction become longer as they become lower.

  Further, rail members 27, 27, 27 extending in the left-right direction are provided at the front ends of the shelf boards 25A, 25B, 25C, and the rail members 27, 27, 27 have, for example, product information such as product names and prices. In order to increase the appeal of the product to the price card and the customer, a sales promotion POP or the like can be attached at an arbitrary position. Further, plate-like fall prevention members 28, 28, 28 extending in the left-right direction are provided between the front ends of the shelf boards 25A, 25B, 25C and the rail members 27, 27, 27 described above. The product is prevented from dropping from the front ends of the plates 25A, 25B, and 25C.

  In the following description, the front ends of 25A, 25B, and 25C (display shelves) in this embodiment indicate a structure including rail members 27, 27, and 27 and fall prevention members 28, 28, and 28.

  As shown in FIG. 2, the case main body 21 is formed with a cold air circulation passage 7 having a substantially U-shape between the outer case 22 and the inner case 23. The cold air circulation passage 7 includes a lower-side passage 71 extending in the front-rear direction inside the lower portion 21 b of the case body 21, and a rear-side passage 72 communicating with the lower-side passage 71 and extending vertically in the rear side of the case body 21. An upper side passage 73 that communicates with the back side passage 72 and extends in the front-rear direction inside the upper portion 21a of the case body 21, and is obliquely forward from the lower edge of the front end of the upper portion 21a that communicates with the upper side passage 73. The blower outlet 74 extends downward and opens, and the suction opening 75 that opens upward and communicates with the lower-side passage 71 at the upper edge of the front end of the lower portion 21 b of the case main body 21. In the cold air circulation passage 7, the lower side passage 71, the rear side passage 72, the upper side passage 73, the air outlet 74, and the suction port 75 are formed to have substantially the same lateral dimensions.

  As shown in FIG. 2, the lower passage 71 is formed between the bottom 23b of the inner case 23 and the bottom 22b of the outer case 22 constituting the lower portion 21b of the case body 21, and extends in the front-rear direction. The case main body 21 communicates with the back side passage 72 on the back side. Further, in the lower side passage 71, there are disposed an evaporator 41 that performs heat exchange by a refrigeration cycle using a refrigerant and cools the surrounding air, and a blower 42 that sends out air (cold air) in the lower side passage 71. Has been.

  In the open showcase 1, by operating the blower 42 disposed in the lower side passage 71 constituting the upstream side of the cold air circulation passage 7, the cold air cooled by the evaporator 41 is downstream of the rear side. The air is blown out from the upper air outlet 74 through the side passage 72 and the upper side passage 73, and the cold air in the cold insulation chamber 2 is sucked into the lower side passage 71 from the suction port 75.

  According to this, an air curtain is formed by the airflow of the cool air in the open portion on the front side of the cool chamber 2, and a part of the cool air flows into the cool chamber 2, thereby cooling the inside of the cool chamber 2. Can be maintained. Further, the cold air sucked from the suction port 75 flows into the lower side passage 71 and is sent again to the evaporator 41 by the blower 42 so that the cold air circulates efficiently through the cold air circulation passage 7. ing.

  2, the back side passage 72 is formed between the back plate 23a of the inner case 23 and the back plate 22a of the outer case 22 that constitute the back side of the case body 21, and is formed in the vertical direction. It extends and communicates with the lower passage 71 at the lower portion 21 b of the case body 21 and with the upper passage 73 at the upper portion 21 a of the case body 21. In addition, an upstream air conditioning member 76 is disposed in the rear side passage 72 at a substantially central position in the vertical direction.

  As shown in FIG. 4 (a), the upstream side air conditioning member 76 is formed into a crank shape in sectional view by bending a metal plate material, and mounting portions 76a and 76a formed at the bent portions at both ends. And an air conditioning portion 76b formed between the attachment portions 76a and 76a, and the air conditioning portion 76b is provided with a plurality of ventilation holes 76c, 76c,... (See FIG. 4B). . As shown in FIG. 4 (b), on the front side (upper side in FIG. 4) of the air conditioning section 76b, it is provided in the back plate 23a and the back side passage 72 of the inner case 23 constituting the back side passage 72. Cutout portions are formed in accordance with the shapes of various members such as electric wiring (not shown).

