JP3510122B2 - Refrigeration equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, there is known a refrigerating apparatus having a plurality of refrigerating chambers that are insulated from each other, and a refrigerating circuit is individually provided for each refrigerating chamber and the refrigerating circuits are arranged side by side in a common machine room. . The refrigeration circuit used in such a refrigerating apparatus generally circulates and connects a compressor, a condenser, an evaporator and the like with a refrigerant pipe, while covering the evaporator with a cover so as to shield it 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 activated, the cold air generated by the evaporator is blown into the refrigerating chamber by the internal fan, and then the internal air is drawn to the suction side of the evaporator. A flow is generated, so that the refrigerating compartment is cooled. On the other hand, it is necessary to cool the condenser while the refrigeration circuit is operating.Therefore, a condenser fan is provided to cool the condenser by sucking the outside air and applying it to the condenser, and then applying the exhaust air to the compressor. It is used for cooling and then discharged outside the machine.

[0003]

However, as described above, when a plurality of refrigerating circuits are housed in the common machine room, the intake and exhaust air from the condenser fan goes in and out between the adjoining refrigerating circuits, and each refrigerating circuit is cooled. 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, impairing the durability of the components, and that the temperature value of the evaporator becomes high and the refrigerating capacity decreases. It was The present invention has been completed based on the above circumstances, and an object thereof is to block the flow of air between adjacent refrigeration circuits.

[0004]

As a means for achieving the above object, the invention of claim 1 is provided with a plurality of refrigerating chambers insulated from each other, and a compressor and a condenser are provided for each refrigerating chamber. In a refrigerating device in which a refrigerating circuit including an evaporator and an evaporator is individually provided and each refrigerating circuit is housed in a common machine room, the refrigerating circuit includes a condenser and a condenser for air-cooling the condenser. While the fan and the compressor are sequentially arranged, an evaporator is arranged in the vicinity of the fan and the evaporator is covered with a cover.
The refrigerating circuits are arranged side by side so that the evaporator with the cover is sandwiched between adjacent refrigerating circuits, and the cover serves to block the flow of air between the adjoining refrigerating circuits. It is characterized by A second aspect of the present invention is characterized in that, in the first aspect, a shielding plate that blocks the blast is provided between the condensers of the adjacent refrigeration circuits.

[0005]

<Advantages and effects of the invention><Invention of claim 1> Even when a plurality of refrigerating circuits are simultaneously operated, the cover of the evaporator arranged between the adjoining refrigerating 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> It is possible to more reliably block the airflow between adjacent refrigeration circuits.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to a hot and cold distribution vehicle 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 vehicle of this embodiment includes a storage chamber main body 1 (hereinafter, simply referred to as a main body) formed of a rectangular heat insulating box having front and rear surfaces opened. A caster 2 is provided on the bottom surface, and a machine room 3 is provided on the top surface. Body 1
The inside is divided into three rooms by the heat insulation wall in the left-right direction,
Further, each room is divided into two on the left and right by a heat insulating partition wall to form a total of 6 rooms, and in order from the left side in FIG. 1, the heating room 5A, the two refrigerating rooms 6A and 6B, and the two The hot storage rooms 5B and 5C and the cold storage room 6C are provided. In these, the adjacent warm storage room 5 and cold storage room 6 form a pair, and each is equipped with a double door 8 that opens.

Each refrigerating room 6 will be described in detail below.
The two refrigerating chambers 6A and 6B arranged side by side on the left side are shared by the first refrigerating circuit 11 and the refrigerating chamber 6C at the right end is cooled by the second refrigerating circuit 12. The circuits 11 and 12 are housed in the machine room 3. Regarding the heating room 5, the leftmost heating room 5A
The two heating chambers 5B and 5C arranged side by side on the right side are each heated by a heating chamber unit (not shown) housed in the machine chamber 3.

A shelf 9 is formed over a plurality of stages in the above-mentioned paired heating chamber 5 and cooling chamber 6 (see FIG. 3). On the other hand, the tray 10 is arranged so that foods served in a cold state and foods served in a warm state are separately placed on both sides of the boundary portion. By being 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 refrigerating chamber 6 and the hot food is stored in the warming chamber 5, respectively, and refrigerated or warmed. It is made to store.

