JP6344716B2 - Open showcase - Google Patents

Description

  The present invention relates to an open showcase in which a cold air curtain is formed in an opening of a display chamber.

  Conventionally, this type of open showcase has been provided to display and sell products while refrigerated or refrigerated in the display room. It is open. In order for outside air to enter from this opening and deteriorate the cooling performance in the display room, an outlet and a suction port are formed at one end and the other end of the opening, and the opening is made by blowing cool air from the outlet toward the suction port. A cold air curtain was formed.

  Here, a honeycomb rectifier is usually attached to the air outlet, and it is configured so that cool air is uniformly blown out from the air outlet. Arise. That is, the cold air itself blown from the honeycomb rectifier to form a cold air curtain in the opening is a uniform and less turbulent flow, but a vortex is generated by coming into contact with the outside air immediately after coming out of the air outlet. . As this vortex develops and moves along the flow of cold air, as a result, mixing of the outside air proceeds toward the downstream side of the cold air, resulting in a decrease in flow velocity and an increase in temperature.

  Such a disturbance of the cool air curtain raises the temperature in the display chamber and causes the cooling performance to deteriorate. Therefore, conventionally, measures have been taken to suppress the turbulence of the cool air by attaching a guide protruding to the suction port side continuously to the air outlet, or by attaching a guide to the tip of a shelf installed in the display room (for example, (See Patent Document 1 and Patent Document 2).

JP-A-8-320176 JP 2013-153950 A

  However, even if the guide is continuously provided at the outlet, as soon as the cold air passing through the guide contacts the stationary outside air, a vortex is generated and the cold air curtain is disturbed. In addition, the measure for attaching the guide to the tip of the shelf has a drawback that the guide interferes with the delivery of the product and reduces the sales effect.

  The present invention has been made to solve the conventional technical problems, and an object thereof is to provide an open showcase that effectively suppresses the disturbance of the cold air curtain.

In order to solve the above-mentioned problems, an open showcase of the present invention includes an air outlet formed at one end of an opening of a display chamber and a suction port formed at the other end of the opening, and is directed from the air outlet toward the suction port. A cold air curtain is formed in the opening by blowing out the cold air, and is located in a region where the cold air blown out from the blower outlet flows and spaced from the outer end of the blower outlet in the cold air blowing direction. The cool air guide is configured by a plate-like member having a width substantially equal to the width in the longitudinal direction of the air outlet.

The open showcase of the present invention comprises an air outlet formed at one end of the opening of the display chamber and a suction port formed at the other end of the opening, and blows cold air from the air outlet toward the suction port, thereby opening the opening. A cold air curtain is formed, and the honeycomb rectifying body attached to the outlet and the region where the cold air discharged from the honeycomb rectifying body flows, are separated from the honeycomb rectifying body in the cold air blowing direction. The cool air guide is provided at the position, and the cool air guide is constituted by a plate-like member having a width substantially equal to the width in the longitudinal direction of the honeycomb rectifier.

In the open showcase of the present invention, when the width from the outer end to the inner end of the air outlet in each of the above inventions is W, the distance from the outer end of the air outlet to the position of the cold air guide is ½ W or less. It is characterized by setting.

The open showcase of the present invention is 1/5 W ≦ H where the distance from the outlet or the honeycomb rectifier to the cold air guide is H and the width from the outer end to the inner end of the outlet is W in the above inventions. It is characterized by being set to ≦ 1 / 2W.

The open showcase of the present invention is characterized in that in each of the above inventions, a cross section of the cold air guide cut along a plane perpendicular to the longitudinal direction has a symmetrical wing shape.

The open showcase of the present invention is characterized in that, in each of the above inventions, the cold air guide is made of a transparent material.

  According to the present invention, it is provided with the air outlet formed at one end of the opening of the display chamber and the suction port formed at the other end of the opening, and the cool air is blown out from the air outlet toward the suction port. In an open showcase formed with a curtain, the cool air blown out from the air outlet flows in an area where the air flows and is separated from the outer end of the air outlet or the honeycomb rectifier attached to the air outlet in the cold air outlet direction. A cold air guide was provided at the position, and the cold air guide was constituted by a plate-like member having a width substantially equal to the width in the longitudinal direction of the air outlet.

