JPH0434379Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a show case, particularly a show case suitable for displaying and selling meat.

[Prior Art] A conventional show case used for displaying and selling meat has a cooling coil installed on the top plate of the case in order to cool the inside of the case by natural convection of cold air.

However, since the front panel of a show case is usually tilted rearward and upward so that exhibits can be clearly seen, the top panel is narrower than the bottom panel in the front and back direction of the case, and this narrow top panel is narrower than the bottom panel in the front and back direction of the case. The cooling coil installed on the board had to be made smaller in order not to reduce the volume of the exhibition room.

Therefore, in order to maintain the temperature inside the exhibition room at a predetermined temperature using this small cooling coil, it is necessary to lower the temperature of the cooling coil by flowing a large amount of refrigerant through the cooling coil. As a result of removing excess water by cooling coils, the exhibition room became dry and the freshness of the meat inside the case quickly deteriorated.

In order to deal with this problem, it is possible to install a large-capacity cooling coil by using the wide space under the bottom plate as a cooling chamber.
Publication No. 40779 discloses a low-temperature show case in which a cooler (evaporator) is provided in a cooling chamber below a storage chamber.

However, in the conventional storage case mentioned above, the air cooled in the cooling room is blown upward along the door inside the storage room, so unless the cold air that has become heavier due to cooling is blown up strongly, it will reach the upper part of the storage room. Moreover, since the air is drawn from the storage room into the cooling room through a suction port installed at the bottom of the storage room, the air taken into the cooling room is replaced by warm air that has risen inside the storage room. Instead, it is heavy cold air that accumulates in the lower part of the storage compartment, and as a result, the cold air circulates only in the lower part of the storage compartment. Therefore, in order to effectively cool the entire storage room including the upper part, it is necessary to suck in the air inside the storage room with a strong force and blow it out again, but even if this improves the circulation of cold air, This air current causes various problems such as drying out of the meat in the storage room.

That is, in general, a thin laminar boundary film is formed on the surface of an object in a moving fluid, and within this boundary film there is no velocity component or turbulence perpendicular to the flow, so heat is transferred by thermal conduction, and substances It will move by molecular expansion. However, the strong air flow destroys this barrier film, so that even if heat conduction or cooling is effective, the freshness of the food will be significantly reduced due to moisture dissipation. Moreover, the membrane on the inner surface of the front glass plate of the show case is similarly destroyed, and cooling of the glass plate promotes dew condensation on its outer surface, and moreover, the cold air is wasted.

Furthermore, it is effective to use only the air warmed inside the case as the air to be cooled in the cooler, but if the air inside the case is stirred by the strong airflow mentioned above, efficient cooling cannot be achieved. become unable to do so.

As a result, it is important to cool the case without moving the air as much as possible, and this problem also needs to be solved when a cooler is disposed below the storage chamber.

In addition, in this type of case, when the door is opened, warm outside air flows into the storage chamber through the upper part of the opening, but in the case of the conventional case mentioned above, the air inlet into the cooling chamber is located at the front of the storage room. Because it is installed at the bottom of the opening, the outside air that flows in from the top of the opening flows forward through the storage chamber and then descends while being diffused, and some of it is sucked into the cooling chamber from the suction port, but most of the outside air flows into the room. It diffuses throughout the body and serves to expel cold air to the outside. For this reason, there was a drawback that the cooling function suddenly decreased when the door was opened.

[Problem to be solved by the invention] The technical problem of the invention is that by installing a large cooling coil in a large space under the bottom plate as a cooling chamber, storage can be achieved without excessively lowering the temperature of the cooling coil. In order to have a cooling capacity that can maintain the room at the desired temperature and to reduce the amount of moisture removed by the cooling coil, the air inside the case should be kept as static as possible to prevent the destruction of the film in each part, and the temperature inside the case should be reduced. To prevent foods such as meat from drying out and at the same time to provide effective cooling, and to prevent the cooling function from being impaired by outside air flowing into the storage room when the door is opened. be.

[Means for Solving the Problems] In order to solve the above problems, the present invention forms an exhibition room by a top plate, a bottom plate, left and right side plates, a front plate, and a rear plate provided with a window fitted with a door. In the display case, a wide cooling chamber is formed under the bottom plate, spanning almost the entire width of the bottom plate, and the cooling chamber has enough cooling capacity to maintain the exhibition room at a desired temperature without excessively lowering the coil temperature. A large-capacity cooling coil is installed at the rear of the bottom of the top plate.
An air outlet duct with multiple air outlets facing downward is installed at the front of the lower surface of the top plate, and a suction duct with multiple air inlets facing forward is placed parallel to the front and rear panels. Each of these ducts is connected to the cooling chamber through a vertical duct installed along the rear panel, and one of the ducts is provided with a fan for circulating cold air. be.

