JP2000111233A - Refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent suction/exhaust air from going in/out in refrigeration circuits adjacent to each other. SOLUTION: Two refrigeration circuits 11, 12 are juxtaposed inside a common machine room 3. In this situation, a cover 26 of an evaporator 17 in one refrigeration circuit 11 is arranged so as to be interposed between both refrigeration circuits 11, 12. A shield plate 36 is put up between the cover 26 and a rear face 3A of the machine room 3. When condenser fans 19 of both refrigeration circuits 11, 12 are driven, the outside air is sucked from intake openings 33 of the rear face 3A of the machine room 3 to cool condensers 15, and exhaust air is exhausted from exhaust openings 34 of a ceiling face to the outside of the machine after compressors 14 are cooled. At that time the cover 26 of the evaporator 17 of the refrigeration circuit 11 is arranged so as to interrupt between both refrigeration circuits 11, 12, and since the shielding plate 36 is provided between the cover 26 and the rear face 3A of the machine room 3, the situation in which suction/exhaust air by each condenser fan 19 goes in/out between both refrigeration circuits 11, 12 is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a plurality of refrigeration circuits housed in a common machine room.

[0002]

2. Description of the Related Art Conventionally, a refrigerating apparatus having a structure in which a plurality of refrigerating chambers insulated from each other are provided, a refrigerating circuit is individually provided for each refrigerating chamber, and these are arranged and housed in a common machine room is known. . In general, a refrigeration circuit used in such a refrigeration apparatus connects a compressor, a condenser, an evaporator, and the like with a refrigerant pipe while circulating the refrigerant, and covers the evaporator with a cover to shut off the evaporator from the outside air. It has a structure that communicates with the room, and has an internal fan inside the cover. Then, when the refrigeration circuit and the internal fan are started, the cool air generated by the evaporator is blown into the refrigerator compartment by the internal fan, and then the cool air is circulated such that the internal air is drawn to the suction side of the evaporator. A flow is generated, so that the refrigerator compartment is cooled. On the other hand, it is necessary to cool the condenser while the refrigeration circuit is operating.Therefore, the condenser is equipped with a condenser fan, which cools the outside air by sucking it and applying it to the condenser. After being used for cooling, it is discharged outside the machine.

[0003]

However, as described above, when a plurality of refrigeration circuits are accommodated in a common machine room, the intake and exhaust of the condenser fan enter and exit between adjacent refrigeration circuits, and each refrigeration circuit enters and exits. There is a possibility that the characteristics of the circuit may change. Specifically, there are problems that the pressure and temperature values of the discharge pipe of the compressor become too high, thereby deteriorating the durability of the component parts, and increasing the temperature value of the evaporator, thereby lowering the refrigerating capacity. Was. The present invention has been completed based on the above circumstances, and an object of the present invention is to shut off a flow of wind between adjacent refrigeration circuits.

[0004]

According to a first aspect of the present invention, there is provided a refrigerator having a plurality of refrigerator compartments which are insulated from each other, and a compressor and a condenser for each refrigerator compartment. And a refrigeration apparatus in which refrigeration circuits each including an evaporator and the like are individually provided, and each refrigeration circuit is housed in a common machine room, wherein the refrigeration circuit includes a condenser and a condenser for air-cooling the condenser. While the fan and the compressor are arranged in order, an evaporator is arranged in the vicinity of the fan and the compressor, and the evaporator is covered with a cover.
Each refrigeration circuit is provided side by side so as to sandwich the evaporator with the cover between adjacent refrigeration circuits, and the cover functions to block the flow of air between the adjacent refrigeration circuits. It has features. A second aspect of the present invention is characterized in that, in the first aspect, a shielding plate for blocking flowing air is provided between the condensers of adjacent refrigeration circuits.

