JPS598746B2 - refrigerated case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigerated showcase that cools a storage compartment from the front and back surfaces by dividing a cold air flow, and the object thereof is to divide a cold air flow without using a flow dividing plate. , by making the flow rates different.

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a refrigerated showcase whose main body is composed of a heat insulating wall 3 in which an opening 2 for storing and taking out products is formed. A plurality of blow-off holes 4, 4' are provided in the back wall 5' at intervals.
A cold air passage 8 in which a partition plate 5 having a shape of
A storage chamber 10 comprising a storage chamber 10 and both upper and lower end edges of the front opening 2 have air outlet and suction ports 11 and 12 facing each other in the longitudinal direction,
By forcedly circulating the cold air flow heat exchanged in the cooler as shown by the arrow with the blower 7, a low-temperature air curtain is formed in the front opening 2, and the cold air flow is blown out from the blow-off holes 4 and 4' to fill the storage chamber. Cool 10.

, 13 is a machine room formed at the bottom of the main body, which includes a condenser 14A1 and a compressor 14, which constitutes a refrigeration cycle together with the cooler.
B and blower 14C are installed.

11 is provided at the lower front of the back inside the cold air passage 8 by arranging a partition plate 15 with good thermal conductivity on the front of the cooler 6 at an appropriate distance from the rear surface of the back wall 5' of the partition plate. In the formed auxiliary passage, the lower part of the passage is closed and the upper part is opened 16 to communicate the cold air passage 8 and the storage chamber 10, so that a part of the cold air flow in the cold air passage 8 descends to the front of the cooler 6. Blowout hole 4' at the bottom
It is guided to the lower part of the storage chamber 10 through...

Reference numeral 19 denotes a first butt-full plate with a hole 18 formed therein, which is fixed to the back wall 5 or partition plate 15 near the opening 16, and is connected to the auxiliary passage 17.
slow down the flow rate of cold air passing through.

Reference numeral 20 indicates a blowout hole 4 located above the opening 16.
- A second L-shaped baffle plate fixed to the lower part of the cold air inlet side of
At the same time, the static pressure is reduced from the downstream side to the upstream side of the back side of each blow-off hole, and the cold air flow is blown out from the high-pressure cold air passage 8 to the low-pressure storage chamber 10 through each blow-off hole. slow down the flow rate.

Reference numeral 22 denotes a support plate that supports the motor 23 of the blower 7 through the casing 21. Its upper end is fixed to the back wall of the heat insulating wall 2, and its lower end is fixed to the upper end of the partition plate 15 so as to be inclined forward and downward. The blower 1 is tilted and supported so that the cool air that has passed through the cooling air passage 6 flows obliquely upward and forward and collides with the back surface of the back wall 5' of the partition plate 5, which is the front wall of the back of the cold air passage 8.

According to such a configuration, since the cooler 6 is arranged at the back of the cold air passage 8, the depth dimension of the storage chamber 10 can be shortened to make it easier to store and take out products from the back of the storage chamber 10. There is also a partition plate 15 located in front of the cooler 6 and forming an auxiliary passage 17 between the partition plate 5 and the upper part of the cooler 6 that guides a part of the cold air flow from the cooler 6 to the storage chamber 10. Support the blower 7 so that the upper end is the back wall of the insulation wall 3,
Since the lower ends of the support plates 22 are attached to the partition plate 15 and tilt downward toward the front, the back of the cold air passage 8 is divided into a high-pressure side and a low-pressure side with the partition plate 15 and the support plate 22 serving as boundaries. Moreover, since the lower end of the support plate 22 is attached to the upper end of the partition plate 15, the blower 7 can be supported tilted forward and downward in the same way as the support plate 22, and the cooler can be maintained at a predetermined pressure. In order to make the cold air flow from 6 collide with the back wall 5' of the partition plate 5 using the blower γ and to separate the flow in both the vertical direction, the back wall 5' of the partition plate 5 acts as a flow dividing plate to form the cold air passage 8. In addition, the cold air flow that is divided upward is guided at an obtuse angle, that is, the flow resistance is reduced, and the flow rate is increased, and the cold air flow that is divided downward is guided at an acute angle, that is, the flow resistance is increased, and the flow path resistance is increased. In addition, the cool air flow divided downward can be further lowered and guided to the auxiliary passage 17, and then recirculated by the thermally conductive partition plate 15 cooled by the cooler 6. For cooling, it is possible to maintain the descending cold air flow, which has slightly risen due to heat radiation from the motor 23, at approximately the same temperature as the cold air flow passing through the cooler 6, and furthermore, the descending cold air flow can be maintained at approximately the same temperature as the cold air flow passing through the cooler 6. Since the air is blown out from the auxiliary passage 17 in such a manner, it is possible to improve the cooling effect of the lower part of the storage chamber 10, which faces the turbulent region downstream of the air curtain, which has heated up due to contact with the outside air. The support plate 22 and the partition plate 15 can be removed in sequence, and the cold air passage 8
, the auxiliary passage 17, the blower 7, and the cooler 6 can be easily maintained and inspected from the front.

