JP2001082856A - Duct structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and efficiently cool a cooling chamber without unevenness by uniformly supplying cold air to the entire part of the cooling chamber. SOLUTION: On the upper part of a heat insulating box body 18, an evaporator cover 48 communicating with a cooling chamber 12 and having an evaporator 30 included therein is arranged. An inlet port for feeding the air of the cooling chamber 12 to the evaporator cover 48 and an outlet port 44 for supplying air cooled in the evaporator 30 are formed on the ceiling part of the heat insulating box body 18. A cold air duct 46 is disposed at positions corresponding to the inlet port and the outlet port 44 on the inner ceiling surface of the heat insulating box body 18. Front and back air supply parts 52 and right and left air supply parts 54 for supplying the cold air supplied from the outlet port 44 forward and backward and rightward and leftward in the cooling chamber 12 are defined by the cold air duct 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct structure, and more particularly to a duct structure capable of eliminating temperature unevenness inside a refrigerated showcase having a horizontally long structure and efficiently cooling the same. is there.

[0002]

2. Description of the Related Art As shown in FIG.
In order to uniformly cool the inside of the horizontally long cooling chamber 62 defined inside the cooling chamber 1, cooling air outlets 64 are arranged at the bottom near the both ends in the longitudinal direction of the cooling chamber 62, respectively, and near the center in the longitudinal direction. A suction port 66 through which air in the cooling chamber 62 is sucked is disposed at the bottom.

The flow of cold air in the cooling chamber 62 of the refrigerated showcase 60 will be described below. Cool air cooled by a cooling mechanism 70 provided in a machine chamber 72 defined at the lower portion of the main body 61 is Cold air duct 6 arranged in machine room 72
8 and is guided to the outlets 64, 64 through the cooling chamber 6
It is blown out to 2. This cool air is sucked from the suction port 66 after cooling the entire inside of the cooling chamber 62, is cooled by the cooling mechanism 70, and is blown into the cooling chamber 62 again from the outlets 64, 64.

[0004]

As described above, the cooling chamber 62
Has a horizontally long structure, in order to perform efficient and uniform cooling, as described above, the plurality of outlets 64, 64
Is required. However, when the number of the outlets 64 increases, a large installation space is required, and the number of parts increases to increase the cost. Another drawback is that the display space for commodities is reduced.

Further, in the structure in which the delivery port 64 and the suction port 66 are provided at the bottom of the cooling chamber 62 as described above, the cool air is blown up from below, and the heat is exchanged to suck the cool air whose temperature has increased. Therefore, it is pointed out that the cold air is guided upward and the warm air is directed downward against the natural circulation, so that the circulation of the cold air is easily hindered, and efficient and uniform cooling becomes difficult.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems inherent in the prior art, and has been proposed in order to suitably solve the problem. Accordingly, it is an object to provide a duct structure capable of cooling the cooling chamber uniformly and efficiently.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately achieve the intended purpose, a duct structure according to the present invention uses air in a cooling chamber defined inside a box to evaporate. And a cooling duct for blowing out the cold air to the cooling chamber.The duct structure is disposed at the upper part of the box, communicates with the cooling chamber, and houses the evaporator therein. An evaporator cover, a suction port formed in a ceiling portion of the box body, a suction port for sucking air in the cooling chamber into the evaporator cover, and a discharge port for sending cool air cooled by the evaporator, and an inside of the box body. A front-rear air supply unit that is defined by arranging a cool air duct at a position corresponding to the intake port and the air outlet on the ceiling surface, and cools air sent from the air outlet, and blows out the front, rear, left, and right of the cooling chamber. Left and right air supply sections and suction of the box in the cold air duct And it provided at corresponding positions, and is blocked with a space cold air flowing in the cool air duct, characterized in that the air of the cooling chamber was composed of an introduction portion for guiding the suction port.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a duct structure according to the present invention will be described below with reference to the accompanying drawings by way of preferred embodiments. In addition, front and rear and left and right directions in the description correspond to the short direction and the long direction of the refrigerated showcase.

A refrigerated showcase 10 employing a duct structure according to an embodiment, as shown in FIG. 1, FIG. 2 and FIG.
Interior board 20, exterior board 22, and interior board 20 and exterior board 22
Insulation box composed of insulation material 24 filled between
Inside the (box) 18, a cooling chamber 12 long in the left-right (longitudinal) direction is provided.
Are insulated, and a machine room 14 is defined in a cabinet 25 disposed above the heat insulating box 18. Sliding doors 26, 26 into which glass or the like are fitted are respectively fitted to the openings 18a, 18b opened at the front and rear of the heat-insulating box 18 defining the cooling chamber 12, and are provided with the refrigerated showcase 1.
0 is freely slidable in the longitudinal direction (left-right direction in FIG. 3). At a predetermined position at the bottom of the cooling chamber 12, the cooling chamber 12 penetrates the heat insulating box 18.
A drain 28 is provided for discharging dew and the like accumulated inside to the outside.