[0005]

<Effects and Effects of the Invention><Invention of claim 1> Even when a plurality of refrigeration circuits are operated at the same time, the cover of the evaporator disposed between the adjacent refrigeration circuits is sucked by the condenser fan. It is possible to prevent flowing air such as exhaust gas from flowing between adjacent refrigeration circuits, and to prevent the characteristics of each refrigeration circuit from changing as much as possible. <Invention of claim 2> A flow between adjacent refrigeration circuits can be more reliably blocked.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a hot and cold serving car will be described below with reference to the accompanying drawings. <First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the hot and cold serving car of this embodiment includes a storage room main body 1 (hereinafter, simply referred to as a main body) formed of a rectangular heat-insulating box having front and rear openings. A caster 2 is provided on the bottom surface, and a machine room 3 is provided on the upper surface. Body 1
The interior is divided into three rooms in the left and right direction by heat insulating walls,
Further, each room is partitioned into two on the left and right sides by a heat insulating partition wall to form a total of six rooms, and sequentially from the left side in FIG. 1, a warming room 5A, two cold rooms 6A, 6B, two The storage compartments 5B and 5C and the refrigerator compartment 6C are provided. Adjacent warming room 5 and cold room 6 form a pair, and each is equipped with a double door 8.

[0007] Each refrigerator compartment 6 has a
The two refrigerator chambers 6A and 6B arranged on the left side are cooled by sharing the first refrigeration circuit 11, and the refrigerator chamber 6C on the right end is cooled by the second refrigeration circuit 12. The circuits 11 and 12 are housed in the machine room 3. In addition, about the storage room 5, the storage room 5A of the left end
And two storage rooms 5B and 5C arranged on the right side are heated by a storage room unit (not shown) housed in the machine room 3, respectively.

The above-mentioned paired warming room 5 and cold room 6 have shelves 9 formed in a plurality of stages (see FIG. 3). On the other hand, the tray 10 is configured such that food provided in a cold state and food provided in a warm state are separately placed on both sides of the boundary section, and the tray 10 is placed on the boundary section. Is placed on the shelf 9 while penetrating the partition wall at the point of, the cold food placed on one tray 10 is stored in the cold storage room 6, and the hot food is stored in the hot storage room 5, respectively. The storehouse is being made.

Next, the arrangement of the refrigeration circuits 11 and 12 will be described in detail. As shown in FIG. 2, each of the refrigeration circuits 11 and 12 includes a compressor 14, a condenser 15, and an expansion valve 16.
And the evaporator 17 is circulated and connected by a refrigerant pipe 18. The first refrigeration circuit 11 shared by the two refrigerator compartments 6A and 6B on the left side is installed in the left region in the machine room 3. Specifically, on the left side in the machine room 3,
A condenser 15, a condenser fan 19, and a compressor 14 are sequentially installed from the rear side (the upper side in FIG. 2).
An evaporator 17 is disposed on the right side.

On the other hand, as shown in FIG. 3, a heat insulating wall 21 disposed between the two refrigerator compartments 6A and 6B is provided with a space between two front and rear ducts 22 having ventilation holes 23 formed on both sides. It is configured by opening and installing. An opening 25 is formed on the upper surface of the main body 1 from the duct 22 to the refrigerator compartment 6A on the left side of FIG.
The evaporator chamber 27 is defined by being covered with 6. A mounting plate 28 is fitted into the opening 25, and a suction port 29 is opened at the left end of the mounting plate 28, and an outlet 30 is provided at a position corresponding to above each duct 22. Is open. On the mounting plate 28, the above-described evaporator 17 is installed at a position closer to the duct 22 side than the suction port 29, and the surface of the evaporator 17 on the duct 22 side corresponds to each outlet 30. The inside fan 31 is attached. In addition, as shown in FIG. 2, an intake port 33 is opened at the rear surface 3A of the machine room 3 corresponding to the rear of the condenser 15 and at a position above the compressor 14 on the ceiling surface. The exhaust port 34 is opened as shown by the dashed line.

A second refrigeration circuit 12 for cooling the rightmost refrigeration compartment 6C is disposed in the same region as the first refrigeration circuit 11 in the right region in the machine compartment 3. By repeating, the cover 26 in the first refrigeration circuit 11
On the right side with the condenser 1 in order from the rear side
5. The condenser fan 19 and the compressor 14 are installed, and the evaporator 17 is arranged on the right side thereof.
The evaporator 17 is similarly covered by a cover 26, and an in-compartment fan 31 is provided on the left side of the evaporator 17, and although not shown, the in-compartment fan 31 is provided on the left side of the refrigerator compartment 6C at the right end. Cold air is blown out, and air in the refrigerator is sucked into the suction side of the evaporator 17 from the right side.