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

On the other hand, as shown in FIG. 3, the heat insulating wall 21 disposed between the above two refrigerating chambers 6A and 6B has two ducts 22 formed on both sides thereof with ventilation holes 23 formed in front and rear thereof. It is configured by opening and installing. An opening 25 extending from the duct 22 to the refrigerating chamber 6A on the left side of the figure is formed on the upper surface of the main body 1, and the opening 25 extends through the box-shaped cover 2
An evaporator chamber 27 is defined by being covered with 6. A mounting plate 28 is fitted in the opening 25, a suction port 29 is opened at the left end of the mounting plate 28, and an air outlet 30 is provided at a position corresponding to the upper side of each duct 22. Is opened. The above-mentioned evaporator 17 is installed on the mounting plate 28 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 of the air outlets 30. Then, the internal fan 31 is attached. Further, as shown in FIG. 2, an intake port 33 is opened in the rear surface 3A of the machine room 3 so as to correspond to the rear of the condenser 15, and the upper surface of the compressor 14 on the ceiling surface is provided with the intake port 33. The exhaust port 34 is opened as shown by the chain line.

The second refrigerating circuit 12 for cooling the refrigerating compartment 6C at the right end is installed in the region on the right side in the machine compartment 3 in substantially the same arrangement as the first refrigerating circuit 11 described above. To repeat, the cover 26 in the first refrigeration circuit 11
On the right side across the condenser, the condenser 1
5, the condenser fan 19 and the compressor 14 are installed, and the evaporator 17 is arranged on the right side thereof.
Similarly, the evaporator 17 is covered with a cover 26, and an internal fan 31 is provided on the left side of the evaporator 17. Although not shown, the internal fan 31 is provided on the left side of the refrigerating chamber 6C at the right end. Cold air is blown out and the inside air is sucked into the suction side of the evaporator 17 from the right side surface.

On the rear surface 3A of the machine room 3, the condenser 1 is also provided.
5, an intake port 33 is opened corresponding to the rear of the exhaust port 5, and the exhaust port 3 is provided above the compressor 14 on the ceiling surface.
4 is opened. 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 central portion of the cover 26 in the lateral width direction, a shielding plate 36 is stretched over the entire height.

This embodiment has the above-mentioned structure,
Next, the operation will be described. When cooling the refrigerating chambers 6A to 6C, both the refrigerating circuits 11 and 12 and the in-compartment fan 31 provided in each are driven. First refrigeration circuit 11
On the side, the cold air generated near the evaporator 17
The cool air blown into the duct 22 by the internal fan 31 is blown into the left and right refrigerating chambers 6A and 6B through the vents 23 while descending in the duct 22, and the cold air blown to the left refrigerating chamber 6A continues to be the left refrigerating chamber. The cold air that has risen in 6A and has been blown into the refrigerating chamber 6B on the right side is discharged from both ducts 2
After passing through the gap between the two refrigerating chambers 6A on the left side, it rises in the same manner and is circulated through the suction port 29 to the evaporator 17 side.
Is cooled. On the second refrigeration circuit 12 side, cold air generated in the vicinity of the evaporator 17 is blown into the left side surface of the refrigerating chamber 6C by the internal fan 31, and the internal air flows from the right side surface to the suction side of the evaporator 17. A circulating flow such as being introduced is generated, so that the refrigerating chamber 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 ports 33 of the rear surface 3A of the machine chamber 3, and the condenser 15 is cooled by passing through the condenser 15, and further hits the compressor 14. After the compressor 14 is cooled by, the exhaust gas is discharged out of the machine through the exhaust port 34 on the ceiling surface. By the way, since the two refrigeration circuits 11 and 12 are installed side by side in the common machine room 3, when both condenser fans 19 are driven, the outside air drawn by one of the condenser fans 19 is discharged. 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 other refrigeration circuit. There is a risk of going in and out between.

However, in this embodiment, the cover 26 of the evaporator 17 of the first refrigeration circuit 11 is
12 are provided so as to block the space between the two, and a shield plate 36 is provided between the cover 26 and the rear surface 3A of the machine room 3. , 12 is avoided.
Therefore, both refrigeration circuits 11 and 12 can exhibit a cooling capacity that is almost the same as when they are operated independently even when they are operated at the same time, and that overload acts on the components. Can be avoided.