In the machine room 14, as shown in FIG.
A cooling mechanism 16 including an evaporator 30, a condenser 32, a compressor 34, and the like is provided, and operation is controlled by a controller (not shown) to maintain the inside of the cooling chamber 12 at a set temperature. The evaporator 30 is disposed in a path for introducing air from the cooling chamber 12 and discharging the air to the cooling chamber 12, and is covered with an evaporator cover 48 which is adiabatically formed. In addition, the evaporator 30 is arrange | positioned at the substantially center of the longitudinal (left-right) direction of the machine room 14 (cooling chamber 12).

As shown in FIG. 5, a suction port 19 for sucking air in the cooling chamber 12 into the evaporator cover 48 is provided at a ceiling portion of the heat insulating box 18 at a position where the evaporator 30 is disposed. In the embodiment, the outlet 44 is formed near the center in the longitudinal direction corresponding to the outlet port for sending the cool air cooled by the evaporator 30 to the cooling chamber 12 side. It is formed at a position shifted to the right (or to the right) over a required length in the front-rear direction. At the bottom of the evaporator cover 48, a suction port 48a is formed corresponding to the suction port 19 of the heat-insulating box 18, and a delivery port 48b is formed corresponding to the delivery port 44. Port 48b
In addition, two fans 42 each having a motor 42a are provided apart from each other in the front-rear direction. That is, the fans 42, 4
2 operates, the air in the cooling chamber 12 is
After being sucked into the evaporator cover 48 through the suction port 48a and cooled by exchanging heat with the evaporator 30, the cooling chamber 1 is cooled through the delivery port 48b and the delivery port 44.
It is sent to two sides.

As described above, an outlet 44 and an inlet 19 for the cool air cooled by the evaporator 30 are provided at a predetermined position above the cooling chamber 12. A cooling air duct 46 is provided on the upper surface of the cooling chamber 12 (the inner ceiling surface of the heat insulating box 18) in order to efficiently perform the blowing and the suction into the suction port 19 of each other. As shown in FIG. 6, the cool air duct 46 has a bottom portion 46 a having a rectangular shape elongated in the left-right direction, in order to distribute the cool air sent from the outlet 44 in the left-right direction.
Side walls 46b, 46b are formed by bending both ends of the bottom portion 46a in the front-rear direction upward and extending upward, and have a substantially U-shaped cross-section opening upward. The cool air duct 46 covers the side walls 46b, 46b so as to substantially cover the outlet 44 and the inlet 19 from below.
The left and right air supply portions 54, 54 for blowing cool air in the left and right direction of the cooling chamber 12 are defined at both left and right end portions of the cool air duct 46, respectively. It has become so. That is, the cool air sent out from the outlet 44 hits the bottom 46a located immediately below, then splits in the left-right direction along the bottom 46a, and is blown out from the left and right air feeders 54, 54 into the cooling chamber 12. become.

The suction port 1 in the cold air duct 46
A suction portion 46c (shown in FIG. 6 with a plurality of through holes omitted) is formed in the bottom portion 46a corresponding to 9 in a plurality of through holes. Above the bottom 46a, a suction duct 56 serving as a box-shaped introduction portion that opens upward, which is shorter in the front-rear dimension than the cold air duct 46, is disposed substantially at the center in the front-rear direction. The portion 46c and the suction port 19 are connected to the internal space of the cool air duct 46.
It is configured to communicate with (a space through which cool air flows) in a state of being cut off. The suction duct 56 is provided with the suction portion 4.
An opening 56a is formed at a position corresponding to 6c, and the air in the cooling chamber 12 is sucked into the evaporator 30 through the suction portion 46c, the opening 56a, the suction port 19, and the suction port 48a. (See FIG. 5).

Above the bottom 46a of the cool air duct 46, between the suction duct 56 and immediately below the outlet 44 in the heat insulating box 18, as shown in FIG. A split plate 50 as a V-shaped guide member is provided. This dividing plate 50 is
The cool air discharged from the outlet 44 avoids the suction duct 56 and flows substantially uniformly toward both passages defined between the side walls 46b, 46b of the cool air duct 46 and the suction duct 56. It functions to guide and prevent the flow of cool air from being hindered by the suction duct 56.

As shown in FIG. 2, the length of the outlet 44 in the heat-insulating box 18 is set longer than the length of the cool air duct 46 in the front-rear direction. 46 are located outside the side walls 46b, 46b, respectively. That is, at the front and rear ends of the outlet 44, a front-rear air supply unit 5 that blows out the cool air discharged from the outlet 44 directly to the front and rear of the cooling chamber 12.
2,52 are defined. In addition, the front and rear air supply units 52, 52
The front and rear sliding doors 2 are configured to blow cold air downward.
6, 26 is not directly blown with cold air.