  As shown in FIG. 2, the upstream side air conditioning member 76 includes the outer case 22 and the inner case 23 in a state where one of the mounting portions 76 a and 76 a is fixed to the back plate 23 a of the inner case 23 or the back plate 22 a of the outer case 22. Can be arranged in a substantially horizontal state over the front-rear direction of the back side passage 72. At this time, the air conditioning unit 76b is arranged in a state substantially orthogonal to the cool air flow in the rear side passage 72, thereby functioning as a resistance to the cool air flow and via the ventilation holes 76c, 76c,. Since the cool air can be passed to the downstream side, the cool air that has passed through the air conditioning section 76b is substantially uniform in the front-rear direction and the left-right direction on the upper side of the rear side passage 72 (downstream side of the upstream air conditioning member 76). It is easy to spread.

  As shown in FIG. 2, the upper-side passage 73 is formed between the top plate 23 c of the inner case 23 and the top plate 22 c of the outer case 22 constituting the upper portion 21 a of the case body 21, and is substantially horizontal. It extends in the (front-rear direction) and communicates with the rear-side passage 72 on the rear side and the air outlet 74 on the front side. Further, in the upper side passage 73, a downstream air conditioning member 77 is disposed at a position on the front side (air outlet 74 side).

  As shown in FIG. 5 (a), the downstream side air conditioning member 77 is formed into a crank shape in sectional view by bending a metal plate material, and is formed at the bent portions at both ends. And an air conditioning portion 77b formed between the attachment portions 77a and 77a, and the air conditioning portion 77b is provided with a plurality of ventilation holes 77c, 77c,... (See FIG. 5B).

  As shown in FIG. 2, the downstream side air conditioning member 77 has the outer case 22 and the inner case 23 in a state where one of the attachment portions 77 a and 77 a is fixed to the top plate 23 c of the inner case 23 or the top plate 22 c of the outer case 22. By combining these, the upper side passage 73 can be arranged in a substantially vertical state over the vertical direction. At this time, the air conditioning unit 77b is arranged in a state substantially orthogonal to the cold air flow (see FIG. 2) in the upper-side passage 73, thereby functioning as a resistance to the cold air flow and the ventilation holes 77c, 77c, Since the cool air can be passed through the downstream side through the cool air that has passed through the air conditioning portion 77b, the cold air extends in the vertical direction and the horizontal direction on the front surface side of the upper side passage 73 (downstream side of the downstream air conditioning member 77). It is easy to spread almost uniformly.

  As shown in the enlarged portion of FIGS. 2 and 3, the air outlet 74 is inclined forward and downward from the front end of the top plate 23 c of the inner case 23 in the left-right direction at the lower edge of the front end of the upper portion 21 a of the case body 21. It is formed between the front and rear of the extending inner plate 23d and the outer plate 22d extending substantially parallel to the inner plate 23d in the diagonally forward direction from the front end of the top plate 22c of the outer case 22 and opens obliquely forward and downward. ing. In addition, since the honeycomb structure for wind regulation etc. is not provided between the inner board 23d and the outer board 22d which comprise the blower outlet 74, the beauty of the blower outlet 74 when it sees from the front side is provided. Has been enhanced.

  Moreover, the blower outlet 74 is formed in the position below the length dimension of the front-back direction of the uppermost shelf 25A in the cold storage chamber 2, and more than half the length dimension of the front-back direction.

  As shown by the extension line E1 in FIG. 3, the front end of the inner plate 23d is ahead of the front ends of the shelf plates 25A, 25B, and 25C (the rail members 27, 27, 27 and the fall prevention members 28, 28, 28). It is configured to face. Further, the front end portion of the inner plate 23d is bent toward the cold insulation chamber 2 side (rear side), so that cold air blown out on the rear side (inner plate 23d side) of the air outlet 74 hardly occurs. Yes.

