JP2944355B2 - Cooling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system comprising a plurality of refrigerating cycles constituted by a plurality of compressors.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open Publication No.
In the cooling storage as disclosed in Japanese Patent Application Laid-Open Publication No. H11-260, the inside of the storage is cooled by a cooling device having a well-known refrigeration cycle by connecting a compressor and a condenser by piping. In addition, when the temperature inside the refrigerator is precisely controlled, when the volume inside the refrigerator is large, or when the refrigerator is divided into a plurality of chambers and the temperature of each room is controlled separately, a plurality of compression chambers are required. A plurality of refrigeration cycles are respectively constituted by the machines, and the inside of the refrigerator can be strongly or independently cooled by a cooler of each refrigeration cycle.

FIG. 6 shows a plan view of a ceiling portion of a conventional cooling storage 100. As shown in FIG. The cooling storage 100 is constituted by a heat-insulating box 101 opened to the front.
A rectangular opening 103 is formed in the top wall 102, and a heat insulating plate 104 is attached so as to close the opening 103. Reference numeral 105 denotes a control panel, and reference numeral 106 denotes an electrical box.

On the upper surface of the heat insulating plate 104, two compressors 107 and 108 are installed.
Terminal portions 1 with built-in power supply terminal plates from the outer surfaces of 7 and 108
09 and 109 are formed so as to protrude outward, respectively, and the discharge-side pipe 110 and the suction-side pipe 111 protrude outward from the outer surfaces of the compressors 107 and 108 on the opposite sides of the terminal portions 109 and 109. Is formed. Suction pipes 112, 112 are connected to the suction side pipes 111, respectively.
4 through the insertion holes 113 and 114 formed in the heat insulating box 10.
1 and connected to coolers 115 and 116 disposed inside the refrigerator, which is the lower surface of the heat insulating plate 104, respectively.

On the other hand, the discharge pipe 110 of each of the compressors 107 and 108 is connected to a condensing pipe (not shown).
The condensing pipes are inserted into plate-fin type condensers 118 and 119 which are stacked one above the other, and then enter the inside of the refrigerator and are connected to the respective coolers 115 and 116 via a pressure reducing device (not shown). ing. With such piping connections, the compressors 107 and 108 constitute well-known refrigeration cycles 121 and 122, respectively, whereby the cooling storage 100 is equipped with two independent refrigeration cycles 121 and 122. In addition, the condensers 118 and 119 are stacked one on top of the other.
And 108, the condenser 1
A blower 124 is installed on the rear side of 18, 18.

In this configuration, the high-temperature refrigerant discharged from the discharge pipes 110, 110 of the compressors 107, 108 respectively flows into the condensers 118, 119. When the blower 124 is operated, the air is sucked in from the front and discharged to the rear, so that the outside air is passed through the condensers 118 and 119, and the refrigerant flowing into the condensers 118 and 119 is air-cooled by the ventilation and radiates heat. Condense. The condensed refrigerant is decompressed by the decompression device, and then cooled.
15 and 116, respectively, to evaporate and cool the inside of the refrigerator. Then, the refrigerant flowing out of the coolers 115 and 116 passes through the suction pipes 112 and 112, respectively, and is sucked into the compressors 107 and 108 from the suction-side pipes 111 and 111, respectively.

[0007]

However, the positional relationship between the compressors 107 and 108 with respect to the blower 124 has not been determined in the past, and the suction pipes 112 and 11 of both the refrigeration cycles 121 and 122 are exclusively used for the sake of design.
The two coolers 115 and 116 and the compressors 107 and 108 are located at the same position so that the shapes of the two are common. Therefore, as shown in FIG.
The terminal portions 109 and 109 of the compressors 108 and 108 are directed, for example, to the front right, and a large space is formed between the compressors 107 and 109.

When the blower 124 is operated in this installation mode, the outside air flowing through the condensers 118 and 119 is supplied to the blower 12
4, the vehicle almost passes between the compressors 107 and 108 as indicated by the arrow in the figure. Also,
When one of the compressors 107, 108 is arranged so as to be close to the blower 124, the other compressor 108, 1
Almost no outside air hits 07. Therefore, the compressor 10
Insufficient cooling of the compressors 7 and 108 causes the temperature of the compressors 107 and 108 to rise, which may cause damage to the compressors due to burnout of windings, increase in power consumption and decrease in cooling capacity. .