Similarly, a condenser 1 is provided on the rear surface 3A of the machine room 3.
5, an intake port 33 is opened, and an exhaust port 3 is provided above the compressor 14 on the ceiling surface.
4 is open. Further, between the rear surface of the cover 26 in the first refrigeration circuit 11 and the rear surface 3A of the machine room 3,
At the center in the width direction of the cover 26, a shielding plate 36 is stretched over the entire height.

This embodiment has the above structure,
Subsequently, the operation will be described. When cooling the refrigerating compartments 6A to 6C, both the refrigerating circuits 11, 12 and the in-compartment fan 31 provided for each of them are driven. First refrigeration circuit 11
On the side, the cool air generated near the evaporator 17 is
The cold air blown into the duct 22 by the in-compartment fan 31 and blown down the duct 22 to the left and right refrigerating compartments 6A and 6B through the ventilation port 23 while descending in the duct 22, and the cold air blown out to the left refrigerating compartment 6A continues to the left refrigerating compartment. 6A, the cold air blown into the refrigerator compartment 6B on the right side flows into both ducts 2A.
After flowing to the left refrigerator compartment 6A through the gap between the two, it rises in the same way, and generates a circulating flow such that it is guided from the suction port 29 to the evaporator 17 side, and thus both refrigerator compartments 6A, 6B
Is cooled. On the second refrigeration circuit 12 side, cool air generated in the vicinity of the evaporator 17 is blown into the left side of the refrigerator compartment 6C by the in-compartment fan 31, and the in-compartment air flows from the right side to the suction side of the evaporator 17. A circulating flow, such as being guided, is generated, whereby the refrigerator compartment 6C is cooled.

When the two refrigeration circuits 11 and 12 are driven, the condenser fan 19 mounted on them is also driven. When the condenser fan 19 is driven, the outside air is sucked through the intake port 33 on the rear face 3A of the machine room 3 and passes through the condenser 15, thereby cooling the condenser 15 and further hitting the compressor 14. After the compressor 14 is cooled by the exhaust gas, the exhaust gas is exhausted outside from the exhaust port 34 on the ceiling surface. By the way, since the two refrigeration circuits 11 and 12 are arranged side by side in the common machine room 3, when both condenser fans 19 are driven, the outside air drawn by one condenser fan 19 When part of the exhaust gas goes to the condenser 15 side of the other refrigeration circuit, and part of the exhaust gas goes to the compressor 14 side of the opposite refrigeration circuit, the intake and exhaust of both refrigeration circuits 11 and 12 occur. There is a risk of getting in and out of the room.

However, in the present embodiment, the cover 26 of the evaporator 17 of the first refrigeration circuit 11 is
12, and a shielding plate 36 is provided between the cover 26 and the rear surface 3A of the machine room 3, so that the intake and exhaust of the condenser fan 19 can be performed by the two refrigeration circuits 11 , 12 are avoided.
Therefore, even when both refrigeration circuits 11 and 12 are operated at the same time, they can exhibit substantially the same cooling capacity as when they are operated alone, and overload acts on the components. Can also be avoided.

<Modification> The shielding plate disposed between the condensers 15 of both the refrigeration circuits 11 and 12 is a first refrigeration circuit as shown by the dashed line or two-dot chain line shielding plates 36A and 36B in FIG. The circuit 11 may be provided from the left and right side surfaces of the cover 26 of the evaporator 17 toward the rear surface 3A of the machine room 3.

<Second Embodiment> FIGS. 4 and 5 show a second embodiment of the present invention. In the second embodiment, the two refrigeration circuits 41 and 42 are housed side by side in the same machine room 40 as in the first embodiment, but the arrangement of the refrigeration circuits 41 and 42 itself is different. Is different. That is, in the refrigeration circuits 41 and 42 of this embodiment, the condensers 44, the condenser fan 45, the compressor 46, and the covers 48 constituting the evaporator chamber 47 are provided in a line, and the evaporators 49 are provided in the covers 48. And a fan 50 in the refrigerator. The surface of the cover 48 on the compressor 46 side is a guide surface 51 having an upward slope.