  The cold air that has come out of the air outlet of the open showcase attracts the outside air from the point of contact with the outside air, and generates a flow in the direction along the cold air curtain. Due to the attraction of the outside air, a vortex is likely to be generated in the cold air curtain. In the present invention, the vortex is generated, that is, the outer end of the outlet or the position spaced away from the honeycomb rectifier in the blowing direction. Further, since the cold air guide is provided, the development of the vortex can be suppressed by the cold air guide.

  As a result, a flow velocity distribution along the cold air curtain is formed and mixing with the outside air due to the disturbance of the cold air curtain is suppressed, so that the cooling effect in the display chamber can be remarkably improved.

In this case, when the width of up to the inner end is W from the outer end of the blow outlet, the distance from the outer end of those該吹outlet to a position of the cool air guide, by setting the following 1 / 2W, and the cooling air curtain Mixing with outside air can be more effectively suppressed.

Further, when the width of the spray outlet or honeycomb rectifying body distance cold air guide is separated H, to the inner end from the outer end of the air outlet and is W, by setting a 1 / 5W ≦ H ≦ 1 / 2W, While effectively suppressing the development of the vortex, the inconvenience that the cold air guide interferes with the delivery of the product can be solved.

In particular, the cross section taken along a plane perpendicular to the cold air guide in the longitudinal direction, by a symmetrical wing smoothly cool air flows along the front surface and the outer surface of the cool air guide, effectively suppressing the development of vortices Can do.

In addition, the cold care guide, by forming of a transparent material, but also eliminates an adverse effect on the commodity display effect in the display chamber.

It is a vertical side view of the open showcase of one Example to which this invention is applied. It is a general | schematic expanded sectional view of the blower outlet part of the open showcase of FIG. It is a vertical side view of the cold air guide of the open showcase of FIG. It is a schematic diagram explaining the vortex development suppression effect by the cold air guide of FIG. It is a figure which shows the flow-velocity distribution of the cold air curtain in the open showcase of FIG. It is a figure which shows the flow-velocity distribution of the cold air curtain of the open showcase of FIG. 1 when not providing a cold air guide. It is a figure which shows the flow-velocity distribution of the cold air curtain of the open showcase of FIG. 1 at the time of attaching a cold air guide to a blower outlet continuously. It is a figure which shows the internal temperature distribution of the open showcase of FIG. It is a figure which shows the internal temperature distribution of the open showcase of FIG. 1 when not providing a cold air guide. It is a figure which shows the internal temperature distribution of the open showcase of FIG. 1 at the time of attaching a cold air guide to a blower outlet continuously. It is a figure which shows the relationship between the distance (interval) H between the blower outlet outer end of the open showcase of FIG. 1, and a cold air guide, and the display room average temperature when the flow velocity of a cold air curtain is 1.2 m / s. It is a figure which shows the relationship between the distance (space | interval) H between the blower outlet outer end of the open showcase of FIG. 1, and a cold air guide, and the display room average temperature when the flow velocity of a cold air curtain is 1.9 m / s. It is a figure which shows the relationship between the distance (interval) H between the blower outlet outer end of the open showcase of FIG. 1, and a cold air guide, and the display room average temperature when the flow velocity of a cold air curtain is 0.9 m / s.

  Hereinafter, embodiments of the present invention will be described in detail. The open showcase 1 of an Example is a showcase which has an opening in the front surface installed in stores, such as a convenience store and a supermarket. In this open showcase 1, a main body 2 is constituted by a heat insulating wall 3 having a substantially U-shaped cross section that opens to the front surface, and side plates 4 and 4 attached to both sides thereof. A back panel 6 and a top panel 7 are disposed on the back and top surfaces of the inside of the heat insulating wall 3 with a space therebetween, and the back panel 6 and the top panel 7 and the heat insulating wall 3 are spaced from the back. A rear duct 9 extending upward is formed.