In order to solve this problem, for example, as shown in FIG. 7, a compressor 107 is installed close to the compressor 108 so that the wind from the blower 124 is blown to both sides as shown by the arrow in the figure. Then, the high pressure pipe 126 connecting the discharge side pipe 110 of the compressor 107 and the condensation pipe inserted into the condenser 118 is connected to the suction pipe 1 of the compressor 108.
Such an arrangement was practically impossible because of the contact with the surface 12.

The present invention has been made to solve the above-mentioned conventional technical problem, and comprises a plurality of refrigerating cycles constituted by a plurality of compressors, wherein a condenser of each refrigerating cycle is used as a common blower. It is an object of the present invention to provide a cooling device that cools each compressor smoothly by air cooling.

[0011]

The cooling device 1 according to the present invention comprises:
By connecting a plurality of compressors 17 and 18 by piping, a plurality of refrigeration cycles 46 and 47 are configured, respectively.
The condensers 3 and 4 (5) of the refrigerating cycles 47 and 48 are air-cooled by a common blower 44, and the compressors 17 and 18 are cooled by cooling air from the blower 44.
Each of the compressors 17 and 18 has an outwardly protruding terminal portion 19 and 1.
9 and refrigerant pipes 21 and 22 protruding outward from the opposite sides of the terminal portions 19 and 19, and the terminal portions 19 and 19 are directed toward the blower 44 and are close to each other. It is characterized by being installed so that it may be.

[0012]

According to the cooling device 1 of the present invention, the condensers 3, 4 (5) of each of the refrigeration cycles 46, 47 are air-cooled by the common blower 44. The cooling air from the blower 44 cools the compressors 17 and 18, and the cooling air from the
18 is installed such that its terminal portions 19, 19 are directed toward the blower 44 and are close to each other,
Each compressor 17, which protrudes from the opposite side of the terminal portion 19, 19,
Conversely, the refrigerant pipes 21 and 22 of 18 will be separated from each other. Therefore, the compressors 17 and 18 can be installed close to each other, and the cooling air from the blower 44 can be strongly blown to both the compressors 17 and 18, and
The wind from the blower 44 is blown off by the terminal portions 19, 19 protruding outward from the compressors 17, 18, so that the air flows smoothly along the outer surfaces of the compressors 17, 18, respectively. Therefore, the cooling of the compressors 17 and 18 can be favorably achieved by the common (single) blower 44.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cooling storage 2 equipped with a cooling device 1 of the present invention.
FIG. 2 is a vertical sectional side view of the cooling storage 2;
FIG. 3 shows a perspective view of the condenser 5.

In each of the drawings, the cooling storage 2 is constituted by a heat insulating box 6 opening forward, and a front opening of a storage room 9 inside the heat insulating box 6 is provided with a plurality of heat insulating doors. It is openably closed by 7 and 8. A rectangular opening 12 is formed in the top wall 11 of the heat insulating box 6,
A heat insulating plate 13 is attached so as to close the opening 12. 14 is a control panel, and 16 is an electrical box.

On the upper surface of the heat insulating plate 13, two compressors 17 and 18 are installed.
Terminal portions 19, 19 each having a built-in power supply terminal plate are formed to protrude outward from the outer surface of each of the compressors 1.
A discharge-side pipe 21 and a suction-side pipe 22 are formed to protrude outward from the outer surfaces of the terminals 7 and 18 opposite to the terminal portions 19 and 19, respectively. Suction pipes 23 and 23 are connected to the suction side pipes 22, respectively. The suction pipes 23 and 23 are insertion holes 24 and 26 formed in the heat insulating plate 13.
The cooler 2 is inserted into the storage room 9 of the heat insulating box 6 and attached to the ceiling of the storage room 9 which is the lower surface of the heat insulating plate 3.
7 and 28, respectively. Coolers 27, 28
A cool air circulation blower 31 is attached to the front side, and a dew receiving plate 32 is arranged below each of the coolers 27 and 28.