  As shown by the extension line E2 in FIG. 3, the outer plate 22d has a front end positioned below the upper end of the plate-like member 4 standing on the front end of the lower portion 21b of the case body 21 (in front of the suction port 75). It is configured to face.

  Further, the air outlet 74 is formed at a position deeper on the back side than the front end of the canopy 6 provided at the front end of the upper portion 21 a of the case body 21. According to this, by arrange | positioning the canopy 6 in the front side of the blower outlet 74, the cold air blown in on the front side (outer plate 22d side) of the blower outlet 74 becomes difficult to occur. Further, when viewed from the front side, the canopy 6 makes it difficult to see the air outlet 74, and the beauty of the vicinity of the air outlet 74 is enhanced.

  As shown in FIG. 2, the suction port 75 opens upward in the left-right direction on the back side (cold storage chamber 2 side) and the lower side of the plate-like member 4 at the upper edge of the front end of the lower portion 21 b of the case body 21. The lower side passage 71 is in communication. Note that a suction port cover 78 provided with a plurality of slits and holes is attached to the suction port 75.

  As described above, in the open showcase 1 of the present invention, the plate-like member 4 is erected on the front side of the suction port 75 in the left-right direction, and the outlet direction of the outlet port 74 is the shelf plates 25A, 25B, 25C. Therefore, the cool air blown out from the air outlet 74 is less likely to hit the shelf plates 25A, 25B, and 25C, and the flow velocity is substantially maintained in the air blowing direction. In this state, the plate-like member 4 standing in the left-right direction on the front side of the suction port 75 is received by the lower suction port 75 while preventing leakage from the open portion on the front surface side of the cold chamber 2 to the outside. Can guide the cold. According to this, since an air curtain can be stably formed in the front side of the cool chamber 2, and the amount of cool air sucked in the suction port 75 can be secured, the cooling efficiency of the open showcase 1 is increased. be able to.

  Moreover, it is comprised so that the front end of the inner board 23d which comprises the blower outlet 74 may face the front side rather than the front end of shelf board 25A, 25B, 25C (rail member 27,27,27 and fall prevention member 28,28,28). Since the front end of the outer plate 22d is configured to face the lower side than the upper end of the plate-like member 4, the cool air is blown out from the space between the inner plate 23d and the outer plate 22d at the outlet 74. Cold air is guided in front of the front ends of the shelves 25A, 25B, and 25C so as not to hit the shelves 25A, 25B, and 25C by the inner plate 23d, and from the open part on the front side of the cool chamber 2 to the outside by the outer plate 22d. Since the cold air is guided below the upper end of the plate-like member 4 so as not to leak out, the air curtain can be stably formed on the front side of the cold insulation chamber 2.

  Further, in the cold room 2, convection is performed on the upper surface side of the shelf plates 25 </ b> A, 25 </ b> B, 25 </ b> C, and the air is decelerated depending on the cool air flowing downward from the front ends of the shelf plates 25 </ b> A, 25 </ b> B, 25 </ b> C. The cold air diffusing at the lower side is also received by the plate-like member 4 at the front side of the suction port 75, so that it is guided to the lower suction port 75 while preventing leakage from the open part on the front side of the cold insulation chamber 2 to the outside. can do.

  Further, as shown in FIG. 3, the passage width L1 between the outer plate 22d and the inner plate 23d constituting the air outlet 74 in the cool air circulation passage 7 (see the enlarged portion in FIG. 3) is the upper side passage 73. Is smaller than the passage width L2 between the top plate 22c of the outer case 22 and the top plate 23c of the inner case 23 (see the enlarged portion in FIG. 3). The cross-sectional area is smaller than the passage 73. According to this, since the cold air flows into the air outlet 74 having a passage width smaller than that of the upper side passage 73 and is blown out, the flow rate of the cold air blown out from the air outlet 74 can be increased. Most of the cool air is sucked into the suction port 75 without hitting the shelf plates 25A, 25B, and 25C, and the air curtain can be more stably formed on the front side of the cold insulation chamber 2.