  In addition, a deck pan 10 extending forward is provided at the lower end of the back panel 6, and a display chamber 11 is formed inside the back panel 6, the top panel 7, and the deck pan 10. In the display room 11, shelves 12 for displaying products are constructed in a plurality of stages (three stages in FIG. 1 and four stages in FIGS. 5 to 10). A lower duct 14 communicating with the rear duct 9 and constituting a part thereof is formed below the deck pan 10.

  An air outlet (cold air outlet) 16 is formed at the upper edge (one end) of the front opening 13 of the display chamber 11, and an air inlet (cold air inlet) 17 at the lower edge (other end) of the opening 13. Is formed. The upper end of the rear duct 9 communicates with the air outlet 16, and the front end of the lower duct 14 communicates with the suction port 17. A honeycomb rectifier 18 is attached in the outlet 16. Further, a blower 19 for circulating cold air is disposed in the lower duct 14 below the deck pan 10, and a refrigeration cycle is configured in the rear duct 9 behind the display chamber 11 together with a compressor 26 and a condenser 27 described later. An evaporator 15 is provided vertically.

  On the other hand, a machine room 25 is formed below the heat insulating wall 3, and a compressor 26, a condenser 27, a condenser blower 28, and the like are installed in the machine room 25, as well as a power source and a control. An electrical box (not shown) that houses the substrate is also provided. When the compressor 25 and the blowers 19 and 28 are operated, the evaporator 15 exhibits a cooling action. The cool air cooled by exchanging heat with the evaporator 15 is blown up in the rear duct 9 by the blower 19 and blown out from the blowout port 16 at the upper edge of the opening 13 toward the suction port 17 at the lower edge of the opening 13.

  The cold air blown out from the air outlet 16 is sucked from the air inlet 17 while forming a cold air curtain in the opening 13. A part of the cool air curtain also circulates in the display chamber 11, thereby cooling the display chamber 11 to a predetermined temperature. The cold air that has flowed into the lower duct 14 from the suction port 17 is again sucked into the blower 19 and repeatedly circulated to be discharged toward the evaporator 15.

  Here, as shown in FIG. 2 in an enlarged manner, in the present invention, in the region where the cold air blown out from the outlet 16 flows, the lower side of the outlet 16, that is, the outer end of the outlet 16 (X1 below) The cold air guide 21 is provided at a position separated from the air) in the cold air blowing direction. The cold air guide 21 of the embodiment is a plate-like member made of a transparent hard resin material. The cool air guide 21 has a width substantially equal to the width in the longitudinal direction (left-right direction) of the air outlet 16, and a cross section cut along a surface (surface in the front-rear direction) perpendicular to the longitudinal direction is as shown in FIG. 3. It exhibits a symmetrical wing shape.

  Further, the position of the cool air guide 21 in the front-rear direction is set such that the width from the outer end (front end) X1 to the inner end (rear end) X2 of the air outlet 16 shown in FIG. To the position of the cool air guide 21 is set to be ½ W or less. In the embodiment, as shown in FIG. 2, the cold air guide 21 is arranged in a region where the cold air flows at the outer end X1 of the outlet 16 (that is, the distance in the front-rear direction from the outer end X1 to the position of the cold air guide 21). Is zero). The outer end X1 is a position (a position in the front-rear direction) where the cold air blown out from the air outlet 16 comes into contact with the outside air.

  Further, the vertical position of the cold air guide 21, that is, the distance H at which the cold air guide 21 is separated from the outer end X1 of the air outlet 16 is set to 1 / 5W ≦ H ≦ 1 / 2W in the embodiment. In the embodiment, the honeycomb rectifying body 18 is located above and below the lower end of the outer end X1 of the outlet 16; however, the honeycomb rectifying body 18 is lower end of the outer end X1 and the inner end X2 of the outlet 16 (FIG. 2). In the case of being provided up to the positions indicated by X1 and X2, the distance H may be a distance from the honeycomb rectifier 18.

  Further, in the embodiment, the lower end of the air outlet 16 (the position of a line L1 connecting X1 and X2 shown in FIG. 4 described later) is grasped as a position where the cold air contacts with the outside air, and the following explanation will be given. When the honeycomb rectifying body 18 is located above and below the lower end of the air outlet 16, and the position immediately after exiting the honeycomb rectifying body 18 is recognized as the contact position with the outside air (that is, the air outlet). 4 may be located above the lower end of the air outlet 16 in FIG. 4 (the position of the line L1 connecting X1 and X2 shown in FIG. 4) (separated from the honeycomb rectifier 18). Position).