The two refrigeration circuits 41 and 42 are arranged side by side in a horizontal direction with the cover 48 disposed to the right.
Housed within. As shown in FIG. 4, intake ports 53 are opened at both front and rear sides of the machine room 40 at positions corresponding to the condensers 44 of the refrigeration circuits 41 and 42, respectively. An exhaust port 54 is opened at each position corresponding to a position between the compressor 46 and the cover 48 in the refrigeration circuits 41 and 42.

When the condenser fans 45 are driven in association with the operation of the refrigeration circuits 41 and 42, outside air is sucked through the intake ports 53 on the front and rear surfaces of the machine room 40, respectively.
After passing through the condenser 44 while being bent at a substantially right angle, the condenser 44 is cooled. Further, the compressor 46 is cooled by hitting the compressor 46, and then the exhaust gas is directed along the guide surface 51 of the cover 48. The air is exhausted from the ceiling through an exhaust port 54. Also in the second embodiment, the cover 48 of the evaporator 49 in the left refrigeration circuit 41 has a function of shutting off between the two refrigeration circuits 41 and 42, and the intake and exhaust of the condenser fan 45 causes the two refrigeration circuits 41 and 42 to operate. Getting in and out between 42 is avoided.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) The present invention is also applicable to a case where three or more refrigeration circuits are arranged and accommodated in a common machine room. (2) The present invention is not limited to the hot / cold serving truck exemplified in the above embodiment, but can be widely applied to all refrigeration apparatuses in which a plurality of refrigeration circuits are arranged and housed in a common machine room.

[Brief description of the drawings]

FIG. 1 is a front view of a hot / cold serving car according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view showing the structure inside the machine room.

FIG. 3 is a cross-sectional view showing a cool air circulation structure in the refrigerator compartment.

FIG. 4 is a plan view showing a structure inside a machine room according to a second embodiment.

FIG. 5 is a longitudinal sectional view thereof.

[Explanation of symbols]

3 ... machine room 3A ... rear surface 6A-6C ... refrigerator room 11,
12 Refrigeration circuit 14 Compressor 15 Condenser 17
Evaporator 19 ... Condenser fan 26 ... Cover 33 ... Intake port 34 ... Exhaust port 36 ... Shielding plate 36A,
36B ... Shielding plates 41, 42 ... Refrigeration circuit 44 ... Condenser 45 ... Condenser fan 46 ... Compressor 48 ... Cover
49: evaporator 53: intake port 54: exhaust port

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Ito 3-16 Hoshizaki Electric Co., Ltd., Sakaemachi Minamikan, Toyoake City, Aichi Prefecture (72) Inventor Fumiyuki Hori 16-16 Hoshizaki Electric Co., Ltd., Sakamachi Town, Toyoake City, Aichi Prefecture Inside the company (72) Inventor Hatsuo Yamada 3-16 Hoshizaki Electric Co., Ltd., 3rd building, Sakaemachi, Toyoake-shi, Aichi Prefecture (72) Inventor Sonio Kato 3rd 16th, Hoshizaki Electric Co., Ltd., Sakaemachi, Toyoake-shi, Aichi

Claims (2)

[Claims] 1. A refrigerator comprising: a plurality of refrigerator compartments insulated from each other; and a refrigeration circuit comprising a compressor, a condenser, an evaporator and the like provided individually for each refrigerator compartment. In the refrigeration apparatus accommodated in the above, the refrigeration circuit, while a condenser, a condenser fan for air-cooling the condenser, and a compressor are sequentially arranged,
An evaporator is arranged in the vicinity thereof, and the evaporator is covered with a cover. Each of the refrigeration circuits is provided side by side so as to sandwich the evaporator with the cover between adjacent refrigeration circuits. A refrigeration unit, wherein the cover has a function of blocking flowing air between adjacent refrigeration circuits. 2. The refrigeration apparatus according to claim 1, wherein a shielding plate for blocking flowing air is provided between the condensers of the adjacent refrigeration circuits.