On the other hand, the discharge side piping 2 of each of the compressors 17 and 18
1 and 21 are connected to condensing pipes 33 and 34 via high-pressure pipes 37 and 38 shown in FIG. 3, respectively, and the condensing pipes 33 and 34 are plate-fin type upper and lower condensers 3,
4, respectively. The condensers 3 and 4 are stacked one above the other and fixed on the left and right sides by duct plates 36 and 36 to be integrated as a condenser 5. The outlet pipes 39 and 41 of the condensing pipes 33 and 34 that have exited from the upper and lower condensers 3 and 4 then enter the storage room 9 and are connected to the respective coolers 27 and 28 via a pressure reducing device (not shown). Have been.

The compressors 17 and 18 are arranged adjacent to each other at the rear of the heat insulating plate 13 so as to be close to each other. Also,
The terminal portions 19, 19 are installed in front of the compressors 17, 18 so as to be close to each other, so that each of the compressors 1 located on the opposite side of the terminal portions 19, 19 is arranged.
7, 18 discharge-side pipes 21, 21 and suction-side pipes 22,
22 are spaced apart from each other. Thereby, even if the compressors 17 and 18 are installed close to each other, it is possible to prevent the interference between the pipes. Further, the condenser 5 is provided on the heat insulating plate 13 in front of the compressors 17 and 18, and a blower 44 is provided between the condenser 5 and the compressors 17 and 18. The terminal portions 19 are directed toward the blower 44 as shown in FIG.

With the above pipe connections, the compressors 17, 18
Constitute the well-known refrigeration cycles 46 and 47, respectively, whereby the cooling storage 2 is equipped with two independent refrigeration cycles 46 and 47. When the compressors 17 and 18 are operated, the compressors 17 and 18 are operated.
The high-temperature refrigerant discharged from the discharge-side pipes 21, 21 flows into the upper and lower condensers 3, 4, respectively. On the other hand, the blower 44 rotates and sucks air from the front and blows out the rear. When the blower 44 is operated, it sucks air (outside air) from the front and ventilates the upper and lower condensers 3 and 4. Blow backwards. Thereby, the outside air having a relatively low temperature is passed through the condensers 3 and 4, and the refrigerant flowing into the upper and lower condensers 3 and 4 is cooled by the air to radiate heat.
Condense.

The refrigerant condensed in the upper and lower condensers 3 and 4 is decompressed by the decompression device, and then flows into the coolers 27 and 28 to evaporate to exhibit a cooling function. Cooler 2
The cool air that has exchanged heat with the cool air 7 and 28 is supplied to the cool air circulation
Is forcedly circulated into the storage room 9, whereby the inside of the storage room 9 is cooled. Then, the refrigerant flowing out of the coolers 27 and 28 passes through the suction pipes 23 and 23, respectively, and is sucked into the compressors 17 and 18 from the suction pipes 22 and 22, respectively.

Here, as shown by an arrow in FIG.
The outside air blown rearward from the compressors 17 and 18 is located in the vicinity of the compressors 17 and 18 because the compressors 17 and 18 are installed close to each other.
8 is sprayed almost evenly and strongly. In addition, each compressor 1
Since the terminal portions 19, 19 protruding outward from the 7, 18 are directed toward the blower 44, the blown outside air is blown by the respective terminal portions 19, 19 to both side surfaces thereof as shown by arrows. Thereafter, the fluid flows smoothly along both side surfaces (left and right side surfaces viewed from the terminal portion 19) of the compressors 17, 18.

Therefore, both compressors 17 and 18 can be smoothly and satisfactorily air-cooled by a common, ie, single, blower 44.
It is possible to prevent the occurrence of damage to 7, 8 and the increase in power consumption or the decrease in cooling capacity.

Further, the above arrangement allows the compressors 17 and 18 to be provided close to each other as described above, so that the space on the heat insulating plate 13 occupied by both compressors 17 and 18 can be reduced. Yes, and therefore, it is possible to install another compressor 51 as shown in FIGS. In each drawing, the same reference numerals as those in FIGS. 1 to 3 denote the same components.

In this case, the interior of the heat insulating box 6 is provided with a partition wall 52.
The upper storage chamber 9a and the lower storage chamber 9b are formed by the compressor 17 and the refrigeration cycle 4.
The cooler 27 that constitutes 6 is provided at the top of the lower storage room 9b. Further, the suction pipe 23 of the refrigeration cycle 46 extends downward through a concave groove 53 formed on the back surface of the heat-insulating box 6, and circulates cool air in the lower storage room 9b in front of the cooler 27. Air blower 5 for cooling
4 is provided, and a dew tray 56 is provided below the cooler 27.