  Hereinafter, the effect of the cold air guide 21 of the present invention will be described with reference to FIGS. As described above, the cool air itself blown from the honeycomb rectifier 18 provided at the air outlet 16 of the open showcase 1 is a uniform and less turbulent flow. However, a vortex is generated by coming into contact with the outside air immediately after exiting from the air outlet 16.

  Also in the case of the present invention, the cold air guide 21 is provided at a position separated from the outer end X1 of the air outlet 16 in the air blowing direction, so that the cold air coming out from the air outlet 16 is outside air as schematically shown in FIG. To generate a flow in the direction along the cold air curtain. The cold air immediately after exiting from the air outlet 16 comes into contact with the outside air and a vortex is generated there. That is, in the present invention, the cold air guide 21 is not provided continuously to the air outlet 16 but is intentionally generated by separating the air guide 21 from the air outlet 16. The generated vortex also flows along the cold air curtain, but in the present invention, since the cold air guide 21 is provided there, the vortex is canceled by the cold air guide 21 and the development is suppressed (FIG. 4). . Thereby, the flow velocity distribution along the cold air curtain is formed, and mixing with the outside air is suppressed.

  In particular, as shown in FIG. 3, the cross section obtained by cutting the cold air guide 21 along a plane perpendicular to the longitudinal direction has a symmetrical wing shape, so that the cold air flows smoothly along the front surface and the outer surface of the cold air guide 21. Become. As a result, the development of vortices can be effectively suppressed.

  Further, in the embodiment, as described above, the cold air guide 21 is disposed in the region where the cold air flows at the outer end X1 of the outlet 16. The outer end X1 is a position where the cold air blown out from the blower outlet 16 comes into contact with the outside air. By arranging the cold air guide 21 at the outer end X1, the effect of suppressing the vortex can be remarkably improved.

  This state is verified by the flow velocity distribution. 5 to 7 show the measurement results of the flow velocity distribution when the flow velocity of the cold air curtain blown from the outlet 16 of the open showcase 1 is 1.2 m / s. FIG. In the case where the cold air guide 21 is arranged so as to be spaced apart from the outer end X1 of the outlet 16 in the outlet direction as in the invention (in this embodiment, the width W of the outlet 16 is 65 mm, and the distance H from the outer end X1 is 13 mm = 1) FIG. 6 shows a case where the cold air guide 21 is not provided, and FIG. 7 shows a case where the cold air guide 21 is continuously attached to the outer end X1 of the outlet 16.

  Comparing the cases of FIGS. 5 to 7 with reference to the line L2 having a flow velocity of 0.93 m / s and the line L3 having a flow velocity of 0.23 m / s, in the case of FIG. 5 (the present invention), the flow velocity is 0.93 m / s. The s line L2 extends just above the fourth shelf 12 from above, but in the case of FIG. 7, the line L2 with a flow velocity of 0.93 m / s is the third and fourth tiers from the top. It extends only to the midpoint of the eye shelf 12. In particular, in the case of FIG. 6, the line L <b> 2 with a flow velocity of 0.93 m / s ends up to the third shelf 12 from the top.

  That is, the cool air guide 21 is provided at a position spaced apart from the outer end X1 of the blower outlet 16 in the blowing direction as in the present invention (FIG. 5), so that the cool air guide 21 is not provided (FIG. 6) or the cool air guide 21 is provided. It turns out that the fall of the flow velocity of the cold air (cold air curtain) blown out from the blower outlet 16 was suppressed rather than the case where it provided continuously in the blower outlet 16 (FIG. 7).

  Further, focusing attention on the line L3 having a flow velocity of 0.23 m / s, the lower portion of the line L3 having a flow velocity of 0.23 m / s greatly expands outside the open showcase 1 in FIG. The width of the lower portion of the line L3 having a flow velocity of 0.23 m / s is the smallest in FIG. 5 (the present invention). That is, the cool air guide 21 is provided at a position spaced apart from the outer end X1 of the blower outlet 16 in the blowing direction as in the present invention (FIG. 5), so that the cool air guide 21 is not provided (FIG. 6) or the cool air guide 21 is provided. It can be seen that the outflow of the cold air (cold air curtain) blown out from the air outlet 16 to the outside is suppressed as compared with the case where the air outlet 16 is provided continuously (FIG. 7).