[0016]

Next, the operation of the duct structure according to the above-described embodiment will be described. When the power of the refrigerated showcase 10 is turned on and the fans 42, 42 rotate,
Due to the suction action, the air in the cooling chamber 12 is displaced as shown in FIG.
As shown in the figure, the air is sucked into the evaporator cover 48 through the suction portion 46c, the opening 56a, the suction port 19, and the suction port 48a located at the upper center thereof, and exchanges heat with the evaporator 30 to be cooled. .

The cool air cooled by the evaporator 30 is:
The cold air is delivered toward the cool air duct 46 through the delivery port 48b and the delivery port 44. As shown in FIG.
It collides with the bottom part 48a and is divided into right and left,
The air is blown into the cooling chamber 12 via the left and right air supply portions 54, 54 located on both sides in the (longitudinal) direction. In this case, the outlet 4
The suction duct 56 is provided between the air supply unit 4 and the right air supply unit 52, and obstructs the flow of cool air. However, since the dividing plate 50 is provided in the cool air duct 46 of the embodiment as described above, the cool air which is sent out from the outlet 44 and flows to the right side (the side of the suction duct 56) is separated by the dividing plate 50. , Are smoothly guided toward a passage defined between the suction duct 56 and the side walls 46b, 46b. Thereby, the cool air is blown out substantially uniformly from the left and right air supply sections 54, 54, and it is possible to prevent the occurrence of temperature unevenness on the left and right sides of the cooling chamber 12.

That is, a plurality of cool air outlets are provided at distant positions, and these outlets do not communicate with each other via a duct.
Only by providing the cool air duct 46 that covers the two outlets 44, the cool air discharged from the outlets 44 can be efficiently dispersed and blown in the left and right direction of the cooling chamber 12. Thereby, the duct structure is simplified, and the size of the cool air duct 46 itself can be reduced.

Further, the delivery port 4 of the evaporator cover 48 is provided.
A portion of the cool air sent from the outlet 8b to the outlet 44 is passed through the front and rear air sending portions 52, 52 defined at the front and rear ends of the outlet 44, and without passing through the cool air duct 46. It is blown directly before and after the cooling chamber 12. That is,
The cool air cooled by the evaporator 30 is blown to the front, rear, left and right of the cooling chamber 12 through one cool air duct 46,
The temperature of the cooling chamber 12 can be made uniform, and the manufacturing cost can be reduced.

The cool air blown into the cooling chamber 12 exchanges heat with the goods stored in the cooling chamber 12 and rises in temperature, and the cool air flows into the evaporator cover 48 again through the suction portion 46c and the like. Circulate to be inhaled. In this case,
Since the cool air is blown downward from above, the cooling chamber 1
Convection occurs naturally with the cool air whose temperature has increased due to the heat exchange in Step 2, and the cool air efficiently circulates through the cooling chamber 12 so that the cooling chamber 12 can be cooled efficiently. As shown in FIG. 2, the cool air blown out from the front and rear air supply units 52 and 52 into the cooling chamber 12 is in non-adiabatic contact with the external air, and is disposed before and after the heat loss is high. , 26 are prevented from directly hitting, so that heat loss of cold air can be prevented and more efficient cooling can be achieved.

[0021]

[Modification] In the above embodiment, the cooling air is supplied only from the front and rear air supply portions 52, 52 defined at the front and rear ends of the air outlet 44.
2, but as shown in FIG. 7,
A plurality of notches 4 are formed in the side walls 46b of the cold air duct 46.
6d may be formed, and the cool air once sent into the cool air duct 46 may be blown out of each of the cutouts 46d before and after the cooling chamber 12. That is, the notch 46d functions as a front-rear air supply unit for blowing cool air in the front-rear direction. In this case, the distribution amount of the cool air in the front-rear direction can be arbitrarily set / changed by the number of the notches 46d, and the cool air can be blown out more uniformly in all the front-rear and left-right directions. In FIG. 7, the suction portion 46c is illustrated with a plurality of through holes omitted.

In the embodiment, a separate suction duct is provided in the cold air duct to connect the cooling chamber and the evaporator cover. However, both ducts may be integrated. Also, without providing the front and rear air supply parts at the front and rear ends of the air outlet, the cool air is blown out to the front and rear of the cooling chamber only through the front and rear air supply parts including the cutouts formed in the side walls of the cool air duct as in the modified example. A configuration can be employed. Furthermore, in the embodiment, the case where the duct structure is employed in the refrigerated showcase has been described. However, the present invention is not limited to this, and is employed in a device such as a refrigerator or a freezer that needs to cool the cooling chamber. It is possible.