[Function] Cold air is cooled to an appropriate temperature by a large-volume cooling coil installed in a large cooling room, and then flows downward into the exhibition room from the rear upper part of the exhibition room through a blow-out duct by a cold air circulation fan installed in the duct. do. In addition, the air that cools the exhibition room and warms up is sucked in through a suction port that opens at the front upper part of the exhibition room, and is returned to the cooling room through the suction duct. Therefore, the air in the exhibition room naturally convects due to its own weight, and there is no need to generate strong air currents using fans.

In this way, by keeping the air inside the case as little as possible and preventing the destruction of the membrane in each part, you can prevent food such as meat inside the case from drying out, and at the same time,
It becomes possible to perform effective cooling.

In addition, the cold air outlet opens downward at the rear of the exhibition room, and the warm air inlet opens forward at the front of the exhibition room, so that the air flowing out from the outlet and the air being sucked in from the inlet are separated. Mutual interference is prevented, and turbulence due to interference does not occur.

Furthermore, when the sliding door is opened, the warm outside air that flows into the exhibition room from the top of the window is immediately sucked into the suction duct from the suction port at the top of the exhibition room, and does not diffuse to the bottom of the exhibition room. It is difficult for cold air to flow out due to the inflow of water.

[Example] In the example shown in the drawings, the case 1
An exhibition room 7 is formed by a top plate 2 that is narrow in the front and rear directions, a wide bottom plate 3, left and right side plates 4, 4, and a front plate 5 and a rear plate 6 made of glass plates that slope backward. has been done. Further, a window 8 for taking out exhibits is formed in the rear panel 6 with a gap between the top panel 2, the bottom panel 3, and the side panels 4, 4, and a sliding door 9 is provided in the window 8. It is fitted.

Under the wide bottom plate 3, a wide cooling chamber 10 is formed that spans almost the entire width of the bottom plate 3 by utilizing the space below. , horizontal ducts 13, 13 having a plurality of openings 12, . This cooling coil 1
1 is provided with a cooling ability that can maintain the exhibition room 7 at a desired temperature without reducing the temperature excessively.

On the other hand, at the rear of the lower surface of the top plate 2, there is an air outlet duct 1 having a plurality of air outlets 14, . . . opened downward.
5 has a plurality of suction ports 16, . . . on the front of the lower surface.
A suction duct 17, which is opened facing forward, is arranged in a direction parallel to the front and rear plates, respectively, and a rear plate 6, a side plate 4,
Vertical ducts 18, 18 are installed adjacent to 4. The upper end of one of the vertical ducts 18 is connected to the blowout duct 15, the lower end of which is connected to one of the horizontal ducts 13, the upper end of the other vertical duct 18 is connected to the suction duct 17, and the lower end is connected to the other horizontal duct 13. The cooling chamber 10 and the exhibition room 7 are connected to each other to form a circulation path.

Although not shown in the duct, a fan for circulating cold air is installed in the duct, while in the exhibition room 7 there is a lighting fixture 20 and a side panel 4 on the lower front side of the top plate 2. , 4 are provided with multiple shelves 21 for displaying exhibits.

The top plate 2, the side plates 4, 4, the lower side of the cooling chamber 10, and the rear plate 6 are all formed into double walls with a heat insulating material filled between them.

In the case having the above configuration, when the fan motor is rotated, the cold air cooled by the large volume cooling coil 11 installed in the wide cooling chamber 10 is transferred to one of the horizontal ducts 13 and then to the vertical duct 1.
8 and flows into the exhibition room 7 from the air outlet 14, . The suction ports 16, .
..., vertical duct 18, horizontal duct 1
3 to the cooling chamber 10, where it is cooled again. Therefore, the air in the exhibition room 7 naturally convects due to its own weight, and there is no need to generate a strong air current using a fan.

Here, the cold air outlet 14 opens downward into a blowout duct 15 located at the rear of the exhibition room 7, and the warm air intake port 16 opens forward into a suction duct 17 located at the front of the exhibition room 7. Therefore, the air flowing out from the blow-off port 14 and the air sucked into the suction port 16 do not interfere with each other, and therefore, turbulence due to interference is less likely to occur.