  Next, the temperature distribution in the display chamber 11 is verified. 8 to 10 show the results of measuring the temperature distribution in the display chamber 11 when the flow velocity of the cold air curtain is 1.2 m / s, and FIG. 8 shows the cold air guide as shown in FIG. 2 (the present invention). 21 is spaced from the outer end X1 of the outlet 16 in the blowing direction (similarly, in the embodiment, the width W of the outlet 16 is set to 65 mm, and the distance H from the outer end X1 is set to 13 mm = 1/5 W). FIG. 9 shows a case where the cold air guide 21 is not provided, and FIG.

  When comparing the case of FIGS. 8 to 10 with reference to the point of + 6.0 ° C. indicated by X3 and the line of + 22.0 ° C. indicated by L4 in each figure, in the case of FIG. The point X3 at 0.0 ° C. is stopped below the fourth shelf 12 from the top, but in the case of FIG. 10, this point X3 at the temperature 6.0 ° C. is the fourth shelf from the top. It rises to the upper side of 12. In particular, in the case of FIG. 9, the point X3 at a temperature of 6.0 ° C. rises from the top to the lower side of the third shelf 12.

  On the contrary, in the case of FIG. 9 and FIG. 10, the temperature of the ceiling portion of the display chamber 11 is lower (2.0 ° C.) than in the case of FIG. .0 ° C.). That is, by providing the cold air guide 21 at a position spaced apart from the outer end X1 of the blower outlet 16 in the blowing direction as in the present invention (FIG. 8), the cold air guide 21 is not provided (FIG. 9) or the cold air guide 21 is provided. The temperature rise in the lower part of the display chamber 11 is suppressed and the temperature difference between the upper part and the lower part is reduced so that the temperature in the display room 11 is uniform compared to the case where the air outlet 16 is continuously provided (FIG. 10). You can see that

  Further, focusing attention on the line L4 having a temperature of 22.0 ° C., in the case of FIG. 9, the line L4 having a temperature of 22.0 ° C. is larger than the open showcase 1, and in FIG. Behind, in FIG. 8 (the present invention), the line L4 having a temperature of 22.0 ° C. is the rearmost (display chamber 11 side). That is, by providing the cold air guide 21 at a position spaced apart from the outer end X1 of the blower outlet 16 in the blowing direction as in the present invention (FIG. 8), the cold air guide 21 is not provided (FIG. 9) or the cold air guide 21 is provided. It can be seen that the outflow of the cold air (cold air curtain) blown out from the air outlet 16 to the outside is suppressed as compared with the case where the air outlet 16 is provided continuously (FIG. 10).

  Next, FIG. 11 shows the result of measuring the average temperature (average value of 15 evaluation points) in the display chamber 11 when the distance H at which the cool air guide 21 is separated from the outer end X1 of the air outlet 16 is changed. ing. The broken line indicates the case where the cold air guide 21 is not provided, and the solid line indicates the case where the cold air guide 21 is provided. Accordingly, H = 0 in the figure is the case where the cold air guide 21 is continuously provided at the outlet 16.

  As is apparent from this figure, when the flow velocity is 1.2 m / s, the average temperature in the display chamber 11 is the lowest at the position of H = 13 mm in the above embodiment, that is, 1/5 W. And it turns out that it becomes favorable to the position of H = 32.5mm, ie, 1 / 2W.

  FIG. 12 shows the average temperature in the display chamber 11 when the flow velocity of the cold air curtain is 1.9 m / s, and FIG. 13 shows the display chamber when the flow velocity of the cold air curtain is 0.9 m / s. 11 shows the average temperature. In the case of FIG. 12, the peak at the lower end is slightly obscured, but in any case, the average temperature in the display chamber 11 is lowered in the range of 1/5 W ≦ H ≦ 1/2 W.