The third compressor 51 is provided with the heat insulating plate 13.
It is installed on the left side of the upper compressor 17. A similar terminal portion 19 is formed to protrude outward from the outer surface of the compressor 51, and a discharge-side pipe 21 and a suction-side pipe 22 are similarly outwardly formed from an outer surface opposite to the terminal portion 19. It is formed to protrude. A suction pipe 23 is connected to the suction side pipe 22, and the suction pipe 23 is inserted into the upper storage chamber 9 a of the heat insulating box 6 from the insertion port 24,
The cooler 2 is provided on the ceiling of the storage room 9 which is the lower surface of the heat insulating plate 3.
7 is connected to a cooler 57 which is attached instead.

On the other hand, the discharge pipe 21 of the compressor 51 is connected to a condensing pipe (not shown) via a high-pressure pipe (not shown), and the condensing pipe is inserted into a condenser 58 of a plate fin type. The condenser 58 is installed on the heat insulating plate 13 in front of the compressor 51, and a blower 59 is provided between the condenser 58 and the compressor 51. Condenser 5
The condensing pipe exiting from 8 then enters the storage chamber 9 and is connected to the cooler 57 via a pressure reducing device (not shown),
The compressor 51 constitutes a well-known refrigeration cycle 61 by the above-described piping connection, whereby the cooling storage 2 is equipped with three independent refrigeration cycles 46, 47, 61.

Hereinafter, the circulation of the refrigerant in the refrigeration cycle 61 is the same as that described above, and a description thereof will be omitted. However, with the above configuration, two or more storage chambers are defined in the cooling storage 2, and The temperature can be controlled by an independent refrigeration cycle. In the embodiment, the cooling device 1 of the present invention is constituted by two compressors 17 and 18, but may be constituted by three or more compressors if possible. However, also in this case, the terminal portions 19 of the compressors are oriented in a common blower direction.

[0027]

As described above in detail, according to the present invention, the condensers of a plurality of refrigeration cycles constituting the cooling device are air-cooled by a common blower, and the cooling air from the blower cools each compressor. I do. At this time, since each compressor has its terminal portion oriented in the direction of the blower and installed so as to be close to each other, the refrigerant pipes of each compressor projecting from the opposite side of the terminal portion are separated from each other. That is, each compressor can be installed close to each other. Thereby, the cooling air from the blower can be strongly blown to each compressor, and the installation space of the compressor and other devices can be reduced.

Further, the wind from the blower is blown off by terminals protruding outward from the compressor, and flows smoothly along the outer surfaces of the compressors. This can be satisfactorily achieved by the blower, and can prevent damage to the compressor, decrease in cooling capacity, or increase in power consumption.

[Brief description of the drawings]

FIG. 1 is a plan view of a ceiling of a cooling storage to which a cooling device of the present invention is applied.

FIG. 2 is a longitudinal sectional side view of the cooling storage.

FIG. 3 is a perspective view of a condenser of the cooling device of the present invention.

FIG. 4 is a plan view of a ceiling of a cooling storage according to another embodiment of the present invention.

FIG. 5 is a longitudinal sectional side view of the cooling storage in the case of FIG. 4;

FIG. 6 is a plan view of a ceiling of a cooling storage to which a conventional cooling device is applied.

FIG. 7 is a plan view of a ceiling of a cooling storage to which another conventional cooling device is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling apparatus 2 Cooling storage 3 Upper condenser 4 Lower condenser 5 Condenser 17 Compressor 18 Compressor 19 Terminal part 21 Discharge side pipe 22 Suction side pipe 27 Cooler 28 Cooler 44 Blower 46 Refrigeration cycle 47 Refrigeration cycle

Claims (1)

(57) [Claims] 1. A plurality of refrigerating cycles are respectively constituted by connecting a plurality of compressors with piping, and the condenser of each refrigerating cycle is air-cooled by a common blower, and is cooled by cooling air from the blower. In a cooling device configured to cool each of the compressors, each of the compressors includes a terminal portion that protrudes outward, and a refrigerant pipe that protrudes outward from a side opposite to the terminal portion, A cooling device, wherein a terminal portion is provided so as to be directed toward the blower and to be close to each other.