As described above, the present invention comprises a main body with a heat insulating wall with an opening in the front, a partition plate is arranged at an appropriate distance from the inner surface of the heat insulating wall to form a cold air passage and a storage chamber, and In a refrigerated showcase in which an air curtain is formed by forced circulation of cold air, there is a cooler at the back of the cold air passage, and a part of the cold air flow from the cooler is placed between the cooler and the partition plate located in front of the cooler. A thermally conductive partition plate that forms an auxiliary passageway with an open top leading to the bottom of the storage room.The blower is supported so that it is located above the cooler.The upper end is attached to the back wall of the insulation wall, and the lower end is attached to the upper end of the partition plate. The partition plate and the support plate define cold air passages on the high pressure side and the low pressure side, respectively, so that the pressure can be maintained at a predetermined pressure. In addition, since the blower can be supported tilted forward and downward by the support plate and the back wall of the partition plate can act as a distribution plate for the cold air flow, the air is diverted upward and used as an air curtain. The cold air flow is guided at an obtuse angle to increase its flow rate, and the flow path resistance due to collisions is reduced.The cold air flow, which is divided downward to cool the lower part of the storage chamber, is guided at an acute angle to reduce its flow rate and the flow path resistance caused by collisions is reduced. In addition, the cold air flow that has been diverted downward and guided to the auxiliary passage is recooled by the partition plate in front of the cooler and maintained at approximately the same temperature as the cold air flow immediately after passing through the cooler. As a result, the speed of the cold air flow for cooling the lower part of the storage room is made slower than the speed of the cold air flow for the air curtain, thereby improving the cooling effect of the lower part of the storage room facing the turbulent area downstream of the air curtain. There is no need to disturb the turbulent area of the curtain from the storage room side.Furthermore, the cold air diverted downward can be circulated without coming into contact with the outside air, thereby slowing down the formation of frost on the cooler.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the refrigerated showcase of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part of the present invention. 2...Front opening, 3...Insulating wall, 5.
...Dividing board, 6...Cooler, 7...
...Blower, 8...Cold air passage, 10...
・Storage room, 15... Partition plate, 1γ...
Auxiliary passage, 22...Support plate.

Claims (1)

[Claims] 1 The main body is composed of a heat insulating wall with an opening in the front, partition plates are arranged at suitable intervals on the inner surface of the heat insulating wall to form a cold air passage and a storage chamber, and a forced circulation cold air flow is provided in the front opening. In a refrigerated showcase formed by forming an air curtain,
A cooler is located at the back of the cold air passage, and an auxiliary passage with an open top is formed between the cooler and the partition plate in front of the cooler to guide a portion of the cold air flow from the cooler to the lower part of the storage room. The partition plate supports the blower so as to be positioned above the cooler, and the upper end is attached to the back wall of the insulating wall, and the lower end is attached to the upper end of the partition plate, and the support plate is tilted forward and downward. A refrigerated showcase.