  As described above in detail, in the present invention, the cool air blown out from the air outlet 16 of the open showcase 1 flows, and from the outer end X1 of the air outlet 16 (or the honeycomb rectifier 18 as described above). Since the cool air guide 21 is provided at a position spaced apart in the cool air blowing direction, and the cool air guide 21 is configured by a plate-like member having a width substantially equal to the width in the longitudinal direction of the air outlet 16, The development of the vortex can be suppressed by the cold air guide 21 provided where the vortex is generated in the curtain.

  As a result, a flow velocity distribution along the cold air curtain is formed and mixing with the outside air due to the disturbance of the cold air curtain is suppressed, so that the cooling effect in the display chamber 11 can be remarkably improved.

  Further, when the width from the outer end X1 to the inner end X2 of the air outlet 16 is W, the distance from the outer end X1 of the air outlet 16 to the position of the cool air guide 21 is set to 1/2 W or less. Therefore, mixing of the cold air curtain and the outside air can be more effectively suppressed.

  Further, the distance that the cool air guide 21 is separated from the air outlet 16 (or the honeycomb rectifier 18) is H, and the width W from the outer end X1 to the inner end X2 of the air outlet 16 is 1/5 W ≦ H ≦ 1. Since it is set to / 2W, it is possible to eliminate the inconvenience that the cool air guide 21 interferes with the delivery of goods while effectively suppressing the development of vortices.

  In particular, since the cross section of the cold air guide 21 cut by a plane orthogonal to the longitudinal direction has a symmetrical wing shape, the cold air smoothly flows along the front surface and the outer surface of the cold air guide 21 and effectively suppresses the development of vortices. Can do.

  Further, since the cool air guide 21 of the embodiment is made of a transparent material, the product display effect in the display chamber 11 is not adversely affected.

  In addition, each numerical value shown in the Example is not restricted to it, and it cannot be overemphasized that it should change suitably according to the dimension and application of an open showcase.

DESCRIPTION OF SYMBOLS 1 Open showcase 6 Back panel 7 Top panel 9 Back duct 10 Deck pan 11 Display room 12 Shelf 14 Lower duct 15 Evaporator 16 Outlet 17 Evaporator 18 Honeycomb rectifier 19 Blower 21 Cooling air guide

Claims (5)

A blowout port formed at one end of the opening of the display chamber and a suction port formed at the other end of the opening, and forming a cold air curtain in the opening by blowing cool air from the blowout port toward the suction port In an open showcase consisting of
A cold air guide provided in a region where the cold air blown out from the blower outlet flows and provided at a position separated from the outer end of the blower outlet in the cold air blowing direction,
The cold air guide is composed of a plate-like member having a width substantially equal to the width in the longitudinal direction of the air outlet ,
An open showcase in which the distance from the outer end of the air outlet to the position of the cold air guide is set to 1/2 W or less, where W is the width from the outer end to the inner end of the air outlet. . A blowout port formed at one end of the opening of the display chamber and a suction port formed at the other end of the opening, and forming a cold air curtain in the opening by blowing cool air from the blowout port toward the suction port In an open showcase consisting of
A honeycomb rectifier attached to the air outlet;
A cold air guide provided in a region where the cold air flowing out from the honeycomb rectifier flows and which is separated from the honeycomb rectifier in the cold air blowing direction,
The cold air guide is composed of a plate-like member having a width substantially equal to the width in the longitudinal direction of the honeycomb rectifier .
An open showcase in which the distance from the outer end of the air outlet to the position of the cold air guide is set to 1/2 W or less, where W is the width from the outer end to the inner end of the air outlet. . 1/5 W ≦ H ≦ 1/2 W, where H is the distance that the cool air guide is separated from the air outlet or honeycomb rectifier, and W is the width from the outer end to the inner end of the air outlet. The open showcase according to claim 1 or 2 , wherein the open showcase is characterized. Section cut along a plane perpendicular to said cool air guide in the longitudinal direction, open showcase according to any one of claims 1 to 3, characterized in that exhibits a symmetric wing. The cool air guide is open showcase according to any one of claims 1 to 4, characterized in that it is constituted by a transparent material.

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