  Further, the passage width L2 between the top plate 22c of the outer case 22 constituting the upper side passage 73 and the top plate 23c of the inner case 23 in the cold air circulation passage 7 is equal to that of the inner case 23 constituting the back side passage 72. It is smaller than the passage width L3 between the back plate 23a and the back plate 22a of the outer case 22, in other words, the upper side passage 73 has a smaller cross-sectional area than the back side passage 72. According to this, when the cool air flows into the upper side passage 73 whose passage width is smaller than that of the rear side passage 72, the flow rate of the cold air passing through the air conditioning portion 77b of the downstream side air conditioning member 77 provided in the upper side passage 73 is reduced. The resistance when passing can be increased. Furthermore, since the cold air circulation passage 7 has a configuration in which the passage width decreases toward the blowout port 74 (L1 <L2 <L3), the flow rate of the cold air passing through the cold air circulation passage 7 can be gradually increased.

  Further, as shown in FIG. 4B, the ventilation holes 76c, 76c,... Provided in the air conditioning section 76b of the upstream air conditioning member 76 have a round hole shape. The cold air that has passed through the air conditioning portion 76b of the upstream air conditioning member 76 in the rear passage 72 having a large passage width is in the front-rear direction and the lateral direction on the upper side of the rear air passage 72 (downstream of the upstream air conditioning member 76). It is easy to spread almost uniformly.

  Further, as shown in FIG. 5 (b), the ventilation holes 77c, 77c,... Provided in the air conditioning section 77b of the downstream air conditioning member 77 have a shape of a long hole that is long in the left-right direction. The cold air that has passed through the air conditioning portion 77b of the downstream air conditioning member 77 in the upper air passage 73 having a passage width smaller than the back surface air passage 72 is on the front side of the upper air passage 73 (downstream of the downstream air conditioning member 77). In particular, it is easy to spread substantially uniformly in the left-right direction. According to this, the cold air can be blown out substantially uniformly over the air outlet 74 by passing the downstream air conditioning member 77 and spreading the air substantially uniformly just before the air outlet 74 in the upper side passage 73. Therefore, the air curtain can be formed substantially uniformly in the left-right direction on the front side of the cold insulation chamber 2.

  Further, as shown in FIG. 2, the front edges of the panel bodies 50, 50 provided so as to close both the left and right sides of the cold insulation chamber 2 extend from the upper side to the upper end of the plate-like member 4 from the air outlet 74. It is configured. According to this, the cold air (air curtain) blown out from the air outlet 74 can be stored in the space in the cold insulation chamber 2 defined by the front plate-like member 4 and the left and right side panel bodies 50, 50. Further, it is possible to suppress the leakage of cold air from the front side and both the left and right sides of the cold insulation chamber 2 to the outside, and the cooling efficiency of the open showcase 1 can be increased.

  Further, the height position of the lowermost shelf plate 25 </ b> C in the cold chamber 2 is substantially the same as the height position of the upper end of the plate-like member 4. According to this, while being able to make it convect between the upper and lower sides of the bottom shelf board 25C in the cold storage chamber 2 and the bottom plate 26 provided in the bottom 23b of the inner case 23, the front side of the cold storage chamber 2 is connected to the outside. Since the leakage of the cold air can be suppressed by the plate-like member 4, the amount of cold air sucked in the suction port 75 can be secured.

  Further, as shown in FIG. 3, the front-rear dimension L4 of the suction port 75 is configured to be larger than the passage width L1 between the outer plate 22d and the inner plate 23d constituting the air outlet 74, so When passing through the downstream side air conditioning member 77 and the upstream side air conditioning member 76 in the circulation passage 7, resistance to the flow of cold air flows from the rear side passage 72 to the upper side passage 73 or from the upper side passage 73 to the outlet 74. Even if it occurs, it is possible to maintain a balance between the amount of cool air sucked in the suction port 75 and the amount of cool air blown out in the air outlet 74.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, in the cold air circulation passage 7, the upper side passage 73 is described as having a smaller passage width than the rear side passage 72. However, the present invention is not limited to this. As long as the passage width of the outlet is smaller than the passage width of the upper side passage, for example, the passage width of the rear side passage and the passage width of the upper side passage may be substantially the same. Moreover, the passage width of the back side passage may be configured to be smaller than the passage width of the upper side passage.