The cooling coil 11 is installed in the large cooling room 10 and has a large volume, so it has cooling capacity to maintain the exhibition room 7 at a predetermined temperature without excessively lowering the temperature of the cooling coil 11. Therefore, the cold air circulating in the exhibition room 7 is less likely to be excessively cooled and deprived of moisture in the cooling room 10, so that the inside of the exhibition room 7 can be prevented from drying out.

In addition, due to the natural convection mentioned above, exhibition room 7
Drying of these foods will be more effective if the air inside the exhibition room is kept as small as possible to prevent the destruction of the film formed on the surfaces of foods such as meat in the exhibition room, or on the inner surface of the front panel 5 made of a glass plate. At the same time, it is possible to prevent dew condensation on the surface of the glass plate of the front plate 5, and it is possible to perform effective cooling without wasting cold air.

When sliding door 9 of show case 1 is opened, window 8
The warm outside air that flowed into exhibition room 7 from the top of the
Since the cold air is immediately sucked into the suction duct 17 from the suction port 16 at the upper part of the exhibition room 7 and does not flow down and diffuse in the lower part of the exhibition room 7, cold air does not flow out due to the inflow of outside air.

Note that the front plate 5 may be fitted with a glass sliding door in place of the glass plate in order to be able to be opened and closed.
Further, the window 8 on the rear panel may be provided with a door instead of a sliding door.

[Effects of the invention] In this invention, a large space under the bottom plate is used as a cooling chamber, and by installing a large cooling coil in this cooling chamber, the temperature of the exhibition room can be improved without excessively lowering the temperature of the cooling coil. Because it has the cooling capacity necessary to maintain temperature, the cooling coils can prevent the air circulating in the exhibition room from being excessively cooled, and this prevents the circulating air from being deprived of moisture in the cooling room. Since the amount of water is reduced, drying in the exhibition room can be prevented and the freshness of the exhibits can be maintained for a long time.

In addition, the cold air cooled to an appropriate temperature by the above cooling coil flows into the exhibition room from the rear upper part of the exhibition room through the blow-off duct, and the warmed air that rises inside the exhibition room is sucked in from the air inlet at the top of the exhibition room. Since the air in the exhibition room naturally convects due to its own weight, there is no need to generate strong air currents using fans. Therefore, it is possible to prevent the destruction of the film formed on the surface of food such as meat in the exhibition room, the inner surface of the front panel made of glass, etc., without moving the air inside the case as much as possible. This effectively prevents food from drying out and at the same time prevents dew condensation on the surface of the glass plate of the front plate, making it possible to perform effective cooling without wasting cold air.

Furthermore, the cold air outlet opens downward at the rear of the exhibition room, and the warm air inlet opens forward at the front of the exhibition room, so that the air flowing out from the outlet and the air being sucked in from the inlet are separated. Mutual interference is prevented, and turbulence due to interference does not occur.

Moreover, when the sliding door is opened, the warm outside air that flows into the exhibition room from the top of the window is immediately sucked into the suction duct from the intake port at the top of the exhibition room, and does not diffuse to the bottom of the exhibition room. There is no outflow of cold air due to the inflow of air.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a perspective view thereof and FIG. 2 being a sectional view thereof. 1...Show case, 2...Top plate, 3...Bottom plate, 4...Side plate, 5...Front plate, 6...Rear plate,
10...Cooling chamber, 11...Cooling coil, 14...
Air outlet, 15...Blowout duct, 16...Suction port,
17... Suction duct, 18... Vertical duct.

Claims (1)

[Scope of Claim for Utility Model Registration] In a show case in which an exhibition room is formed by a top plate, a bottom plate, left and right side plates, a front plate, and a rear plate with a window fitted with a door, the bottom plate is placed under the above-mentioned bottom plate. forming a wide cooling chamber that spans almost the entire width, and installing a large-volume cooling coil in the cooling chamber that has enough cooling capacity to maintain the exhibition room at a desired temperature without excessively lowering the coil temperature; At the rear of the lower surface of the top plate, there is an air outlet duct with multiple air outlets facing downward, and at the front of the lower surface of the top plate, there is a suction duct with multiple air inlets facing forward. These ducts are connected to the cooling chamber separately by vertical ducts installed along the rear panel, and one of the ducts is provided with a fan for circulating cold air. A show case characterized by the following.