<Modification> The shield plate disposed between the condensers 15 of both refrigeration circuits 11 and 12 is the first refrigeration line as shown by the one-dot chain line or two-dot chain line shield plates 36A and 36B in FIG. It may be provided from the left and right side surfaces of the cover 26 of the evaporator 17 in the circuit 11 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 this second embodiment, two refrigeration circuits 41, 42 are housed side by side in the same machine room 40, which is similar to the first embodiment, but the arrangement of each refrigeration circuit 41, 42 itself is different. Is different. That is, in the refrigerating circuits 41 and 42 of this embodiment, the condensers 44, the condenser fan 45, the compressor 46, and the cover 48 forming the evaporator chamber 47 are provided in a line, and the evaporator 48 is provided in the cover 48. And the internal fan 50 are housed. The surface of the cover 48 on the compressor 46 side is a guide surface 51 having an upward slope.

These two refrigerating circuits 41 and 42 are arranged side by side in the lateral direction with the cover 48 arranged to the right.
It is housed inside. Further, as shown in FIG. 4, intake ports 53 are opened on both front and rear surfaces of the machine room 40 at positions corresponding to the condensers 44 of the respective refrigeration circuits 41, 42, and the ceiling surface is provided with each of the intake ports 53. An exhaust port 54 is opened at each position in the refrigeration circuits 41, 42 corresponding to between the compressor 46 and the cover 48.

When the condenser fan 45 is driven along with the operation of the refrigeration circuits 41, 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, and further, when the compressor 46 is cooled by hitting the compressor 46, the exhaust gas is directed along the guide surface 51 of the cover 48. It is discharged to the outside of the machine from the exhaust port 54 on the ceiling surface. Also in the second embodiment, the cover 48 of the evaporator 49 in the refrigeration circuit 41 on the left side has a function of blocking between the refrigeration circuits 41 and 42, and the intake and exhaust of the condenser fan 45 causes the refrigeration circuits 41 and 42 to pass. Access 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 to the above, various modifications 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 side by side in a common machine room. (2) Further, the present invention is not limited to the hot / cold distribution vehicle exemplified in the above-described embodiment, but in short, can be widely applied to all refrigeration apparatuses in which a plurality of refrigeration circuits are housed side by side in a common machine room.

[Brief description of drawings]

FIG. 1 is a front view of a heating / cooling vehicle according to a first embodiment of the present invention.

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

FIG. 3 is a sectional view showing a cold air circulation structure in a refrigerating room.

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

FIG. 5 is a vertical 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

Front Page Continuation (72) Inventor Fumiyuki Hori, 3-16 Hoshizaki Electric Co., Ltd., Sakaemachi South Building, Toyoake City, Aichi Prefecture (72) Inventor Hatsuo Yamada 16-3, South Building Sakaemachi, Toyoake City, Aichi Prefecture Hoshizaki Electric Co., Ltd. (72) Inventor Sono Kato 16-16 Hoshizaki Electric Co., Ltd., South Building, Sakaemachi, Toyoake City, Aichi Prefecture (56) References: 60-48075 (JP, U) 60-28378 (JP, U) ) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25D 19/00 560

Claims (2)

(57) [Claims] 1. A plurality of refrigerating chambers insulated from each other are provided, and a refrigerating circuit including a compressor, a condenser, an evaporator, etc. is individually provided for each refrigerating chamber, and each refrigerating circuit is a common machine room. In the refrigerating apparatus housed in, the refrigeration circuit, a condenser, a condenser fan for air cooling the condenser, and a compressor are sequentially arranged,
An evaporator is arranged in the vicinity of these, and the evaporator is covered with a cover, and each refrigeration circuit is provided side by side so that the evaporator with the cover is sandwiched between adjacent refrigeration circuits. The refrigerating apparatus is characterized in that the cover has a function of shutting off the air flow between adjacent refrigeration circuits. 2. The refrigerating apparatus according to claim 1, further comprising a shield plate provided between adjacent condensers of the refrigerating circuits to block the flowing air.