  In the above-described embodiment, the mode in which the upper end of the plate-like member 4 is configured at the same height as the lower upper ends 5b and 5b of the side walls 5 and 5 is described. As long as the cold air blown out from the outlet 74 can be received and the leakage of the cold air from the front side of the cold insulation chamber 2 to the outside can be suppressed, the height dimension may be freely configured.

  Further, the inner plate 23d and the outer plate 22d constituting the air outlet 74 may be formed integrally with the top plate 23c of the inner case 23 and the front end of the top plate 22c of the outer case 22, respectively. The body inner plate and the outer plate may be attached to the front ends of the top plate 23c of the inner case 23 and the top plate 22c of the outer case 22, respectively. Furthermore, the inner plate and the outer plate may be integrally formed.

  Moreover, the panel bodies 50 and 50 may not have translucency, and may be a metal plate material provided with a heat insulation structure. Further, the panel bodies 50, 50 may not be provided, and the front ends of the side walls 5, 5 may extend from the upper side to the upper end of the plate-like member 4 from the blower outlet 74.

  Further, the shape of the ventilation holes 77c, 77c,... Provided in the air conditioning part 77b of the downstream side air conditioning member 77 and the ventilation holes 76c, 76c,. Any shape can be used as long as the shape can be spread almost uniformly on the side.

  Further, by providing a through hole in the back plate 23 a of the inner case 23, a part of the cool air in the back side passage 72 may be introduced into the cold insulation chamber 2.

  Further, the open showcase may have an open portion on the left and right side surfaces in addition to the front surface side of the cold insulation chamber 2.

DESCRIPTION OF SYMBOLS 1 Open showcase 2 Cold storage chamber 3 Base 4 Plate-like member 5 Side wall 6 Canopy 7 Cold air circulation passage 21 Case main body 22 Outer case 22d Outer plate 23 Inner case 23d Inner plates 25A-25C Shelves (display shelf)
41 Evaporator 42 Blower 50 Panel body (side plate)
71 Lower side passage 72 Back side passage 73 Upper side passage 74 Air outlet 75 Suction port 76 Upstream side air conditioning member 77 Downstream side air conditioning member E1, E2 Virtual extension lines L1-L3 Path width

Claims (6)

A cool air circulation passage that accommodates an evaporator and a blower between at least an outer case and an inner case that are open at the front, and a cold insulation chamber that is provided with a display shelf in the inner case, and An open showcase in which an air curtain is formed on the front side of the cold insulation chamber by the cold air blown out from the upper air outlet of the cold air circulation passage and sucked into the lower air inlet, and the cold insulation chamber is kept cold,
Comprising a plate-like member standing over the front of the inlet;
The opening direction of the said blower outlet is ahead of the front end of the said display shelf, and is toward the said plate-shaped member, The open showcase characterized by the above-mentioned.   The said blower outlet is provided with the inner plate which a front end faces the front side rather than the front end of the said display shelf, and the outer plate where a front end faces a lower side rather than the upper end of the said plate-shaped member. Open showcase described in. The cold air circulation passage includes an upper-side passage connected to the upstream side of the air outlet and extending in a substantially horizontal direction,
The open showcase according to claim 1 or 2, wherein the air outlet has a passage width smaller than that of the upper side passage.   The open showcase according to claim 3, wherein an air conditioning member is provided in the upper side passage. The cold air circulation passage includes a back side passage that is connected to an upstream side of the upper side passage and extends in the vertical direction,
The open showcase according to claim 3 or 4, wherein the upper-side passage has a passage width smaller than that of the back-side passage.   6. The open showcase according to claim 1, wherein a side plate having a front edge extending from the air outlet to an upper end of the plate-like member is provided on a side of the cold insulation chamber. .

Images