In the embodiment, the suction duct is disposed substantially at the center of the cold air duct in the front-rear direction, and a passage for the cool air is defined before and after the suction duct. May be arranged in contact with any one of the side walls before and after. In this case, if the guide member has a shape that guides the cool air to a passage defined in front or rear so as to avoid the suction duct, the guide member is substantially V-like as the dividing plate of the embodiment.
The plate does not have to be in the shape of a letter, and may be any plate that is inclined forward or backward.

[0024]

As described above, in the duct structure according to the present invention, by arranging the cool air duct on the inner ceiling surface of the box, the cool air discharged from the outlet is blown to the front, rear, left and right of the cooling chamber. Since the front and rear air supply sections and the left and right air supply sections are defined, the entire cooling chamber can be uniformly cooled by cool air sent from a single air outlet. That is, even in a horizontally long cooling chamber, there is no need to provide a plurality of outlets,
The reduction in the number of parts and the number of manufacturing steps is effective in reducing costs.

Further, by disposing a guide member between the introduction portion of the cool air duct and the outlet, the introduction portion for sucking air into the evaporator cover does not obstruct the flow of the cool air, and the cool air can be cooled. It can be uniformly blown out to the entire cooling chamber. That is, without providing a plurality of outlets for the cool air at distant positions and dispersing the cool air, it is possible to efficiently disperse the cool air in the front-rear and left-right directions simply by providing a cool air duct that substantially covers one outlet. The structure is simple and the size of the cool air duct can be reduced. Moreover, in the cooling chamber, a natural flow of the cool air is formed, in which the cool air flows from top to bottom, and the cool air (air) whose temperature has increased due to heat exchange in the cooling chamber flows from bottom to top. Efficient cooling becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire structure of a refrigerated showcase employing a duct structure according to a preferred embodiment of the present invention.

FIG. 2 is a side sectional view showing a refrigerated showcase according to the embodiment.

FIG. 3 is a partially cutaway front view of the refrigerated showcase according to the embodiment.

FIG. 4 is a plan view showing a cool air duct according to the embodiment.

FIG. 5 is a side sectional view of a main part showing a portion where a cool air duct is provided in a refrigerated showcase according to the embodiment.

FIG. 6 is an exploded perspective view showing a cool air duct and an evaporator cover in the refrigerated showcase according to the embodiment.

FIG. 7 is a perspective view showing a cool air duct according to a modification.

FIG. 8 is a partially cutaway perspective view showing the internal structure of a refrigerated showcase according to the related art.

[Explanation of symbols]

12 cooling room, 18 heat insulation box (box), 19 suction port, 3
0 evaporator 44 outlet, 46 cool air duct, 46b side wall, 46d
Notch (front and rear air supply section) 48 Evaporator cover, 50 split plate (guide member), 52 front and rear air supply section 54 left and right air supply section, 56 suction duct (introduction section)

Claims (4)

[Claims] An air in a cooling chamber (12) defined inside a box (18) is cooled by exchanging heat with an evaporator (30), and the cold air is supplied to the cooling chamber (12). A duct structure for blowing out, which is disposed above the box (18) and communicates with the cooling chamber (12),
An evaporator cover (48) containing the evaporator (30) therein.
Cold air formed at the ceiling of the box (18), and cooled by the suction port (19) and the evaporator (30) for sucking the air in the cooling chamber (12) into the evaporator cover (48). A cooling air duct (46) at a position corresponding to the inlet (19) and the outlet (44) on the inner ceiling of the box (18). A front-rear air supply unit configured to blow cool air sent out from the outlet (44) to the front, rear, left and right of the cooling chamber (12).
(52, 52) and left and right air supply portions (54, 54), and an inlet (19) of the box (18) in the cold air duct (46).
And a space for cold air flowing in the cold air duct (46) is cut off from the introduction portion (56) for guiding the air in the cooling chamber (12) to the suction port (19). A duct structure characterized by comprising. 2. An introduction part (56) in the cold air duct (46).
A guide member for guiding the cool air flowing from the outlet (44) toward the introduction part (56) between the outlet (44) and the outlet (44) of the box (18) so as to avoid the introduction part (56). 50. The duct structure according to claim 1, wherein the duct structure is provided. The length of the outlet (44) of the box (18) in the front-rear direction is set to be longer than the length of the cool air duct (46) in the front-rear direction. The duct structure according to claim 1 or 2, wherein the front and rear air supply portions (52, 52) are defined at both front and rear ends. 4. A front and rear side wall (46b, 4b) of the cold air duct (46).
The duct structure according to any one of claims 1 to 3, wherein a front and rear air supply part (46b) communicating with the cooling chamber (12) is formed in 6b).